2 Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
4 This file is part of Wget.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include <sys/types.h>
36 #if TIME_WITH_SYS_TIME
37 # include <sys/time.h>
41 # include <sys/time.h>
65 extern char *version_string;
75 #define TEXTHTML_S "text/html"
76 #define HTTP_ACCEPT "*/*"
78 /* Some status code validation macros: */
79 #define H_20X(x) (((x) >= 200) && ((x) < 300))
80 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
81 #define H_REDIRECTED(x) (((x) == HTTP_STATUS_MOVED_PERMANENTLY) \
82 || ((x) == HTTP_STATUS_MOVED_TEMPORARILY))
84 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
86 #define HTTP_STATUS_OK 200
87 #define HTTP_STATUS_CREATED 201
88 #define HTTP_STATUS_ACCEPTED 202
89 #define HTTP_STATUS_NO_CONTENT 204
90 #define HTTP_STATUS_PARTIAL_CONTENTS 206
92 /* Redirection 3xx. */
93 #define HTTP_STATUS_MULTIPLE_CHOICES 300
94 #define HTTP_STATUS_MOVED_PERMANENTLY 301
95 #define HTTP_STATUS_MOVED_TEMPORARILY 302
96 #define HTTP_STATUS_NOT_MODIFIED 304
98 /* Client error 4xx. */
99 #define HTTP_STATUS_BAD_REQUEST 400
100 #define HTTP_STATUS_UNAUTHORIZED 401
101 #define HTTP_STATUS_FORBIDDEN 403
102 #define HTTP_STATUS_NOT_FOUND 404
104 /* Server errors 5xx. */
105 #define HTTP_STATUS_INTERNAL 500
106 #define HTTP_STATUS_NOT_IMPLEMENTED 501
107 #define HTTP_STATUS_BAD_GATEWAY 502
108 #define HTTP_STATUS_UNAVAILABLE 503
111 /* Parse the HTTP status line, which is of format:
113 HTTP-Version SP Status-Code SP Reason-Phrase
115 The function returns the status-code, or -1 if the status line is
116 malformed. The pointer to reason-phrase is returned in RP. */
118 parse_http_status_line (const char *line, const char **reason_phrase_ptr)
120 /* (the variables must not be named `major' and `minor', because
121 that breaks compilation with SunOS4 cc.) */
122 int mjr, mnr, statcode;
125 *reason_phrase_ptr = NULL;
127 /* The standard format of HTTP-Version is: `HTTP/X.Y', where X is
128 major version, and Y is minor version. */
129 if (strncmp (line, "HTTP/", 5) != 0)
133 /* Calculate major HTTP version. */
135 for (mjr = 0; ISDIGIT (*line); line++)
136 mjr = 10 * mjr + (*line - '0');
137 if (*line != '.' || p == line)
141 /* Calculate minor HTTP version. */
143 for (mnr = 0; ISDIGIT (*line); line++)
144 mnr = 10 * mnr + (*line - '0');
145 if (*line != ' ' || p == line)
147 /* Wget will accept only 1.0 and higher HTTP-versions. The value of
148 minor version can be safely ignored. */
153 /* Calculate status code. */
154 if (!(ISDIGIT (*line) && ISDIGIT (line[1]) && ISDIGIT (line[2])))
156 statcode = 100 * (*line - '0') + 10 * (line[1] - '0') + (line[2] - '0');
158 /* Set up the reason phrase pointer. */
160 /* RFC2068 requires SPC here, but we allow the string to finish
161 here, in case no reason-phrase is present. */
165 *reason_phrase_ptr = line;
170 *reason_phrase_ptr = line + 1;
175 /* Functions to be used as arguments to header_process(): */
177 struct http_process_range_closure {
183 /* Parse the `Content-Range' header and extract the information it
184 contains. Returns 1 if successful, -1 otherwise. */
186 http_process_range (const char *hdr, void *arg)
188 struct http_process_range_closure *closure
189 = (struct http_process_range_closure *)arg;
192 /* Certain versions of Nutscape proxy server send out
193 `Content-Length' without "bytes" specifier, which is a breach of
194 RFC2068 (as well as the HTTP/1.1 draft which was current at the
195 time). But hell, I must support it... */
196 if (!strncasecmp (hdr, "bytes", 5))
199 hdr += skip_lws (hdr);
205 for (num = 0; ISDIGIT (*hdr); hdr++)
206 num = 10 * num + (*hdr - '0');
207 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
209 closure->first_byte_pos = num;
211 for (num = 0; ISDIGIT (*hdr); hdr++)
212 num = 10 * num + (*hdr - '0');
213 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
215 closure->last_byte_pos = num;
217 for (num = 0; ISDIGIT (*hdr); hdr++)
218 num = 10 * num + (*hdr - '0');
219 closure->entity_length = num;
223 /* Place 1 to ARG if the HDR contains the word "none", 0 otherwise.
