2 Copyright (C) 1996-2005 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 Foundation, Inc.,
18 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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. */
55 # include "http-ntlm.h"
63 extern char *version_string;
66 # define MIN(x, y) ((x) > (y) ? (y) : (x))
70 static bool cookies_loaded_p;
71 static struct cookie_jar *wget_cookie_jar;
73 #define TEXTHTML_S "text/html"
74 #define TEXTXHTML_S "application/xhtml+xml"
76 /* Some status code validation macros: */
77 #define H_20X(x) (((x) >= 200) && ((x) < 300))
78 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
79 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
80 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
81 || (x) == HTTP_STATUS_SEE_OTHER \
82 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
84 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
86 #define HTTP_STATUS_OK 200
87 #define HTTP_STATUS_CREATED 201
88 #define HTTP_STATUS_ACCEPTED 202
89 #define HTTP_STATUS_NO_CONTENT 204
90 #define HTTP_STATUS_PARTIAL_CONTENTS 206
92 /* Redirection 3xx. */
93 #define HTTP_STATUS_MULTIPLE_CHOICES 300
94 #define HTTP_STATUS_MOVED_PERMANENTLY 301
95 #define HTTP_STATUS_MOVED_TEMPORARILY 302
96 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
97 #define HTTP_STATUS_NOT_MODIFIED 304
98 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
100 /* Client error 4xx. */
101 #define HTTP_STATUS_BAD_REQUEST 400
102 #define HTTP_STATUS_UNAUTHORIZED 401
103 #define HTTP_STATUS_FORBIDDEN 403
104 #define HTTP_STATUS_NOT_FOUND 404
105 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
107 /* Server errors 5xx. */
108 #define HTTP_STATUS_INTERNAL 500
109 #define HTTP_STATUS_NOT_IMPLEMENTED 501
110 #define HTTP_STATUS_BAD_GATEWAY 502
111 #define HTTP_STATUS_UNAVAILABLE 503
114 rel_none, rel_name, rel_value, rel_both
121 struct request_header {
123 enum rp release_policy;
125 int hcount, hcapacity;
128 /* Create a new, empty request. At least request_set_method must be
129 called before the request can be used. */
131 static struct request *
134 struct request *req = xnew0 (struct request);
136 req->headers = xnew_array (struct request_header, req->hcapacity);
140 /* Set the request's method and its arguments. METH should be a
141 literal string (or it should outlive the request) because it will
142 not be freed. ARG will be freed by request_free. */
145 request_set_method (struct request *req, const char *meth, char *arg)
151 /* Return the method string passed with the last call to
152 request_set_method. */
155 request_method (const struct request *req)
160 /* Free one header according to the release policy specified with
161 request_set_header. */
164 release_header (struct request_header *hdr)
166 switch (hdr->release_policy)
183 /* Set the request named NAME to VALUE. Specifically, this means that
184 a "NAME: VALUE\r\n" header line will be used in the request. If a
185 header with the same name previously existed in the request, its
186 value will be replaced by this one. A NULL value means do nothing.
188 RELEASE_POLICY determines whether NAME and VALUE should be released
189 (freed) with request_free. Allowed values are:
191 - rel_none - don't free NAME or VALUE
192 - rel_name - free NAME when done
193 - rel_value - free VALUE when done
194 - rel_both - free both NAME and VALUE when done
196 Setting release policy is useful when arguments come from different
197 sources. For example:
199 // Don't free literal strings!
200 request_set_header (req, "Pragma", "no-cache", rel_none);
202 // Don't free a global variable, we'll need it later.
203 request_set_header (req, "Referer", opt.referer, rel_none);
205 // Value freshly allocated, free it when done.
206 request_set_header (req, "Range",
207 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
212 request_set_header (struct request *req, char *name, char *value,
213 enum rp release_policy)
215 struct request_header *hdr;
220 /* A NULL value is a no-op; if freeing the name is requested,
221 free it now to avoid leaks. */
222 if (release_policy == rel_name || release_policy == rel_both)
227 for (i = 0; i < req->hcount; i++)
229 hdr = &req->headers[i];
230 if (0 == strcasecmp (name, hdr->name))
232 /* Replace existing header. */
233 release_header (hdr);
236 hdr->release_policy = release_policy;
241 /* Install new header. */
243 if (req->hcount >= req->hcapacity)
245 req->hcapacity <<= 1;
246 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
248 hdr = &req->headers[req->hcount++];
251 hdr->release_policy = release_policy;
254 /* Like request_set_header, but sets the whole header line, as
255 provided by the user using the `--header' option. For example,
256 request_set_user_header (req, "Foo: bar") works just like
257 request_set_header (req, "Foo", "bar"). */
260 request_set_user_header (struct request *req, const char *header)
263 const char *p = strchr (header, ':');
266 BOUNDED_TO_ALLOCA (header, p, name);
270 request_set_header (req, xstrdup (name), (char *) p, rel_name);
273 /* Remove the header with specified name from REQ. Returns true if
274 the header was actually removed, false otherwise. */
277 request_remove_header (struct request *req, char *name)
280 for (i = 0; i < req->hcount; i++)
282 struct request_header *hdr = &req->headers[i];
283 if (0 == strcasecmp (name, hdr->name))
285 release_header (hdr);
286 /* Move the remaining headers by one. */
287 if (i < req->hcount - 1)
288 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
296 #define APPEND(p, str) do { \
297 int A_len = strlen (str); \
298 memcpy (p, str, A_len); \
302 /* Construct the request and write it to FD using fd_write. */
305 request_send (const struct request *req, int fd)
307 char *request_string, *p;
308 int i, size, write_error;
310 /* Count the request size. */
313 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
314 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
316 for (i = 0; i < req->hcount; i++)
318 struct request_header *hdr = &req->headers[i];
319 /* NAME ": " VALUE "\r\n" */
320 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
326 p = request_string = alloca_array (char, size);
328 /* Generate the request. */
330 APPEND (p, req->method); *p++ = ' ';
331 APPEND (p, req->arg); *p++ = ' ';
332 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
334 for (i = 0; i < req->hcount; i++)
336 struct request_header *hdr = &req->headers[i];
337 APPEND (p, hdr->name);
338 *p++ = ':', *p++ = ' ';
339 APPEND (p, hdr->value);
340 *p++ = '\r', *p++ = '\n';
343 *p++ = '\r', *p++ = '\n', *p++ = '\0';
344 assert (p - request_string == size);
348 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
350 /* Send the request to the server. */
352 write_error = fd_write (fd, request_string, size - 1, -1);
354 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
359 /* Release the resources used by REQ. */
362 request_free (struct request *req)
365 xfree_null (req->arg);
366 for (i = 0; i < req->hcount; i++)
367 release_header (&req->headers[i]);
368 xfree_null (req->headers);
372 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
373 PROMISED_SIZE bytes are sent over the wire -- if the file is
374 longer, read only that much; if the file is shorter, report an error. */
377 post_file (int sock, const char *file_name, wgint promised_size)
379 static char chunk[8192];
384 DEBUGP (("[writing POST file %s ... ", file_name));
386 fp = fopen (file_name, "rb");
389 while (!feof (fp) && written < promised_size)
392 int length = fread (chunk, 1, sizeof (chunk), fp);
395 towrite = MIN (promised_size - written, length);
396 write_error = fd_write (sock, chunk, towrite, -1);
406 /* If we've written less than was promised, report a (probably
407 nonsensical) error rather than break the promise. */
408 if (written < promised_size)
414 assert (written == promised_size);
415 DEBUGP (("done]\n"));
419 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
420 If so, return the pointer to the position after the line, otherwise
421 return NULL. This is used as callback to fd_read_hunk. The data
422 between START and PEEKED has been read and cannot be "unread"; the
423 data after PEEKED has only been peeked. */
426 response_head_terminator (const char *start, const char *peeked, int peeklen)
430 /* If at first peek, verify whether HUNK starts with "HTTP". If
431 not, this is a HTTP/0.9 request and we must bail out without
433 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
436 /* Look for "\n[\r]\n", and return the following position if found.
