2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 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 3 of the License, or
10 (at 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, see <http://www.gnu.org/licenses/>.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
56 # include "http-ntlm.h"
69 extern char *version_string;
72 static char *create_authorization_line (const char *, const char *,
73 const char *, const char *,
74 const char *, bool *);
75 static char *basic_authentication_encode (const char *, const char *);
76 static bool known_authentication_scheme_p (const char *, const char *);
77 static void load_cookies (void);
80 # define MIN(x, y) ((x) > (y) ? (y) : (x))
84 static bool cookies_loaded_p;
85 static struct cookie_jar *wget_cookie_jar;
87 #define TEXTHTML_S "text/html"
88 #define TEXTXHTML_S "application/xhtml+xml"
90 /* Some status code validation macros: */
91 #define H_20X(x) (((x) >= 200) && ((x) < 300))
92 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
93 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
94 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
95 || (x) == HTTP_STATUS_SEE_OTHER \
96 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
98 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
100 #define HTTP_STATUS_OK 200
101 #define HTTP_STATUS_CREATED 201
102 #define HTTP_STATUS_ACCEPTED 202
103 #define HTTP_STATUS_NO_CONTENT 204
104 #define HTTP_STATUS_PARTIAL_CONTENTS 206
106 /* Redirection 3xx. */
107 #define HTTP_STATUS_MULTIPLE_CHOICES 300
108 #define HTTP_STATUS_MOVED_PERMANENTLY 301
109 #define HTTP_STATUS_MOVED_TEMPORARILY 302
110 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
111 #define HTTP_STATUS_NOT_MODIFIED 304
112 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
114 /* Client error 4xx. */
115 #define HTTP_STATUS_BAD_REQUEST 400
116 #define HTTP_STATUS_UNAUTHORIZED 401
117 #define HTTP_STATUS_FORBIDDEN 403
118 #define HTTP_STATUS_NOT_FOUND 404
119 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
121 /* Server errors 5xx. */
122 #define HTTP_STATUS_INTERNAL 500
123 #define HTTP_STATUS_NOT_IMPLEMENTED 501
124 #define HTTP_STATUS_BAD_GATEWAY 502
125 #define HTTP_STATUS_UNAVAILABLE 503
128 rel_none, rel_name, rel_value, rel_both
135 struct request_header {
137 enum rp release_policy;
139 int hcount, hcapacity;
142 /* Create a new, empty request. At least request_set_method must be
143 called before the request can be used. */
145 static struct request *
148 struct request *req = xnew0 (struct request);
150 req->headers = xnew_array (struct request_header, req->hcapacity);
154 /* Set the request's method and its arguments. METH should be a
155 literal string (or it should outlive the request) because it will
156 not be freed. ARG will be freed by request_free. */
159 request_set_method (struct request *req, const char *meth, char *arg)
165 /* Return the method string passed with the last call to
166 request_set_method. */
169 request_method (const struct request *req)
174 /* Free one header according to the release policy specified with
175 request_set_header. */
178 release_header (struct request_header *hdr)
180 switch (hdr->release_policy)
197 /* Set the request named NAME to VALUE. Specifically, this means that
198 a "NAME: VALUE\r\n" header line will be used in the request. If a
199 header with the same name previously existed in the request, its
200 value will be replaced by this one. A NULL value means do nothing.
202 RELEASE_POLICY determines whether NAME and VALUE should be released
203 (freed) with request_free. Allowed values are:
205 - rel_none - don't free NAME or VALUE
206 - rel_name - free NAME when done
207 - rel_value - free VALUE when done
208 - rel_both - free both NAME and VALUE when done
210 Setting release policy is useful when arguments come from different
211 sources. For example:
213 // Don't free literal strings!
214 request_set_header (req, "Pragma", "no-cache", rel_none);
216 // Don't free a global variable, we'll need it later.
217 request_set_header (req, "Referer", opt.referer, rel_none);
219 // Value freshly allocated, free it when done.
220 request_set_header (req, "Range",
221 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
226 request_set_header (struct request *req, char *name, char *value,
227 enum rp release_policy)
229 struct request_header *hdr;
234 /* A NULL value is a no-op; if freeing the name is requested,
235 free it now to avoid leaks. */
236 if (release_policy == rel_name || release_policy == rel_both)
241 for (i = 0; i < req->hcount; i++)
243 hdr = &req->headers[i];
244 if (0 == strcasecmp (name, hdr->name))
246 /* Replace existing header. */
247 release_header (hdr);
250 hdr->release_policy = release_policy;
255 /* Install new header. */
257 if (req->hcount >= req->hcapacity)
259 req->hcapacity <<= 1;
260 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
262 hdr = &req->headers[req->hcount++];
265 hdr->release_policy = release_policy;
268 /* Like request_set_header, but sets the whole header line, as
269 provided by the user using the `--header' option. For example,
270 request_set_user_header (req, "Foo: bar") works just like
271 request_set_header (req, "Foo", "bar"). */
274 request_set_user_header (struct request *req, const char *header)
277 const char *p = strchr (header, ':');
280 BOUNDED_TO_ALLOCA (header, p, name);
284 request_set_header (req, xstrdup (name), (char *) p, rel_name);
287 /* Remove the header with specified name from REQ. Returns true if
288 the header was actually removed, false otherwise. */
291 request_remove_header (struct request *req, char *name)
294 for (i = 0; i < req->hcount; i++)
296 struct request_header *hdr = &req->headers[i];
297 if (0 == strcasecmp (name, hdr->name))
299 release_header (hdr);
300 /* Move the remaining headers by one. */
301 if (i < req->hcount - 1)
302 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
310 #define APPEND(p, str) do { \
311 int A_len = strlen (str); \
312 memcpy (p, str, A_len); \
316 /* Construct the request and write it to FD using fd_write. */
319 request_send (const struct request *req, int fd)
321 char *request_string, *p;
322 int i, size, write_error;
324 /* Count the request size. */
327 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
328 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
330 for (i = 0; i < req->hcount; i++)
332 struct request_header *hdr = &req->headers[i];
333 /* NAME ": " VALUE "\r\n" */
334 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
340 p = request_string = alloca_array (char, size);
342 /* Generate the request. */
344 APPEND (p, req->method); *p++ = ' ';
345 APPEND (p, req->arg); *p++ = ' ';
346 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
348 for (i = 0; i < req->hcount; i++)
350 struct request_header *hdr = &req->headers[i];
351 APPEND (p, hdr->name);
352 *p++ = ':', *p++ = ' ';
353 APPEND (p, hdr->value);
354 *p++ = '\r', *p++ = '\n';
357 *p++ = '\r', *p++ = '\n', *p++ = '\0';
358 assert (p - request_string == size);
362 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
364 /* Send the request to the server. */
366 write_error = fd_write (fd, request_string, size - 1, -1);
368 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
373 /* Release the resources used by REQ. */
376 request_free (struct request *req)
379 xfree_null (req->arg);
380 for (i = 0; i < req->hcount; i++)
381 release_header (&req->headers[i]);
382 xfree_null (req->headers);
386 static struct hash_table *basic_authed_hosts;
388 /* Find out if this host has issued a Basic challenge yet; if so, give
389 * it the username, password. A temporary measure until we can get
390 * proper authentication in place. */
393 maybe_send_basic_creds (const char *hostname, const char *user,
394 const char *passwd, struct request *req)
396 int did_challenge = 0;
398 if (basic_authed_hosts
399 && hash_table_contains(basic_authed_hosts, hostname))
401 DEBUGP(("Found `%s' in basic_authed_hosts.\n", hostname));
402 request_set_header (req, "Authorization",
403 basic_authentication_encode (user, passwd),
409 DEBUGP(("Host `%s' has not issued a general basic challenge.\n",
412 return did_challenge;
416 register_basic_auth_host (const char *hostname)
418 if (!basic_authed_hosts)
420 basic_authed_hosts = make_nocase_string_hash_table (1);
422 if (!hash_table_contains(basic_authed_hosts, hostname))
424 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
425 DEBUGP(("Inserted `%s' into basic_authed_hosts\n", hostname));
430 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
431 PROMISED_SIZE bytes are sent over the wire -- if the file is
432 longer, read only that much; if the file is shorter, report an error. */
435 post_file (int sock, const char *file_name, wgint promised_size)
437 static char chunk[8192];
442 DEBUGP (("[writing POST file %s ... ", file_name));
444 fp = fopen (file_name, "rb");
447 while (!feof (fp) && written < promised_size)
450 int length = fread (chunk, 1, sizeof (chunk), fp);
453 towrite = MIN (promised_size - written, length);
454 write_error = fd_write (sock, chunk, towrite, -1);
464 /* If we've written less than was promised, report a (probably
465 nonsensical) error rather than break the promise. */
466 if (written < promised_size)
472 assert (written == promised_size);
473 DEBUGP (("done]\n"));
477 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
478 If so, return the pointer to the position after the line, otherwise
479 return NULL. This is used as callback to fd_read_hunk. The data
480 between START and PEEKED has been read and cannot be "unread"; the
481 data after PEEKED has only been peeked. */
484 response_head_terminator (const char *start, const char *peeked, int peeklen)
488 /* If at first peek, verify whether HUNK starts with "HTTP". If
489 not, this is a HTTP/0.9 request and we must bail out without
491 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
494 /* Look for "\n[\r]\n", and return the following position if found.