224 Used for `Accept-Ranges'. */
226 http_process_none (const char *hdr, void *arg)
228 int *where = (int *)arg;
230 if (strstr (hdr, "none"))
237 /* Place the malloc-ed copy of HDR hdr, to the first `;' to ARG. */
239 http_process_type (const char *hdr, void *arg)
241 char **result = (char **)arg;
244 *result = xstrdup (hdr);
245 p = strrchr (hdr, ';');
249 *result = (char *)xmalloc (len + 1);
250 memcpy (*result, hdr, len);
251 (*result)[len] = '\0';
254 *result = xstrdup (hdr);
261 long len; /* received length */
262 long contlen; /* expected length */
263 long restval; /* the restart value */
264 int res; /* the result of last read */
265 char *newloc; /* new location (redirection) */
266 char *remote_time; /* remote time-stamp string */
267 char *error; /* textual HTTP error */
268 int statcode; /* status code */
269 long dltime; /* time of the download */
272 /* Free the elements of hstat X. */
273 #define FREEHSTAT(x) do \
275 FREE_MAYBE ((x).newloc); \
276 FREE_MAYBE ((x).remote_time); \
277 FREE_MAYBE ((x).error); \
278 (x).newloc = (x).remote_time = (x).error = NULL; \
281 static char *create_authorization_line PARAMS ((const char *, const char *,
282 const char *, const char *,
284 static char *basic_authentication_encode PARAMS ((const char *, const char *,
286 static int known_authentication_scheme_p PARAMS ((const char *));
288 static time_t http_atotm PARAMS ((char *));
290 /* Retrieve a document through HTTP protocol. It recognizes status
291 code, and correctly handles redirections. It closes the network
292 socket. If it receives an error from the functions below it, it
293 will print it if there is enough information to do so (almost
294 always), returning the error to the caller (i.e. http_loop).
296 Various HTTP parameters are stored to hs. Although it parses the
297 response code correctly, it is not used in a sane way. The caller
300 If u->proxy is non-NULL, the URL u will be taken as a proxy URL,
301 and u->proxy->url will be given to the proxy server (bad naming,
304 gethttp (struct urlinfo *u, struct http_stat *hs, int *dt)
306 char *request, *type, *command, *path;
308 char *pragma_h, *referer, *useragent, *range, *wwwauth, *remhost;
309 char *authenticate_h;
312 int sock, hcount, num_written, all_length, remport, statcode;
313 long contlen, contrange;
317 int auth_tried_already;
320 /* Let the others worry about local filename... */
321 if (!(*dt & HEAD_ONLY))
322 assert (u->local != NULL);
325 auth_tried_already = 0;
328 /* We need to come back here when the initial attempt to retrieve
329 without authorization header fails. */
331 /* Initialize certain elements of struct hstat. */
336 hs->remote_time = NULL;
339 /* Which structure to use to retrieve the original URL data. */
345 /* First: establish the connection. */
346 logprintf (LOG_VERBOSE, _("Connecting to %s:%hu... "), u->host, u->port);
347 err = make_connection (&sock, u->host, u->port);
351 logputs (LOG_VERBOSE, "\n");
352 logprintf (LOG_NOTQUIET, "%s: %s.\n", u->host, herrmsg (h_errno));
356 logputs (LOG_VERBOSE, "\n");
357 logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno));
361 logputs (LOG_VERBOSE, "\n");
362 logprintf (LOG_NOTQUIET,
363 _("Connection to %s:%hu refused.\n"), u->host, u->port);
367 logputs (LOG_VERBOSE, "\n");
368 logprintf (LOG_NOTQUIET, "connect: %s\n", strerror (errno));
373 /* Everything is fine! */
374 logputs (LOG_VERBOSE, _("connected!\n"));
382 path = u->proxy->url;
385 command = (*dt & HEAD_ONLY) ? "HEAD" : "GET";
389 referer = (char *)alloca (9 + strlen (ou->referer) + 3);
390 sprintf (referer, "Referer: %s\r\n", ou->referer);
392 if (*dt & SEND_NOCACHE)
393 pragma_h = "Pragma: no-cache\r\n";
398 range = (char *)alloca (13 + numdigit (hs->restval) + 4);
399 /* #### Gag me! Some servers (e.g. WebSitePro) have been known
400 to misinterpret the following `Range' format, and return the
401 document as multipart/x-byte-ranges MIME type!
