/* URL handling.
- Copyright (C) 1995, 1996, 1997, 2000, 2001, 2003, 2003
- Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,
+ Inc.
This file is part of GNU Wget.
GNU Wget is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or (at
+the Free Software Foundation; either version 3 of the License, or (at
your option) any later version.
GNU Wget is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with Wget; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+along with Wget. If not, see <http://www.gnu.org/licenses/>.
-In addition, as a special exception, the Free Software Foundation
-gives permission to link the code of its release of Wget with the
-OpenSSL project's "OpenSSL" library (or with modified versions of it
-that use the same license as the "OpenSSL" library), and distribute
-the linked executables. You must obey the GNU General Public License
-in all respects for all of the code used other than "OpenSSL". If you
-modify this file, you may extend this exception to your version of the
-file, but you are not obligated to do so. If you do not wish to do
-so, delete this exception statement from your version. */
+Additional permission under GNU GPL version 3 section 7
-#include <config.h>
+If you modify this program, or any covered work, by linking or
+combining it with the OpenSSL project's OpenSSL library (or a
+modified version of that library), containing parts covered by the
+terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
+grants you additional permission to convey the resulting work.
+Corresponding Source for a non-source form of such a combination
+shall include the source code for the parts of OpenSSL used as well
+as that of the covered work. */
+
+#include "wget.h"
#include <stdio.h>
#include <stdlib.h>
-#ifdef HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-#endif
-#include <sys/types.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <string.h>
+#include <unistd.h>
#include <errno.h>
#include <assert.h>
-#include "wget.h"
#include "utils.h"
#include "url.h"
-#include "host.h"
-#include "hash.h"
+#include "host.h" /* for is_valid_ipv6_address */
-#ifndef errno
-extern int errno;
+#ifdef __VMS
+#include "vms.h"
+#endif /* def __VMS */
+
+#ifdef TESTING
+#include "test.h"
#endif
+enum {
+ scm_disabled = 1, /* for https when OpenSSL fails to init. */
+ scm_has_params = 2, /* whether scheme has ;params */
+ scm_has_query = 4, /* whether scheme has ?query */
+ scm_has_fragment = 8 /* whether scheme has #fragment */
+};
+
struct scheme_data
{
- char *leading_string;
+ /* Short name of the scheme, such as "http" or "ftp". */
+ const char *name;
+ /* Leading string that identifies the scheme, such as "https://". */
+ const char *leading_string;
+ /* Default port of the scheme when none is specified. */
int default_port;
- int enabled;
+ /* Various flags. */
+ int flags;
};
/* Supported schemes: */
static struct scheme_data supported_schemes[] =
{
- { "http://", DEFAULT_HTTP_PORT, 1 },
+ { "http", "http://", DEFAULT_HTTP_PORT, scm_has_query|scm_has_fragment },
#ifdef HAVE_SSL
- { "https://", DEFAULT_HTTPS_PORT, 1 },
+ { "https", "https://", DEFAULT_HTTPS_PORT, scm_has_query|scm_has_fragment },
#endif
- { "ftp://", DEFAULT_FTP_PORT, 1 },
+ { "ftp", "ftp://", DEFAULT_FTP_PORT, scm_has_params|scm_has_fragment },
/* SCHEME_INVALID */
- { NULL, -1, 0 }
+ { NULL, NULL, -1, 0 }
};
/* Forward declarations: */
-static char *construct_relative PARAMS ((const char *, const char *));
-static int path_simplify PARAMS ((char *));
-
-
+static bool path_simplify (enum url_scheme, char *);
\f
-/* Support for encoding and decoding of URL strings. We determine
- whether a character is unsafe through static table lookup. This
- code assumes ASCII character set and 8-bit chars. */
+/* Support for escaping and unescaping of URL strings. */
+
+/* Table of "reserved" and "unsafe" characters. Those terms are
+ rfc1738-speak, as such largely obsoleted by rfc2396 and later
+ specs, but the general idea remains.
+
+ A reserved character is the one that you can't decode without
+ changing the meaning of the URL. For example, you can't decode
+ "/foo/%2f/bar" into "/foo///bar" because the number and contents of
+ path components is different. Non-reserved characters can be
+ changed, so "/foo/%78/bar" is safe to change to "/foo/x/bar". The
+ unsafe characters are loosely based on rfc1738, plus "$" and ",",
+ as recommended by rfc2396, and minus "~", which is very frequently
+ used (and sometimes unrecognized as %7E by broken servers).
+
+ An unsafe character is the one that should be encoded when URLs are
+ placed in foreign environments. E.g. space and newline are unsafe
+ in HTTP contexts because HTTP uses them as separator and line
+ terminator, so they must be encoded to %20 and %0A respectively.
+ "*" is unsafe in shell context, etc.
+
+ We determine whether a character is unsafe through static table
+ lookup. This code assumes ASCII character set and 8-bit chars. */
enum {
- /* rfc1738 reserved chars, preserved from encoding. */
+ /* rfc1738 reserved chars + "$" and ",". */
urlchr_reserved = 1,
- /* rfc1738 unsafe chars, plus some more. */
+ /* rfc1738 unsafe chars, plus non-printables. */
urlchr_unsafe = 2
};
#define U urlchr_unsafe
#define RU R|U
-const static unsigned char urlchr_table[256] =
+static const unsigned char urlchr_table[256] =
{
U, U, U, U, U, U, U, U, /* NUL SOH STX ETX EOT ENQ ACK BEL */
U, U, U, U, U, U, U, U, /* BS HT LF VT FF CR SO SI */
U, U, U, U, U, U, U, U, /* DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
U, U, U, U, U, U, U, U, /* CAN EM SUB ESC FS GS RS US */
- U, 0, U, RU, 0, U, R, 0, /* SP ! " # $ % & ' */
- 0, 0, 0, R, 0, 0, 0, R, /* ( ) * + , - . / */
+ U, 0, U, RU, R, U, R, 0, /* SP ! " # $ % & ' */
+ 0, 0, 0, R, R, 0, 0, R, /* ( ) * + , - . / */
0, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
0, 0, RU, R, U, R, U, R, /* 8 9 : ; < = > ? */
RU, 0, 0, 0, 0, 0, 0, 0, /* @ A B C D E F G */
U, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
0, 0, 0, 0, 0, 0, 0, 0, /* h i j k l m n o */
0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
- 0, 0, 0, U, U, U, U, U, /* x y z { | } ~ DEL */
+ 0, 0, 0, U, U, U, 0, U, /* x y z { | } ~ DEL */
U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
The transformation is done in place. If you need the original
string intact, make a copy before calling this function. */
-static void
+void
url_unescape (char *s)
{
- char *t = s; /* t - tortoise */
- char *h = s; /* h - hare */
+ char *t = s; /* t - tortoise */
+ char *h = s; /* h - hare */
for (; *h; h++, t++)
{
if (*h != '%')
- {
- copychar:
- *t = *h;
- }
+ {
+ copychar:
+ *t = *h;
+ }
else
- {
- /* Do nothing if '%' is not followed by two hex digits. */
- if (!h[1] || !h[2] || !(ISXDIGIT (h[1]) && ISXDIGIT (h[2])))
- goto copychar;
- *t = X2DIGITS_TO_NUM (h[1], h[2]);
- h += 2;
- }
+ {
+ char c;
+ /* Do nothing if '%' is not followed by two hex digits. */
+ if (!h[1] || !h[2] || !(c_isxdigit (h[1]) && c_isxdigit (h[2])))
+ goto copychar;
+ c = X2DIGITS_TO_NUM (h[1], h[2]);
+ /* Don't unescape %00 because there is no way to insert it
+ into a C string without effectively truncating it. */
+ if (c == '\0')
+ goto copychar;
+ *t = c;
+ h += 2;
+ }
}
*t = '\0';
}
/* The core of url_escape_* functions. Escapes the characters that
match the provided mask in urlchr_table.
- If ALLOW_PASSTHROUGH is non-zero, a string with no unsafe chars
- will be returned unchanged. If ALLOW_PASSTHROUGH is zero, a
- freshly allocated string will be returned in all cases. */
+ If ALLOW_PASSTHROUGH is true, a string with no unsafe chars will be
+ returned unchanged. If ALLOW_PASSTHROUGH is false, a freshly
+ allocated string will be returned in all cases. */
static char *
-url_escape_1 (const char *s, unsigned char mask, int allow_passthrough)
+url_escape_1 (const char *s, unsigned char mask, bool allow_passthrough)
{
const char *p1;
char *p2, *newstr;
for (p1 = s; *p1; p1++)
if (urlchr_test (*p1, mask))
- addition += 2; /* Two more characters (hex digits) */
+ addition += 2; /* Two more characters (hex digits) */
if (!addition)
return allow_passthrough ? (char *)s : xstrdup (s);
newlen = (p1 - s) + addition;
- newstr = (char *)xmalloc (newlen + 1);
+ newstr = xmalloc (newlen + 1);
p1 = s;
p2 = newstr;
{
/* Quote the characters that match the test mask. */
if (urlchr_test (*p1, mask))
- {
- unsigned char c = *p1++;
- *p2++ = '%';
- *p2++ = XNUM_TO_digit (c >> 4);
- *p2++ = XNUM_TO_digit (c & 0xf);
- }
+ {
+ unsigned char c = *p1++;
+ *p2++ = '%';
+ *p2++ = XNUM_TO_DIGIT (c >> 4);
+ *p2++ = XNUM_TO_DIGIT (c & 0xf);
+ }
else
- *p2++ = *p1++;
+ *p2++ = *p1++;
}
assert (p2 - newstr == newlen);
*p2 = '\0';
char *
url_escape (const char *s)
{
- return url_escape_1 (s, urlchr_unsafe, 0);
+ return url_escape_1 (s, urlchr_unsafe, false);
+}
+
+/* URL-escape the unsafe and reserved characters (see urlchr_table) in
+ a given string, returning a freshly allocated string. */
+
+char *
+url_escape_unsafe_and_reserved (const char *s)
+{
+ return url_escape_1 (s, urlchr_unsafe|urlchr_reserved, false);
}
/* URL-escape the unsafe characters (see urlchr_table) in a given
static char *
url_escape_allow_passthrough (const char *s)
{
- return url_escape_1 (s, urlchr_unsafe, 1);
+ return url_escape_1 (s, urlchr_unsafe, true);
}
\f
-enum copy_method { CM_DECODE, CM_ENCODE, CM_PASSTHROUGH };
+/* Decide whether the char at position P needs to be encoded. (It is
+ not enough to pass a single char *P because the function may need
+ to inspect the surrounding context.)
-/* Decide whether to encode, decode, or pass through the char at P.
- This used to be a macro, but it got a little too convoluted. */
-static inline enum copy_method
-decide_copy_method (const char *p)
+ Return true if the char should be escaped as %XX, false otherwise. */
+
+static inline bool
+char_needs_escaping (const char *p)
{
if (*p == '%')
{
- if (ISXDIGIT (*(p + 1)) && ISXDIGIT (*(p + 2)))
- {
- /* %xx sequence: decode it, unless it would decode to an
- unsafe or a reserved char; in that case, leave it as
- is. */
- char preempt = X2DIGITS_TO_NUM (*(p + 1), *(p + 2));
- if (URL_UNSAFE_CHAR (preempt) || URL_RESERVED_CHAR (preempt))
- return CM_PASSTHROUGH;
- else
- return CM_DECODE;
- }
+ if (c_isxdigit (*(p + 1)) && c_isxdigit (*(p + 2)))
+ return false;
else
- /* Garbled %.. sequence: encode `%'. */
- return CM_ENCODE;
+ /* Garbled %.. sequence: encode `%'. */
+ return true;
}
else if (URL_UNSAFE_CHAR (*p) && !URL_RESERVED_CHAR (*p))
- return CM_ENCODE;
+ return true;
else
- return CM_PASSTHROUGH;
+ return false;
}
/* Translate a %-escaped (but possibly non-conformant) input string S
After a URL has been run through this function, the protocols that
use `%' as the quote character can use the resulting string as-is,
- while those that don't call url_unescape() to get to the intended
- data. This function is also stable: after an input string is
- transformed the first time, all further transformations of the
- result yield the same result string.
+ while those that don't can use url_unescape to get to the intended
+ data. This function is stable: once the input is transformed,
+ further transformations of the result yield the same output.
Let's discuss why this function is needed.
- Imagine Wget is to retrieve `http://abc.xyz/abc def'. Since a raw
- space character would mess up the HTTP request, it needs to be
- quoted, like this:
+ Imagine Wget is asked to retrieve `http://abc.xyz/abc def'. Since
+ a raw space character would mess up the HTTP request, it needs to
+ be quoted, like this:
GET /abc%20def HTTP/1.0
- It appears that the unsafe chars need to be quoted, for example
- with url_escape. But what if we're requested to download
+ It would appear that the unsafe chars need to be quoted, for
+ example with url_escape. But what if we're requested to download
`abc%20def'? url_escape transforms "%" to "%25", which would leave
us with `abc%2520def'. This is incorrect -- since %-escapes are
part of URL syntax, "%20" is the correct way to denote a literal
- space on the Wget command line. This leaves us in the conclusion
- that in that case Wget should not call url_escape, but leave the
- `%20' as is.
+ space on the Wget command line. This leads to the conclusion that
+ in that case Wget should not call url_escape, but leave the `%20'
+ as is. This is clearly contradictory, but it only gets worse.
- And what if the requested URI is `abc%20 def'? If we call
- url_escape, we end up with `/abc%2520%20def', which is almost
- certainly not intended. If we don't call url_escape, we are left
- with the embedded space and cannot complete the request. What the
- user meant was for Wget to request `/abc%20%20def', and this is
- where reencode_escapes kicks in.
+ What if the requested URI is `abc%20 def'? If we call url_escape,
+ we end up with `/abc%2520%20def', which is almost certainly not
+ intended. If we don't call url_escape, we are left with the
+ embedded space and cannot complete the request. What the user
+ meant was for Wget to request `/abc%20%20def', and this is where
+ reencode_escapes kicks in.
Wget used to solve this by first decoding %-quotes, and then
encoding all the "unsafe" characters found in the resulting string.
literal plus. reencode_escapes correctly translates the above to
"a%2B+b", i.e. returns the original string.
- This function uses an algorithm proposed by Anon Sricharoenchai:
+ This function uses a modified version of the algorithm originally
+ proposed by Anon Sricharoenchai:
- 1. Encode all URL_UNSAFE and the "%" that are not followed by 2
- hexdigits.
+ * Encode all "unsafe" characters, except those that are also
+ "reserved", to %XX. See urlchr_table for which characters are
+ unsafe and reserved.
- 2. Decode all "%XX" except URL_UNSAFE, URL_RESERVED (";/?:@=&") and
- "+".
+ * Encode the "%" characters not followed by two hex digits to
+ "%25".
- ...except that this code conflates the two steps, and decides
- whether to encode, decode, or pass through each character in turn.
