2 Copyright (C) 1995, 1996, 1997, 2000, 2001, 2003, 2003
3 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or (at
10 your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 In addition, as a special exception, the Free Software Foundation
22 gives permission to link the code of its release of Wget with the
23 OpenSSL project's "OpenSSL" library (or with modified versions of it
24 that use the same license as the "OpenSSL" library), and distribute
25 the linked executables. You must obey the GNU General Public License
26 in all respects for all of the code used other than "OpenSSL". If you
27 modify this file, you may extend this exception to your version of the
28 file, but you are not obligated to do so. If you do not wish to do
29 so, delete this exception statement from your version. */
40 #include <sys/types.h>
62 /* Supported schemes: */
63 static struct scheme_data supported_schemes[] =
65 { "http://", DEFAULT_HTTP_PORT, 1 },
67 { "https://", DEFAULT_HTTPS_PORT, 1 },
69 { "ftp://", DEFAULT_FTP_PORT, 1 },
75 /* Forward declarations: */
77 static int path_simplify PARAMS ((char *));
79 /* Support for encoding and decoding of URL strings. We determine
80 whether a character is unsafe through static table lookup. This
81 code assumes ASCII character set and 8-bit chars. */
84 /* rfc1738 reserved chars, preserved from encoding. */
87 /* rfc1738 unsafe chars, plus some more. */
91 #define urlchr_test(c, mask) (urlchr_table[(unsigned char)(c)] & (mask))
92 #define URL_RESERVED_CHAR(c) urlchr_test(c, urlchr_reserved)
93 #define URL_UNSAFE_CHAR(c) urlchr_test(c, urlchr_unsafe)
95 /* Shorthands for the table: */
96 #define R urlchr_reserved
97 #define U urlchr_unsafe
100 const static unsigned char urlchr_table[256] =
102 U, U, U, U, U, U, U, U, /* NUL SOH STX ETX EOT ENQ ACK BEL */
103 U, U, U, U, U, U, U, U, /* BS HT LF VT FF CR SO SI */
104 U, U, U, U, U, U, U, U, /* DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
105 U, U, U, U, U, U, U, U, /* CAN EM SUB ESC FS GS RS US */
106 U, 0, U, RU, 0, U, R, 0, /* SP ! " # $ % & ' */
107 0, 0, 0, R, 0, 0, 0, R, /* ( ) * + , - . / */
108 0, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
109 0, 0, RU, R, U, R, U, R, /* 8 9 : ; < = > ? */
110 RU, 0, 0, 0, 0, 0, 0, 0, /* @ A B C D E F G */
111 0, 0, 0, 0, 0, 0, 0, 0, /* H I J K L M N O */
112 0, 0, 0, 0, 0, 0, 0, 0, /* P Q R S T U V W */
113 0, 0, 0, RU, U, RU, U, 0, /* X Y Z [ \ ] ^ _ */
114 U, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
115 0, 0, 0, 0, 0, 0, 0, 0, /* h i j k l m n o */
116 0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
117 0, 0, 0, U, U, U, U, U, /* x y z { | } ~ DEL */
119 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
120 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
121 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
122 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
124 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
125 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
126 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
127 U, U, U, U, U, U, U, U, U, U, U, U, U, U, U, U,
133 /* URL-unescape the string S.
135 This is done by transforming the sequences "%HH" to the character
136 represented by the hexadecimal digits HH. If % is not followed by
137 two hexadecimal digits, it is inserted literally.
139 The transformation is done in place. If you need the original
140 string intact, make a copy before calling this function. */
143 url_unescape (char *s)
145 char *t = s; /* t - tortoise */
146 char *h = s; /* h - hare */
157 /* Do nothing if '%' is not followed by two hex digits. */
158 if (!h[1] || !h[2] || !(ISXDIGIT (h[1]) && ISXDIGIT (h[2])))
160 *t = X2DIGITS_TO_NUM (h[1], h[2]);
167 /* The core of url_escape_* functions. Escapes the characters that
168 match the provided mask in urlchr_table.
170 If ALLOW_PASSTHROUGH is non-zero, a string with no unsafe chars
171 will be returned unchanged. If ALLOW_PASSTHROUGH is zero, a
172 freshly allocated string will be returned in all cases. */
175 url_escape_1 (const char *s, unsigned char mask, int allow_passthrough)
182 for (p1 = s; *p1; p1++)
183 if (urlchr_test (*p1, mask))
184 addition += 2; /* Two more characters (hex digits) */
187 return allow_passthrough ? (char *)s : xstrdup (s);
189 newlen = (p1 - s) + addition;
190 newstr = (char *)xmalloc (newlen + 1);
196 /* Quote the characters that match the test mask. */
197 if (urlchr_test (*p1, mask))
199 unsigned char c = *p1++;
201 *p2++ = XNUM_TO_DIGIT (c >> 4);
202 *p2++ = XNUM_TO_DIGIT (c & 0xf);
207 assert (p2 - newstr == newlen);
213 /* URL-escape the unsafe characters (see urlchr_table) in a given
214 string, returning a freshly allocated string. */
217 url_escape (const char *s)
219 return url_escape_1 (s, urlchr_unsafe, 0);
222 /* URL-escape the unsafe characters (see urlchr_table) in a given
223 string. If no characters are unsafe, S is returned. */
226 url_escape_allow_passthrough (const char *s)
228 return url_escape_1 (s, urlchr_unsafe, 1);
231 enum copy_method { CM_DECODE, CM_ENCODE, CM_PASSTHROUGH };
233 /* Decide whether to encode, decode, or pass through the char at P.
234 This used to be a macro, but it got a little too convoluted. */
235 static inline enum copy_method
236 decide_copy_method (const char *p)
240 if (ISXDIGIT (*(p + 1)) && ISXDIGIT (*(p + 2)))
242 /* %xx sequence: decode it, unless it would decode to an
243 unsafe or a reserved char; in that case, leave it as
245 char preempt = X2DIGITS_TO_NUM (*(p + 1), *(p + 2));
246 if (URL_UNSAFE_CHAR (preempt) || URL_RESERVED_CHAR (preempt))
247 return CM_PASSTHROUGH;
252 /* Garbled %.. sequence: encode `%'. */
255 else if (URL_UNSAFE_CHAR (*p) && !URL_RESERVED_CHAR (*p))
258 return CM_PASSTHROUGH;
261 /* Translate a %-escaped (but possibly non-conformant) input string S
262 into a %-escaped (and conformant) output string. If no characters
263 are encoded or decoded, return the same string S; otherwise, return
264 a freshly allocated string with the new contents.