437 Start two chars before the current to cover the possibility that
438 part of the terminator (e.g. "\n\r") arrived in the previous
440 p = peeked - start < 2 ? start : peeked - 2;
441 end = peeked + peeklen;
443 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
444 for (; p < end - 2; p++)
447 if (p[1] == '\r' && p[2] == '\n')
449 else if (p[1] == '\n')
452 /* p==end-2: check for \n\n directly preceding END. */
453 if (p[0] == '\n' && p[1] == '\n')
459 /* The maximum size of a single HTTP response we care to read. Rather
460 than being a limit of the reader implementation, this limit
461 prevents Wget from slurping all available memory upon encountering
462 malicious or buggy server output, thus protecting the user. Define
463 it to 0 to remove the limit. */
465 #define HTTP_RESPONSE_MAX_SIZE 65536
467 /* Read the HTTP request head from FD and return it. The error
468 conditions are the same as with fd_read_hunk.
470 To support HTTP/0.9 responses, this function tries to make sure
471 that the data begins with "HTTP". If this is not the case, no data
472 is read and an empty request is returned, so that the remaining
473 data can be treated as body. */
476 read_http_response_head (int fd)
478 return fd_read_hunk (fd, response_head_terminator, 512,
479 HTTP_RESPONSE_MAX_SIZE);
483 /* The response data. */
486 /* The array of pointers that indicate where each header starts.
487 For example, given this HTTP response:
494 The headers are located like this:
496 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
498 headers[0] headers[1] headers[2] headers[3]
500 I.e. headers[0] points to the beginning of the request,
501 headers[1] points to the end of the first header and the
502 beginning of the second one, etc. */
504 const char **headers;
507 /* Create a new response object from the text of the HTTP response,
508 available in HEAD. That text is automatically split into
509 constituent header lines for fast retrieval using
512 static struct response *
513 resp_new (const char *head)
518 struct response *resp = xnew0 (struct response);
523 /* Empty head means that we're dealing with a headerless
524 (HTTP/0.9) response. In that case, don't set HEADERS at
529 /* Split HEAD into header lines, so that resp_header_* functions
530 don't need to do this over and over again. */
536 DO_REALLOC (resp->headers, size, count + 1, const char *);
537 resp->headers[count++] = hdr;
539 /* Break upon encountering an empty line. */
540 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
543 /* Find the end of HDR, including continuations. */
546 const char *end = strchr (hdr, '\n');
552 while (*hdr == ' ' || *hdr == '\t');
554 DO_REALLOC (resp->headers, size, count + 1, const char *);
555 resp->headers[count] = NULL;
560 /* Locate the header named NAME in the request data, starting with
561 position START. This allows the code to loop through the request
562 data, filtering for all requests of a given name. Returns the
563 found position, or -1 for failure. The code that uses this
564 function typically looks like this:
566 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
567 ... do something with header ...
569 If you only care about one header, use resp_header_get instead of
573 resp_header_locate (const struct response *resp, const char *name, int start,
574 const char **begptr, const char **endptr)
577 const char **headers = resp->headers;
580 if (!headers || !headers[1])
583 name_len = strlen (name);
589 for (; headers[i + 1]; i++)
591 const char *b = headers[i];
592 const char *e = headers[i + 1];
594 && b[name_len] == ':'
595 && 0 == strncasecmp (b, name, name_len))
598 while (b < e && ISSPACE (*b))
600 while (b < e && ISSPACE (e[-1]))
610 /* Find and retrieve the header named NAME in the request data. If
611 found, set *BEGPTR to its starting, and *ENDPTR to its ending
612 position, and return true. Otherwise return false.
614 This function is used as a building block for resp_header_copy
615 and resp_header_strdup. */
618 resp_header_get (const struct response *resp, const char *name,
619 const char **begptr, const char **endptr)
621 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
625 /* Copy the response header named NAME to buffer BUF, no longer than
626 BUFSIZE (BUFSIZE includes the terminating 0). If the header
627 exists, true is returned, false otherwise. If there should be no
628 limit on the size of the header, use resp_header_strdup instead.
