mirror of
https://github.com/moparisthebest/wget
synced 2024-07-03 16:38:41 -04:00
[svn] Minor fixes and cosmetic changes.
(uri_merge): Get rid of uri_merge_1. (uri_merge): Merge "foo//", "bar" as "foo//bar", not "foo///bar", i.e. don't add an extra slash merely because BASE ends with two slashes. (parse_credentials): Renamed from parse_uname. Rewrittern in standard [beg, end) calling style. (url_skip_credentials): Renamed from url_skip_uname. Made static. (url_skip_credentials): Include # and ; as terminators. Old code would mistakenly consider "http://foo.com#hniksic@iskon.hr" to contain a username. (url_skip_scheme): Removed because it was unused. (url_has_scheme): Require "scheme" to be at least one char long.
This commit is contained in:
hniksic
parent
a504d10ed5
commit
101f896e47
@ -1,3 +1,18 @@
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2003-09-20 Hrvoje Niksic <hniksic@xemacs.org>
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* url.c (uri_merge): Get rid of uri_merge_1.
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(uri_merge): Merge "foo//", "bar" as "foo//bar", not "foo///bar",
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i.e. don't add an extra slash merely because BASE ends with two
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slashes.
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(parse_credentials): Renamed from parse_uname. Rewrittern in
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standard [beg, end) calling style.
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(url_skip_credentials): Renamed from url_skip_uname. Made static.
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(url_skip_credentials): Include # and ; as terminators. Old code
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would mistakenly consider "http://foo.com#hniksic@iskon.hr" to
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contain a username.
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(url_skip_scheme): Removed because it was unused.
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(url_has_scheme): Require "scheme" to be at least one char long.
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2003-09-19 Hrvoje Niksic <hniksic@xemacs.org>
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* url.c (url_file_name): Expect NULL dir_prefix.
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536
src/url.c
536
src/url.c
@ -409,6 +409,7 @@ reencode_escapes (const char *s)
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/* Returns the scheme type if the scheme is supported, or
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SCHEME_INVALID if not. */
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enum url_scheme
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url_scheme (const char *url)
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{
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@ -427,37 +428,25 @@ url_scheme (const char *url)
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return SCHEME_INVALID;
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}
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/* Return the number of characters needed to skip the scheme part of
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the URL, e.g. `http://'. If no scheme is found, returns 0. */
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int
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url_skip_scheme (const char *url)
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{
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const char *p = url;
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#define SCHEME_CHAR(ch) (ISALNUM (ch) || (ch) == '-' || (ch) == '+')
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/* Skip the scheme name. We allow `-' and `+' because of `whois++',
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etc. */
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while (ISALNUM (*p) || *p == '-' || *p == '+')
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++p;
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if (*p != ':')
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return 0;
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/* Skip ':'. */
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++p;
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/* Return 1 if the URL begins with any "scheme", 0 otherwise. As
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currently implemented, it returns true if URL begins with
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[-+a-zA-Z0-9]+: . */
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/* Skip "//" if found. */
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if (*p == '/' && *(p + 1) == '/')
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p += 2;
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return p - url;
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}
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/* Returns 1 if the URL begins with a scheme (supported or
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unsupported), 0 otherwise. */
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int
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url_has_scheme (const char *url)
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{
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const char *p = url;
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while (ISALNUM (*p) || *p == '-' || *p == '+')
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/* The first char must be a scheme char. */
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if (!*p || !SCHEME_CHAR (*p))
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return 0;
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++p;
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/* Followed by 0 or more scheme chars. */
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while (*p && SCHEME_CHAR (*p))
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++p;
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/* Terminated by ':'. */
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return *p == ':';
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}
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@ -474,57 +463,51 @@ scheme_disable (enum url_scheme scheme)
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}
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/* Skip the username and password, if present here. The function
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should be called *not* with the complete URL, but with the part
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should *not* be called with the complete URL, but with the part
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right after the scheme.