266 After a URL has been run through this function, the protocols that
267 use `%' as the quote character can use the resulting string as-is,
268 while those that don't call url_unescape() to get to the intended
269 data. This function is also stable: after an input string is
270 transformed the first time, all further transformations of the
271 result yield the same result string.
273 Let's discuss why this function is needed.
275 Imagine Wget is to retrieve `http://abc.xyz/abc def'. Since a raw
276 space character would mess up the HTTP request, it needs to be
279 GET /abc%20def HTTP/1.0
281 It appears that the unsafe chars need to be quoted, for example
282 with url_escape. But what if we're requested to download
283 `abc%20def'? url_escape transforms "%" to "%25", which would leave
284 us with `abc%2520def'. This is incorrect -- since %-escapes are
285 part of URL syntax, "%20" is the correct way to denote a literal
286 space on the Wget command line. This leaves us in the conclusion
287 that in that case Wget should not call url_escape, but leave the
290 And what if the requested URI is `abc%20 def'? If we call
291 url_escape, we end up with `/abc%2520%20def', which is almost
292 certainly not intended. If we don't call url_escape, we are left
293 with the embedded space and cannot complete the request. What the
294 user meant was for Wget to request `/abc%20%20def', and this is
295 where reencode_escapes kicks in.
297 Wget used to solve this by first decoding %-quotes, and then
298 encoding all the "unsafe" characters found in the resulting string.
299 This was wrong because it didn't preserve certain URL special
300 (reserved) characters. For instance, URI containing "a%2B+b" (0x2b
301 == '+') would get translated to "a%2B%2Bb" or "a++b" depending on
302 whether we considered `+' reserved (it is). One of these results
303 is inevitable because by the second step we would lose information
304 on whether the `+' was originally encoded or not. Both results
305 were wrong because in CGI parameters + means space, while %2B means
306 literal plus. reencode_escapes correctly translates the above to
307 "a%2B+b", i.e. returns the original string.
309 This function uses an algorithm proposed by Anon Sricharoenchai:
311 1. Encode all URL_UNSAFE and the "%" that are not followed by 2
314 2. Decode all "%XX" except URL_UNSAFE, URL_RESERVED (";/?:@=&") and
317 ...except that this code conflates the two steps, and decides
318 whether to encode, decode, or pass through each character in turn.
319 The function still uses two passes, but their logic is the same --
320 the first pass exists merely for the sake of allocation. Another
321 small difference is that we include `+' to URL_RESERVED.
325 "http://abc.xyz/%20%3F%%36%31%25aa% a?a=%61+a%2Ba&b=b%26c%3Dc"
327 "http://abc.xyz/%20%3F%2561%25aa%25%20a?a=a+a%2Ba&b=b%26c%3Dc"
331 "foo bar" -> "foo%20bar"
332 "foo%20bar" -> "foo%20bar"
333 "foo %20bar" -> "foo%20%20bar"
334 "foo%%20bar" -> "foo%25%20bar" (0x25 == '%')
335 "foo%25%20bar" -> "foo%25%20bar"
336 "foo%2%20bar" -> "foo%252%20bar"
337 "foo+bar" -> "foo+bar" (plus is reserved!)
338 "foo%2b+bar" -> "foo%2b+bar" */
341 reencode_escapes (const char *s)
347 int encode_count = 0;
348 int decode_count = 0;
350 /* First, pass through the string to see if there's anything to do,
351 and to calculate the new length. */
352 for (p1 = s; *p1; p1++)
354 switch (decide_copy_method (p1))
367 if (!encode_count && !decode_count)
368 /* The string is good as it is. */
369 return (char *)s; /* C const model sucks. */
372 /* Each encoding adds two characters (hex digits), while each
373 decoding removes two characters. */
374 newlen = oldlen + 2 * (encode_count - decode_count);
375 newstr = xmalloc (newlen + 1);
382 switch (decide_copy_method (p1))
386 unsigned char c = *p1++;
388 *p2++ = XNUM_TO_DIGIT (c >> 4);
389 *p2++ = XNUM_TO_DIGIT (c & 0xf);
393 *p2++ = X2DIGITS_TO_NUM (p1[1], p1[2]);
394 p1 += 3; /* skip %xx */
401 assert (p2 - newstr == newlen);
405 /* Returns the scheme type if the scheme is supported, or
406 SCHEME_INVALID if not. */
409 url_scheme (const char *url)
413 for (i = 0; supported_schemes[i].leading_string; i++)
414 if (0 == strncasecmp (url, supported_schemes[i].leading_string,
415 strlen (supported_schemes[i].leading_string)))
417 if (supported_schemes[i].enabled)
418 return (enum url_scheme) i;
420 return SCHEME_INVALID;
423 return SCHEME_INVALID;
426 #define SCHEME_CHAR(ch) (ISALNUM (ch) || (ch) == '-' || (ch) == '+')
428 /* Return 1 if the URL begins with any "scheme", 0 otherwise. As
429 currently implemented, it returns true if URL begins with
433 url_has_scheme (const char *url)
437 /* The first char must be a scheme char. */
438 if (!*p || !SCHEME_CHAR (*p))
441 /* Followed by 0 or more scheme chars. */
442 while (*p && SCHEME_CHAR (*p))
444 /* Terminated by ':'. */
449 scheme_default_port (enum url_scheme scheme)
451 return supported_schemes[scheme].default_port;
455 scheme_disable (enum url_scheme scheme)
457 supported_schemes[scheme].enabled = 0;
460 /* Skip the username and password, if present here. The function
461 should *not* be called with the complete URL, but with the part
462 right after the scheme.