- The function still uses two passes, but their logic is the same --
- the first pass exists merely for the sake of allocation. Another
- small difference is that we include `+' to URL_RESERVED.
+ * Pass through all other characters and %XX escapes as-is. (Up to
+ Wget 1.10 this decoded %XX escapes corresponding to "safe"
+ characters, but that was obtrusive and broke some servers.)
Anon's test case:
"http://abc.xyz/%20%3F%%36%31%25aa% a?a=%61+a%2Ba&b=b%26c%3Dc"
->
- "http://abc.xyz/%20%3F%2561%25aa%25%20a?a=a+a%2Ba&b=b%26c%3Dc"
+ "http://abc.xyz/%20%3F%25%36%31%25aa%25%20a?a=%61+a%2Ba&b=b%26c%3Dc"
Simpler test cases:
int oldlen, newlen;
int encode_count = 0;
- int decode_count = 0;
- /* First, pass through the string to see if there's anything to do,
+ /* First pass: inspect the string to see if there's anything to do,
and to calculate the new length. */
for (p1 = s; *p1; p1++)
- {
- switch (decide_copy_method (p1))
- {
- case CM_ENCODE:
- ++encode_count;
- break;
- case CM_DECODE:
- ++decode_count;
- break;
- case CM_PASSTHROUGH:
- break;
- }
- }
+ if (char_needs_escaping (p1))
+ ++encode_count;
- if (!encode_count && !decode_count)
+ if (!encode_count)
/* The string is good as it is. */
- return (char *)s; /* C const model sucks. */
+ return (char *) s; /* C const model sucks. */
oldlen = p1 - s;
- /* Each encoding adds two characters (hex digits), while each
- decoding removes two characters. */
- newlen = oldlen + 2 * (encode_count - decode_count);
+ /* Each encoding adds two characters (hex digits). */
+ newlen = oldlen + 2 * encode_count;
newstr = xmalloc (newlen + 1);
+ /* Second pass: copy the string to the destination address, encoding
+ chars when needed. */
p1 = s;
p2 = newstr;
while (*p1)
- {
- switch (decide_copy_method (p1))
- {
- case CM_ENCODE:
- {
- unsigned char c = *p1++;
- *p2++ = '%';
- *p2++ = XNUM_TO_DIGIT (c >> 4);
- *p2++ = XNUM_TO_DIGIT (c & 0xf);
- }
- break;
- case CM_DECODE:
- *p2++ = X2DIGITS_TO_NUM (p1[1], p1[2]);
- p1 += 3; /* skip %xx */
- break;
- case CM_PASSTHROUGH:
- *p2++ = *p1++;
- }
- }
+ if (char_needs_escaping (p1))
+ {
+ unsigned char c = *p1++;
+ *p2++ = '%';
+ *p2++ = XNUM_TO_DIGIT (c >> 4);
+ *p2++ = XNUM_TO_DIGIT (c & 0xf);
+ }
+ else
+ *p2++ = *p1++;
+
*p2 = '\0';
assert (p2 - newstr == newlen);
return newstr;
\f
/* Returns the scheme type if the scheme is supported, or
SCHEME_INVALID if not. */
+
enum url_scheme
url_scheme (const char *url)
{
for (i = 0; supported_schemes[i].leading_string; i++)
if (0 == strncasecmp (url, supported_schemes[i].leading_string,
- strlen (supported_schemes[i].leading_string)))
+ strlen (supported_schemes[i].leading_string)))
{
- if (supported_schemes[i].enabled)
- return (enum url_scheme) i;
- else
- return SCHEME_INVALID;
+ if (!(supported_schemes[i].flags & scm_disabled))
+ return (enum url_scheme) i;
+ else
+ return SCHEME_INVALID;
}
return SCHEME_INVALID;
}
-/* Return the number of characters needed to skip the scheme part of
- the URL, e.g. `http://'. If no scheme is found, returns 0. */
-int
-url_skip_scheme (const char *url)
-{
- const char *p = url;
-
- /* Skip the scheme name. We allow `-' and `+' because of `whois++',
- etc. */
- while (ISALNUM (*p) || *p == '-' || *p == '+')
- ++p;
- if (*p != ':')
- return 0;
- /* Skip ':'. */
- ++p;
-
- /* Skip "//" if found. */
- if (*p == '/' && *(p + 1) == '/')
- p += 2;
+#define SCHEME_CHAR(ch) (c_isalnum (ch) || (ch) == '-' || (ch) == '+')
- return p - url;
-}
+/* Return 1 if the URL begins with any "scheme", 0 otherwise. As
+ currently implemented, it returns true if URL begins with
+ [-+a-zA-Z0-9]+: . */
-/* Returns 1 if the URL begins with a scheme (supported or
- unsupported), 0 otherwise. */
-int
+bool
url_has_scheme (const char *url)
{
const char *p = url;
- while (ISALNUM (*p) || *p == '-' || *p == '+')
+
+ /* The first char must be a scheme char. */
+ if (!*p || !SCHEME_CHAR (*p))
+ return false;
+ ++p;
+ /* Followed by 0 or more scheme chars. */
+ while (*p && SCHEME_CHAR (*p))
++p;
+ /* Terminated by ':'. */
return *p == ':';
}
+bool
+url_valid_scheme (const char *url)
+{
+ enum url_scheme scheme = url_scheme (url);
+ return scheme != SCHEME_INVALID;
+}
+
int
scheme_default_port (enum url_scheme scheme)
{
void
scheme_disable (enum url_scheme scheme)
{
- supported_schemes[scheme].enabled = 0;
+ supported_schemes[scheme].flags |= scm_disabled;
}
-/* Skip the username and password, if present here. The function
- should be called *not* with the complete URL, but with the part
- right after the scheme.
+/* Skip the username and password, if present in the URL. The
+ function should *not* be called with the complete URL, but with the
+ portion after the scheme.
- If no username and password are found, return 0. */
-int
-url_skip_uname (const char *url)
-{
- const char *p;
+ If no username and password are found, return URL. */
- /* Look for '@' that comes before '/' or '?'. */
- p = (const char *)strpbrk (url, "/?@");
+static const char *
+url_skip_credentials (const char *url)
+{
+ /* Look for '@' that comes before terminators, such as '/', '?',
+ '#', or ';'. */
+ const char *p = (const char *)strpbrk (url, "@/?#;");
if (!p || *p != '@')
- return 0;
-
- return p - url + 1;
+ return url;
+ return p + 1;
}
-static int
-parse_uname (const char *str, int len, char **user, char **passwd)
+/* Parse credentials contained in [BEG, END). The region is expected
+ to have come from a URL and is unescaped. */
+
+static bool
+parse_credentials (const char *beg, const char *end, char **user, char **passwd)
{
char *colon;
+ const char *userend;
- if (len == 0)
- /* Empty user name not allowed. */
- return 0;
+ if (beg == end)
+ return false; /* empty user name */
- colon = memchr (str, ':', len);
- if (colon == str)
- /* Empty user name again. */
- return 0;
+ colon = memchr (beg, ':', end - beg);
+ if (colon == beg)
+ return false; /* again empty user name */
if (colon)
{
- int pwlen = len - (colon + 1 - str);
- *passwd = xmalloc (pwlen + 1);
- memcpy (*passwd, colon + 1, pwlen);
- (*passwd)[pwlen] = '\0';
- len -= pwlen + 1;
+ *passwd = strdupdelim (colon + 1, end);
+ userend = colon;
+ url_unescape (*passwd);
}
else
- *passwd = NULL;
-
- *user = xmalloc (len + 1);
- memcpy (*user, str, len);
- (*user)[len] = '\0';
-
- if (*user)
- url_unescape (*user);
- if (*passwd)
- url_unescape (*passwd);
-
- return 1;
+ {
+ *passwd = NULL;
+ userend = end;
+ }
+ *user = strdupdelim (beg, userend);
+ url_unescape (*user);
+ return true;
}
/* Used by main.c: detect URLs written using the "shorthand" URL forms
- popularized by Netscape and NcFTP. HTTP shorthands look like this:
+ originally popularized by Netscape and NcFTP. HTTP shorthands look
+ like this:
www.foo.com[:port]/dir/file -> http://www.foo.com[:port]/dir/file
www.foo.com[:port] -> http://www.foo.com[:port]
foo.bar.com:/absdir/file -> ftp://foo.bar.com//absdir/file
If the URL needs not or cannot be rewritten, return NULL. */
+
char *
rewrite_shorthand_url (const char *url)
{
const char *p;
+ char *ret;
- if (url_has_scheme (url))
+ if (url_scheme (url) != SCHEME_INVALID)
return NULL;
/* Look for a ':' or '/'. The former signifies NcFTP syntax, the
latter Netscape. */
- for (p = url; *p && *p != ':' && *p != '/'; p++)
- ;
-
+ p = strpbrk (url, ":/");
if (p == url)
return NULL;
- if (*p == ':')
+ /* If we're looking at "://", it means the URL uses a scheme we
+ don't support, which may include "https" when compiled without
+ SSL support. Don't bogusly rewrite such URLs. */
+ if (p && p[0] == ':' && p[1] == '/' && p[2] == '/')
+ return NULL;
+
+ if (p && *p == ':')
{
- const char *pp;
- char *res;
- /* If the characters after the colon and before the next slash
- or end of string are all digits, it's HTTP. */
- int digits = 0;
- for (pp = p + 1; ISDIGIT (*pp); pp++)
- ++digits;
- if (digits > 0 && (*pp == '/' || *pp == '\0'))
- goto http;
-
- /* Prepend "ftp://" to the entire URL... */
- res = xmalloc (6 + strlen (url) + 1);
- sprintf (res, "ftp://%s", url);
- /* ...and replace ':' with '/'. */
- res[6 + (p - url)] = '/';
- return res;
+ /* Colon indicates ftp, as in foo.bar.com:path. Check for
+ special case of http port number ("localhost:10000"). */
+ int digits = strspn (p + 1, "0123456789");
+ if (digits && (p[1 + digits] == '/' || p[1 + digits] == '\0'))
+ goto http;
+
+ /* Turn "foo.bar.com:path" to "ftp://foo.bar.com/path". */
+ ret = aprintf ("ftp://%s", url);
+ ret[6 + (p - url)] = '/';
}
else
{
- char *res;
http:
- /* Just prepend "http://" to what we have. */
- res = xmalloc (7 + strlen (url) + 1);
- sprintf (res, "http://%s", url);
- return res;
+ /* Just prepend "http://" to URL. */
+ ret = aprintf ("http://%s", url);
}
+ return ret;
}
\f
-static void parse_path PARAMS ((const char *, char **, char **));
+static void split_path (const char *, char **, char **);
/* Like strpbrk, with the exception that it returns the pointer to the
terminating zero (end-of-string aka "eos") if no matching character
- is found.
-
- Although I normally balk at Gcc-specific optimizations, it probably
- makes sense here: glibc has optimizations that detect strpbrk being
- called with literal string as ACCEPT and inline the search. That
- optimization is defeated if strpbrk is hidden within the call to
- another function. (And no, making strpbrk_or_eos inline doesn't
- help because the check for literal accept is in the
- preprocessor.) */
-
-#ifdef __GNUC__
-
-#define strpbrk_or_eos(s, accept) ({ \
- char *SOE_p = strpbrk (s, accept); \
- if (!SOE_p) \
- SOE_p = (char *)s + strlen (s); \
- SOE_p; \
-})
+ is found. */
-#else /* not __GNUC__ */
-
-static char *
+static inline char *
strpbrk_or_eos (const char *s, const char *accept)
{
char *p = strpbrk (s, accept);
if (!p)
- p = (char *)s + strlen (s);
+ p = strchr (s, '\0');
return p;
}
-#endif
-/* Turn STR into lowercase; return non-zero if a character was
- actually changed. */
+/* Turn STR into lowercase; return true if a character was actually
+ changed. */
-static int
+static bool
lowercase_str (char *str)
{
- int change = 0;
+ bool changed = false;
for (; *str; str++)
- if (ISUPPER (*str))
+ if (c_isupper (*str))
{
- change = 1;
- *str = TOLOWER (*str);
+ changed = true;
+ *str = c_tolower (*str);
}
- return change;
+ return changed;
}
-static char *parse_errors[] = {
-#define PE_NO_ERROR 0
- "No error",
-#define PE_UNSUPPORTED_SCHEME 1
- "Unsupported scheme",
-#define PE_EMPTY_HOST 2
- "Empty host",
-#define PE_BAD_PORT_NUMBER 3
- "Bad port number",
-#define PE_INVALID_USER_NAME 4
- "Invalid user name",
-#define PE_UNTERMINATED_IPV6_ADDRESS 5
- "Unterminated IPv6 numeric address",
-#define PE_IPV6_NOT_SUPPORTED 6
- "IPv6 addresses not supported",
-#define PE_INVALID_IPV6_ADDRESS 7
- "Invalid IPv6 numeric address"
-};
-
-#define SETERR(p, v) do { \
- if (p) \
- *(p) = (v); \
-} while (0)
-
-#ifdef ENABLE_IPV6
-/* The following two functions were adapted from glibc. */
-
-static int
-is_valid_ipv4_address (const char *str, const char *end)
-{
- int saw_digit, octets;
- int val;
-
- saw_digit = 0;
- octets = 0;
- val = 0;
-
- while (str < end) {
- int ch = *str++;
-
- if (ch >= '0' && ch <= '9') {
- val = val * 10 + (ch - '0');
-
- if (val > 255)
- return 0;
- if (saw_digit == 0) {
- if (++octets > 4)
- return 0;
- saw_digit = 1;
- }
- } else if (ch == '.' && saw_digit == 1) {
- if (octets == 4)
- return 0;
- val = 0;
- saw_digit = 0;
- } else
- return 0;
- }
- if (octets < 4)
- return 0;
-
- return 1;
+static const char *
+init_seps (enum url_scheme scheme)
+{
+ static char seps[8] = ":/";
+ char *p = seps + 2;
+ int flags = supported_schemes[scheme].flags;
+
+ if (flags & scm_has_params)
+ *p++ = ';';
+ if (flags & scm_has_query)
+ *p++ = '?';
+ if (flags & scm_has_fragment)
+ *p++ = '#';
+ *p = '\0';
+ return seps;
}
-static const int NS_INADDRSZ = 4;
-static const int NS_IN6ADDRSZ = 16;
-static const int NS_INT16SZ = 2;
-
-static int
-is_valid_ipv6_address (const char *str, const char *end)
-{
- static const char xdigits[] = "0123456789abcdef";
- const char *curtok;
- int tp;
- const char *colonp;
- int saw_xdigit;
- unsigned int val;
-
- tp = 0;
- colonp = NULL;
-
- if (str == end)
- return 0;
-
- /* Leading :: requires some special handling. */
- if (*str == ':')
- {
- ++str;
- if (str == end || *str != ':')
- return 0;
- }
-
- curtok = str;
- saw_xdigit = 0;
- val = 0;
-
- while (str < end) {
- int ch = *str++;
- const char *pch;
-
- /* if ch is a number, add it to val. */
- pch = strchr(xdigits, ch);
- if (pch != NULL) {
- val <<= 4;
- val |= (pch - xdigits);
- if (val > 0xffff)
- return 0;
- saw_xdigit = 1;
- continue;
- }
-
- /* if ch is a colon ... */
- if (ch == ':') {
- curtok = str;
- if (saw_xdigit == 0) {
- if (colonp != NULL)
- return 0;
- colonp = str + tp;
- continue;
- } else if (str == end) {
- return 0;
- }
- if (tp > NS_IN6ADDRSZ - NS_INT16SZ)
- return 0;
- tp += NS_INT16SZ;
- saw_xdigit = 0;
- val = 0;
- continue;
- }
-
- /* if ch is a dot ... */
- if (ch == '.' && (tp <= NS_IN6ADDRSZ - NS_INADDRSZ) &&
- is_valid_ipv4_address(curtok, end) == 1) {
- tp += NS_INADDRSZ;
- saw_xdigit = 0;
- break;
- }
-
- return 0;
- }
-
- if (saw_xdigit == 1) {
- if (tp > NS_IN6ADDRSZ - NS_INT16SZ)
- return 0;
- tp += NS_INT16SZ;
- }
-
- if (colonp != NULL) {
- if (tp == NS_IN6ADDRSZ)
- return 0;
- tp = NS_IN6ADDRSZ;
- }
-
- if (tp != NS_IN6ADDRSZ)
- return 0;
-
- return 1;
-}
-#endif
+static const char *parse_errors[] = {
+#define PE_NO_ERROR 0
+ N_("No error"),
+#define PE_UNSUPPORTED_SCHEME 1
+ N_("Unsupported scheme %s"), /* support for format token only here */
+#define PE_MISSING_SCHEME 2
+ N_("Scheme missing"),
+#define PE_INVALID_HOST_NAME 3
+ N_("Invalid host name"),
+#define PE_BAD_PORT_NUMBER 4
+ N_("Bad port number"),
+#define PE_INVALID_USER_NAME 5
+ N_("Invalid user name"),
+#define PE_UNTERMINATED_IPV6_ADDRESS 6
+ N_("Unterminated IPv6 numeric address"),
+#define PE_IPV6_NOT_SUPPORTED 7
+ N_("IPv6 addresses not supported"),
+#define PE_INVALID_IPV6_ADDRESS 8
+ N_("Invalid IPv6 numeric address")
+};
/* Parse a URL.
