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>
70 # include "gen_sslfunc.h"
78 extern char *version_string;
79 extern LARGE_INT total_downloaded_bytes;
82 static int cookies_loaded_p;
83 struct cookie_jar *wget_cookie_jar;
85 #define TEXTHTML_S "text/html"
86 #define TEXTXHTML_S "application/xhtml+xml"
87 #define HTTP_ACCEPT "*/*"
89 /* Some status code validation macros: */
90 #define H_20X(x) (((x) >= 200) && ((x) < 300))
91 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
92 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
93 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
94 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
96 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
98 #define HTTP_STATUS_OK 200
99 #define HTTP_STATUS_CREATED 201
100 #define HTTP_STATUS_ACCEPTED 202
101 #define HTTP_STATUS_NO_CONTENT 204
102 #define HTTP_STATUS_PARTIAL_CONTENTS 206
104 /* Redirection 3xx. */
105 #define HTTP_STATUS_MULTIPLE_CHOICES 300
106 #define HTTP_STATUS_MOVED_PERMANENTLY 301
107 #define HTTP_STATUS_MOVED_TEMPORARILY 302
108 #define HTTP_STATUS_NOT_MODIFIED 304
109 #define HTTP_STATUS_TEMPORARY_REDIRECT 307
111 /* Client error 4xx. */
112 #define HTTP_STATUS_BAD_REQUEST 400
113 #define HTTP_STATUS_UNAUTHORIZED 401
114 #define HTTP_STATUS_FORBIDDEN 403
115 #define HTTP_STATUS_NOT_FOUND 404
117 /* Server errors 5xx. */
118 #define HTTP_STATUS_INTERNAL 500
119 #define HTTP_STATUS_NOT_IMPLEMENTED 501
120 #define HTTP_STATUS_BAD_GATEWAY 502
121 #define HTTP_STATUS_UNAVAILABLE 503
124 /* Parse the HTTP status line, which is of format:
126 HTTP-Version SP Status-Code SP Reason-Phrase
128 The function returns the status-code, or -1 if the status line is
129 malformed. The pointer to reason-phrase is returned in RP. */
131 parse_http_status_line (const char *line, const char **reason_phrase_ptr)
133 /* (the variables must not be named `major' and `minor', because
134 that breaks compilation with SunOS4 cc.) */
135 int mjr, mnr, statcode;
138 *reason_phrase_ptr = NULL;
140 /* The standard format of HTTP-Version is: `HTTP/X.Y', where X is
141 major version, and Y is minor version. */
142 if (strncmp (line, "HTTP/", 5) != 0)
146 /* Calculate major HTTP version. */
148 for (mjr = 0; ISDIGIT (*line); line++)
149 mjr = 10 * mjr + (*line - '0');
150 if (*line != '.' || p == line)
154 /* Calculate minor HTTP version. */
156 for (mnr = 0; ISDIGIT (*line); line++)
157 mnr = 10 * mnr + (*line - '0');
158 if (*line != ' ' || p == line)
160 /* Wget will accept only 1.0 and higher HTTP-versions. The value of
161 minor version can be safely ignored. */
166 /* Calculate status code. */
167 if (!(ISDIGIT (*line) && ISDIGIT (line[1]) && ISDIGIT (line[2])))
169 statcode = 100 * (*line - '0') + 10 * (line[1] - '0') + (line[2] - '0');
171 /* Set up the reason phrase pointer. */
173 /* RFC2068 requires SPC here, but we allow the string to finish
174 here, in case no reason-phrase is present. */
178 *reason_phrase_ptr = line;
183 *reason_phrase_ptr = line + 1;
188 #define WMIN(x, y) ((x) > (y) ? (y) : (x))
190 /* Send the contents of FILE_NAME to SOCK/SSL. Make sure that exactly
191 PROMISED_SIZE bytes are sent over the wire -- if the file is
192 longer, read only that much; if the file is shorter, report an error. */
195 post_file (int sock, const char *file_name, long promised_size)
197 static char chunk[8192];
202 DEBUGP (("[writing POST file %s ... ", file_name));
204 fp = fopen (file_name, "rb");
207 while (!feof (fp) && written < promised_size)
210 int length = fread (chunk, 1, sizeof (chunk), fp);
213 towrite = WMIN (promised_size - written, length);
214 write_error = xwrite (sock, chunk, towrite, -1);
224 /* If we've written less than was promised, report a (probably
225 nonsensical) error rather than break the promise. */
226 if (written < promised_size)
232 assert (written == promised_size);
233 DEBUGP (("done]\n"));
237 /* Functions to be used as arguments to header_process(): */
239 struct http_process_range_closure {
245 /* Parse the `Content-Range' header and extract the information it
246 contains. Returns 1 if successful, -1 otherwise. */
248 http_process_range (const char *hdr, void *arg)
250 struct http_process_range_closure *closure
251 = (struct http_process_range_closure *)arg;
254 /* Certain versions of Nutscape proxy server send out
255 `Content-Length' without "bytes" specifier, which is a breach of
256 RFC2068 (as well as the HTTP/1.1 draft which was current at the
257 time). But hell, I must support it... */
258 if (!strncasecmp (hdr, "bytes", 5))
261 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
265 hdr += skip_lws (hdr);
271 for (num = 0; ISDIGIT (*hdr); hdr++)
272 num = 10 * num + (*hdr - '0');
273 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
275 closure->first_byte_pos = num;
277 for (num = 0; ISDIGIT (*hdr); hdr++)
278 num = 10 * num + (*hdr - '0');
279 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
281 closure->last_byte_pos = num;
283 for (num = 0; ISDIGIT (*hdr); hdr++)
284 num = 10 * num + (*hdr - '0');
285 closure->entity_length = num;
289 /* Place 1 to ARG if the HDR contains the word "none", 0 otherwise.
290 Used for `Accept-Ranges'. */
292 http_process_none (const char *hdr, void *arg)
294 int *where = (int *)arg;
296 if (strstr (hdr, "none"))
303 /* Place the malloc-ed copy of HDR hdr, to the first `;' to ARG. */
305 http_process_type (const char *hdr, void *arg)
307 char **result = (char **)arg;
308 /* Locate P on `;' or the terminating zero, whichever comes first. */
309 const char *p = strchr (hdr, ';');
311 p = hdr + strlen (hdr);
312 while (p > hdr && ISSPACE (*(p - 1)))
314 *result = strdupdelim (hdr, p);
318 /* Check whether the `Connection' header is set to "keep-alive". */
320 http_process_connection (const char *hdr, void *arg)
322 int *flag = (int *)arg;
323 if (!strcasecmp (hdr, "Keep-Alive"))
328 /* Commit the cookie to the cookie jar. */
331 http_process_set_cookie (const char *hdr, void *arg)
333 struct url *u = (struct url *)arg;
335 /* The jar should have been created by now. */
336 assert (wget_cookie_jar != NULL);
338 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port, u->path, hdr);
343 /* Persistent connections. Currently, we cache the most recently used
344 connection as persistent, provided that the HTTP server agrees to
345 make it such. The persistence data is stored in the variables
346 below. Ideally, it should be possible to cache an arbitrary fixed
347 number of these connections. */
349 /* Whether a persistent connection is active. */
350 static int pconn_active;
353 /* The socket of the connection. */
356 /* Host and port of the currently active persistent connection. */
360 /* Whether a ssl handshake has occoured on this connection. */
364 /* Mark the persistent connection as invalid and free the resources it
365 uses. This is used by the CLOSE_* macros after they forcefully
366 close a registered persistent connection. */
369 invalidate_persistent (void)
371 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
373 xclose (pconn.socket);
378 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
379 persistent. This will enable someone to use the same connection
380 later. In the context of HTTP, this must be called only AFTER the
381 response has been received and the server has promised that the
382 connection will remain alive.
