2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 In addition, as a special exception, the Free Software Foundation
22 gives permission to link the code of its release of Wget with the
23 OpenSSL project's "OpenSSL" library (or with modified versions of it
24 that use the same license as the "OpenSSL" library), and distribute
25 the linked executables. You must obey the GNU General Public License
26 in all respects for all of the code used other than "OpenSSL". If you
27 modify this file, you may extend this exception to your version of the
28 file, but you are not obligated to do so. If you do not wish to do
29 so, delete this exception statement from your version. */
35 #include <sys/types.h>
46 #if TIME_WITH_SYS_TIME
47 # include <sys/time.h>
51 # include <sys/time.h>
69 # include "gen_sslfunc.h"
77 extern char *version_string;
78 extern LARGE_INT total_downloaded_bytes;
81 static int cookies_loaded_p;
82 struct cookie_jar *wget_cookie_jar;
84 #define TEXTHTML_S "text/html"
85 #define TEXTXHTML_S "application/xhtml+xml"
86 #define HTTP_ACCEPT "*/*"
88 /* Some status code validation macros: */
89 #define H_20X(x) (((x) >= 200) && ((x) < 300))
90 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
91 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
92 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
93 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
95 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
97 #define HTTP_STATUS_OK 200
98 #define HTTP_STATUS_CREATED 201
99 #define HTTP_STATUS_ACCEPTED 202
100 #define HTTP_STATUS_NO_CONTENT 204
101 #define HTTP_STATUS_PARTIAL_CONTENTS 206
103 /* Redirection 3xx. */
104 #define HTTP_STATUS_MULTIPLE_CHOICES 300
105 #define HTTP_STATUS_MOVED_PERMANENTLY 301
106 #define HTTP_STATUS_MOVED_TEMPORARILY 302
107 #define HTTP_STATUS_NOT_MODIFIED 304
108 #define HTTP_STATUS_TEMPORARY_REDIRECT 307
110 /* Client error 4xx. */
111 #define HTTP_STATUS_BAD_REQUEST 400
112 #define HTTP_STATUS_UNAUTHORIZED 401
113 #define HTTP_STATUS_FORBIDDEN 403
114 #define HTTP_STATUS_NOT_FOUND 404
116 /* Server errors 5xx. */
117 #define HTTP_STATUS_INTERNAL 500
118 #define HTTP_STATUS_NOT_IMPLEMENTED 501
119 #define HTTP_STATUS_BAD_GATEWAY 502
120 #define HTTP_STATUS_UNAVAILABLE 503
123 /* Parse the HTTP status line, which is of format:
125 HTTP-Version SP Status-Code SP Reason-Phrase
127 The function returns the status-code, or -1 if the status line is
128 malformed. The pointer to reason-phrase is returned in RP. */
130 parse_http_status_line (const char *line, const char **reason_phrase_ptr)
132 /* (the variables must not be named `major' and `minor', because
133 that breaks compilation with SunOS4 cc.) */
134 int mjr, mnr, statcode;
137 *reason_phrase_ptr = NULL;
139 /* The standard format of HTTP-Version is: `HTTP/X.Y', where X is
140 major version, and Y is minor version. */
141 if (strncmp (line, "HTTP/", 5) != 0)
145 /* Calculate major HTTP version. */
147 for (mjr = 0; ISDIGIT (*line); line++)
148 mjr = 10 * mjr + (*line - '0');
149 if (*line != '.' || p == line)
153 /* Calculate minor HTTP version. */
155 for (mnr = 0; ISDIGIT (*line); line++)
156 mnr = 10 * mnr + (*line - '0');
157 if (*line != ' ' || p == line)
159 /* Wget will accept only 1.0 and higher HTTP-versions. The value of
160 minor version can be safely ignored. */
165 /* Calculate status code. */
166 if (!(ISDIGIT (*line) && ISDIGIT (line[1]) && ISDIGIT (line[2])))
168 statcode = 100 * (*line - '0') + 10 * (line[1] - '0') + (line[2] - '0');
170 /* Set up the reason phrase pointer. */
172 /* RFC2068 requires SPC here, but we allow the string to finish
173 here, in case no reason-phrase is present. */
177 *reason_phrase_ptr = line;
182 *reason_phrase_ptr = line + 1;
187 #define WMIN(x, y) ((x) > (y) ? (y) : (x))
189 /* Send the contents of FILE_NAME to SOCK/SSL. Make sure that exactly
190 PROMISED_SIZE bytes are sent over the wire -- if the file is
191 longer, read only that much; if the file is shorter, report an error. */
194 post_file (int sock, const char *file_name, long promised_size)
196 static char chunk[8192];
201 DEBUGP (("[writing POST file %s ... ", file_name));
203 fp = fopen (file_name, "rb");
206 while (!feof (fp) && written < promised_size)
209 int length = fread (chunk, 1, sizeof (chunk), fp);
212 towrite = WMIN (promised_size - written, length);
213 write_error = fd_write (sock, chunk, towrite, -1);
223 /* If we've written less than was promised, report a (probably
224 nonsensical) error rather than break the promise. */
225 if (written < promised_size)
231 assert (written == promised_size);
232 DEBUGP (("done]\n"));
237 next_header (const char *h)
239 const char *end = NULL;
243 p = strchr (p, '\n');
248 while (*p == ' ' || *p == '\t');
254 /* Functions to be used as arguments to header_process(): */
256 struct http_process_range_closure {
262 /* Parse the `Content-Range' header and extract the information it
263 contains. Returns 1 if successful, -1 otherwise. */
265 http_process_range (const char *hdr, void *arg)
267 struct http_process_range_closure *closure
268 = (struct http_process_range_closure *)arg;
271 /* Certain versions of Nutscape proxy server send out
272 `Content-Length' without "bytes" specifier, which is a breach of
273 RFC2068 (as well as the HTTP/1.1 draft which was current at the
274 time). But hell, I must support it... */
275 if (!strncasecmp (hdr, "bytes", 5))
278 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
282 hdr += skip_lws (hdr);
288 for (num = 0; ISDIGIT (*hdr); hdr++)
289 num = 10 * num + (*hdr - '0');
290 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
292 closure->first_byte_pos = num;
294 for (num = 0; ISDIGIT (*hdr); hdr++)
295 num = 10 * num + (*hdr - '0');
296 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
298 closure->last_byte_pos = num;
300 for (num = 0; ISDIGIT (*hdr); hdr++)
301 num = 10 * num + (*hdr - '0');
302 closure->entity_length = num;
306 /* Place 1 to ARG if the HDR contains the word "none", 0 otherwise.
