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 /* This is somewhat evil, but works in practice: if the address
442 that pconn.socket is connected to is one of the IP addresses
443 HOST resolves to, we don't need to reconnect. #### Is it
444 correct to do this by default? */
447 struct address_list *al;
449 if (!socket_ip_address (pconn.socket, &ip, 0))
451 /* Can't get the peer's address -- something must be wrong
452 with the connection. */
453 invalidate_persistent ();
456 al = lookup_host (host, 0);
459 *host_lookup_failed = 1;
463 found = address_list_find (al, &ip);
464 address_list_release (al);
469 /* HOST resolves to an address pconn.sock is connected to -- no
470 need to reconnect. */
473 /* Finally, check whether the connection is still open. This is
474 important because most server implement a liberal (short) timeout
475 on persistent connections. Wget can of course always reconnect
476 if the connection doesn't work out, but it's nicer to know in
477 advance. This test is a logical followup of the first test, but
478 is "expensive" and therefore placed at the end of the list. */
480 if (!test_socket_open (pconn.socket))
482 /* Oops, the socket is no longer open. Now that we know that,
483 let's invalidate the persistent connection before returning
485 invalidate_persistent ();
492 /* The idea behind these two CLOSE macros is to distinguish between
493 two cases: one when the job we've been doing is finished, and we
494 want to close the connection and leave, and two when something is
495 seriously wrong and we're closing the connection as part of
498 In case of keep_alive, CLOSE_FINISH should leave the connection
499 open, while CLOSE_INVALIDATE should still close it.
501 Note that the semantics of the flag `keep_alive' is "this
502 connection *will* be reused (the server has promised not to close
503 the connection once we're done)", while the semantics of
504 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
505 active, registered connection". */
507 #define CLOSE_FINISH(fd) do { \
510 if (pconn_active && (fd) == pconn.socket) \
511 invalidate_persistent (); \
517 #define CLOSE_INVALIDATE(fd) do { \
518 if (pconn_active && (fd) == pconn.socket) \
519 invalidate_persistent (); \
526 long len; /* received length */
527 long contlen; /* expected length */
528 long restval; /* the restart value */
529 int res; /* the result of last read */
530 char *newloc; /* new location (redirection) */
531 char *remote_time; /* remote time-stamp string */
532 char *error; /* textual HTTP error */
533 int statcode; /* status code */
534 double dltime; /* time of the download in msecs */
535 int no_truncate; /* whether truncating the file is
537 const char *referer; /* value of the referer header. */
538 char **local_file; /* local file. */
542 free_hstat (struct http_stat *hs)
544 xfree_null (hs->newloc);
545 xfree_null (hs->remote_time);
546 xfree_null (hs->error);
548 /* Guard against being called twice. */
550 hs->remote_time = NULL;
554 static char *create_authorization_line PARAMS ((const char *, const char *,
555 const char *, const char *,
557 static char *basic_authentication_encode PARAMS ((const char *, const char *,
559 static int known_authentication_scheme_p PARAMS ((const char *));
561 time_t http_atotm PARAMS ((const char *));
563 #define BEGINS_WITH(line, string_constant) \
564 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
565 && (ISSPACE (line[sizeof (string_constant) - 1]) \
566 || !line[sizeof (string_constant) - 1]))
568 /* Retrieve a document through HTTP protocol. It recognizes status
569 code, and correctly handles redirections. It closes the network
570 socket. If it receives an error from the functions below it, it
571 will print it if there is enough information to do so (almost
572 always), returning the error to the caller (i.e. http_loop).
574 Various HTTP parameters are stored to hs. Although it parses the
575 response code correctly, it is not used in a sane way. The caller
578 If PROXY is non-NULL, the connection will be made to the proxy
579 server, and u->url will be requested. */
581 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
583 char *request, *type, *command, *full_path;
585 char *pragma_h, *referer, *useragent, *range, *wwwauth;
586 char *authenticate_h;
590 char *request_keep_alive;
591 int sock, hcount, all_length, statcode;
593 long contlen, contrange;
596 int auth_tried_already;
599 char *cookies = NULL;
601 /* Whether this connection will be kept alive after the HTTP request
605 /* Flags that detect the two ways of specifying HTTP keep-alive
607 int http_keep_alive_1, http_keep_alive_2;
609 /* Whether keep-alive should be inhibited. */
610 int inhibit_keep_alive;
612 /* Whether we need to print the host header with braces around host,
613 e.g. "Host: [3ffe:8100:200:2::2]:1234" instead of the usual
614 "Host: symbolic-name:1234". */
615 int squares_around_host = 0;
617 /* Headers sent when using POST. */
618 char *post_content_type, *post_content_length;
619 long post_data_size = 0;
621 int host_lookup_failed;
624 /* Initialize the SSL context. After the first run, this is a
628 case SSLERRCTXCREATE:
630 logprintf (LOG_NOTQUIET, _("Failed to set up an SSL context\n"));
631 return SSLERRCTXCREATE;
633 /* try without certfile */
634 logprintf (LOG_NOTQUIET,
635 _("Failed to load certificates from %s\n"),
637 logprintf (LOG_NOTQUIET,
638 _("Trying without the specified certificate\n"));
641 logprintf (LOG_NOTQUIET,
642 _("Failed to get certificate key from %s\n"),
644 logprintf (LOG_NOTQUIET,
645 _("Trying without the specified certificate\n"));
650 #endif /* HAVE_SSL */
652 if (!(*dt & HEAD_ONLY))
653 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
654 know the local filename so we can save to it. */
655 assert (*hs->local_file != NULL);
658 auth_tried_already = 0;
660 inhibit_keep_alive = !opt.http_keep_alive || proxy != NULL;
663 /* We need to come back here when the initial attempt to retrieve
664 without authorization header fails. (Expected to happen at least
665 for the Digest authorization scheme.) */
668 http_keep_alive_1 = http_keep_alive_2 = 0;
670 post_content_type = NULL;
671 post_content_length = NULL;
673 /* Initialize certain elements of struct http_stat. */
678 hs->remote_time = NULL;
681 /* If we're using a proxy, we will be connecting to the proxy
683 conn = proxy ? proxy : u;
685 host_lookup_failed = 0;
687 /* First: establish the connection. */
688 if (inhibit_keep_alive
689 || !persistent_available_p (conn->host, conn->port,
691 u->scheme == SCHEME_HTTPS
695 , &host_lookup_failed))
697 /* In its current implementation, persistent_available_p will
698 look up conn->host in some cases. If that lookup failed, we
699 don't need to bother with connect_to_host. */
700 if (host_lookup_failed)
703 sock = connect_to_host (conn->host, conn->port);
707 return CONNECT_ERROR (errno);
710 if (conn->scheme == SCHEME_HTTPS)
712 if (!ssl_connect (sock))
714 logputs (LOG_VERBOSE, "\n");
715 logprintf (LOG_NOTQUIET,
716 _("Unable to establish SSL connection.\n"));
722 #endif /* HAVE_SSL */
726 logprintf (LOG_VERBOSE, _("Reusing connection to %s:%hu.\n"),
727 conn->host, conn->port);
728 /* #### pc_last_fd should be accessed through an accessor
731 using_ssl = pconn.ssl;
732 DEBUGP (("Reusing fd %d.\n", sock));
737 else if (opt.post_file_name || opt.post_data)
745 referer = (char *)alloca (9 + strlen (hs->referer) + 3);
746 sprintf (referer, "Referer: %s\r\n", hs->referer);
749 if (*dt & SEND_NOCACHE)
750 pragma_h = "Pragma: no-cache\r\n";
756 range = (char *)alloca (13 + numdigit (hs->restval) + 4);
757 /* Gag me! Some servers (e.g. WebSitePro) have been known to
758 respond to the following `Range' format by generating a
759 multipart/x-byte-ranges MIME document! This MIME type was
760 present in an old draft of the byteranges specification.