403 #### TODO: Interpret MIME types, recognize bullshits similar
404 the one described above, and deal with them! */
405 sprintf (range, "Range: bytes=%ld-\r\n", hs->restval);
410 STRDUP_ALLOCA (useragent, opt.useragent);
413 useragent = (char *)alloca (10 + strlen (version_string));
414 sprintf (useragent, "Wget/%s", version_string);
416 /* Construct the authentication, if userid is present. */
419 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
420 user = user ? user : opt.http_user;
421 passwd = passwd ? passwd : opt.http_passwd;
424 if (authenticate_h && user && passwd)
426 wwwauth = create_authorization_line (authenticate_h, user, passwd,
433 char *proxy_user, *proxy_passwd;
434 /* For normal username and password, URL components override
435 command-line/wgetrc parameters. With proxy authentication,
436 it's the reverse, because proxy URLs are normally the
437 "permanent" ones, so command-line args should take
439 if (opt.proxy_user && opt.proxy_passwd)
441 proxy_user = opt.proxy_user;
442 proxy_passwd = opt.proxy_passwd;
446 proxy_user = u->user;
447 proxy_passwd = u->passwd;
449 /* #### This is junky. Can't the proxy request, say, `Digest'
451 if (proxy_user && proxy_passwd)
452 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd,
453 "Proxy-Authorization");
457 /* Allocate the memory for the request. */
458 request = (char *)alloca (strlen (command) + strlen (path)
460 + strlen (remhost) + numdigit (remport)
461 + strlen (HTTP_ACCEPT)
462 + (referer ? strlen (referer) : 0)
463 + (wwwauth ? strlen (wwwauth) : 0)
464 + (proxyauth ? strlen (proxyauth) : 0)
465 + (range ? strlen (range) : 0)
467 + (opt.user_header ? strlen (opt.user_header) : 0)
469 /* Construct the request. */
476 command, path, useragent, remhost, remport, HTTP_ACCEPT,
477 referer ? referer : "",
478 wwwauth ? wwwauth : "",
479 proxyauth ? proxyauth : "",
482 opt.user_header ? opt.user_header : "");
483 DEBUGP (("---request begin---\n%s---request end---\n", request));
484 /* Free the temporary memory. */
485 FREE_MAYBE (wwwauth);
486 FREE_MAYBE (proxyauth);
488 /* Send the request to server. */
489 num_written = iwrite (sock, request, strlen (request));
492 logputs (LOG_VERBOSE, _("Failed writing HTTP request.\n"));
497 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
498 u->proxy ? "Proxy" : "HTTP");
499 contlen = contrange = -1;
504 /* Before reading anything, initialize the rbuf. */
505 rbuf_initialize (&rbuf, sock);
509 /* Header-fetching loop. */
517 /* Get the header. */
518 status = header_get (&rbuf, &hdr,
519 /* Disallow continuations for status line. */
520 (hcount == 1 ? HG_NO_CONTINUATIONS : HG_NONE));
522 /* Check for errors. */
523 if (status == HG_EOF && *hdr)
525 /* This used to be an unconditional error, but that was
526 somewhat controversial, because of a large number of
527 broken CGI's that happily "forget" to send the second EOL
528 before closing the connection of a HEAD request.
530 So, the deal is to check whether the header is empty
531 (*hdr is zero if it is); if yes, it means that the
532 previous header was fully retrieved, and that -- most
533 probably -- the request is complete. "...be liberal in
534 what you accept." Oh boy. */
535 logputs (LOG_VERBOSE, "\n");
536 logputs (LOG_NOTQUIET, _("End of file while parsing headers.\n"));
539 FREE_MAYBE (hs->newloc);
540 FREE_MAYBE (all_headers);
544 else if (status == HG_ERROR)
546 logputs (LOG_VERBOSE, "\n");
547 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
551 FREE_MAYBE (hs->newloc);
552 FREE_MAYBE (all_headers);
557 /* If the headers are to be saved to a file later, save them to
559 if (opt.save_headers)
561 int lh = strlen (hdr);
562 all_headers = (char *)xrealloc (all_headers, all_length + lh + 2);
563 memcpy (all_headers + all_length, hdr, lh);
565 all_headers[all_length++] = '\n';
566 all_headers[all_length] = '\0';
569 /* Print the header if requested. */
570 if (opt.server_response && hcount != 1)
571 logprintf (LOG_VERBOSE, "\n%d %s", hcount, hdr);
573 /* Check for status line. */
577 /* Parse the first line of server response. */
578 statcode = parse_http_status_line (hdr, &error);
579 hs->statcode = statcode;
580 /* Store the descriptive response. */
581 if (statcode == -1) /* malformed response */
583 /* A common reason for "malformed response" error is the
584 case when no data was actually received. Handle this
587 hs->error = xstrdup (_("No data received"));
589 hs->error = xstrdup (_("Malformed status line"));
594 hs->error = xstrdup (_("(no description)"));
596 hs->error = xstrdup (error);
603 logprintf (LOG_VERBOSE, "%d %s", statcode, error);
608 /* Exit on empty header. */
615 /* Try getting content-length. */
616 if (contlen == -1 && !opt.ignore_length)
617 if (header_process (hdr, "Content-Length", header_extract_number,
620 /* Try getting content-type. */
622 if (header_process (hdr, "Content-Type", http_process_type, &type))
624 /* Try getting location. */
626 if (header_process (hdr, "Location", header_strdup, &hs->newloc))