384 If a previous connection was persistent, it is closed. */
387 register_persistent (const char *host, int port, int fd, int ssl)
391 if (pconn.socket == fd)
393 /* The connection FD is already registered. */
398 /* The old persistent connection is still active; close it
399 first. This situation arises whenever a persistent
400 connection exists, but we then connect to a different
401 host, and try to register a persistent connection to that
403 invalidate_persistent ();
409 pconn.host = xstrdup (host);
413 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
416 /* Return non-zero if a persistent connection is available for
417 connecting to HOST:PORT. */
420 persistent_available_p (const char *host, int port, int ssl,
421 int *host_lookup_failed)
423 /* First, check whether a persistent connection is active at all. */
427 /* If we want SSL and the last connection wasn't or vice versa,
428 don't use it. Checking for host and port is not enough because
429 HTTP and HTTPS can apparently coexist on the same port. */
430 if (ssl != pconn.ssl)
433 /* If we're not connecting to the same port, we're not interested. */
434 if (port != pconn.port)
437 /* If the host is the same, we're in business. If not, there is
438 still hope -- read below. */
439 if (0 != strcasecmp (host, pconn.host))
441 /* If pconn.socket is already talking to HOST, we needn't
442 reconnect. This happens often when both sites are virtual
443 hosts distinguished only by name and served by the same
444 network interface, and hence the same web server (possibly
445 set up by the ISP and serving many different web sites).
446 This admittedly non-standard optimization does not contradict
447 HTTP and works well with popular server software. */
451 struct address_list *al;
454 /* Don't try to talk to two different SSL sites over the same
455 secure connection! (Besides, it's not clear if name-based
456 virtual hosting is even possible with SSL.) */
459 /* If pconn.socket's peer is one of the IP addresses HOST
460 resolves to, pconn.socket is for all intents and purposes
461 already talking to HOST. */
463 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
465 /* Can't get the peer's address -- something must be very
466 wrong with the connection. */
467 invalidate_persistent ();
470 al = lookup_host (host, 0);
473 *host_lookup_failed = 1;
477 found = address_list_find (al, &ip);
478 address_list_release (al);
483 /* The persistent connection's peer address was found among the
484 addresses HOST resolved to; therefore, pconn.sock is in fact
485 already talking to HOST -- no need to reconnect. */
488 /* Finally, check whether the connection is still open. This is
489 important because most server implement a liberal (short) timeout
490 on persistent connections. Wget can of course always reconnect
491 if the connection doesn't work out, but it's nicer to know in
492 advance. This test is a logical followup of the first test, but
493 is "expensive" and therefore placed at the end of the list. */
495 if (!test_socket_open (pconn.socket))
497 /* Oops, the socket is no longer open. Now that we know that,
498 let's invalidate the persistent connection before returning
500 invalidate_persistent ();
507 /* The idea behind these two CLOSE macros is to distinguish between
508 two cases: one when the job we've been doing is finished, and we
509 want to close the connection and leave, and two when something is
510 seriously wrong and we're closing the connection as part of
513 In case of keep_alive, CLOSE_FINISH should leave the connection
514 open, while CLOSE_INVALIDATE should still close it.
516 Note that the semantics of the flag `keep_alive' is "this
517 connection *will* be reused (the server has promised not to close
518 the connection once we're done)", while the semantics of
519 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
520 active, registered connection". */
522 #define CLOSE_FINISH(fd) do { \
525 if (pconn_active && (fd) == pconn.socket) \
526 invalidate_persistent (); \
532 #define CLOSE_INVALIDATE(fd) do { \
533 if (pconn_active && (fd) == pconn.socket) \
534 invalidate_persistent (); \
541 long len; /* received length */
542 long contlen; /* expected length */
543 long restval; /* the restart value */
544 int res; /* the result of last read */
545 char *newloc; /* new location (redirection) */
546 char *remote_time; /* remote time-stamp string */
547 char *error; /* textual HTTP error */
548 int statcode; /* status code */
549 double dltime; /* time of the download in msecs */
550 int no_truncate; /* whether truncating the file is
552 const char *referer; /* value of the referer header. */
553 char **local_file; /* local file. */
557 free_hstat (struct http_stat *hs)
559 xfree_null (hs->newloc);
560 xfree_null (hs->remote_time);
561 xfree_null (hs->error);
563 /* Guard against being called twice. */
565 hs->remote_time = NULL;
569 static char *create_authorization_line PARAMS ((const char *, const char *,
570 const char *, const char *,
572 static char *basic_authentication_encode PARAMS ((const char *, const char *,
574 static int known_authentication_scheme_p PARAMS ((const char *));
576 time_t http_atotm PARAMS ((const char *));
578 #define BEGINS_WITH(line, string_constant) \
579 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
580 && (ISSPACE (line[sizeof (string_constant) - 1]) \
581 || !line[sizeof (string_constant) - 1]))
583 /* Retrieve a document through HTTP protocol. It recognizes status
584 code, and correctly handles redirections. It closes the network
585 socket. If it receives an error from the functions below it, it
586 will print it if there is enough information to do so (almost
587 always), returning the error to the caller (i.e. http_loop).
589 Various HTTP parameters are stored to hs. Although it parses the
590 response code correctly, it is not used in a sane way. The caller
593 If PROXY is non-NULL, the connection will be made to the proxy
594 server, and u->url will be requested. */
596 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
598 char *request, *type, *command, *full_path;
600 char *pragma_h, *referer, *useragent, *range, *wwwauth;
601 char *authenticate_h;
605 char *request_keep_alive;
606 int sock, hcount, all_length, statcode;
608 long contlen, contrange;
611 int auth_tried_already;
614 char *cookies = NULL;
616 /* Whether this connection will be kept alive after the HTTP request
620 /* Flags that detect the two ways of specifying HTTP keep-alive
622 int http_keep_alive_1, http_keep_alive_2;
624 /* Whether keep-alive should be inhibited. */
625 int inhibit_keep_alive;
627 /* Whether we need to print the host header with braces around host,
628 e.g. "Host: [3ffe:8100:200:2::2]:1234" instead of the usual
629 "Host: symbolic-name:1234". */
630 int squares_around_host = 0;
632 /* Headers sent when using POST. */
633 char *post_content_type, *post_content_length;
634 long post_data_size = 0;
636 int host_lookup_failed;
639 /* Initialize the SSL context. After the first run, this is a
643 case SSLERRCTXCREATE:
645 logprintf (LOG_NOTQUIET, _("Failed to set up an SSL context\n"));
646 return SSLERRCTXCREATE;
648 /* try without certfile */
649 logprintf (LOG_NOTQUIET,
650 _("Failed to load certificates from %s\n"),
652 logprintf (LOG_NOTQUIET,
653 _("Trying without the specified certificate\n"));
656 logprintf (LOG_NOTQUIET,
657 _("Failed to get certificate key from %s\n"),
659 logprintf (LOG_NOTQUIET,
660 _("Trying without the specified certificate\n"));
665 #endif /* HAVE_SSL */
667 if (!(*dt & HEAD_ONLY))
668 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
669 know the local filename so we can save to it. */
670 assert (*hs->local_file != NULL);
673 auth_tried_already = 0;
675 inhibit_keep_alive = !opt.http_keep_alive || proxy != NULL;
678 /* We need to come back here when the initial attempt to retrieve
679 without authorization header fails. (Expected to happen at least
680 for the Digest authorization scheme.) */
683 http_keep_alive_1 = http_keep_alive_2 = 0;
685 post_content_type = NULL;
686 post_content_length = NULL;
688 /* Initialize certain elements of struct http_stat. */
693 hs->remote_time = NULL;
696 /* If we're using a proxy, we will be connecting to the proxy
698 conn = proxy ? proxy : u;
700 host_lookup_failed = 0;
702 /* First: establish the connection. */
703 if (inhibit_keep_alive
704 || !persistent_available_p (conn->host, conn->port,
706 u->scheme == SCHEME_HTTPS
710 , &host_lookup_failed))
712 /* In its current implementation, persistent_available_p will
713 look up conn->host in some cases. If that lookup failed, we
714 don't need to bother with connect_to_host. */
715 if (host_lookup_failed)
718 sock = connect_to_host (conn->host, conn->port);
722 return (retryable_socket_connect_error (errno)
723 ? CONERROR : CONIMPOSSIBLE);
726 if (conn->scheme == SCHEME_HTTPS)
728 if (!ssl_connect (sock))
730 logputs (LOG_VERBOSE, "\n");
731 logprintf (LOG_NOTQUIET,
732 _("Unable to establish SSL connection.\n"));
738 #endif /* HAVE_SSL */
742 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
743 pconn.host, pconn.port);
745 using_ssl = pconn.ssl;
746 DEBUGP (("Reusing fd %d.\n", sock));
751 else if (opt.post_file_name || opt.post_data)
759 referer = (char *)alloca (9 + strlen (hs->referer) + 3);
760 sprintf (referer, "Referer: %s\r\n", hs->referer);
763 if (*dt & SEND_NOCACHE)
764 pragma_h = "Pragma: no-cache\r\n";
770 range = (char *)alloca (13 + numdigit (hs->restval) + 4);
771 /* Gag me! Some servers (e.g. WebSitePro) have been known to
772 respond to the following `Range' format by generating a
773 multipart/x-byte-ranges MIME document! This MIME type was
774 present in an old draft of the byteranges specification.