error, and if ERROR is not NULL, also set *ERROR to the appropriate
error code. */
struct url *
-url_parse (const char *url, int *error)
+url_parse (const char *url, int *error, struct iri *iri, bool percent_encode)
{
struct url *u;
const char *p;
- int path_modified, host_modified;
+ bool path_modified, host_modified;
enum url_scheme scheme;
+ const char *seps;
const char *uname_b, *uname_e;
const char *host_b, *host_e;
int port;
char *user = NULL, *passwd = NULL;
- char *url_encoded;
+ const char *url_encoded = NULL;
+ char *new_url = NULL;
+
+ int error_code;
scheme = url_scheme (url);
if (scheme == SCHEME_INVALID)
{
- SETERR (error, PE_UNSUPPORTED_SCHEME);
- return NULL;
+ if (url_has_scheme (url))
+ error_code = PE_UNSUPPORTED_SCHEME;
+ else
+ error_code = PE_MISSING_SCHEME;
+ goto error;
+ }
+
+ if (iri && iri->utf8_encode)
+ {
+ iri->utf8_encode = remote_to_utf8 (iri, iri->orig_url ? iri->orig_url : url, (const char **) &new_url);
+ if (!iri->utf8_encode)
+ new_url = NULL;
+ else
+ {
+ iri->orig_url = xstrdup (url);
+ percent_encode = true;
+ }
}
- url_encoded = reencode_escapes (url);
+ /* XXX XXX Could that change introduce (security) bugs ??? XXX XXX*/
+ if (percent_encode)
+ url_encoded = reencode_escapes (new_url ? new_url : url);
+ else
+ url_encoded = new_url ? new_url : url;
+
p = url_encoded;
+ if (new_url && url_encoded != new_url)
+ xfree (new_url);
+
p += strlen (supported_schemes[scheme].leading_string);
uname_b = p;
- p += url_skip_uname (p);
+ p = url_skip_credentials (p);
uname_e = p;
/* scheme://user:pass@host[:port]... */
scheme://host[:port][/path][;params][?query][#fragment] */
+ path_b = path_e = NULL;
params_b = params_e = NULL;
query_b = query_e = NULL;
fragment_b = fragment_e = NULL;
+ /* Initialize separators for optional parts of URL, depending on the
+ scheme. For example, FTP has params, and HTTP and HTTPS have
+ query string and fragment. */
+ seps = init_seps (scheme);
+
host_b = p;
if (*p == '[')
{
/* Handle IPv6 address inside square brackets. Ideally we'd
- just look for the terminating ']', but rfc2732 mandates
- rejecting invalid IPv6 addresses. */
+ just look for the terminating ']', but rfc2732 mandates
+ rejecting invalid IPv6 addresses. */
/* The address begins after '['. */
host_b = p + 1;
host_e = strchr (host_b, ']');
if (!host_e)
- {
- SETERR (error, PE_UNTERMINATED_IPV6_ADDRESS);
- return NULL;
- }
+ {
+ error_code = PE_UNTERMINATED_IPV6_ADDRESS;
+ goto error;
+ }
#ifdef ENABLE_IPV6
/* Check if the IPv6 address is valid. */
if (!is_valid_ipv6_address(host_b, host_e))
- {
- SETERR (error, PE_INVALID_IPV6_ADDRESS);
- return NULL;
- }
+ {
+ error_code = PE_INVALID_IPV6_ADDRESS;
+ goto error;
+ }
/* Continue parsing after the closing ']'. */
p = host_e + 1;
#else
- SETERR (error, PE_IPV6_NOT_SUPPORTED);
- return NULL;
+ error_code = PE_IPV6_NOT_SUPPORTED;
+ goto error;
#endif
+
+ /* The closing bracket must be followed by a separator or by the
+ null char. */
+ /* http://[::1]... */
+ /* ^ */
+ if (!strchr (seps, *p))
+ {
+ /* Trailing garbage after []-delimited IPv6 address. */
+ error_code = PE_INVALID_HOST_NAME;
+ goto error;
+ }
}
else
{
- p = strpbrk_or_eos (p, ":/;?#");
+ p = strpbrk_or_eos (p, seps);
host_e = p;
}
+ ++seps; /* advance to '/' */
if (host_b == host_e)
{
- SETERR (error, PE_EMPTY_HOST);
- return NULL;
+ error_code = PE_INVALID_HOST_NAME;
+ goto error;
}
port = scheme_default_port (scheme);
/* ^ */
++p;
port_b = p;
- p = strpbrk_or_eos (p, "/;?#");
+ p = strpbrk_or_eos (p, seps);
port_e = p;
- if (port_b == port_e)
- {
- /* http://host:/whatever */
- /* ^ */
- SETERR (error, PE_BAD_PORT_NUMBER);
- return NULL;
- }
-
- for (port = 0, pp = port_b; pp < port_e; pp++)
- {
- if (!ISDIGIT (*pp))
- {
- /* http://host:12randomgarbage/blah */
- /* ^ */
- SETERR (error, PE_BAD_PORT_NUMBER);
- return NULL;
- }
-
- port = 10 * port + (*pp - '0');
- }
- }
+ /* Allow empty port, as per rfc2396. */
+ if (port_b != port_e)
+ for (port = 0, pp = port_b; pp < port_e; pp++)
+ {
+ if (!c_isdigit (*pp))
+ {
+ /* http://host:12randomgarbage/blah */
+ /* ^ */
+ error_code = PE_BAD_PORT_NUMBER;
+ goto error;
+ }
+ port = 10 * port + (*pp - '0');
+ /* Check for too large port numbers here, before we have
+ a chance to overflow on bogus port values. */
+ if (port > 0xffff)
+ {
+ error_code = PE_BAD_PORT_NUMBER;
+ goto error;
+ }
+ }
+ }
+ /* Advance to the first separator *after* '/' (either ';' or '?',
+ depending on the scheme). */
+ ++seps;
+
+ /* Get the optional parts of URL, each part being delimited by
+ current location and the position of the next separator. */
+#define GET_URL_PART(sepchar, var) do { \
+ if (*p == sepchar) \
+ var##_b = ++p, var##_e = p = strpbrk_or_eos (p, seps); \
+ ++seps; \
+} while (0)
- if (*p == '/')
- {
- ++p;
- path_b = p;
- p = strpbrk_or_eos (p, ";?#");
- path_e = p;
- }
- else
- {
- /* Path is not allowed not to exist. */
- path_b = path_e = p;
- }
+ GET_URL_PART ('/', path);
+ if (supported_schemes[scheme].flags & scm_has_params)
+ GET_URL_PART (';', params);
+ if (supported_schemes[scheme].flags & scm_has_query)
+ GET_URL_PART ('?', query);
+ if (supported_schemes[scheme].flags & scm_has_fragment)
+ GET_URL_PART ('#', fragment);
- if (*p == ';')
- {
- ++p;
- params_b = p;
- p = strpbrk_or_eos (p, "?#");
- params_e = p;
- }
- if (*p == '?')
- {
- ++p;
- query_b = p;
- p = strpbrk_or_eos (p, "#");
- query_e = p;
-
- /* Hack that allows users to use '?' (a wildcard character) in
- FTP URLs without it being interpreted as a query string
- delimiter. */
- if (scheme == SCHEME_FTP)
- {
- query_b = query_e = NULL;
- path_e = p;
- }
- }
- if (*p == '#')
- {
- ++p;
- fragment_b = p;
- p += strlen (p);
- fragment_e = p;
- }
+#undef GET_URL_PART
assert (*p == 0);
if (uname_b != uname_e)
/* http://user:pass@host */
/* ^ ^ */
/* uname_b uname_e */
- if (!parse_uname (uname_b, uname_e - uname_b - 1, &user, &passwd))
- {
- SETERR (error, PE_INVALID_USER_NAME);
- return NULL;
- }
+ if (!parse_credentials (uname_b, uname_e - 1, &user, &passwd))
+ {
+ error_code = PE_INVALID_USER_NAME;
+ goto error;
+ }
}
- u = (struct url *)xmalloc (sizeof (struct url));
- memset (u, 0, sizeof (*u));
-
+ u = xnew0 (struct url);
u->scheme = scheme;
u->host = strdupdelim (host_b, host_e);
u->port = port;
u->passwd = passwd;
u->path = strdupdelim (path_b, path_e);
- path_modified = path_simplify (u->path);
- parse_path (u->path, &u->dir, &u->file);
+ path_modified = path_simplify (scheme, u->path);
+ split_path (u->path, &u->dir, &u->file);
host_modified = lowercase_str (u->host);
+ /* Decode %HH sequences in host name. This is important not so much
+ to support %HH sequences in host names (which other browser
+ don't), but to support binary characters (which will have been
+ converted to %HH by reencode_escapes). */
+ if (strchr (u->host, '%'))
+ {
+ url_unescape (u->host);
+ host_modified = true;
+
+ /* Apply IDNA regardless of iri->utf8_encode status */
+ if (opt.enable_iri && iri)
+ {
+ char *new = idn_encode (iri, u->host);
+ if (new)
+ {
+ xfree (u->host);
+ u->host = new;
+ host_modified = true;
+ }
+ }
+ }
+
if (params_b)
u->params = strdupdelim (params_b, params_e);
if (query_b)
if (fragment_b)
u->fragment = strdupdelim (fragment_b, fragment_e);
- if (path_modified || u->fragment || host_modified || path_b == path_e)
+ if (opt.enable_iri || path_modified || u->fragment || host_modified || path_b == path_e)
{
/* If we suspect that a transformation has rendered what
- url_string might return different from URL_ENCODED, rebuild
- u->url using url_string. */
- u->url = url_string (u, 0);
+ url_string might return different from URL_ENCODED, rebuild
+ u->url using url_string. */
+ u->url = url_string (u, URL_AUTH_SHOW);
if (url_encoded != url)
- xfree ((char *) url_encoded);
+ xfree ((char *) url_encoded);
}
else
{
if (url_encoded == url)
- u->url = xstrdup (url);
+ u->url = xstrdup (url);
else
- u->url = url_encoded;
+ u->url = (char *) url_encoded;
}
- url_encoded = NULL;
return u;
+
+ error:
+ /* Cleanup in case of error: */
+ if (url_encoded && url_encoded != url)
+ xfree ((char *) url_encoded);
+
+ /* Transmit the error code to the caller, if the caller wants to
+ know. */
+ if (error)
+ *error = error_code;
+ return NULL;
}
-const char *
-url_error (int error_code)
+/* Return the error message string from ERROR_CODE, which should have
+ been retrieved from url_parse. The error message is translated. */
+
+char *
+url_error (const char *url, int error_code)
{
- assert (error_code >= 0 && error_code < countof (parse_errors));
- return parse_errors[error_code];
+ assert (error_code >= 0 && ((size_t) error_code) < countof (parse_errors));
+
+ if (error_code == PE_UNSUPPORTED_SCHEME)
+ {
+ char *error, *p;
+ char *scheme = xstrdup (url);
+ assert (url_has_scheme (url));
+
+ if ((p = strchr (scheme, ':')))
+ *p = '\0';
+ if (!strcasecmp (scheme, "https"))
+ error = aprintf (_("HTTPS support not compiled in"));
+ else
+ error = aprintf (_(parse_errors[error_code]), quote (scheme));
+ xfree (scheme);
+
+ return error;
+ }
+ else
+ return xstrdup (_(parse_errors[error_code]));
}
-/* Parse PATH into dir and file. PATH is extracted from the URL and
- is URL-escaped. The function returns unescaped DIR and FILE. */
+/* Split PATH into DIR and FILE. PATH comes from the URL and is
+ expected to be URL-escaped.
+
+ The path is split into directory (the part up to the last slash)
+ and file (the part after the last slash), which are subsequently
+ unescaped. Examples:
+
+ PATH DIR FILE
+ "foo/bar/baz" "foo/bar" "baz"
+ "foo/bar/" "foo/bar" ""
+ "foo" "" "foo"
+ "foo/bar/baz%2fqux" "foo/bar" "baz/qux" (!)