761 HTTP/1.1 specifies a multipart/byte-ranges MIME type, but
762 only if multiple non-overlapping ranges are requested --
763 which Wget never does. */
764 sprintf (range, "Range: bytes=%ld-\r\n", hs->restval);
769 STRDUP_ALLOCA (useragent, opt.useragent);
772 useragent = (char *)alloca (10 + strlen (version_string));
773 sprintf (useragent, "Wget/%s", version_string);
775 /* Construct the authentication, if userid is present. */
778 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
779 user = user ? user : opt.http_user;
780 passwd = passwd ? passwd : opt.http_passwd;
787 /* We have the username and the password, but haven't tried
788 any authorization yet. Let's see if the "Basic" method
789 works. If not, we'll come back here and construct a
790 proper authorization method with the right challenges.
792 If we didn't employ this kind of logic, every URL that
793 requires authorization would have to be processed twice,
794 which is very suboptimal and generates a bunch of false
795 "unauthorized" errors in the server log.
797 #### But this logic also has a serious problem when used
798 with stronger authentications: we *first* transmit the
799 username and the password in clear text, and *then*
800 attempt a stronger authentication scheme. That cannot be
801 right! We are only fortunate that almost everyone still
802 uses the `Basic' scheme anyway.
804 There should be an option to prevent this from happening,
805 for those who use strong authentication schemes and value
807 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
811 /* Use the full path, i.e. one that includes the leading
812 slash and the query string, but is independent of proxy
814 char *pth = url_full_path (u);
815 wwwauth = create_authorization_line (authenticate_h, user, passwd,
824 char *proxy_user, *proxy_passwd;
825 /* For normal username and password, URL components override
826 command-line/wgetrc parameters. With proxy authentication,
827 it's the reverse, because proxy URLs are normally the
828 "permanent" ones, so command-line args should take
830 if (opt.proxy_user && opt.proxy_passwd)
832 proxy_user = opt.proxy_user;
833 proxy_passwd = opt.proxy_passwd;
837 proxy_user = proxy->user;
838 proxy_passwd = proxy->passwd;
840 /* #### This does not appear right. Can't the proxy request,
841 say, `Digest' authentication? */
842 if (proxy_user && proxy_passwd)
843 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd,
844 "Proxy-Authorization");
847 /* String of the form :PORT. Used only for non-standard ports. */
849 if (u->port != scheme_default_port (u->scheme))
851 port_maybe = (char *)alloca (numdigit (u->port) + 2);
852 sprintf (port_maybe, ":%d", u->port);
855 if (!inhibit_keep_alive)
856 request_keep_alive = "Connection: Keep-Alive\r\n";
858 request_keep_alive = NULL;
861 cookies = cookie_header (wget_cookie_jar, u->host, u->port, u->path,
863 u->scheme == SCHEME_HTTPS
869 if (opt.post_data || opt.post_file_name)
871 post_content_type = "Content-Type: application/x-www-form-urlencoded\r\n";
873 post_data_size = strlen (opt.post_data);
876 post_data_size = file_size (opt.post_file_name);
877 if (post_data_size == -1)
879 logprintf (LOG_NOTQUIET, "POST data file missing: %s\n",
884 post_content_length = xmalloc (16 + numdigit (post_data_size) + 2 + 1);
885 sprintf (post_content_length,
886 "Content-Length: %ld\r\n", post_data_size);
890 full_path = xstrdup (u->url);
892 /* Use the full path, i.e. one that includes the leading slash and
893 the query string. E.g. if u->path is "foo/bar" and u->query is
894 "param=value", full_path will be "/foo/bar?param=value". */
895 full_path = url_full_path (u);
897 if (strchr (u->host, ':'))
898 squares_around_host = 1;
900 /* Allocate the memory for the request. */
901 request = (char *)alloca (strlen (command)
905 + (port_maybe ? strlen (port_maybe) : 0)
906 + strlen (HTTP_ACCEPT)
907 + (request_keep_alive
908 ? strlen (request_keep_alive) : 0)
909 + (referer ? strlen (referer) : 0)
910 + (cookies ? strlen (cookies) : 0)
911 + (wwwauth ? strlen (wwwauth) : 0)
912 + (proxyauth ? strlen (proxyauth) : 0)
913 + (range ? strlen (range) : 0)
916 ? strlen (post_content_type) : 0)
917 + (post_content_length
918 ? strlen (post_content_length) : 0)
919 + (opt.user_header ? strlen (opt.user_header) : 0)
921 /* Construct the request. */
927 %s%s%s%s%s%s%s%s%s%s\r\n",
930 squares_around_host ? "[" : "", u->host, squares_around_host ? "]" : "",
931 port_maybe ? port_maybe : "",
933 request_keep_alive ? request_keep_alive : "",
934 referer ? referer : "",
935 cookies ? cookies : "",
936 wwwauth ? wwwauth : "",
937 proxyauth ? proxyauth : "",
940 post_content_type ? post_content_type : "",
941 post_content_length ? post_content_length : "",
942 opt.user_header ? opt.user_header : "");
943 DEBUGP (("\n---request begin---\n%s", request));
945 /* Free the temporary memory. */
946 xfree_null (wwwauth);
947 xfree_null (proxyauth);
948 xfree_null (cookies);
951 /* Send the request to server. */
952 write_error = xwrite (sock, request, strlen (request), -1);
954 if (write_error >= 0)
958 DEBUGP (("[POST data: %s]\n", opt.post_data));
959 write_error = xwrite (sock, opt.post_data, post_data_size, -1);
961 else if (opt.post_file_name && post_data_size != 0)
962 write_error = post_file (sock, opt.post_file_name, post_data_size);
964 DEBUGP (("---request end---\n"));
968 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
970 CLOSE_INVALIDATE (sock);
973 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
974 proxy ? "Proxy" : "HTTP");
975 contlen = contrange = -1;
980 /* Before reading anything, initialize the rbuf. */
981 rbuf_initialize (&rbuf, sock);
985 DEBUGP (("\n---response begin---\n"));
987 /* Header-fetching loop. */
995 /* Get the header. */
996 status = header_get (&rbuf, &hdr,
997 /* Disallow continuations for status line. */
998 (hcount == 1 ? HG_NO_CONTINUATIONS : HG_NONE));
1000 /* Check for errors. */
1001 if (status == HG_EOF && *hdr)
1003 /* This used to be an unconditional error, but that was
1004 somewhat controversial, because of a large number of
1005 broken CGI's that happily "forget" to send the second EOL
1006 before closing the connection of a HEAD request.