307 Used for `Accept-Ranges'. */
309 http_process_none (const char *hdr, void *arg)
311 int *where = (int *)arg;
313 if (strstr (hdr, "none"))
320 /* Place the malloc-ed copy of HDR hdr, to the first `;' to ARG. */
322 http_process_type (const char *hdr, void *arg)
324 char **result = (char **)arg;
325 /* Locate P on `;' or the terminating zero, whichever comes first. */
326 const char *p = strchr (hdr, ';');
328 p = hdr + strlen (hdr);
329 while (p > hdr && ISSPACE (*(p - 1)))
331 *result = strdupdelim (hdr, p);
335 /* Check whether the `Connection' header is set to "keep-alive". */
337 http_process_connection (const char *hdr, void *arg)
339 int *flag = (int *)arg;
340 if (!strcasecmp (hdr, "Keep-Alive"))
345 /* Commit the cookie to the cookie jar. */
348 http_process_set_cookie (const char *hdr, void *arg)
350 struct url *u = (struct url *)arg;
352 /* The jar should have been created by now. */
353 assert (wget_cookie_jar != NULL);
355 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port, u->path, hdr);
360 /* Persistent connections. Currently, we cache the most recently used
361 connection as persistent, provided that the HTTP server agrees to
362 make it such. The persistence data is stored in the variables
363 below. Ideally, it should be possible to cache an arbitrary fixed
364 number of these connections. */
366 /* Whether a persistent connection is active. */
367 static int pconn_active;
370 /* The socket of the connection. */
373 /* Host and port of the currently active persistent connection. */
377 /* Whether a ssl handshake has occoured on this connection. */
381 /* Mark the persistent connection as invalid and free the resources it
382 uses. This is used by the CLOSE_* macros after they forcefully
383 close a registered persistent connection. */
386 invalidate_persistent (void)
388 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
390 fd_close (pconn.socket);
395 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
396 persistent. This will enable someone to use the same connection
397 later. In the context of HTTP, this must be called only AFTER the
398 response has been received and the server has promised that the
399 connection will remain alive.
401 If a previous connection was persistent, it is closed. */
404 register_persistent (const char *host, int port, int fd, int ssl)
408 if (pconn.socket == fd)
410 /* The connection FD is already registered. */
415 /* The old persistent connection is still active; close it
416 first. This situation arises whenever a persistent
417 connection exists, but we then connect to a different
418 host, and try to register a persistent connection to that
420 invalidate_persistent ();
426 pconn.host = xstrdup (host);
430 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
433 /* Return non-zero if a persistent connection is available for
434 connecting to HOST:PORT. */
437 persistent_available_p (const char *host, int port, int ssl,
438 int *host_lookup_failed)
440 /* First, check whether a persistent connection is active at all. */
444 /* If we want SSL and the last connection wasn't or vice versa,
445 don't use it. Checking for host and port is not enough because
446 HTTP and HTTPS can apparently coexist on the same port. */
447 if (ssl != pconn.ssl)
450 /* If we're not connecting to the same port, we're not interested. */
451 if (port != pconn.port)
454 /* If the host is the same, we're in business. If not, there is
455 still hope -- read below. */
456 if (0 != strcasecmp (host, pconn.host))
458 /* If pconn.socket is already talking to HOST, we needn't
459 reconnect. This happens often when both sites are virtual
460 hosts distinguished only by name and served by the same
461 network interface, and hence the same web server (possibly
462 set up by the ISP and serving many different web sites).
463 This admittedly non-standard optimization does not contradict
464 HTTP and works well with popular server software. */
468 struct address_list *al;
471 /* Don't try to talk to two different SSL sites over the same
472 secure connection! (Besides, it's not clear if name-based
473 virtual hosting is even possible with SSL.) */
476 /* If pconn.socket's peer is one of the IP addresses HOST
477 resolves to, pconn.socket is for all intents and purposes
478 already talking to HOST. */
480 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
482 /* Can't get the peer's address -- something must be very
483 wrong with the connection. */
484 invalidate_persistent ();
487 al = lookup_host (host, 0);
490 *host_lookup_failed = 1;
494 found = address_list_contains (al, &ip);
495 address_list_release (al);
500 /* The persistent connection's peer address was found among the
501 addresses HOST resolved to; therefore, pconn.sock is in fact
502 already talking to HOST -- no need to reconnect. */
505 /* Finally, check whether the connection is still open. This is
506 important because most server implement a liberal (short) timeout
507 on persistent connections. Wget can of course always reconnect
508 if the connection doesn't work out, but it's nicer to know in
509 advance. This test is a logical followup of the first test, but
510 is "expensive" and therefore placed at the end of the list. */
512 if (!test_socket_open (pconn.socket))
514 /* Oops, the socket is no longer open. Now that we know that,
515 let's invalidate the persistent connection before returning
517 invalidate_persistent ();
524 /* The idea behind these two CLOSE macros is to distinguish between
525 two cases: one when the job we've been doing is finished, and we
526 want to close the connection and leave, and two when something is
527 seriously wrong and we're closing the connection as part of
530 In case of keep_alive, CLOSE_FINISH should leave the connection
531 open, while CLOSE_INVALIDATE should still close it.
533 Note that the semantics of the flag `keep_alive' is "this
534 connection *will* be reused (the server has promised not to close
535 the connection once we're done)", while the semantics of
536 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
537 active, registered connection". */
539 #define CLOSE_FINISH(fd) do { \
542 if (pconn_active && (fd) == pconn.socket) \
543 invalidate_persistent (); \
549 #define CLOSE_INVALIDATE(fd) do { \
550 if (pconn_active && (fd) == pconn.socket) \
551 invalidate_persistent (); \
558 long len; /* received length */
559 long contlen; /* expected length */
560 long restval; /* the restart value */
561 int res; /* the result of last read */
562 char *newloc; /* new location (redirection) */
563 char *remote_time; /* remote time-stamp string */
564 char *error; /* textual HTTP error */
565 int statcode; /* status code */
566 double dltime; /* time of the download in msecs */
567 int no_truncate; /* whether truncating the file is
569 const char *referer; /* value of the referer header. */
570 char **local_file; /* local file. */
574 free_hstat (struct http_stat *hs)
576 xfree_null (hs->newloc);
577 xfree_null (hs->remote_time);
578 xfree_null (hs->error);
580 /* Guard against being called twice. */
582 hs->remote_time = NULL;
586 static char *create_authorization_line PARAMS ((const char *, const char *,
587 const char *, const char *,
589 static char *basic_authentication_encode PARAMS ((const char *, const char *,
591 static int known_authentication_scheme_p PARAMS ((const char *));
593 time_t http_atotm PARAMS ((const char *));
595 #define BEGINS_WITH(line, string_constant) \
596 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
597 && (ISSPACE (line[sizeof (string_constant) - 1]) \
598 || !line[sizeof (string_constant) - 1]))
600 /* Retrieve a document through HTTP protocol. It recognizes status
601 code, and correctly handles redirections. It closes the network
602 socket. If it receives an error from the functions below it, it
603 will print it if there is enough information to do so (almost
604 always), returning the error to the caller (i.e. http_loop).