775 HTTP/1.1 specifies a multipart/byte-ranges MIME type, but
776 only if multiple non-overlapping ranges are requested --
777 which Wget never does. */
778 sprintf (range, "Range: bytes=%ld-\r\n", hs->restval);
783 STRDUP_ALLOCA (useragent, opt.useragent);
786 useragent = (char *)alloca (10 + strlen (version_string));
787 sprintf (useragent, "Wget/%s", version_string);
789 /* Construct the authentication, if userid is present. */
792 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
793 user = user ? user : opt.http_user;
794 passwd = passwd ? passwd : opt.http_passwd;
801 /* We have the username and the password, but haven't tried
802 any authorization yet. Let's see if the "Basic" method
803 works. If not, we'll come back here and construct a
804 proper authorization method with the right challenges.
806 If we didn't employ this kind of logic, every URL that
807 requires authorization would have to be processed twice,
808 which is very suboptimal and generates a bunch of false
809 "unauthorized" errors in the server log.
811 #### But this logic also has a serious problem when used
812 with stronger authentications: we *first* transmit the
813 username and the password in clear text, and *then*
814 attempt a stronger authentication scheme. That cannot be
815 right! We are only fortunate that almost everyone still
816 uses the `Basic' scheme anyway.
818 There should be an option to prevent this from happening,
819 for those who use strong authentication schemes and value
821 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
825 /* Use the full path, i.e. one that includes the leading
826 slash and the query string, but is independent of proxy
828 char *pth = url_full_path (u);
829 wwwauth = create_authorization_line (authenticate_h, user, passwd,
838 char *proxy_user, *proxy_passwd;
839 /* For normal username and password, URL components override
840 command-line/wgetrc parameters. With proxy authentication,
841 it's the reverse, because proxy URLs are normally the
842 "permanent" ones, so command-line args should take
844 if (opt.proxy_user && opt.proxy_passwd)
846 proxy_user = opt.proxy_user;
847 proxy_passwd = opt.proxy_passwd;
851 proxy_user = proxy->user;
852 proxy_passwd = proxy->passwd;
854 /* #### This does not appear right. Can't the proxy request,
855 say, `Digest' authentication? */
856 if (proxy_user && proxy_passwd)
857 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd,
858 "Proxy-Authorization");
861 /* String of the form :PORT. Used only for non-standard ports. */
863 if (u->port != scheme_default_port (u->scheme))
865 port_maybe = (char *)alloca (numdigit (u->port) + 2);
866 sprintf (port_maybe, ":%d", u->port);
869 if (!inhibit_keep_alive)
870 request_keep_alive = "Connection: Keep-Alive\r\n";
872 request_keep_alive = NULL;
875 cookies = cookie_header (wget_cookie_jar, u->host, u->port, u->path,
877 u->scheme == SCHEME_HTTPS
883 if (opt.post_data || opt.post_file_name)
885 post_content_type = "Content-Type: application/x-www-form-urlencoded\r\n";
887 post_data_size = strlen (opt.post_data);
890 post_data_size = file_size (opt.post_file_name);
891 if (post_data_size == -1)
893 logprintf (LOG_NOTQUIET, "POST data file missing: %s\n",
898 post_content_length = xmalloc (16 + numdigit (post_data_size) + 2 + 1);
899 sprintf (post_content_length,
900 "Content-Length: %ld\r\n", post_data_size);
904 full_path = xstrdup (u->url);
906 /* Use the full path, i.e. one that includes the leading slash and
907 the query string. E.g. if u->path is "foo/bar" and u->query is
908 "param=value", full_path will be "/foo/bar?param=value". */
909 full_path = url_full_path (u);
911 if (strchr (u->host, ':'))
912 squares_around_host = 1;
914 /* Allocate the memory for the request. */
915 request = (char *)alloca (strlen (command)
919 + (port_maybe ? strlen (port_maybe) : 0)
920 + strlen (HTTP_ACCEPT)
921 + (request_keep_alive
922 ? strlen (request_keep_alive) : 0)
923 + (referer ? strlen (referer) : 0)
924 + (cookies ? strlen (cookies) : 0)
925 + (wwwauth ? strlen (wwwauth) : 0)
926 + (proxyauth ? strlen (proxyauth) : 0)
927 + (range ? strlen (range) : 0)
930 ? strlen (post_content_type) : 0)
931 + (post_content_length
932 ? strlen (post_content_length) : 0)
933 + (opt.user_header ? strlen (opt.user_header) : 0)
935 /* Construct the request. */
941 %s%s%s%s%s%s%s%s%s%s\r\n",
944 squares_around_host ? "[" : "", u->host, squares_around_host ? "]" : "",
945 port_maybe ? port_maybe : "",
947 request_keep_alive ? request_keep_alive : "",
948 referer ? referer : "",
949 cookies ? cookies : "",
950 wwwauth ? wwwauth : "",
951 proxyauth ? proxyauth : "",
954 post_content_type ? post_content_type : "",
955 post_content_length ? post_content_length : "",
956 opt.user_header ? opt.user_header : "");
957 DEBUGP (("\n---request begin---\n%s", request));
959 /* Free the temporary memory. */
960 xfree_null (wwwauth);
961 xfree_null (proxyauth);
962 xfree_null (cookies);
965 /* Send the request to server. */
966 write_error = xwrite (sock, request, strlen (request), -1);
968 if (write_error >= 0)
972 DEBUGP (("[POST data: %s]\n", opt.post_data));
973 write_error = xwrite (sock, opt.post_data, post_data_size, -1);
975 else if (opt.post_file_name && post_data_size != 0)
976 write_error = post_file (sock, opt.post_file_name, post_data_size);
978 DEBUGP (("---request end---\n"));
982 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
984 CLOSE_INVALIDATE (sock);
987 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
988 proxy ? "Proxy" : "HTTP");
989 contlen = contrange = -1;
994 /* Before reading anything, initialize the rbuf. */
995 rbuf_initialize (&rbuf, sock);
999 DEBUGP (("\n---response begin---\n"));
1001 /* Header-fetching loop. */
1009 /* Get the header. */
1010 status = header_get (&rbuf, &hdr,
1011 /* Disallow continuations for status line. */
1012 (hcount == 1 ? HG_NO_CONTINUATIONS : HG_NONE));
1014 /* Check for errors. */
1015 if (status == HG_EOF && *hdr)
1017 /* This used to be an unconditional error, but that was
1018 somewhat controversial, because of a large number of
1019 broken CGI's that happily "forget" to send the second EOL
1020 before closing the connection of a HEAD request.