630 If BUFSIZE is 0, no data is copied, but the boolean indication of
631 whether the header is present is still returned. */
634 resp_header_copy (const struct response *resp, const char *name,
635 char *buf, int bufsize)
638 if (!resp_header_get (resp, name, &b, &e))
642 int len = MIN (e - b, bufsize - 1);
643 memcpy (buf, b, len);
649 /* Return the value of header named NAME in RESP, allocated with
650 malloc. If such a header does not exist in RESP, return NULL. */
653 resp_header_strdup (const struct response *resp, const char *name)
656 if (!resp_header_get (resp, name, &b, &e))
658 return strdupdelim (b, e);
661 /* Parse the HTTP status line, which is of format:
663 HTTP-Version SP Status-Code SP Reason-Phrase
665 The function returns the status-code, or -1 if the status line
666 appears malformed. The pointer to "reason-phrase" message is
667 returned in *MESSAGE. */
670 resp_status (const struct response *resp, char **message)
677 /* For a HTTP/0.9 response, assume status 200. */
679 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
683 p = resp->headers[0];
684 end = resp->headers[1];
690 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
694 /* Match the HTTP version. This is optional because Gnutella
695 servers have been reported to not specify HTTP version. */
696 if (p < end && *p == '/')
699 while (p < end && ISDIGIT (*p))
701 if (p < end && *p == '.')
703 while (p < end && ISDIGIT (*p))
707 while (p < end && ISSPACE (*p))
709 if (end - p < 3 || !ISDIGIT (p[0]) || !ISDIGIT (p[1]) || !ISDIGIT (p[2]))
712 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
717 while (p < end && ISSPACE (*p))
719 while (p < end && ISSPACE (end[-1]))
721 *message = strdupdelim (p, end);
727 /* Release the resources used by RESP. */
730 resp_free (struct response *resp)
732 xfree_null (resp->headers);
736 /* Print the server response, line by line, omitting the trailing CRLF
737 from individual header lines, and prefixed with PREFIX. */
740 print_server_response (const struct response *resp, const char *prefix)
745 for (i = 0; resp->headers[i + 1]; i++)
747 const char *b = resp->headers[i];
748 const char *e = resp->headers[i + 1];
750 if (b < e && e[-1] == '\n')
752 if (b < e && e[-1] == '\r')
754 /* This is safe even on printfs with broken handling of "%.<n>s"
755 because resp->headers ends with \0. */
756 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, e - b, b);
760 /* Parse the `Content-Range' header and extract the information it
761 contains. Returns true if successful, false otherwise. */
763 parse_content_range (const char *hdr, wgint *first_byte_ptr,
764 wgint *last_byte_ptr, wgint *entity_length_ptr)
768 /* Ancient versions of Netscape proxy server, presumably predating
769 rfc2068, sent out `Content-Range' without the "bytes"
771 if (0 == strncasecmp (hdr, "bytes", 5))
774 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
778 while (ISSPACE (*hdr))
785 for (num = 0; ISDIGIT (*hdr); hdr++)
786 num = 10 * num + (*hdr - '0');
787 if (*hdr != '-' || !ISDIGIT (*(hdr + 1)))
789 *first_byte_ptr = num;
791 for (num = 0; ISDIGIT (*hdr); hdr++)
792 num = 10 * num + (*hdr - '0');
793 if (*hdr != '/' || !ISDIGIT (*(hdr + 1)))
795 *last_byte_ptr = num;
797 for (num = 0; ISDIGIT (*hdr); hdr++)
798 num = 10 * num + (*hdr - '0');
799 *entity_length_ptr = num;
803 /* Read the body of the request, but don't store it anywhere and don't
804 display a progress gauge. This is useful for reading the bodies of
805 administrative responses to which we will soon issue another
806 request. The response is not useful to the user, but reading it
807 allows us to continue using the same connection to the server.
809 If reading fails, false is returned, true otherwise. In debug
810 mode, the body is displayed for debugging purposes. */
813 skip_short_body (int fd, wgint contlen)
816 SKIP_SIZE = 512, /* size of the download buffer */
817 SKIP_THRESHOLD = 4096 /* the largest size we read */
819 char dlbuf[SKIP_SIZE + 1];
820 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
822 /* We shouldn't get here with unknown contlen. (This will change
823 with HTTP/1.1, which supports "chunked" transfer.) */
824 assert (contlen != -1);
826 /* If the body is too large, it makes more sense to simply close the
827 connection than to try to read the body. */
828 if (contlen > SKIP_THRESHOLD)
831 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
835 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
838 /* Don't normally report the error since this is an
839 optimization that should be invisible to the user. */
840 DEBUGP (("] aborting (%s).\n",
841 ret < 0 ? fd_errstr (fd) : "EOF received"));
845 /* Safe even if %.*s bogusly expects terminating \0 because
846 we've zero-terminated dlbuf above. */
847 DEBUGP (("%.*s", ret, dlbuf));
850 DEBUGP (("] done.\n"));
854 /* Persistent connections. Currently, we cache the most recently used
855 connection as persistent, provided that the HTTP server agrees to
856 make it such. The persistence data is stored in the variables
857 below. Ideally, it should be possible to cache an arbitrary fixed
858 number of these connections. */
860 /* Whether a persistent connection is active. */
861 static bool pconn_active;
864 /* The socket of the connection. */
867 /* Host and port of the currently active persistent connection. */
871 /* Whether a ssl handshake has occoured on this connection. */
874 /* Whether the connection was authorized. This is only done by
875 NTLM, which authorizes *connections* rather than individual
876 requests. (That practice is peculiar for HTTP, but it is a
877 useful optimization.) */
881 /* NTLM data of the current connection. */
882 struct ntlmdata ntlm;
886 /* Mark the persistent connection as invalid and free the resources it
887 uses. This is used by the CLOSE_* macros after they forcefully
888 close a registered persistent connection. */
891 invalidate_persistent (void)
893 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
894 pconn_active = false;
895 fd_close (pconn.socket);
900 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
901 persistent. This will enable someone to use the same connection
902 later. In the context of HTTP, this must be called only AFTER the
903 response has been received and the server has promised that the
904 connection will remain alive.
