2 Copyright (C) 2005 Free Software Foundation, Inc.
4 This file is part of GNU Wget.
6 GNU Wget is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 GNU Wget is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Wget; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
34 #include <sys/types.h>
45 #if TIME_WITH_SYS_TIME
46 # include <sys/time.h>
50 # include <sys/time.h>
67 # include "gen_sslfunc.h"
70 # include "http-ntlm.h"
78 extern char *version_string;
79 extern LARGE_INT total_downloaded_bytes;
81 extern FILE *output_stream;
82 extern int output_stream_regular;
85 # define MIN(x, y) ((x) > (y) ? (y) : (x))
89 static int cookies_loaded_p;
90 static struct cookie_jar *wget_cookie_jar;
92 #define TEXTHTML_S "text/html"
93 #define TEXTXHTML_S "application/xhtml+xml"
95 /* Some status code validation macros: */
96 #define H_20X(x) (((x) >= 200) && ((x) < 300))
97 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
98 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
99 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
100 || (x) == HTTP_STATUS_SEE_OTHER \
101 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
103 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
104 /* Successful 2xx. */
105 #define HTTP_STATUS_OK 200
106 #define HTTP_STATUS_CREATED 201
107 #define HTTP_STATUS_ACCEPTED 202
108 #define HTTP_STATUS_NO_CONTENT 204
109 #define HTTP_STATUS_PARTIAL_CONTENTS 206
111 /* Redirection 3xx. */
112 #define HTTP_STATUS_MULTIPLE_CHOICES 300
113 #define HTTP_STATUS_MOVED_PERMANENTLY 301
114 #define HTTP_STATUS_MOVED_TEMPORARILY 302
115 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
116 #define HTTP_STATUS_NOT_MODIFIED 304
117 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
119 /* Client error 4xx. */
120 #define HTTP_STATUS_BAD_REQUEST 400
121 #define HTTP_STATUS_UNAUTHORIZED 401
122 #define HTTP_STATUS_FORBIDDEN 403
123 #define HTTP_STATUS_NOT_FOUND 404
124 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
126 /* Server errors 5xx. */
127 #define HTTP_STATUS_INTERNAL 500
128 #define HTTP_STATUS_NOT_IMPLEMENTED 501
129 #define HTTP_STATUS_BAD_GATEWAY 502
130 #define HTTP_STATUS_UNAVAILABLE 503
133 rel_none, rel_name, rel_value, rel_both
140 struct request_header {
142 enum rp release_policy;
144 int hcount, hcapacity;
147 /* Create a new, empty request. At least request_set_method must be
148 called before the request can be used. */
150 static struct request *
153 struct request *req = xnew0 (struct request);
155 req->headers = xnew_array (struct request_header, req->hcapacity);
159 /* Set the request's method and its arguments. METH should be a
160 literal string (or it should outlive the request) because it will
161 not be freed. ARG will be freed by request_free. */
164 request_set_method (struct request *req, const char *meth, char *arg)
170 /* Return the method string passed with the last call to
171 request_set_method. */
174 request_method (const struct request *req)
179 /* Free one header according to the release policy specified with
180 request_set_header. */
183 release_header (struct request_header *hdr)
185 switch (hdr->release_policy)
202 /* Set the request named NAME to VALUE. Specifically, this means that
203 a "NAME: VALUE\r\n" header line will be used in the request. If a
204 header with the same name previously existed in the request, its
205 value will be replaced by this one. A NULL value means do nothing.
207 RELEASE_POLICY determines whether NAME and VALUE should be released
208 (freed) with request_free. Allowed values are:
210 - rel_none - don't free NAME or VALUE
211 - rel_name - free NAME when done
212 - rel_value - free VALUE when done
213 - rel_both - free both NAME and VALUE when done
215 Setting release policy is useful when arguments come from different
216 sources. For example:
218 // Don't free literal strings!
219 request_set_header (req, "Pragma", "no-cache", rel_none);
221 // Don't free a global variable, we'll need it later.
222 request_set_header (req, "Referer", opt.referer, rel_none);
224 // Value freshly allocated, free it when done.
225 request_set_header (req, "Range",
226 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
231 request_set_header (struct request *req, char *name, char *value,
232 enum rp release_policy)
234 struct request_header *hdr;
239 /* A NULL value is a no-op; if freeing the name is requested,
240 free it now to avoid leaks. */
241 if (release_policy == rel_name || release_policy == rel_both)
246 for (i = 0; i < req->hcount; i++)
248 hdr = &req->headers[i];
249 if (0 == strcasecmp (name, hdr->name))
251 /* Replace existing header. */
252 release_header (hdr);
255 hdr->release_policy = release_policy;
260 /* Install new header. */
262 if (req->hcount >= req->hcapacity)
264 req->hcapacity <<= 1;
265 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
267 hdr = &req->headers[req->hcount++];
270 hdr->release_policy = release_policy;
273 /* Like request_set_header, but sets the whole header line, as
274 provided by the user using the `--header' option. For example,
275 request_set_user_header (req, "Foo: bar") works just like
276 request_set_header (req, "Foo", "bar"). */
279 request_set_user_header (struct request *req, const char *header)
282 const char *p = strchr (header, ':');
285 BOUNDED_TO_ALLOCA (header, p, name);
289 request_set_header (req, xstrdup (name), (char *) p, rel_name);
292 /* Remove the header with specified name from REQ. Returns 1 if the
293 header was actually removed, 0 otherwise. */
296 request_remove_header (struct request *req, char *name)
299 for (i = 0; i < req->hcount; i++)
301 struct request_header *hdr = &req->headers[i];
302 if (0 == strcasecmp (name, hdr->name))
304 release_header (hdr);
305 /* Move the remaining headers by one. */
306 if (i < req->hcount - 1)
307 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
315 #define APPEND(p, str) do { \
316 int A_len = strlen (str); \
317 memcpy (p, str, A_len); \
321 /* Construct the request and write it to FD using fd_write. */
324 request_send (const struct request *req, int fd)
326 char *request_string, *p;
327 int i, size, write_error;
329 /* Count the request size. */
332 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
333 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
335 for (i = 0; i < req->hcount; i++)
337 struct request_header *hdr = &req->headers[i];
338 /* NAME ": " VALUE "\r\n" */
339 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
345 p = request_string = alloca_array (char, size);
347 /* Generate the request. */
349 APPEND (p, req->method); *p++ = ' ';
350 APPEND (p, req->arg); *p++ = ' ';
351 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
353 for (i = 0; i < req->hcount; i++)
355 struct request_header *hdr = &req->headers[i];
356 APPEND (p, hdr->name);
357 *p++ = ':', *p++ = ' ';
358 APPEND (p, hdr->value);
359 *p++ = '\r', *p++ = '\n';
362 *p++ = '\r', *p++ = '\n', *p++ = '\0';
363 assert (p - request_string == size);
367 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
369 /* Send the request to the server. */
371 write_error = fd_write (fd, request_string, size - 1, -1);
373 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
378 /* Release the resources used by REQ. */
381 request_free (struct request *req)
384 xfree_null (req->arg);
385 for (i = 0; i < req->hcount; i++)
386 release_header (&req->headers[i]);
387 xfree_null (req->headers);
391 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
392 PROMISED_SIZE bytes are sent over the wire -- if the file is
393 longer, read only that much; if the file is shorter, report an error. */
396 post_file (int sock, const char *file_name, wgint promised_size)
398 static char chunk[8192];
403 DEBUGP (("[writing POST file %s ... ", file_name));
405 fp = fopen (file_name, "rb");
408 while (!feof (fp) && written < promised_size)
411 int length = fread (chunk, 1, sizeof (chunk), fp);
414 towrite = MIN (promised_size - written, length);
415 write_error = fd_write (sock, chunk, towrite, -1);
425 /* If we've written less than was promised, report a (probably
426 nonsensical) error rather than break the promise. */
427 if (written < promised_size)
433 assert (written == promised_size);
434 DEBUGP (("done]\n"));
439 response_head_terminator (const char *hunk, int oldlen, int peeklen)
441 const char *start, *end;
443 /* If at first peek, verify whether HUNK starts with "HTTP". If
444 not, this is a HTTP/0.9 request and we must bail out without
446 if (oldlen == 0 && 0 != memcmp (hunk, "HTTP", MIN (peeklen, 4)))
452 start = hunk + oldlen - 4;
453 end = hunk + oldlen + peeklen;
455 for (; start < end - 1; start++)
462 if (start[1] == '\n')
468 /* The maximum size of a single HTTP response we care to read. This
469 is not meant to impose an arbitrary limit, but to protect the user
470 from Wget slurping up available memory upon encountering malicious
471 or buggy server output. Define it to 0 to remove the limit. */
473 #define HTTP_RESPONSE_MAX_SIZE 65536
475 /* Read the HTTP request head from FD and return it. The error
476 conditions are the same as with fd_read_hunk.