+
+ DIR and FILE are freshly allocated. */
static void
-parse_path (const char *path, char **dir, char **file)
+split_path (const char *path, char **dir, char **file)
{
- char *last_slash;
-
- last_slash = strrchr (path, '/');
+ char *last_slash = strrchr (path, '/');
if (!last_slash)
{
*dir = xstrdup ("");
static void
full_path_write (const struct url *url, char *where)
{
-#define FROB(el, chr) do { \
- char *f_el = url->el; \
- if (f_el) { \
- int l = strlen (f_el); \
- *where++ = chr; \
- memcpy (where, f_el, l); \
- where += l; \
- } \
+#define FROB(el, chr) do { \
+ char *f_el = url->el; \
+ if (f_el) { \
+ int l = strlen (f_el); \
+ *where++ = chr; \
+ memcpy (where, f_el, l); \
+ where += l; \
+ } \
} while (0)
FROB (path, '/');
url_full_path (const struct url *url)
{
int length = full_path_length (url);
- char *full_path = (char *)xmalloc(length + 1);
+ char *full_path = xmalloc (length + 1);
full_path_write (url, full_path);
full_path[length] = '\0';
return full_path;
}
+/* Unescape CHR in an otherwise escaped STR. Used to selectively
+ escaping of certain characters, such as "/" and ":". Returns a
+ count of unescaped chars. */
+
+static void
+unescape_single_char (char *str, char chr)
+{
+ const char c1 = XNUM_TO_DIGIT (chr >> 4);
+ const char c2 = XNUM_TO_DIGIT (chr & 0xf);
+ char *h = str; /* hare */
+ char *t = str; /* tortoise */
+ for (; *h; h++, t++)
+ {
+ if (h[0] == '%' && h[1] == c1 && h[2] == c2)
+ {
+ *t = chr;
+ h += 2;
+ }
+ else
+ *t = *h;
+ }
+ *t = '\0';
+}
+
/* Escape unsafe and reserved characters, except for the slash
characters. */
url_escape_dir (const char *dir)
{
char *newdir = url_escape_1 (dir, urlchr_unsafe | urlchr_reserved, 1);
- char *h, *t;
if (newdir == dir)
return (char *)dir;
- /* Unescape slashes in NEWDIR. */
-
- h = newdir; /* hare */
- t = newdir; /* tortoise */
-
- for (; *h; h++, t++)
- {
- if (*h == '%' && h[1] == '2' && h[2] == 'F')
- {
- *t = '/';
- h += 2;
- }
- else
- *t = *h;
- }
- *t = '\0';
-
+ unescape_single_char (newdir, '/');
return newdir;
}
*p++ = '/';
memcpy (p, efile, filelen);
p += filelen;
- *p++ = '\0';
+ *p = '\0';
}
u->path = newpath;
/* Regenerate u->url as well. */
xfree (u->url);
- u->url = url_string (u, 0);
+ u->url = url_string (u, URL_AUTH_SHOW);
}
/* Mutators. Code in ftp.c insists on changing u->dir and u->file.
xfree (url->path);
xfree (url->url);
- FREE_MAYBE (url->params);
- FREE_MAYBE (url->query);
- FREE_MAYBE (url->fragment);
- FREE_MAYBE (url->user);
- FREE_MAYBE (url->passwd);
+ xfree_null (url->params);
+ xfree_null (url->query);
+ xfree_null (url->fragment);
+ xfree_null (url->user);
+ xfree_null (url->passwd);
xfree (url->dir);
xfree (url->file);
xfree (url);
}
\f
-struct urlpos *
-get_urls_file (const char *file)
-{
- struct file_memory *fm;
- struct urlpos *head, *tail;
- const char *text, *text_end;
-
- /* Load the file. */
- fm = read_file (file);
- if (!fm)
- {
- logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
- return NULL;
- }
- DEBUGP (("Loaded %s (size %ld).\n", file, fm->length));
-
- head = tail = NULL;
- text = fm->content;
- text_end = fm->content + fm->length;
- while (text < text_end)
- {
- const char *line_beg = text;
- const char *line_end = memchr (text, '\n', text_end - text);
- if (!line_end)
- line_end = text_end;
- else
- ++line_end;
- text = line_end;
-
- /* Strip whitespace from the beginning and end of line. */
- while (line_beg < line_end && ISSPACE (*line_beg))
- ++line_beg;
- while (line_end > line_beg && ISSPACE (*(line_end - 1)))
- --line_end;
-
- if (line_end > line_beg)
- {
- /* URL is in the [line_beg, line_end) region. */
-
- int up_error_code;
- char *url_text;
- struct urlpos *entry;
- struct url *url;
-
- /* We must copy the URL to a zero-terminated string, and we
- can't use alloca because we're in a loop. *sigh*. */
- url_text = strdupdelim (line_beg, line_end);
-
- if (opt.base_href)
- {
- /* Merge opt.base_href with URL. */
- char *merged = uri_merge (opt.base_href, url_text);
- xfree (url_text);
- url_text = merged;
- }
-
- url = url_parse (url_text, &up_error_code);
- if (!url)
- {
- logprintf (LOG_NOTQUIET, "%s: Invalid URL %s: %s\n",
- file, url_text, url_error (up_error_code));
- xfree (url_text);
- continue;
- }
- xfree (url_text);
-
- entry = (struct urlpos *)xmalloc (sizeof (struct urlpos));
- memset (entry, 0, sizeof (*entry));
- entry->next = NULL;
- entry->url = url;
-
- if (!head)
- head = entry;
- else
- tail->next = entry;
- tail = entry;
- }
- }
- read_file_free (fm);
- return head;
-}
-\f
-/* Free the linked list of urlpos. */
-void
-free_urlpos (struct urlpos *l)
-{
- while (l)
- {
- struct urlpos *next = l->next;
- if (l->url)
- url_free (l->url);
- FREE_MAYBE (l->local_name);
- xfree (l);
- l = next;
- }
-}
-
-/* Rotate FNAME opt.backups times */
-void
-rotate_backups(const char *fname)
-{
- int maxlen = strlen (fname) + 1 + numdigit (opt.backups) + 1;
- char *from = (char *)alloca (maxlen);
- char *to = (char *)alloca (maxlen);
- struct stat sb;
- int i;
-
- if (stat (fname, &sb) == 0)
- if (S_ISREG (sb.st_mode) == 0)
- return;
-
- for (i = opt.backups; i > 1; i--)
- {
- sprintf (from, "%s.%d", fname, i - 1);
- sprintf (to, "%s.%d", fname, i);
- rename (from, to);
- }
-
- sprintf (to, "%s.%d", fname, 1);
- rename(fname, to);
-}
-
/* Create all the necessary directories for PATH (a file). Calls
- mkdirhier() internally. */
+ make_directory internally. */
int
mkalldirs (const char *path)
{
const char *p;
char *t;
- struct stat st;
+ struct_stat st;
int res;
p = path + strlen (path);
if ((stat (t, &st) == 0))
{
if (S_ISDIR (st.st_mode))
- {
- xfree (t);
- return 0;
- }
+ {
+ xfree (t);
+ return 0;
+ }
else
- {
- /* If the dir exists as a file name, remove it first. This
- is *only* for Wget to work with buggy old CERN http
- servers. Here is the scenario: When Wget tries to
- retrieve a directory without a slash, e.g.
- http://foo/bar (bar being a directory), CERN server will
- not redirect it too http://foo/bar/ -- it will generate a
- directory listing containing links to bar/file1,
- bar/file2, etc. Wget will lose because it saves this
- HTML listing to a file `bar', so it cannot create the
- directory. To work around this, if the file of the same
- name exists, we just remove it and create the directory
- anyway. */
- DEBUGP (("Removing %s because of directory danger!\n", t));
- unlink (t);
- }
+ {
+ /* If the dir exists as a file name, remove it first. This
+ is *only* for Wget to work with buggy old CERN http
+ servers. Here is the scenario: When Wget tries to
+ retrieve a directory without a slash, e.g.
+ http://foo/bar (bar being a directory), CERN server will
+ not redirect it too http://foo/bar/ -- it will generate a
+ directory listing containing links to bar/file1,
+ bar/file2, etc. Wget will lose because it saves this
+ HTML listing to a file `bar', so it cannot create the
+ directory. To work around this, if the file of the same
+ name exists, we just remove it and create the directory
+ anyway. */
+ DEBUGP (("Removing %s because of directory danger!\n", t));
+ unlink (t);
+ }
}
res = make_directory (t);
if (res != 0)
The idea is to have a convenient and efficient way to construct a
string by having various functions append data to it. Instead of
passing the obligatory BASEVAR, SIZEVAR and TAILPOS to all the
- functions in questions, we pass the pointer to this struct. */
+ functions in questions, we pass the pointer to this struct.
+
+ Functions that write to the members in this struct must make sure
+ that base remains null terminated by calling append_null().
+ */
struct growable {
char *base;
- int size;
- int tail;
+ int size; /* memory allocated */
+ int tail; /* string length */
};
/* Ensure that the string can accept APPEND_COUNT more characters past
the current TAIL position. If necessary, this will grow the string
and update its allocated size. If the string is already large
enough to take TAIL+APPEND_COUNT characters, this does nothing. */
-#define GROW(g, append_size) do { \
- struct growable *G_ = g; \
- DO_REALLOC (G_->base, G_->size, G_->tail + append_size, char); \
+#define GROW(g, append_size) do { \
+ struct growable *G_ = g; \
+ DO_REALLOC (G_->base, G_->size, G_->tail + append_size, char); \
} while (0)
/* Return the tail position of the string. */
/* Move the tail position by APPEND_COUNT characters. */
#define TAIL_INCR(r, append_count) ((r)->tail += append_count)
-/* Append the string STR to DEST. NOTICE: the string in DEST is not
- terminated. */
+/* Append NULL to DEST. */
static void
-append_string (const char *str, struct growable *dest)
+append_null (struct growable *dest)
{
- int l = strlen (str);
- GROW (dest, l);
- memcpy (TAIL (dest), str, l);
- TAIL_INCR (dest, l);
+ GROW (dest, 1);
+ *TAIL (dest) = 0;
}
-/* Append CH to DEST. For example, append_char (0, DEST)
- zero-terminates DEST. */
-
+/* Append CH to DEST. */
static void
append_char (char ch, struct growable *dest)
{
- GROW (dest, 1);
- *TAIL (dest) = ch;
- TAIL_INCR (dest, 1);
+ if (ch)
+ {
+ GROW (dest, 1);
+ *TAIL (dest) = ch;
+ TAIL_INCR (dest, 1);
+ }
+
+ append_null (dest);
+}
+
+/* Append the string STR to DEST. */
+static void
+append_string (const char *str, struct growable *dest)
+{
+ int l = strlen (str);
+
+ if (l)
+ {
+ GROW (dest, l);
+ memcpy (TAIL (dest), str, l);
+ TAIL_INCR (dest, l);
+ }
+
+ append_null (dest);
}
+
enum {
- filechr_not_unix = 1, /* unusable on Unix, / and \0 */
- filechr_not_windows = 2, /* unusable on Windows, one of \|/<>?:*" */
- filechr_control = 4, /* a control character, e.g. 0-31 */
+ filechr_not_unix = 1, /* unusable on Unix, / and \0 */
+ filechr_not_windows = 2, /* unusable on Windows, one of \|/<>?:*" */
+ filechr_control = 4 /* a control character, e.g. 0-31 */
};
-#define FILE_CHAR_TEST(c, mask) (filechr_table[(unsigned char)(c)] & (mask))
+#define FILE_CHAR_TEST(c, mask) \
+ ((opt.restrict_files_nonascii && !c_isascii ((unsigned char)(c))) || \
+ (filechr_table[(unsigned char)(c)] & (mask)))
/* Shorthands for the table: */
#define U filechr_not_unix
translate file name back to URL, this would become important
crucial. Right now, it's better to be minimal in escaping. */
-const static unsigned char filechr_table[256] =
+static const unsigned char filechr_table[256] =
{
UWC, C, C, C, C, C, C, C, /* NUL SOH STX ETX EOT ENQ ACK BEL */
C, C, C, C, C, C, C, C, /* BS HT LF VT FF CR SO SI */
0, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
0, 0, 0, 0, 0, 0, 0, 0, /* h i j k l m n o */
0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
- 0, 0, 0, 0, 0, 0, 0, 0, /* x y z { | } ~ DEL */
+ 0, 0, 0, 0, W, 0, 0, C, /* x y z { | } ~ DEL */
C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, /* 128-143 */
C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, /* 144-159 */
query, normally '?'. Since Windows cannot handle '?' as part of
file name, we use '@' instead there. */
#define FN_QUERY_SEP (opt.restrict_files_os != restrict_windows ? '?' : '@')
+#define FN_QUERY_SEP_STR (opt.restrict_files_os != restrict_windows ? "?" : "@")
/* Quote path element, characters in [b, e), as file name, and append
the quoted string to DEST. Each character is quoted as per
- file_unsafe_char and the corresponding table. */
+ file_unsafe_char and the corresponding table.
+
+ If ESCAPED is true, the path element is considered to be
+ URL-escaped and will be unescaped prior to inspection. */
static void
-append_uri_pathel (const char *b, const char *e, struct growable *dest)
+append_uri_pathel (const char *b, const char *e, bool escaped,
+ struct growable *dest)
{
- char *pathel;
- int pathlen;
-
const char *p;
int quoted, outlen;
mask |= filechr_control;
/* Copy [b, e) to PATHEL and URL-unescape it. */
- BOUNDED_TO_ALLOCA (b, e, pathel);
- url_unescape (pathel);
- pathlen = strlen (pathel);
+ if (escaped)
+ {
+ char *unescaped;
+ BOUNDED_TO_ALLOCA (b, e, unescaped);
+ url_unescape (unescaped);
+ b = unescaped;
+ e = unescaped + strlen (unescaped);
+ }
- /* Go through PATHEL and check how many characters we'll need to
- add for file quoting. */
+ /* Defang ".." when found as component of path. Remember that path
+ comes from the URL and might contain malicious input. */
+ if (e - b == 2 && b[0] == '.' && b[1] == '.')