464 If no username and password are found, return 0. */
467 url_skip_credentials (const char *url)
469 /* Look for '@' that comes before terminators, such as '/', '?',
471 const char *p = (const char *)strpbrk (url, "@/?#;");
477 /* Parse credentials contained in [BEG, END). The region is expected
478 to have come from a URL and is unescaped. */
481 parse_credentials (const char *beg, const char *end, char **user, char **passwd)
487 return 0; /* empty user name */
489 colon = memchr (beg, ':', end - beg);
491 return 0; /* again empty user name */
495 *passwd = strdupdelim (colon + 1, end);
497 url_unescape (*passwd);
504 *user = strdupdelim (beg, userend);
505 url_unescape (*user);
509 /* Used by main.c: detect URLs written using the "shorthand" URL forms
510 popularized by Netscape and NcFTP. HTTP shorthands look like this:
512 www.foo.com[:port]/dir/file -> http://www.foo.com[:port]/dir/file
513 www.foo.com[:port] -> http://www.foo.com[:port]
515 FTP shorthands look like this:
517 foo.bar.com:dir/file -> ftp://foo.bar.com/dir/file
518 foo.bar.com:/absdir/file -> ftp://foo.bar.com//absdir/file
520 If the URL needs not or cannot be rewritten, return NULL. */
523 rewrite_shorthand_url (const char *url)
527 if (url_has_scheme (url))
530 /* Look for a ':' or '/'. The former signifies NcFTP syntax, the
532 for (p = url; *p && *p != ':' && *p != '/'; p++)
542 /* If the characters after the colon and before the next slash
543 or end of string are all digits, it's HTTP. */
545 for (pp = p + 1; ISDIGIT (*pp); pp++)
547 if (digits > 0 && (*pp == '/' || *pp == '\0'))
550 /* Prepend "ftp://" to the entire URL... */
551 res = xmalloc (6 + strlen (url) + 1);
552 sprintf (res, "ftp://%s", url);
553 /* ...and replace ':' with '/'. */
554 res[6 + (p - url)] = '/';
561 /* Just prepend "http://" to what we have. */
562 res = xmalloc (7 + strlen (url) + 1);
563 sprintf (res, "http://%s", url);
568 static void split_path PARAMS ((const char *, char **, char **));
570 /* Like strpbrk, with the exception that it returns the pointer to the
571 terminating zero (end-of-string aka "eos") if no matching character
574 Although I normally balk at Gcc-specific optimizations, it probably
575 makes sense here: glibc has optimizations that detect strpbrk being
576 called with literal string as ACCEPT and inline the search. That
577 optimization is defeated if strpbrk is hidden within the call to
578 another function. (And no, making strpbrk_or_eos inline doesn't
579 help because the check for literal accept is in the
584 #define strpbrk_or_eos(s, accept) ({ \
585 char *SOE_p = strpbrk (s, accept); \
587 SOE_p = (char *)s + strlen (s); \
591 #else /* not __GNUC__ */
594 strpbrk_or_eos (const char *s, const char *accept)
596 char *p = strpbrk (s, accept);
598 p = (char *)s + strlen (s);
603 /* Turn STR into lowercase; return non-zero if a character was
607 lowercase_str (char *str)
614 *str = TOLOWER (*str);
619 static char *parse_errors[] = {
620 #define PE_NO_ERROR 0
622 #define PE_UNSUPPORTED_SCHEME 1
623 N_("Unsupported scheme"),
624 #define PE_EMPTY_HOST 2
626 #define PE_BAD_PORT_NUMBER 3
627 N_("Bad port number"),
628 #define PE_INVALID_USER_NAME 4
629 N_("Invalid user name"),
630 #define PE_UNTERMINATED_IPV6_ADDRESS 5
631 N_("Unterminated IPv6 numeric address"),
632 #define PE_IPV6_NOT_SUPPORTED 6
633 N_("IPv6 addresses not supported"),
634 #define PE_INVALID_IPV6_ADDRESS 7
635 N_("Invalid IPv6 numeric address")
639 /* The following two functions were adapted from glibc. */
642 is_valid_ipv4_address (const char *str, const char *end)
652 if (ch >= '0' && ch <= '9')
654 val = val * 10 + (ch - '0');
665 else if (ch == '.' && saw_digit == 1)
682 is_valid_ipv6_address (const char *str, const char *end)
702 /* Leading :: requires some special handling. */
706 if (str == end || *str != ':')
718 /* if ch is a number, add it to val. */
722 val |= XDIGIT_TO_NUM (ch);
729 /* if ch is a colon ... */
742 if (tp > NS_IN6ADDRSZ - NS_INT16SZ)
750 /* if ch is a dot ... */
751 if (ch == '.' && (tp <= NS_IN6ADDRSZ - NS_INADDRSZ)
752 && is_valid_ipv4_address (curtok, end) == 1)
764 if (tp > NS_IN6ADDRSZ - NS_INT16SZ)
771 if (tp == NS_IN6ADDRSZ)
776 if (tp != NS_IN6ADDRSZ)
785 Return a new struct url if successful, NULL on error. In case of
786 error, and if ERROR is not NULL, also set *ERROR to the appropriate
789 url_parse (const char *url, int *error)
793 int path_modified, host_modified;
795 enum url_scheme scheme;
797 const char *uname_b, *uname_e;
798 const char *host_b, *host_e;
799 const char *path_b, *path_e;
800 const char *params_b, *params_e;
801 const char *query_b, *query_e;
802 const char *fragment_b, *fragment_e;
805 char *user = NULL, *passwd = NULL;
807 char *url_encoded = NULL;
811 scheme = url_scheme (url);
812 if (scheme == SCHEME_INVALID)
814 error_code = PE_UNSUPPORTED_SCHEME;
818 url_encoded = reencode_escapes (url);
821 p += strlen (supported_schemes[scheme].leading_string);
823 p += url_skip_credentials (p);
826 /* scheme://user:pass@host[:port]... */
829 /* We attempt to break down the URL into the components path,
830 params, query, and fragment. They are ordered like this:
832 scheme://host[:port][/path][;params][?query][#fragment] */
834 params_b = params_e = NULL;
835 query_b = query_e = NULL;
836 fragment_b = fragment_e = NULL;
842 /* Handle IPv6 address inside square brackets. Ideally we'd
843 just look for the terminating ']', but rfc2732 mandates
844 rejecting invalid IPv6 addresses. */
846 /* The address begins after '['. */
848 host_e = strchr (host_b, ']');
852 error_code = PE_UNTERMINATED_IPV6_ADDRESS;
857 /* Check if the IPv6 address is valid. */
858 if (!is_valid_ipv6_address(host_b, host_e))
860 error_code = PE_INVALID_IPV6_ADDRESS;
864 /* Continue parsing after the closing ']'. */