606 Various HTTP parameters are stored to hs.
608 If PROXY is non-NULL, the connection will be made to the proxy
609 server, and u->url will be requested. */
611 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
613 char *request, *type, *command, *full_path;
615 char *pragma_h, *referer, *useragent, *range, *wwwauth;
616 char *authenticate_h;
619 char *request_keep_alive;
620 int sock, hcount, statcode;
622 long contlen, contrange;
625 int auth_tried_already;
627 char *cookies = NULL;
630 const char *hdr_beg, *hdr_end;
632 /* Whether this connection will be kept alive after the HTTP request
636 /* Flags that detect the two ways of specifying HTTP keep-alive
638 int http_keep_alive_1, http_keep_alive_2;
640 /* Whether keep-alive should be inhibited. */
641 int inhibit_keep_alive;
643 /* Whether we need to print the host header with braces around host,
644 e.g. "Host: [3ffe:8100:200:2::2]:1234" instead of the usual
645 "Host: symbolic-name:1234". */
646 int squares_around_host = 0;
648 /* Headers sent when using POST. */
649 char *post_content_type, *post_content_length;
650 long post_data_size = 0;
652 int host_lookup_failed;
655 /* Initialize the SSL context. After the first run, this is a
659 case SSLERRCTXCREATE:
661 logprintf (LOG_NOTQUIET, _("Failed to set up an SSL context\n"));
662 return SSLERRCTXCREATE;
664 /* try without certfile */
665 logprintf (LOG_NOTQUIET,
666 _("Failed to load certificates from %s\n"),
668 logprintf (LOG_NOTQUIET,
669 _("Trying without the specified certificate\n"));
672 logprintf (LOG_NOTQUIET,
673 _("Failed to get certificate key from %s\n"),
675 logprintf (LOG_NOTQUIET,
676 _("Trying without the specified certificate\n"));
681 #endif /* HAVE_SSL */
683 if (!(*dt & HEAD_ONLY))
684 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
685 know the local filename so we can save to it. */
686 assert (*hs->local_file != NULL);
689 auth_tried_already = 0;
691 inhibit_keep_alive = !opt.http_keep_alive || proxy != NULL;
694 /* We need to come back here when the initial attempt to retrieve
695 without authorization header fails. (Expected to happen at least
696 for the Digest authorization scheme.) */
699 http_keep_alive_1 = http_keep_alive_2 = 0;
701 post_content_type = NULL;
702 post_content_length = NULL;
704 /* Initialize certain elements of struct http_stat. */
709 hs->remote_time = NULL;
712 /* If we're using a proxy, we will be connecting to the proxy
714 conn = proxy ? proxy : u;
716 host_lookup_failed = 0;
718 /* First: establish the connection. */
719 if (inhibit_keep_alive
720 || !persistent_available_p (conn->host, conn->port,
722 u->scheme == SCHEME_HTTPS
726 , &host_lookup_failed))
728 /* In its current implementation, persistent_available_p will
729 look up conn->host in some cases. If that lookup failed, we
730 don't need to bother with connect_to_host. */
731 if (host_lookup_failed)
734 sock = connect_to_host (conn->host, conn->port);
738 return (retryable_socket_connect_error (errno)
739 ? CONERROR : CONIMPOSSIBLE);
742 if (conn->scheme == SCHEME_HTTPS)
744 if (!ssl_connect (sock))
746 logputs (LOG_VERBOSE, "\n");
747 logprintf (LOG_NOTQUIET,
748 _("Unable to establish SSL connection.\n"));
754 #endif /* HAVE_SSL */
758 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
759 pconn.host, pconn.port);
761 using_ssl = pconn.ssl;
762 DEBUGP (("Reusing fd %d.\n", sock));
767 else if (opt.post_file_name || opt.post_data)
775 referer = (char *)alloca (9 + strlen (hs->referer) + 3);
776 sprintf (referer, "Referer: %s\r\n", hs->referer);
779 if (*dt & SEND_NOCACHE)
780 pragma_h = "Pragma: no-cache\r\n";
786 range = (char *)alloca (13 + numdigit (hs->restval) + 4);
787 /* Gag me! Some servers (e.g. WebSitePro) have been known to
788 respond to the following `Range' format by generating a
789 multipart/x-byte-ranges MIME document! This MIME type was
790 present in an old draft of the byteranges specification.
791 HTTP/1.1 specifies a multipart/byte-ranges MIME type, but
792 only if multiple non-overlapping ranges are requested --
793 which Wget never does. */
794 sprintf (range, "Range: bytes=%ld-\r\n", hs->restval);
799 STRDUP_ALLOCA (useragent, opt.useragent);
802 useragent = (char *)alloca (10 + strlen (version_string));
803 sprintf (useragent, "Wget/%s", version_string);
805 /* Construct the authentication, if userid is present. */
808 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
809 user = user ? user : opt.http_user;
810 passwd = passwd ? passwd : opt.http_passwd;
817 /* We have the username and the password, but haven't tried
818 any authorization yet. Let's see if the "Basic" method
819 works. If not, we'll come back here and construct a
820 proper authorization method with the right challenges.
822 If we didn't employ this kind of logic, every URL that
823 requires authorization would have to be processed twice,
824 which is very suboptimal and generates a bunch of false
825 "unauthorized" errors in the server log.
827 #### But this logic also has a serious problem when used
828 with stronger authentications: we *first* transmit the
829 username and the password in clear text, and *then*
830 attempt a stronger authentication scheme. That cannot be
831 right! We are only fortunate that almost everyone still
832 uses the `Basic' scheme anyway.
834 There should be an option to prevent this from happening,
835 for those who use strong authentication schemes and value
837 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
841 /* Use the full path, i.e. one that includes the leading
842 slash and the query string, but is independent of proxy
844 char *pth = url_full_path (u);
845 wwwauth = create_authorization_line (authenticate_h, user, passwd,
854 char *proxy_user, *proxy_passwd;
855 /* For normal username and password, URL components override
856 command-line/wgetrc parameters. With proxy authentication,
857 it's the reverse, because proxy URLs are normally the
858 "permanent" ones, so command-line args should take
860 if (opt.proxy_user && opt.proxy_passwd)
862 proxy_user = opt.proxy_user;
863 proxy_passwd = opt.proxy_passwd;
867 proxy_user = proxy->user;
868 proxy_passwd = proxy->passwd;
870 /* #### This does not appear right. Can't the proxy request,
871 say, `Digest' authentication? */
872 if (proxy_user && proxy_passwd)
873 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd,
874 "Proxy-Authorization");
877 /* String of the form :PORT. Used only for non-standard ports. */
879 if (u->port != scheme_default_port (u->scheme))
881 port_maybe = (char *)alloca (numdigit (u->port) + 2);
882 sprintf (port_maybe, ":%d", u->port);
885 if (!inhibit_keep_alive)
886 request_keep_alive = "Connection: Keep-Alive\r\n";
888 request_keep_alive = NULL;
891 cookies = cookie_header (wget_cookie_jar, u->host, u->port, u->path,
893 u->scheme == SCHEME_HTTPS
899 if (opt.post_data || opt.post_file_name)
901 post_content_type = "Content-Type: application/x-www-form-urlencoded\r\n";
903 post_data_size = strlen (opt.post_data);
906 post_data_size = file_size (opt.post_file_name);
907 if (post_data_size == -1)
909 logprintf (LOG_NOTQUIET, "POST data file missing: %s\n",
914 post_content_length = xmalloc (16 + numdigit (post_data_size) + 2 + 1);
915 sprintf (post_content_length,
916 "Content-Length: %ld\r\n", post_data_size);
920 full_path = xstrdup (u->url);
922 /* Use the full path, i.e. one that includes the leading slash and
923 the query string. E.g. if u->path is "foo/bar" and u->query is
924 "param=value", full_path will be "/foo/bar?param=value". */
925 full_path = url_full_path (u);
927 if (strchr (u->host, ':'))
928 squares_around_host = 1;
930 /* Allocate the memory for the request. */
931 request = (char *)alloca (strlen (command)
935 + (port_maybe ? strlen (port_maybe) : 0)
936 + strlen (HTTP_ACCEPT)
937 + (request_keep_alive
938 ? strlen (request_keep_alive) : 0)
939 + (referer ? strlen (referer) : 0)
940 + (cookies ? strlen (cookies) : 0)
941 + (wwwauth ? strlen (wwwauth) : 0)
942 + (proxyauth ? strlen (proxyauth) : 0)