+ {
+ b = "%2E%2E";
+ e = b + 6;
+ }
+
+ /* Walk the PATHEL string and check how many characters we'll need
+ to quote. */
quoted = 0;
- for (p = pathel; *p; p++)
+ for (p = b; p < e; p++)
if (FILE_CHAR_TEST (*p, mask))
++quoted;
- /* p - pathel is the string length. Each quoted char means two
- additional characters in the string, hence 2*quoted. */
- outlen = (p - pathel) + (2 * quoted);
+ /* Calculate the length of the output string. e-b is the input
+ string length. Each quoted char introduces two additional
+ characters in the string, hence 2*quoted. */
+ outlen = (e - b) + (2 * quoted);
GROW (dest, outlen);
if (!quoted)
{
- /* If there's nothing to quote, we don't need to go through the
- string the second time. */
- memcpy (TAIL (dest), pathel, outlen);
+ /* If there's nothing to quote, we can simply append the string
+ without processing it again. */
+ memcpy (TAIL (dest), b, outlen);
}
else
{
char *q = TAIL (dest);
- for (p = pathel; *p; p++)
- {
- if (!FILE_CHAR_TEST (*p, mask))
- *q++ = *p;
- else
- {
- unsigned char ch = *p;
- *q++ = '%';
- *q++ = XNUM_TO_DIGIT (ch >> 4);
- *q++ = XNUM_TO_DIGIT (ch & 0xf);
- }
- }
+ for (p = b; p < e; p++)
+ {
+ if (!FILE_CHAR_TEST (*p, mask))
+ *q++ = *p;
+ else
+ {
+ unsigned char ch = *p;
+ *q++ = '%';
+ *q++ = XNUM_TO_DIGIT (ch >> 4);
+ *q++ = XNUM_TO_DIGIT (ch & 0xf);
+ }
+ }
assert (q - TAIL (dest) == outlen);
}
+
+ /* Perform inline case transformation if required. */
+ if (opt.restrict_files_case == restrict_lowercase
+ || opt.restrict_files_case == restrict_uppercase)
+ {
+ char *q;
+ for (q = TAIL (dest); q < TAIL (dest) + outlen; ++q)
+ {
+ if (opt.restrict_files_case == restrict_lowercase)
+ *q = c_tolower (*q);
+ else
+ *q = c_toupper (*q);
+ }
+ }
+
TAIL_INCR (dest, outlen);
+ append_null (dest);
}
/* Append to DEST the directory structure that corresponds the
for (; (next = strchr (pathel, '/')) != NULL; pathel = next + 1)
{
if (cut-- > 0)
- continue;
+ continue;
if (pathel == next)
- /* Ignore empty pathels. path_simplify should remove
- occurrences of "//" from the path, but it has special cases
- for starting / which generates an empty pathel here. */
- continue;
+ /* Ignore empty pathels. */
+ continue;
if (dest->tail)
- append_char ('/', dest);
- append_uri_pathel (pathel, next, dest);
+ append_char ('/', dest);
+ append_uri_pathel (pathel, next, true, dest);
}
}
-/* Return a unique file name that matches the given URL as good as
+/* Return a unique file name that matches the given URL as well as
possible. Does not create directories on the file system. */
char *
-url_file_name (const struct url *u)
+url_file_name (const struct url *u, char *replaced_filename)
{
- struct growable fnres;
+ struct growable fnres; /* stands for "file name result" */
+ struct growable temp_fnres;
- char *u_file, *u_query;
- char *fname, *unique;
+ const char *u_file;
+ char *fname, *unique, *fname_len_check;
+ const char *index_filename = "index.html"; /* The default index file is index.html */
+ size_t max_length;
fnres.base = NULL;
fnres.size = 0;
fnres.tail = 0;
+ temp_fnres.base = NULL;
+ temp_fnres.size = 0;
+ temp_fnres.tail = 0;
+
+ /* If an alternative index file was defined, change index_filename */
+ if (opt.default_page)
+ index_filename = opt.default_page;
+
+
/* Start with the directory prefix, if specified. */
if (opt.dir_prefix)
append_string (opt.dir_prefix, &fnres);
directory structure. */
if (opt.dirstruct)
{
+ if (opt.protocol_directories)
+ {
+ if (fnres.tail)
+ append_char ('/', &fnres);
+ append_string (supported_schemes[u->scheme].name, &fnres);
+ }
if (opt.add_hostdir)
- {
- if (fnres.tail)
- append_char ('/', &fnres);
- append_string (u->host, &fnres);
- if (u->port != scheme_default_port (u->scheme))
- {
- char portstr[24];
- number_to_string (portstr, u->port);
- append_char (FN_PORT_SEP, &fnres);
- append_string (portstr, &fnres);
- }
- }
+ {
+ if (fnres.tail)
+ append_char ('/', &fnres);
+ if (0 != strcmp (u->host, ".."))
+ append_string (u->host, &fnres);
+ else
+ /* Host name can come from the network; malicious DNS may
+ allow ".." to be resolved, causing us to write to
+ "../<file>". Defang such host names. */
+ append_string ("%2E%2E", &fnres);
+ if (u->port != scheme_default_port (u->scheme))
+ {
+ char portstr[24];
+ number_to_string (portstr, u->port);
+ append_char (FN_PORT_SEP, &fnres);
+ append_string (portstr, &fnres);
+ }
+ }
append_dir_structure (u, &fnres);
}
- /* Add the file name. */
- if (fnres.tail)
- append_char ('/', &fnres);
- u_file = *u->file ? u->file : "index.html";
- append_uri_pathel (u_file, u_file + strlen (u_file), &fnres);
+ if (!replaced_filename)
+ {
+ /* Create the filename. */
+ u_file = *u->file ? u->file : index_filename;
- /* Append "?query" to the file name. */
- u_query = u->query && *u->query ? u->query : NULL;
- if (u_query)
+ /* Append "?query" to the file name, even if empty,
+ * and create fname_len_check. */
+ if (u->query)
+ fname_len_check = concat_strings (u_file, FN_QUERY_SEP_STR, u->query, NULL);
+ else
+ fname_len_check = strdupdelim (u_file, u_file + strlen (u_file));
+ }
+ else
+ {
+ u_file = replaced_filename;
+ fname_len_check = strdupdelim (u_file, u_file + strlen (u_file));
+ }
+
+ append_uri_pathel (fname_len_check,
+ fname_len_check + strlen (fname_len_check), false, &temp_fnres);
+
+ /* Zero-terminate the temporary file name. */
+ append_char ('\0', &temp_fnres);
+
+ /* Check that the length of the file name is acceptable. */
+#ifdef WINDOWS
+ if (MAX_PATH > (fnres.tail + CHOMP_BUFFER + 2))
+ {
+ max_length = MAX_PATH - (fnres.tail + CHOMP_BUFFER + 2);
+ /* FIXME: In Windows a filename is usually limited to 255 characters.
+ To really be accurate you could call GetVolumeInformation() to get
+ lpMaximumComponentLength
+ */
+ if (max_length > 255)
+ {
+ max_length = 255;
+ }
+ }
+ else
+ {
+ max_length = 0;
+ }
+#else
+ max_length = get_max_length (fnres.base, fnres.tail, _PC_NAME_MAX) - CHOMP_BUFFER;
+#endif
+ if (max_length > 0 && strlen (temp_fnres.base) > max_length)
{
- append_char (FN_QUERY_SEP, &fnres);
- append_uri_pathel (u_query, u_query + strlen (u_query), &fnres);
+ logprintf (LOG_NOTQUIET, "The name is too long, %lu chars total.\n",
+ (unsigned long) strlen (temp_fnres.base));
+ logprintf (LOG_NOTQUIET, "Trying to shorten...\n");
+
+ /* Shorten the file name. */
+ temp_fnres.base[max_length] = '\0';
+
+ logprintf (LOG_NOTQUIET, "New name is %s.\n", temp_fnres.base);
}
- /* Zero-terminate the file name. */
- append_char ('\0', &fnres);
+ free (fname_len_check);
+
+ /* The filename has already been 'cleaned' by append_uri_pathel() above. So,
+ * just append it. */
+ if (fnres.tail)
+ append_char ('/', &fnres);
+ append_string (temp_fnres.base, &fnres);
fname = fnres.base;
+ /* Make a final check that the path length is acceptable? */
+ /* TODO: check fnres.base for path length problem */
+
+ free (temp_fnres.base);
+
/* Check the cases in which the unique extensions are not used:
1) Clobbering is turned off (-nc).
2) Retrieval with regetting.
3) Timestamping is used.
4) Hierarchy is built.
+ 5) Backups are specified.
The exception is the case when file does exist and is a
directory (see `mkalldirs' for explanation). */
- if ((opt.noclobber || opt.always_rest || opt.timestamping || opt.dirstruct)
+ if (ALLOW_CLOBBER
&& !(file_exists_p (fname) && !file_non_directory_p (fname)))
- return fname;
+ {
+ unique = fname;
+ }
+ else
+ {
+ unique = unique_name (fname, true);
+ if (unique != fname)
+ xfree (fname);
+ }
- unique = unique_name (fname, 1);
- if (unique != fname)
- xfree (fname);
- return unique;
-}
+/* On VMS, alter the name as required. */
+#ifdef __VMS
+ {
+ char *unique2;
-/* Return the length of URL's path. Path is considered to be
- terminated by one of '?', ';', '#', or by the end of the
- string. */
-static int
-path_length (const char *url)
-{
- const char *q = strpbrk_or_eos (url, "?;#");
- return q - url;
-}
+ unique2 = ods_conform( unique);
+ if (unique2 != unique)
+ {
+ xfree (unique);
+ unique = unique2;
+ }
+ }
+#endif /* def __VMS */
-/* Find the last occurrence of character C in the range [b, e), or
- NULL, if none are present. This is equivalent to strrchr(b, c),
- except that it accepts an END argument instead of requiring the
- string to be zero-terminated. Why is there no memrchr()? */
-static const char *
-find_last_char (const char *b, const char *e, char c)
-{
- for (; e > b; e--)
- if (*e == c)
- return e;
- return NULL;
+ return unique;
}
\f
/* Resolve "." and ".." elements of PATH by destructively modifying
- PATH. "." is resolved by removing that path element, and ".." is
- resolved by removing the preceding path element. Leading and
- trailing slashes are preserved.
+ PATH and return true if PATH has been modified, false otherwise.
- Return non-zero if any changes have been made.
+ The algorithm is in spirit similar to the one described in rfc1808,
+ although implemented differently, in one pass. To recap, path
+ elements containing only "." are removed, and ".." is taken to mean
+ "back up one element". Single leading and trailing slashes are
+ preserved.
For example, "a/b/c/./../d/.." will yield "a/b/". More exhaustive
test examples are provided below. If you change anything in this
function, run test_path_simplify to make sure you haven't broken a
- test case.
-
- A previous version of this function was based on path_simplify()
- from GNU Bash, but it has been rewritten for Wget 1.8.1. */
+ test case. */
-static int
-path_simplify (char *path)
+static bool
+path_simplify (enum url_scheme scheme, char *path)
{
- int change = 0;
- char *p, *end;
-
- if (path[0] == '/')
- ++path; /* preserve the leading '/'. */
+ char *h = path; /* hare */
+ char *t = path; /* tortoise */
+ char *beg = path;
+ char *end = strchr (path, '\0');
- p = path;
- end = p + strlen (p) + 1; /* position past the terminating zero. */
-
- while (1)
+ while (h < end)
{
- again:
- /* P should point to the beginning of a path element. */
-
- if (*p == '.' && (*(p + 1) == '/' || *(p + 1) == '\0'))
- {
- /* Handle "./foo" by moving "foo" two characters to the
- left. */
- if (*(p + 1) == '/')
- {
- change = 1;
- memmove (p, p + 2, end - p);
- end -= 2;
- goto again;
- }
- else
- {
- change = 1;
- *p = '\0';
- break;
- }
- }
- else if (*p == '.' && *(p + 1) == '.'
- && (*(p + 2) == '/' || *(p + 2) == '\0'))
- {
- /* Handle "../foo" by moving "foo" one path element to the
- left. */
- char *b = p; /* not p-1 because P can equal PATH */
-
- /* Backtrack by one path element, but not past the beginning
- of PATH. */
-
- /* foo/bar/../baz */
- /* ^ p */
- /* ^ b */
-
- if (b > path)
- {
- /* Move backwards until B hits the beginning of the
- previous path element or the beginning of path. */
- for (--b; b > path && *(b - 1) != '/'; b--)
- ;
- }
-
- change = 1;
- if (*(p + 2) == '/')
- {
- memmove (b, p + 3, end - (p + 3));
- end -= (p + 3) - b;
- p = b;
- }
- else
- {
- *b = '\0';
- break;
- }
-
- goto again;
- }
- else if (*p == '/')
- {
- /* Remove empty path elements. Not mandated by rfc1808 et
- al, but it seems like a good idea to get rid of them.
- Supporting them properly is hard (in which directory do
- you save http://x.com///y.html?) and they don't seem to
- bring much gain. */
- char *q = p;
- while (*q == '/')
- ++q;
- change = 1;
- if (*q == '\0')
- {
- *p = '\0';
- break;
- }
- memmove (p, q, end - q);
- end -= q - p;
- goto again;
- }
-
- /* Skip to the next path element. */
- while (*p && *p != '/')
- ++p;
- if (*p == '\0')
- break;
-
- /* Make sure P points to the beginning of the next path element,
- which is location after the slash. */
- ++p;
- }
-
- return change;
+ /* Hare should be at the beginning of a path element. */
+
+ if (h[0] == '.' && (h[1] == '/' || h[1] == '\0'))
+ {
+ /* Ignore "./". */
+ h += 2;
+ }
+ else if (h[0] == '.' && h[1] == '.' && (h[2] == '/' || h[2] == '\0'))
+ {
+ /* Handle "../" by retreating the tortoise by one path
+ element -- but not past beggining. */
+ if (t > beg)
+ {
+ /* Move backwards until T hits the beginning of the
+ previous path element or the beginning of path. */
+ for (--t; t > beg && t[-1] != '/'; t--)
+ ;
+ }
+ else if (scheme == SCHEME_FTP)
+ {
+ /* If we're at the beginning, copy the "../" literally
+ and move the beginning so a later ".." doesn't remove
+ it. This violates RFC 3986; but we do it for FTP
+ anyway because there is otherwise no way to get at a
+ parent directory, when the FTP server drops us in a
+ non-root directory (which is not uncommon). */
+ beg = t + 3;
+ goto regular;
+ }
+ h += 3;
+ }
+ else
+ {
+ regular:
+ /* A regular path element. If H hasn't advanced past T,
+ simply skip to the next path element. Otherwise, copy
+ the path element until the next slash. */
+ if (t == h)
+ {
+ /* Skip the path element, including the slash. */
+ while (h < end && *h != '/')
+ t++, h++;
+ if (h < end)
+ t++, h++;
+ }
+ else
+ {
+ /* Copy the path element, including the final slash. */
+ while (h < end && *h != '/')
+ *t++ = *h++;
+ if (h < end)
+ *t++ = *h++;
+ }
+ }
+ }
+
+ if (t != h)
+ *t = '\0';
+
+ return t != h;
}
\f
-/* Resolve the result of "linking" a base URI (BASE) to a
- link-specified URI (LINK).
+/* Return the length of URL's path. Path is considered to be
+ terminated by one or more of the ?query or ;params or #fragment,
+ depending on the scheme. */
+
+static const char *
+path_end (const char *url)
+{
+ enum url_scheme scheme = url_scheme (url);
+ const char *seps;
+ if (scheme == SCHEME_INVALID)
+ scheme = SCHEME_HTTP; /* use http semantics for rel links */
+ /* +2 to ignore the first two separators ':' and '/' */
+ seps = init_seps (scheme) + 2;
+ return strpbrk_or_eos (url, seps);
+}
+
+/* Find the last occurrence of character C in the range [b, e), or
+ NULL, if none are present. */
+#define find_last_char(b, e, c) memrchr ((b), (c), (e) - (b))
+
+/* Merge BASE with LINK and return the resulting URI.
Either of the URIs may be absolute or relative, complete with the
- host name, or path only. This tries to behave "reasonably" in all
- foreseeable cases. It employs little specific knowledge about
- schemes or URL-specific stuff -- it just works on strings.
+ host name, or path only. This tries to reasonably handle all
+ foreseeable cases. It only employs minimal URL parsing, without
+ knowledge of the specifics of schemes.