495 Start two chars before the current to cover the possibility that
496 part of the terminator (e.g. "\n\r") arrived in the previous
498 p = peeked - start < 2 ? start : peeked - 2;
499 end = peeked + peeklen;
501 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
502 for (; p < end - 2; p++)
505 if (p[1] == '\r' && p[2] == '\n')
507 else if (p[1] == '\n')
510 /* p==end-2: check for \n\n directly preceding END. */
511 if (p[0] == '\n' && p[1] == '\n')
517 /* The maximum size of a single HTTP response we care to read. Rather
518 than being a limit of the reader implementation, this limit
519 prevents Wget from slurping all available memory upon encountering
520 malicious or buggy server output, thus protecting the user. Define
521 it to 0 to remove the limit. */
523 #define HTTP_RESPONSE_MAX_SIZE 65536
525 /* Read the HTTP request head from FD and return it. The error
526 conditions are the same as with fd_read_hunk.
528 To support HTTP/0.9 responses, this function tries to make sure
529 that the data begins with "HTTP". If this is not the case, no data
530 is read and an empty request is returned, so that the remaining
531 data can be treated as body. */
534 read_http_response_head (int fd)
536 return fd_read_hunk (fd, response_head_terminator, 512,
537 HTTP_RESPONSE_MAX_SIZE);
541 /* The response data. */
544 /* The array of pointers that indicate where each header starts.
545 For example, given this HTTP response:
552 The headers are located like this:
554 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
556 headers[0] headers[1] headers[2] headers[3]
558 I.e. headers[0] points to the beginning of the request,
559 headers[1] points to the end of the first header and the
560 beginning of the second one, etc. */
562 const char **headers;
565 /* Create a new response object from the text of the HTTP response,
566 available in HEAD. That text is automatically split into
567 constituent header lines for fast retrieval using
570 static struct response *
571 resp_new (const char *head)
576 struct response *resp = xnew0 (struct response);
581 /* Empty head means that we're dealing with a headerless
582 (HTTP/0.9) response. In that case, don't set HEADERS at
587 /* Split HEAD into header lines, so that resp_header_* functions
588 don't need to do this over and over again. */
594 DO_REALLOC (resp->headers, size, count + 1, const char *);
595 resp->headers[count++] = hdr;
597 /* Break upon encountering an empty line. */
598 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
601 /* Find the end of HDR, including continuations. */
604 const char *end = strchr (hdr, '\n');
610 while (*hdr == ' ' || *hdr == '\t');
612 DO_REALLOC (resp->headers, size, count + 1, const char *);
613 resp->headers[count] = NULL;
618 /* Locate the header named NAME in the request data, starting with
619 position START. This allows the code to loop through the request
620 data, filtering for all requests of a given name. Returns the
621 found position, or -1 for failure. The code that uses this
622 function typically looks like this:
624 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
625 ... do something with header ...
627 If you only care about one header, use resp_header_get instead of
631 resp_header_locate (const struct response *resp, const char *name, int start,
632 const char **begptr, const char **endptr)
635 const char **headers = resp->headers;
638 if (!headers || !headers[1])
641 name_len = strlen (name);
647 for (; headers[i + 1]; i++)
649 const char *b = headers[i];
650 const char *e = headers[i + 1];
652 && b[name_len] == ':'
653 && 0 == strncasecmp (b, name, name_len))
656 while (b < e && ISSPACE (*b))
658 while (b < e && ISSPACE (e[-1]))
668 /* Find and retrieve the header named NAME in the request data. If
669 found, set *BEGPTR to its starting, and *ENDPTR to its ending
670 position, and return true. Otherwise return false.
672 This function is used as a building block for resp_header_copy
673 and resp_header_strdup. */
676 resp_header_get (const struct response *resp, const char *name,
677 const char **begptr, const char **endptr)
679 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
683 /* Copy the response header named NAME to buffer BUF, no longer than
684 BUFSIZE (BUFSIZE includes the terminating 0). If the header
685 exists, true is returned, false otherwise. If there should be no
686 limit on the size of the header, use resp_header_strdup instead.
688 If BUFSIZE is 0, no data is copied, but the boolean indication of
689 whether the header is present is still returned. */
692 resp_header_copy (const struct response *resp, const char *name,
693 char *buf, int bufsize)
696 if (!resp_header_get (resp, name, &b, &e))
700 int len = MIN (e - b, bufsize - 1);
701 memcpy (buf, b, len);
707 /* Return the value of header named NAME in RESP, allocated with
708 malloc. If such a header does not exist in RESP, return NULL. */
711 resp_header_strdup (const struct response *resp, const char *name)
714 if (!resp_header_get (resp, name, &b, &e))
716 return strdupdelim (b, e);
719 /* Parse the HTTP status line, which is of format:
721 HTTP-Version SP Status-Code SP Reason-Phrase
723 The function returns the status-code, or -1 if the status line
724 appears malformed. The pointer to "reason-phrase" message is
725 returned in *MESSAGE. */
728 resp_status (const struct response *resp, char **message)
735 /* For a HTTP/0.9 response, assume status 200. */
737 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
741 p = resp->headers[0];
742 end = resp->headers[1];
748 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
752 /* Match the HTTP version. This is optional because Gnutella
753 servers have been reported to not specify HTTP version. */
754 if (p < end && *p == '/')
757 while (p < end && ISDIGIT (*p))
759 if (p < end && *p == '.')
761 while (p < end && ISDIGIT (*p))
765 while (p < end && ISSPACE (*p))
767 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
770 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
775 while (p < end && ISSPACE (*p))
777 while (p < end && ISSPACE (end[-1]))
779 *message = strdupdelim (p, end);
785 /* Release the resources used by RESP. */
788 resp_free (struct response *resp)
790 xfree_null (resp->headers);
794 /* Print a single line of response, the characters [b, e). We tried
796 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
797 but that failed to escape the non-printable characters and, in fact,
798 caused crashes in UTF-8 locales. */
801 print_response_line(const char *prefix, const char *b, const char *e)
804 BOUNDED_TO_ALLOCA(b, e, copy);
805 logprintf (LOG_VERBOSE, "%s%s\n", prefix, escnonprint(copy));
808 /* Print the server response, line by line, omitting the trailing CRLF
809 from individual header lines, and prefixed with PREFIX. */
812 print_server_response (const struct response *resp, const char *prefix)
817 for (i = 0; resp->headers[i + 1]; i++)
819 const char *b = resp->headers[i];
820 const char *e = resp->headers[i + 1];
822 if (b < e && e[-1] == '\n')
824 if (b < e && e[-1] == '\r')
826 print_response_line(prefix, b, e);
830 /* Parse the `Content-Range' header and extract the information it
831 contains. Returns true if successful, false otherwise. */
833 parse_content_range (const char *hdr, wgint *first_byte_ptr,
834 wgint *last_byte_ptr, wgint *entity_length_ptr)
838 /* Ancient versions of Netscape proxy server, presumably predating
839 rfc2068, sent out `Content-Range' without the "bytes"
841 if (0 == strncasecmp (hdr, "bytes", 5))
844 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
848 while (ISSPACE (*hdr))
855 for (num = 0; ISDIGIT (*hdr); hdr++)
856 num = 10 * num + (*hdr - '0');
857 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
859 *first_byte_ptr = num;
861 for (num = 0; ISDIGIT (*hdr); hdr++)
862 num = 10 * num + (*hdr - '0');
863 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
865 *last_byte_ptr = num;
867 for (num = 0; ISDIGIT (*hdr); hdr++)
868 num = 10 * num + (*hdr - '0');
869 *entity_length_ptr = num;
873 /* Read the body of the request, but don't store it anywhere and don't
874 display a progress gauge. This is useful for reading the bodies of
875 administrative responses to which we will soon issue another
876 request. The response is not useful to the user, but reading it
877 allows us to continue using the same connection to the server.
879 If reading fails, false is returned, true otherwise. In debug
880 mode, the body is displayed for debugging purposes. */
883 skip_short_body (int fd, wgint contlen)
886 SKIP_SIZE = 512, /* size of the download buffer */
887 SKIP_THRESHOLD = 4096 /* the largest size we read */
889 char dlbuf[SKIP_SIZE + 1];
890 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
892 /* We shouldn't get here with unknown contlen. (This will change
893 with HTTP/1.1, which supports "chunked" transfer.) */
894 assert (contlen != -1);
896 /* If the body is too large, it makes more sense to simply close the
897 connection than to try to read the body. */
898 if (contlen > SKIP_THRESHOLD)
901 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
905 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
908 /* Don't normally report the error since this is an
909 optimization that should be invisible to the user. */
910 DEBUGP (("] aborting (%s).\n",
911 ret < 0 ? fd_errstr (fd) : "EOF received"));
915 /* Safe even if %.*s bogusly expects terminating \0 because
916 we've zero-terminated dlbuf above. */
917 DEBUGP (("%.*s", ret, dlbuf));
920 DEBUGP (("] done.\n"));
924 /* Extract a parameter from the string (typically an HTTP header) at
925 **SOURCE and advance SOURCE to the next parameter. Return false
926 when there are no more parameters to extract. The name of the
927 parameter is returned in NAME, and the value in VALUE. If the
928 parameter has no value, the token's value is zeroed out.