943 + (range ? strlen (range) : 0)
946 ? strlen (post_content_type) : 0)
947 + (post_content_length
948 ? strlen (post_content_length) : 0)
949 + (opt.user_header ? strlen (opt.user_header) : 0)
951 /* Construct the request. */
957 %s%s%s%s%s%s%s%s%s%s\r\n",
960 squares_around_host ? "[" : "", u->host, squares_around_host ? "]" : "",
961 port_maybe ? port_maybe : "",
963 request_keep_alive ? request_keep_alive : "",
964 referer ? referer : "",
965 cookies ? cookies : "",
966 wwwauth ? wwwauth : "",
967 proxyauth ? proxyauth : "",
970 post_content_type ? post_content_type : "",
971 post_content_length ? post_content_length : "",
972 opt.user_header ? opt.user_header : "");
973 DEBUGP (("\n---request begin---\n%s", request));
975 /* Free the temporary memory. */
976 xfree_null (wwwauth);
977 xfree_null (proxyauth);
978 xfree_null (cookies);
981 /* Send the request to server. */
982 write_error = fd_write (sock, request, strlen (request), -1);
984 if (write_error >= 0)
988 DEBUGP (("[POST data: %s]\n", opt.post_data));
989 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
991 else if (opt.post_file_name && post_data_size != 0)
992 write_error = post_file (sock, opt.post_file_name, post_data_size);
994 DEBUGP (("---request end---\n"));
998 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
1000 CLOSE_INVALIDATE (sock);
1003 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1004 proxy ? "Proxy" : "HTTP");
1005 contlen = contrange = -1;
1010 DEBUGP (("\n---response begin---\n"));
1012 head = fd_read_head (sock);
1015 logputs (LOG_VERBOSE, "\n");
1018 logputs (LOG_NOTQUIET, _("No data received.\n"));
1019 CLOSE_INVALIDATE (sock);
1024 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1026 CLOSE_INVALIDATE (sock);
1031 /* Loop through the headers and process them. */
1034 for (hdr_beg = head;
1035 (hdr_end = next_header (hdr_beg));
1038 char *hdr = strdupdelim (hdr_beg, hdr_end);
1040 char *tmp = hdr + strlen (hdr);
1041 if (tmp > hdr && tmp[-1] == '\n')
1043 if (tmp > hdr && tmp[-1] == '\r')
1048 /* Check for status line. */
1052 /* Parse the first line of server response. */
1053 statcode = parse_http_status_line (hdr, &error);
1054 hs->statcode = statcode;
1055 /* Store the descriptive response. */
1056 if (statcode == -1) /* malformed response */
1058 /* A common reason for "malformed response" error is the
1059 case when no data was actually received. Handle this
1062 hs->error = xstrdup (_("No data received"));
1064 hs->error = xstrdup (_("Malformed status line"));
1069 hs->error = xstrdup (_("(no description)"));
1071 hs->error = xstrdup (error);
1073 if ((statcode != -1)
1079 if (opt.server_response)
1080 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1082 logprintf (LOG_VERBOSE, "%2d %s", statcode, error);
1088 /* Exit on empty header. */
1095 /* Print the header if requested. */
1096 if (opt.server_response && hcount != 1)
1097 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1099 /* Try getting content-length. */
1100 if (contlen == -1 && !opt.ignore_length)
1101 if (header_process (hdr, "Content-Length", header_extract_number,
1104 /* Try getting content-type. */
1106 if (header_process (hdr, "Content-Type", http_process_type, &type))
1108 /* Try getting location. */
1110 if (header_process (hdr, "Location", header_strdup, &hs->newloc))
1112 /* Try getting last-modified. */
1113 if (!hs->remote_time)
1114 if (header_process (hdr, "Last-Modified", header_strdup,
1117 /* Try getting cookies. */
1119 if (header_process (hdr, "Set-Cookie", http_process_set_cookie, u))
1121 /* Try getting www-authentication. */
1122 if (!authenticate_h)
1123 if (header_process (hdr, "WWW-Authenticate", header_strdup,
1126 /* Check for accept-ranges header. If it contains the word
1127 `none', disable the ranges. */
1128 if (*dt & ACCEPTRANGES)
1131 if (header_process (hdr, "Accept-Ranges", http_process_none, &nonep))
1134 *dt &= ~ACCEPTRANGES;
1138 /* Try getting content-range. */
1139 if (contrange == -1)
1141 struct http_process_range_closure closure;
1142 if (header_process (hdr, "Content-Range", http_process_range, &closure))
1144 contrange = closure.first_byte_pos;
1148 /* Check for keep-alive related responses. */
1149 if (!inhibit_keep_alive)
1151 /* Check for the `Keep-Alive' header. */
1152 if (!http_keep_alive_1)
1154 if (header_process (hdr, "Keep-Alive", header_exists,
1155 &http_keep_alive_1))
1158 /* Check for `Connection: Keep-Alive'. */
1159 if (!http_keep_alive_2)
1161 if (header_process (hdr, "Connection", http_process_connection,
1162 &http_keep_alive_2))
1169 DEBUGP (("---response end---\n"));
1171 logputs (LOG_VERBOSE, "\n");
1174 && (http_keep_alive_1 || http_keep_alive_2))
1176 assert (inhibit_keep_alive == 0);
1180 /* The server has promised that it will not close the connection
1181 when we're done. This means that we can register it. */
1182 register_persistent (conn->host, conn->port, sock, using_ssl);
1184 if ((statcode == HTTP_STATUS_UNAUTHORIZED)
1187 /* Authorization is required. */
1191 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1192 might be more bytes in the body. */
1193 if (auth_tried_already)
1195 /* If we have tried it already, then there is not point
1198 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1199 xfree (authenticate_h);
1202 else if (!known_authentication_scheme_p (authenticate_h))
1204 xfree (authenticate_h);
1205 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1208 else if (BEGINS_WITH (authenticate_h, "Basic"))
1210 /* The authentication scheme is basic, the one we try by
1211 default, and it failed. There's no sense in trying
1217 auth_tried_already = 1;
1221 /* We do not need this anymore. */
1224 xfree (authenticate_h);
1225 authenticate_h = NULL;
1228 /* 20x responses are counted among successful by default. */
1229 if (H_20X (statcode))
1232 /* Return if redirected. */
1233 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1235 /* RFC2068 says that in case of the 300 (multiple choices)
1236 response, the server can output a preferred URL through
1237 `Location' header; otherwise, the request should be treated
1238 like GET. So, if the location is set, it will be a
1239 redirection; otherwise, just proceed normally. */
1240 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1244 logprintf (LOG_VERBOSE,
1245 _("Location: %s%s\n"),
1246 hs->newloc ? hs->newloc : _("unspecified"),
1247 hs->newloc ? _(" [following]") : "");
1248 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1249 might be more bytes in the body. */
1255 /* If content-type is not given, assume text/html. This is because
1256 of the multitude of broken CGI's that "forget" to generate the
1259 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1260 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1265 if (opt.html_extension && (*dt & TEXTHTML))
1266 /* -E / --html-extension / html_extension = on was specified, and this is a
1267 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1268 already the file's suffix, tack on ".html". */
1270 char* last_period_in_local_filename = strrchr(*hs->local_file, '.');
1272 if (last_period_in_local_filename == NULL
1273 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1274 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1276 size_t local_filename_len = strlen(*hs->local_file);
1278 *hs->local_file = xrealloc(*hs->local_file,
1279 local_filename_len + sizeof(".html"));
1280 strcpy(*hs->local_file + local_filename_len, ".html");
1282 *dt |= ADDED_HTML_EXTENSION;
1286 if (contrange == -1)
1288 /* We did not get a content-range header. This means that the
1289 server did not honor our `Range' request. Normally, this
1290 means we should reset hs->restval and continue normally. */
1292 /* However, if `-c' is used, we need to be a bit more careful:
1294 1. If `-c' is specified and the file already existed when
1295 Wget was started, it would be a bad idea for us to start
1296 downloading it from scratch, effectively truncating it. I
1297 believe this cannot happen unless `-c' was specified.