867 error_code = PE_IPV6_NOT_SUPPORTED;
873 p = strpbrk_or_eos (p, ":/;?#");
877 if (host_b == host_e)
879 error_code = PE_EMPTY_HOST;
883 port = scheme_default_port (scheme);
886 const char *port_b, *port_e, *pp;
888 /* scheme://host:port/tralala */
892 p = strpbrk_or_eos (p, "/;?#");
895 if (port_b == port_e)
897 /* http://host:/whatever */
899 error_code = PE_BAD_PORT_NUMBER;
903 for (port = 0, pp = port_b; pp < port_e; pp++)
907 /* http://host:12randomgarbage/blah */
909 error_code = PE_BAD_PORT_NUMBER;
913 port = 10 * port + (*pp - '0');
921 p = strpbrk_or_eos (p, ";?#");
926 /* Path is not allowed not to exist. */
934 p = strpbrk_or_eos (p, "?#");
941 p = strpbrk_or_eos (p, "#");
944 /* Hack that allows users to use '?' (a wildcard character) in
945 FTP URLs without it being interpreted as a query string
947 if (scheme == SCHEME_FTP)
949 query_b = query_e = NULL;
962 if (uname_b != uname_e)
964 /* http://user:pass@host */
966 /* uname_b uname_e */
967 if (!parse_credentials (uname_b, uname_e - 1, &user, &passwd))
969 error_code = PE_INVALID_USER_NAME;
974 u = (struct url *)xmalloc (sizeof (struct url));
975 memset (u, 0, sizeof (*u));
978 u->host = strdupdelim (host_b, host_e);
983 u->path = strdupdelim (path_b, path_e);
984 path_modified = path_simplify (u->path);
985 split_path (u->path, &u->dir, &u->file);
987 host_modified = lowercase_str (u->host);
990 u->params = strdupdelim (params_b, params_e);
992 u->query = strdupdelim (query_b, query_e);
994 u->fragment = strdupdelim (fragment_b, fragment_e);
996 if (path_modified || u->fragment || host_modified || path_b == path_e)
998 /* If we suspect that a transformation has rendered what
999 url_string might return different from URL_ENCODED, rebuild
1000 u->url using url_string. */
1001 u->url = url_string (u, 0);
1003 if (url_encoded != url)
1004 xfree ((char *) url_encoded);
1008 if (url_encoded == url)
1009 u->url = xstrdup (url);
1011 u->url = url_encoded;
1018 /* Cleanup in case of error: */
1019 if (url_encoded && url_encoded != url)
1020 xfree (url_encoded);
1022 /* Transmit the error code to the caller, if the caller wants to
1025 *error = error_code;
1029 /* Return the error message string from ERROR_CODE, which should have
1030 been retrieved from url_parse. The error message is translated. */
1033 url_error (int error_code)
1035 assert (error_code >= 0 && error_code < countof (parse_errors));
1036 return _(parse_errors[error_code]);
1039 /* Split PATH into DIR and FILE. PATH comes from the URL and is
1040 expected to be URL-escaped.
1042 The path is split into directory (the part up to the last slash)
1043 and file (the part after the last slash), which are subsequently
1044 unescaped. Examples:
1047 "foo/bar/baz" "foo/bar" "baz"
1048 "foo/bar/" "foo/bar" ""
1050 "foo/bar/baz%2fqux" "foo/bar" "baz/qux" (!)
1052 DIR and FILE are freshly allocated. */
1055 split_path (const char *path, char **dir, char **file)
1057 char *last_slash = strrchr (path, '/');
1060 *dir = xstrdup ("");
1061 *file = xstrdup (path);
1065 *dir = strdupdelim (path, last_slash);
1066 *file = xstrdup (last_slash + 1);
1068 url_unescape (*dir);
1069 url_unescape (*file);
1072 /* Note: URL's "full path" is the path with the query string and
1073 params appended. The "fragment" (#foo) is intentionally ignored,
1074 but that might be changed. For example, if the original URL was
1075 "http://host:port/foo/bar/baz;bullshit?querystring#uselessfragment",
1076 the full path will be "/foo/bar/baz;bullshit?querystring". */
1078 /* Return the length of the full path, without the terminating
1082 full_path_length (const struct url *url)
1086 #define FROB(el) if (url->el) len += 1 + strlen (url->el)
1097 /* Write out the full path. */
1100 full_path_write (const struct url *url, char *where)
1102 #define FROB(el, chr) do { \
1103 char *f_el = url->el; \
1105 int l = strlen (f_el); \
1107 memcpy (where, f_el, l); \
1119 /* Public function for getting the "full path". E.g. if u->path is
1120 "foo/bar" and u->query is "param=value", full_path will be
1121 "/foo/bar?param=value". */
1124 url_full_path (const struct url *url)
1126 int length = full_path_length (url);
1127 char *full_path = (char *)xmalloc(length + 1);
1129 full_path_write (url, full_path);
1130 full_path[length] = '\0';
1135 /* Escape unsafe and reserved characters, except for the slash
1139 url_escape_dir (const char *dir)
1141 char *newdir = url_escape_1 (dir, urlchr_unsafe | urlchr_reserved, 1);
1146 /* Unescape slashes in NEWDIR. */
1148 h = newdir; /* hare */
1149 t = newdir; /* tortoise */
1151 for (; *h; h++, t++)
1153 /* url_escape_1 having converted '/' to "%2F" exactly. */
1154 if (*h == '%' && h[1] == '2' && h[2] == 'F')
1167 /* Sync u->path and u->url with u->dir and u->file. Called after
1168 u->file or u->dir have been changed, typically by the FTP code. */
1171 sync_path (struct url *u)
1173 char *newpath, *efile, *edir;
1177 /* u->dir and u->file are not escaped. URL-escape them before
1178 reassembling them into u->path. That way, if they contain
1179 separators like '?' or even if u->file contains slashes, the
1180 path will be correctly assembled. (u->file can contain slashes
1181 if the URL specifies it with %2f, or if an FTP server returns
1183 edir = url_escape_dir (u->dir);
1184 efile = url_escape_1 (u->file, urlchr_unsafe | urlchr_reserved, 1);
1187 newpath = xstrdup (efile);
1190 int dirlen = strlen (edir);
1191 int filelen = strlen (efile);
1193 /* Copy "DIR/FILE" to newpath. */
1194 char *p = newpath = xmalloc (dirlen + 1 + filelen + 1);
1195 memcpy (p, edir, dirlen);
1198 memcpy (p, efile, filelen);
1207 if (efile != u->file)
1210 /* Regenerate u->url as well. */
1212 u->url = url_string (u, 0);
1215 /* Mutators. Code in ftp.c insists on changing u->dir and u->file.