930 For example, if *SOURCE points to the string "attachment;
931 filename=\"foo bar\"", the first call to this function will return
932 the token named "attachment" and no value, and the second call will
933 return the token named "filename" and value "foo bar". The third
934 call will return false, indicating no more valid tokens. */
937 extract_param (const char **source, param_token *name, param_token *value,
940 const char *p = *source;
942 while (ISSPACE (*p)) ++p;
946 return false; /* no error; nothing more to extract */
951 while (*p && !ISSPACE (*p) && *p != '=' && *p != separator) ++p;
953 if (name->b == name->e)
954 return false; /* empty name: error */
955 while (ISSPACE (*p)) ++p;
956 if (*p == separator || !*p) /* no value */
959 if (*p == separator) ++p;
964 return false; /* error */
966 /* *p is '=', extract value */
968 while (ISSPACE (*p)) ++p;
969 if (*p == '"') /* quoted */
972 while (*p && *p != '"') ++p;
976 /* Currently at closing quote; find the end of param. */
977 while (ISSPACE (*p)) ++p;
978 while (*p && *p != separator) ++p;
982 /* garbage after closed quote, e.g. foo="bar"baz */
988 while (*p && *p != separator) ++p;
990 while (value->e != value->b && ISSPACE (value->e[-1]))
992 if (*p == separator) ++p;
999 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1001 /* Parse the contents of the `Content-Disposition' header, extracting
1002 the information useful to Wget. Content-Disposition is a header
1003 borrowed from MIME; when used in HTTP, it typically serves for
1004 specifying the desired file name of the resource. For example:
1006 Content-Disposition: attachment; filename="flora.jpg"
1008 Wget will skip the tokens it doesn't care about, such as
1009 "attachment" in the previous example; it will also skip other
1010 unrecognized params. If the header is syntactically correct and
1011 contains a file name, a copy of the file name is stored in
1012 *filename and true is returned. Otherwise, the function returns
1015 The file name is stripped of directory components and must not be
1019 parse_content_disposition (const char *hdr, char **filename)
1021 param_token name, value;
1022 while (extract_param (&hdr, &name, &value, ';'))
1023 if (BOUNDED_EQUAL_NO_CASE (name.b, name.e, "filename") && value.b != NULL)
1025 /* Make the file name begin at the last slash or backslash. */
1026 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1027 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1028 if (last_slash && last_bs)
1029 value.b = 1 + MAX (last_slash, last_bs);
1030 else if (last_slash || last_bs)
1031 value.b = 1 + (last_slash ? last_slash : last_bs);
1032 if (value.b == value.e)
1034 /* Start with the directory prefix, if specified. */
1037 int prefix_length = strlen (opt.dir_prefix);
1038 bool add_slash = (opt.dir_prefix[prefix_length - 1] != '/');
1043 total_length = prefix_length + (value.e - value.b);
1044 *filename = xmalloc (total_length + 1);
1045 strcpy (*filename, opt.dir_prefix);
1047 (*filename)[prefix_length - 1] = '/';
1048 memcpy (*filename + prefix_length, value.b, (value.e - value.b));
1049 (*filename)[total_length] = '\0';
1052 *filename = strdupdelim (value.b, value.e);
1058 /* Persistent connections. Currently, we cache the most recently used
1059 connection as persistent, provided that the HTTP server agrees to
1060 make it such. The persistence data is stored in the variables
1061 below. Ideally, it should be possible to cache an arbitrary fixed
1062 number of these connections. */
1064 /* Whether a persistent connection is active. */
1065 static bool pconn_active;
1068 /* The socket of the connection. */
1071 /* Host and port of the currently active persistent connection. */
1075 /* Whether a ssl handshake has occoured on this connection. */
1078 /* Whether the connection was authorized. This is only done by
1079 NTLM, which authorizes *connections* rather than individual
1080 requests. (That practice is peculiar for HTTP, but it is a
1081 useful optimization.) */
1085 /* NTLM data of the current connection. */
1086 struct ntlmdata ntlm;
1090 /* Mark the persistent connection as invalid and free the resources it
1091 uses. This is used by the CLOSE_* macros after they forcefully
1092 close a registered persistent connection. */
1095 invalidate_persistent (void)
1097 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1098 pconn_active = false;
1099 fd_close (pconn.socket);
1104 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1105 persistent. This will enable someone to use the same connection
1106 later. In the context of HTTP, this must be called only AFTER the
1107 response has been received and the server has promised that the
1108 connection will remain alive.
1110 If a previous connection was persistent, it is closed. */
1113 register_persistent (const char *host, int port, int fd, bool ssl)
1117 if (pconn.socket == fd)
1119 /* The connection FD is already registered. */
1124 /* The old persistent connection is still active; close it
1125 first. This situation arises whenever a persistent
1126 connection exists, but we then connect to a different
1127 host, and try to register a persistent connection to that
1129 invalidate_persistent ();
1133 pconn_active = true;
1135 pconn.host = xstrdup (host);
1138 pconn.authorized = false;
1140 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1143 /* Return true if a persistent connection is available for connecting
1147 persistent_available_p (const char *host, int port, bool ssl,
1148 bool *host_lookup_failed)
1150 /* First, check whether a persistent connection is active at all. */
1154 /* If we want SSL and the last connection wasn't or vice versa,
1155 don't use it. Checking for host and port is not enough because
1156 HTTP and HTTPS can apparently coexist on the same port. */
1157 if (ssl != pconn.ssl)
1160 /* If we're not connecting to the same port, we're not interested. */
1161 if (port != pconn.port)
1164 /* If the host is the same, we're in business. If not, there is
1165 still hope -- read below. */
1166 if (0 != strcasecmp (host, pconn.host))
1168 /* Check if pconn.socket is talking to HOST under another name.
1169 This happens often when both sites are virtual hosts
1170 distinguished only by name and served by the same network
1171 interface, and hence the same web server (possibly set up by
1172 the ISP and serving many different web sites). This
1173 admittedly unconventional optimization does not contradict
1174 HTTP and works well with popular server software. */
1178 struct address_list *al;
1181 /* Don't try to talk to two different SSL sites over the same
1182 secure connection! (Besides, it's not clear that
1183 name-based virtual hosting is even possible with SSL.) */
1186 /* If pconn.socket's peer is one of the IP addresses HOST
1187 resolves to, pconn.socket is for all intents and purposes
1188 already talking to HOST. */
1190 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1192 /* Can't get the peer's address -- something must be very
1193 wrong with the connection. */
1194 invalidate_persistent ();
1197 al = lookup_host (host, 0);
1200 *host_lookup_failed = true;
1204 found = address_list_contains (al, &ip);
1205 address_list_release (al);
1210 /* The persistent connection's peer address was found among the
1211 addresses HOST resolved to; therefore, pconn.sock is in fact
1212 already talking to HOST -- no need to reconnect. */
1215 /* Finally, check whether the connection is still open. This is
1216 important because most servers implement liberal (short) timeout
1217 on persistent connections. Wget can of course always reconnect
1218 if the connection doesn't work out, but it's nicer to know in
1219 advance. This test is a logical followup of the first test, but
1220 is "expensive" and therefore placed at the end of the list.
1222 (Current implementation of test_socket_open has a nice side
1223 effect that it treats sockets with pending data as "closed".
1224 This is exactly what we want: if a broken server sends message
1225 body in response to HEAD, or if it sends more than conent-length
1226 data, we won't reuse the corrupted connection.) */
1228 if (!test_socket_open (pconn.socket))
1230 /* Oops, the socket is no longer open. Now that we know that,
1231 let's invalidate the persistent connection before returning
1233 invalidate_persistent ();
1240 /* The idea behind these two CLOSE macros is to distinguish between
1241 two cases: one when the job we've been doing is finished, and we
1242 want to close the connection and leave, and two when something is
1243 seriously wrong and we're closing the connection as part of
1246 In case of keep_alive, CLOSE_FINISH should leave the connection
1247 open, while CLOSE_INVALIDATE should still close it.