478 To support HTTP/0.9 responses, this function tries to make sure
479 that the data begins with "HTTP". If this is not the case, no data
480 is read and an empty request is returned, so that the remaining
481 data can be treated as body. */
484 read_http_response_head (int fd)
486 return fd_read_hunk (fd, response_head_terminator, 512,
487 HTTP_RESPONSE_MAX_SIZE);
491 /* The response data. */
494 /* The array of pointers that indicate where each header starts.
495 For example, given this HTTP response:
502 The headers are located like this:
504 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
506 headers[0] headers[1] headers[2] headers[3]
508 I.e. headers[0] points to the beginning of the request,
509 headers[1] points to the end of the first header and the
510 beginning of the second one, etc. */
512 const char **headers;
515 /* Create a new response object from the text of the HTTP response,
516 available in HEAD. That text is automatically split into
517 constituent header lines for fast retrieval using
520 static struct response *
521 resp_new (const char *head)
526 struct response *resp = xnew0 (struct response);
531 /* Empty head means that we're dealing with a headerless
532 (HTTP/0.9) response. In that case, don't set HEADERS at
537 /* Split HEAD into header lines, so that resp_header_* functions
538 don't need to do this over and over again. */
544 DO_REALLOC (resp->headers, size, count + 1, const char *);
545 resp->headers[count++] = hdr;
547 /* Break upon encountering an empty line. */
548 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
551 /* Find the end of HDR, including continuations. */
554 const char *end = strchr (hdr, '\n');
560 while (*hdr == ' ' || *hdr == '\t');
562 DO_REALLOC (resp->headers, size, count + 1, const char *);
563 resp->headers[count] = NULL;
568 /* Locate the header named NAME in the request data, starting with
569 position START. This allows the code to loop through the request
570 data, filtering for all requests of a given name. Returns the
571 found position, or -1 for failure. The code that uses this
572 function typically looks like this:
574 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
575 ... do something with header ...
577 If you only care about one header, use resp_header_get instead of
581 resp_header_locate (const struct response *resp, const char *name, int start,
582 const char **begptr, const char **endptr)
585 const char **headers = resp->headers;
588 if (!headers || !headers[1])
591 name_len = strlen (name);
597 for (; headers[i + 1]; i++)
599 const char *b = headers[i];
600 const char *e = headers[i + 1];
602 && b[name_len] == ':'
603 && 0 == strncasecmp (b, name, name_len))
606 while (b < e && ISSPACE (*b))
608 while (b < e && ISSPACE (e[-1]))
618 /* Find and retrieve the header named NAME in the request data. If
619 found, set *BEGPTR to its starting, and *ENDPTR to its ending
620 position, and return 1. Otherwise return 0.
622 This function is used as a building block for resp_header_copy
623 and resp_header_strdup. */
626 resp_header_get (const struct response *resp, const char *name,
627 const char **begptr, const char **endptr)
629 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
633 /* Copy the response header named NAME to buffer BUF, no longer than
634 BUFSIZE (BUFSIZE includes the terminating 0). If the header
635 exists, 1 is returned, otherwise 0. If there should be no limit on
636 the size of the header, use resp_header_strdup instead.
638 If BUFSIZE is 0, no data is copied, but the boolean indication of
639 whether the header is present is still returned. */
642 resp_header_copy (const struct response *resp, const char *name,
643 char *buf, int bufsize)
646 if (!resp_header_get (resp, name, &b, &e))
650 int len = MIN (e - b, bufsize - 1);
651 memcpy (buf, b, len);
657 /* Return the value of header named NAME in RESP, allocated with
658 malloc. If such a header does not exist in RESP, return NULL. */
661 resp_header_strdup (const struct response *resp, const char *name)
664 if (!resp_header_get (resp, name, &b, &e))
666 return strdupdelim (b, e);
669 /* Parse the HTTP status line, which is of format:
671 HTTP-Version SP Status-Code SP Reason-Phrase
673 The function returns the status-code, or -1 if the status line
674 appears malformed. The pointer to "reason-phrase" message is
675 returned in *MESSAGE. */
678 resp_status (const struct response *resp, char **message)
685 /* For a HTTP/0.9 response, assume status 200. */
687 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
691 p = resp->headers[0];
692 end = resp->headers[1];
698 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
702 /* Match the HTTP version. This is optional because Gnutella
703 servers have been reported to not specify HTTP version. */
704 if (p < end && *p == '/')
707 while (p < end && ISDIGIT (*p))
709 if (p < end && *p == '.')
711 while (p < end && ISDIGIT (*p))
715 while (p < end && ISSPACE (*p))
717 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
720 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
725 while (p < end && ISSPACE (*p))
727 while (p < end && ISSPACE (end[-1]))
729 *message = strdupdelim (p, end);
735 /* Release the resources used by RESP. */
738 resp_free (struct response *resp)
740 xfree_null (resp->headers);
744 /* Print the server response, line by line, omitting the trailing CRLF
745 from individual header lines, and prefixed with PREFIX. */
748 print_server_response (const struct response *resp, const char *prefix)
753 for (i = 0; resp->headers[i + 1]; i++)
755 const char *b = resp->headers[i];
756 const char *e = resp->headers[i + 1];
758 if (b < e && e[-1] == '\n')
760 if (b < e && e[-1] == '\r')
762 /* This is safe even on printfs with broken handling of "%.<n>s"
763 because resp->headers ends with \0. */
764 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, e - b, b);
768 /* Parse the `Content-Range' header and extract the information it
769 contains. Returns 1 if successful, -1 otherwise. */
771 parse_content_range (const char *hdr, wgint *first_byte_ptr,
772 wgint *last_byte_ptr, wgint *entity_length_ptr)
776 /* Ancient versions of Netscape proxy server, presumably predating
777 rfc2068, sent out `Content-Range' without the "bytes"
779 if (!strncasecmp (hdr, "bytes", 5))
782 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
786 while (ISSPACE (*hdr))
793 for (num = 0; ISDIGIT (*hdr); hdr++)
794 num = 10 * num + (*hdr - '0');
795 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
797 *first_byte_ptr = num;
799 for (num = 0; ISDIGIT (*hdr); hdr++)
800 num = 10 * num + (*hdr - '0');
801 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
803 *last_byte_ptr = num;
805 for (num = 0; ISDIGIT (*hdr); hdr++)
806 num = 10 * num + (*hdr - '0');
807 *entity_length_ptr = num;
811 /* Read the body of the request, but don't store it anywhere and don't
812 display a progress gauge. This is useful for reading the bodies of
813 administrative responses to which we will soon issue another
814 request. The response is not useful to the user, but reading it
815 allows us to continue using the same connection to the server.
817 If reading fails, 0 is returned, non-zero otherwise. In debug
818 mode, the body is displayed for debugging purposes. */
821 skip_short_body (int fd, wgint contlen)
824 SKIP_SIZE = 512, /* size of the download buffer */
825 SKIP_THRESHOLD = 4096 /* the largest size we read */
827 char dlbuf[SKIP_SIZE + 1];
828 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
830 /* We shouldn't get here with unknown contlen. (This will change
831 with HTTP/1.1, which supports "chunked" transfer.) */
832 assert (contlen != -1);
834 /* If the body is too large, it makes more sense to simply close the
835 connection than to try to read the body. */
836 if (contlen > SKIP_THRESHOLD)
839 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
843 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
846 /* Don't normally report the error since this is an
847 optimization that should be invisible to the user. */
848 DEBUGP (("] aborting (%s).\n",
849 ret < 0 ? strerror (errno) : "EOF received"));
853 /* Safe even if %.*s bogusly expects terminating \0 because
854 we've zero-terminated dlbuf above. */
855 DEBUGP (("%.*s", ret, dlbuf));
858 DEBUGP (("] done.\n"));
862 /* Persistent connections. Currently, we cache the most recently used
863 connection as persistent, provided that the HTTP server agrees to
864 make it such. The persistence data is stored in the variables
865 below. Ideally, it should be possible to cache an arbitrary fixed
866 number of these connections. */
868 /* Whether a persistent connection is active. */
869 static int pconn_active;
872 /* The socket of the connection. */
875 /* Host and port of the currently active persistent connection. */
879 /* Whether a ssl handshake has occoured on this connection. */
882 /* Whether the connection was authorized. This is only done by
883 NTLM, which authorizes *connections* rather than individual
884 requests. (That practice is peculiar for HTTP, but it is a
885 useful optimization.) */
889 /* NTLM data of the current connection. */
890 struct ntlmdata ntlm;
894 /* Mark the persistent connection as invalid and free the resources it
895 uses. This is used by the CLOSE_* macros after they forcefully
896 close a registered persistent connection. */
899 invalidate_persistent (void)
901 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
903 fd_close (pconn.socket);
908 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
909 persistent. This will enable someone to use the same connection
910 later. In the context of HTTP, this must be called only AFTER the
911 response has been received and the server has promised that the
912 connection will remain alive.
