extern int errno;
#endif
-/* Is X "."? */
-#define DOTP(x) ((*(x) == '.') && (!*(x + 1)))
-/* Is X ".."? */
-#define DDOTP(x) ((*(x) == '.') && (*(x + 1) == '.') && (!*(x + 2)))
-
-static const int NS_INADDRSZ = 4;
-static const int NS_IN6ADDRSZ = 16;
-static const int NS_INT16SZ = 2;
-
-
struct scheme_data
{
char *leading_string;
/* Forward declarations: */
-static char *construct_relative PARAMS ((const char *, const char *));
static int path_simplify PARAMS ((char *));
-
-
\f
/* Support for encoding and decoding of URL strings. We determine
whether a character is unsafe through static table lookup. This
\f
/* Returns the scheme type if the scheme is supported, or
SCHEME_INVALID if not. */
+
enum url_scheme
url_scheme (const char *url)
{
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;
+#define SCHEME_CHAR(ch) (ISALNUM (ch) || (ch) == '-' || (ch) == '+')
- /* Skip "//" if found. */
- if (*p == '/' && *(p + 1) == '/')
- p += 2;
+/* 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]+: . */
- return p - url;
-}
-
-/* Returns 1 if the URL begins with a scheme (supported or
- unsupported), 0 otherwise. */
int
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 0;
+ ++p;
+ /* Followed by 0 or more scheme chars. */
+ while (*p && SCHEME_CHAR (*p))
++p;
+ /* Terminated by ':'. */
return *p == ':';
}
}
/* Skip the username and password, if present here. The function
- should be called *not* with the complete URL, but with the part
+ should *not* be called with the complete URL, but with the part
right after the scheme.
If no username and password are found, return 0. */
-int
-url_skip_uname (const char *url)
-{
- const char *p;
- /* Look for '@' that comes before '/' or '?'. */
- p = (const char *)strpbrk (url, "/?@");
+static int
+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 p + 1 - url;
}
+/* Parse credentials contained in [BEG, END). The region is expected
+ to have come from a URL and is unescaped. */
+
static int
-parse_uname (const char *str, int len, char **user, char **passwd)
+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 0; /* 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 0; /* 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);
-
+ {
+ *passwd = NULL;
+ userend = end;
+ }
+ *user = strdupdelim (beg, userend);
+ url_unescape (*user);
return 1;
}
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)
{
}
}
\f
-static void parse_path PARAMS ((const char *, char **, char **));
+static void split_path PARAMS ((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
return 1;
}
+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)
{
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]... */
/* http://user:pass@host */
/* ^ ^ */
/* uname_b uname_e */
- if (!parse_uname (uname_b, uname_e - uname_b - 1, &user, &passwd))
+ if (!parse_credentials (uname_b, uname_e - 1, &user, &passwd))
{
SETERR (error, PE_INVALID_USER_NAME);
return NULL;
u->path = strdupdelim (path_b, path_e);
path_modified = path_simplify (u->path);
- parse_path (u->path, &u->dir, &u->file);
+ split_path (u->path, &u->dir, &u->file);
host_modified = lowercase_str (u->host);
return 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 ("");
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. */
int
fnres.tail = 0;
/* Start with the directory prefix, if specified. */
- if (!DOTP (opt.dir_prefix))
+ if (opt.dir_prefix)
append_string (opt.dir_prefix, &fnres);
/* If "dirstruct" is turned on (typically the case with -r), add
if (*(p + 1) == '/')
{
change = 1;
- memmove (p, p + 2, end - p);
+ memmove (p, p + 2, end - (p + 2));
end -= 2;
goto again;
}
return change;
}
\f
-/* Resolve the result of "linking" a base URI (BASE) to a
- link-specified URI (LINK).
+/* 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.
-
- The parameters LINKLENGTH is useful if LINK is not zero-terminated.
- See uri_merge for a gentler interface to this functionality.
+ 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.
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 = base + path_length (base);
+ linklength = strlen (link);
+
+ if (!*link)
+ {
+ /* 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
+ start_insert = base;
- if (no_scheme)
+ span = start_insert - base;
+ merge = (char *)xmalloc (span + linklength + 1);
+ if (span)
+ memcpy (merge, base, span);
+ memcpy (merge + span, link, linklength);
+ merge[span + linklength] = '\0';
+ }
+ else if (*link == '/')
{
- const char *end = base + path_length (base);
+ /* 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;
+ }
- 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) == '/')
+ /* 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 = (char *)xmalloc (span + linklength + 1);
+ if (span)
+ memcpy (merge, base, span);
+ memcpy (merge + span, link, linklength);
+ merge[span + linklength] = '\0';
+ }
+ 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)
{
- /* 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';
+ /* 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 (*link == '/')
+ else if (last_slash && last_slash >= base + 2
+ && last_slash[-2] == ':' && last_slash[-1] == '/')
{
- /* 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';
+ /* example: http://host" */
+ /* ^ */
+ start_insert = end + 1;
+ need_explicit_slash = 1;
}
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';
+ /* example: "whatever/foo/bar" */
+ /* ^ */
+ start_insert = last_slash + 1;
}
+
+ span = start_insert - base;
+ merge = (char *)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';
}
- else /* !no_scheme */
- {
- constr = strdupdelim (link, link + linklength);
- }
- 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));
+ return merge;
}
\f
#define APPEND(p, s) do { \
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;
-
- switch (u->scheme)
- {
- case SCHEME_HTTP:
- proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
- break;
-#ifdef HAVE_SSL
- case SCHEME_HTTPS:
- proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
- break;
-#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;
-}
-\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)
-{
- const char *file_sans_qmark;
- int qm;
-
- if (!opt.html_extension)
- return html_quote_string (file);
-
- qm = count_char (file, '?');
-
- if (qm)
- {
- 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;
- }
- 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;
- }
-
- 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;
-}
-
-static int
-df_free_mapper (void *key, void *value, void *ignored)
-{
- xfree (key);
- return 0;
-}
-
-void
-downloaded_files_free (void)
-{
- if (downloaded_files_hash)
- {
- hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
- hash_table_destroy (downloaded_files_hash);
- downloaded_files_hash = NULL;
- }
-}
-
/* Return non-zero if scheme a is similar to scheme b.
Schemes are similar if they are equal. If SSL is supported, schemes
projects / wget / blobdiff