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If no username and password are found, return 0. */
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int
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url_skip_uname (const char *url)
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{
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const char *p;
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/* Look for '@' that comes before '/' or '?'. */
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p = (const char *)strpbrk (url, "/?@");
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if (!p || *p != '@')
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return 0;
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return p - url + 1;
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}
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static int
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parse_uname (const char *str, int len, char **user, char **passwd)
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url_skip_credentials (const char *url)
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{
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/* Look for '@' that comes before terminators, such as '/', '?',
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'#', or ';'. */
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const char *p = (const char *)strpbrk (url, "@/?#;");
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if (!p || *p != '@')
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return 0;
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return p + 1 - url;
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}
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/* Parse credentials contained in [BEG, END). The region is expected
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to have come from a URL and is unescaped. */
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static int
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parse_credentials (const char *beg, const char *end, char **user, char **passwd)
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{
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char *colon;
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const char *userend;
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if (len == 0)
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/* Empty user name not allowed. */
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return 0;
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if (beg == end)
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return 0; /* empty user name */
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colon = memchr (str, ':', len);
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if (colon == str)
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/* Empty user name again. */
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return 0;
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colon = memchr (beg, ':', end - beg);
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if (colon == beg)
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return 0; /* again empty user name */
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if (colon)
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{
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int pwlen = len - (colon + 1 - str);
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*passwd = xmalloc (pwlen + 1);
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memcpy (*passwd, colon + 1, pwlen);
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(*passwd)[pwlen] = '\0';
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len -= pwlen + 1;
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*passwd = strdupdelim (colon + 1, end);
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userend = colon;
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url_unescape (*passwd);
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}
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else
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*passwd = NULL;
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*user = xmalloc (len + 1);
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memcpy (*user, str, len);
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(*user)[len] = '\0';
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if (*user)
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url_unescape (*user);
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if (*passwd)
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url_unescape (*passwd);
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{
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*passwd = NULL;
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userend = end;
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}
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*user = strdupdelim (beg, userend);
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url_unescape (*user);
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return 1;
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}
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@ -540,6 +523,7 @@ parse_uname (const char *str, int len, char **user, char **passwd)
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foo.bar.com:/absdir/file -> ftp://foo.bar.com//absdir/file
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If the URL needs not or cannot be rewritten, return NULL. */
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char *
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rewrite_shorthand_url (const char *url)
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{
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@ -586,7 +570,7 @@ rewrite_shorthand_url (const char *url)
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}
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}
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static void parse_path PARAMS ((const char *, char **, char **));
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static void split_path PARAMS ((const char *, char **, char **));
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/* Like strpbrk, with the exception that it returns the pointer to the
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terminating zero (end-of-string aka "eos") if no matching character
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@ -835,7 +819,7 @@ url_parse (const char *url, int *error)
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p += strlen (supported_schemes[scheme].leading_string);
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uname_b = p;
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p += url_skip_uname (p);
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p += url_skip_credentials (p);
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uname_e = p;
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/* scheme://user:pass@host[:port]... */
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@ -979,7 +963,7 @@ url_parse (const char *url, int *error)
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/* http://user:pass@host */
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/* ^ ^ */
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/* uname_b uname_e */
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if (!parse_uname (uname_b, uname_e - uname_b - 1, &user, &passwd))
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if (!parse_credentials (uname_b, uname_e - 1, &user, &passwd))
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{
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SETERR (error, PE_INVALID_USER_NAME);
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return NULL;
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@ -997,7 +981,7 @@ url_parse (const char *url, int *error)
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u->path = strdupdelim (path_b, path_e);
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path_modified = path_simplify (u->path);
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parse_path (u->path, &u->dir, &u->file);
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split_path (u->path, &u->dir, &u->file);
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host_modified = lowercase_str (u->host);
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@ -1037,15 +1021,25 @@ url_error (int error_code)
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return parse_errors[error_code];
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}
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/* Parse PATH into dir and file. PATH is extracted from the URL and
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is URL-escaped. The function returns unescaped DIR and FILE. */
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/* Split PATH into DIR and FILE. PATH comes from the URL and is
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expected to be URL-escaped.
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The path is split into directory (the part up to the last slash)
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and file (the part after the last slash), which are subsequently
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unescaped. Examples:
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PATH DIR FILE
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"foo/bar/baz" "foo/bar" "baz"
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"foo/bar/" "foo/bar" ""
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"foo" "" "foo"
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"foo/bar/baz%2fqux" "foo/bar" "baz/qux" (!)