1008 So, the deal is to check whether the header is empty
1009 (*hdr is zero if it is); if yes, it means that the
1010 previous header was fully retrieved, and that -- most
1011 probably -- the request is complete. "...be liberal in
1012 what you accept." Oh boy. */
1013 logputs (LOG_VERBOSE, "\n");
1014 logputs (LOG_NOTQUIET, _("End of file while parsing headers.\n"));
1017 xfree_null (all_headers);
1018 CLOSE_INVALIDATE (sock);
1021 else if (status == HG_ERROR)
1023 logputs (LOG_VERBOSE, "\n");
1024 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1028 xfree_null (all_headers);
1029 CLOSE_INVALIDATE (sock);
1033 /* If the headers are to be saved to a file later, save them to
1035 if (opt.save_headers)
1037 int lh = strlen (hdr);
1038 all_headers = (char *)xrealloc (all_headers, all_length + lh + 2);
1039 memcpy (all_headers + all_length, hdr, lh);
1041 all_headers[all_length++] = '\n';
1042 all_headers[all_length] = '\0';
1045 /* Check for status line. */
1049 /* Parse the first line of server response. */
1050 statcode = parse_http_status_line (hdr, &error);
1051 hs->statcode = statcode;
1052 /* Store the descriptive response. */
1053 if (statcode == -1) /* malformed response */
1055 /* A common reason for "malformed response" error is the
1056 case when no data was actually received. Handle this
1059 hs->error = xstrdup (_("No data received"));
1061 hs->error = xstrdup (_("Malformed status line"));
1066 hs->error = xstrdup (_("(no description)"));
1068 hs->error = xstrdup (error);
1070 if ((statcode != -1)
1076 if (opt.server_response)
1077 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1079 logprintf (LOG_VERBOSE, "%2d %s", statcode, error);
1085 /* Exit on empty header. */
1092 /* Print the header if requested. */
1093 if (opt.server_response && hcount != 1)
1094 logprintf (LOG_VERBOSE, "\n%2d %s", hcount, hdr);
1096 /* Try getting content-length. */
1097 if (contlen == -1 && !opt.ignore_length)
1098 if (header_process (hdr, "Content-Length", header_extract_number,
1101 /* Try getting content-type. */
1103 if (header_process (hdr, "Content-Type", http_process_type, &type))
1105 /* Try getting location. */
1107 if (header_process (hdr, "Location", header_strdup, &hs->newloc))
1109 /* Try getting last-modified. */
1110 if (!hs->remote_time)
1111 if (header_process (hdr, "Last-Modified", header_strdup,
1114 /* Try getting cookies. */
1116 if (header_process (hdr, "Set-Cookie", http_process_set_cookie, u))
1118 /* Try getting www-authentication. */
1119 if (!authenticate_h)
1120 if (header_process (hdr, "WWW-Authenticate", header_strdup,
1123 /* Check for accept-ranges header. If it contains the word
1124 `none', disable the ranges. */
1125 if (*dt & ACCEPTRANGES)
1128 if (header_process (hdr, "Accept-Ranges", http_process_none, &nonep))
1131 *dt &= ~ACCEPTRANGES;
1135 /* Try getting content-range. */
1136 if (contrange == -1)
1138 struct http_process_range_closure closure;
1139 if (header_process (hdr, "Content-Range", http_process_range, &closure))
1141 contrange = closure.first_byte_pos;
1145 /* Check for keep-alive related responses. */
1146 if (!inhibit_keep_alive)
1148 /* Check for the `Keep-Alive' header. */
1149 if (!http_keep_alive_1)
1151 if (header_process (hdr, "Keep-Alive", header_exists,
1152 &http_keep_alive_1))
1155 /* Check for `Connection: Keep-Alive'. */
1156 if (!http_keep_alive_2)
1158 if (header_process (hdr, "Connection", http_process_connection,
1159 &http_keep_alive_2))
1166 DEBUGP (("---response end---\n"));
1168 logputs (LOG_VERBOSE, "\n");
1171 && (http_keep_alive_1 || http_keep_alive_2))
1173 assert (inhibit_keep_alive == 0);
1177 /* The server has promised that it will not close the connection
1178 when we're done. This means that we can register it. */
1179 register_persistent (conn->host, conn->port, sock, using_ssl);
1181 if ((statcode == HTTP_STATUS_UNAUTHORIZED)
1184 /* Authorization is required. */
1188 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1189 might be more bytes in the body. */
1190 if (auth_tried_already)
1192 /* If we have tried it already, then there is not point
1195 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1196 xfree (authenticate_h);
1199 else if (!known_authentication_scheme_p (authenticate_h))
1201 xfree (authenticate_h);
1202 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1205 else if (BEGINS_WITH (authenticate_h, "Basic"))
1207 /* The authentication scheme is basic, the one we try by
1208 default, and it failed. There's no sense in trying
1214 auth_tried_already = 1;
1218 /* We do not need this anymore. */
1221 xfree (authenticate_h);
1222 authenticate_h = NULL;
1225 /* 20x responses are counted among successful by default. */
1226 if (H_20X (statcode))
1229 /* Return if redirected. */
1230 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1232 /* RFC2068 says that in case of the 300 (multiple choices)
1233 response, the server can output a preferred URL through
1234 `Location' header; otherwise, the request should be treated
1235 like GET. So, if the location is set, it will be a
1236 redirection; otherwise, just proceed normally. */
1237 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1241 logprintf (LOG_VERBOSE,