1299 2. If `-c' is used on a file that is already fully
1300 downloaded, we're requesting bytes after the end of file,
1301 which can result in server not honoring `Range'. If this is
1302 the case, `Content-Length' will be equal to the length of the
1304 if (opt.always_rest)
1306 /* Check for condition #2. */
1307 if (hs->restval > 0 /* restart was requested. */
1308 && contlen != -1 /* we got content-length. */
1309 && hs->restval >= contlen /* file fully downloaded
1313 logputs (LOG_VERBOSE, _("\
1314 \n The file is already fully retrieved; nothing to do.\n\n"));
1315 /* In case the caller inspects. */
1318 /* Mark as successfully retrieved. */
1321 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1322 might be more bytes in the body. */
1323 return RETRUNNEEDED;
1326 /* Check for condition #1. */
1327 if (hs->no_truncate)
1329 logprintf (LOG_NOTQUIET,
1332 Continued download failed on this file, which conflicts with `-c'.\n\
1333 Refusing to truncate existing file `%s'.\n\n"), *hs->local_file);
1335 CLOSE_INVALIDATE (sock);
1336 return CONTNOTSUPPORTED;
1344 else if (contrange != hs->restval ||
1345 (H_PARTIAL (statcode) && contrange == -1))
1347 /* This means the whole request was somehow misunderstood by the
1348 server. Bail out. */
1350 CLOSE_INVALIDATE (sock);
1357 contlen += contrange;
1359 contrange = -1; /* If conent-length was not sent,
1360 content-range will be ignored. */
1362 hs->contlen = contlen;
1366 if ((*dt & RETROKF) && !opt.server_response)
1368 /* No need to print this output if the body won't be
1369 downloaded at all, or if the original server response is
1371 logputs (LOG_VERBOSE, _("Length: "));
1374 logputs (LOG_VERBOSE, legible (contlen));
1375 if (contrange != -1)
1376 logprintf (LOG_VERBOSE, _(" (%s to go)"),
1377 legible (contlen - contrange));
1380 logputs (LOG_VERBOSE,
1381 opt.ignore_length ? _("ignored") : _("unspecified"));
1383 logprintf (LOG_VERBOSE, " [%s]\n", type);
1385 logputs (LOG_VERBOSE, "\n");
1389 type = NULL; /* We don't need it any more. */
1391 /* Return if we have no intention of further downloading. */
1392 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
1394 /* In case the caller cares to look... */
1398 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1399 might be more bytes in the body. */
1400 return RETRFINISHED;
1403 /* Open the local file. */
1406 mkalldirs (*hs->local_file);
1408 rotate_backups (*hs->local_file);
1409 fp = fopen (*hs->local_file, hs->restval ? "ab" : "wb");
1412 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1413 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1414 might be more bytes in the body. */
1420 extern int global_download_count;
1422 /* To ensure that repeated "from scratch" downloads work for -O
1423 files, we rewind the file pointer, unless restval is
1424 non-zero. (This works only when -O is used on regular files,
1425 but it's still a valuable feature.)
1427 However, this loses when more than one URL is specified on
1428 the command line the second rewinds eradicates the contents
1429 of the first download. Thus we disable the above trick for
1430 all the downloads except the very first one.
1432 #### A possible solution to this would be to remember the
1433 file position in the output document and to seek to that
1434 position, instead of rewinding.
1436 We don't truncate stdout, since that breaks
1437 "wget -O - [...] >> foo".
1439 if (!hs->restval && global_download_count == 0 && opt.dfp != stdout)
1441 /* This will silently fail for streams that don't correspond
1442 to regular files, but that's OK. */
1444 /* ftruncate is needed because opt.dfp is opened in append
1445 mode if opt.always_rest is set. */
1446 ftruncate (fileno (fp), 0);
1451 /* #### This confuses the code that checks for file size. There
1452 should be some overhead information. */
1453 if (opt.save_headers)
1454 fwrite (head, 1, strlen (head), fp);
1456 /* Get the contents of the document. */
1457 hs->res = fd_read_body (sock, fp, &hs->len, hs->restval,
1458 (contlen != -1 ? contlen : 0),
1459 keep_alive, &hs->dltime);
1462 CLOSE_FINISH (sock);
1464 CLOSE_INVALIDATE (sock);
1467 /* Close or flush the file. We have to be careful to check for
1468 error here. Checking the result of fwrite() is not enough --
1469 errors could go unnoticed! */
1472 flush_res = fclose (fp);
1474 flush_res = fflush (fp);
1475 if (flush_res == EOF)
1480 return RETRFINISHED;
1483 /* The genuine HTTP loop! This is the part where the retrieval is
1484 retried, and retried, and retried, and... */
1486 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1487 int *dt, struct url *proxy)
1490 int use_ts, got_head = 0; /* time-stamping info */
1491 char *filename_plus_orig_suffix;
1492 char *local_filename = NULL;
1493 char *tms, *locf, *tmrate;
1495 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1496 long local_size = 0; /* the size of the local file */
1497 size_t filename_len;
1498 struct http_stat hstat; /* HTTP status */
1502 /* This used to be done in main(), but it's a better idea to do it
1503 here so that we don't go through the hoops if we're just using
1507 if (!wget_cookie_jar)
1508 wget_cookie_jar = cookie_jar_new ();
1509 if (opt.cookies_input && !cookies_loaded_p)
1511 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
1512 cookies_loaded_p = 1;
1518 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
1519 has_wildcards_p because it would also warn on `?', and we know that
1520 shows up in CGI paths a *lot*. */
1521 if (strchr (u->url, '*'))
1522 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
1524 /* Determine the local filename. */
1525 if (local_file && *local_file)
1526 hstat.local_file = local_file;
1527 else if (local_file)
1529 *local_file = url_file_name (u);
1530 hstat.local_file = local_file;
1534 dummy = url_file_name (u);
1535 hstat.local_file = &dummy;
1538 if (!opt.output_document)
1539 locf = *hstat.local_file;
1541 locf = opt.output_document;
1543 hstat.referer = referer;
1545 filename_len = strlen (*hstat.local_file);
1546 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1548 if (opt.noclobber && file_exists_p (*hstat.local_file))
1550 /* If opt.noclobber is turned on and file already exists, do not
1551 retrieve the file */
1552 logprintf (LOG_VERBOSE, _("\
1553 File `%s' already there, will not retrieve.\n"), *hstat.local_file);
1554 /* If the file is there, we suppose it's retrieved OK. */
1557 /* #### Bogusness alert. */
1558 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1559 if (has_html_suffix_p (*hstat.local_file))
1567 if (opt.timestamping)
1569 int local_dot_orig_file_exists = 0;
1571 if (opt.backup_converted)
1572 /* If -K is specified, we'll act on the assumption that it was specified
1573 last time these files were downloaded as well, and instead of just
1574 comparing local file X against server file X, we'll compare local
1575 file X.orig (if extant, else X) against server file X. If -K
1576 _wasn't_ specified last time, or the server contains files called
1577 *.orig, -N will be back to not operating correctly with -k. */
1579 /* Would a single s[n]printf() call be faster? --dan
1581 Definitely not. sprintf() is horribly slow. It's a
1582 different question whether the difference between the two
1583 affects a program. Usually I'd say "no", but at one
1584 point I profiled Wget, and found that a measurable and
1585 non-negligible amount of time was lost calling sprintf()
1586 in url.c. Replacing sprintf with inline calls to
1587 strcpy() and long_to_string() made a difference.