906 If a previous connection was persistent, it is closed. */
909 register_persistent (const char *host, int port, int fd, bool ssl)
913 if (pconn.socket == fd)
915 /* The connection FD is already registered. */
920 /* The old persistent connection is still active; close it
921 first. This situation arises whenever a persistent
922 connection exists, but we then connect to a different
923 host, and try to register a persistent connection to that
925 invalidate_persistent ();
931 pconn.host = xstrdup (host);
934 pconn.authorized = false;
936 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
939 /* Return true if a persistent connection is available for connecting
943 persistent_available_p (const char *host, int port, bool ssl,
944 bool *host_lookup_failed)
946 /* First, check whether a persistent connection is active at all. */
950 /* If we want SSL and the last connection wasn't or vice versa,
951 don't use it. Checking for host and port is not enough because
952 HTTP and HTTPS can apparently coexist on the same port. */
953 if (ssl != pconn.ssl)
956 /* If we're not connecting to the same port, we're not interested. */
957 if (port != pconn.port)
960 /* If the host is the same, we're in business. If not, there is
961 still hope -- read below. */
962 if (0 != strcasecmp (host, pconn.host))
964 /* Check if pconn.socket is talking to HOST under another name.
965 This happens often when both sites are virtual hosts
966 distinguished only by name and served by the same network
967 interface, and hence the same web server (possibly set up by
968 the ISP and serving many different web sites). This
969 admittedly unconventional optimization does not contradict
970 HTTP and works well with popular server software. */
974 struct address_list *al;
977 /* Don't try to talk to two different SSL sites over the same
978 secure connection! (Besides, it's not clear that
979 name-based virtual hosting is even possible with SSL.) */
982 /* If pconn.socket's peer is one of the IP addresses HOST
983 resolves to, pconn.socket is for all intents and purposes
984 already talking to HOST. */
986 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
988 /* Can't get the peer's address -- something must be very
989 wrong with the connection. */
990 invalidate_persistent ();
993 al = lookup_host (host, 0);
996 *host_lookup_failed = true;
1000 found = address_list_contains (al, &ip);
1001 address_list_release (al);
1006 /* The persistent connection's peer address was found among the
1007 addresses HOST resolved to; therefore, pconn.sock is in fact
1008 already talking to HOST -- no need to reconnect. */
1011 /* Finally, check whether the connection is still open. This is
1012 important because most servers implement liberal (short) timeout
1013 on persistent connections. Wget can of course always reconnect
1014 if the connection doesn't work out, but it's nicer to know in
1015 advance. This test is a logical followup of the first test, but
1016 is "expensive" and therefore placed at the end of the list.
1018 (Current implementation of test_socket_open has a nice side
1019 effect that it treats sockets with pending data as "closed".
1020 This is exactly what we want: if a broken server sends message
1021 body in response to HEAD, or if it sends more than conent-length
1022 data, we won't reuse the corrupted connection.) */
1024 if (!test_socket_open (pconn.socket))
1026 /* Oops, the socket is no longer open. Now that we know that,
1027 let's invalidate the persistent connection before returning
1029 invalidate_persistent ();
1036 /* The idea behind these two CLOSE macros is to distinguish between
1037 two cases: one when the job we've been doing is finished, and we
1038 want to close the connection and leave, and two when something is
1039 seriously wrong and we're closing the connection as part of
1042 In case of keep_alive, CLOSE_FINISH should leave the connection
1043 open, while CLOSE_INVALIDATE should still close it.
1045 Note that the semantics of the flag `keep_alive' is "this
1046 connection *will* be reused (the server has promised not to close
1047 the connection once we're done)", while the semantics of
1048 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1049 active, registered connection". */
1051 #define CLOSE_FINISH(fd) do { \
1054 if (pconn_active && (fd) == pconn.socket) \
1055 invalidate_persistent (); \
1064 #define CLOSE_INVALIDATE(fd) do { \
1065 if (pconn_active && (fd) == pconn.socket) \
1066 invalidate_persistent (); \
1074 wgint len; /* received length */
1075 wgint contlen; /* expected length */
1076 wgint restval; /* the restart value */
1077 int res; /* the result of last read */
1078 const char *errstr; /* error message from read error */
1079 char *newloc; /* new location (redirection) */
1080 char *remote_time; /* remote time-stamp string */
1081 char *error; /* textual HTTP error */
1082 int statcode; /* status code */
1083 wgint rd_size; /* amount of data read from socket */
1084 double dltime; /* time it took to download the data */
1085 const char *referer; /* value of the referer header. */
1086 char **local_file; /* local file. */
1090 free_hstat (struct http_stat *hs)
1092 xfree_null (hs->newloc);
1093 xfree_null (hs->remote_time);
1094 xfree_null (hs->error);
1096 /* Guard against being called twice. */
1098 hs->remote_time = NULL;
1102 static char *create_authorization_line (const char *, const char *,
1103 const char *, const char *,
1104 const char *, bool *);
1105 static char *basic_authentication_encode (const char *, const char *);
1106 static bool known_authentication_scheme_p (const char *, const char *);
1108 #define BEGINS_WITH(line, string_constant) \
1109 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1110 && (ISSPACE (line[sizeof (string_constant) - 1]) \
1111 || !line[sizeof (string_constant) - 1]))
1113 #define SET_USER_AGENT(req) do { \
1114 if (!opt.useragent) \
1115 request_set_header (req, "User-Agent", \
1116 aprintf ("Wget/%s", version_string), rel_value); \
1117 else if (*opt.useragent) \
1118 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1121 /* The flags that allow clobbering the file (opening with "wb").
1122 Defined here to avoid repetition later. #### This will require
1124 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1125 || opt.dirstruct || opt.output_document)
1127 /* Retrieve a document through HTTP protocol. It recognizes status
1128 code, and correctly handles redirections. It closes the network
1129 socket. If it receives an error from the functions below it, it
1130 will print it if there is enough information to do so (almost
1131 always), returning the error to the caller (i.e. http_loop).
1133 Various HTTP parameters are stored to hs.
1135 If PROXY is non-NULL, the connection will be made to the proxy
1136 server, and u->url will be requested. */
1138 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1140 struct request *req;
1143 char *user, *passwd;
1147 wgint contlen, contrange;
1154 /* Set to 1 when the authorization has failed permanently and should
1155 not be tried again. */
1156 bool auth_finished = false;
1158 /* Whether NTLM authentication is used for this request. */
1159 bool ntlm_seen = false;
1161 /* Whether our connection to the remote host is through SSL. */
1162 bool using_ssl = false;
1164 /* Whether a HEAD request will be issued (as opposed to GET or
1166 bool head_only = !!(*dt & HEAD_ONLY);
1169 struct response *resp;
1173 /* Whether this connection will be kept alive after the HTTP request
1177 /* Whether keep-alive should be inhibited.