628 /* Try getting last-modified. */
629 if (!hs->remote_time)
630 if (header_process (hdr, "Last-Modified", header_strdup,
633 /* Try getting www-authentication. */
635 if (header_process (hdr, "WWW-Authenticate", header_strdup,
638 /* Check for accept-ranges header. If it contains the word
639 `none', disable the ranges. */
640 if (*dt & ACCEPTRANGES)
643 if (header_process (hdr, "Accept-Ranges", http_process_none, &nonep))
646 *dt &= ~ACCEPTRANGES;
650 /* Try getting content-range. */
653 struct http_process_range_closure closure;
654 if (header_process (hdr, "Content-Range", http_process_range, &closure))
656 contrange = closure.first_byte_pos;
664 logputs (LOG_VERBOSE, "\n");
666 if ((statcode == HTTP_STATUS_UNAUTHORIZED)
669 /* Authorization is required. */
674 if (auth_tried_already)
676 /* If we have tried it already, then there is not point
678 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
679 free (authenticate_h);
682 else if (!known_authentication_scheme_p (authenticate_h))
684 free (authenticate_h);
685 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
690 auth_tried_already = 1;
694 /* We do not need this anymore. */
697 free (authenticate_h);
698 authenticate_h = NULL;
701 /* 20x responses are counted among successful by default. */
702 if (H_20X (statcode))
705 if (type && !strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)))
708 /* We don't assume text/html by default. */
713 else if (contrange != hs->restval ||
714 (H_PARTIAL (statcode) && contrange == -1))
716 /* This means the whole request was somehow misunderstood by the
719 FREE_MAYBE (hs->newloc);
720 FREE_MAYBE (all_headers);
728 contlen += contrange;
730 contrange = -1; /* If conent-length was not sent,
731 content-range will be ignored. */
733 hs->contlen = contlen;
735 /* Return if redirected. */
736 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
738 /* RFC2068 says that in case of the 300 (multiple choices)
739 response, the server can output a preferred URL through
740 `Location' header; otherwise, the request should be treated
741 like GET. So, if the location is set, it will be a
742 redirection; otherwise, just proceed normally. */
743 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
747 logprintf (LOG_VERBOSE,
748 _("Location: %s%s\n"),
749 hs->newloc ? hs->newloc : _("unspecified"),
750 hs->newloc ? _(" [following]") : "");
753 FREE_MAYBE (all_headers);
759 if ((*dt & RETROKF) && !opt.server_response)
761 /* No need to print this output if the body won't be
762 downloaded at all, or if the original server response is
764 logputs (LOG_VERBOSE, _("Length: "));
767 logputs (LOG_VERBOSE, legible (contlen));
769 logprintf (LOG_VERBOSE, _(" (%s to go)"),
770 legible (contlen - contrange));
773 logputs (LOG_VERBOSE,
774 opt.ignore_length ? _("ignored") : _("unspecified"));
776 logprintf (LOG_VERBOSE, " [%s]\n", type);
778 logputs (LOG_VERBOSE, "\n");
782 type = NULL; /* We don't need it any more. */
784 /* Return if we have no intention of further downloading. */
785 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
787 /* In case someone cares to look... */
791 FREE_MAYBE (all_headers);
796 /* Open the local file. */
799 mkalldirs (u->local);
801 rotate_backups (u->local);
802 fp = fopen (u->local, hs->restval ? "ab" : "wb");
805 logprintf (LOG_NOTQUIET, "%s: %s\n", u->local, strerror (errno));
807 FREE_MAYBE (all_headers);
814 /* #### This confuses the code that checks for file size. There
815 should be some overhead information. */
816 if (opt.save_headers)
817 fwrite (all_headers, 1, all_length, fp);
819 /* Get the contents of the document. */
820 hs->res = get_contents (sock, fp, &hs->len, hs->restval,
821 (contlen != -1 ? contlen : 0),
823 hs->dltime = elapsed_time ();
828 FREE_MAYBE (all_headers);
835 /* The genuine HTTP loop! This is the part where the retrieval is
836 retried, and retried, and retried, and... */
838 http_loop (struct urlinfo *u, char **newloc, int *dt)
840 static int first_retrieval = 1;
843 int local_dot_orig_file_exists = FALSE;
844 int use_ts, got_head = 0; /* time-stamping info */
845 char *tms, *suf, *locf, *tmrate;
847 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
848 long local_size = 0; /* the size of the local file */
849 struct http_stat hstat; /* HTTP status */
854 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
855 has_wildcards_p because it would also warn on `?', and we know that
856 shows up in CGI paths a *lot*. */
857 if (strchr (u->url, '*'))
858 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
860 /* Determine the local filename. */
862 u->local = url_filename (u->proxy ? u->proxy : u);
864 if (!opt.output_document)
867 locf = opt.output_document;
869 if (opt.noclobber && file_exists_p (u->local))
871 /* If opt.noclobber is turned on and file already exists, do not
873 logprintf (LOG_VERBOSE, _("\
874 File `%s' already there, will not retrieve.\n"), u->local);
875 /* If the file is there, we suppose it's retrieved OK. */
878 /* #### Bogusness alert. */