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DIR and FILE are freshly allocated. */
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static void
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parse_path (const char *path, char **dir, char **file)
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split_path (const char *path, char **dir, char **file)
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{
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char *last_slash;
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last_slash = strrchr (path, '/');
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char *last_slash = strrchr (path, '/');
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if (!last_slash)
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{
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*dir = xstrdup ("");
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@ -1865,221 +1859,209 @@ path_simplify (char *path)
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return change;
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}
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/* Resolve the result of "linking" a base URI (BASE) to a
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link-specified URI (LINK).
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/* Merge BASE with LINK and return the resulting URI.
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Either of the URIs may be absolute or relative, complete with the
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host name, or path only. This tries to behave "reasonably" in all
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foreseeable cases. It employs little specific knowledge about
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schemes or URL-specific stuff -- it just works on strings.
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The parameters LINKLENGTH is useful if LINK is not zero-terminated.
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See uri_merge for a gentler interface to this functionality.
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host name, or path only. This tries to reasonably handle all
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foreseeable cases. It only employs minimal URL parsing, without
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knowledge of the specifics of schemes.
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Perhaps this function should call path_simplify so that the callers
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don't have to call url_parse unconditionally. */
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static char *
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uri_merge_1 (const char *base, const char *link, int linklength, int no_scheme)
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{
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char *constr;
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if (no_scheme)
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{
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const char *end = base + path_length (base);
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if (!*link)
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{
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/* Empty LINK points back to BASE, query string and all. */
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constr = xstrdup (base);
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}
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else if (*link == '?')
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{
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/* LINK points to the same location, but changes the query
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string. Examples: */
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/* uri_merge("path", "?new") -> "path?new" */
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/* uri_merge("path?foo", "?new") -> "path?new" */
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/* uri_merge("path?foo#bar", "?new") -> "path?new" */
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/* uri_merge("path#foo", "?new") -> "path?new" */
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int baselength = end - base;
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constr = xmalloc (baselength + linklength + 1);
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memcpy (constr, base, baselength);
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memcpy (constr + baselength, link, linklength);
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constr[baselength + linklength] = '\0';
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}
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else if (*link == '#')
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{
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/* uri_merge("path", "#new") -> "path#new" */
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/* uri_merge("path#foo", "#new") -> "path#new" */
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/* uri_merge("path?foo", "#new") -> "path?foo#new" */
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/* uri_merge("path?foo#bar", "#new") -> "path?foo#new" */
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int baselength;
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const char *end1 = strchr (base, '#');
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if (!end1)
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end1 = base + strlen (base);
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baselength = end1 - base;
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constr = xmalloc (baselength + linklength + 1);
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memcpy (constr, base, baselength);
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memcpy (constr + baselength, link, linklength);
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constr[baselength + linklength] = '\0';
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}
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else if (linklength > 1 && *link == '/' && *(link + 1) == '/')
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{
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/* LINK begins with "//" and so is a net path: we need to
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replace everything after (and including) the double slash
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with LINK. */
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/* uri_merge("foo", "//new/bar") -> "//new/bar" */
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/* uri_merge("//old/foo", "//new/bar") -> "//new/bar" */
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/* uri_merge("http://old/foo", "//new/bar") -> "http://new/bar" */
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int span;
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const char *slash;
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const char *start_insert;
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/* Look for first slash. */
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slash = memchr (base, '/', end - base);
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/* If found slash and it is a double slash, then replace
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from this point, else default to replacing from the
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beginning. */
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if (slash && *(slash + 1) == '/')
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start_insert = slash;
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else
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start_insert = base;
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span = start_insert - base;
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constr = (char *)xmalloc (span + linklength + 1);
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if (span)
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memcpy (constr, base, span);
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memcpy (constr + span, link, linklength);
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constr[span + linklength] = '\0';
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}
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else if (*link == '/')
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{
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/* LINK is an absolute path: we need to replace everything
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after (and including) the FIRST slash with LINK.