1242 _("Location: %s%s\n"),
1243 hs->newloc ? hs->newloc : _("unspecified"),
1244 hs->newloc ? _(" [following]") : "");
1245 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1246 might be more bytes in the body. */
1248 xfree_null (all_headers);
1253 /* If content-type is not given, assume text/html. This is because
1254 of the multitude of broken CGI's that "forget" to generate the
1257 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1258 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1263 if (opt.html_extension && (*dt & TEXTHTML))
1264 /* -E / --html-extension / html_extension = on was specified, and this is a
1265 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1266 already the file's suffix, tack on ".html". */
1268 char* last_period_in_local_filename = strrchr(*hs->local_file, '.');
1270 if (last_period_in_local_filename == NULL
1271 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1272 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1274 size_t local_filename_len = strlen(*hs->local_file);
1276 *hs->local_file = xrealloc(*hs->local_file,
1277 local_filename_len + sizeof(".html"));
1278 strcpy(*hs->local_file + local_filename_len, ".html");
1280 *dt |= ADDED_HTML_EXTENSION;
1284 if (contrange == -1)
1286 /* We did not get a content-range header. This means that the
1287 server did not honor our `Range' request. Normally, this
1288 means we should reset hs->restval and continue normally. */
1290 /* However, if `-c' is used, we need to be a bit more careful:
1292 1. If `-c' is specified and the file already existed when
1293 Wget was started, it would be a bad idea for us to start
1294 downloading it from scratch, effectively truncating it. I
1295 believe this cannot happen unless `-c' was specified.
1297 2. If `-c' is used on a file that is already fully
1298 downloaded, we're requesting bytes after the end of file,
1299 which can result in server not honoring `Range'. If this is
1300 the case, `Content-Length' will be equal to the length of the
1302 if (opt.always_rest)
1304 /* Check for condition #2. */
1305 if (hs->restval > 0 /* restart was requested. */
1306 && contlen != -1 /* we got content-length. */
1307 && hs->restval >= contlen /* file fully downloaded
1311 logputs (LOG_VERBOSE, _("\
1312 \n The file is already fully retrieved; nothing to do.\n\n"));
1313 /* In case the caller inspects. */
1316 /* Mark as successfully retrieved. */
1319 xfree_null (all_headers);
1320 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1321 might be more bytes in the body. */
1322 return RETRUNNEEDED;
1325 /* Check for condition #1. */
1326 if (hs->no_truncate)
1328 logprintf (LOG_NOTQUIET,
1331 Continued download failed on this file, which conflicts with `-c'.\n\
1332 Refusing to truncate existing file `%s'.\n\n"), *hs->local_file);
1334 xfree_null (all_headers);
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 xfree_null (all_headers);
1351 CLOSE_INVALIDATE (sock);
1358 contlen += contrange;
1360 contrange = -1; /* If conent-length was not sent,
1361 content-range will be ignored. */
1363 hs->contlen = contlen;
1367 if ((*dt & RETROKF) && !opt.server_response)
1369 /* No need to print this output if the body won't be
1370 downloaded at all, or if the original server response is
1372 logputs (LOG_VERBOSE, _("Length: "));
1375 logputs (LOG_VERBOSE, legible (contlen));
1376 if (contrange != -1)
1377 logprintf (LOG_VERBOSE, _(" (%s to go)"),
1378 legible (contlen - contrange));
1381 logputs (LOG_VERBOSE,
1382 opt.ignore_length ? _("ignored") : _("unspecified"));
1384 logprintf (LOG_VERBOSE, " [%s]\n", type);
1386 logputs (LOG_VERBOSE, "\n");
1390 type = NULL; /* We don't need it any more. */
1392 /* Return if we have no intention of further downloading. */
1393 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
1395 /* In case the caller cares to look... */
1399 xfree_null (all_headers);
1400 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1401 might be more bytes in the body. */
1402 return RETRFINISHED;
1405 /* Open the local file. */
1408 mkalldirs (*hs->local_file);
1410 rotate_backups (*hs->local_file);
1411 fp = fopen (*hs->local_file, hs->restval ? "ab" : "wb");
1414 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1415 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1416 might be more bytes in the body. */
1417 xfree_null (all_headers);
1423 extern int global_download_count;
1425 /* To ensure that repeated "from scratch" downloads work for -O
1426 files, we rewind the file pointer, unless restval is
1427 non-zero. (This works only when -O is used on regular files,
1428 but it's still a valuable feature.)
1430 However, this loses when more than one URL is specified on
1431 the command line the second rewinds eradicates the contents
1432 of the first download. Thus we disable the above trick for
1433 all the downloads except the very first one.
1435 #### A possible solution to this would be to remember the
1436 file position in the output document and to seek to that
1437 position, instead of rewinding.
1439 We don't truncate stdout, since that breaks
1440 "wget -O - [...] >> foo".