1249 Note that the semantics of the flag `keep_alive' is "this
1250 connection *will* be reused (the server has promised not to close
1251 the connection once we're done)", while the semantics of
1252 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1253 active, registered connection". */
1255 #define CLOSE_FINISH(fd) do { \
1258 if (pconn_active && (fd) == pconn.socket) \
1259 invalidate_persistent (); \
1268 #define CLOSE_INVALIDATE(fd) do { \
1269 if (pconn_active && (fd) == pconn.socket) \
1270 invalidate_persistent (); \
1278 wgint len; /* received length */
1279 wgint contlen; /* expected length */
1280 wgint restval; /* the restart value */
1281 int res; /* the result of last read */
1282 char *rderrmsg; /* error message from read error */
1283 char *newloc; /* new location (redirection) */
1284 char *remote_time; /* remote time-stamp string */
1285 char *error; /* textual HTTP error */
1286 int statcode; /* status code */
1287 wgint rd_size; /* amount of data read from socket */
1288 double dltime; /* time it took to download the data */
1289 const char *referer; /* value of the referer header. */
1290 char *local_file; /* local file name. */
1291 bool timestamp_checked; /* true if pre-download time-stamping checks
1292 * have already been performed */
1293 char *orig_file_name; /* name of file to compare for time-stamping
1294 * (might be != local_file if -K is set) */
1295 wgint orig_file_size; /* size of file to compare for time-stamping */
1296 time_t orig_file_tstamp; /* time-stamp of file to compare for
1301 free_hstat (struct http_stat *hs)
1303 xfree_null (hs->newloc);
1304 xfree_null (hs->remote_time);
1305 xfree_null (hs->error);
1306 xfree_null (hs->rderrmsg);
1307 xfree_null (hs->local_file);
1308 xfree_null (hs->orig_file_name);
1310 /* Guard against being called twice. */
1312 hs->remote_time = NULL;
1316 #define BEGINS_WITH(line, string_constant) \
1317 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1318 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1319 || !line[sizeof (string_constant) - 1]))
1321 #define SET_USER_AGENT(req) do { \
1322 if (!opt.useragent) \
1323 request_set_header (req, "User-Agent", \
1324 aprintf ("Wget/%s", version_string), rel_value); \
1325 else if (*opt.useragent) \
1326 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1329 /* The flags that allow clobbering the file (opening with "wb").
1330 Defined here to avoid repetition later. #### This will require
1332 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1333 || opt.dirstruct || opt.output_document)
1335 /* Retrieve a document through HTTP protocol. It recognizes status
1336 code, and correctly handles redirections. It closes the network
1337 socket. If it receives an error from the functions below it, it
1338 will print it if there is enough information to do so (almost
1339 always), returning the error to the caller (i.e. http_loop).
1341 Various HTTP parameters are stored to hs.
1343 If PROXY is non-NULL, the connection will be made to the proxy
1344 server, and u->url will be requested. */
1346 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1348 struct request *req;
1351 char *user, *passwd;
1355 wgint contlen, contrange;
1362 /* Set to 1 when the authorization has already been sent and should
1363 not be tried again. */
1364 bool auth_finished = false;
1366 /* Set to 1 when just globally-set Basic authorization has been sent;
1367 * should prevent further Basic negotiations, but not other
1369 bool basic_auth_finished = false;
1371 /* Whether NTLM authentication is used for this request. */
1372 bool ntlm_seen = false;
1374 /* Whether our connection to the remote host is through SSL. */
1375 bool using_ssl = false;
1377 /* Whether a HEAD request will be issued (as opposed to GET or
1379 bool head_only = !!(*dt & HEAD_ONLY);
1382 struct response *resp;
1386 /* Whether this connection will be kept alive after the HTTP request
1390 /* Whether keep-alive should be inhibited.
1392 RFC 2068 requests that 1.0 clients not send keep-alive requests
1393 to proxies. This is because many 1.0 proxies do not interpret
1394 the Connection header and transfer it to the remote server,
1395 causing it to not close the connection and leave both the proxy
1396 and the client hanging. */
1397 bool inhibit_keep_alive =
1398 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1400 /* Headers sent when using POST. */
1401 wgint post_data_size = 0;
1403 bool host_lookup_failed = false;
1406 if (u->scheme == SCHEME_HTTPS)
1408 /* Initialize the SSL context. After this has once been done,
1409 it becomes a no-op. */
1412 scheme_disable (SCHEME_HTTPS);
1413 logprintf (LOG_NOTQUIET,
1414 _("Disabling SSL due to encountered errors.\n"));
1415 return SSLINITFAILED;
1418 #endif /* HAVE_SSL */
1420 /* Initialize certain elements of struct http_stat. */
1424 hs->rderrmsg = NULL;
1426 hs->remote_time = NULL;
1431 /* Prepare the request to send. */
1433 req = request_new ();
1436 const char *meth = "GET";
1439 else if (opt.post_file_name || opt.post_data)
1441 /* Use the full path, i.e. one that includes the leading slash and
1442 the query string. E.g. if u->path is "foo/bar" and u->query is
1443 "param=value", full_path will be "/foo/bar?param=value". */
1446 /* When using SSL over proxy, CONNECT establishes a direct
1447 connection to the HTTPS server. Therefore use the same
1448 argument as when talking to the server directly. */
1449 && u->scheme != SCHEME_HTTPS
1452 meth_arg = xstrdup (u->url);
1454 meth_arg = url_full_path (u);
1455 request_set_method (req, meth, meth_arg);
1458 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1459 if (*dt & SEND_NOCACHE)
1460 request_set_header (req, "Pragma", "no-cache", rel_none);
1462 request_set_header (req, "Range",
1463 aprintf ("bytes=%s-",
1464 number_to_static_string (hs->restval)),
1466 SET_USER_AGENT (req);
1467 request_set_header (req, "Accept", "*/*", rel_none);
1469 /* Find the username and password for authentication. */
1472 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1473 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1474 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1477 && !u->user) /* We only do "site-wide" authentication with "global"
1478 user/password values; URL user/password info overrides. */
1480 /* If this is a host for which we've already received a Basic
1481 * challenge, we'll go ahead and send Basic authentication creds. */
1482 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1488 char *proxy_user, *proxy_passwd;
1489 /* For normal username and password, URL components override
1490 command-line/wgetrc parameters. With proxy
1491 authentication, it's the reverse, because proxy URLs are
1492 normally the "permanent" ones, so command-line args
1493 should take precedence. */
1494 if (opt.proxy_user && opt.proxy_passwd)
1496 proxy_user = opt.proxy_user;
1497 proxy_passwd = opt.proxy_passwd;
1501 proxy_user = proxy->user;
1502 proxy_passwd = proxy->passwd;
1504 /* #### This does not appear right. Can't the proxy request,
1505 say, `Digest' authentication? */
1506 if (proxy_user && proxy_passwd)
1507 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1509 /* If we're using a proxy, we will be connecting to the proxy
1513 /* Proxy authorization over SSL is handled below. */
1515 if (u->scheme != SCHEME_HTTPS)
1517 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1520 /* Generate the Host header, HOST:PORT. Take into account that:
1522 - Broken server-side software often doesn't recognize the PORT
1523 argument, so we must generate "Host: www.server.com" instead of
1524 "Host: www.server.com:80" (and likewise for https port).
1526 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1527 becomes ambiguous and needs to be rewritten as "Host:
1528 [3ffe:8100:200:2::2]:1234". */
1530 /* Formats arranged for hfmt[add_port][add_squares]. */
1531 static const char *hfmt[][2] = {
1532 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1534 int add_port = u->port != scheme_default_port (u->scheme);
1535 int add_squares = strchr (u->host, ':') != NULL;
1536 request_set_header (req, "Host",
1537 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1541 if (!inhibit_keep_alive)
1542 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1545 request_set_header (req, "Cookie",
1546 cookie_header (wget_cookie_jar,
1547 u->host, u->port, u->path,
1549 u->scheme == SCHEME_HTTPS
1556 if (opt.post_data || opt.post_file_name)
1558 request_set_header (req, "Content-Type",
1559 "application/x-www-form-urlencoded", rel_none);
1561 post_data_size = strlen (opt.post_data);
1564 post_data_size = file_size (opt.post_file_name);
1565 if (post_data_size == -1)
1567 logprintf (LOG_NOTQUIET, _("POST data file `%s' missing: %s\n"),
1568 opt.post_file_name, strerror (errno));
1572 request_set_header (req, "Content-Length",
1573 xstrdup (number_to_static_string (post_data_size)),
1577 /* Add the user headers. */
1578 if (opt.user_headers)
1581 for (i = 0; opt.user_headers[i]; i++)
1582 request_set_user_header (req, opt.user_headers[i]);
1586 /* We need to come back here when the initial attempt to retrieve
1587 without authorization header fails. (Expected to happen at least
1588 for the Digest authorization scheme.) */
1592 /* Establish the connection. */
1594 if (!inhibit_keep_alive)
1596 /* Look for a persistent connection to target host, unless a
1597 proxy is used. The exception is when SSL is in use, in which
1598 case the proxy is nothing but a passthrough to the target
1599 host, registered as a connection to the latter. */
1600 struct url *relevant = conn;
1602 if (u->scheme == SCHEME_HTTPS)
1606 if (persistent_available_p (relevant->host, relevant->port,
1608 relevant->scheme == SCHEME_HTTPS,
1612 &host_lookup_failed))
1614 sock = pconn.socket;
1615 using_ssl = pconn.ssl;
1616 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1617 escnonprint (pconn.host), pconn.port);
1618 DEBUGP (("Reusing fd %d.\n", sock));
1619 if (pconn.authorized)