- The parameters LINKLENGTH is useful if LINK is not zero-terminated.
- See uri_merge for a gentler interface to this functionality.
+ I briefly considered making this function call path_simplify after
+ the merging process, as rfc1738 seems to suggest. This is a bad
+ idea for several reasons: 1) it complexifies the code, and 2)
+ url_parse has to simplify path anyway, so it's wasteful to boot. */
- Perhaps this function should call path_simplify so that the callers
- don't have to call url_parse unconditionally. */
-static char *
-uri_merge_1 (const char *base, const char *link, int linklength, int no_scheme)
+char *
+uri_merge (const char *base, const char *link)
{
- char *constr;
+ int linklength;
+ const char *end;
+ char *merge;
+
+ if (url_has_scheme (link))
+ return xstrdup (link);
+
+ /* We may not examine BASE past END. */
+ end = path_end (base);
+ linklength = strlen (link);
- if (no_scheme)
+ if (!*link)
{
- const char *end = base + path_length (base);
-
- if (!*link)
- {
- /* Empty LINK points back to BASE, query string and all. */
- constr = xstrdup (base);
- }
- else if (*link == '?')
- {
- /* LINK points to the same location, but changes the query
- string. Examples: */
- /* uri_merge("path", "?new") -> "path?new" */
- /* uri_merge("path?foo", "?new") -> "path?new" */
- /* uri_merge("path?foo#bar", "?new") -> "path?new" */
- /* uri_merge("path#foo", "?new") -> "path?new" */
- int baselength = end - base;
- constr = xmalloc (baselength + linklength + 1);
- memcpy (constr, base, baselength);
- memcpy (constr + baselength, link, linklength);
- constr[baselength + linklength] = '\0';
- }
- else if (*link == '#')
- {
- /* uri_merge("path", "#new") -> "path#new" */
- /* uri_merge("path#foo", "#new") -> "path#new" */
- /* uri_merge("path?foo", "#new") -> "path?foo#new" */
- /* uri_merge("path?foo#bar", "#new") -> "path?foo#new" */
- int baselength;
- const char *end1 = strchr (base, '#');
- if (!end1)
- end1 = base + strlen (base);
- baselength = end1 - base;
- constr = xmalloc (baselength + linklength + 1);
- memcpy (constr, base, baselength);
- memcpy (constr + baselength, link, linklength);
- constr[baselength + linklength] = '\0';
- }
- else if (linklength > 1 && *link == '/' && *(link + 1) == '/')
- {
- /* LINK begins with "//" and so is a net path: we need to
- replace everything after (and including) the double slash
- with LINK. */
-
- /* uri_merge("foo", "//new/bar") -> "//new/bar" */
- /* uri_merge("//old/foo", "//new/bar") -> "//new/bar" */
- /* uri_merge("http://old/foo", "//new/bar") -> "http://new/bar" */
-
- int span;
- const char *slash;
- const char *start_insert;
-
- /* Look for first slash. */
- slash = memchr (base, '/', end - base);
- /* If found slash and it is a double slash, then replace
- from this point, else default to replacing from the
- beginning. */
- if (slash && *(slash + 1) == '/')
- start_insert = slash;
- else
- start_insert = base;
-
- span = start_insert - base;
- constr = (char *)xmalloc (span + linklength + 1);
- if (span)
- memcpy (constr, base, span);
- memcpy (constr + span, link, linklength);
- constr[span + linklength] = '\0';
- }
- else if (*link == '/')
- {
- /* LINK is an absolute path: we need to replace everything
- after (and including) the FIRST slash with LINK.
-
- So, if BASE is "http://host/whatever/foo/bar", and LINK is
- "/qux/xyzzy", our result should be
- "http://host/qux/xyzzy". */
- int span;
- const char *slash;
- const char *start_insert = NULL; /* for gcc to shut up. */
- const char *pos = base;
- int seen_slash_slash = 0;
- /* We're looking for the first slash, but want to ignore
- double slash. */
- again:
- slash = memchr (pos, '/', end - pos);
- if (slash && !seen_slash_slash)
- if (*(slash + 1) == '/')
- {
- pos = slash + 2;
- seen_slash_slash = 1;
- goto again;
- }
-
- /* At this point, SLASH is the location of the first / after
- "//", or the first slash altogether. START_INSERT is the
- pointer to the location where LINK will be inserted. When
- examining the last two examples, keep in mind that LINK
- begins with '/'. */
-
- if (!slash && !seen_slash_slash)
- /* example: "foo" */
- /* ^ */
- start_insert = base;
- else if (!slash && seen_slash_slash)
- /* example: "http://foo" */
- /* ^ */
- start_insert = end;
- else if (slash && !seen_slash_slash)
- /* example: "foo/bar" */
- /* ^ */
- start_insert = base;
- else if (slash && seen_slash_slash)
- /* example: "http://something/" */
- /* ^ */
- start_insert = slash;
-
- span = start_insert - base;
- constr = (char *)xmalloc (span + linklength + 1);
- if (span)
- memcpy (constr, base, span);
- if (linklength)
- memcpy (constr + span, link, linklength);
- constr[span + linklength] = '\0';
- }
+ /* Empty LINK points back to BASE, query string and all. */
+ return xstrdup (base);
+ }
+ else if (*link == '?')
+ {
+ /* LINK points to the same location, but changes the query
+ string. Examples: */
+ /* uri_merge("path", "?new") -> "path?new" */
+ /* uri_merge("path?foo", "?new") -> "path?new" */
+ /* uri_merge("path?foo#bar", "?new") -> "path?new" */
+ /* uri_merge("path#foo", "?new") -> "path?new" */
+ int baselength = end - base;
+ merge = xmalloc (baselength + linklength + 1);
+ memcpy (merge, base, baselength);
+ memcpy (merge + baselength, link, linklength);
+ merge[baselength + linklength] = '\0';
+ }
+ else if (*link == '#')
+ {
+ /* uri_merge("path", "#new") -> "path#new" */
+ /* uri_merge("path#foo", "#new") -> "path#new" */
+ /* uri_merge("path?foo", "#new") -> "path?foo#new" */
+ /* uri_merge("path?foo#bar", "#new") -> "path?foo#new" */
+ int baselength;
+ const char *end1 = strchr (base, '#');
+ if (!end1)
+ end1 = base + strlen (base);
+ baselength = end1 - base;
+ merge = xmalloc (baselength + linklength + 1);
+ memcpy (merge, base, baselength);
+ memcpy (merge + baselength, link, linklength);
+ merge[baselength + linklength] = '\0';
+ }
+ else if (*link == '/' && *(link + 1) == '/')
+ {
+ /* LINK begins with "//" and so is a net path: we need to
+ replace everything after (and including) the double slash
+ with LINK. */
+
+ /* uri_merge("foo", "//new/bar") -> "//new/bar" */
+ /* uri_merge("//old/foo", "//new/bar") -> "//new/bar" */
+ /* uri_merge("http://old/foo", "//new/bar") -> "http://new/bar" */
+
+ int span;
+ const char *slash;
+ const char *start_insert;
+
+ /* Look for first slash. */
+ slash = memchr (base, '/', end - base);
+ /* If found slash and it is a double slash, then replace
+ from this point, else default to replacing from the
+ beginning. */
+ if (slash && *(slash + 1) == '/')
+ start_insert = slash;
else
- {
- /* LINK is a relative URL: we need to replace everything
- after last slash (possibly empty) with LINK.
-
- So, if BASE is "whatever/foo/bar", and LINK is "qux/xyzzy",
- our result should be "whatever/foo/qux/xyzzy". */
- int need_explicit_slash = 0;
- int span;
- const char *start_insert;
- const char *last_slash = find_last_char (base, end, '/');
- if (!last_slash)
- {
- /* No slash found at all. Append LINK to what we have,
- but we'll need a slash as a separator.
-
- Example: if base == "foo" and link == "qux/xyzzy", then
- we cannot just append link to base, because we'd get
- "fooqux/xyzzy", whereas what we want is
- "foo/qux/xyzzy".
-
- To make sure the / gets inserted, we set
- need_explicit_slash to 1. We also set start_insert
- to end + 1, so that the length calculations work out
- correctly for one more (slash) character. Accessing
- that character is fine, since it will be the
- delimiter, '\0' or '?'. */
- /* example: "foo?..." */
- /* ^ ('?' gets changed to '/') */
- start_insert = end + 1;
- need_explicit_slash = 1;
- }
- else if (last_slash && last_slash != base && *(last_slash - 1) == '/')
- {
- /* example: http://host" */
- /* ^ */
- start_insert = end + 1;
- need_explicit_slash = 1;
- }
- else
- {
- /* example: "whatever/foo/bar" */
- /* ^ */
- start_insert = last_slash + 1;
- }
-
- span = start_insert - base;
- constr = (char *)xmalloc (span + linklength + 1);
- if (span)
- memcpy (constr, base, span);
- if (need_explicit_slash)
- constr[span - 1] = '/';
- if (linklength)
- memcpy (constr + span, link, linklength);
- constr[span + linklength] = '\0';
- }
+ start_insert = base;
+
+ span = start_insert - base;
+ merge = xmalloc (span + linklength + 1);
+ if (span)
+ memcpy (merge, base, span);
+ memcpy (merge + span, link, linklength);
+ merge[span + linklength] = '\0';
}
- else /* !no_scheme */
+ else if (*link == '/')
{
- constr = strdupdelim (link, link + linklength);
+ /* LINK is an absolute path: we need to replace everything
+ after (and including) the FIRST slash with LINK.
+
+ So, if BASE is "http://host/whatever/foo/bar", and LINK is
+ "/qux/xyzzy", our result should be
+ "http://host/qux/xyzzy". */
+ int span;
+ const char *slash;
+ const char *start_insert = NULL; /* for gcc to shut up. */
+ const char *pos = base;
+ bool seen_slash_slash = false;
+ /* We're looking for the first slash, but want to ignore
+ double slash. */
+ again:
+ slash = memchr (pos, '/', end - pos);
+ if (slash && !seen_slash_slash)
+ if (*(slash + 1) == '/')
+ {
+ pos = slash + 2;
+ seen_slash_slash = true;
+ goto again;
+ }
+
+ /* At this point, SLASH is the location of the first / after
+ "//", or the first slash altogether. START_INSERT is the
+ pointer to the location where LINK will be inserted. When
+ examining the last two examples, keep in mind that LINK
+ begins with '/'. */
+
+ if (!slash && !seen_slash_slash)
+ /* example: "foo" */
+ /* ^ */
+ start_insert = base;
+ else if (!slash && seen_slash_slash)
+ /* example: "http://foo" */
+ /* ^ */
+ start_insert = end;
+ else if (slash && !seen_slash_slash)
+ /* example: "foo/bar" */
+ /* ^ */
+ start_insert = base;
+ else if (slash && seen_slash_slash)
+ /* example: "http://something/" */
+ /* ^ */
+ start_insert = slash;
+
+ span = start_insert - base;
+ merge = xmalloc (span + linklength + 1);
+ if (span)
+ memcpy (merge, base, span);
+ memcpy (merge + span, link, linklength);
+ merge[span + linklength] = '\0';
}
- return constr;
-}
-
-/* Merge BASE with LINK and return the resulting URI. This is an
- interface to uri_merge_1 that assumes that LINK is a
- zero-terminated string. */
-char *
-uri_merge (const char *base, const char *link)
-{
- return uri_merge_1 (base, link, strlen (link), !url_has_scheme (link));
+ else
+ {
+ /* LINK is a relative URL: we need to replace everything
+ after last slash (possibly empty) with LINK.
+
+ So, if BASE is "whatever/foo/bar", and LINK is "qux/xyzzy",
+ our result should be "whatever/foo/qux/xyzzy". */
+ bool need_explicit_slash = false;
+ int span;
+ const char *start_insert;
+ const char *last_slash = find_last_char (base, end, '/');
+ if (!last_slash)
+ {
+ /* No slash found at all. Replace what we have with LINK. */
+ start_insert = base;
+ }
+ else if (last_slash && last_slash >= base + 2
+ && last_slash[-2] == ':' && last_slash[-1] == '/')
+ {
+ /* example: http://host" */
+ /* ^ */
+ start_insert = end + 1;
+ need_explicit_slash = true;
+ }
+ else
+ {
+ /* example: "whatever/foo/bar" */
+ /* ^ */
+ start_insert = last_slash + 1;
+ }
+
+ span = start_insert - base;
+ merge = xmalloc (span + linklength + 1);
+ if (span)
+ memcpy (merge, base, span);
+ if (need_explicit_slash)
+ merge[span - 1] = '/';
+ memcpy (merge + span, link, linklength);
+ merge[span + linklength] = '\0';
+ }
+
+ return merge;
}
\f
-#define APPEND(p, s) do { \
- int len = strlen (s); \
- memcpy (p, s, len); \
- p += len; \
+#define APPEND(p, s) do { \
+ int len = strlen (s); \
+ memcpy (p, s, len); \
+ p += len; \
} while (0)
/* Use this instead of password when the actual password is supposed
/* Recreate the URL string from the data in URL.