1442 if (!hs->restval && global_download_count == 0 && opt.dfp != stdout)
1444 /* This will silently fail for streams that don't correspond
1445 to regular files, but that's OK. */
1447 /* ftruncate is needed because opt.dfp is opened in append
1448 mode if opt.always_rest is set. */
1449 ftruncate (fileno (fp), 0);
1454 /* #### This confuses the code that checks for file size. There
1455 should be some overhead information. */
1456 if (opt.save_headers)
1457 fwrite (all_headers, 1, all_length, fp);
1459 /* Get the contents of the document. */
1460 hs->res = get_contents (sock, fp, &hs->len, hs->restval,
1461 (contlen != -1 ? contlen : 0),
1462 &rbuf, keep_alive, &hs->dltime);
1465 CLOSE_FINISH (sock);
1467 CLOSE_INVALIDATE (sock);
1470 /* Close or flush the file. We have to be careful to check for
1471 error here. Checking the result of fwrite() is not enough --
1472 errors could go unnoticed! */
1475 flush_res = fclose (fp);
1477 flush_res = fflush (fp);
1478 if (flush_res == EOF)
1481 xfree_null (all_headers);
1484 return RETRFINISHED;
1487 /* The genuine HTTP loop! This is the part where the retrieval is
1488 retried, and retried, and retried, and... */
1490 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1491 int *dt, struct url *proxy)
1494 int use_ts, got_head = 0; /* time-stamping info */
1495 char *filename_plus_orig_suffix;
1496 char *local_filename = NULL;
1497 char *tms, *locf, *tmrate;
1499 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1500 long local_size = 0; /* the size of the local file */
1501 size_t filename_len;
1502 struct http_stat hstat; /* HTTP status */
1506 /* This used to be done in main(), but it's a better idea to do it
1507 here so that we don't go through the hoops if we're just using
1511 if (!wget_cookie_jar)
1512 wget_cookie_jar = cookie_jar_new ();
1513 if (opt.cookies_input && !cookies_loaded_p)
1515 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
1516 cookies_loaded_p = 1;
1522 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
1523 has_wildcards_p because it would also warn on `?', and we know that
1524 shows up in CGI paths a *lot*. */
1525 if (strchr (u->url, '*'))
1526 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
1528 /* Determine the local filename. */
1529 if (local_file && *local_file)
1530 hstat.local_file = local_file;
1531 else if (local_file)
1533 *local_file = url_file_name (u);
1534 hstat.local_file = local_file;
1538 dummy = url_file_name (u);
1539 hstat.local_file = &dummy;
1542 if (!opt.output_document)
1543 locf = *hstat.local_file;
1545 locf = opt.output_document;
1547 hstat.referer = referer;
1549 filename_len = strlen (*hstat.local_file);
1550 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1552 if (opt.noclobber && file_exists_p (*hstat.local_file))
1554 /* If opt.noclobber is turned on and file already exists, do not
1555 retrieve the file */
1556 logprintf (LOG_VERBOSE, _("\
1557 File `%s' already there, will not retrieve.\n"), *hstat.local_file);
1558 /* If the file is there, we suppose it's retrieved OK. */
1561 /* #### Bogusness alert. */
1562 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1563 if (has_html_suffix_p (*hstat.local_file))
1571 if (opt.timestamping)
1573 int local_dot_orig_file_exists = 0;
1575 if (opt.backup_converted)
1576 /* If -K is specified, we'll act on the assumption that it was specified
1577 last time these files were downloaded as well, and instead of just
1578 comparing local file X against server file X, we'll compare local
1579 file X.orig (if extant, else X) against server file X. If -K
1580 _wasn't_ specified last time, or the server contains files called
1581 *.orig, -N will be back to not operating correctly with -k. */
1583 /* Would a single s[n]printf() call be faster? --dan
1585 Definitely not. sprintf() is horribly slow. It's a
1586 different question whether the difference between the two
1587 affects a program. Usually I'd say "no", but at one
1588 point I profiled Wget, and found that a measurable and
1589 non-negligible amount of time was lost calling sprintf()
1590 in url.c. Replacing sprintf with inline calls to
1591 strcpy() and long_to_string() made a difference.
1593 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
1594 memcpy (filename_plus_orig_suffix + filename_len,
1595 ".orig", sizeof (".orig"));
1597 /* Try to stat() the .orig file. */
1598 if (stat (filename_plus_orig_suffix, &st) == 0)
1600 local_dot_orig_file_exists = 1;
1601 local_filename = filename_plus_orig_suffix;
1605 if (!local_dot_orig_file_exists)
1606 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1607 if (stat (*hstat.local_file, &st) == 0)
1608 local_filename = *hstat.local_file;
1610 if (local_filename != NULL)
1611 /* There was a local file, so we'll check later to see if the version
1612 the server has is the same version we already have, allowing us to
1618 /* Modification time granularity is 2 seconds for Windows, so
1619 increase local time by 1 second for later comparison. */
1622 local_size = st.st_size;
1626 /* Reset the counter. */
1628 *dt = 0 | ACCEPTRANGES;
1632 /* Increment the pass counter. */
1634 sleep_between_retrievals (count);
1635 /* Get the current time string. */
1636 tms = time_str (NULL);
1637 /* Print fetch message, if opt.verbose. */
1640 char *hurl = url_string (u, 1);
1644 sprintf (tmp, _("(try:%2d)"), count);
1645 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1646 tms, hurl, tmp, locf);
1648 ws_changetitle (hurl, 1);
1653 /* Default document type is empty. However, if spider mode is
1654 on or time-stamping is employed, HEAD_ONLY commands is
1655 encoded within *dt. */
1656 if (opt.spider || (use_ts && !got_head))
1660 /* Assume no restarting. */
1662 /* Decide whether or not to restart. */
1663 if (((count > 1 && (*dt & ACCEPTRANGES)) || opt.always_rest)
1664 /* #### this calls access() and then stat(); could be optimized. */
1665 && file_exists_p (locf))
1666 if (stat (locf, &st) == 0 && S_ISREG (st.st_mode))
1667 hstat.restval = st.st_size;
1669 /* In `-c' is used and the file is existing and non-empty,
1670 refuse to truncate it if the server doesn't support continued
1672 hstat.no_truncate = 0;
1673 if (opt.always_rest && hstat.restval)
1674 hstat.no_truncate = 1;
1676 /* Decide whether to send the no-cache directive. We send it in
1678 a) we're using a proxy, and we're past our first retrieval.
1679 Some proxies are notorious for caching incomplete data, so
1680 we require a fresh get.