1022 So, the deal is to check whether the header is empty
1023 (*hdr is zero if it is); if yes, it means that the
1024 previous header was fully retrieved, and that -- most
1025 probably -- the request is complete. "...be liberal in
1026 what you accept." Oh boy. */
1027 logputs (LOG_VERBOSE, "\n");
1028 logputs (LOG_NOTQUIET, _("End of file while parsing headers.\n"));
1031 xfree_null (all_headers);
1032 CLOSE_INVALIDATE (sock);
1035 else if (status == HG_ERROR)
1037 logputs (LOG_VERBOSE, "\n");
1038 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1042 xfree_null (all_headers);
1043 CLOSE_INVALIDATE (sock);
1047 /* If the headers are to be saved to a file later, save them to
1049 if (opt.save_headers)
1051 int lh = strlen (hdr);
1052 all_headers = (char *)xrealloc (all_headers, all_length + lh + 2);
1053 memcpy (all_headers + all_length, hdr, lh);
1055 all_headers[all_length++] = '\n';
1056 all_headers[all_length] = '\0';
1059 /* Check for status line. */
1063 /* Parse the first line of server response. */
1064 statcode = parse_http_status_line (hdr, &error);
1065 hs->statcode = statcode;
1066 /* Store the descriptive response. */
1067 if (statcode == -1) /* malformed response */
1069 /* A common reason for "malformed response" error is the
1070 case when no data was actually received. Handle this
1073 hs->error = xstrdup (_("No data received"));
1075 hs->error = xstrdup (_("Malformed status line"));
1080 hs->error = xstrdup (_("(no description)"));
1082 hs->error = xstrdup (error);
1084 if ((statcode != -1)
1090 if (opt.server_response)
1091 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1093 logprintf (LOG_VERBOSE, "%2d %s", statcode, error);
1099 /* Exit on empty header. */
1106 /* Print the header if requested. */
1107 if (opt.server_response && hcount != 1)
1108 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1110 /* Try getting content-length. */
1111 if (contlen == -1 && !opt.ignore_length)
1112 if (header_process (hdr, "Content-Length", header_extract_number,
1115 /* Try getting content-type. */
1117 if (header_process (hdr, "Content-Type", http_process_type, &type))
1119 /* Try getting location. */
1121 if (header_process (hdr, "Location", header_strdup, &hs->newloc))
1123 /* Try getting last-modified. */
1124 if (!hs->remote_time)
1125 if (header_process (hdr, "Last-Modified", header_strdup,
1128 /* Try getting cookies. */
1130 if (header_process (hdr, "Set-Cookie", http_process_set_cookie, u))
1132 /* Try getting www-authentication. */
1133 if (!authenticate_h)
1134 if (header_process (hdr, "WWW-Authenticate", header_strdup,
1137 /* Check for accept-ranges header. If it contains the word
1138 `none', disable the ranges. */
1139 if (*dt & ACCEPTRANGES)
1142 if (header_process (hdr, "Accept-Ranges", http_process_none, &nonep))
1145 *dt &= ~ACCEPTRANGES;
1149 /* Try getting content-range. */
1150 if (contrange == -1)
1152 struct http_process_range_closure closure;
1153 if (header_process (hdr, "Content-Range", http_process_range, &closure))
1155 contrange = closure.first_byte_pos;
1159 /* Check for keep-alive related responses. */
1160 if (!inhibit_keep_alive)
1162 /* Check for the `Keep-Alive' header. */
1163 if (!http_keep_alive_1)
1165 if (header_process (hdr, "Keep-Alive", header_exists,
1166 &http_keep_alive_1))
1169 /* Check for `Connection: Keep-Alive'. */
1170 if (!http_keep_alive_2)
1172 if (header_process (hdr, "Connection", http_process_connection,
1173 &http_keep_alive_2))
1180 DEBUGP (("---response end---\n"));
1182 logputs (LOG_VERBOSE, "\n");
1185 && (http_keep_alive_1 || http_keep_alive_2))
1187 assert (inhibit_keep_alive == 0);
1191 /* The server has promised that it will not close the connection
1192 when we're done. This means that we can register it. */
1193 register_persistent (conn->host, conn->port, sock, using_ssl);
1195 if ((statcode == HTTP_STATUS_UNAUTHORIZED)
1198 /* Authorization is required. */
1202 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1203 might be more bytes in the body. */
1204 if (auth_tried_already)
1206 /* If we have tried it already, then there is not point
1209 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1210 xfree (authenticate_h);
1213 else if (!known_authentication_scheme_p (authenticate_h))
1215 xfree (authenticate_h);
1216 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1219 else if (BEGINS_WITH (authenticate_h, "Basic"))
1221 /* The authentication scheme is basic, the one we try by
1222 default, and it failed. There's no sense in trying
1228 auth_tried_already = 1;
1232 /* We do not need this anymore. */
1235 xfree (authenticate_h);
1236 authenticate_h = NULL;
1239 /* 20x responses are counted among successful by default. */
1240 if (H_20X (statcode))
1243 /* Return if redirected. */
1244 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1246 /* RFC2068 says that in case of the 300 (multiple choices)
1247 response, the server can output a preferred URL through
1248 `Location' header; otherwise, the request should be treated
1249 like GET. So, if the location is set, it will be a
1250 redirection; otherwise, just proceed normally. */
1251 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1255 logprintf (LOG_VERBOSE,
1256 _("Location: %s%s\n"),
1257 hs->newloc ? hs->newloc : _("unspecified"),
1258 hs->newloc ? _(" [following]") : "");
1259 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1260 might be more bytes in the body. */
1262 xfree_null (all_headers);
1267 /* If content-type is not given, assume text/html. This is because
1268 of the multitude of broken CGI's that "forget" to generate the
1271 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1272 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1277 if (opt.html_extension && (*dt & TEXTHTML))
1278 /* -E / --html-extension / html_extension = on was specified, and this is a
1279 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1280 already the file's suffix, tack on ".html". */
1282 char* last_period_in_local_filename = strrchr(*hs->local_file, '.');
1284 if (last_period_in_local_filename == NULL
1285 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1286 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1288 size_t local_filename_len = strlen(*hs->local_file);
1290 *hs->local_file = xrealloc(*hs->local_file,
1291 local_filename_len + sizeof(".html"));
1292 strcpy(*hs->local_file + local_filename_len, ".html");
1294 *dt |= ADDED_HTML_EXTENSION;
1298 if (contrange == -1)
1300 /* We did not get a content-range header. This means that the
1301 server did not honor our `Range' request. Normally, this
1302 means we should reset hs->restval and continue normally. */
1304 /* However, if `-c' is used, we need to be a bit more careful:
1306 1. If `-c' is specified and the file already existed when
1307 Wget was started, it would be a bad idea for us to start
1308 downloading it from scratch, effectively truncating it. I
1309 believe this cannot happen unless `-c' was specified.