1179 RFC 2068 requests that 1.0 clients not send keep-alive requests
1180 to proxies. This is because many 1.0 proxies do not interpret
1181 the Connection header and transfer it to the remote server,
1182 causing it to not close the connection and leave both the proxy
1183 and the client hanging. */
1184 bool inhibit_keep_alive =
1185 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1187 /* Headers sent when using POST. */
1188 wgint post_data_size = 0;
1190 bool host_lookup_failed = false;
1193 if (u->scheme == SCHEME_HTTPS)
1195 /* Initialize the SSL context. After this has once been done,
1196 it becomes a no-op. */
1199 scheme_disable (SCHEME_HTTPS);
1200 logprintf (LOG_NOTQUIET,
1201 _("Disabling SSL due to encountered errors.\n"));
1202 return SSLINITFAILED;
1205 #endif /* HAVE_SSL */
1208 /* If we're doing a GET on the URL, as opposed to just a HEAD, we need to
1209 know the local filename so we can save to it. */
1210 assert (*hs->local_file != NULL);
1212 /* Initialize certain elements of struct http_stat. */
1218 hs->remote_time = NULL;
1223 /* Prepare the request to send. */
1225 req = request_new ();
1228 const char *meth = "GET";
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". */
1238 /* When using SSL over proxy, CONNECT establishes a direct
1239 connection to the HTTPS server. Therefore use the same
1240 argument as when talking to the server directly. */
1241 && u->scheme != SCHEME_HTTPS
1244 meth_arg = xstrdup (u->url);
1246 meth_arg = url_full_path (u);
1247 request_set_method (req, meth, meth_arg);
1250 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1251 if (*dt & SEND_NOCACHE)
1252 request_set_header (req, "Pragma", "no-cache", rel_none);
1254 request_set_header (req, "Range",
1255 aprintf ("bytes=%s-",
1256 number_to_static_string (hs->restval)),
1258 SET_USER_AGENT (req);
1259 request_set_header (req, "Accept", "*/*", rel_none);
1261 /* Find the username and password for authentication. */
1264 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1265 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1266 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1270 /* We have the username and the password, but haven't tried
1271 any authorization yet. Let's see if the "Basic" method
1272 works. If not, we'll come back here and construct a
1273 proper authorization method with the right challenges.
1275 If we didn't employ this kind of logic, every URL that
1276 requires authorization would have to be processed twice,
1277 which is very suboptimal and generates a bunch of false
1278 "unauthorized" errors in the server log.
1280 #### But this logic also has a serious problem when used
1281 with stronger authentications: we *first* transmit the
1282 username and the password in clear text, and *then* attempt a
1283 stronger authentication scheme. That cannot be right! We
1284 are only fortunate that almost everyone still uses the
1285 `Basic' scheme anyway.
1287 There should be an option to prevent this from happening, for
1288 those who use strong authentication schemes and value their
1290 request_set_header (req, "Authorization",
1291 basic_authentication_encode (user, passwd),
1298 char *proxy_user, *proxy_passwd;
1299 /* For normal username and password, URL components override
1300 command-line/wgetrc parameters. With proxy
1301 authentication, it's the reverse, because proxy URLs are
1302 normally the "permanent" ones, so command-line args
1303 should take precedence. */
1304 if (opt.proxy_user && opt.proxy_passwd)
1306 proxy_user = opt.proxy_user;
1307 proxy_passwd = opt.proxy_passwd;
1311 proxy_user = proxy->user;
1312 proxy_passwd = proxy->passwd;
1314 /* #### This does not appear right. Can't the proxy request,
1315 say, `Digest' authentication? */
1316 if (proxy_user && proxy_passwd)
1317 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1319 /* If we're using a proxy, we will be connecting to the proxy
1323 /* Proxy authorization over SSL is handled below. */
1325 if (u->scheme != SCHEME_HTTPS)
1327 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1330 /* Generate the Host header, HOST:PORT. Take into account that:
1332 - Broken server-side software often doesn't recognize the PORT
1333 argument, so we must generate "Host: www.server.com" instead of
1334 "Host: www.server.com:80" (and likewise for https port).
1336 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1337 becomes ambiguous and needs to be rewritten as "Host:
1338 [3ffe:8100:200:2::2]:1234". */
1340 /* Formats arranged for hfmt[add_port][add_squares]. */
1341 static const char *hfmt[][2] = {
1342 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1344 int add_port = u->port != scheme_default_port (u->scheme);
1345 int add_squares = strchr (u->host, ':') != NULL;
1346 request_set_header (req, "Host",
1347 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1351 if (!inhibit_keep_alive)
1352 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1355 request_set_header (req, "Cookie",
1356 cookie_header (wget_cookie_jar,
1357 u->host, u->port, u->path,
1359 u->scheme == SCHEME_HTTPS
1366 if (opt.post_data || opt.post_file_name)
1368 request_set_header (req, "Content-Type",
1369 "application/x-www-form-urlencoded", rel_none);
1371 post_data_size = strlen (opt.post_data);
1374 post_data_size = file_size (opt.post_file_name);
1375 if (post_data_size == -1)
1377 logprintf (LOG_NOTQUIET, _("POST data file `%s' missing: %s\n"),
1378 opt.post_file_name, strerror (errno));
1382 request_set_header (req, "Content-Length",
1383 xstrdup (number_to_static_string (post_data_size)),
1387 /* Add the user headers. */
1388 if (opt.user_headers)
1391 for (i = 0; opt.user_headers[i]; i++)
1392 request_set_user_header (req, opt.user_headers[i]);
1396 /* We need to come back here when the initial attempt to retrieve
1397 without authorization header fails. (Expected to happen at least
1398 for the Digest authorization scheme.) */
1402 /* Establish the connection. */
1404 if (!inhibit_keep_alive)
1406 /* Look for a persistent connection to target host, unless a
1407 proxy is used. The exception is when SSL is in use, in which
1408 case the proxy is nothing but a passthrough to the target