1681 b) caching is explicitly inhibited. */
1682 if ((proxy && count > 1) /* a */
1683 || !opt.allow_cache /* b */
1685 *dt |= SEND_NOCACHE;
1687 *dt &= ~SEND_NOCACHE;
1689 /* Try fetching the document, or at least its head. */
1690 err = gethttp (u, &hstat, dt, proxy);
1692 /* It's unfortunate that wget determines the local filename before finding
1693 out the Content-Type of the file. Barring a major restructuring of the
1694 code, we need to re-set locf here, since gethttp() may have xrealloc()d
1695 *hstat.local_file to tack on ".html". */
1696 if (!opt.output_document)
1697 locf = *hstat.local_file;
1699 locf = opt.output_document;
1702 tms = time_str (NULL);
1703 /* Get the new location (with or without the redirection). */
1705 *newloc = xstrdup (hstat.newloc);
1708 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
1709 case CONERROR: case READERR: case WRITEFAILED:
1711 /* Non-fatal errors continue executing the loop, which will
1712 bring them to "while" statement at the end, to judge
1713 whether the number of tries was exceeded. */
1714 free_hstat (&hstat);
1715 printwhat (count, opt.ntry);
1718 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
1719 case SSLERRCTXCREATE: case CONTNOTSUPPORTED:
1720 /* Fatal errors just return from the function. */
1721 free_hstat (&hstat);
1725 case FWRITEERR: case FOPENERR:
1726 /* Another fatal error. */
1727 logputs (LOG_VERBOSE, "\n");
1728 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
1729 *hstat.local_file, strerror (errno));
1730 free_hstat (&hstat);
1735 /* Another fatal error. */
1736 logputs (LOG_VERBOSE, "\n");
1737 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
1738 free_hstat (&hstat);
1743 /* Return the new location to the caller. */
1746 logprintf (LOG_NOTQUIET,
1747 _("ERROR: Redirection (%d) without location.\n"),
1749 free_hstat (&hstat);
1753 free_hstat (&hstat);
1758 /* The file was already fully retrieved. */
1759 free_hstat (&hstat);
1764 /* Deal with you later. */
1767 /* All possibilities should have been exhausted. */
1770 if (!(*dt & RETROKF))
1774 /* #### Ugly ugly ugly! */
1775 char *hurl = url_string (u, 1);
1776 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
1779 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
1780 tms, hstat.statcode, hstat.error);
1781 logputs (LOG_VERBOSE, "\n");
1782 free_hstat (&hstat);
1787 /* Did we get the time-stamp? */
1790 if (opt.timestamping && !hstat.remote_time)
1792 logputs (LOG_NOTQUIET, _("\
1793 Last-modified header missing -- time-stamps turned off.\n"));
1795 else if (hstat.remote_time)
1797 /* Convert the date-string into struct tm. */
1798 tmr = http_atotm (hstat.remote_time);
1799 if (tmr == (time_t) (-1))
1800 logputs (LOG_VERBOSE, _("\
1801 Last-modified header invalid -- time-stamp ignored.\n"));
1805 /* The time-stamping section. */
1810 use_ts = 0; /* no more time-stamping */
1811 count = 0; /* the retrieve count for HEAD is
1813 if (hstat.remote_time && tmr != (time_t) (-1))
1815 /* Now time-stamping can be used validly. Time-stamping
1816 means that if the sizes of the local and remote file
1817 match, and local file is newer than the remote file,
1818 it will not be retrieved. Otherwise, the normal
1819 download procedure is resumed. */
1821 (hstat.contlen == -1 || local_size == hstat.contlen))
1823 logprintf (LOG_VERBOSE, _("\
1824 Server file no newer than local file `%s' -- not retrieving.\n\n"),
1826 free_hstat (&hstat);
1830 else if (tml >= tmr)
1831 logprintf (LOG_VERBOSE, _("\
1832 The sizes do not match (local %ld) -- retrieving.\n"), local_size);
1834 logputs (LOG_VERBOSE,
1835 _("Remote file is newer, retrieving.\n"));
1837 free_hstat (&hstat);
1840 if ((tmr != (time_t) (-1))
1842 && ((hstat.len == hstat.contlen) ||
1843 ((hstat.res == 0) &&
1844 ((hstat.contlen == -1) ||
1845 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
1847 /* #### This code repeats in http.c and ftp.c. Move it to a
1849 const char *fl = NULL;
1850 if (opt.output_document)
1852 if (opt.od_known_regular)
1853 fl = opt.output_document;
1856 fl = *hstat.local_file;
1860 /* End of time-stamping section. */
1864 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode, hstat.error);
1869 tmrate = retr_rate (hstat.len - hstat.restval, hstat.dltime, 0);
1871 if (hstat.len == hstat.contlen)
1875 logprintf (LOG_VERBOSE,
1876 _("%s (%s) - `%s' saved [%ld/%ld]\n\n"),
1877 tms, tmrate, locf, hstat.len, hstat.contlen);
1878 logprintf (LOG_NONVERBOSE,
1879 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1880 tms, u->url, hstat.len, hstat.contlen, locf, count);
1883 total_downloaded_bytes += hstat.len;
1885 /* Remember that we downloaded the file for later ".orig" code. */
1886 if (*dt & ADDED_HTML_EXTENSION)
1887 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1889 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1891 free_hstat (&hstat);
1895 else if (hstat.res == 0) /* No read error */
1897 if (hstat.contlen == -1) /* We don't know how much we were supposed
1898 to get, so assume we succeeded. */
1902 logprintf (LOG_VERBOSE,
1903 _("%s (%s) - `%s' saved [%ld]\n\n"),
1904 tms, tmrate, locf, hstat.len);
1905 logprintf (LOG_NONVERBOSE,
1906 "%s URL:%s [%ld] -> \"%s\" [%d]\n",
1907 tms, u->url, hstat.len, locf, count);
1910 total_downloaded_bytes += hstat.len;
1912 /* Remember that we downloaded the file for later ".orig" code. */
1913 if (*dt & ADDED_HTML_EXTENSION)
1914 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1916 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1918 free_hstat (&hstat);
1922 else if (hstat.len < hstat.contlen) /* meaning we lost the
1923 connection too soon */
1925 logprintf (LOG_VERBOSE,
1926 _("%s (%s) - Connection closed at byte %ld. "),
1927 tms, tmrate, hstat.len);
1928 printwhat (count, opt.ntry);
1929 free_hstat (&hstat);
1932 else if (!opt.kill_longer) /* meaning we got more than expected */
1934 logprintf (LOG_VERBOSE,
1935 _("%s (%s) - `%s' saved [%ld/%ld])\n\n"),
1936 tms, tmrate, locf, hstat.len, hstat.contlen);
1937 logprintf (LOG_NONVERBOSE,
1938 "%s URL:%s [%ld/%ld] -> \"%s\" [%d]\n",
1939 tms, u->url, hstat.len, hstat.contlen, locf, count);
1941 total_downloaded_bytes += hstat.len;
1943 /* Remember that we downloaded the file for later ".orig" code. */
1944 if (*dt & ADDED_HTML_EXTENSION)
1945 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
1947 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
1949 free_hstat (&hstat);
1953 else /* the same, but not accepted */
1955 logprintf (LOG_VERBOSE,
1956 _("%s (%s) - Connection closed at byte %ld/%ld. "),
1957 tms, tmrate, hstat.len, hstat.contlen);
1958 printwhat (count, opt.ntry);
1959 free_hstat (&hstat);
1963 else /* now hstat.res can only be -1 */
1965 if (hstat.contlen == -1)
1967 logprintf (LOG_VERBOSE,
1968 _("%s (%s) - Read error at byte %ld (%s)."),
1969 tms, tmrate, hstat.len, strerror (errno));
1970 printwhat (count, opt.ntry);
1971 free_hstat (&hstat);
1974 else /* hstat.res == -1 and contlen is given */
1976 logprintf (LOG_VERBOSE,
1977 _("%s (%s) - Read error at byte %ld/%ld (%s). "),
1978 tms, tmrate, hstat.len, hstat.contlen,
1980 printwhat (count, opt.ntry);
1981 free_hstat (&hstat);
1988 while (!opt.ntry || (count < opt.ntry));
1992 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
1993 than local timezone.