1620 /* If the connection is already authorized, the "Basic"
1621 authorization added by code above is unnecessary and
1623 request_remove_header (req, "Authorization");
1629 /* In its current implementation, persistent_available_p will
1630 look up conn->host in some cases. If that lookup failed, we
1631 don't need to bother with connect_to_host. */
1632 if (host_lookup_failed)
1638 sock = connect_to_host (conn->host, conn->port);
1647 return (retryable_socket_connect_error (errno)
1648 ? CONERROR : CONIMPOSSIBLE);
1652 if (proxy && u->scheme == SCHEME_HTTPS)
1654 /* When requesting SSL URLs through proxies, use the
1655 CONNECT method to request passthrough. */
1656 struct request *connreq = request_new ();
1657 request_set_method (connreq, "CONNECT",
1658 aprintf ("%s:%d", u->host, u->port));
1659 SET_USER_AGENT (connreq);
1662 request_set_header (connreq, "Proxy-Authorization",
1663 proxyauth, rel_value);
1664 /* Now that PROXYAUTH is part of the CONNECT request,
1665 zero it out so we don't send proxy authorization with
1666 the regular request below. */
1669 /* Examples in rfc2817 use the Host header in CONNECT
1670 requests. I don't see how that gains anything, given
1671 that the contents of Host would be exactly the same as
1672 the contents of CONNECT. */
1674 write_error = request_send (connreq, sock);
1675 request_free (connreq);
1676 if (write_error < 0)
1678 CLOSE_INVALIDATE (sock);
1682 head = read_http_response_head (sock);
1685 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1687 CLOSE_INVALIDATE (sock);
1696 DEBUGP (("proxy responded with: [%s]\n", head));
1698 resp = resp_new (head);
1699 statcode = resp_status (resp, &message);
1702 if (statcode != 200)
1705 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1706 message ? escnonprint (message) : "?");
1707 xfree_null (message);
1710 xfree_null (message);
1712 /* SOCK is now *really* connected to u->host, so update CONN
1713 to reflect this. That way register_persistent will
1714 register SOCK as being connected to u->host:u->port. */
1718 if (conn->scheme == SCHEME_HTTPS)
1720 if (!ssl_connect (sock) || !ssl_check_certificate (sock, u->host))
1727 #endif /* HAVE_SSL */
1730 /* Send the request to server. */
1731 write_error = request_send (req, sock);
1733 if (write_error >= 0)
1737 DEBUGP (("[POST data: %s]\n", opt.post_data));
1738 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1740 else if (opt.post_file_name && post_data_size != 0)
1741 write_error = post_file (sock, opt.post_file_name, post_data_size);
1744 if (write_error < 0)
1746 CLOSE_INVALIDATE (sock);
1750 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1751 proxy ? "Proxy" : "HTTP");
1756 head = read_http_response_head (sock);
1761 logputs (LOG_NOTQUIET, _("No data received.\n"));
1762 CLOSE_INVALIDATE (sock);
1768 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1770 CLOSE_INVALIDATE (sock);
1775 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1777 resp = resp_new (head);
1779 /* Check for status line. */
1781 statcode = resp_status (resp, &message);
1782 if (!opt.server_response)
1783 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1784 message ? escnonprint (message) : "");
1787 logprintf (LOG_VERBOSE, "\n");
1788 print_server_response (resp, " ");
1791 /* Determine the local filename if needed. Notice that if -O is used
1792 * hstat.local_file is set by http_loop to the argument of -O. */
1793 if (!hs->local_file)
1795 /* Honor Content-Disposition whether possible. */
1796 if (!opt.content_disposition
1797 || !resp_header_copy (resp, "Content-Disposition",
1798 hdrval, sizeof (hdrval))
1799 || !parse_content_disposition (hdrval, &hs->local_file))
1801 /* The Content-Disposition header is missing or broken.
1802 * Choose unique file name according to given URL. */
1803 hs->local_file = url_file_name (u);
1807 /* TODO: perform this check only once. */
1808 if (file_exists_p (hs->local_file))
1812 /* If opt.noclobber is turned on and file already exists, do not
1813 retrieve the file */
1814 logprintf (LOG_VERBOSE, _("\
1815 File `%s' already there; not retrieving.\n\n"), hs->local_file);
1816 /* If the file is there, we suppose it's retrieved OK. */
1819 /* #### Bogusness alert. */
1820 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1821 if (has_html_suffix_p (hs->local_file))
1826 else if (!ALLOW_CLOBBER)
1828 char *unique = unique_name (hs->local_file, true);
1829 if (unique != hs->local_file)
1830 xfree (hs->local_file);
1831 hs->local_file = unique;
1835 /* Support timestamping */
1836 /* TODO: move this code out of gethttp. */
1837 if (opt.timestamping && !hs->timestamp_checked)
1839 size_t filename_len = strlen (hs->local_file);
1840 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1841 bool local_dot_orig_file_exists = false;
1842 char *local_filename = NULL;
1845 if (opt.backup_converted)
1846 /* If -K is specified, we'll act on the assumption that it was specified
1847 last time these files were downloaded as well, and instead of just
1848 comparing local file X against server file X, we'll compare local
1849 file X.orig (if extant, else X) against server file X. If -K
1850 _wasn't_ specified last time, or the server contains files called
1851 *.orig, -N will be back to not operating correctly with -k. */
1853 /* Would a single s[n]printf() call be faster? --dan
1855 Definitely not. sprintf() is horribly slow. It's a
1856 different question whether the difference between the two
1857 affects a program. Usually I'd say "no", but at one
1858 point I profiled Wget, and found that a measurable and
1859 non-negligible amount of time was lost calling sprintf()
1860 in url.c. Replacing sprintf with inline calls to
1861 strcpy() and number_to_string() made a difference.
1863 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
1864 memcpy (filename_plus_orig_suffix + filename_len,
1865 ".orig", sizeof (".orig"));
1867 /* Try to stat() the .orig file. */
1868 if (stat (filename_plus_orig_suffix, &st) == 0)
1870 local_dot_orig_file_exists = true;
1871 local_filename = filename_plus_orig_suffix;
1875 if (!local_dot_orig_file_exists)
1876 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1877 if (stat (hs->local_file, &st) == 0)
1878 local_filename = hs->local_file;
1880 if (local_filename != NULL)
1881 /* There was a local file, so we'll check later to see if the version
1882 the server has is the same version we already have, allowing us to
1885 hs->orig_file_name = xstrdup (local_filename);
1886 hs->orig_file_size = st.st_size;
1887 hs->orig_file_tstamp = st.st_mtime;
1889 /* Modification time granularity is 2 seconds for Windows, so
1890 increase local time by 1 second for later comparison. */
1891 ++hs->orig_file_tstamp;
1896 if (!opt.ignore_length
1897 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1901 parsed = str_to_wgint (hdrval, NULL, 10);
1902 if (parsed == WGINT_MAX && errno == ERANGE)
1905 #### If Content-Length is out of range, it most likely
1906 means that the file is larger than 2G and that we're
1907 compiled without LFS. In that case we should probably
1908 refuse to even attempt to download the file. */
1911 else if (parsed < 0)
1913 /* Negative Content-Length; nonsensical, so we can't
1914 assume any information about the content to receive. */
1921 /* Check for keep-alive related responses. */
1922 if (!inhibit_keep_alive && contlen != -1)
1924 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1926 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1928 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1933 /* The server has promised that it will not close the connection
1934 when we're done. This means that we can register it. */
1935 register_persistent (conn->host, conn->port, sock, using_ssl);
1937 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1939 /* Authorization is required. */
1940 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1941 CLOSE_FINISH (sock);
1943 CLOSE_INVALIDATE (sock);
1944 pconn.authorized = false;
1945 if (!auth_finished && (user && passwd))
1947 /* IIS sends multiple copies of WWW-Authenticate, one with
1948 the value "negotiate", and other(s) with data. Loop over
1949 all the occurrences and pick the one we recognize. */
1951 const char *wabeg, *waend;
1952 char *www_authenticate = NULL;
1954 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1955 &wabeg, &waend)) != -1;
1957 if (known_authentication_scheme_p (wabeg, waend))
1959 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
1963 if (!www_authenticate)
1965 /* If the authentication header is missing or
1966 unrecognized, there's no sense in retrying. */
1967 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1969 else if (!basic_auth_finished
1970 || !BEGINS_WITH (www_authenticate, "Basic"))
1973 pth = url_full_path (u);
1974 request_set_header (req, "Authorization",
1975 create_authorization_line (www_authenticate,
1977 request_method (req),
1981 if (BEGINS_WITH (www_authenticate, "NTLM"))
1983 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
1985 /* Need to register this host as using basic auth,
1986 * so we automatically send creds next time. */
1987 register_basic_auth_host (u->host);
1990 goto retry_with_auth;
1994 /* We already did Basic auth, and it failed. Gotta
1998 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
2002 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2004 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2006 pconn.authorized = true;
2010 hs->statcode = statcode;
2012 hs->error = xstrdup (_("Malformed status line"));
2014 hs->error = xstrdup (_("(no description)"));
2016 hs->error = xstrdup (message);
2017 xfree_null (message);
2019 type = resp_header_strdup (resp, "Content-Type");
2022 char *tmp = strchr (type, ';');
2025 while (tmp > type && ISSPACE (tmp[-1]))
2030 hs->newloc = resp_header_strdup (resp, "Location");
2031 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2033 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2037 const char *scbeg, *scend;