914 If a previous connection was persistent, it is closed. */
917 register_persistent (const char *host, int port, int fd, int ssl)
921 if (pconn.socket == fd)
923 /* The connection FD is already registered. */
928 /* The old persistent connection is still active; close it
929 first. This situation arises whenever a persistent
930 connection exists, but we then connect to a different
931 host, and try to register a persistent connection to that
933 invalidate_persistent ();
939 pconn.host = xstrdup (host);
942 pconn.authorized = 0;
944 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
947 /* Return non-zero if a persistent connection is available for
948 connecting to HOST:PORT. */
951 persistent_available_p (const char *host, int port, int ssl,
952 int *host_lookup_failed)
954 /* First, check whether a persistent connection is active at all. */
958 /* If we want SSL and the last connection wasn't or vice versa,
959 don't use it. Checking for host and port is not enough because
960 HTTP and HTTPS can apparently coexist on the same port. */
961 if (ssl != pconn.ssl)
964 /* If we're not connecting to the same port, we're not interested. */
965 if (port != pconn.port)
968 /* If the host is the same, we're in business. If not, there is
969 still hope -- read below. */
970 if (0 != strcasecmp (host, pconn.host))
972 /* If pconn.socket is already talking to HOST, we needn't
973 reconnect. This happens often when both sites are virtual
974 hosts distinguished only by name and served by the same
975 network interface, and hence the same web server (possibly
976 set up by the ISP and serving many different web sites).
977 This admittedly non-standard optimization does not contradict
978 HTTP and works well with popular server software. */
982 struct address_list *al;
985 /* Don't try to talk to two different SSL sites over the same
986 secure connection! (Besides, it's not clear if name-based
987 virtual hosting is even possible with SSL.) */
990 /* If pconn.socket's peer is one of the IP addresses HOST
991 resolves to, pconn.socket is for all intents and purposes
992 already talking to HOST. */
994 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
996 /* Can't get the peer's address -- something must be very
997 wrong with the connection. */
998 invalidate_persistent ();
1001 al = lookup_host (host, 0);
1004 *host_lookup_failed = 1;
1008 found = address_list_contains (al, &ip);
1009 address_list_release (al);
1014 /* The persistent connection's peer address was found among the
1015 addresses HOST resolved to; therefore, pconn.sock is in fact
1016 already talking to HOST -- no need to reconnect. */
1019 /* Finally, check whether the connection is still open. This is
1020 important because most server implement a liberal (short) timeout
1021 on persistent connections. Wget can of course always reconnect
1022 if the connection doesn't work out, but it's nicer to know in
1023 advance. This test is a logical followup of the first test, but
1024 is "expensive" and therefore placed at the end of the list. */
1026 if (!test_socket_open (pconn.socket))
1028 /* Oops, the socket is no longer open. Now that we know that,
1029 let's invalidate the persistent connection before returning
1031 invalidate_persistent ();
1038 /* The idea behind these two CLOSE macros is to distinguish between
1039 two cases: one when the job we've been doing is finished, and we
1040 want to close the connection and leave, and two when something is
1041 seriously wrong and we're closing the connection as part of
1044 In case of keep_alive, CLOSE_FINISH should leave the connection
1045 open, while CLOSE_INVALIDATE should still close it.
1047 Note that the semantics of the flag `keep_alive' is "this
1048 connection *will* be reused (the server has promised not to close
1049 the connection once we're done)", while the semantics of
1050 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1051 active, registered connection". */
1053 #define CLOSE_FINISH(fd) do { \
1056 if (pconn_active && (fd) == pconn.socket) \
1057 invalidate_persistent (); \
1066 #define CLOSE_INVALIDATE(fd) do { \
1067 if (pconn_active && (fd) == pconn.socket) \
1068 invalidate_persistent (); \
1076 wgint len; /* received length */
1077 wgint contlen; /* expected length */
1078 wgint restval; /* the restart value */
1079 int res; /* the result of last read */
1080 char *newloc; /* new location (redirection) */
1081 char *remote_time; /* remote time-stamp string */
1082 char *error; /* textual HTTP error */
1083 int statcode; /* status code */
1084 wgint rd_size; /* amount of data read from socket */
1085 double dltime; /* time it took to download the data */
1086 const char *referer; /* value of the referer header. */
1087 char **local_file; /* local file. */
1091 free_hstat (struct http_stat *hs)
1093 xfree_null (hs->newloc);
1094 xfree_null (hs->remote_time);
1095 xfree_null (hs->error);
1097 /* Guard against being called twice. */
1099 hs->remote_time = NULL;
1103 static char *create_authorization_line PARAMS ((const char *, const char *,
1104 const char *, const char *,
1105 const char *, int *));
1106 static char *basic_authentication_encode PARAMS ((const char *, const char *));
1107 static int known_authentication_scheme_p PARAMS ((const char *, const char *));
1109 time_t http_atotm PARAMS ((const char *));
1111 #define BEGINS_WITH(line, string_constant) \
1112 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1113 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1114 || !line[sizeof (string_constant) - 1]))
1116 /* Retrieve a document through HTTP protocol. It recognizes status
1117 code, and correctly handles redirections. It closes the network
1118 socket. If it receives an error from the functions below it, it
1119 will print it if there is enough information to do so (almost
1120 always), returning the error to the caller (i.e. http_loop).
1122 Various HTTP parameters are stored to hs.
1124 If PROXY is non-NULL, the connection will be made to the proxy
1125 server, and u->url will be requested. */
1127 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1129 struct request *req;
1132 char *user, *passwd;
1136 wgint contlen, contrange;
1143 /* Set to 1 when the authorization has failed permanently and should
1144 not be tried again. */
1145 int auth_finished = 0;
1147 /* Whether NTLM authentication is used for this request. */
1150 /* Whether our connection to the remote host is through SSL. */
1154 struct response *resp;
1158 /* Whether this connection will be kept alive after the HTTP request
1162 /* Whether keep-alive should be inhibited.
1164 RFC 2068 requests that 1.0 clients not send keep-alive requests
1165 to proxies. This is because many 1.0 proxies do not interpret
1166 the Connection header and transfer it to the remote server,
1167 causing it to not close the connection and leave both the proxy
1168 and the client hanging. */
1169 int inhibit_keep_alive =
1170 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1172 /* Headers sent when using POST. */
1173 wgint post_data_size = 0;
1175 int host_lookup_failed = 0;
1178 if (u->scheme == SCHEME_HTTPS)
1180 /* Initialize the SSL context. After this has once been done,
1181 it becomes a no-op. */
1182 switch (ssl_init ())
1184 case SSLERRCTXCREATE:
1186 logprintf (LOG_NOTQUIET, _("Failed to set up an SSL context\n"));
1187 return SSLERRCTXCREATE;
1188 case SSLERRCERTFILE:
1189 /* try without certfile */
1190 logprintf (LOG_NOTQUIET,
1191 _("Failed to load certificates from %s\n"),
1193 logprintf (LOG_NOTQUIET,
1194 _("Trying without the specified certificate\n"));
1197 logprintf (LOG_NOTQUIET,
1198 _("Failed to get certificate key from %s\n"),
1200 logprintf (LOG_NOTQUIET,
1201 _("Trying without the specified certificate\n"));
1207 #endif /* HAVE_SSL */
1209 if (!(*dt & HEAD_ONLY))
1210 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
1211 know the local filename so we can save to it. */
1212 assert (*hs->local_file != NULL);
1214 /* Initialize certain elements of struct http_stat. */
1219 hs->remote_time = NULL;
1224 /* Prepare the request to send. */
1226 req = request_new ();
1228 const char *meth = "GET";
1229 if (*dt & HEAD_ONLY)
1231 else if (opt.post_file_name || opt.post_data)
1233 /* Use the full path, i.e. one that includes the leading slash and
1234 the query string. E.g. if u->path is "foo/bar" and u->query is
1235 "param=value", full_path will be "/foo/bar?param=value". */
1236 request_set_method (req, meth,
1237 proxy ? xstrdup (u->url) : url_full_path (u));
1240 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1241 if (*dt & SEND_NOCACHE)
1242 request_set_header (req, "Pragma", "no-cache", rel_none);
1244 request_set_header (req, "Range",
1245 aprintf ("bytes=%s-",
1246 number_to_static_string (hs->restval)),
1249 request_set_header (req, "User-Agent", opt.useragent, rel_none);
1251 request_set_header (req, "User-Agent",
1252 aprintf ("Wget/%s", version_string), rel_value);
1253 request_set_header (req, "Accept", "*/*", rel_none);
1255 /* Find the username and password for authentication. */
1258 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1259 user = user ? user : opt.http_user;
1260 passwd = passwd ? passwd : opt.http_passwd;
1264 /* We have the username and the password, but haven't tried
1265 any authorization yet. Let's see if the "Basic" method
1266 works. If not, we'll come back here and construct a
1267 proper authorization method with the right challenges.