1409 host, registered as a connection to the latter. */
1410 struct url *relevant = conn;
1412 if (u->scheme == SCHEME_HTTPS)
1416 if (persistent_available_p (relevant->host, relevant->port,
1418 relevant->scheme == SCHEME_HTTPS,
1422 &host_lookup_failed))
1424 sock = pconn.socket;
1425 using_ssl = pconn.ssl;
1426 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1427 escnonprint (pconn.host), pconn.port);
1428 DEBUGP (("Reusing fd %d.\n", sock));
1429 if (pconn.authorized)
1430 /* If the connection is already authorized, the "Basic"
1431 authorization added by code above is unnecessary and
1433 request_remove_header (req, "Authorization");
1439 /* In its current implementation, persistent_available_p will
1440 look up conn->host in some cases. If that lookup failed, we
1441 don't need to bother with connect_to_host. */
1442 if (host_lookup_failed)
1448 sock = connect_to_host (conn->host, conn->port);
1457 return (retryable_socket_connect_error (errno)
1458 ? CONERROR : CONIMPOSSIBLE);
1462 if (proxy && u->scheme == SCHEME_HTTPS)
1464 /* When requesting SSL URLs through proxies, use the
1465 CONNECT method to request passthrough. */
1466 struct request *connreq = request_new ();
1467 request_set_method (connreq, "CONNECT",
1468 aprintf ("%s:%d", u->host, u->port));
1469 SET_USER_AGENT (connreq);
1472 request_set_header (connreq, "Proxy-Authorization",
1473 proxyauth, rel_value);
1474 /* Now that PROXYAUTH is part of the CONNECT request,
1475 zero it out so we don't send proxy authorization with
1476 the regular request below. */
1479 /* Examples in rfc2817 use the Host header in CONNECT
1480 requests. I don't see how that gains anything, given
1481 that the contents of Host would be exactly the same as
1482 the contents of CONNECT. */
1484 write_error = request_send (connreq, sock);
1485 request_free (connreq);
1486 if (write_error < 0)
1488 logprintf (LOG_VERBOSE, _("Failed writing to proxy: %s.\n"),
1490 CLOSE_INVALIDATE (sock);
1494 head = read_http_response_head (sock);
1497 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1499 CLOSE_INVALIDATE (sock);
1508 DEBUGP (("proxy responded with: [%s]\n", head));
1510 resp = resp_new (head);
1511 statcode = resp_status (resp, &message);
1514 if (statcode != 200)
1517 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1518 message ? escnonprint (message) : "?");
1519 xfree_null (message);
1522 xfree_null (message);
1524 /* SOCK is now *really* connected to u->host, so update CONN
1525 to reflect this. That way register_persistent will
1526 register SOCK as being connected to u->host:u->port. */
1530 if (conn->scheme == SCHEME_HTTPS)
1532 if (!ssl_connect (sock) || !ssl_check_certificate (sock, u->host))
1539 #endif /* HAVE_SSL */
1542 /* Send the request to server. */
1543 write_error = request_send (req, sock);
1545 if (write_error >= 0)
1549 DEBUGP (("[POST data: %s]\n", opt.post_data));
1550 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1552 else if (opt.post_file_name && post_data_size != 0)
1553 write_error = post_file (sock, opt.post_file_name, post_data_size);
1556 if (write_error < 0)
1558 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
1560 CLOSE_INVALIDATE (sock);
1564 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1565 proxy ? "Proxy" : "HTTP");
1570 head = read_http_response_head (sock);
1575 logputs (LOG_NOTQUIET, _("No data received.\n"));
1576 CLOSE_INVALIDATE (sock);
1582 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1584 CLOSE_INVALIDATE (sock);
1589 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1591 resp = resp_new (head);
1593 /* Check for status line. */
1595 statcode = resp_status (resp, &message);
1596 if (!opt.server_response)
1597 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1598 message ? escnonprint (message) : "");
1601 logprintf (LOG_VERBOSE, "\n");
1602 print_server_response (resp, " ");
1605 if (!opt.ignore_length
1606 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1610 parsed = str_to_wgint (hdrval, NULL, 10);
1611 if (parsed == WGINT_MAX && errno == ERANGE)
1613 #### If Content-Length is out of range, it most likely
1614 means that the file is larger than 2G and that we're
1615 compiled without LFS. In that case we should probably
1616 refuse to even attempt to download the file. */
1622 /* Check for keep-alive related responses. */
1623 if (!inhibit_keep_alive && contlen != -1)
1625 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1627 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1629 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1634 /* The server has promised that it will not close the connection
1635 when we're done. This means that we can register it. */
1636 register_persistent (conn->host, conn->port, sock, using_ssl);
1638 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1640 /* Authorization is required. */
1641 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1642 CLOSE_FINISH (sock);
1644 CLOSE_INVALIDATE (sock);
1645 pconn.authorized = false;
1646 if (!auth_finished && (user && passwd))
1648 /* IIS sends multiple copies of WWW-Authenticate, one with
1649 the value "negotiate", and other(s) with data. Loop over
1650 all the occurrences and pick the one we recognize. */
1652 const char *wabeg, *waend;
1653 char *www_authenticate = NULL;
1655 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1656 &wabeg, &waend)) != -1;
1658 if (known_authentication_scheme_p (wabeg, waend))
1660 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
1664 if (!www_authenticate)
1665 /* If the authentication header is missing or
1666 unrecognized, there's no sense in retrying. */
1667 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1668 else if (BEGINS_WITH (www_authenticate, "Basic"))
1669 /* If the authentication scheme is "Basic", which we send
1670 by default, there's no sense in retrying either. (This
1671 should be changed when we stop sending "Basic" data by
1677 pth = url_full_path (u);
1678 request_set_header (req, "Authorization",
1679 create_authorization_line (www_authenticate,
1681 request_method (req),
1685 if (BEGINS_WITH (www_authenticate, "NTLM"))