- If HIDE is non-zero (as it is when we're calling this on a URL we
- plan to print, but not when calling it to canonicalize a URL for
- use within the program), password will be hidden. Unsafe
- characters in the URL will be quoted. */
+ If HIDE is true (as it is when we're calling this on a URL we plan
+ to print, but not when calling it to canonicalize a URL for use
+ within the program), password will be hidden. Unsafe characters in
+ the URL will be quoted. */
char *
-url_string (const struct url *url, int hide_password)
+url_string (const struct url *url, enum url_auth_mode auth_mode)
{
int size;
char *result, *p;
- char *quoted_user = NULL, *quoted_passwd = NULL;
+ char *quoted_host, *quoted_user = NULL, *quoted_passwd = NULL;
- int scheme_port = supported_schemes[url->scheme].default_port;
- char *scheme_str = supported_schemes[url->scheme].leading_string;
+ int scheme_port = supported_schemes[url->scheme].default_port;
+ const char *scheme_str = supported_schemes[url->scheme].leading_string;
int fplen = full_path_length (url);
- int brackets_around_host = 0;
+ bool brackets_around_host;
assert (scheme_str != NULL);
/* Make sure the user name and password are quoted. */
if (url->user)
{
- quoted_user = url_escape_allow_passthrough (url->user);
- if (url->passwd)
- {
- if (hide_password)
- quoted_passwd = HIDDEN_PASSWORD;
- else
- quoted_passwd = url_escape_allow_passthrough (url->passwd);
- }
- }
-
- if (strchr (url->host, ':'))
- brackets_around_host = 1;
+ if (auth_mode != URL_AUTH_HIDE)
+ {
+ quoted_user = url_escape_allow_passthrough (url->user);
+ if (url->passwd)
+ {
+ if (auth_mode == URL_AUTH_HIDE_PASSWD)
+ quoted_passwd = (char *) HIDDEN_PASSWORD;
+ else
+ quoted_passwd = url_escape_allow_passthrough (url->passwd);
+ }
+ }
+ }
+
+ /* In the unlikely event that the host name contains non-printable
+ characters, quote it for displaying to the user. */
+ quoted_host = url_escape_allow_passthrough (url->host);
+
+ /* Undo the quoting of colons that URL escaping performs. IPv6
+ addresses may legally contain colons, and in that case must be
+ placed in square brackets. */
+ if (quoted_host != url->host)
+ unescape_single_char (quoted_host, ':');
+ brackets_around_host = strchr (quoted_host, ':') != NULL;
size = (strlen (scheme_str)
- + strlen (url->host)
- + (brackets_around_host ? 2 : 0)
- + fplen
- + 1);
+ + strlen (quoted_host)
+ + (brackets_around_host ? 2 : 0)
+ + fplen
+ + 1);
if (url->port != scheme_port)
size += 1 + numdigit (url->port);
if (quoted_user)
{
size += 1 + strlen (quoted_user);
if (quoted_passwd)
- size += 1 + strlen (quoted_passwd);
+ size += 1 + strlen (quoted_passwd);
}
p = result = xmalloc (size);
{
APPEND (p, quoted_user);
if (quoted_passwd)
- {
- *p++ = ':';
- APPEND (p, quoted_passwd);
- }
+ {
+ *p++ = ':';
+ APPEND (p, quoted_passwd);
+ }
*p++ = '@';
}
if (brackets_around_host)
*p++ = '[';
- APPEND (p, url->host);
+ APPEND (p, quoted_host);
if (brackets_around_host)
*p++ = ']';
if (url->port != scheme_port)
if (quoted_user && quoted_user != url->user)
xfree (quoted_user);
- if (quoted_passwd && !hide_password
+ if (quoted_passwd && auth_mode == URL_AUTH_SHOW
&& quoted_passwd != url->passwd)
xfree (quoted_passwd);
+ if (quoted_host != url->host)
+ xfree (quoted_host);
return result;
}
\f
-/* Return the URL of the proxy appropriate for url U. */
-char *
-getproxy (struct url *u)
-{
- char *proxy = NULL;
- char *rewritten_url;
- static char rewritten_storage[1024];
-
- if (!opt.use_proxy)
- return NULL;
- if (!no_proxy_match (u->host, (const char **)opt.no_proxy))
- return NULL;
+/* Return true if scheme a is similar to scheme b.
- switch (u->scheme)
- {
- case SCHEME_HTTP:
- proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
- break;
+ Schemes are similar if they are equal. If SSL is supported, schemes
+ are also similar if one is http (SCHEME_HTTP) and the other is https
+ (SCHEME_HTTPS). */
+bool
+schemes_are_similar_p (enum url_scheme a, enum url_scheme b)
+{
+ if (a == b)
+ return true;
#ifdef HAVE_SSL
- case SCHEME_HTTPS:
- proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
- break;
+ if ((a == SCHEME_HTTP && b == SCHEME_HTTPS)
+ || (a == SCHEME_HTTPS && b == SCHEME_HTTP))
+ return true;
#endif
- case SCHEME_FTP:
- proxy = opt.ftp_proxy ? opt.ftp_proxy : getenv ("ftp_proxy");
- break;
- case SCHEME_INVALID:
- break;
- }
- if (!proxy || !*proxy)
- return NULL;
-
- /* Handle shorthands. `rewritten_storage' is a kludge to allow
- getproxy() to return static storage. */
- rewritten_url = rewrite_shorthand_url (proxy);
- if (rewritten_url)
- {
- strncpy (rewritten_storage, rewritten_url, sizeof(rewritten_storage));
- rewritten_storage[sizeof (rewritten_storage) - 1] = '\0';
- proxy = rewritten_storage;
- }
-
- return proxy;
-}
-
-/* Should a host be accessed through proxy, concerning no_proxy? */
-int
-no_proxy_match (const char *host, const char **no_proxy)
-{
- if (!no_proxy)
- return 1;
- else
- return !sufmatch (no_proxy, host);
-}
-\f
-/* Support for converting links for local viewing in downloaded HTML
- files. This should be moved to another file, because it has
- nothing to do with processing URLs. */
-
-static void write_backup_file PARAMS ((const char *, downloaded_file_t));
-static const char *replace_attr PARAMS ((const char *, int, FILE *,
- const char *));
-static const char *replace_attr_refresh_hack PARAMS ((const char *, int, FILE *,
- const char *, int));
-static char *local_quote_string PARAMS ((const char *));
-
-/* Change the links in one HTML file. LINKS is a list of links in the
- document, along with their positions and the desired direction of
- the conversion. */
-void
-convert_links (const char *file, struct urlpos *links)
-{
- struct file_memory *fm;
- FILE *fp;
- const char *p;
- downloaded_file_t downloaded_file_return;
-
- struct urlpos *link;
- int to_url_count = 0, to_file_count = 0;
-
- logprintf (LOG_VERBOSE, _("Converting %s... "), file);
-
- {
- /* First we do a "dry run": go through the list L and see whether
- any URL needs to be converted in the first place. If not, just
- leave the file alone. */
- int dry_count = 0;
- struct urlpos *dry = links;
- for (dry = links; dry; dry = dry->next)
- if (dry->convert != CO_NOCONVERT)
- ++dry_count;
- if (!dry_count)
- {
- logputs (LOG_VERBOSE, _("nothing to do.\n"));
- return;
- }
- }
-
- fm = read_file (file);
- if (!fm)
- {
- logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
- file, strerror (errno));
- return;
- }
-
- downloaded_file_return = downloaded_file (CHECK_FOR_FILE, file);
- if (opt.backup_converted && downloaded_file_return)
- write_backup_file (file, downloaded_file_return);
-
- /* Before opening the file for writing, unlink the file. This is
- important if the data in FM is mmaped. In such case, nulling the
- file, which is what fopen() below does, would make us read all
- zeroes from the mmaped region. */
- if (unlink (file) < 0 && errno != ENOENT)
- {
- logprintf (LOG_NOTQUIET, _("Unable to delete `%s': %s\n"),
- file, strerror (errno));
- read_file_free (fm);
- return;
- }
- /* Now open the file for writing. */
- fp = fopen (file, "wb");
- if (!fp)
- {
- logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
- file, strerror (errno));
- read_file_free (fm);
- return;
- }
-
- /* Here we loop through all the URLs in file, replacing those of
- them that are downloaded with relative references. */
- p = fm->content;
- for (link = links; link; link = link->next)
- {
- char *url_start = fm->content + link->pos;
-
- if (link->pos >= fm->length)
- {
- DEBUGP (("Something strange is going on. Please investigate."));
- break;
- }
- /* If the URL is not to be converted, skip it. */
- if (link->convert == CO_NOCONVERT)
- {
- DEBUGP (("Skipping %s at position %d.\n", link->url->url, link->pos));
- continue;
- }
-
- /* Echo the file contents, up to the offending URL's opening
- quote, to the outfile. */
- fwrite (p, 1, url_start - p, fp);
- p = url_start;
-
- switch (link->convert)
- {
- case CO_CONVERT_TO_RELATIVE:
- /* Convert absolute URL to relative. */
- {
- char *newname = construct_relative (file, link->local_name);
- char *quoted_newname = local_quote_string (newname);
-
- if (!link->link_refresh_p)
- p = replace_attr (p, link->size, fp, quoted_newname);
- else
- p = replace_attr_refresh_hack (p, link->size, fp, quoted_newname,
- link->refresh_timeout);
-
- DEBUGP (("TO_RELATIVE: %s to %s at position %d in %s.\n",
- link->url->url, newname, link->pos, file));
- xfree (newname);
- xfree (quoted_newname);
- ++to_file_count;
- break;
- }
- case CO_CONVERT_TO_COMPLETE:
- /* Convert the link to absolute URL. */
- {
- char *newlink = link->url->url;
- char *quoted_newlink = html_quote_string (newlink);
-
- if (!link->link_refresh_p)
- p = replace_attr (p, link->size, fp, quoted_newlink);
- else
- p = replace_attr_refresh_hack (p, link->size, fp, quoted_newlink,
- link->refresh_timeout);
-
- DEBUGP (("TO_COMPLETE: <something> to %s at position %d in %s.\n",
- newlink, link->pos, file));
- xfree (quoted_newlink);
- ++to_url_count;
- break;
- }
- case CO_NULLIFY_BASE:
- /* Change the base href to "". */
- p = replace_attr (p, link->size, fp, "");
- break;
- case CO_NOCONVERT:
- abort ();
- break;
- }
- }
-
- /* Output the rest of the file. */
- if (p - fm->content < fm->length)
- fwrite (p, 1, fm->length - (p - fm->content), fp);
- fclose (fp);
- read_file_free (fm);
-
- logprintf (LOG_VERBOSE, "%d-%d\n", to_file_count, to_url_count);
-}
-
-/* Construct and return a malloced copy of the relative link from two
- pieces of information: local name S1 of the referring file and
- local name S2 of the referred file.
-
- So, if S1 is "jagor.srce.hr/index.html" and S2 is
- "jagor.srce.hr/images/news.gif", the function will return
- "images/news.gif".
-
- Alternately, if S1 is "fly.cc.fer.hr/ioccc/index.html", and S2 is
- "fly.cc.fer.hr/images/fly.gif", the function will return
- "../images/fly.gif".
-
- Caveats: S1 should not begin with `/', unless S2 also begins with
- '/'. S1 should not contain things like ".." and such --
- construct_relative ("fly/ioccc/../index.html",
- "fly/images/fly.gif") will fail. (A workaround is to call
- something like path_simplify() on S1). */
-static char *
-construct_relative (const char *s1, const char *s2)
-{
- int i, cnt, sepdirs1;
- char *res;
-
- if (*s2 == '/')
- return xstrdup (s2);
- /* S1 should *not* be absolute, if S2 wasn't. */
- assert (*s1 != '/');
- i = cnt = 0;
- /* Skip the directories common to both strings. */
- while (1)
- {
- while (s1[i] && s2[i]
- && (s1[i] == s2[i])
- && (s1[i] != '/')
- && (s2[i] != '/'))
- ++i;
- if (s1[i] == '/' && s2[i] == '/')
- cnt = ++i;
- else
- break;
- }
- for (sepdirs1 = 0; s1[i]; i++)
- if (s1[i] == '/')
- ++sepdirs1;
- /* Now, construct the file as of:
- - ../ repeated sepdirs1 time
- - all the non-mutual directories of S2. */
- res = (char *)xmalloc (3 * sepdirs1 + strlen (s2 + cnt) + 1);
- for (i = 0; i < sepdirs1; i++)
- memcpy (res + 3 * i, "../", 3);
- strcpy (res + 3 * i, s2 + cnt);
- return res;
+ return false;
}
\f
-static void
-write_backup_file (const char *file, downloaded_file_t downloaded_file_return)
-{
- /* Rather than just writing over the original .html file with the
- converted version, save the former to *.orig. Note we only do
- this for files we've _successfully_ downloaded, so we don't
- clobber .orig files sitting around from previous invocations. */
-
- /* Construct the backup filename as the original name plus ".orig". */
- size_t filename_len = strlen(file);
- char* filename_plus_orig_suffix;
- boolean already_wrote_backup_file = FALSE;
- slist* converted_file_ptr;
- static slist* converted_files = NULL;
-
- if (downloaded_file_return == FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED)
- {
- /* Just write "orig" over "html". We need to do it this way
- because when we're checking to see if we've downloaded the
- file before (to see if we can skip downloading it), we don't
- know if it's a text/html file. Therefore we don't know yet
- at that stage that -E is going to cause us to tack on
- ".html", so we need to compare vs. the original URL plus
- ".orig", not the original URL plus ".html.orig". */
- filename_plus_orig_suffix = alloca (filename_len + 1);
- strcpy(filename_plus_orig_suffix, file);
- strcpy((filename_plus_orig_suffix + filename_len) - 4, "orig");
- }
- else /* downloaded_file_return == FILE_DOWNLOADED_NORMALLY */
- {
- /* Append ".orig" to the name. */
- filename_plus_orig_suffix = alloca (filename_len + sizeof(".orig"));
- strcpy(filename_plus_orig_suffix, file);
- strcpy(filename_plus_orig_suffix + filename_len, ".orig");
- }
-
- /* We can get called twice on the same URL thanks to the
- convert_all_links() call in main(). If we write the .orig file
- each time in such a case, it'll end up containing the first-pass
- conversion, not the original file. So, see if we've already been
- called on this file. */
- converted_file_ptr = converted_files;
- while (converted_file_ptr != NULL)
- if (strcmp(converted_file_ptr->string, file) == 0)
- {
- already_wrote_backup_file = TRUE;
- break;
- }
- else
- converted_file_ptr = converted_file_ptr->next;
-
- if (!already_wrote_backup_file)
- {
- /* Rename <file> to <file>.orig before former gets written over. */
- if (rename(file, filename_plus_orig_suffix) != 0)
- logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
- file, filename_plus_orig_suffix, strerror (errno));
-
- /* Remember that we've already written a .orig backup for this file.
- Note that we never free this memory since we need it till the
- convert_all_links() call, which is one of the last things the
- program does before terminating. BTW, I'm not sure if it would be
- safe to just set 'converted_file_ptr->string' to 'file' below,
- rather than making a copy of the string... Another note is that I
- thought I could just add a field to the urlpos structure saying
- that we'd written a .orig file for this URL, but that didn't work,
- so I had to make this separate list.
- -- Dan Harkless <wget@harkless.org>
-
- This [adding a field to the urlpos structure] didn't work
- because convert_file() is called from convert_all_links at
- the end of the retrieval with a freshly built new urlpos
- list.
- -- Hrvoje Niksic <hniksic@arsdigita.com>
- */
- converted_file_ptr = xmalloc(sizeof(*converted_file_ptr));
- converted_file_ptr->string = xstrdup(file); /* die on out-of-mem. */
- converted_file_ptr->next = converted_files;
- converted_files = converted_file_ptr;
- }
-}
-
-static int find_fragment PARAMS ((const char *, int, const char **,
- const char **));
-
-/* Replace an attribute's original text with NEW_TEXT. */
-
-static const char *
-replace_attr (const char *p, int size, FILE *fp, const char *new_text)
-{
- int quote_flag = 0;
- char quote_char = '\"'; /* use "..." for quoting, unless the
- original value is quoted, in which
- case reuse its quoting char. */
- const char *frag_beg, *frag_end;
-
- /* Structure of our string is:
- "...old-contents..."
- <--- size ---> (with quotes)
- OR:
- ...old-contents...