1216 This way we can sync u->path and u->url when they get changed. */
1219 url_set_dir (struct url *url, const char *newdir)
1222 url->dir = xstrdup (newdir);
1227 url_set_file (struct url *url, const char *newfile)
1230 url->file = xstrdup (newfile);
1235 url_free (struct url *url)
1241 FREE_MAYBE (url->params);
1242 FREE_MAYBE (url->query);
1243 FREE_MAYBE (url->fragment);
1244 FREE_MAYBE (url->user);
1245 FREE_MAYBE (url->passwd);
1253 /* Create all the necessary directories for PATH (a file). Calls
1254 mkdirhier() internally. */
1256 mkalldirs (const char *path)
1263 p = path + strlen (path);
1264 for (; *p != '/' && p != path; p--)
1267 /* Don't create if it's just a file. */
1268 if ((p == path) && (*p != '/'))
1270 t = strdupdelim (path, p);
1272 /* Check whether the directory exists. */
1273 if ((stat (t, &st) == 0))
1275 if (S_ISDIR (st.st_mode))
1282 /* If the dir exists as a file name, remove it first. This
1283 is *only* for Wget to work with buggy old CERN http
1284 servers. Here is the scenario: When Wget tries to
1285 retrieve a directory without a slash, e.g.
1286 http://foo/bar (bar being a directory), CERN server will
1287 not redirect it too http://foo/bar/ -- it will generate a
1288 directory listing containing links to bar/file1,
1289 bar/file2, etc. Wget will lose because it saves this
1290 HTML listing to a file `bar', so it cannot create the
1291 directory. To work around this, if the file of the same
1292 name exists, we just remove it and create the directory
1294 DEBUGP (("Removing %s because of directory danger!\n", t));
1298 res = make_directory (t);
1300 logprintf (LOG_NOTQUIET, "%s: %s", t, strerror (errno));
1305 /* Functions for constructing the file name out of URL components. */
1307 /* A growable string structure, used by url_file_name and friends.
1308 This should perhaps be moved to utils.c.
1310 The idea is to have a convenient and efficient way to construct a
1311 string by having various functions append data to it. Instead of
1312 passing the obligatory BASEVAR, SIZEVAR and TAILPOS to all the
1313 functions in questions, we pass the pointer to this struct. */
1321 /* Ensure that the string can accept APPEND_COUNT more characters past
1322 the current TAIL position. If necessary, this will grow the string
1323 and update its allocated size. If the string is already large
1324 enough to take TAIL+APPEND_COUNT characters, this does nothing. */
1325 #define GROW(g, append_size) do { \
1326 struct growable *G_ = g; \
1327 DO_REALLOC (G_->base, G_->size, G_->tail + append_size, char); \
1330 /* Return the tail position of the string. */
1331 #define TAIL(r) ((r)->base + (r)->tail)
1333 /* Move the tail position by APPEND_COUNT characters. */
1334 #define TAIL_INCR(r, append_count) ((r)->tail += append_count)
1336 /* Append the string STR to DEST. NOTICE: the string in DEST is not
1340 append_string (const char *str, struct growable *dest)
1342 int l = strlen (str);
1344 memcpy (TAIL (dest), str, l);
1345 TAIL_INCR (dest, l);
1348 /* Append CH to DEST. For example, append_char (0, DEST)
1349 zero-terminates DEST. */
1352 append_char (char ch, struct growable *dest)
1356 TAIL_INCR (dest, 1);
1360 filechr_not_unix = 1, /* unusable on Unix, / and \0 */
1361 filechr_not_windows = 2, /* unusable on Windows, one of \|/<>?:*" */
1362 filechr_control = 4 /* a control character, e.g. 0-31 */
1365 #define FILE_CHAR_TEST(c, mask) (filechr_table[(unsigned char)(c)] & (mask))
1367 /* Shorthands for the table: */
1368 #define U filechr_not_unix
1369 #define W filechr_not_windows
1370 #define C filechr_control
1375 /* Table of characters unsafe under various conditions (see above).
1377 Arguably we could also claim `%' to be unsafe, since we use it as
1378 the escape character. If we ever want to be able to reliably
1379 translate file name back to URL, this would become important
1380 crucial. Right now, it's better to be minimal in escaping. */
1382 const static unsigned char filechr_table[256] =
1384 UWC, C, C, C, C, C, C, C, /* NUL SOH STX ETX EOT ENQ ACK BEL */
1385 C, C, C, C, C, C, C, C, /* BS HT LF VT FF CR SO SI */
1386 C, C, C, C, C, C, C, C, /* DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
1387 C, C, C, C, C, C, C, C, /* CAN EM SUB ESC FS GS RS US */
1388 0, 0, W, 0, 0, 0, 0, 0, /* SP ! " # $ % & ' */
1389 0, 0, W, 0, 0, 0, 0, UW, /* ( ) * + , - . / */
1390 0, 0, 0, 0, 0, 0, 0, 0, /* 0 1 2 3 4 5 6 7 */
1391 0, 0, W, 0, W, 0, W, W, /* 8 9 : ; < = > ? */
1392 0, 0, 0, 0, 0, 0, 0, 0, /* @ A B C D E F G */
1393 0, 0, 0, 0, 0, 0, 0, 0, /* H I J K L M N O */
1394 0, 0, 0, 0, 0, 0, 0, 0, /* P Q R S T U V W */
1395 0, 0, 0, 0, W, 0, 0, 0, /* X Y Z [ \ ] ^ _ */
1396 0, 0, 0, 0, 0, 0, 0, 0, /* ` a b c d e f g */
1397 0, 0, 0, 0, 0, 0, 0, 0, /* h i j k l m n o */
1398 0, 0, 0, 0, 0, 0, 0, 0, /* p q r s t u v w */
1399 0, 0, 0, 0, 0, 0, 0, 0, /* x y z { | } ~ DEL */
1401 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, /* 128-143 */
1402 C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, C, /* 144-159 */
1403 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1404 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1406 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1407 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1408 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1409 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1417 /* FN_PORT_SEP is the separator between host and port in file names
1418 for non-standard port numbers. On Unix this is normally ':', as in
1419 "www.xemacs.org:4001/index.html". Under Windows, we set it to +
1420 because Windows can't handle ':' in file names. */
1421 #define FN_PORT_SEP (opt.restrict_files_os != restrict_windows ? ':' : '+')
1423 /* FN_QUERY_SEP is the separator between the file name and the URL
1424 query, normally '?'. Since Windows cannot handle '?' as part of
1425 file name, we use '@' instead there. */
1426 #define FN_QUERY_SEP (opt.restrict_files_os != restrict_windows ? '?' : '@')
1428 /* Quote path element, characters in [b, e), as file name, and append
1429 the quoted string to DEST. Each character is quoted as per
1430 file_unsafe_char and the corresponding table.