1311 2. If `-c' is used on a file that is already fully
1312 downloaded, we're requesting bytes after the end of file,
1313 which can result in server not honoring `Range'. If this is
1314 the case, `Content-Length' will be equal to the length of the
1316 if (opt.always_rest)
1318 /* Check for condition #2. */
1319 if (hs->restval > 0 /* restart was requested. */
1320 && contlen != -1 /* we got content-length. */
1321 && hs->restval >= contlen /* file fully downloaded
1325 logputs (LOG_VERBOSE, _("\
1326 \n The file is already fully retrieved; nothing to do.\n\n"));
1327 /* In case the caller inspects. */
1330 /* Mark as successfully retrieved. */
1333 xfree_null (all_headers);
1334 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1335 might be more bytes in the body. */
1336 return RETRUNNEEDED;
1339 /* Check for condition #1. */
1340 if (hs->no_truncate)
1342 logprintf (LOG_NOTQUIET,
1345 Continued download failed on this file, which conflicts with `-c'.\n\
1346 Refusing to truncate existing file `%s'.\n\n"), *hs->local_file);
1348 xfree_null (all_headers);
1349 CLOSE_INVALIDATE (sock);
1350 return CONTNOTSUPPORTED;
1358 else if (contrange != hs->restval ||
1359 (H_PARTIAL (statcode) && contrange == -1))
1361 /* This means the whole request was somehow misunderstood by the
1362 server. Bail out. */
1364 xfree_null (all_headers);
1365 CLOSE_INVALIDATE (sock);
1372 contlen += contrange;
1374 contrange = -1; /* If conent-length was not sent,
1375 content-range will be ignored. */
1377 hs->contlen = contlen;
1381 if ((*dt & RETROKF) && !opt.server_response)
1383 /* No need to print this output if the body won't be
1384 downloaded at all, or if the original server response is
1386 logputs (LOG_VERBOSE, _("Length: "));
1389 logputs (LOG_VERBOSE, legible (contlen));
1390 if (contrange != -1)
1391 logprintf (LOG_VERBOSE, _(" (%s to go)"),
1392 legible (contlen - contrange));
1395 logputs (LOG_VERBOSE,
1396 opt.ignore_length ? _("ignored") : _("unspecified"));
1398 logprintf (LOG_VERBOSE, " [%s]\n", type);
1400 logputs (LOG_VERBOSE, "\n");
1404 type = NULL; /* We don't need it any more. */
1406 /* Return if we have no intention of further downloading. */
1407 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
1409 /* In case the caller cares to look... */
1413 xfree_null (all_headers);
1414 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1415 might be more bytes in the body. */
1416 return RETRFINISHED;
1419 /* Open the local file. */
1422 mkalldirs (*hs->local_file);
1424 rotate_backups (*hs->local_file);
1425 fp = fopen (*hs->local_file, hs->restval ? "ab" : "wb");
1428 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1429 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1430 might be more bytes in the body. */
1431 xfree_null (all_headers);
1437 extern int global_download_count;
1439 /* To ensure that repeated "from scratch" downloads work for -O
1440 files, we rewind the file pointer, unless restval is
1441 non-zero. (This works only when -O is used on regular files,
1442 but it's still a valuable feature.)
1444 However, this loses when more than one URL is specified on
1445 the command line the second rewinds eradicates the contents
1446 of the first download. Thus we disable the above trick for
1447 all the downloads except the very first one.
1449 #### A possible solution to this would be to remember the
1450 file position in the output document and to seek to that
1451 position, instead of rewinding.
1453 We don't truncate stdout, since that breaks
1454 "wget -O - [...] >> foo".
1456 if (!hs->restval && global_download_count == 0 && opt.dfp != stdout)
1458 /* This will silently fail for streams that don't correspond
1459 to regular files, but that's OK. */
1461 /* ftruncate is needed because opt.dfp is opened in append
1462 mode if opt.always_rest is set. */
1463 ftruncate (fileno (fp), 0);
1468 /* #### This confuses the code that checks for file size. There
1469 should be some overhead information. */
1470 if (opt.save_headers)
1471 fwrite (all_headers, 1, all_length, fp);
1473 /* Get the contents of the document. */
1474 hs->res = get_contents (sock, fp, &hs->len, hs->restval,
1475 (contlen != -1 ? contlen : 0),
1476 &rbuf, keep_alive, &hs->dltime);
1479 CLOSE_FINISH (sock);
1481 CLOSE_INVALIDATE (sock);
1484 /* Close or flush the file. We have to be careful to check for
1485 error here. Checking the result of fwrite() is not enough --
1486 errors could go unnoticed! */
1489 flush_res = fclose (fp);
1491 flush_res = fflush (fp);
1492 if (flush_res == EOF)
1495 xfree_null (all_headers);
1498 return RETRFINISHED;
1501 /* The genuine HTTP loop! This is the part where the retrieval is
1502 retried, and retried, and retried, and... */
1504 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1505 int *dt, struct url *proxy)
1508 int use_ts, got_head = 0; /* time-stamping info */
1509 char *filename_plus_orig_suffix;
1510 char *local_filename = NULL;
1511 char *tms, *locf, *tmrate;
1513 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1514 long local_size = 0; /* the size of the local file */
1515 size_t filename_len;
1516 struct http_stat hstat; /* HTTP status */
1520 /* This used to be done in main(), but it's a better idea to do it
1521 here so that we don't go through the hoops if we're just using
1525 if (!wget_cookie_jar)
1526 wget_cookie_jar = cookie_jar_new ();
1527 if (opt.cookies_input && !cookies_loaded_p)
1529 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
1530 cookies_loaded_p = 1;
1536 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
1537 has_wildcards_p because it would also warn on `?', and we know that
1538 shows up in CGI paths a *lot*. */
1539 if (strchr (u->url, '*'))
1540 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
1542 /* Determine the local filename. */
1543 if (local_file && *local_file)
1544 hstat.local_file = local_file;
1545 else if (local_file)
1547 *local_file = url_file_name (u);
1548 hstat.local_file = local_file;
1552 dummy = url_file_name (u);
1553 hstat.local_file = &dummy;
1556 if (!opt.output_document)
1557 locf = *hstat.local_file;
1559 locf = opt.output_document;
1561 hstat.referer = referer;
1563 filename_len = strlen (*hstat.local_file);
1564 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1566 if (opt.noclobber && file_exists_p (*hstat.local_file))
1568 /* If opt.noclobber is turned on and file already exists, do not
1569 retrieve the file */
1570 logprintf (LOG_VERBOSE, _("\
1571 File `%s' already there, will not retrieve.\n"), *hstat.local_file);
1572 /* If the file is there, we suppose it's retrieved OK. */
1575 /* #### Bogusness alert. */
1576 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1577 if (has_html_suffix_p (*hstat.local_file))
1585 if (opt.timestamping)
1587 int local_dot_orig_file_exists = 0;
1589 if (opt.backup_converted)
1590 /* If -K is specified, we'll act on the assumption that it was specified
1591 last time these files were downloaded as well, and instead of just
1592 comparing local file X against server file X, we'll compare local
1593 file X.orig (if extant, else X) against server file X. If -K
1594 _wasn't_ specified last time, or the server contains files called
1595 *.orig, -N will be back to not operating correctly with -k. */
1597 /* Would a single s[n]printf() call be faster? --dan
1599 Definitely not. sprintf() is horribly slow. It's a
1600 different question whether the difference between the two
1601 affects a program. Usually I'd say "no", but at one
1602 point I profiled Wget, and found that a measurable and
1603 non-negligible amount of time was lost calling sprintf()
1604 in url.c. Replacing sprintf with inline calls to
1605 strcpy() and long_to_string() made a difference.