1269 If we didn't employ this kind of logic, every URL that
1270 requires authorization would have to be processed twice,
1271 which is very suboptimal and generates a bunch of false
1272 "unauthorized" errors in the server log.
1274 #### But this logic also has a serious problem when used
1275 with stronger authentications: we *first* transmit the
1276 username and the password in clear text, and *then* attempt a
1277 stronger authentication scheme. That cannot be right! We
1278 are only fortunate that almost everyone still uses the
1279 `Basic' scheme anyway.
1281 There should be an option to prevent this from happening, for
1282 those who use strong authentication schemes and value their
1284 request_set_header (req, "Authorization",
1285 basic_authentication_encode (user, passwd),
1292 char *proxy_user, *proxy_passwd;
1293 /* For normal username and password, URL components override
1294 command-line/wgetrc parameters. With proxy
1295 authentication, it's the reverse, because proxy URLs are
1296 normally the "permanent" ones, so command-line args
1297 should take precedence. */
1298 if (opt.proxy_user && opt.proxy_passwd)
1300 proxy_user = opt.proxy_user;
1301 proxy_passwd = opt.proxy_passwd;
1305 proxy_user = proxy->user;
1306 proxy_passwd = proxy->passwd;
1308 /* #### This does not appear right. Can't the proxy request,
1309 say, `Digest' authentication? */
1310 if (proxy_user && proxy_passwd)
1311 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1313 /* If we're using a proxy, we will be connecting to the proxy
1317 /* Proxy authorization over SSL is handled below. */
1319 if (u->scheme != SCHEME_HTTPS)
1321 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1325 /* Whether we need to print the host header with braces around
1326 host, e.g. "Host: [3ffe:8100:200:2::2]:1234" instead of the
1327 usual "Host: symbolic-name:1234". */
1328 int squares = strchr (u->host, ':') != NULL;
1329 if (u->port == scheme_default_port (u->scheme))
1330 request_set_header (req, "Host",
1331 aprintf (squares ? "[%s]" : "%s", u->host),
1334 request_set_header (req, "Host",
1335 aprintf (squares ? "[%s]:%d" : "%s:%d",
1340 if (!inhibit_keep_alive)
1341 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1344 request_set_header (req, "Cookie",
1345 cookie_header (wget_cookie_jar,
1346 u->host, u->port, u->path,
1348 u->scheme == SCHEME_HTTPS
1355 if (opt.post_data || opt.post_file_name)
1357 request_set_header (req, "Content-Type",
1358 "application/x-www-form-urlencoded", rel_none);
1360 post_data_size = strlen (opt.post_data);
1363 post_data_size = file_size (opt.post_file_name);
1364 if (post_data_size == -1)
1366 logprintf (LOG_NOTQUIET, "POST data file missing: %s\n",
1367 opt.post_file_name);
1371 request_set_header (req, "Content-Length",
1372 xstrdup (number_to_static_string (post_data_size)),
1376 /* Add the user headers. */
1377 if (opt.user_headers)
1380 for (i = 0; opt.user_headers[i]; i++)
1381 request_set_user_header (req, opt.user_headers[i]);
1385 /* We need to come back here when the initial attempt to retrieve
1386 without authorization header fails. (Expected to happen at least
1387 for the Digest authorization scheme.) */
1391 /* Establish the connection. */
1393 if (!inhibit_keep_alive)
1395 /* Look for a persistent connection to target host, unless a
1396 proxy is used. The exception is when SSL is in use, in which
1397 case the proxy is nothing but a passthrough to the target
1398 host, registered as a connection to the latter. */
1399 struct url *relevant = conn;
1401 if (u->scheme == SCHEME_HTTPS)
1405 if (persistent_available_p (relevant->host, relevant->port,
1407 relevant->scheme == SCHEME_HTTPS,
1411 &host_lookup_failed))
1413 sock = pconn.socket;
1414 using_ssl = pconn.ssl;
1415 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1416 escnonprint (pconn.host), pconn.port);
1417 DEBUGP (("Reusing fd %d.\n", sock));
1418 if (pconn.authorized)
1419 /* If the connection is already authorized, the "Basic"
1420 authorization added by code above is unnecessary and
1422 request_remove_header (req, "Authorization");
1428 /* In its current implementation, persistent_available_p will
1429 look up conn->host in some cases. If that lookup failed, we
1430 don't need to bother with connect_to_host. */
1431 if (host_lookup_failed)
1437 sock = connect_to_host (conn->host, conn->port);
1446 return (retryable_socket_connect_error (errno)
1447 ? CONERROR : CONIMPOSSIBLE);
1451 if (proxy && u->scheme == SCHEME_HTTPS)
1453 /* When requesting SSL URLs through proxies, use the
1454 CONNECT method to request passthrough. */
1455 struct request *connreq = request_new ();
1456 request_set_method (connreq, "CONNECT",
1457 aprintf ("%s:%d", u->host, u->port));
1460 request_set_header (connreq, "Proxy-Authorization",
1461 proxyauth, rel_value);
1462 /* Now that PROXYAUTH is part of the CONNECT request,
1463 zero it out so we don't send proxy authorization with
1464 the regular request below. */
1468 write_error = request_send (connreq, sock);
1469 request_free (connreq);
1470 if (write_error < 0)
1472 logprintf (LOG_VERBOSE, _("Failed writing to proxy: %s.\n"),
1474 CLOSE_INVALIDATE (sock);
1478 head = read_http_response_head (sock);
1481 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1483 CLOSE_INVALIDATE (sock);
1492 DEBUGP (("proxy responded with: [%s]\n", head));
1494 resp = resp_new (head);
1495 statcode = resp_status (resp, &message);
1498 if (statcode != 200)
1501 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1502 message ? escnonprint (message) : "?");
1503 xfree_null (message);
1506 xfree_null (message);
1508 /* SOCK is now *really* connected to u->host, so update CONN
1509 to reflect this. That way register_persistent will
1510 register SOCK as being connected to u->host:u->port. */
1514 if (conn->scheme == SCHEME_HTTPS)
1516 if (!ssl_connect (sock))
1523 #endif /* HAVE_SSL */
1526 /* Send the request to server. */
1527 write_error = request_send (req, sock);
1529 if (write_error >= 0)
1533 DEBUGP (("[POST data: %s]\n", opt.post_data));
1534 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1536 else if (opt.post_file_name && post_data_size != 0)
1537 write_error = post_file (sock, opt.post_file_name, post_data_size);
1540 if (write_error < 0)
1542 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
1544 CLOSE_INVALIDATE (sock);
1548 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1549 proxy ? "Proxy" : "HTTP");
1554 head = read_http_response_head (sock);
1559 logputs (LOG_NOTQUIET, _("No data received.\n"));
1560 CLOSE_INVALIDATE (sock);
1566 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1568 CLOSE_INVALIDATE (sock);
1573 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1575 resp = resp_new (head);
1577 /* Check for status line. */
1579 statcode = resp_status (resp, &message);
1580 if (!opt.server_response)
1581 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1582 message ? escnonprint (message) : "");
1585 logprintf (LOG_VERBOSE, "\n");
1586 print_server_response (resp, " ");
1589 if (!opt.ignore_length
1590 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1594 parsed = str_to_wgint (hdrval, NULL, 10);
1595 if (parsed == WGINT_MAX && errno == ERANGE)
1597 #### If Content-Length is out of range, it most likely
1598 means that the file is larger than 2G and that we're
1599 compiled without LFS. In that case we should probably
1600 refuse to even attempt to download the file. */