879 /* If its suffix is "html" or (yuck!) "htm", we suppose it's
880 text/html, a harmless lie. */
881 if (((suf = suffix (u->local)) != NULL)
882 && (!strcmp (suf, "html") || !strcmp (suf, "htm")))
885 /* Another harmless lie: */
890 if (opt.timestamping)
892 boolean local_file_exists = FALSE;
894 if (opt.backup_converted)
895 /* If -K is specified, we'll act on the assumption that it was specified
896 last time these files were downloaded as well, and instead of just
897 comparing local file X against server file X, we'll compare local
898 file X.orig (if extant, else X) against server file X. If -K
899 _wasn't_ specified last time, or the server contains files called
900 *.orig, -N will be back to not operating correctly with -k. */
902 size_t filename_len = strlen(u->local);
903 char* filename_plus_orig_suffix = malloc(filename_len +
906 /* Would a single s[n]printf() call be faster? */
907 strcpy(filename_plus_orig_suffix, u->local);
908 strcpy(filename_plus_orig_suffix + filename_len, ".orig");
910 /* Try to stat() the .orig file. */
911 if (stat(filename_plus_orig_suffix, &st) == 0)
913 local_file_exists = TRUE;
914 local_dot_orig_file_exists = TRUE;
917 free(filename_plus_orig_suffix);
920 if (!local_dot_orig_file_exists)
921 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
922 if (stat (u->local, &st) == 0)
923 local_file_exists = TRUE;
925 if (local_file_exists)
926 /* There was a local file, so we'll check later to see if the version
927 the server has is the same version we already have, allowing us to
932 local_size = st.st_size;
936 /* Reset the counter. */
938 *dt = 0 | ACCEPTRANGES;
942 /* Increment the pass counter. */
944 /* Wait before the retrieval (unless this is the very first
946 if (!first_retrieval && opt.wait)
950 /* Get the current time string. */
951 tms = time_str (NULL);
952 /* Print fetch message, if opt.verbose. */
955 char *hurl = str_url (u->proxy ? u->proxy : u, 1);
959 sprintf (tmp, _("(try:%2d)"), count);
960 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
961 tms, hurl, tmp, locf);
963 ws_changetitle (hurl, 1);
968 /* Default document type is empty. However, if spider mode is
969 on or time-stamping is employed, HEAD_ONLY commands is
970 encoded within *dt. */
971 if (opt.spider || (use_ts && !got_head))
975 /* Assume no restarting. */
977 /* Decide whether or not to restart. */
978 if (((count > 1 && (*dt & ACCEPTRANGES)) || opt.always_rest)
979 && file_exists_p (u->local))
980 if (stat (u->local, &st) == 0)
981 hstat.restval = st.st_size;
982 /* Decide whether to send the no-cache directive. */
983 if (u->proxy && (count > 1 || (opt.proxy_cache == 0)))
986 *dt &= ~SEND_NOCACHE;
988 /* Try fetching the document, or at least its head. :-) */
989 err = gethttp (u, &hstat, dt);
991 tms = time_str (NULL);
992 /* Get the new location (with or without the redirection). */
994 *newloc = xstrdup (hstat.newloc);
997 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
998 case CONERROR: case READERR: case WRITEFAILED:
1000 /* Non-fatal errors continue executing the loop, which will
1001 bring them to "while" statement at the end, to judge
1002 whether the number of tries was exceeded. */
1004 printwhat (count, opt.ntry);
1007 case HOSTERR: case CONREFUSED: case PROXERR: case AUTHFAILED:
1008 /* Fatal errors just return from the function. */
1012 case FWRITEERR: case FOPENERR:
1013 /* Another fatal error. */
1014 logputs (LOG_VERBOSE, "\n");
1015 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
1016 u->local, strerror (errno));
1021 /* Return the new location to the caller. */
1024 logprintf (LOG_NOTQUIET,
1025 _("ERROR: Redirection (%d) without location.\n"),
1033 /* Deal with you later. */
1036 /* All possibilities should have been exhausted. */
1039 if (!(*dt & RETROKF))
1043 /* #### Ugly ugly ugly! */
1044 char *hurl = str_url (u->proxy ? u->proxy : u, 1);
1045 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
1048 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
1049 tms, hstat.statcode, hstat.error);
1050 logputs (LOG_VERBOSE, "\n");
1055 /* Did we get the time-stamp? */
1058 if (opt.timestamping && !hstat.remote_time)
1060 logputs (LOG_NOTQUIET, _("\
1061 Last-modified header missing -- time-stamps turned off.\n"));
1063 else if (hstat.remote_time)
1065 /* Convert the date-string into struct tm. */
1066 tmr = http_atotm (hstat.remote_time);
1067 if (tmr == (time_t) (-1))
1068 logputs (LOG_VERBOSE, _("\
1069 Last-modified header invalid -- time-stamp ignored.\n"));
1073 /* The time-stamping section. */
1078 use_ts = 0; /* no more time-stamping */
1079 count = 0; /* the retrieve count for HEAD is
1081 if (hstat.remote_time && tmr != (time_t) (-1))
1083 /* Now time-stamping can be used validly. Time-stamping
1084 means that if the sizes of the local and remote file
1085 match, and local file is newer than the remote file,
1086 it will not be retrieved. Otherwise, the normal
1087 download procedure is resumed. */
1089 (hstat.contlen == -1 || local_size == hstat.contlen))
1091 if (local_dot_orig_file_exists)