1607 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
1608 memcpy (filename_plus_orig_suffix + filename_len,
1609 ".orig", sizeof (".orig"));
1611 /* Try to stat() the .orig file. */
1612 if (stat (filename_plus_orig_suffix, &st) == 0)
1614 local_dot_orig_file_exists = 1;
1615 local_filename = filename_plus_orig_suffix;
1619 if (!local_dot_orig_file_exists)
1620 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1621 if (stat (*hstat.local_file, &st) == 0)
1622 local_filename = *hstat.local_file;
1624 if (local_filename != NULL)
1625 /* There was a local file, so we'll check later to see if the version
1626 the server has is the same version we already have, allowing us to
1632 /* Modification time granularity is 2 seconds for Windows, so
1633 increase local time by 1 second for later comparison. */
1636 local_size = st.st_size;
1640 /* Reset the counter. */
1642 *dt = 0 | ACCEPTRANGES;
1646 /* Increment the pass counter. */
1648 sleep_between_retrievals (count);
1649 /* Get the current time string. */
1650 tms = time_str (NULL);
1651 /* Print fetch message, if opt.verbose. */
1654 char *hurl = url_string (u, 1);
1658 sprintf (tmp, _("(try:%2d)"), count);
1659 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1660 tms, hurl, tmp, locf);
1662 ws_changetitle (hurl, 1);
1667 /* Default document type is empty. However, if spider mode is
1668 on or time-stamping is employed, HEAD_ONLY commands is
1669 encoded within *dt. */
1670 if (opt.spider || (use_ts && !got_head))
1674 /* Assume no restarting. */
1676 /* Decide whether or not to restart. */
1677 if (((count > 1 && (*dt & ACCEPTRANGES)) || opt.always_rest)
1678 /* #### this calls access() and then stat(); could be optimized. */
1679 && file_exists_p (locf))
1680 if (stat (locf, &st) == 0 && S_ISREG (st.st_mode))
1681 hstat.restval = st.st_size;
1683 /* In `-c' is used and the file is existing and non-empty,
1684 refuse to truncate it if the server doesn't support continued
1686 hstat.no_truncate = 0;
1687 if (opt.always_rest && hstat.restval)
1688 hstat.no_truncate = 1;
1690 /* Decide whether to send the no-cache directive. We send it in
1692 a) we're using a proxy, and we're past our first retrieval.
1693 Some proxies are notorious for caching incomplete data, so
1694 we require a fresh get.
1695 b) caching is explicitly inhibited. */
1696 if ((proxy && count > 1) /* a */
1697 || !opt.allow_cache /* b */
1699 *dt |= SEND_NOCACHE;
1701 *dt &= ~SEND_NOCACHE;
1703 /* Try fetching the document, or at least its head. */
1704 err = gethttp (u, &hstat, dt, proxy);
1706 /* It's unfortunate that wget determines the local filename before finding
1707 out the Content-Type of the file. Barring a major restructuring of the
1708 code, we need to re-set locf here, since gethttp() may have xrealloc()d
1709 *hstat.local_file to tack on ".html". */
1710 if (!opt.output_document)
1711 locf = *hstat.local_file;
1713 locf = opt.output_document;
1716 tms = time_str (NULL);
1717 /* Get the new location (with or without the redirection). */
1719 *newloc = xstrdup (hstat.newloc);
1722 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
1723 case CONERROR: case READERR: case WRITEFAILED:
1725 /* Non-fatal errors continue executing the loop, which will
1726 bring them to "while" statement at the end, to judge
1727 whether the number of tries was exceeded. */
1728 free_hstat (&hstat);
1729 printwhat (count, opt.ntry);
1732 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
1733 case SSLERRCTXCREATE: case CONTNOTSUPPORTED:
1734 /* Fatal errors just return from the function. */
1735 free_hstat (&hstat);
1739 case FWRITEERR: case FOPENERR:
1740 /* Another fatal error. */
1741 logputs (LOG_VERBOSE, "\n");
1742 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
1743 *hstat.local_file, strerror (errno));
1744 free_hstat (&hstat);
1749 /* Another fatal error. */
1750 logputs (LOG_VERBOSE, "\n");
1751 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
1752 free_hstat (&hstat);
1757 /* Return the new location to the caller. */
1760 logprintf (LOG_NOTQUIET,
1761 _("ERROR: Redirection (%d) without location.\n"),
1763 free_hstat (&hstat);
1767 free_hstat (&hstat);
1772 /* The file was already fully retrieved. */
1773 free_hstat (&hstat);
1778 /* Deal with you later. */
1781 /* All possibilities should have been exhausted. */
1784 if (!(*dt & RETROKF))
1788 /* #### Ugly ugly ugly! */
1789 char *hurl = url_string (u, 1);
1790 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
1793 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
1794 tms, hstat.statcode, hstat.error);
1795 logputs (LOG_VERBOSE, "\n");
1796 free_hstat (&hstat);
1801 /* Did we get the time-stamp? */
1804 if (opt.timestamping && !hstat.remote_time)
1806 logputs (LOG_NOTQUIET, _("\
1807 Last-modified header missing -- time-stamps turned off.\n"));
1809 else if (hstat.remote_time)
1811 /* Convert the date-string into struct tm. */
1812 tmr = http_atotm (hstat.remote_time);
1813 if (tmr == (time_t) (-1))
1814 logputs (LOG_VERBOSE, _("\
1815 Last-modified header invalid -- time-stamp ignored.\n"));
1819 /* The time-stamping section. */
1824 use_ts = 0; /* no more time-stamping */
1825 count = 0; /* the retrieve count for HEAD is
1827 if (hstat.remote_time && tmr != (time_t) (-1))
1829 /* Now time-stamping can be used validly. Time-stamping
1830 means that if the sizes of the local and remote file
1831 match, and local file is newer than the remote file,
1832 it will not be retrieved. Otherwise, the normal
1833 download procedure is resumed. */
1835 (hstat.contlen == -1 || local_size == hstat.contlen))
1837 logprintf (LOG_VERBOSE, _("\
1838 Server file no newer than local file `%s' -- not retrieving.\n\n"),
1840 free_hstat (&hstat);
1844 else if (tml >= tmr)
1845 logprintf (LOG_VERBOSE, _("\
1846 The sizes do not match (local %ld) -- retrieving.\n"), local_size);
1848 logputs (LOG_VERBOSE,
1849 _("Remote file is newer, retrieving.\n"));
1851 free_hstat (&hstat);
1854 if ((tmr != (time_t) (-1))
1856 && ((hstat.len == hstat.contlen) ||
1857 ((hstat.res == 0) &&
1858 ((hstat.contlen == -1) ||
1859 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
1861 /* #### This code repeats in http.c and ftp.c. Move it to a
1863 const char *fl = NULL;
1864 if (opt.output_document)
1866 if (opt.od_known_regular)
1867 fl = opt.output_document;
1870 fl = *hstat.local_file;
1874 /* End of time-stamping section. */
1878 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode, hstat.error);
1883 tmrate = retr_rate (hstat.len - hstat.restval, hstat.dltime, 0);
1885 if (hstat.len == hstat.contlen)
1889 logprintf (LOG_VERBOSE,
1890 _("%s (%s) - `%s' saved [%ld/%ld]\n\n"),
1891 tms, tmrate, locf, hstat.len, hstat.contlen);
1892 logprintf (LOG_NONVERBOSE,
1893 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1894 tms, u->url, hstat.len, hstat.contlen, locf, count);
1897 total_downloaded_bytes += hstat.len;
1899 /* Remember that we downloaded the file for later ".orig" code. */
1900 if (*dt & ADDED_HTML_EXTENSION)
1901 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1903 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1905 free_hstat (&hstat);