1606 /* Check for keep-alive related responses. */
1607 if (!inhibit_keep_alive && contlen != -1)
1609 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1611 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1613 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1618 /* The server has promised that it will not close the connection
1619 when we're done. This means that we can register it. */
1620 register_persistent (conn->host, conn->port, sock, using_ssl);
1622 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1624 /* Authorization is required. */
1625 if (skip_short_body (sock, contlen))
1626 CLOSE_FINISH (sock);
1628 CLOSE_INVALIDATE (sock);
1629 pconn.authorized = 0;
1630 if (auth_finished || !(user && passwd))
1632 /* If we have tried it already, then there is not point
1634 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1638 /* IIS sometimes sends two instances of WWW-Authenticate
1639 header, one with the keyword "negotiate", and other with
1640 useful data. Loop over all occurrences of this header
1641 and use the one we recognize. */
1643 const char *wabeg, *waend;
1644 char *www_authenticate = NULL;
1646 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1647 &wabeg, &waend)) != -1;
1649 if (known_authentication_scheme_p (wabeg, waend))
1651 www_authenticate = strdupdelim (wabeg, waend);
1654 /* If the authentication header is missing or recognized, or
1655 if the authentication scheme is "Basic" (which we send by
1656 default), there's no sense in retrying. */
1657 if (!www_authenticate
1658 || BEGINS_WITH (www_authenticate, "Basic"))
1660 xfree_null (www_authenticate);
1661 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1666 pth = url_full_path (u);
1667 request_set_header (req, "Authorization",
1668 create_authorization_line (www_authenticate,
1670 request_method (req),
1674 if (BEGINS_WITH (www_authenticate, "NTLM"))
1677 xfree (www_authenticate);
1678 goto retry_with_auth;
1684 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
1686 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
1688 pconn.authorized = 1;
1692 hs->statcode = statcode;
1694 hs->error = xstrdup (_("Malformed status line"));
1696 hs->error = xstrdup (_("(no description)"));
1698 hs->error = xstrdup (message);
1701 type = resp_header_strdup (resp, "Content-Type");
1704 char *tmp = strchr (type, ';');
1707 while (tmp > type && ISSPACE (tmp[-1]))
1712 hs->newloc = resp_header_strdup (resp, "Location");
1713 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
1715 /* Handle (possibly multiple instances of) the Set-Cookie header. */
1718 const char *scbeg, *scend;
1719 /* The jar should have been created by now. */
1720 assert (wget_cookie_jar != NULL);
1722 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
1723 &scbeg, &scend)) != -1;
1726 char *set_cookie = strdupdelim (scbeg, scend);
1727 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port, u->path,
1733 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
1735 wgint first_byte_pos, last_byte_pos, entity_length;
1736 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
1738 contrange = first_byte_pos;
1743 /* 20x responses are counted among successful by default. */
1744 if (H_20X (statcode))
1747 /* Return if redirected. */
1748 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1750 /* RFC2068 says that in case of the 300 (multiple choices)
1751 response, the server can output a preferred URL through
1752 `Location' header; otherwise, the request should be treated
1753 like GET. So, if the location is set, it will be a
1754 redirection; otherwise, just proceed normally. */
1755 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1759 logprintf (LOG_VERBOSE,
1760 _("Location: %s%s\n"),
1761 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
1762 hs->newloc ? _(" [following]") : "");
1765 if (skip_short_body (sock, contlen))
1766 CLOSE_FINISH (sock);
1768 CLOSE_INVALIDATE (sock);
1775 /* If content-type is not given, assume text/html. This is because
1776 of the multitude of broken CGI's that "forget" to generate the
1779 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1780 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1785 if (opt.html_extension && (*dt & TEXTHTML))
1786 /* -E / --html-extension / html_extension = on was specified, and this is a
1787 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1788 already the file's suffix, tack on ".html". */
1790 char* last_period_in_local_filename = strrchr(*hs->local_file, '.');
1792 if (last_period_in_local_filename == NULL
1793 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1794 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1796 size_t local_filename_len = strlen(*hs->local_file);
1798 *hs->local_file = xrealloc(*hs->local_file,
1799 local_filename_len + sizeof(".html"));
1800 strcpy(*hs->local_file + local_filename_len, ".html");
1802 *dt |= ADDED_HTML_EXTENSION;
1806 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
1808 /* If `-c' is in use and the file has been fully downloaded (or
1809 the remote file has shrunk), Wget effectively requests bytes
1810 after the end of file and the server response with 416. */
1811 logputs (LOG_VERBOSE, _("\
1812 \n The file is already fully retrieved; nothing to do.\n\n"));
1813 /* In case the caller inspects. */
1816 /* Mark as successfully retrieved. */
1819 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1820 might be more bytes in the body. */
1821 return RETRUNNEEDED;
1823 if ((contrange != 0 && contrange != hs->restval)
1824 || (H_PARTIAL (statcode) && !contrange))
1826 /* The Range request was somehow misunderstood by the server.
1829 CLOSE_INVALIDATE (sock);
1832 hs->contlen = contlen + contrange;
1838 /* No need to print this output if the body won't be
1839 downloaded at all, or if the original server response is
1841 logputs (LOG_VERBOSE, _("Length: "));
1844 logputs (LOG_VERBOSE, with_thousand_seps (contlen + contrange));
1845 if (contlen + contrange >= 1024)
1846 logprintf (LOG_VERBOSE, " (%s)",
1847 human_readable (contlen + contrange));
1850 if (contlen >= 1024)
1851 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
1852 with_thousand_seps (contlen),
1853 human_readable (contlen));
1855 logprintf (LOG_VERBOSE, _(", %s remaining"),
1856 with_thousand_seps (contlen));
1860 logputs (LOG_VERBOSE,
1861 opt.ignore_length ? _("ignored") : _("unspecified"));
1863 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
1865 logputs (LOG_VERBOSE, "\n");
1869 type = NULL; /* We don't need it any more. */
1871 /* Return if we have no intention of further downloading. */
1872 if (!(*dt & RETROKF) || (*dt & HEAD_ONLY))
1874 /* In case the caller cares to look... */
1878 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
1879 servers not to send body in response to a HEAD request. If
1880 you encounter such a server (more likely a broken CGI), use
1881 `--no-http-keep-alive'. */
1882 CLOSE_FINISH (sock);
1883 return RETRFINISHED;
1886 /* Open the local file. */
1889 mkalldirs (*hs->local_file);
1891 rotate_backups (*hs->local_file);
1893 fp = fopen (*hs->local_file, "ab");
1894 else if (opt.noclobber || opt.always_rest || opt.timestamping || opt.dirstruct
1895 || opt.output_document)
1896 fp = fopen (*hs->local_file, "wb");
1899 fp = fopen_excl (*hs->local_file, 1);
1900 if (!fp && errno == EEXIST)
1902 /* We cannot just invent a new name and use it (which is
1903 what functions like unique_create typically do)
1904 because we told the user we'd use this name.