1432 If ESCAPED_P is non-zero, the path element is considered to be
1433 URL-escaped and will be unescaped prior to inspection. */
1436 append_uri_pathel (const char *b, const char *e, int escaped_p,
1437 struct growable *dest)
1443 if (opt.restrict_files_os == restrict_unix)
1444 mask = filechr_not_unix;
1446 mask = filechr_not_windows;
1447 if (opt.restrict_files_ctrl)
1448 mask |= filechr_control;
1450 /* Copy [b, e) to PATHEL and URL-unescape it. */
1454 BOUNDED_TO_ALLOCA (b, e, unescaped);
1455 url_unescape (unescaped);
1457 e = unescaped + strlen (unescaped);
1460 /* Walk the PATHEL string and check how many characters we'll need
1461 to add for file quoting. */
1463 for (p = b; p < e; p++)
1464 if (FILE_CHAR_TEST (*p, mask))
1467 /* e-b is the string length. Each quoted char means two additional
1468 characters in the string, hence 2*quoted. */
1469 outlen = (e - b) + (2 * quoted);
1470 GROW (dest, outlen);
1474 /* If there's nothing to quote, we don't need to go through the
1475 string the second time. */
1476 memcpy (TAIL (dest), b, outlen);
1480 char *q = TAIL (dest);
1481 for (p = b; p < e; p++)
1483 if (!FILE_CHAR_TEST (*p, mask))
1487 unsigned char ch = *p;
1489 *q++ = XNUM_TO_DIGIT (ch >> 4);
1490 *q++ = XNUM_TO_DIGIT (ch & 0xf);
1493 assert (q - TAIL (dest) == outlen);
1495 TAIL_INCR (dest, outlen);
1498 /* Append to DEST the directory structure that corresponds the
1499 directory part of URL's path. For example, if the URL is
1500 http://server/dir1/dir2/file, this appends "/dir1/dir2".
1502 Each path element ("dir1" and "dir2" in the above example) is
1503 examined, url-unescaped, and re-escaped as file name element.
1505 Additionally, it cuts as many directories from the path as
1506 specified by opt.cut_dirs. For example, if opt.cut_dirs is 1, it
1507 will produce "bar" for the above example. For 2 or more, it will
1510 Each component of the path is quoted for use as file name. */
1513 append_dir_structure (const struct url *u, struct growable *dest)
1515 char *pathel, *next;
1516 int cut = opt.cut_dirs;
1518 /* Go through the path components, de-URL-quote them, and quote them
1519 (if necessary) as file names. */
1522 for (; (next = strchr (pathel, '/')) != NULL; pathel = next + 1)
1527 /* Ignore empty pathels. */
1531 append_char ('/', dest);
1532 append_uri_pathel (pathel, next, 1, dest);
1536 /* Return a unique file name that matches the given URL as good as
1537 possible. Does not create directories on the file system. */
1540 url_file_name (const struct url *u)
1542 struct growable fnres;
1544 char *u_file, *u_query;
1545 char *fname, *unique;
1551 /* Start with the directory prefix, if specified. */
1553 append_string (opt.dir_prefix, &fnres);
1555 /* If "dirstruct" is turned on (typically the case with -r), add
1556 the host and port (unless those have been turned off) and
1557 directory structure. */
1560 if (opt.add_hostdir)
1563 append_char ('/', &fnres);
1564 append_string (u->host, &fnres);
1565 if (u->port != scheme_default_port (u->scheme))
1568 number_to_string (portstr, u->port);
1569 append_char (FN_PORT_SEP, &fnres);
1570 append_string (portstr, &fnres);
1574 append_dir_structure (u, &fnres);
1577 /* Add the file name. */
1579 append_char ('/', &fnres);
1580 u_file = *u->file ? u->file : "index.html";
1581 append_uri_pathel (u_file, u_file + strlen (u_file), 0, &fnres);
1583 /* Append "?query" to the file name. */
1584 u_query = u->query && *u->query ? u->query : NULL;
1587 append_char (FN_QUERY_SEP, &fnres);
1588 append_uri_pathel (u_query, u_query + strlen (u_query), 1, &fnres);
1591 /* Zero-terminate the file name. */
1592 append_char ('\0', &fnres);
1596 /* Check the cases in which the unique extensions are not used:
1597 1) Clobbering is turned off (-nc).
1598 2) Retrieval with regetting.
1599 3) Timestamping is used.
1600 4) Hierarchy is built.
1602 The exception is the case when file does exist and is a
1603 directory (see `mkalldirs' for explanation). */
1605 if ((opt.noclobber || opt.always_rest || opt.timestamping || opt.dirstruct)
1606 && !(file_exists_p (fname) && !file_non_directory_p (fname)))
1609 unique = unique_name (fname, 1);
1610 if (unique != fname)
1615 /* Return the length of URL's path. Path is considered to be
1616 terminated by one of '?', ';', '#', or by the end of the
1619 path_length (const char *url)
1621 const char *q = strpbrk_or_eos (url, "?;#");
1625 /* Find the last occurrence of character C in the range [b, e), or
1626 NULL, if none are present. This is equivalent to strrchr(b, c),
1627 except that it accepts an END argument instead of requiring the
1628 string to be zero-terminated. Why is there no memrchr()? */
1630 find_last_char (const char *b, const char *e, char c)
1638 /* Resolve "." and ".." elements of PATH by destructively modifying
1639 PATH and return non-zero if PATH has been modified, zero otherwise.
1641 The algorithm is in spirit similar to the one described in rfc1808,
1642 although implemented differently, in one pass. To recap, path
1643 elements containing only "." are removed, and ".." is taken to mean
1644 "back up one element". Single leading and trailing slashes are
1647 This function does not handle URL escapes explicitly. If you're
1648 passing paths from URLs, make sure to unquote "%2e" and "%2E" to
1649 ".", so that this function can find the dots. (Wget's URL parser
1650 calls reencode_escapes, which see.)