1909 else if (hstat.res == 0) /* No read error */
1911 if (hstat.contlen == -1) /* We don't know how much we were supposed
1912 to get, so assume we succeeded. */
1916 logprintf (LOG_VERBOSE,
1917 _("%s (%s) - `%s' saved [%ld]\n\n"),
1918 tms, tmrate, locf, hstat.len);
1919 logprintf (LOG_NONVERBOSE,
1920 "%s URL:%s [%ld] -> \"%s\" [%d]\n",
1921 tms, u->url, hstat.len, locf, count);
1924 total_downloaded_bytes += hstat.len;
1926 /* Remember that we downloaded the file for later ".orig" code. */
1927 if (*dt & ADDED_HTML_EXTENSION)
1928 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1930 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1932 free_hstat (&hstat);
1936 else if (hstat.len < hstat.contlen) /* meaning we lost the
1937 connection too soon */
1939 logprintf (LOG_VERBOSE,
1940 _("%s (%s) - Connection closed at byte %ld. "),
1941 tms, tmrate, hstat.len);
1942 printwhat (count, opt.ntry);
1943 free_hstat (&hstat);
1946 else if (!opt.kill_longer) /* meaning we got more than expected */
1948 logprintf (LOG_VERBOSE,
1949 _("%s (%s) - `%s' saved [%ld/%ld])\n\n"),
1950 tms, tmrate, locf, hstat.len, hstat.contlen);
1951 logprintf (LOG_NONVERBOSE,
1952 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1953 tms, u->url, hstat.len, hstat.contlen, locf, count);
1955 total_downloaded_bytes += hstat.len;
1957 /* Remember that we downloaded the file for later ".orig" code. */
1958 if (*dt & ADDED_HTML_EXTENSION)
1959 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1961 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1963 free_hstat (&hstat);
1967 else /* the same, but not accepted */
1969 logprintf (LOG_VERBOSE,
1970 _("%s (%s) - Connection closed at byte %ld/%ld. "),
1971 tms, tmrate, hstat.len, hstat.contlen);
1972 printwhat (count, opt.ntry);
1973 free_hstat (&hstat);
1977 else /* now hstat.res can only be -1 */
1979 if (hstat.contlen == -1)
1981 logprintf (LOG_VERBOSE,
1982 _("%s (%s) - Read error at byte %ld (%s)."),
1983 tms, tmrate, hstat.len, strerror (errno));
1984 printwhat (count, opt.ntry);
1985 free_hstat (&hstat);
1988 else /* hstat.res == -1 and contlen is given */
1990 logprintf (LOG_VERBOSE,
1991 _("%s (%s) - Read error at byte %ld/%ld (%s). "),
1992 tms, tmrate, hstat.len, hstat.contlen,
1994 printwhat (count, opt.ntry);
1995 free_hstat (&hstat);
2002 while (!opt.ntry || (count < opt.ntry));
2006 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
2007 than local timezone.
2009 mktime is similar but assumes struct tm, also known as the
2010 "broken-down" form of time, is in local time zone. mktime_from_utc
2011 uses mktime to make the conversion understanding that an offset
2012 will be introduced by the local time assumption.
2014 mktime_from_utc then measures the introduced offset by applying
2015 gmtime to the initial result and applying mktime to the resulting
2016 "broken-down" form. The difference between the two mktime results
2017 is the measured offset which is then subtracted from the initial
2018 mktime result to yield a calendar time which is the value returned.
2020 tm_isdst in struct tm is set to 0 to force mktime to introduce a
2021 consistent offset (the non DST offset) since tm and tm+o might be
2022 on opposite sides of a DST change.
2024 Some implementations of mktime return -1 for the nonexistent
2025 localtime hour at the beginning of DST. In this event, use
2026 mktime(tm - 1hr) + 3600.
2030 gmtime(t+o) --> tm+o
2031 mktime(tm+o) --> t+2o
2032 t+o - (t+2o - t+o) = t
2034 Note that glibc contains a function of the same purpose named
2035 `timegm' (reverse of gmtime). But obviously, it is not universally
2036 available, and unfortunately it is not straightforwardly
2037 extractable for use here. Perhaps configure should detect timegm
2038 and use it where available.
2040 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
2041 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO.
2042 Further improved by Roger with assistance from Edward J. Sabol
2043 based on input by Jamie Zawinski. */
2046 mktime_from_utc (struct tm *t)
2057 return -1; /* can't deal with output from strptime */
2068 return -1; /* can't deal with output from gmtime */
2071 return (tl - (tb - tl));
2074 /* Check whether the result of strptime() indicates success.
2075 strptime() returns the pointer to how far it got to in the string.
2076 The processing has been successful if the string is at `GMT' or
2077 `+X', or at the end of the string.
2079 In extended regexp parlance, the function returns 1 if P matches
2080 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2081 can return) is considered a failure and 0 is returned. */
2083 check_end (const char *p)
2087 while (ISSPACE (*p))
2090 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2091 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2097 /* Convert the textual specification of time in TIME_STRING to the
2098 number of seconds since the Epoch.
2100 TIME_STRING can be in any of the three formats RFC2068 allows the
2101 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date.
2102 Timezones are ignored, and should be GMT.
2104 Return the computed time_t representation, or -1 if the conversion
2107 This function uses strptime with various string formats for parsing
2108 TIME_STRING. This results in a parser that is not as lenient in
2109 interpreting TIME_STRING as I would like it to be. Being based on
2110 strptime, it always allows shortened months, one-digit days, etc.,
2111 but due to the multitude of formats in which time can be
2112 represented, an ideal HTTP time parser would be even more
2113 forgiving. It should completely ignore things like week days and
2114 concentrate only on the various forms of representing years,
2115 months, days, hours, minutes, and seconds. For example, it would
2116 be nice if it accepted ISO 8601 out of the box.
2118 I've investigated free and PD code for this purpose, but none was
2119 usable. getdate was big and unwieldy, and had potential copyright
2120 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2121 distributed with phttpd, is excellent, but we cannot use it because
2122 it is not assigned to the FSF. So I stuck it with strptime. */
2125 http_atotm (const char *time_string)
2127 /* NOTE: Solaris strptime man page claims that %n and %t match white
2128 space, but that's not universally available. Instead, we simply
2129 use ` ' to mean "skip all WS", which works under all strptime
2130 implementations I've tested. */
2132 static const char *time_formats[] = {
2133 "%a, %d %b %Y %T", /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
2134 "%A, %d-%b-%y %T", /* RFC850: Thursday, 29-Jan-98 22:12:57 */
2135 "%a, %d-%b-%Y %T", /* pseudo-RFC850: Thu, 29-Jan-1998 22:12:57
2136 (google.com uses this for their cookies.) */
2137 "%a %b %d %T %Y" /* asctime: Thu Jan 29 22:12:57 1998 */
2143 /* According to Roger Beeman, we need to initialize tm_isdst, since
2144 strptime won't do it. */
2147 /* Note that under foreign locales Solaris strptime() fails to
2148 recognize English dates, which renders this function useless. We
2149 solve this by being careful not to affect LC_TIME when
2150 initializing locale.