1905 Instead, return and retry the download. */
1906 logprintf (LOG_NOTQUIET,
1907 _("%s has sprung into existence.\n"),
1909 CLOSE_INVALIDATE (sock);
1910 return FOPEN_EXCL_ERR;
1915 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1916 CLOSE_INVALIDATE (sock);
1923 /* #### This confuses the timestamping code that checks for file
1924 size. Maybe we should save some additional information? */
1925 if (opt.save_headers)
1926 fwrite (head, 1, strlen (head), fp);
1928 /* Download the request body. */
1931 flags |= rb_read_exactly;
1932 if (hs->restval > 0 && contrange == 0)
1933 /* If the server ignored our range request, instruct fd_read_body
1934 to skip the first RESTVAL bytes of body. */
1935 flags |= rb_skip_startpos;
1936 hs->len = hs->restval;
1938 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
1939 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
1943 CLOSE_FINISH (sock);
1945 CLOSE_INVALIDATE (sock);
1948 /* Close or flush the file. We have to be careful to check for
1949 error here. Checking the result of fwrite() is not enough --
1950 errors could go unnoticed! */
1953 flush_res = fclose (fp);
1955 flush_res = fflush (fp);
1956 if (flush_res == EOF)
1961 return RETRFINISHED;
1964 /* The genuine HTTP loop! This is the part where the retrieval is
1965 retried, and retried, and retried, and... */
1967 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1968 int *dt, struct url *proxy)
1971 int use_ts, got_head = 0; /* time-stamping info */
1972 char *filename_plus_orig_suffix;
1973 char *local_filename = NULL;
1974 char *tms, *locf, *tmrate;
1976 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1977 wgint local_size = 0; /* the size of the local file */
1978 size_t filename_len;
1979 struct http_stat hstat; /* HTTP status */
1983 /* This used to be done in main(), but it's a better idea to do it
1984 here so that we don't go through the hoops if we're just using
1988 if (!wget_cookie_jar)
1989 wget_cookie_jar = cookie_jar_new ();
1990 if (opt.cookies_input && !cookies_loaded_p)
1992 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
1993 cookies_loaded_p = 1;
1999 /* Warn on (likely bogus) wildcard usage in HTTP. Don't use
2000 has_wildcards_p because it would also warn on `?', and we know that
2001 shows up in CGI paths a *lot*. */
2002 if (strchr (u->url, '*'))
2003 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2007 /* Determine the local filename. */
2008 if (local_file && *local_file)
2009 hstat.local_file = local_file;
2010 else if (local_file && !opt.output_document)
2012 *local_file = url_file_name (u);
2013 hstat.local_file = local_file;
2017 dummy = url_file_name (u);
2018 hstat.local_file = &dummy;
2019 /* be honest about where we will save the file */
2020 if (local_file && opt.output_document)
2021 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2024 if (!opt.output_document)
2025 locf = *hstat.local_file;
2027 locf = opt.output_document;
2029 hstat.referer = referer;
2031 filename_len = strlen (*hstat.local_file);
2032 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
2034 if (opt.noclobber && file_exists_p (*hstat.local_file))
2036 /* If opt.noclobber is turned on and file already exists, do not
2037 retrieve the file */
2038 logprintf (LOG_VERBOSE, _("\
2039 File `%s' already there, will not retrieve.\n"), *hstat.local_file);
2040 /* If the file is there, we suppose it's retrieved OK. */
2043 /* #### Bogusness alert. */
2044 /* If its suffix is "html" or "htm" or similar, assume text/html. */
2045 if (has_html_suffix_p (*hstat.local_file))
2053 if (opt.timestamping)
2055 int local_dot_orig_file_exists = 0;
2057 if (opt.backup_converted)
2058 /* If -K is specified, we'll act on the assumption that it was specified
2059 last time these files were downloaded as well, and instead of just
2060 comparing local file X against server file X, we'll compare local
2061 file X.orig (if extant, else X) against server file X. If -K
2062 _wasn't_ specified last time, or the server contains files called
2063 *.orig, -N will be back to not operating correctly with -k. */
2065 /* Would a single s[n]printf() call be faster? --dan
2067 Definitely not. sprintf() is horribly slow. It's a
2068 different question whether the difference between the two
2069 affects a program. Usually I'd say "no", but at one
2070 point I profiled Wget, and found that a measurable and
2071 non-negligible amount of time was lost calling sprintf()
2072 in url.c. Replacing sprintf with inline calls to
2073 strcpy() and number_to_string() made a difference.
2075 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
2076 memcpy (filename_plus_orig_suffix + filename_len,
2077 ".orig", sizeof (".orig"));
2079 /* Try to stat() the .orig file. */
2080 if (stat (filename_plus_orig_suffix, &st) == 0)
2082 local_dot_orig_file_exists = 1;
2083 local_filename = filename_plus_orig_suffix;
2087 if (!local_dot_orig_file_exists)
2088 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2089 if (stat (*hstat.local_file, &st) == 0)
2090 local_filename = *hstat.local_file;
2092 if (local_filename != NULL)
2093 /* There was a local file, so we'll check later to see if the version
2094 the server has is the same version we already have, allowing us to
2100 /* Modification time granularity is 2 seconds for Windows, so
2101 increase local time by 1 second for later comparison. */
2104 local_size = st.st_size;
2108 /* Reset the counter. */
2114 /* Increment the pass counter. */
2116 sleep_between_retrievals (count);
2117 /* Get the current time string. */
2118 tms = time_str (NULL);
2119 /* Print fetch message, if opt.verbose. */
2122 char *hurl = url_string (u, 1);
2126 sprintf (tmp, _("(try:%2d)"), count);
2127 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
2128 tms, hurl, tmp, locf);
2130 ws_changetitle (hurl);
2135 /* Default document type is empty. However, if spider mode is
2136 on or time-stamping is employed, HEAD_ONLY commands is
2137 encoded within *dt. */
2138 if (opt.spider || (use_ts && !got_head))
2143 /* Decide whether or not to restart. */
2146 hstat.restval = hstat.len; /* continue where we left off */
2147 else if (opt.always_rest
2148 && stat (locf, &st) == 0
2149 && S_ISREG (st.st_mode))
2150 hstat.restval = st.st_size;
2152 /* Decide whether to send the no-cache directive. We send it in
2154 a) we're using a proxy, and we're past our first retrieval.
2155 Some proxies are notorious for caching incomplete data, so
2156 we require a fresh get.
2157 b) caching is explicitly inhibited. */
2158 if ((proxy && count > 1) /* a */
2159 || !opt.allow_cache /* b */
2161 *dt |= SEND_NOCACHE;
2163 *dt &= ~SEND_NOCACHE;
2165 /* Try fetching the document, or at least its head. */
2166 err = gethttp (u, &hstat, dt, proxy);
2168 /* It's unfortunate that wget determines the local filename before finding
2169 out the Content-Type of the file. Barring a major restructuring of the
2170 code, we need to re-set locf here, since gethttp() may have xrealloc()d
2171 *hstat.local_file to tack on ".html". */
2172 if (!opt.output_document)
2173 locf = *hstat.local_file;
2176 tms = time_str (NULL);
2177 /* Get the new location (with or without the redirection). */
2179 *newloc = xstrdup (hstat.newloc);
2182 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2183 case CONERROR: case READERR: case WRITEFAILED:
2184 case RANGEERR: case FOPEN_EXCL_ERR:
2185 /* Non-fatal errors continue executing the loop, which will
2186 bring them to "while" statement at the end, to judge
2187 whether the number of tries was exceeded. */
2188 free_hstat (&hstat);
2189 printwhat (count, opt.ntry);
2190 if (err == FOPEN_EXCL_ERR)
2192 /* Re-determine the file name. */
2193 if (local_file && *local_file)
2195 xfree (*local_file);
2196 *local_file = url_file_name (u);
2197 hstat.local_file = local_file;
2202 dummy = url_file_name (u);
2203 hstat.local_file = &dummy;
2205 /* be honest about where we will save the file */
2206 if (local_file && opt.output_document)
2207 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2208 if (!opt.output_document)
2209 locf = *hstat.local_file;
2211 locf = opt.output_document;
2215 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2216 case SSLERRCTXCREATE: case CONTNOTSUPPORTED:
2217 /* Fatal errors just return from the function. */
2218 free_hstat (&hstat);
2222 case FWRITEERR: case FOPENERR:
2223 /* Another fatal error. */
2224 logputs (LOG_VERBOSE, "\n");
2225 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2226 *hstat.local_file, strerror (errno));
2227 free_hstat (&hstat);
2232 /* Another fatal error. */
2233 logputs (LOG_VERBOSE, "\n");
2234 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2235 free_hstat (&hstat);
2240 /* Return the new location to the caller. */
2243 logprintf (LOG_NOTQUIET,
2244 _("ERROR: Redirection (%d) without location.\n"),
2246 free_hstat (&hstat);
2250 free_hstat (&hstat);
2255 /* The file was already fully retrieved. */
2256 free_hstat (&hstat);
2261 /* Deal with you later. */
2264 /* All possibilities should have been exhausted. */