1688 goto retry_with_auth;
1691 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
1695 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
1697 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
1699 pconn.authorized = true;
1703 hs->statcode = statcode;
1705 hs->error = xstrdup (_("Malformed status line"));
1707 hs->error = xstrdup (_("(no description)"));
1709 hs->error = xstrdup (message);
1712 type = resp_header_strdup (resp, "Content-Type");
1715 char *tmp = strchr (type, ';');
1718 while (tmp > type && ISSPACE (tmp[-1]))
1723 hs->newloc = resp_header_strdup (resp, "Location");
1724 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
1726 /* Handle (possibly multiple instances of) the Set-Cookie header. */
1730 const char *scbeg, *scend;
1731 /* The jar should have been created by now. */
1732 assert (wget_cookie_jar != NULL);
1734 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
1735 &scbeg, &scend)) != -1;
1738 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
1739 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
1740 u->path, set_cookie);
1744 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
1746 wgint first_byte_pos, last_byte_pos, entity_length;
1747 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
1749 contrange = first_byte_pos;
1753 /* 20x responses are counted among successful by default. */
1754 if (H_20X (statcode))
1757 /* Return if redirected. */
1758 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
1760 /* RFC2068 says that in case of the 300 (multiple choices)
1761 response, the server can output a preferred URL through
1762 `Location' header; otherwise, the request should be treated
1763 like GET. So, if the location is set, it will be a
1764 redirection; otherwise, just proceed normally. */
1765 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
1769 logprintf (LOG_VERBOSE,
1770 _("Location: %s%s\n"),
1771 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
1772 hs->newloc ? _(" [following]") : "");
1773 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1774 CLOSE_FINISH (sock);
1776 CLOSE_INVALIDATE (sock);
1782 /* If content-type is not given, assume text/html. This is because
1783 of the multitude of broken CGI's that "forget" to generate the
1786 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
1787 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
1792 if (opt.html_extension && (*dt & TEXTHTML))
1793 /* -E / --html-extension / html_extension = on was specified, and this is a
1794 text/html file. If some case-insensitive variation on ".htm[l]" isn't
1795 already the file's suffix, tack on ".html". */
1797 char *last_period_in_local_filename = strrchr (*hs->local_file, '.');
1799 if (last_period_in_local_filename == NULL
1800 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
1801 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
1803 int local_filename_len = strlen (*hs->local_file);
1804 /* Resize the local file, allowing for ".html" preceded by
1805 optional ".NUMBER". */
1806 *hs->local_file = xrealloc (*hs->local_file,
1807 local_filename_len + 24 + sizeof (".html"));
1808 strcpy(*hs->local_file + local_filename_len, ".html");
1809 /* If clobbering is not allowed and the file, as named,
1810 exists, tack on ".NUMBER.html" instead. */
1815 sprintf (*hs->local_file + local_filename_len,
1816 ".%d.html", ext_num++);
1817 while (file_exists_p (*hs->local_file));
1819 *dt |= ADDED_HTML_EXTENSION;
1823 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
1825 /* If `-c' is in use and the file has been fully downloaded (or
1826 the remote file has shrunk), Wget effectively requests bytes
1827 after the end of file and the server response with 416. */
1828 logputs (LOG_VERBOSE, _("\
1829 \n The file is already fully retrieved; nothing to do.\n\n"));
1830 /* In case the caller inspects. */
1833 /* Mark as successfully retrieved. */
1836 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
1837 might be more bytes in the body. */
1838 return RETRUNNEEDED;
1840 if ((contrange != 0 && contrange != hs->restval)
1841 || (H_PARTIAL (statcode) && !contrange))
1843 /* The Range request was somehow misunderstood by the server.
1846 CLOSE_INVALIDATE (sock);
1849 hs->contlen = contlen + contrange;
1855 /* No need to print this output if the body won't be
1856 downloaded at all, or if the original server response is
1858 logputs (LOG_VERBOSE, _("Length: "));
1861 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
1862 if (contlen + contrange >= 1024)
1863 logprintf (LOG_VERBOSE, " (%s)",
1864 human_readable (contlen + contrange));
1867 if (contlen >= 1024)
1868 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
1869 number_to_static_string (contlen),
1870 human_readable (contlen));
1872 logprintf (LOG_VERBOSE, _(", %s remaining"),
1873 number_to_static_string (contlen));
1877 logputs (LOG_VERBOSE,
1878 opt.ignore_length ? _("ignored") : _("unspecified"));
1880 logprintf (LOG_VERBOSE, " [%s]\n", escnonprint (type));
1882 logputs (LOG_VERBOSE, "\n");
1886 type = NULL; /* We don't need it any more. */
1888 /* Return if we have no intention of further downloading. */
1889 if (!(*dt & RETROKF) || head_only)
1891 /* In case the caller cares to look... */
1896 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
1897 servers not to send body in response to a HEAD request, and
1898 those that do will likely be caught by test_socket_open.
1899 If not, they can be worked around using
1900 `--no-http-keep-alive'. */
1901 CLOSE_FINISH (sock);
1902 else if (keep_alive && skip_short_body (sock, contlen))
1903 /* Successfully skipped the body; also keep using the socket. */
1904 CLOSE_FINISH (sock);
1906 CLOSE_INVALIDATE (sock);
1907 return RETRFINISHED;
1910 /* Open the local file. */
1913 mkalldirs (*hs->local_file);
1915 rotate_backups (*hs->local_file);
1917 fp = fopen (*hs->local_file, "ab");
1918 else if (ALLOW_CLOBBER)
1919 fp = fopen (*hs->local_file, "wb");
1922 fp = fopen_excl (*hs->local_file, true);
1923 if (!fp && errno == EEXIST)
1925 /* We cannot just invent a new name and use it (which is
1926 what functions like unique_create typically do)
1927 because we told the user we'd use this name.