1589 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
1590 memcpy (filename_plus_orig_suffix + filename_len,
1591 ".orig", sizeof (".orig"));
1593 /* Try to stat() the .orig file. */
1594 if (stat (filename_plus_orig_suffix, &st) == 0)
1596 local_dot_orig_file_exists = 1;
1597 local_filename = filename_plus_orig_suffix;
1601 if (!local_dot_orig_file_exists)
1602 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1603 if (stat (*hstat.local_file, &st) == 0)
1604 local_filename = *hstat.local_file;
1606 if (local_filename != NULL)
1607 /* There was a local file, so we'll check later to see if the version
1608 the server has is the same version we already have, allowing us to
1614 /* Modification time granularity is 2 seconds for Windows, so
1615 increase local time by 1 second for later comparison. */
1618 local_size = st.st_size;
1622 /* Reset the counter. */
1624 *dt = 0 | ACCEPTRANGES;
1628 /* Increment the pass counter. */
1630 sleep_between_retrievals (count);
1631 /* Get the current time string. */
1632 tms = time_str (NULL);
1633 /* Print fetch message, if opt.verbose. */
1636 char *hurl = url_string (u, 1);
1640 sprintf (tmp, _("(try:%2d)"), count);
1641 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1642 tms, hurl, tmp, locf);
1644 ws_changetitle (hurl, 1);
1649 /* Default document type is empty. However, if spider mode is
1650 on or time-stamping is employed, HEAD_ONLY commands is
1651 encoded within *dt. */
1652 if (opt.spider || (use_ts && !got_head))
1656 /* Assume no restarting. */
1658 /* Decide whether or not to restart. */
1659 if (((count > 1 && (*dt & ACCEPTRANGES)) || opt.always_rest)
1660 /* #### this calls access() and then stat(); could be optimized. */
1661 && file_exists_p (locf))
1662 if (stat (locf, &st) == 0 && S_ISREG (st.st_mode))
1663 hstat.restval = st.st_size;
1665 /* In `-c' is used and the file is existing and non-empty,
1666 refuse to truncate it if the server doesn't support continued
1668 hstat.no_truncate = 0;
1669 if (opt.always_rest && hstat.restval)
1670 hstat.no_truncate = 1;
1672 /* Decide whether to send the no-cache directive. We send it in
1674 a) we're using a proxy, and we're past our first retrieval.
1675 Some proxies are notorious for caching incomplete data, so
1676 we require a fresh get.
1677 b) caching is explicitly inhibited. */
1678 if ((proxy && count > 1) /* a */
1679 || !opt.allow_cache /* b */
1681 *dt |= SEND_NOCACHE;
1683 *dt &= ~SEND_NOCACHE;
1685 /* Try fetching the document, or at least its head. */
1686 err = gethttp (u, &hstat, dt, proxy);
1688 /* It's unfortunate that wget determines the local filename before finding
1689 out the Content-Type of the file. Barring a major restructuring of the
1690 code, we need to re-set locf here, since gethttp() may have xrealloc()d
1691 *hstat.local_file to tack on ".html". */
1692 if (!opt.output_document)
1693 locf = *hstat.local_file;
1695 locf = opt.output_document;
1698 tms = time_str (NULL);
1699 /* Get the new location (with or without the redirection). */
1701 *newloc = xstrdup (hstat.newloc);
1704 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
1705 case CONERROR: case READERR: case WRITEFAILED:
1707 /* Non-fatal errors continue executing the loop, which will
1708 bring them to "while" statement at the end, to judge
1709 whether the number of tries was exceeded. */
1710 free_hstat (&hstat);
1711 printwhat (count, opt.ntry);
1714 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
1715 case SSLERRCTXCREATE: case CONTNOTSUPPORTED:
1716 /* Fatal errors just return from the function. */
1717 free_hstat (&hstat);
1721 case FWRITEERR: case FOPENERR:
1722 /* Another fatal error. */
1723 logputs (LOG_VERBOSE, "\n");
1724 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
1725 *hstat.local_file, strerror (errno));
1726 free_hstat (&hstat);
1731 /* Another fatal error. */
1732 logputs (LOG_VERBOSE, "\n");
1733 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
1734 free_hstat (&hstat);
1739 /* Return the new location to the caller. */
1742 logprintf (LOG_NOTQUIET,
1743 _("ERROR: Redirection (%d) without location.\n"),
1745 free_hstat (&hstat);
1749 free_hstat (&hstat);
1754 /* The file was already fully retrieved. */
1755 free_hstat (&hstat);
1760 /* Deal with you later. */
1763 /* All possibilities should have been exhausted. */
1766 if (!(*dt & RETROKF))
1770 /* #### Ugly ugly ugly! */
1771 char *hurl = url_string (u, 1);
1772 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
1775 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
1776 tms, hstat.statcode, hstat.error);
1777 logputs (LOG_VERBOSE, "\n");
1778 free_hstat (&hstat);
1783 /* Did we get the time-stamp? */
1786 if (opt.timestamping && !hstat.remote_time)
1788 logputs (LOG_NOTQUIET, _("\
1789 Last-modified header missing -- time-stamps turned off.\n"));
1791 else if (hstat.remote_time)
1793 /* Convert the date-string into struct tm. */
1794 tmr = http_atotm (hstat.remote_time);
1795 if (tmr == (time_t) (-1))
1796 logputs (LOG_VERBOSE, _("\
1797 Last-modified header invalid -- time-stamp ignored.\n"));
1801 /* The time-stamping section. */
1806 use_ts = 0; /* no more time-stamping */
1807 count = 0; /* the retrieve count for HEAD is
1809 if (hstat.remote_time && tmr != (time_t) (-1))
1811 /* Now time-stamping can be used validly. Time-stamping
1812 means that if the sizes of the local and remote file
1813 match, and local file is newer than the remote file,
1814 it will not be retrieved. Otherwise, the normal
1815 download procedure is resumed. */
1817 (hstat.contlen == -1 || local_size == hstat.contlen))
1819 logprintf (LOG_VERBOSE, _("\
1820 Server file no newer than local file `%s' -- not retrieving.\n\n"),
1822 free_hstat (&hstat);
1826 else if (tml >= tmr)
1827 logprintf (LOG_VERBOSE, _("\
1828 The sizes do not match (local %ld) -- retrieving.\n"), local_size);
1830 logputs (LOG_VERBOSE,
1831 _("Remote file is newer, retrieving.\n"));
1833 free_hstat (&hstat);
1836 if ((tmr != (time_t) (-1))
1838 && ((hstat.len == hstat.contlen) ||
1839 ((hstat.res == 0) &&
1840 ((hstat.contlen == -1) ||
1841 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
1843 /* #### This code repeats in http.c and ftp.c. Move it to a
1845 const char *fl = NULL;
1846 if (opt.output_document)
1848 if (opt.od_known_regular)
1849 fl = opt.output_document;
1852 fl = *hstat.local_file;
1856 /* End of time-stamping section. */
1860 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode, hstat.error);
1865 tmrate = retr_rate (hstat.len - hstat.restval, hstat.dltime, 0);
1867 if (hstat.len == hstat.contlen)
1871 logprintf (LOG_VERBOSE,
1872 _("%s (%s) - `%s' saved [%ld/%ld]\n\n"),
1873 tms, tmrate, locf, hstat.len, hstat.contlen);
1874 logprintf (LOG_NONVERBOSE,
1875 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1876 tms, u->url, hstat.len, hstat.contlen, locf, count);
1879 total_downloaded_bytes += hstat.len;
1881 /* Remember that we downloaded the file for later ".orig" code. */
1882 if (*dt & ADDED_HTML_EXTENSION)
1883 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1885 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1887 free_hstat (&hstat);