1092 /* We can't collapse this down into just one logprintf()
1093 call with a variable set to u->local or the .orig
1094 filename because we have to malloc() space for the
1095 latter, and because there are multiple returns above (a
1096 coding style no-no by many measures, for reasons such as
1097 this) we'd have to remember to free() the string at each
1098 one to avoid a memory leak. */
1099 logprintf (LOG_VERBOSE, _("\
1100 Server file no newer than local file `%s.orig' -- not retrieving.\n\n"),
1103 logprintf (LOG_VERBOSE, _("\
1104 Server file no newer than local file `%s' -- not retrieving.\n\n"), u->local);
1108 else if (tml >= tmr)
1109 logprintf (LOG_VERBOSE, _("\
1110 The sizes do not match (local %ld) -- retrieving.\n"), local_size);
1112 logputs (LOG_VERBOSE,
1113 _("Remote file is newer, retrieving.\n"));
1119 && (tmr != (time_t) (-1))
1121 && ((hstat.len == hstat.contlen) ||
1122 ((hstat.res == 0) &&
1123 ((hstat.contlen == -1) ||
1124 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
1126 touch (u->local, tmr);
1128 /* End of time-stamping section. */
1132 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode, hstat.error);
1136 /* It is now safe to free the remainder of hstat, since the
1137 strings within it will no longer be used. */
1140 tmrate = rate (hstat.len - hstat.restval, hstat.dltime);
1142 if (hstat.len == hstat.contlen)
1146 logprintf (LOG_VERBOSE,
1147 _("%s (%s) - `%s' saved [%ld/%ld]\n\n"),
1148 tms, tmrate, locf, hstat.len, hstat.contlen);
1149 logprintf (LOG_NONVERBOSE,
1150 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1151 tms, u->url, hstat.len, hstat.contlen, locf, count);
1154 opt.downloaded += hstat.len;
1155 downloaded_file(ADD_FILE, locf);
1158 else if (hstat.res == 0) /* No read error */
1160 if (hstat.contlen == -1) /* We don't know how much we were supposed
1161 to get, so assume we succeeded. */
1165 logprintf (LOG_VERBOSE,
1166 _("%s (%s) - `%s' saved [%ld]\n\n"),
1167 tms, tmrate, locf, hstat.len);
1168 logprintf (LOG_NONVERBOSE,
1169 "%s URL:%s [%ld] -> \"%s\" [%d]\n",
1170 tms, u->url, hstat.len, locf, count);
1173 opt.downloaded += hstat.len;
1174 downloaded_file(ADD_FILE, locf);
1177 else if (hstat.len < hstat.contlen) /* meaning we lost the
1178 connection too soon */
1180 logprintf (LOG_VERBOSE,
1181 _("%s (%s) - Connection closed at byte %ld. "),
1182 tms, tmrate, hstat.len);
1183 printwhat (count, opt.ntry);
1186 else if (!opt.kill_longer) /* meaning we got more than expected */
1188 logprintf (LOG_VERBOSE,
1189 _("%s (%s) - `%s' saved [%ld/%ld])\n\n"),
1190 tms, tmrate, locf, hstat.len, hstat.contlen);
1191 logprintf (LOG_NONVERBOSE,
1192 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1193 tms, u->url, hstat.len, hstat.contlen, locf, count);
1195 opt.downloaded += hstat.len;
1196 downloaded_file(ADD_FILE, locf);
1199 else /* the same, but not accepted */
1201 logprintf (LOG_VERBOSE,
1202 _("%s (%s) - Connection closed at byte %ld/%ld. "),
1203 tms, tmrate, hstat.len, hstat.contlen);
1204 printwhat (count, opt.ntry);
1208 else /* now hstat.res can only be -1 */
1210 if (hstat.contlen == -1)
1212 logprintf (LOG_VERBOSE,
1213 _("%s (%s) - Read error at byte %ld (%s)."),
1214 tms, tmrate, hstat.len, strerror (errno));
1215 printwhat (count, opt.ntry);
1218 else /* hstat.res == -1 and contlen is given */
1220 logprintf (LOG_VERBOSE,
1221 _("%s (%s) - Read error at byte %ld/%ld (%s). "),
1222 tms, tmrate, hstat.len, hstat.contlen,
1224 printwhat (count, opt.ntry);
1231 while (!opt.ntry || (count < opt.ntry));
1235 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
1236 than local timezone (mktime assumes the latter).
1238 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
1239 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO. */
1241 mktime_from_utc (struct tm *t)
1248 tb = mktime (gmtime (&tl));
1249 return (tl <= tb ? (tl + (tl - tb)) : (tl - (tb - tl)));
1252 /* Check whether the result of strptime() indicates success.
1253 strptime() returns the pointer to how far it got to in the string.
1254 The processing has been successful if the string is at `GMT' or
1255 `+X', or at the end of the string.
1257 In extended regexp parlance, the function returns 1 if P matches
1258 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (a valid result of
1259 strptime()) is considered a failure and 0 is returned. */
1265 while (ISSPACE (*p))
1268 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
1269 || ((p[0] == '+' || p[1] == '-') && ISDIGIT (p[1])))
1275 /* Convert TIME_STRING time to time_t. TIME_STRING can be in any of
1276 the three formats RFC2068 allows the HTTP servers to emit --
1277 RFC1123-date, RFC850-date or asctime-date. Timezones are ignored,
1280 We use strptime() to recognize various dates, which makes it a
1281 little bit slacker than the RFC1123/RFC850/asctime (e.g. it always
1282 allows shortened dates and months, one-digit days, etc.). It also
1283 allows more than one space anywhere where the specs require one SP.