1995 mktime is similar but assumes struct tm, also known as the
1996 "broken-down" form of time, is in local time zone. mktime_from_utc
1997 uses mktime to make the conversion understanding that an offset
1998 will be introduced by the local time assumption.
2000 mktime_from_utc then measures the introduced offset by applying
2001 gmtime to the initial result and applying mktime to the resulting
2002 "broken-down" form. The difference between the two mktime results
2003 is the measured offset which is then subtracted from the initial
2004 mktime result to yield a calendar time which is the value returned.
2006 tm_isdst in struct tm is set to 0 to force mktime to introduce a
2007 consistent offset (the non DST offset) since tm and tm+o might be
2008 on opposite sides of a DST change.
2010 Some implementations of mktime return -1 for the nonexistent
2011 localtime hour at the beginning of DST. In this event, use
2012 mktime(tm - 1hr) + 3600.
2016 gmtime(t+o) --> tm+o
2017 mktime(tm+o) --> t+2o
2018 t+o - (t+2o - t+o) = t
2020 Note that glibc contains a function of the same purpose named
2021 `timegm' (reverse of gmtime). But obviously, it is not universally
2022 available, and unfortunately it is not straightforwardly
2023 extractable for use here. Perhaps configure should detect timegm
2024 and use it where available.
2026 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
2027 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO.
2028 Further improved by Roger with assistance from Edward J. Sabol
2029 based on input by Jamie Zawinski. */
2032 mktime_from_utc (struct tm *t)
2043 return -1; /* can't deal with output from strptime */
2054 return -1; /* can't deal with output from gmtime */
2057 return (tl - (tb - tl));
2060 /* Check whether the result of strptime() indicates success.
2061 strptime() returns the pointer to how far it got to in the string.
2062 The processing has been successful if the string is at `GMT' or
2063 `+X', or at the end of the string.
2065 In extended regexp parlance, the function returns 1 if P matches
2066 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2067 can return) is considered a failure and 0 is returned. */
2069 check_end (const char *p)
2073 while (ISSPACE (*p))
2076 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2077 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2083 /* Convert the textual specification of time in TIME_STRING to the
2084 number of seconds since the Epoch.
2086 TIME_STRING can be in any of the three formats RFC2068 allows the
2087 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date.
2088 Timezones are ignored, and should be GMT.
2090 Return the computed time_t representation, or -1 if the conversion
2093 This function uses strptime with various string formats for parsing
2094 TIME_STRING. This results in a parser that is not as lenient in
2095 interpreting TIME_STRING as I would like it to be. Being based on
2096 strptime, it always allows shortened months, one-digit days, etc.,
2097 but due to the multitude of formats in which time can be
2098 represented, an ideal HTTP time parser would be even more
2099 forgiving. It should completely ignore things like week days and
2100 concentrate only on the various forms of representing years,
2101 months, days, hours, minutes, and seconds. For example, it would
2102 be nice if it accepted ISO 8601 out of the box.
2104 I've investigated free and PD code for this purpose, but none was
2105 usable. getdate was big and unwieldy, and had potential copyright
2106 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2107 distributed with phttpd, is excellent, but we cannot use it because
2108 it is not assigned to the FSF. So I stuck it with strptime. */
2111 http_atotm (const char *time_string)
2113 /* NOTE: Solaris strptime man page claims that %n and %t match white
2114 space, but that's not universally available. Instead, we simply
2115 use ` ' to mean "skip all WS", which works under all strptime
2116 implementations I've tested. */
2118 static const char *time_formats[] = {
2119 "%a, %d %b %Y %T", /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
2120 "%A, %d-%b-%y %T", /* RFC850: Thursday, 29-Jan-98 22:12:57 */
2121 "%a, %d-%b-%Y %T", /* pseudo-RFC850: Thu, 29-Jan-1998 22:12:57
2122 (google.com uses this for their cookies.) */
2123 "%a %b %d %T %Y" /* asctime: Thu Jan 29 22:12:57 1998 */
2129 /* According to Roger Beeman, we need to initialize tm_isdst, since
2130 strptime won't do it. */
2133 /* Note that under foreign locales Solaris strptime() fails to
2134 recognize English dates, which renders this function useless. We
2135 solve this by being careful not to affect LC_TIME when
2136 initializing locale.
2138 Another solution would be to temporarily set locale to C, invoke
2139 strptime(), and restore it back. This is slow and dirty,
2140 however, and locale support other than LC_MESSAGES can mess other
2141 things, so I rather chose to stick with just setting LC_MESSAGES.