1891 else if (hstat.res == 0) /* No read error */
1893 if (hstat.contlen == -1) /* We don't know how much we were supposed
1894 to get, so assume we succeeded. */
1898 logprintf (LOG_VERBOSE,
1899 _("%s (%s) - `%s' saved [%ld]\n\n"),
1900 tms, tmrate, locf, hstat.len);
1901 logprintf (LOG_NONVERBOSE,
1902 "%s URL:%s [%ld] -> \"%s\" [%d]\n",
1903 tms, u->url, hstat.len, locf, count);
1906 total_downloaded_bytes += hstat.len;
1908 /* Remember that we downloaded the file for later ".orig" code. */
1909 if (*dt & ADDED_HTML_EXTENSION)
1910 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1912 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1914 free_hstat (&hstat);
1918 else if (hstat.len < hstat.contlen) /* meaning we lost the
1919 connection too soon */
1921 logprintf (LOG_VERBOSE,
1922 _("%s (%s) - Connection closed at byte %ld. "),
1923 tms, tmrate, hstat.len);
1924 printwhat (count, opt.ntry);
1925 free_hstat (&hstat);
1928 else if (!opt.kill_longer) /* meaning we got more than expected */
1930 logprintf (LOG_VERBOSE,
1931 _("%s (%s) - `%s' saved [%ld/%ld])\n\n"),
1932 tms, tmrate, locf, hstat.len, hstat.contlen);
1933 logprintf (LOG_NONVERBOSE,
1934 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1935 tms, u->url, hstat.len, hstat.contlen, locf, count);
1937 total_downloaded_bytes += hstat.len;
1939 /* Remember that we downloaded the file for later ".orig" code. */
1940 if (*dt & ADDED_HTML_EXTENSION)
1941 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1943 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1945 free_hstat (&hstat);
1949 else /* the same, but not accepted */
1951 logprintf (LOG_VERBOSE,
1952 _("%s (%s) - Connection closed at byte %ld/%ld. "),
1953 tms, tmrate, hstat.len, hstat.contlen);
1954 printwhat (count, opt.ntry);
1955 free_hstat (&hstat);
1959 else /* now hstat.res can only be -1 */
1961 if (hstat.contlen == -1)
1963 logprintf (LOG_VERBOSE,
1964 _("%s (%s) - Read error at byte %ld (%s)."),
1965 tms, tmrate, hstat.len, strerror (errno));
1966 printwhat (count, opt.ntry);
1967 free_hstat (&hstat);
1970 else /* hstat.res == -1 and contlen is given */
1972 logprintf (LOG_VERBOSE,
1973 _("%s (%s) - Read error at byte %ld/%ld (%s). "),
1974 tms, tmrate, hstat.len, hstat.contlen,
1976 printwhat (count, opt.ntry);
1977 free_hstat (&hstat);
1984 while (!opt.ntry || (count < opt.ntry));
1988 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
1989 than local timezone.
1991 mktime is similar but assumes struct tm, also known as the
1992 "broken-down" form of time, is in local time zone. mktime_from_utc
1993 uses mktime to make the conversion understanding that an offset
1994 will be introduced by the local time assumption.
1996 mktime_from_utc then measures the introduced offset by applying
1997 gmtime to the initial result and applying mktime to the resulting
1998 "broken-down" form. The difference between the two mktime results
1999 is the measured offset which is then subtracted from the initial
2000 mktime result to yield a calendar time which is the value returned.
2002 tm_isdst in struct tm is set to 0 to force mktime to introduce a
2003 consistent offset (the non DST offset) since tm and tm+o might be
2004 on opposite sides of a DST change.
2006 Some implementations of mktime return -1 for the nonexistent
2007 localtime hour at the beginning of DST. In this event, use
2008 mktime(tm - 1hr) + 3600.
2012 gmtime(t+o) --> tm+o
2013 mktime(tm+o) --> t+2o
2014 t+o - (t+2o - t+o) = t
2016 Note that glibc contains a function of the same purpose named
2017 `timegm' (reverse of gmtime). But obviously, it is not universally
2018 available, and unfortunately it is not straightforwardly
2019 extractable for use here. Perhaps configure should detect timegm
2020 and use it where available.
2022 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
2023 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO.
2024 Further improved by Roger with assistance from Edward J. Sabol
2025 based on input by Jamie Zawinski. */
2028 mktime_from_utc (struct tm *t)
2039 return -1; /* can't deal with output from strptime */
2050 return -1; /* can't deal with output from gmtime */
2053 return (tl - (tb - tl));
2056 /* Check whether the result of strptime() indicates success.
2057 strptime() returns the pointer to how far it got to in the string.
2058 The processing has been successful if the string is at `GMT' or
2059 `+X', or at the end of the string.
2061 In extended regexp parlance, the function returns 1 if P matches
2062 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2063 can return) is considered a failure and 0 is returned. */
2065 check_end (const char *p)
2069 while (ISSPACE (*p))
2072 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2073 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2079 /* Convert the textual specification of time in TIME_STRING to the
2080 number of seconds since the Epoch.
2082 TIME_STRING can be in any of the three formats RFC2068 allows the
2083 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date.
2084 Timezones are ignored, and should be GMT.
2086 Return the computed time_t representation, or -1 if the conversion
2089 This function uses strptime with various string formats for parsing
2090 TIME_STRING. This results in a parser that is not as lenient in
2091 interpreting TIME_STRING as I would like it to be. Being based on
2092 strptime, it always allows shortened months, one-digit days, etc.,
2093 but due to the multitude of formats in which time can be
2094 represented, an ideal HTTP time parser would be even more
2095 forgiving. It should completely ignore things like week days and
2096 concentrate only on the various forms of representing years,
2097 months, days, hours, minutes, and seconds. For example, it would
2098 be nice if it accepted ISO 8601 out of the box.
2100 I've investigated free and PD code for this purpose, but none was
2101 usable. getdate was big and unwieldy, and had potential copyright
2102 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2103 distributed with phttpd, is excellent, but we cannot use it because
2104 it is not assigned to the FSF. So I stuck it with strptime. */
2107 http_atotm (const char *time_string)
2109 /* NOTE: Solaris strptime man page claims that %n and %t match white
2110 space, but that's not universally available. Instead, we simply
2111 use ` ' to mean "skip all WS", which works under all strptime
2112 implementations I've tested. */
2114 static const char *time_formats[] = {
2115 "%a, %d %b %Y %T", /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
2116 "%A, %d-%b-%y %T", /* RFC850: Thursday, 29-Jan-98 22:12:57 */
2117 "%a, %d-%b-%Y %T", /* pseudo-RFC850: Thu, 29-Jan-1998 22:12:57
2118 (google.com uses this for their cookies.) */
2119 "%a %b %d %T %Y" /* asctime: Thu Jan 29 22:12:57 1998 */
2125 /* According to Roger Beeman, we need to initialize tm_isdst, since
2126 strptime won't do it. */
2129 /* Note that under foreign locales Solaris strptime() fails to
2130 recognize English dates, which renders this function useless. We
2131 solve this by being careful not to affect LC_TIME when
2132 initializing locale.