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So, if BASE is "http://host/whatever/foo/bar", and LINK is
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"/qux/xyzzy", our result should be
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"http://host/qux/xyzzy". */
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int span;
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const char *slash;
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const char *start_insert = NULL; /* for gcc to shut up. */
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const char *pos = base;
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int seen_slash_slash = 0;
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/* We're looking for the first slash, but want to ignore
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double slash. */
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again:
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slash = memchr (pos, '/', end - pos);
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if (slash && !seen_slash_slash)
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if (*(slash + 1) == '/')
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{
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pos = slash + 2;
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seen_slash_slash = 1;
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goto again;
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}
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/* At this point, SLASH is the location of the first / after
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"//", or the first slash altogether. START_INSERT is the
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pointer to the location where LINK will be inserted. When
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examining the last two examples, keep in mind that LINK
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begins with '/'. */
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if (!slash && !seen_slash_slash)
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/* example: "foo" */
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/* ^ */
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start_insert = base;
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else if (!slash && seen_slash_slash)
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/* example: "http://foo" */
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/* ^ */
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start_insert = end;
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else if (slash && !seen_slash_slash)
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/* example: "foo/bar" */
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/* ^ */
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start_insert = base;
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else if (slash && seen_slash_slash)
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/* example: "http://something/" */
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/* ^ */
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start_insert = slash;
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span = start_insert - base;
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constr = (char *)xmalloc (span + linklength + 1);
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if (span)
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memcpy (constr, base, span);
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if (linklength)
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memcpy (constr + span, link, linklength);
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constr[span + linklength] = '\0';
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}
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else
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{
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/* LINK is a relative URL: we need to replace everything
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after last slash (possibly empty) with LINK.
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So, if BASE is "whatever/foo/bar", and LINK is "qux/xyzzy",
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our result should be "whatever/foo/qux/xyzzy". */
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int need_explicit_slash = 0;
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int span;
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const char *start_insert;
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const char *last_slash = find_last_char (base, end, '/');
|
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if (!last_slash)
|
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{
|
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/* No slash found at all. Append LINK to what we have,
|
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but we'll need a slash as a separator.
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|
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Example: if base == "foo" and link == "qux/xyzzy", then
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we cannot just append link to base, because we'd get
|
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"fooqux/xyzzy", whereas what we want is
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"foo/qux/xyzzy".
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To make sure the / gets inserted, we set
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need_explicit_slash to 1. We also set start_insert
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to end + 1, so that the length calculations work out
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correctly for one more (slash) character. Accessing
|
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that character is fine, since it will be the
|
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delimiter, '\0' or '?'. */
|
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/* example: "foo?..." */
|
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/* ^ ('?' gets changed to '/') */
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start_insert = end + 1;
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need_explicit_slash = 1;
|
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}
|
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else if (last_slash && last_slash != base && *(last_slash - 1) == '/')
|
||||
{
|
||||
/* example: http://host" */
|
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/* ^ */
|
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start_insert = end + 1;
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need_explicit_slash = 1;
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}
|
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else
|
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{
|
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/* example: "whatever/foo/bar" */
|
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/* ^ */
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start_insert = last_slash + 1;
|
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}
|
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|
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span = start_insert - base;
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constr = (char *)xmalloc (span + linklength + 1);
|
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if (span)
|
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memcpy (constr, base, span);
|
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if (need_explicit_slash)
|
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constr[span - 1] = '/';
|
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if (linklength)
|
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memcpy (constr + span, link, linklength);
|
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constr[span + linklength] = '\0';
|
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}
|
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}
|
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else /* !no_scheme */
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{
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constr = strdupdelim (link, link + linklength);
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}
|
||||
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));
|
||||
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;
|
||||
|
||||
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 == '/')
|
||||
{
|
||||
/* 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;
|
||||
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)
|
||||
{
|
||||
/* 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 + 2
|
||||
&& last_slash[-2] == ':' && 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;
|
||||
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';
|
||||
}
|
||||
|
||||
return merge;
|
||||
}
|
||||
|
||||
#define APPEND(p, s) do { \
|
||||
|
||||
@ -140,13 +140,10 @@ void url_set_file PARAMS ((struct url *, const char *));
|
||||
void url_free PARAMS ((struct url *));
|
||||
|
||||
enum url_scheme url_scheme PARAMS ((const char *));
|
||||
int url_skip_scheme PARAMS ((const char *));
|
||||
int url_has_scheme PARAMS ((const char *));
|
||||
int scheme_default_port PARAMS ((enum url_scheme));
|
||||
void scheme_disable PARAMS ((enum url_scheme));
|
||||
|
||||
int url_skip_uname PARAMS ((const char *));
|
||||
|
||||
char *url_string PARAMS ((const struct url *, int));
|
||||
|
||||
struct urlpos *get_urls_file PARAMS ((const char *));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user