2267 if (!(*dt & RETROKF))
2271 /* #### Ugly ugly ugly! */
2272 char *hurl = url_string (u, 1);
2273 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2276 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2277 tms, hstat.statcode, escnonprint (hstat.error));
2278 logputs (LOG_VERBOSE, "\n");
2279 free_hstat (&hstat);
2284 /* Did we get the time-stamp? */
2287 if (opt.timestamping && !hstat.remote_time)
2289 logputs (LOG_NOTQUIET, _("\
2290 Last-modified header missing -- time-stamps turned off.\n"));
2292 else if (hstat.remote_time)
2294 /* Convert the date-string into struct tm. */
2295 tmr = http_atotm (hstat.remote_time);
2296 if (tmr == (time_t) (-1))
2297 logputs (LOG_VERBOSE, _("\
2298 Last-modified header invalid -- time-stamp ignored.\n"));
2302 /* The time-stamping section. */
2307 use_ts = 0; /* no more time-stamping */
2308 count = 0; /* the retrieve count for HEAD is
2310 if (hstat.remote_time && tmr != (time_t) (-1))
2312 /* Now time-stamping can be used validly. Time-stamping
2313 means that if the sizes of the local and remote file
2314 match, and local file is newer than the remote file,
2315 it will not be retrieved. Otherwise, the normal
2316 download procedure is resumed. */
2318 (hstat.contlen == -1 || local_size == hstat.contlen))
2320 logprintf (LOG_VERBOSE, _("\
2321 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2323 free_hstat (&hstat);
2327 else if (tml >= tmr)
2328 logprintf (LOG_VERBOSE, _("\
2329 The sizes do not match (local %s) -- retrieving.\n"),
2330 number_to_static_string (local_size));
2332 logputs (LOG_VERBOSE,
2333 _("Remote file is newer, retrieving.\n"));
2335 free_hstat (&hstat);
2338 if ((tmr != (time_t) (-1))
2340 && ((hstat.len == hstat.contlen) ||
2341 ((hstat.res == 0) &&
2342 ((hstat.contlen == -1) ||
2343 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
2345 /* #### This code repeats in http.c and ftp.c. Move it to a
2347 const char *fl = NULL;
2348 if (opt.output_document)
2350 if (output_stream_regular)
2351 fl = opt.output_document;
2354 fl = *hstat.local_file;
2358 /* End of time-stamping section. */
2362 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode,
2363 escnonprint (hstat.error));
2368 tmrate = retr_rate (hstat.rd_size, hstat.dltime, 0);
2370 if (hstat.len == hstat.contlen)
2374 logprintf (LOG_VERBOSE,
2375 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2377 number_to_static_string (hstat.len),
2378 number_to_static_string (hstat.contlen));
2379 logprintf (LOG_NONVERBOSE,
2380 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2382 number_to_static_string (hstat.len),
2383 number_to_static_string (hstat.contlen),
2387 total_downloaded_bytes += hstat.len;
2389 /* Remember that we downloaded the file for later ".orig" code. */
2390 if (*dt & ADDED_HTML_EXTENSION)
2391 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2393 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2395 free_hstat (&hstat);
2399 else if (hstat.res == 0) /* No read error */
2401 if (hstat.contlen == -1) /* We don't know how much we were supposed
2402 to get, so assume we succeeded. */
2406 logprintf (LOG_VERBOSE,
2407 _("%s (%s) - `%s' saved [%s]\n\n"),
2409 number_to_static_string (hstat.len));
2410 logprintf (LOG_NONVERBOSE,
2411 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2412 tms, u->url, number_to_static_string (hstat.len),
2416 total_downloaded_bytes += hstat.len;
2418 /* Remember that we downloaded the file for later ".orig" code. */
2419 if (*dt & ADDED_HTML_EXTENSION)
2420 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2422 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2424 free_hstat (&hstat);
2428 else if (hstat.len < hstat.contlen) /* meaning we lost the
2429 connection too soon */
2431 logprintf (LOG_VERBOSE,
2432 _("%s (%s) - Connection closed at byte %s. "),
2433 tms, tmrate, number_to_static_string (hstat.len));
2434 printwhat (count, opt.ntry);
2435 free_hstat (&hstat);
2438 else if (!opt.kill_longer) /* meaning we got more than expected */
2440 logprintf (LOG_VERBOSE,
2441 _("%s (%s) - `%s' saved [%s/%s])\n\n"),
2443 number_to_static_string (hstat.len),
2444 number_to_static_string (hstat.contlen));
2445 logprintf (LOG_NONVERBOSE,
2446 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2448 number_to_static_string (hstat.len),
2449 number_to_static_string (hstat.contlen),
2452 total_downloaded_bytes += hstat.len;
2454 /* Remember that we downloaded the file for later ".orig" code. */
2455 if (*dt & ADDED_HTML_EXTENSION)
2456 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2458 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2460 free_hstat (&hstat);
2464 else /* the same, but not accepted */
2466 logprintf (LOG_VERBOSE,
2467 _("%s (%s) - Connection closed at byte %s/%s. "),
2469 number_to_static_string (hstat.len),
2470 number_to_static_string (hstat.contlen));
2471 printwhat (count, opt.ntry);
2472 free_hstat (&hstat);
2476 else /* now hstat.res can only be -1 */
2478 if (hstat.contlen == -1)
2480 logprintf (LOG_VERBOSE,
2481 _("%s (%s) - Read error at byte %s (%s)."),
2482 tms, tmrate, number_to_static_string (hstat.len),
2484 printwhat (count, opt.ntry);
2485 free_hstat (&hstat);
2488 else /* hstat.res == -1 and contlen is given */
2490 logprintf (LOG_VERBOSE,
2491 _("%s (%s) - Read error at byte %s/%s (%s). "),
2493 number_to_static_string (hstat.len),
2494 number_to_static_string (hstat.contlen),
2496 printwhat (count, opt.ntry);
2497 free_hstat (&hstat);
2504 while (!opt.ntry || (count < opt.ntry));
2508 /* Converts struct tm to time_t, assuming the data in tm is UTC rather
2509 than local timezone.
2511 mktime is similar but assumes struct tm, also known as the
2512 "broken-down" form of time, is in local time zone. mktime_from_utc
2513 uses mktime to make the conversion understanding that an offset
2514 will be introduced by the local time assumption.
2516 mktime_from_utc then measures the introduced offset by applying
2517 gmtime to the initial result and applying mktime to the resulting
2518 "broken-down" form. The difference between the two mktime results
2519 is the measured offset which is then subtracted from the initial
2520 mktime result to yield a calendar time which is the value returned.
2522 tm_isdst in struct tm is set to 0 to force mktime to introduce a
2523 consistent offset (the non DST offset) since tm and tm+o might be
2524 on opposite sides of a DST change.
2526 Some implementations of mktime return -1 for the nonexistent
2527 localtime hour at the beginning of DST. In this event, use
2528 mktime(tm - 1hr) + 3600.
2532 gmtime(t+o) --> tm+o
2533 mktime(tm+o) --> t+2o
2534 t+o - (t+2o - t+o) = t
2536 Note that glibc contains a function of the same purpose named
2537 `timegm' (reverse of gmtime). But obviously, it is not universally
2538 available, and unfortunately it is not straightforwardly
2539 extractable for use here. Perhaps configure should detect timegm
2540 and use it where available.
2542 Contributed by Roger Beeman <beeman@cisco.com>, with the help of
2543 Mark Baushke <mdb@cisco.com> and the rest of the Gurus at CISCO.
2544 Further improved by Roger with assistance from Edward J. Sabol
2545 based on input by Jamie Zawinski. */
2548 mktime_from_utc (struct tm *t)
2559 return -1; /* can't deal with output from strptime */
2570 return -1; /* can't deal with output from gmtime */
2573 return (tl - (tb - tl));
2576 /* Check whether the result of strptime() indicates success.
2577 strptime() returns the pointer to how far it got to in the string.
2578 The processing has been successful if the string is at `GMT' or
2579 `+X', or at the end of the string.
2581 In extended regexp parlance, the function returns 1 if P matches
2582 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2583 can return) is considered a failure and 0 is returned. */
2585 check_end (const char *p)
2589 while (ISSPACE (*p))
2592 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2593 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2599 /* Convert the textual specification of time in TIME_STRING to the
2600 number of seconds since the Epoch.
2602 TIME_STRING can be in any of the three formats RFC2068 allows the
2603 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date.
2604 Timezones are ignored, and should be GMT.
2606 Return the computed time_t representation, or -1 if the conversion
2609 This function uses strptime with various string formats for parsing
2610 TIME_STRING. This results in a parser that is not as lenient in
2611 interpreting TIME_STRING as I would like it to be. Being based on
2612 strptime, it always allows shortened months, one-digit days, etc.,
2613 but due to the multitude of formats in which time can be
2614 represented, an ideal HTTP time parser would be even more
2615 forgiving. It should completely ignore things like week days and
2616 concentrate only on the various forms of representing years,
2617 months, days, hours, minutes, and seconds. For example, it would
2618 be nice if it accepted ISO 8601 out of the box.