2134 Another solution would be to temporarily set locale to C, invoke
2135 strptime(), and restore it back. This is slow and dirty,
2136 however, and locale support other than LC_MESSAGES can mess other
2137 things, so I rather chose to stick with just setting LC_MESSAGES.
2139 GNU strptime does not have this problem because it recognizes
2140 both international and local dates. */
2142 for (i = 0; i < countof (time_formats); i++)
2143 if (check_end (strptime (time_string, time_formats[i], &t)))
2144 return mktime_from_utc (&t);
2146 /* All formats have failed. */
2150 /* Authorization support: We support two authorization schemes:
2152 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2154 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2155 consisting of answering to the server's challenge with the proper
2158 /* How many bytes it will take to store LEN bytes in base64. */
2159 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
2161 /* Encode the string S of length LENGTH to base64 format and place it
2162 to STORE. STORE will be 0-terminated, and must point to a writable
2163 buffer of at least 1+BASE64_LENGTH(length) bytes. */
2165 base64_encode (const char *s, char *store, int length)
2167 /* Conversion table. */
2168 static char tbl[64] = {
2169 'A','B','C','D','E','F','G','H',
2170 'I','J','K','L','M','N','O','P',
2171 'Q','R','S','T','U','V','W','X',
2172 'Y','Z','a','b','c','d','e','f',
2173 'g','h','i','j','k','l','m','n',
2174 'o','p','q','r','s','t','u','v',
2175 'w','x','y','z','0','1','2','3',
2176 '4','5','6','7','8','9','+','/'
2179 unsigned char *p = (unsigned char *)store;
2181 /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
2182 for (i = 0; i < length; i += 3)
2184 *p++ = tbl[s[0] >> 2];
2185 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
2186 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
2187 *p++ = tbl[s[2] & 0x3f];
2190 /* Pad the result if necessary... */
2191 if (i == length + 1)
2193 else if (i == length + 2)
2194 *(p - 1) = *(p - 2) = '=';
2195 /* ...and zero-terminate it. */
2199 /* Create the authentication header contents for the `Basic' scheme.
2200 This is done by encoding the string `USER:PASS' in base64 and
2201 prepending `HEADER: Basic ' to it. */
2203 basic_authentication_encode (const char *user, const char *passwd,
2206 char *t1, *t2, *res;
2207 int len1 = strlen (user) + 1 + strlen (passwd);
2208 int len2 = BASE64_LENGTH (len1);
2210 t1 = (char *)alloca (len1 + 1);
2211 sprintf (t1, "%s:%s", user, passwd);
2212 t2 = (char *)alloca (1 + len2);
2213 base64_encode (t1, t2, len1);
2214 res = (char *)xmalloc (len2 + 11 + strlen (header));
2215 sprintf (res, "%s: Basic %s\r\n", header, t2);
2221 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2222 of a field in such a header. If the field is the one specified by
2223 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2224 digest authorization code), extract its value in the (char*)
2225 variable pointed by RET. Returns negative on a malformed header,
2226 or number of bytes that have been parsed by this call. */
2228 extract_header_attr (const char *au, const char *attr_name, char **ret)
2230 const char *cp, *ep;
2234 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2236 cp += strlen (attr_name);
2239 cp += skip_lws (cp);
2244 cp += skip_lws (cp);
2249 for (ep = cp; *ep && *ep != '\"'; ep++)
2254 *ret = strdupdelim (cp, ep);
2261 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2262 an array of 16 bytes containing the hash keys, and BUF should be a
2263 buffer of 33 writable characters (32 for hex digits plus one for
2264 zero termination). */
2266 dump_hash (unsigned char *buf, const unsigned char *hash)
2270 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2272 *buf++ = XNUM_TO_digit (*hash >> 4);
2273 *buf++ = XNUM_TO_digit (*hash & 0xf);
2278 /* Take the line apart to find the challenge, and compose a digest
2279 authorization header. See RFC2069 section 2.1.2. */
2281 digest_authentication_encode (const char *au, const char *user,
2282 const char *passwd, const char *method,
2285 static char *realm, *opaque, *nonce;
2290 { "realm", &realm },
2291 { "opaque", &opaque },
2296 realm = opaque = nonce = NULL;
2298 au += 6; /* skip over `Digest' */
2303 au += skip_lws (au);
2304 for (i = 0; i < countof (options); i++)
2306 int skip = extract_header_attr (au, options[i].name,
2307 options[i].variable);
2311 xfree_null (opaque);
2321 if (i == countof (options))
2323 while (*au && *au != '=')
2327 au += skip_lws (au);
2331 while (*au && *au != '\"')
2338 while (*au && *au != ',')
2343 if (!realm || !nonce || !user || !passwd || !path || !method)
2346 xfree_null (opaque);
2351 /* Calculate the digest value. */
2353 ALLOCA_MD5_CONTEXT (ctx);
2354 unsigned char hash[MD5_HASHLEN];
2355 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2356 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
2358 /* A1BUF = H(user ":" realm ":" password) */
2360 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2361 gen_md5_update ((unsigned char *)":", 1, ctx);
2362 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2363 gen_md5_update ((unsigned char *)":", 1, ctx);
2364 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2365 gen_md5_finish (ctx, hash);
2366 dump_hash (a1buf, hash);
2368 /* A2BUF = H(method ":" path) */
2370 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2371 gen_md5_update ((unsigned char *)":", 1, ctx);
2372 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2373 gen_md5_finish (ctx, hash);
2374 dump_hash (a2buf, hash);
2376 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2378 gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
2379 gen_md5_update ((unsigned char *)":", 1, ctx);
2380 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2381 gen_md5_update ((unsigned char *)":", 1, ctx);
2382 gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
2383 gen_md5_finish (ctx, hash);
2384 dump_hash (response_digest, hash);
2386 res = (char*) xmalloc (strlen (user)
2391 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2392 + (opaque ? strlen (opaque) : 0)
2394 sprintf (res, "Authorization: Digest \
2395 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2396 user, realm, nonce, path, response_digest);
2399 char *p = res + strlen (res);
2400 strcat (p, ", opaque=\"");
2404 strcat (res, "\r\n");
2408 #endif /* USE_DIGEST */
2411 #define BEGINS_WITH(line, string_constant) \
2412 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
2413 && (ISSPACE (line[sizeof (string_constant) - 1]) \
2414 || !line[sizeof (string_constant) - 1]))
2417 known_authentication_scheme_p (const char *au)
2419 return BEGINS_WITH (au, "Basic")
2420 || BEGINS_WITH (au, "Digest")
2421 || BEGINS_WITH (au, "NTLM");
2426 /* Create the HTTP authorization request header. When the
2427 `WWW-Authenticate' response header is seen, according to the
2428 authorization scheme specified in that header (`Basic' and `Digest'
2429 are supported by the current implementation), produce an
2430 appropriate HTTP authorization request header. */
2432 create_authorization_line (const char *au, const char *user,
2433 const char *passwd, const char *method,
2436 char *wwwauth = NULL;
2438 if (!strncasecmp (au, "Basic", 5))
2439 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2440 if (!strncasecmp (au, "NTLM", 4))
2441 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2443 else if (!strncasecmp (au, "Digest", 6))
2444 wwwauth = digest_authentication_encode (au, user, passwd, method, path);
2445 #endif /* USE_DIGEST */