- <--- size --> (no quotes) */
-
- if (*p == '\"' || *p == '\'')
- {
- quote_char = *p;
- quote_flag = 1;
- ++p;
- size -= 2; /* disregard opening and closing quote */
- }
- putc (quote_char, fp);
- fputs (new_text, fp);
-
- /* Look for fragment identifier, if any. */
- if (find_fragment (p, size, &frag_beg, &frag_end))
- fwrite (frag_beg, 1, frag_end - frag_beg, fp);
- p += size;
- if (quote_flag)
- ++p;
- putc (quote_char, fp);
-
- return p;
-}
-
-/* The same as REPLACE_ATTR, but used when replacing
- <meta http-equiv=refresh content="new_text"> because we need to
- append "timeout_value; URL=" before the next_text. */
-
-static const char *
-replace_attr_refresh_hack (const char *p, int size, FILE *fp,
- const char *new_text, int timeout)
-{
- /* "0; URL=..." */
- char *new_with_timeout = (char *)alloca (numdigit (timeout)
- + 6 /* "; URL=" */
- + strlen (new_text)
- + 1);
- sprintf (new_with_timeout, "%d; URL=%s", timeout, new_text);
-
- return replace_attr (p, size, fp, new_with_timeout);
-}
-
-/* Find the first occurrence of '#' in [BEG, BEG+SIZE) that is not
- preceded by '&'. If the character is not found, return zero. If
- the character is found, return 1 and set BP and EP to point to the
- beginning and end of the region.
-
- This is used for finding the fragment indentifiers in URLs. */
-
static int
-find_fragment (const char *beg, int size, const char **bp, const char **ep)
-{
- const char *end = beg + size;
- int saw_amp = 0;
- for (; beg < end; beg++)
- {
- switch (*beg)
- {
- case '&':
- saw_amp = 1;
- break;
- case '#':
- if (!saw_amp)
- {
- *bp = beg;
- *ep = end;
- return 1;
- }
- /* fallthrough */
- default:
- saw_amp = 0;
- }
- }
- return 0;
-}
-
-/* Quote FILE for use as local reference to an HTML file.
-
- We quote ? as %3F to avoid passing part of the file name as the
- parameter when browsing the converted file through HTTP. However,
- it is safe to do this only when `--html-extension' is turned on.
- This is because converting "index.html?foo=bar" to
- "index.html%3Ffoo=bar" would break local browsing, as the latter
- isn't even recognized as an HTML file! However, converting
- "index.html?foo=bar.html" to "index.html%3Ffoo=bar.html" should be
- safe for both local and HTTP-served browsing. */
-
-static char *
-local_quote_string (const char *file)
+getchar_from_escaped_string (const char *str, char *c)
{
- const char *file_sans_qmark;
- int qm;
+ const char *p = str;
- if (!opt.html_extension)
- return html_quote_string (file);
+ assert (str && *str);
+ assert (c);
- qm = count_char (file, '?');
-
- if (qm)
+ if (p[0] == '%')
{
- const char *from = file;
- char *to, *newname;
-
- /* qm * 2 because we replace each question mark with "%3F",
- i.e. replace one char with three, hence two more. */
- int fsqlen = strlen (file) + qm * 2;
-
- to = newname = (char *)alloca (fsqlen + 1);
- for (; *from; from++)
- {
- if (*from != '?')
- *to++ = *from;
- else
- {
- *to++ = '%';
- *to++ = '3';
- *to++ = 'F';
- }
- }
- assert (to - newname == fsqlen);
- *to = '\0';
-
- file_sans_qmark = newname;
+ if (!c_isxdigit(p[1]) || !c_isxdigit(p[2]))
+ {
+ *c = '%';
+ return 1;
+ }
+ else
+ {
+ if (p[2] == 0)
+ return 0; /* error: invalid string */
+
+ *c = X2DIGITS_TO_NUM (p[1], p[2]);
+ if (URL_RESERVED_CHAR(*c))
+ {
+ *c = '%';
+ return 1;
+ }
+ else
+ return 3;
+ }
}
else
- file_sans_qmark = file;
-
- return html_quote_string (file_sans_qmark);
-}
-
-/* We're storing "modes" of type downloaded_file_t in the hash table.
- However, our hash tables only accept pointers for keys and values.
- So when we need a pointer, we use the address of a
- downloaded_file_t variable of static storage. */
-
-static downloaded_file_t *
-downloaded_mode_to_ptr (downloaded_file_t mode)
-{
- static downloaded_file_t
- v1 = FILE_NOT_ALREADY_DOWNLOADED,
- v2 = FILE_DOWNLOADED_NORMALLY,
- v3 = FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
- v4 = CHECK_FOR_FILE;
-
- switch (mode)
- {
- case FILE_NOT_ALREADY_DOWNLOADED:
- return &v1;
- case FILE_DOWNLOADED_NORMALLY:
- return &v2;
- case FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED:
- return &v3;
- case CHECK_FOR_FILE:
- return &v4;
- }
- return NULL;
-}
-
-/* This should really be merged with dl_file_url_map and
- downloaded_html_files in recur.c. This was originally a list, but
- I changed it to a hash table beause it was actually taking a lot of
- time to find things in it. */
-
-static struct hash_table *downloaded_files_hash;
-
-/* Remembers which files have been downloaded. In the standard case, should be
- called with mode == FILE_DOWNLOADED_NORMALLY for each file we actually
- download successfully (i.e. not for ones we have failures on or that we skip
- due to -N).
-
- When we've downloaded a file and tacked on a ".html" extension due to -E,
- call this function with FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED rather than
- FILE_DOWNLOADED_NORMALLY.
-
- If you just want to check if a file has been previously added without adding
- it, call with mode == CHECK_FOR_FILE. Please be sure to call this function
- with local filenames, not remote URLs. */
-downloaded_file_t
-downloaded_file (downloaded_file_t mode, const char *file)
-{
- downloaded_file_t *ptr;
-
- if (mode == CHECK_FOR_FILE)
{
- if (!downloaded_files_hash)
- return FILE_NOT_ALREADY_DOWNLOADED;
- ptr = hash_table_get (downloaded_files_hash, file);
- if (!ptr)
- return FILE_NOT_ALREADY_DOWNLOADED;
- return *ptr;
+ *c = p[0];
}
- if (!downloaded_files_hash)
- downloaded_files_hash = make_string_hash_table (0);
-
- ptr = hash_table_get (downloaded_files_hash, file);
- if (ptr)
- return *ptr;
-
- ptr = downloaded_mode_to_ptr (mode);
- hash_table_put (downloaded_files_hash, xstrdup (file), &ptr);
-
- return FILE_NOT_ALREADY_DOWNLOADED;
+ return 1;
}
-static int
-df_free_mapper (void *key, void *value, void *ignored)
+bool
+are_urls_equal (const char *u1, const char *u2)
{
- xfree (key);
- return 0;
-}
+ const char *p, *q;
+ int pp, qq;
+ char ch1, ch2;
+ assert(u1 && u2);
-void
-downloaded_files_free (void)
-{
- if (downloaded_files_hash)
+ p = u1;
+ q = u2;
+
+ while (*p && *q
+ && (pp = getchar_from_escaped_string (p, &ch1))
+ && (qq = getchar_from_escaped_string (q, &ch2))
+ && (c_tolower(ch1) == c_tolower(ch2)))
{
- hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
- hash_table_destroy (downloaded_files_hash);
- downloaded_files_hash = NULL;
+ p += pp;
+ q += qq;
}
-}
-/* Return non-zero if scheme a is similar to scheme b.
-
- Schemes are similar if they are equal. If SSL is supported, schemes
- are also similar if one is http (SCHEME_HTTP) and the other is https
- (SCHEME_HTTPS). */
-int
-schemes_are_similar_p (enum url_scheme a, enum url_scheme b)
-{
- if (a == b)
- return 1;
-#ifdef HAVE_SSL
- if ((a == SCHEME_HTTP && b == SCHEME_HTTPS)
- || (a == SCHEME_HTTPS && b == SCHEME_HTTP))
- return 1;
-#endif
- return 0;
+ return (*p == 0 && *q == 0 ? true : false);
}
\f
-#if 0
+#ifdef TESTING
/* Debugging and testing support for path_simplify. */
+#if 0
/* Debug: run path_simplify on PATH and return the result in a new
string. Useful for calling from the debugger. */
static char *
path_simplify (copy);
return copy;
}
+#endif
-static void
-run_test (char *test, char *expected_result, int expected_change)
+static const char *
+run_test (const char *test, const char *expected_result, enum url_scheme scheme,
+ bool expected_change)
{
char *test_copy = xstrdup (test);
- int modified = path_simplify (test_copy);
+ bool modified = path_simplify (scheme, test_copy);
if (0 != strcmp (test_copy, expected_result))
{
printf ("Failed path_simplify(\"%s\"): expected \"%s\", got \"%s\".\n",
- test, expected_result, test_copy);
+ test, expected_result, test_copy);
+ mu_assert ("", 0);
}
if (modified != expected_change)
{
- if (expected_change == 1)
- printf ("Expected no modification with path_simplify(\"%s\").\n",
- test);
+ if (expected_change)
+ printf ("Expected modification with path_simplify(\"%s\").\n",
+ test);
else
- printf ("Expected modification with path_simplify(\"%s\").\n",
- test);
+ printf ("Expected no modification with path_simplify(\"%s\").\n",
+ test);
}
xfree (test_copy);
+ mu_assert ("", modified == expected_change);
+ return NULL;
}
-static void
+const char *
test_path_simplify (void)
{
- static struct {
- char *test, *result;
- int should_modify;
+ static const struct {
+ const char *test, *result;
+ enum url_scheme scheme;
+ bool should_modify;
} tests[] = {
- { "", "", 0 },
- { ".", "", 1 },
- { "..", "", 1 },
- { "foo", "foo", 0 },
- { "foo/bar", "foo/bar", 0 },
- { "foo///bar", "foo/bar", 1 },
- { "foo/.", "foo/", 1 },
- { "foo/./", "foo/", 1 },
- { "foo./", "foo./", 0 },
- { "foo/../bar", "bar", 1 },
- { "foo/../bar/", "bar/", 1 },
- { "foo/bar/..", "foo/", 1 },
- { "foo/bar/../x", "foo/x", 1 },
- { "foo/bar/../x/", "foo/x/", 1 },
- { "foo/..", "", 1 },
- { "foo/../..", "", 1 },
- { "a/b/../../c", "c", 1 },
- { "./a/../b", "b", 1 }
+ { "", "", SCHEME_HTTP, false },
+ { ".", "", SCHEME_HTTP, true },
+ { "./", "", SCHEME_HTTP, true },
+ { "..", "", SCHEME_HTTP, true },
+ { "../", "", SCHEME_HTTP, true },
+ { "..", "..", SCHEME_FTP, false },
+ { "../", "../", SCHEME_FTP, false },
+ { "foo", "foo", SCHEME_HTTP, false },
+ { "foo/bar", "foo/bar", SCHEME_HTTP, false },
+ { "foo///bar", "foo///bar", SCHEME_HTTP, false },
+ { "foo/.", "foo/", SCHEME_HTTP, true },
+ { "foo/./", "foo/", SCHEME_HTTP, true },
+ { "foo./", "foo./", SCHEME_HTTP, false },
+ { "foo/../bar", "bar", SCHEME_HTTP, true },
+ { "foo/../bar/", "bar/", SCHEME_HTTP, true },
+ { "foo/bar/..", "foo/", SCHEME_HTTP, true },
+ { "foo/bar/../x", "foo/x", SCHEME_HTTP, true },
+ { "foo/bar/../x/", "foo/x/", SCHEME_HTTP, true },
+ { "foo/..", "", SCHEME_HTTP, true },
+ { "foo/../..", "", SCHEME_HTTP, true },
+ { "foo/../../..", "", SCHEME_HTTP, true },
+ { "foo/../../bar/../../baz", "baz", SCHEME_HTTP, true },
+ { "foo/../..", "..", SCHEME_FTP, true },
+ { "foo/../../..", "../..", SCHEME_FTP, true },
+ { "foo/../../bar/../../baz", "../../baz", SCHEME_FTP, true },
+ { "a/b/../../c", "c", SCHEME_HTTP, true },
+ { "./a/../b", "b", SCHEME_HTTP, true }
};
- int i;
+ unsigned i;
for (i = 0; i < countof (tests); i++)
{
- char *test = tests[i].test;
- char *expected_result = tests[i].result;
- int expected_change = tests[i].should_modify;
- run_test (test, expected_result, expected_change);
+ const char *message;
+ const char *test = tests[i].test;
+ const char *expected_result = tests[i].result;
+ enum url_scheme scheme = tests[i].scheme;
+ bool expected_change = tests[i].should_modify;
+
+ message = run_test (test, expected_result, scheme, expected_change);
+ if (message) return message;
}
+ return NULL;
+}
- /* Now run all the tests with a leading slash before the test case,
- to prove that the slash is being preserved. */
- for (i = 0; i < countof (tests); i++)
+const char *
+test_append_uri_pathel(void)
+{
+ unsigned i;
+ static const struct {
+ const char *original_url;
+ const char *input;
+ bool escaped;
+ const char *expected_result;
+ } test_array[] = {
+ { "http://www.yoyodyne.com/path/", "somepage.html", false, "http://www.yoyodyne.com/path/somepage.html" },
+ };
+
+ for (i = 0; i < countof(test_array); ++i)
{
- char *test, *expected_result;
- int expected_change = tests[i].should_modify;
+ struct growable dest;
+ const char *p = test_array[i].input;
+
+ memset (&dest, 0, sizeof (dest));
- test = xmalloc (1 + strlen (tests[i].test) + 1);
- sprintf (test, "/%s", tests[i].test);
+ append_string (test_array[i].original_url, &dest);
+ append_uri_pathel (p, p + strlen(p), test_array[i].escaped, &dest);
+
+ mu_assert ("test_append_uri_pathel: wrong result",
+ strcmp (dest.base, test_array[i].expected_result) == 0);
+ }
- expected_result = xmalloc (1 + strlen (tests[i].result) + 1);
- sprintf (expected_result, "/%s", tests[i].result);
+ return NULL;
+}
- run_test (test, expected_result, expected_change);
+const char *
+test_are_urls_equal(void)
+{
+ unsigned i;
+ static const struct {
+ const char *url1;
+ const char *url2;
+ bool expected_result;
+ } test_array[] = {
+ { "http://www.adomain.com/apath/", "http://www.adomain.com/apath/", true },
+ { "http://www.adomain.com/apath/", "http://www.adomain.com/anotherpath/", false },
+ { "http://www.adomain.com/apath/", "http://www.anotherdomain.com/path/", false },
+ { "http://www.adomain.com/~path/", "http://www.adomain.com/%7epath/", true },
+ { "http://www.adomain.com/longer-path/", "http://www.adomain.com/path/", false },
+ { "http://www.adomain.com/path%2f", "http://www.adomain.com/path/", false },
+ };
- xfree (test);
- xfree (expected_result);
+ for (i = 0; i < countof(test_array); ++i)
+ {
+ mu_assert ("test_are_urls_equal: wrong result",
+ are_urls_equal (test_array[i].url1, test_array[i].url2) == test_array[i].expected_result);
}
+
+ return NULL;
}
-#endif
+
+#endif /* TESTING */
+
+/*
+ * vim: et ts=2 sw=2
+ */
+
projects / wget / blobdiff