1284 The routine should probably be even more forgiving (as recommended
1285 by RFC2068), but I do not have the time to write one.
1287 Return the computed time_t representation, or -1 if all the
1290 Needless to say, what we *really* need here is something like
1291 Marcus Hennecke's atotm(), which is forgiving, fast, to-the-point,
1292 and does not use strptime(). atotm() is to be found in the sources
1293 of `phttpd', a little-known HTTP server written by Peter Erikson. */
1295 http_atotm (char *time_string)
1299 /* Roger Beeman says: "This function dynamically allocates struct tm
1300 t, but does no initialization. The only field that actually
1301 needs initialization is tm_isdst, since the others will be set by
1302 strptime. Since strptime does not set tm_isdst, it will return
1303 the data structure with whatever data was in tm_isdst to begin
1304 with. For those of us in timezones where DST can occur, there
1305 can be a one hour shift depending on the previous contents of the
1306 data area where the data structure is allocated." */
1309 /* Note that under foreign locales Solaris strptime() fails to
1310 recognize English dates, which renders this function useless. I
1311 assume that other non-GNU strptime's are plagued by the same
1312 disease. We solve this by setting only LC_MESSAGES in
1313 i18n_initialize(), instead of LC_ALL.
1315 Another solution could be to temporarily set locale to C, invoke
1316 strptime(), and restore it back. This is slow and dirty,
1317 however, and locale support other than LC_MESSAGES can mess other
1318 things, so I rather chose to stick with just setting LC_MESSAGES.
1320 Also note that none of this is necessary under GNU strptime(),
1321 because it recognizes both international and local dates. */
1323 /* NOTE: We don't use `%n' for white space, as OSF's strptime uses
1324 it to eat all white space up to (and including) a newline, and
1325 the function fails if there is no newline (!).
1327 Let's hope all strptime() implementations use ` ' to skip *all*
1328 whitespace instead of just one (it works that way on all the
1329 systems I've tested it on). */
1331 /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
1332 if (check_end (strptime (time_string, "%a, %d %b %Y %T", &t)))
1333 return mktime_from_utc (&t);
1334 /* RFC850: Thu, 29-Jan-98 22:12:57 */
1335 if (check_end (strptime (time_string, "%a, %d-%b-%y %T", &t)))
1336 return mktime_from_utc (&t);
1337 /* asctime: Thu Jan 29 22:12:57 1998 */
1338 if (check_end (strptime (time_string, "%a %b %d %T %Y", &t)))
1339 return mktime_from_utc (&t);
1344 /* Authorization support: We support two authorization schemes:
1346 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
1348 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
1349 consisting of answering to the server's challenge with the proper
1352 /* How many bytes it will take to store LEN bytes in base64. */
1353 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
1355 /* Encode the string S of length LENGTH to base64 format and place it
1356 to STORE. STORE will be 0-terminated, and must point to a writable
1357 buffer of at least 1+BASE64_LENGTH(length) bytes. */
1359 base64_encode (const char *s, char *store, int length)
1361 /* Conversion table. */
1362 static char tbl[64] = {
1363 'A','B','C','D','E','F','G','H',
1364 'I','J','K','L','M','N','O','P',
1365 'Q','R','S','T','U','V','W','X',
1366 'Y','Z','a','b','c','d','e','f',
1367 'g','h','i','j','k','l','m','n',
1368 'o','p','q','r','s','t','u','v',
1369 'w','x','y','z','0','1','2','3',
1370 '4','5','6','7','8','9','+','/'
1373 unsigned char *p = (unsigned char *)store;
1375 /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
1376 for (i = 0; i < length; i += 3)
1378 *p++ = tbl[s[0] >> 2];
1379 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
1380 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
1381 *p++ = tbl[s[2] & 0x3f];
1384 /* Pad the result if necessary... */
1385 if (i == length + 1)
1387 else if (i == length + 2)
1388 *(p - 1) = *(p - 2) = '=';
1389 /* ...and zero-terminate it. */
1393 /* Create the authentication header contents for the `Basic' scheme.