1652 For example, "a/b/c/./../d/.." will yield "a/b/". More exhaustive
1653 test examples are provided below. If you change anything in this
1654 function, run test_path_simplify to make sure you haven't broken a
1658 path_simplify (char *path)
1662 /* Preserve the leading '/'. */
1666 h = path; /* hare */
1667 t = path; /* tortoise */
1668 end = path + strlen (path);
1672 /* Hare should be at the beginning of a path element. */
1674 if (h[0] == '.' && (h[1] == '/' || h[1] == '\0'))
1679 else if (h[0] == '.' && h[1] == '.' && (h[2] == '/' || h[2] == '\0'))
1681 /* Handle "../" by retreating the tortoise by one path
1682 element -- but not past beggining of PATH. */
1685 /* Move backwards until T hits the beginning of the
1686 previous path element or the beginning of path. */
1687 for (--t; t > path && t[-1] != '/'; t--)
1694 /* Ignore empty path elements. Supporting them well is hard
1695 (where do you save "http://x.com///y.html"?), and they
1696 don't bring any practical gain. Plus, they break our
1697 filesystem-influenced assumptions: allowing them would
1698 make "x/y//../z" simplify to "x/y/z", whereas most people
1699 would expect "x/z". */
1704 /* A regular path element. If H hasn't advanced past T,
1705 simply skip to the next path element. Otherwise, copy
1706 the path element until the next slash. */
1709 /* Skip the path element, including the slash. */
1710 while (h < end && *h != '/')
1717 /* Copy the path element, including the final slash. */
1718 while (h < end && *h != '/')
1732 /* Merge BASE with LINK and return the resulting URI.
1734 Either of the URIs may be absolute or relative, complete with the
1735 host name, or path only. This tries to reasonably handle all
1736 foreseeable cases. It only employs minimal URL parsing, without
1737 knowledge of the specifics of schemes.
1739 Perhaps this function should call path_simplify so that the callers
1740 don't have to call url_parse unconditionally. */
1743 uri_merge (const char *base, const char *link)
1749 if (url_has_scheme (link))
1750 return xstrdup (link);
1752 /* We may not examine BASE past END. */
1753 end = base + path_length (base);
1754 linklength = strlen (link);
1758 /* Empty LINK points back to BASE, query string and all. */
1759 return xstrdup (base);
1761 else if (*link == '?')
1763 /* LINK points to the same location, but changes the query
1764 string. Examples: */
1765 /* uri_merge("path", "?new") -> "path?new" */
1766 /* uri_merge("path?foo", "?new") -> "path?new" */
1767 /* uri_merge("path?foo#bar", "?new") -> "path?new" */
1768 /* uri_merge("path#foo", "?new") -> "path?new" */
1769 int baselength = end - base;
1770 merge = xmalloc (baselength + linklength + 1);
1771 memcpy (merge, base, baselength);
1772 memcpy (merge + baselength, link, linklength);
1773 merge[baselength + linklength] = '\0';
1775 else if (*link == '#')
1777 /* uri_merge("path", "#new") -> "path#new" */
1778 /* uri_merge("path#foo", "#new") -> "path#new" */
1779 /* uri_merge("path?foo", "#new") -> "path?foo#new" */
1780 /* uri_merge("path?foo#bar", "#new") -> "path?foo#new" */
1782 const char *end1 = strchr (base, '#');
1784 end1 = base + strlen (base);
1785 baselength = end1 - base;
1786 merge = xmalloc (baselength + linklength + 1);
1787 memcpy (merge, base, baselength);
1788 memcpy (merge + baselength, link, linklength);
1789 merge[baselength + linklength] = '\0';
1791 else if (*link == '/' && *(link + 1) == '/')
1793 /* LINK begins with "//" and so is a net path: we need to
1794 replace everything after (and including) the double slash
1797 /* uri_merge("foo", "//new/bar") -> "//new/bar" */
1798 /* uri_merge("//old/foo", "//new/bar") -> "//new/bar" */
1799 /* uri_merge("http://old/foo", "//new/bar") -> "http://new/bar" */
1803 const char *start_insert;
1805 /* Look for first slash. */
1806 slash = memchr (base, '/', end - base);
1807 /* If found slash and it is a double slash, then replace
1808 from this point, else default to replacing from the
1810 if (slash && *(slash + 1) == '/')
1811 start_insert = slash;
1813 start_insert = base;
1815 span = start_insert - base;
1816 merge = (char *)xmalloc (span + linklength + 1);
1818 memcpy (merge, base, span);
1819 memcpy (merge + span, link, linklength);
1820 merge[span + linklength] = '\0';
1822 else if (*link == '/')
1824 /* LINK is an absolute path: we need to replace everything
1825 after (and including) the FIRST slash with LINK.
1827 So, if BASE is "http://host/whatever/foo/bar", and LINK is
1828 "/qux/xyzzy", our result should be
1829 "http://host/qux/xyzzy". */
1832 const char *start_insert = NULL; /* for gcc to shut up. */
1833 const char *pos = base;
1834 int seen_slash_slash = 0;
1835 /* We're looking for the first slash, but want to ignore
1838 slash = memchr (pos, '/', end - pos);
1839 if (slash && !seen_slash_slash)
1840 if (*(slash + 1) == '/')
1843 seen_slash_slash = 1;
1847 /* At this point, SLASH is the location of the first / after
1848 "//", or the first slash altogether. START_INSERT is the
1849 pointer to the location where LINK will be inserted. When
1850 examining the last two examples, keep in mind that LINK
1853 if (!slash && !seen_slash_slash)
1854 /* example: "foo" */
1856 start_insert = base;
1857 else if (!slash && seen_slash_slash)
1858 /* example: "http://foo" */
1861 else if (slash && !seen_slash_slash)
1862 /* example: "foo/bar" */
1864 start_insert = base;
1865 else if (slash && seen_slash_slash)
1866 /* example: "http://something/" */
1868 start_insert = slash;
1870 span = start_insert - base;
1871 merge = (char *)xmalloc (span + linklength + 1);
1873 memcpy (merge, base, span);
1874 memcpy (merge + span, link, linklength);
1875 merge[span + linklength] = '\0';
1879 /* LINK is a relative URL: we need to replace everything
1880 after last slash (possibly empty) with LINK.
1882 So, if BASE is "whatever/foo/bar", and LINK is "qux/xyzzy",
1883 our result should be "whatever/foo/qux/xyzzy". */
1884 int need_explicit_slash = 0;
1886 const char *start_insert;
1887 const char *last_slash = find_last_char (base, end, '/');
1890 /* No slash found at all. Append LINK to what we have,
1891 but we'll need a slash as a separator.