2152 Another solution would be to temporarily set locale to C, invoke
2153 strptime(), and restore it back. This is slow and dirty,
2154 however, and locale support other than LC_MESSAGES can mess other
2155 things, so I rather chose to stick with just setting LC_MESSAGES.
2157 GNU strptime does not have this problem because it recognizes
2158 both international and local dates. */
2160 for (i = 0; i < countof (time_formats); i++)
2161 if (check_end (strptime (time_string, time_formats[i], &t)))
2162 return mktime_from_utc (&t);
2164 /* All formats have failed. */
2168 /* Authorization support: We support two authorization schemes:
2170 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2172 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2173 consisting of answering to the server's challenge with the proper
2176 /* How many bytes it will take to store LEN bytes in base64. */
2177 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
2179 /* Encode the string S of length LENGTH to base64 format and place it
2180 to STORE. STORE will be 0-terminated, and must point to a writable
2181 buffer of at least 1+BASE64_LENGTH(length) bytes. */
2183 base64_encode (const char *s, char *store, int length)
2185 /* Conversion table. */
2186 static char tbl[64] = {
2187 'A','B','C','D','E','F','G','H',
2188 'I','J','K','L','M','N','O','P',
2189 'Q','R','S','T','U','V','W','X',
2190 'Y','Z','a','b','c','d','e','f',
2191 'g','h','i','j','k','l','m','n',
2192 'o','p','q','r','s','t','u','v',
2193 'w','x','y','z','0','1','2','3',
2194 '4','5','6','7','8','9','+','/'
2197 unsigned char *p = (unsigned char *)store;
2199 /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
2200 for (i = 0; i < length; i += 3)
2202 *p++ = tbl[s[0] >> 2];
2203 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
2204 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
2205 *p++ = tbl[s[2] & 0x3f];
2208 /* Pad the result if necessary... */
2209 if (i == length + 1)
2211 else if (i == length + 2)
2212 *(p - 1) = *(p - 2) = '=';
2213 /* ...and zero-terminate it. */
2217 /* Create the authentication header contents for the `Basic' scheme.
2218 This is done by encoding the string `USER:PASS' in base64 and
2219 prepending `HEADER: Basic ' to it. */
2221 basic_authentication_encode (const char *user, const char *passwd,
2224 char *t1, *t2, *res;
2225 int len1 = strlen (user) + 1 + strlen (passwd);
2226 int len2 = BASE64_LENGTH (len1);
2228 t1 = (char *)alloca (len1 + 1);
2229 sprintf (t1, "%s:%s", user, passwd);
2230 t2 = (char *)alloca (1 + len2);
2231 base64_encode (t1, t2, len1);
2232 res = (char *)xmalloc (len2 + 11 + strlen (header));
2233 sprintf (res, "%s: Basic %s\r\n", header, t2);
2239 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2240 of a field in such a header. If the field is the one specified by
2241 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2242 digest authorization code), extract its value in the (char*)
2243 variable pointed by RET. Returns negative on a malformed header,
2244 or number of bytes that have been parsed by this call. */
2246 extract_header_attr (const char *au, const char *attr_name, char **ret)
2248 const char *cp, *ep;
2252 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2254 cp += strlen (attr_name);
2257 cp += skip_lws (cp);
2262 cp += skip_lws (cp);
2267 for (ep = cp; *ep && *ep != '\"'; ep++)
2272 *ret = strdupdelim (cp, ep);
2279 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2280 an array of 16 bytes containing the hash keys, and BUF should be a
2281 buffer of 33 writable characters (32 for hex digits plus one for
2282 zero termination). */
2284 dump_hash (unsigned char *buf, const unsigned char *hash)
2288 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2290 *buf++ = XNUM_TO_digit (*hash >> 4);
2291 *buf++ = XNUM_TO_digit (*hash & 0xf);
2296 /* Take the line apart to find the challenge, and compose a digest
2297 authorization header. See RFC2069 section 2.1.2. */
2299 digest_authentication_encode (const char *au, const char *user,
2300 const char *passwd, const char *method,
2303 static char *realm, *opaque, *nonce;
2308 { "realm", &realm },
2309 { "opaque", &opaque },
2314 realm = opaque = nonce = NULL;
2316 au += 6; /* skip over `Digest' */
2321 au += skip_lws (au);
2322 for (i = 0; i < countof (options); i++)
2324 int skip = extract_header_attr (au, options[i].name,
2325 options[i].variable);
2329 xfree_null (opaque);
2339 if (i == countof (options))
2341 while (*au && *au != '=')
2345 au += skip_lws (au);
2349 while (*au && *au != '\"')
2356 while (*au && *au != ',')
2361 if (!realm || !nonce || !user || !passwd || !path || !method)
2364 xfree_null (opaque);
2369 /* Calculate the digest value. */
2371 ALLOCA_MD5_CONTEXT (ctx);
2372 unsigned char hash[MD5_HASHLEN];
2373 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2374 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
2376 /* A1BUF = H(user ":" realm ":" password) */
2378 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2379 gen_md5_update ((unsigned char *)":", 1, ctx);
2380 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2381 gen_md5_update ((unsigned char *)":", 1, ctx);
2382 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2383 gen_md5_finish (ctx, hash);
2384 dump_hash (a1buf, hash);
2386 /* A2BUF = H(method ":" path) */
2388 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2389 gen_md5_update ((unsigned char *)":", 1, ctx);
2390 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2391 gen_md5_finish (ctx, hash);
2392 dump_hash (a2buf, hash);
2394 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2396 gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
2397 gen_md5_update ((unsigned char *)":", 1, ctx);
2398 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2399 gen_md5_update ((unsigned char *)":", 1, ctx);
2400 gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
2401 gen_md5_finish (ctx, hash);
2402 dump_hash (response_digest, hash);
2404 res = (char*) xmalloc (strlen (user)
2409 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2410 + (opaque ? strlen (opaque) : 0)
2412 sprintf (res, "Authorization: Digest \
2413 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2414 user, realm, nonce, path, response_digest);
2417 char *p = res + strlen (res);
2418 strcat (p, ", opaque=\"");
2422 strcat (res, "\r\n");
2426 #endif /* USE_DIGEST */
2429 #define BEGINS_WITH(line, string_constant) \
2430 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
2431 && (ISSPACE (line[sizeof (string_constant) - 1]) \
2432 || !line[sizeof (string_constant) - 1]))
2435 known_authentication_scheme_p (const char *au)
2437 return BEGINS_WITH (au, "Basic")
2438 || BEGINS_WITH (au, "Digest")
2439 || BEGINS_WITH (au, "NTLM");
2444 /* Create the HTTP authorization request header. When the
2445 `WWW-Authenticate' response header is seen, according to the
2446 authorization scheme specified in that header (`Basic' and `Digest'
2447 are supported by the current implementation), produce an
2448 appropriate HTTP authorization request header. */
2450 create_authorization_line (const char *au, const char *user,
2451 const char *passwd, const char *method,
2454 char *wwwauth = NULL;
2456 if (!strncasecmp (au, "Basic", 5))
2457 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2458 if (!strncasecmp (au, "NTLM", 4))
2459 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2461 else if (!strncasecmp (au, "Digest", 6))
2462 wwwauth = digest_authentication_encode (au, user, passwd, method, path);
2463 #endif /* USE_DIGEST */