1394 This is done by encoding the string `USER:PASS' in base64 and
1395 prepending `HEADER: Basic ' to it. */
1397 basic_authentication_encode (const char *user, const char *passwd,
1400 char *t1, *t2, *res;
1401 int len1 = strlen (user) + 1 + strlen (passwd);
1402 int len2 = BASE64_LENGTH (len1);
1404 t1 = (char *)alloca (len1 + 1);
1405 sprintf (t1, "%s:%s", user, passwd);
1406 t2 = (char *)alloca (1 + len2);
1407 base64_encode (t1, t2, len1);
1408 res = (char *)malloc (len2 + 11 + strlen (header));
1409 sprintf (res, "%s: Basic %s\r\n", header, t2);
1415 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
1416 of a field in such a header. If the field is the one specified by
1417 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
1418 digest authorization code), extract its value in the (char*)
1419 variable pointed by RET. Returns negative on a malformed header,
1420 or number of bytes that have been parsed by this call. */
1422 extract_header_attr (const char *au, const char *attr_name, char **ret)
1424 const char *cp, *ep;
1428 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
1430 cp += strlen (attr_name);
1433 cp += skip_lws (cp);
1438 cp += skip_lws (cp);
1443 for (ep = cp; *ep && *ep != '\"'; ep++)
1448 *ret = strdupdelim (cp, ep);
1455 /* Response value needs to be in lowercase, so we cannot use HEXD2ASC
1456 from url.h. See RFC 2069 2.1.2 for the syntax of response-digest. */
1457 #define HEXD2asc(x) (((x) < 10) ? ((x) + '0') : ((x) - 10 + 'a'))
1459 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
1460 an array of 16 bytes containing the hash keys, and BUF should be a
1461 buffer of 33 writable characters (32 for hex digits plus one for
1462 zero termination). */
1464 dump_hash (unsigned char *buf, const unsigned char *hash)
1468 for (i = 0; i < MD5_HASHLEN; i++, hash++)
1470 *buf++ = HEXD2asc (*hash >> 4);
1471 *buf++ = HEXD2asc (*hash & 0xf);
1476 /* Take the line apart to find the challenge, and compose a digest
1477 authorization header. See RFC2069 section 2.1.2. */
1479 digest_authentication_encode (const char *au, const char *user,
1480 const char *passwd, const char *method,
1483 static char *realm, *opaque, *nonce;
1488 { "realm", &realm },
1489 { "opaque", &opaque },
1494 realm = opaque = nonce = NULL;
1496 au += 6; /* skip over `Digest' */
1501 au += skip_lws (au);
1502 for (i = 0; i < ARRAY_SIZE (options); i++)
1504 int skip = extract_header_attr (au, options[i].name,
1505 options[i].variable);
1509 FREE_MAYBE (opaque);
1519 if (i == ARRAY_SIZE (options))
1521 while (*au && *au != '=')
1525 au += skip_lws (au);
1529 while (*au && *au != '\"')
1536 while (*au && *au != ',')
1541 if (!realm || !nonce || !user || !passwd || !path || !method)
1544 FREE_MAYBE (opaque);
1549 /* Calculate the digest value. */
1552 unsigned char hash[MD5_HASHLEN];
1553 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
1554 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
1556 /* A1BUF = H(user ":" realm ":" password) */
1557 md5_init_ctx (&ctx);
1558 md5_process_bytes (user, strlen (user), &ctx);
1559 md5_process_bytes (":", 1, &ctx);
1560 md5_process_bytes (realm, strlen (realm), &ctx);
1561 md5_process_bytes (":", 1, &ctx);
1562 md5_process_bytes (passwd, strlen (passwd), &ctx);
1563 md5_finish_ctx (&ctx, hash);
1564 dump_hash (a1buf, hash);
1566 /* A2BUF = H(method ":" path) */
1567 md5_init_ctx (&ctx);
1568 md5_process_bytes (method, strlen (method), &ctx);
1569 md5_process_bytes (":", 1, &ctx);
1570 md5_process_bytes (path, strlen (path), &ctx);
1571 md5_finish_ctx (&ctx, hash);
1572 dump_hash (a2buf, hash);
1574 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
1575 md5_init_ctx (&ctx);
1576 md5_process_bytes (a1buf, MD5_HASHLEN * 2, &ctx);
1577 md5_process_bytes (":", 1, &ctx);
1578 md5_process_bytes (nonce, strlen (nonce), &ctx);
1579 md5_process_bytes (":", 1, &ctx);
1580 md5_process_bytes (a2buf, MD5_HASHLEN * 2, &ctx);
1581 md5_finish_ctx (&ctx, hash);
1582 dump_hash (response_digest, hash);
1584 res = (char*) xmalloc (strlen (user)
1589 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
1590 + (opaque ? strlen (opaque) : 0)
1592 sprintf (res, "Authorization: Digest \
1593 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
1594 user, realm, nonce, path, response_digest);
1597 char *p = res + strlen (res);
1598 strcat (p, ", opaque=\"");
1602 strcat (res, "\r\n");
1606 #endif /* USE_DIGEST */
1609 #define HACK_O_MATIC(line, string_constant) \
1610 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1611 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1612 || !line[sizeof (string_constant) - 1]))
1615 known_authentication_scheme_p (const char *au)
1617 return HACK_O_MATIC (au, "Basic") || HACK_O_MATIC (au, "Digest");
1622 /* Create the HTTP authorization request header. When the
1623 `WWW-Authenticate' response header is seen, according to the
1624 authorization scheme specified in that header (`Basic' and `Digest'
1625 are supported by the current implementation), produce an
1626 appropriate HTTP authorization request header. */
1628 create_authorization_line (const char *au, const char *user,
1629 const char *passwd, const char *method,
1632 char *wwwauth = NULL;
1634 if (!strncasecmp (au, "Basic", 5))
1635 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
1637 else if (!strncasecmp (au, "Digest", 6))
1638 wwwauth = digest_authentication_encode (au, user, passwd, method, path);
1639 #endif /* USE_DIGEST */