2038 /* The jar should have been created by now. */
2039 assert (wget_cookie_jar != NULL);
2041 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2042 &scbeg, &scend)) != -1;
2045 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2046 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2047 u->path, set_cookie);
2051 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2053 wgint first_byte_pos, last_byte_pos, entity_length;
2054 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2056 contrange = first_byte_pos;
2060 /* 20x responses are counted among successful by default. */
2061 if (H_20X (statcode))
2064 /* Return if redirected. */
2065 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2067 /* RFC2068 says that in case of the 300 (multiple choices)
2068 response, the server can output a preferred URL through
2069 `Location' header; otherwise, the request should be treated
2070 like GET. So, if the location is set, it will be a
2071 redirection; otherwise, just proceed normally. */
2072 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2076 logprintf (LOG_VERBOSE,
2077 _("Location: %s%s\n"),
2078 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2079 hs->newloc ? _(" [following]") : "");
2080 if (keep_alive && !head_only && skip_short_body (sock, contlen))
2081 CLOSE_FINISH (sock);
2083 CLOSE_INVALIDATE (sock);
2089 /* If content-type is not given, assume text/html. This is because
2090 of the multitude of broken CGI's that "forget" to generate the
2093 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2094 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2099 if (opt.html_extension && (*dt & TEXTHTML))
2100 /* -E / --html-extension / html_extension = on was specified, and this is a
2101 text/html file. If some case-insensitive variation on ".htm[l]" isn't
2102 already the file's suffix, tack on ".html". */
2104 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
2106 if (last_period_in_local_filename == NULL
2107 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
2108 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
2110 int local_filename_len = strlen (hs->local_file);
2111 /* Resize the local file, allowing for ".html" preceded by
2112 optional ".NUMBER". */
2113 hs->local_file = xrealloc (hs->local_file,
2114 local_filename_len + 24 + sizeof (".html"));
2115 strcpy(hs->local_file + local_filename_len, ".html");
2116 /* If clobbering is not allowed and the file, as named,
2117 exists, tack on ".NUMBER.html" instead. */
2118 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
2122 sprintf (hs->local_file + local_filename_len,
2123 ".%d.html", ext_num++);
2124 while (file_exists_p (hs->local_file));
2126 *dt |= ADDED_HTML_EXTENSION;
2130 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
2132 /* If `-c' is in use and the file has been fully downloaded (or
2133 the remote file has shrunk), Wget effectively requests bytes
2134 after the end of file and the server response with 416. */
2135 logputs (LOG_VERBOSE, _("\
2136 \n The file is already fully retrieved; nothing to do.\n\n"));
2137 /* In case the caller inspects. */
2140 /* Mark as successfully retrieved. */
2143 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2144 might be more bytes in the body. */
2145 return RETRUNNEEDED;
2147 if ((contrange != 0 && contrange != hs->restval)
2148 || (H_PARTIAL (statcode) && !contrange))
2150 /* The Range request was somehow misunderstood by the server.
2153 CLOSE_INVALIDATE (sock);
2156 hs->contlen = contlen + contrange;
2162 /* No need to print this output if the body won't be
2163 downloaded at all, or if the original server response is
2165 logputs (LOG_VERBOSE, _("Length: "));
2168 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2169 if (contlen + contrange >= 1024)
2170 logprintf (LOG_VERBOSE, " (%s)",
2171 human_readable (contlen + contrange));
2174 if (contlen >= 1024)
2175 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2176 number_to_static_string (contlen),
2177 human_readable (contlen));
2179 logprintf (LOG_VERBOSE, _(", %s remaining"),
2180 number_to_static_string (contlen));
2184 logputs (LOG_VERBOSE,
2185 opt.ignore_length ? _("ignored") : _("unspecified"));
2187 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
2189 logputs (LOG_VERBOSE, "\n");
2193 type = NULL; /* We don't need it any more. */
2195 /* Return if we have no intention of further downloading. */
2196 if (!(*dt & RETROKF) || head_only)
2198 /* In case the caller cares to look... */
2203 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2204 servers not to send body in response to a HEAD request, and
2205 those that do will likely be caught by test_socket_open.
2206 If not, they can be worked around using
2207 `--no-http-keep-alive'. */
2208 CLOSE_FINISH (sock);
2209 else if (keep_alive && skip_short_body (sock, contlen))
2210 /* Successfully skipped the body; also keep using the socket. */
2211 CLOSE_FINISH (sock);
2213 CLOSE_INVALIDATE (sock);
2214 return RETRFINISHED;
2217 /* Open the local file. */
2220 mkalldirs (hs->local_file);
2222 rotate_backups (hs->local_file);
2224 fp = fopen (hs->local_file, "ab");
2225 else if (ALLOW_CLOBBER)
2226 fp = fopen (hs->local_file, "wb");
2229 fp = fopen_excl (hs->local_file, true);
2230 if (!fp && errno == EEXIST)
2232 /* We cannot just invent a new name and use it (which is
2233 what functions like unique_create typically do)
2234 because we told the user we'd use this name.
2235 Instead, return and retry the download. */
2236 logprintf (LOG_NOTQUIET,
2237 _("%s has sprung into existence.\n"),
2239 CLOSE_INVALIDATE (sock);
2240 return FOPEN_EXCL_ERR;
2245 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2246 CLOSE_INVALIDATE (sock);
2253 /* Print fetch message, if opt.verbose. */
2256 logprintf (LOG_NOTQUIET, _("Saving to: `%s'\n"),
2257 HYPHENP (hs->local_file) ? "STDOUT" : hs->local_file);
2260 /* This confuses the timestamping code that checks for file size.
2261 #### The timestamping code should be smarter about file size. */
2262 if (opt.save_headers && hs->restval == 0)
2263 fwrite (head, 1, strlen (head), fp);
2265 /* Now we no longer need to store the response header. */
2268 /* Download the request body. */
2271 /* If content-length is present, read that much; otherwise, read
2272 until EOF. The HTTP spec doesn't require the server to
2273 actually close the connection when it's done sending data. */
2274 flags |= rb_read_exactly;
2275 if (hs->restval > 0 && contrange == 0)
2276 /* If the server ignored our range request, instruct fd_read_body
2277 to skip the first RESTVAL bytes of body. */
2278 flags |= rb_skip_startpos;
2279 hs->len = hs->restval;
2281 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2282 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2286 CLOSE_FINISH (sock);
2290 hs->rderrmsg = xstrdup (fd_errstr (sock));
2291 CLOSE_INVALIDATE (sock);
2298 return RETRFINISHED;
2301 /* The genuine HTTP loop! This is the part where the retrieval is
2302 retried, and retried, and retried, and... */
2304 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
2305 int *dt, struct url *proxy)
2308 bool got_head = false; /* used for time-stamping and filename detection */
2309 bool time_came_from_head = false;
2310 bool got_name = false;
2313 uerr_t err, ret = TRYLIMEXC;
2314 time_t tmr = -1; /* remote time-stamp */
2315 struct http_stat hstat; /* HTTP status */
2317 bool send_head_first = true;
2319 /* Assert that no value for *LOCAL_FILE was passed. */
2320 assert (local_file == NULL || *local_file == NULL);
2322 /* Set LOCAL_FILE parameter. */
2323 if (local_file && opt.output_document)
2324 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2326 /* Reset NEWLOC parameter. */
2329 /* This used to be done in main(), but it's a better idea to do it
2330 here so that we don't go through the hoops if we're just using
2335 /* Warn on (likely bogus) wildcard usage in HTTP. */
2336 if (opt.ftp_glob && has_wildcards_p (u->path))
2337 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2339 /* Setup hstat struct. */
2341 hstat.referer = referer;
2343 if (opt.output_document)
2345 hstat.local_file = xstrdup (opt.output_document);
2349 /* Reset the counter. */
2352 /* Reset the document type. */
2355 /* Skip preliminary HEAD request if we're not in spider mode AND
2356 * if -O was given or HTTP Content-Disposition support is disabled. */
2358 && (got_name || !opt.content_disposition))
2359 send_head_first = false;
2361 /* Send preliminary HEAD request if -N is given and we have an existing
2362 * destination file. */
2363 if (opt.timestamping
2364 && !opt.content_disposition
2365 && file_exists_p (url_file_name (u)))
2366 send_head_first = true;
2371 /* Increment the pass counter. */
2373 sleep_between_retrievals (count);
2375 /* Get the current time string. */
2376 tms = time_str (time (NULL));
2378 if (opt.spider && !got_head)
2379 logprintf (LOG_VERBOSE, _("\
2380 Spider mode enabled. Check if remote file exists.\n"));
2382 /* Print fetch message, if opt.verbose. */
2385 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2390 sprintf (tmp, _("(try:%2d)"), count);
2391 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2396 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2401 ws_changetitle (hurl);
2406 /* Default document type is empty. However, if spider mode is
2407 on or time-stamping is employed, HEAD_ONLY commands is
2408 encoded within *dt. */
2409 if (send_head_first && !got_head)
2414 /* Decide whether or not to restart. */
2417 && stat (hstat.local_file, &st) == 0
2418 && S_ISREG (st.st_mode))
2419 /* When -c is used, continue from on-disk size. (Can't use
2420 hstat.len even if count>1 because we don't want a failed
2421 first attempt to clobber existing data.) */
2422 hstat.restval = st.st_size;
2424 /* otherwise, continue where the previous try left off */
2425 hstat.restval = hstat.len;
2429 /* Decide whether to send the no-cache directive. We send it in
2431 a) we're using a proxy, and we're past our first retrieval.