2143 GNU strptime does not have this problem because it recognizes
2144 both international and local dates. */
2146 for (i = 0; i < countof (time_formats); i++)
2147 if (check_end (strptime (time_string, time_formats[i], &t)))
2148 return mktime_from_utc (&t);
2150 /* All formats have failed. */
2154 /* Authorization support: We support two authorization schemes:
2156 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2158 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2159 consisting of answering to the server's challenge with the proper
2162 /* How many bytes it will take to store LEN bytes in base64. */
2163 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
2165 /* Encode the string S of length LENGTH to base64 format and place it
2166 to STORE. STORE will be 0-terminated, and must point to a writable
2167 buffer of at least 1+BASE64_LENGTH(length) bytes. */
2169 base64_encode (const char *s, char *store, int length)
2171 /* Conversion table. */
2172 static char tbl[64] = {
2173 'A','B','C','D','E','F','G','H',
2174 'I','J','K','L','M','N','O','P',
2175 'Q','R','S','T','U','V','W','X',
2176 'Y','Z','a','b','c','d','e','f',
2177 'g','h','i','j','k','l','m','n',
2178 'o','p','q','r','s','t','u','v',
2179 'w','x','y','z','0','1','2','3',
2180 '4','5','6','7','8','9','+','/'
2183 unsigned char *p = (unsigned char *)store;
2185 /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
2186 for (i = 0; i < length; i += 3)
2188 *p++ = tbl[s[0] >> 2];
2189 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
2190 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
2191 *p++ = tbl[s[2] & 0x3f];
2194 /* Pad the result if necessary... */
2195 if (i == length + 1)
2197 else if (i == length + 2)
2198 *(p - 1) = *(p - 2) = '=';
2199 /* ...and zero-terminate it. */
2203 /* Create the authentication header contents for the `Basic' scheme.
2204 This is done by encoding the string `USER:PASS' in base64 and
2205 prepending `HEADER: Basic ' to it. */
2207 basic_authentication_encode (const char *user, const char *passwd,
2210 char *t1, *t2, *res;
2211 int len1 = strlen (user) + 1 + strlen (passwd);
2212 int len2 = BASE64_LENGTH (len1);
2214 t1 = (char *)alloca (len1 + 1);
2215 sprintf (t1, "%s:%s", user, passwd);
2216 t2 = (char *)alloca (1 + len2);
2217 base64_encode (t1, t2, len1);
2218 res = (char *)xmalloc (len2 + 11 + strlen (header));
2219 sprintf (res, "%s: Basic %s\r\n", header, t2);
2225 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2226 of a field in such a header. If the field is the one specified by
2227 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2228 digest authorization code), extract its value in the (char*)
2229 variable pointed by RET. Returns negative on a malformed header,
2230 or number of bytes that have been parsed by this call. */
2232 extract_header_attr (const char *au, const char *attr_name, char **ret)
2234 const char *cp, *ep;
2238 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2240 cp += strlen (attr_name);
2243 cp += skip_lws (cp);
2248 cp += skip_lws (cp);
2253 for (ep = cp; *ep && *ep != '\"'; ep++)
2258 *ret = strdupdelim (cp, ep);
2265 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2266 an array of 16 bytes containing the hash keys, and BUF should be a
2267 buffer of 33 writable characters (32 for hex digits plus one for
2268 zero termination). */
2270 dump_hash (unsigned char *buf, const unsigned char *hash)
2274 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2276 *buf++ = XNUM_TO_digit (*hash >> 4);
2277 *buf++ = XNUM_TO_digit (*hash & 0xf);
2282 /* Take the line apart to find the challenge, and compose a digest
2283 authorization header. See RFC2069 section 2.1.2. */
2285 digest_authentication_encode (const char *au, const char *user,
2286 const char *passwd, const char *method,
2289 static char *realm, *opaque, *nonce;
2294 { "realm", &realm },
2295 { "opaque", &opaque },
2300 realm = opaque = nonce = NULL;
2302 au += 6; /* skip over `Digest' */
2307 au += skip_lws (au);
2308 for (i = 0; i < countof (options); i++)
2310 int skip = extract_header_attr (au, options[i].name,
2311 options[i].variable);
2315 xfree_null (opaque);
2325 if (i == countof (options))
2327 while (*au && *au != '=')
2331 au += skip_lws (au);
2335 while (*au && *au != '\"')
2342 while (*au && *au != ',')
2347 if (!realm || !nonce || !user || !passwd || !path || !method)
2350 xfree_null (opaque);
2355 /* Calculate the digest value. */
2357 ALLOCA_MD5_CONTEXT (ctx);
2358 unsigned char hash[MD5_HASHLEN];
2359 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2360 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
2362 /* A1BUF = H(user ":" realm ":" password) */
2364 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2365 gen_md5_update ((unsigned char *)":", 1, ctx);
2366 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2367 gen_md5_update ((unsigned char *)":", 1, ctx);
2368 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2369 gen_md5_finish (ctx, hash);
2370 dump_hash (a1buf, hash);
2372 /* A2BUF = H(method ":" path) */
2374 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2375 gen_md5_update ((unsigned char *)":", 1, ctx);
2376 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2377 gen_md5_finish (ctx, hash);
2378 dump_hash (a2buf, hash);
2380 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2382 gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
2383 gen_md5_update ((unsigned char *)":", 1, ctx);
2384 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2385 gen_md5_update ((unsigned char *)":", 1, ctx);
2386 gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
2387 gen_md5_finish (ctx, hash);
2388 dump_hash (response_digest, hash);
2390 res = (char*) xmalloc (strlen (user)
2395 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2396 + (opaque ? strlen (opaque) : 0)
2398 sprintf (res, "Authorization: Digest \
2399 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2400 user, realm, nonce, path, response_digest);
2403 char *p = res + strlen (res);
2404 strcat (p, ", opaque=\"");
2408 strcat (res, "\r\n");
2412 #endif /* USE_DIGEST */
2415 #define BEGINS_WITH(line, string_constant) \
2416 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
2417 && (ISSPACE (line[sizeof (string_constant) - 1]) \
2418 || !line[sizeof (string_constant) - 1]))
2421 known_authentication_scheme_p (const char *au)
2423 return BEGINS_WITH (au, "Basic")
2424 || BEGINS_WITH (au, "Digest")
2425 || BEGINS_WITH (au, "NTLM");
2430 /* Create the HTTP authorization request header. When the
2431 `WWW-Authenticate' response header is seen, according to the
2432 authorization scheme specified in that header (`Basic' and `Digest'
2433 are supported by the current implementation), produce an
2434 appropriate HTTP authorization request header. */
2436 create_authorization_line (const char *au, const char *user,
2437 const char *passwd, const char *method,
2440 char *wwwauth = NULL;
2442 if (!strncasecmp (au, "Basic", 5))
2443 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2444 if (!strncasecmp (au, "NTLM", 4))
2445 wwwauth = basic_authentication_encode (user, passwd, "Authorization");
2447 else if (!strncasecmp (au, "Digest", 6))
2448 wwwauth = digest_authentication_encode (au, user, passwd, method, path);
2449 #endif /* USE_DIGEST */