2620 I've investigated free and PD code for this purpose, but none was
2621 usable. getdate was big and unwieldy, and had potential copyright
2622 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2623 distributed with phttpd, is excellent, but we cannot use it because
2624 it is not assigned to the FSF. So I stuck it with strptime. */
2627 http_atotm (const char *time_string)
2629 /* NOTE: Solaris strptime man page claims that %n and %t match white
2630 space, but that's not universally available. Instead, we simply
2631 use ` ' to mean "skip all WS", which works under all strptime
2632 implementations I've tested. */
2634 static const char *time_formats[] = {
2635 "%a, %d %b %Y %T", /* RFC1123: Thu, 29 Jan 1998 22:12:57 */
2636 "%A, %d-%b-%y %T", /* RFC850: Thursday, 29-Jan-98 22:12:57 */
2637 "%a, %d-%b-%Y %T", /* pseudo-RFC850: Thu, 29-Jan-1998 22:12:57
2638 (google.com uses this for their cookies.) */
2639 "%a %b %d %T %Y" /* asctime: Thu Jan 29 22:12:57 1998 */
2645 /* According to Roger Beeman, we need to initialize tm_isdst, since
2646 strptime won't do it. */
2649 /* Note that under foreign locales Solaris strptime() fails to
2650 recognize English dates, which renders this function useless. We
2651 solve this by being careful not to affect LC_TIME when
2652 initializing locale.
2654 Another solution would be to temporarily set locale to C, invoke
2655 strptime(), and restore it back. This is slow and dirty,
2656 however, and locale support other than LC_MESSAGES can mess other
2657 things, so I rather chose to stick with just setting LC_MESSAGES.
2659 GNU strptime does not have this problem because it recognizes
2660 both international and local dates. */
2662 for (i = 0; i < countof (time_formats); i++)
2663 if (check_end (strptime (time_string, time_formats[i], &t)))
2664 return mktime_from_utc (&t);
2666 /* All formats have failed. */
2670 /* Authorization support: We support three authorization schemes:
2672 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2674 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2675 consisting of answering to the server's challenge with the proper
2678 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2679 Stenberg for libcurl. Like digest, NTLM is based on a
2680 challenge-response mechanism, but unlike digest, it is non-standard
2681 (authenticates TCP connections rather than requests), undocumented
2682 and Microsoft-specific. */
2684 /* Create the authentication header contents for the `Basic' scheme.
2685 This is done by encoding the string `USER:PASS' in base64 and
2686 prepending `HEADER: Basic ' to it. */
2689 basic_authentication_encode (const char *user, const char *passwd)
2692 int len1 = strlen (user) + 1 + strlen (passwd);
2694 t1 = (char *)alloca (len1 + 1);
2695 sprintf (t1, "%s:%s", user, passwd);
2697 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
2698 base64_encode (t1, len1, t2);
2700 return concat_strings ("Basic ", t2, (char *) 0);
2703 #define SKIP_WS(x) do { \
2704 while (ISSPACE (*(x))) \
2708 #ifdef ENABLE_DIGEST
2709 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2710 of a field in such a header. If the field is the one specified by
2711 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2712 digest authorization code), extract its value in the (char*)
2713 variable pointed by RET. Returns negative on a malformed header,
2714 or number of bytes that have been parsed by this call. */
2716 extract_header_attr (const char *au, const char *attr_name, char **ret)
2719 const char *cp = au;
2721 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2723 cp += strlen (attr_name);
2736 for (ep = cp; *ep && *ep != '\"'; ep++)
2741 *ret = strdupdelim (cp, ep);
2748 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2749 an array of 16 bytes containing the hash keys, and BUF should be a
2750 buffer of 33 writable characters (32 for hex digits plus one for
2751 zero termination). */
2753 dump_hash (unsigned char *buf, const unsigned char *hash)
2757 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2759 *buf++ = XNUM_TO_digit (*hash >> 4);
2760 *buf++ = XNUM_TO_digit (*hash & 0xf);
2765 /* Take the line apart to find the challenge, and compose a digest
2766 authorization header. See RFC2069 section 2.1.2. */
2768 digest_authentication_encode (const char *au, const char *user,
2769 const char *passwd, const char *method,
2772 static char *realm, *opaque, *nonce;
2777 { "realm", &realm },
2778 { "opaque", &opaque },
2783 realm = opaque = nonce = NULL;
2785 au += 6; /* skip over `Digest' */
2791 for (i = 0; i < countof (options); i++)
2793 int skip = extract_header_attr (au, options[i].name,
2794 options[i].variable);
2798 xfree_null (opaque);
2808 if (i == countof (options))
2810 while (*au && *au != '=')
2818 while (*au && *au != '\"')
2825 while (*au && *au != ',')
2830 if (!realm || !nonce || !user || !passwd || !path || !method)
2833 xfree_null (opaque);
2838 /* Calculate the digest value. */
2840 ALLOCA_MD5_CONTEXT (ctx);
2841 unsigned char hash[MD5_HASHLEN];
2842 unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2843 unsigned char response_digest[MD5_HASHLEN * 2 + 1];
2845 /* A1BUF = H(user ":" realm ":" password) */
2847 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2848 gen_md5_update ((unsigned char *)":", 1, ctx);
2849 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2850 gen_md5_update ((unsigned char *)":", 1, ctx);
2851 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2852 gen_md5_finish (ctx, hash);
2853 dump_hash (a1buf, hash);
2855 /* A2BUF = H(method ":" path) */
2857 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2858 gen_md5_update ((unsigned char *)":", 1, ctx);
2859 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2860 gen_md5_finish (ctx, hash);
2861 dump_hash (a2buf, hash);
2863 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2865 gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
2866 gen_md5_update ((unsigned char *)":", 1, ctx);
2867 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2868 gen_md5_update ((unsigned char *)":", 1, ctx);
2869 gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
2870 gen_md5_finish (ctx, hash);
2871 dump_hash (response_digest, hash);
2873 res = (char*) xmalloc (strlen (user)
2878 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2879 + (opaque ? strlen (opaque) : 0)
2881 sprintf (res, "Digest \
2882 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2883 user, realm, nonce, path, response_digest);
2886 char *p = res + strlen (res);
2887 strcat (p, ", opaque=\"");
2894 #endif /* ENABLE_DIGEST */
2896 /* Computing the size of a string literal must take into account that
2897 value returned by sizeof includes the terminating \0. */
2898 #define STRSIZE(literal) (sizeof (literal) - 1)
2900 /* Whether chars in [b, e) begin with the literal string provided as
2901 first argument and are followed by whitespace or terminating \0.
2902 The comparison is case-insensitive. */
2903 #define STARTS(literal, b, e) \
2904 ((e) - (b) >= STRSIZE (literal) \
2905 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
2906 && ((e) - (b) == STRSIZE (literal) \
2907 || ISSPACE (b[STRSIZE (literal)])))
2910 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
2912 return STARTS ("Basic", hdrbeg, hdrend)
2913 #ifdef ENABLE_DIGEST
2914 || STARTS ("Digest", hdrbeg, hdrend)
2917 || STARTS ("NTLM", hdrbeg, hdrend)
2924 /* Create the HTTP authorization request header. When the
2925 `WWW-Authenticate' response header is seen, according to the
2926 authorization scheme specified in that header (`Basic' and `Digest'
2927 are supported by the current implementation), produce an
2928 appropriate HTTP authorization request header. */
2930 create_authorization_line (const char *au, const char *user,
2931 const char *passwd, const char *method,
2932 const char *path, int *finished)
2934 /* We are called only with known schemes, so we can dispatch on the
2936 switch (TOUPPER (*au))
2938 case 'B': /* Basic */
2940 return basic_authentication_encode (user, passwd);
2941 #ifdef ENABLE_DIGEST
2942 case 'D': /* Digest */
2944 return digest_authentication_encode (au, user, passwd, method, path);
2947 case 'N': /* NTLM */
2948 if (!ntlm_input (&pconn.ntlm, au))
2953 return ntlm_output (&pconn.ntlm, user, passwd, finished);
2956 /* We shouldn't get here -- this function should be only called
2957 with values approved by known_authentication_scheme_p. */
2965 if (wget_cookie_jar)
2966 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
2972 xfree_null (pconn.host);
2973 if (wget_cookie_jar)
2974 cookie_jar_delete (wget_cookie_jar);