2432 Some proxies are notorious for caching incomplete data, so
2433 we require a fresh get.
2434 b) caching is explicitly inhibited. */
2435 if ((proxy && count > 1) /* a */
2436 || !opt.allow_cache) /* b */
2437 *dt |= SEND_NOCACHE;
2439 *dt &= ~SEND_NOCACHE;
2441 /* Try fetching the document, or at least its head. */
2442 err = gethttp (u, &hstat, dt, proxy);
2445 tms = time_str (time (NULL));
2447 /* Get the new location (with or without the redirection). */
2449 *newloc = xstrdup (hstat.newloc);
2453 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2454 case CONERROR: case READERR: case WRITEFAILED:
2455 case RANGEERR: case FOPEN_EXCL_ERR:
2456 /* Non-fatal errors continue executing the loop, which will
2457 bring them to "while" statement at the end, to judge
2458 whether the number of tries was exceeded. */
2459 printwhat (count, opt.ntry);
2461 case FWRITEERR: case FOPENERR:
2462 /* Another fatal error. */
2463 logputs (LOG_VERBOSE, "\n");
2464 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2465 hstat.local_file, strerror (errno));
2466 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2467 case SSLINITFAILED: case CONTNOTSUPPORTED:
2468 /* Fatal errors just return from the function. */
2472 /* Another fatal error. */
2473 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2477 /* Return the new location to the caller. */
2480 logprintf (LOG_NOTQUIET,
2481 _("ERROR: Redirection (%d) without location.\n"),
2491 /* The file was already fully retrieved. */
2495 /* Deal with you later. */
2498 /* All possibilities should have been exhausted. */
2502 if (!(*dt & RETROKF))
2507 /* #### Ugly ugly ugly! */
2508 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2509 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2512 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
2514 && (hstat.statcode == 500 || hstat.statcode == 501))
2519 /* Maybe we should always keep track of broken links, not just in
2521 else if (opt.spider)
2523 /* #### Again: ugly ugly ugly! */
2525 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2526 nonexisting_url (hurl);
2527 logprintf (LOG_NOTQUIET, _("\
2528 Remote file does not exist -- broken link!!!\n"));
2532 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2533 tms, hstat.statcode, escnonprint (hstat.error));
2535 logputs (LOG_VERBOSE, "\n");
2541 /* Did we get the time-stamp? */
2542 if (send_head_first && !got_head)
2544 bool restart_loop = false;
2546 if (opt.timestamping && !hstat.remote_time)
2548 logputs (LOG_NOTQUIET, _("\
2549 Last-modified header missing -- time-stamps turned off.\n"));
2551 else if (hstat.remote_time)
2553 /* Convert the date-string into struct tm. */
2554 tmr = http_atotm (hstat.remote_time);
2555 if (tmr == (time_t) (-1))
2556 logputs (LOG_VERBOSE, _("\
2557 Last-modified header invalid -- time-stamp ignored.\n"));
2558 if (*dt & HEAD_ONLY)
2559 time_came_from_head = true;
2562 /* The time-stamping section. */
2563 if (opt.timestamping)
2565 if (hstat.orig_file_name) /* Perform the following checks only
2566 if the file we're supposed to
2567 download already exists. */
2569 if (hstat.remote_time &&
2570 tmr != (time_t) (-1))
2572 /* Now time-stamping can be used validly. Time-stamping
2573 means that if the sizes of the local and remote file
2574 match, and local file is newer than the remote file,
2575 it will not be retrieved. Otherwise, the normal
2576 download procedure is resumed. */
2577 if (hstat.orig_file_tstamp >= tmr)
2579 if (hstat.contlen == -1
2580 || hstat.orig_file_size == hstat.contlen)
2582 logprintf (LOG_VERBOSE, _("\
2583 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2584 hstat.orig_file_name);
2590 logprintf (LOG_VERBOSE, _("\
2591 The sizes do not match (local %s) -- retrieving.\n"),
2592 number_to_static_string (hstat.orig_file_size));
2596 logputs (LOG_VERBOSE,
2597 _("Remote file is newer, retrieving.\n"));
2599 logputs (LOG_VERBOSE, "\n");
2603 /* free_hstat (&hstat); */
2604 hstat.timestamp_checked = true;
2605 restart_loop = true;
2614 logputs (LOG_VERBOSE, _("\
2615 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
2616 restart_loop = true;
2620 logprintf (LOG_VERBOSE, _("\
2621 Remote file exists but does not contain any link -- not retrieving.\n\n"));
2622 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2628 logprintf (LOG_VERBOSE, _("\
2629 Remote file exists but recursion is disabled -- not retrieving.\n\n"));
2630 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2635 if (send_head_first)
2638 restart_loop = true;
2641 got_head = true; /* no more time-stamping */
2643 count = 0; /* the retrieve count for HEAD is reset */
2649 if ((tmr != (time_t) (-1))
2650 && ((hstat.len == hstat.contlen) ||
2651 ((hstat.res == 0) && (hstat.contlen == -1))))
2653 /* #### This code repeats in http.c and ftp.c. Move it to a
2655 const char *fl = NULL;
2656 if (opt.output_document)
2658 if (output_stream_regular)
2659 fl = opt.output_document;
2662 fl = hstat.local_file;
2666 /* Reparse time header, in case it's changed. */
2667 if (time_came_from_head
2668 && hstat.remote_time && hstat.remote_time[0])
2670 newtmr = http_atotm (hstat.remote_time);
2677 /* End of time-stamping section. */
2679 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
2680 total_download_time += hstat.dltime;
2682 if (hstat.len == hstat.contlen)
2686 logprintf (LOG_VERBOSE,
2687 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2688 tms, tmrate, hstat.local_file,
2689 number_to_static_string (hstat.len),
2690 number_to_static_string (hstat.contlen));
2691 logprintf (LOG_NONVERBOSE,
2692 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2694 number_to_static_string (hstat.len),
2695 number_to_static_string (hstat.contlen),
2696 hstat.local_file, count);
2699 total_downloaded_bytes += hstat.len;
2701 /* Remember that we downloaded the file for later ".orig" code. */
2702 if (*dt & ADDED_HTML_EXTENSION)
2703 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2705 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2710 else if (hstat.res == 0) /* No read error */
2712 if (hstat.contlen == -1) /* We don't know how much we were supposed
2713 to get, so assume we succeeded. */
2717 logprintf (LOG_VERBOSE,
2718 _("%s (%s) - `%s' saved [%s]\n\n"),
2719 tms, tmrate, hstat.local_file,
2720 number_to_static_string (hstat.len));
2721 logprintf (LOG_NONVERBOSE,
2722 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2723 tms, u->url, number_to_static_string (hstat.len),
2724 hstat.local_file, count);
2727 total_downloaded_bytes += hstat.len;
2729 /* Remember that we downloaded the file for later ".orig" code. */
2730 if (*dt & ADDED_HTML_EXTENSION)
2731 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2733 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2738 else if (hstat.len < hstat.contlen) /* meaning we lost the
2739 connection too soon */
2741 logprintf (LOG_VERBOSE,
2742 _("%s (%s) - Connection closed at byte %s. "),
2743 tms, tmrate, number_to_static_string (hstat.len));
2744 printwhat (count, opt.ntry);
2748 /* Getting here would mean reading more data than
2749 requested with content-length, which we never do. */
2752 else /* from now on hstat.res can only be -1 */
2754 if (hstat.contlen == -1)
2756 logprintf (LOG_VERBOSE,
2757 _("%s (%s) - Read error at byte %s (%s)."),
2758 tms, tmrate, number_to_static_string (hstat.len),
2760 printwhat (count, opt.ntry);
2763 else /* hstat.res == -1 and contlen is given */
2765 logprintf (LOG_VERBOSE,
2766 _("%s (%s) - Read error at byte %s/%s (%s). "),
2768 number_to_static_string (hstat.len),
2769 number_to_static_string (hstat.contlen),
2771 printwhat (count, opt.ntry);
2777 while (!opt.ntry || (count < opt.ntry));
2781 *local_file = xstrdup (hstat.local_file);
2782 free_hstat (&hstat);
2787 /* Check whether the result of strptime() indicates success.
2788 strptime() returns the pointer to how far it got to in the string.
2789 The processing has been successful if the string is at `GMT' or
2790 `+X', or at the end of the string.
2792 In extended regexp parlance, the function returns 1 if P matches
2793 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2794 can return) is considered a failure and 0 is returned. */
2796 check_end (const char *p)
2800 while (ISSPACE (*p))
2803 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2804 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2810 /* Convert the textual specification of time in TIME_STRING to the
2811 number of seconds since the Epoch.
2813 TIME_STRING can be in any of the three formats RFC2616 allows the
2814 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
2815 as well as the time format used in the Set-Cookie header.