1893 Example: if base == "foo" and link == "qux/xyzzy", then
1894 we cannot just append link to base, because we'd get
1895 "fooqux/xyzzy", whereas what we want is
1898 To make sure the / gets inserted, we set
1899 need_explicit_slash to 1. We also set start_insert
1900 to end + 1, so that the length calculations work out
1901 correctly for one more (slash) character. Accessing
1902 that character is fine, since it will be the
1903 delimiter, '\0' or '?'. */
1904 /* example: "foo?..." */
1905 /* ^ ('?' gets changed to '/') */
1906 start_insert = end + 1;
1907 need_explicit_slash = 1;
1909 else if (last_slash && last_slash >= base + 2
1910 && last_slash[-2] == ':' && last_slash[-1] == '/')
1912 /* example: http://host" */
1914 start_insert = end + 1;
1915 need_explicit_slash = 1;
1919 /* example: "whatever/foo/bar" */
1921 start_insert = last_slash + 1;
1924 span = start_insert - base;
1925 merge = (char *)xmalloc (span + linklength + 1);
1927 memcpy (merge, base, span);
1928 if (need_explicit_slash)
1929 merge[span - 1] = '/';
1930 memcpy (merge + span, link, linklength);
1931 merge[span + linklength] = '\0';
1937 #define APPEND(p, s) do { \
1938 int len = strlen (s); \
1939 memcpy (p, s, len); \
1943 /* Use this instead of password when the actual password is supposed
1944 to be hidden. We intentionally use a generic string without giving
1945 away the number of characters in the password, like previous
1947 #define HIDDEN_PASSWORD "*password*"
1949 /* Recreate the URL string from the data in URL.
1951 If HIDE is non-zero (as it is when we're calling this on a URL we
1952 plan to print, but not when calling it to canonicalize a URL for
1953 use within the program), password will be hidden. Unsafe
1954 characters in the URL will be quoted. */
1957 url_string (const struct url *url, int hide_password)
1961 char *quoted_user = NULL, *quoted_passwd = NULL;
1963 int scheme_port = supported_schemes[url->scheme].default_port;
1964 char *scheme_str = supported_schemes[url->scheme].leading_string;
1965 int fplen = full_path_length (url);
1967 int brackets_around_host = 0;
1969 assert (scheme_str != NULL);
1971 /* Make sure the user name and password are quoted. */
1974 quoted_user = url_escape_allow_passthrough (url->user);
1978 quoted_passwd = HIDDEN_PASSWORD;
1980 quoted_passwd = url_escape_allow_passthrough (url->passwd);
1984 if (strchr (url->host, ':'))
1985 brackets_around_host = 1;
1987 size = (strlen (scheme_str)
1988 + strlen (url->host)
1989 + (brackets_around_host ? 2 : 0)
1992 if (url->port != scheme_port)
1993 size += 1 + numdigit (url->port);
1996 size += 1 + strlen (quoted_user);
1998 size += 1 + strlen (quoted_passwd);
2001 p = result = xmalloc (size);
2003 APPEND (p, scheme_str);
2006 APPEND (p, quoted_user);
2010 APPEND (p, quoted_passwd);
2015 if (brackets_around_host)
2017 APPEND (p, url->host);
2018 if (brackets_around_host)
2020 if (url->port != scheme_port)
2023 p = number_to_string (p, url->port);
2026 full_path_write (url, p);
2030 assert (p - result == size);
2032 if (quoted_user && quoted_user != url->user)
2033 xfree (quoted_user);
2034 if (quoted_passwd && !hide_password
2035 && quoted_passwd != url->passwd)
2036 xfree (quoted_passwd);
2041 /* Return non-zero if scheme a is similar to scheme b.
2043 Schemes are similar if they are equal. If SSL is supported, schemes
2044 are also similar if one is http (SCHEME_HTTP) and the other is https
2047 schemes_are_similar_p (enum url_scheme a, enum url_scheme b)
2052 if ((a == SCHEME_HTTP && b == SCHEME_HTTPS)
2053 || (a == SCHEME_HTTPS && b == SCHEME_HTTP))
2060 /* Debugging and testing support for path_simplify. */
2062 /* Debug: run path_simplify on PATH and return the result in a new
2063 string. Useful for calling from the debugger. */
2067 char *copy = xstrdup (path);
2068 path_simplify (copy);
2073 run_test (char *test, char *expected_result, int expected_change)
2075 char *test_copy = xstrdup (test);
2076 int modified = path_simplify (test_copy);
2078 if (0 != strcmp (test_copy, expected_result))
2080 printf ("Failed path_simplify(\"%s\"): expected \"%s\", got \"%s\".\n",
2081 test, expected_result, test_copy);
2083 if (modified != expected_change)
2085 if (expected_change == 1)
2086 printf ("Expected no modification with path_simplify(\"%s\").\n",
2089 printf ("Expected modification with path_simplify(\"%s\").\n",
2096 test_path_simplify (void)
2099 char *test, *result;
2105 { "foo", "foo", 0 },
2106 { "foo/bar", "foo/bar", 0 },
2107 { "foo///bar", "foo/bar", 1 },
2108 { "foo/.", "foo/", 1 },
2109 { "foo/./", "foo/", 1 },
2110 { "foo./", "foo./", 0 },
2111 { "foo/../bar", "bar", 1 },
2112 { "foo/../bar/", "bar/", 1 },
2113 { "foo/bar/..", "foo/", 1 },
2114 { "foo/bar/../x", "foo/x", 1 },
2115 { "foo/bar/../x/", "foo/x/", 1 },
2116 { "foo/..", "", 1 },
2117 { "foo/../..", "", 1 },
2118 { "a/b/../../c", "c", 1 },
2119 { "./a/../b", "b", 1 }
2123 for (i = 0; i < countof (tests); i++)
2125 char *test = tests[i].test;
2126 char *expected_result = tests[i].result;
2127 int expected_change = tests[i].should_modify;
2128 run_test (test, expected_result, expected_change);
2131 /* Now run all the tests with a leading slash before the test case,
2132 to prove that the slash is being preserved. */
2133 for (i = 0; i < countof (tests); i++)
2135 char *test, *expected_result;
2136 int expected_change = tests[i].should_modify;
2138 test = xmalloc (1 + strlen (tests[i].test) + 1);
2139 sprintf (test, "/%s", tests[i].test);
2141 expected_result = xmalloc (1 + strlen (tests[i].result) + 1);
2142 sprintf (expected_result, "/%s", tests[i].result);
2144 run_test (test, expected_result, expected_change);
2147 xfree (expected_result);