2816 Timezones are ignored, and should be GMT.
2818 Return the computed time_t representation, or -1 if the conversion
2821 This function uses strptime with various string formats for parsing
2822 TIME_STRING. This results in a parser that is not as lenient in
2823 interpreting TIME_STRING as I would like it to be. Being based on
2824 strptime, it always allows shortened months, one-digit days, etc.,
2825 but due to the multitude of formats in which time can be
2826 represented, an ideal HTTP time parser would be even more
2827 forgiving. It should completely ignore things like week days and
2828 concentrate only on the various forms of representing years,
2829 months, days, hours, minutes, and seconds. For example, it would
2830 be nice if it accepted ISO 8601 out of the box.
2832 I've investigated free and PD code for this purpose, but none was
2833 usable. getdate was big and unwieldy, and had potential copyright
2834 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2835 distributed with phttpd, is excellent, but we cannot use it because
2836 it is not assigned to the FSF. So I stuck it with strptime. */
2839 http_atotm (const char *time_string)
2841 /* NOTE: Solaris strptime man page claims that %n and %t match white
2842 space, but that's not universally available. Instead, we simply
2843 use ` ' to mean "skip all WS", which works under all strptime
2844 implementations I've tested. */
2846 static const char *time_formats[] = {
2847 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
2848 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
2849 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
2850 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
2851 (used in Set-Cookie, defined in the
2852 Netscape cookie specification.) */
2854 const char *oldlocale;
2856 time_t ret = (time_t) -1;
2858 /* Solaris strptime fails to recognize English month names in
2859 non-English locales, which we work around by temporarily setting
2860 locale to C before invoking strptime. */
2861 oldlocale = setlocale (LC_TIME, NULL);
2862 setlocale (LC_TIME, "C");
2864 for (i = 0; i < countof (time_formats); i++)
2868 /* Some versions of strptime use the existing contents of struct
2869 tm to recalculate the date according to format. Zero it out
2870 to prevent stack garbage from influencing strptime. */
2873 if (check_end (strptime (time_string, time_formats[i], &t)))
2880 /* Restore the previous locale. */
2881 setlocale (LC_TIME, oldlocale);
2886 /* Authorization support: We support three authorization schemes:
2888 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2890 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2891 consisting of answering to the server's challenge with the proper
2894 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2895 Stenberg for libcurl. Like digest, NTLM is based on a
2896 challenge-response mechanism, but unlike digest, it is non-standard
2897 (authenticates TCP connections rather than requests), undocumented
2898 and Microsoft-specific. */
2900 /* Create the authentication header contents for the `Basic' scheme.
2901 This is done by encoding the string "USER:PASS" to base64 and
2902 prepending the string "Basic " in front of it. */
2905 basic_authentication_encode (const char *user, const char *passwd)
2908 int len1 = strlen (user) + 1 + strlen (passwd);
2910 t1 = (char *)alloca (len1 + 1);
2911 sprintf (t1, "%s:%s", user, passwd);
2913 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
2914 base64_encode (t1, len1, t2);
2916 return concat_strings ("Basic ", t2, (char *) 0);
2919 #define SKIP_WS(x) do { \
2920 while (ISSPACE (*(x))) \
2924 #ifdef ENABLE_DIGEST
2925 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2926 an array of 16 bytes containing the hash keys, and BUF should be a
2927 buffer of 33 writable characters (32 for hex digits plus one for
2928 zero termination). */
2930 dump_hash (char *buf, const unsigned char *hash)
2934 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2936 *buf++ = XNUM_TO_digit (*hash >> 4);
2937 *buf++ = XNUM_TO_digit (*hash & 0xf);
2942 /* Take the line apart to find the challenge, and compose a digest
2943 authorization header. See RFC2069 section 2.1.2. */
2945 digest_authentication_encode (const char *au, const char *user,
2946 const char *passwd, const char *method,
2949 static char *realm, *opaque, *nonce;
2954 { "realm", &realm },
2955 { "opaque", &opaque },
2959 param_token name, value;
2961 realm = opaque = nonce = NULL;
2963 au += 6; /* skip over `Digest' */
2964 while (extract_param (&au, &name, &value, ','))
2967 for (i = 0; i < countof (options); i++)
2968 if (name.e - name.b == strlen (options[i].name)
2969 && 0 == strncmp (name.b, options[i].name, name.e - name.b))
2971 *options[i].variable = strdupdelim (value.b, value.e);
2975 if (!realm || !nonce || !user || !passwd || !path || !method)
2978 xfree_null (opaque);
2983 /* Calculate the digest value. */
2985 ALLOCA_MD5_CONTEXT (ctx);
2986 unsigned char hash[MD5_HASHLEN];
2987 char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2988 char response_digest[MD5_HASHLEN * 2 + 1];
2990 /* A1BUF = H(user ":" realm ":" password) */
2992 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2993 gen_md5_update ((unsigned char *)":", 1, ctx);
2994 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2995 gen_md5_update ((unsigned char *)":", 1, ctx);
2996 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2997 gen_md5_finish (ctx, hash);
2998 dump_hash (a1buf, hash);
3000 /* A2BUF = H(method ":" path) */
3002 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
3003 gen_md5_update ((unsigned char *)":", 1, ctx);
3004 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
3005 gen_md5_finish (ctx, hash);
3006 dump_hash (a2buf, hash);
3008 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3010 gen_md5_update ((unsigned char *)a1buf, MD5_HASHLEN * 2, ctx);
3011 gen_md5_update ((unsigned char *)":", 1, ctx);
3012 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
3013 gen_md5_update ((unsigned char *)":", 1, ctx);
3014 gen_md5_update ((unsigned char *)a2buf, MD5_HASHLEN * 2, ctx);
3015 gen_md5_finish (ctx, hash);
3016 dump_hash (response_digest, hash);
3018 res = xmalloc (strlen (user)
3023 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
3024 + (opaque ? strlen (opaque) : 0)
3026 sprintf (res, "Digest \
3027 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3028 user, realm, nonce, path, response_digest);
3031 char *p = res + strlen (res);
3032 strcat (p, ", opaque=\"");
3039 #endif /* ENABLE_DIGEST */
3041 /* Computing the size of a string literal must take into account that
3042 value returned by sizeof includes the terminating \0. */
3043 #define STRSIZE(literal) (sizeof (literal) - 1)
3045 /* Whether chars in [b, e) begin with the literal string provided as
3046 first argument and are followed by whitespace or terminating \0.
3047 The comparison is case-insensitive. */
3048 #define STARTS(literal, b, e) \
3049 ((e) - (b) >= STRSIZE (literal) \
3050 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3051 && ((e) - (b) == STRSIZE (literal) \
3052 || ISSPACE (b[STRSIZE (literal)])))
3055 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3057 return STARTS ("Basic", hdrbeg, hdrend)
3058 #ifdef ENABLE_DIGEST
3059 || STARTS ("Digest", hdrbeg, hdrend)
3062 || STARTS ("NTLM", hdrbeg, hdrend)
3069 /* Create the HTTP authorization request header. When the
3070 `WWW-Authenticate' response header is seen, according to the
3071 authorization scheme specified in that header (`Basic' and `Digest'
3072 are supported by the current implementation), produce an
3073 appropriate HTTP authorization request header. */
3075 create_authorization_line (const char *au, const char *user,
3076 const char *passwd, const char *method,
3077 const char *path, bool *finished)
3079 /* We are called only with known schemes, so we can dispatch on the
3081 switch (TOUPPER (*au))
3083 case 'B': /* Basic */
3085 return basic_authentication_encode (user, passwd);
3086 #ifdef ENABLE_DIGEST
3087 case 'D': /* Digest */
3089 return digest_authentication_encode (au, user, passwd, method, path);
3092 case 'N': /* NTLM */
3093 if (!ntlm_input (&pconn.ntlm, au))
3098 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3101 /* We shouldn't get here -- this function should be only called
3102 with values approved by known_authentication_scheme_p. */
3110 if (!wget_cookie_jar)
3111 wget_cookie_jar = cookie_jar_new ();
3112 if (opt.cookies_input && !cookies_loaded_p)
3114 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3115 cookies_loaded_p = true;
3122 if (wget_cookie_jar)
3123 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3129 xfree_null (pconn.host);
3130 if (wget_cookie_jar)
3131 cookie_jar_delete (wget_cookie_jar);
3138 test_parse_content_disposition()
3143 char *opt_dir_prefix;
3147 { "filename=\"file.ext\"", NULL, "file.ext", true },
3148 { "filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3149 { "attachment; filename=\"file.ext\"", NULL, "file.ext", true },
3150 { "attachment; filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3151 { "attachment; filename=\"file.ext\"; dummy", NULL, "file.ext", true },
3152 { "attachment; filename=\"file.ext\"; dummy", "somedir", "somedir/file.ext", true },
3153 { "attachment", NULL, NULL, false },
3154 { "attachment", "somedir", NULL, false },
3157 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3162 opt.dir_prefix = test_array[i].opt_dir_prefix;
3163 res = parse_content_disposition (test_array[i].hdrval, &filename);
3165 mu_assert ("test_parse_content_disposition: wrong result",
3166 res == test_array[i].result
3168 || 0 == strcmp (test_array[i].filename, filename)));
3174 #endif /* TESTING */
3177 * vim: et sts=2 sw=2 cino+={s