1928 Instead, return and retry the download. */
1929 logprintf (LOG_NOTQUIET,
1930 _("%s has sprung into existence.\n"),
1932 CLOSE_INVALIDATE (sock);
1933 return FOPEN_EXCL_ERR;
1938 logprintf (LOG_NOTQUIET, "%s: %s\n", *hs->local_file, strerror (errno));
1939 CLOSE_INVALIDATE (sock);
1946 /* #### This confuses the timestamping code that checks for file
1947 size. Maybe we should save some additional information? */
1948 if (opt.save_headers)
1949 fwrite (head, 1, strlen (head), fp);
1951 /* Now we no longer need to store the response header. */
1954 /* Download the request body. */
1957 flags |= rb_read_exactly;
1958 if (hs->restval > 0 && contrange == 0)
1959 /* If the server ignored our range request, instruct fd_read_body
1960 to skip the first RESTVAL bytes of body. */
1961 flags |= rb_skip_startpos;
1962 hs->len = hs->restval;
1964 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
1965 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
1969 CLOSE_FINISH (sock);
1973 hs->errstr = fd_errstr (sock);
1974 CLOSE_INVALIDATE (sock);
1981 return RETRFINISHED;
1984 /* The genuine HTTP loop! This is the part where the retrieval is
1985 retried, and retried, and retried, and... */
1987 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
1988 int *dt, struct url *proxy)
1991 bool use_ts, got_head = false;/* time-stamping info */
1992 char *filename_plus_orig_suffix;
1993 char *local_filename = NULL;
1997 time_t tml = -1, tmr = -1; /* local and remote time-stamps */
1998 wgint local_size = 0; /* the size of the local file */
1999 size_t filename_len;
2000 struct http_stat hstat; /* HTTP status */
2004 /* This used to be done in main(), but it's a better idea to do it
2005 here so that we don't go through the hoops if we're just using
2009 if (!wget_cookie_jar)
2010 wget_cookie_jar = cookie_jar_new ();
2011 if (opt.cookies_input && !cookies_loaded_p)
2013 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
2014 cookies_loaded_p = true;
2020 /* Warn on (likely bogus) wildcard usage in HTTP. */
2021 if (opt.ftp_glob && has_wildcards_p (u->path))
2022 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2026 /* Determine the local filename. */
2027 if (local_file && *local_file)
2028 hstat.local_file = local_file;
2029 else if (local_file && !opt.output_document)
2031 *local_file = url_file_name (u);
2032 hstat.local_file = local_file;
2036 dummy = url_file_name (u);
2037 hstat.local_file = &dummy;
2038 /* be honest about where we will save the file */
2039 if (local_file && opt.output_document)
2040 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2043 if (!opt.output_document)
2044 locf = *hstat.local_file;
2046 locf = opt.output_document;
2048 hstat.referer = referer;
2050 filename_len = strlen (*hstat.local_file);
2051 filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
2053 if (opt.noclobber && file_exists_p (*hstat.local_file))
2055 /* If opt.noclobber is turned on and file already exists, do not
2056 retrieve the file */
2057 logprintf (LOG_VERBOSE, _("\
2058 File `%s' already there; not retrieving.\n\n"), *hstat.local_file);
2059 /* If the file is there, we suppose it's retrieved OK. */
2062 /* #### Bogusness alert. */
2063 /* If its suffix is "html" or "htm" or similar, assume text/html. */
2064 if (has_html_suffix_p (*hstat.local_file))
2072 if (opt.timestamping)
2074 bool local_dot_orig_file_exists = false;
2076 if (opt.backup_converted)
2077 /* If -K is specified, we'll act on the assumption that it was specified
2078 last time these files were downloaded as well, and instead of just
2079 comparing local file X against server file X, we'll compare local
2080 file X.orig (if extant, else X) against server file X. If -K
2081 _wasn't_ specified last time, or the server contains files called
2082 *.orig, -N will be back to not operating correctly with -k. */
2084 /* Would a single s[n]printf() call be faster? --dan
2086 Definitely not. sprintf() is horribly slow. It's a
2087 different question whether the difference between the two
2088 affects a program. Usually I'd say "no", but at one
2089 point I profiled Wget, and found that a measurable and
2090 non-negligible amount of time was lost calling sprintf()
2091 in url.c. Replacing sprintf with inline calls to
2092 strcpy() and number_to_string() made a difference.
2094 memcpy (filename_plus_orig_suffix, *hstat.local_file, filename_len);
2095 memcpy (filename_plus_orig_suffix + filename_len,
2096 ".orig", sizeof (".orig"));
2098 /* Try to stat() the .orig file. */
2099 if (stat (filename_plus_orig_suffix, &st) == 0)
2101 local_dot_orig_file_exists = 1;
2102 local_filename = filename_plus_orig_suffix;
2106 if (!local_dot_orig_file_exists)
2107 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2108 if (stat (*hstat.local_file, &st) == 0)
2109 local_filename = *hstat.local_file;
2111 if (local_filename != NULL)
2112 /* There was a local file, so we'll check later to see if the version
2113 the server has is the same version we already have, allowing us to
2119 /* Modification time granularity is 2 seconds for Windows, so
2120 increase local time by 1 second for later comparison. */
2123 local_size = st.st_size;
2127 /* Reset the counter. */
2133 /* Increment the pass counter. */
2135 sleep_between_retrievals (count);
2136 /* Get the current time string. */
2137 tms = time_str (NULL);
2138 /* Print fetch message, if opt.verbose. */
2141 char *hurl = url_string (u, true);
2145 sprintf (tmp, _("(try:%2d)"), count);
2146 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
2147 tms, hurl, tmp, locf);
2149 ws_changetitle (hurl);
2154 /* Default document type is empty. However, if spider mode is
2155 on or time-stamping is employed, HEAD_ONLY commands is
2156 encoded within *dt. */
2157 if (opt.spider || (use_ts && !got_head))
2162 /* Decide whether or not to restart. */
2164 && stat (locf, &st) == 0
2165 && S_ISREG (st.st_mode))
2166 /* When -c is used, continue from on-disk size. (Can't use
2167 hstat.len even if count>1 because we don't want a failed
2168 first attempt to clobber existing data.) */
2169 hstat.restval = st.st_size;
2171 /* otherwise, continue where the previous try left off */
2172 hstat.restval = hstat.len;
2176 /* Decide whether to send the no-cache directive. We send it in
2178 a) we're using a proxy, and we're past our first retrieval.
2179 Some proxies are notorious for caching incomplete data, so
2180 we require a fresh get.
2181 b) caching is explicitly inhibited. */
2182 if ((proxy && count > 1) /* a */
2183 || !opt.allow_cache /* b */
2185 *dt |= SEND_NOCACHE;
2187 *dt &= ~SEND_NOCACHE;
2189 /* Try fetching the document, or at least its head. */
2190 err = gethttp (u, &hstat, dt, proxy);
2192 /* It's unfortunate that wget determines the local filename before finding
2193 out the Content-Type of the file. Barring a major restructuring of the
2194 code, we need to re-set locf here, since gethttp() may have xrealloc()d
2195 *hstat.local_file to tack on ".html". */
2196 if (!opt.output_document)
2197 locf = *hstat.local_file;
2200 tms = time_str (NULL);
2201 /* Get the new location (with or without the redirection). */
2203 *newloc = xstrdup (hstat.newloc);
2206 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2207 case CONERROR: case READERR: case WRITEFAILED:
2208 case RANGEERR: case FOPEN_EXCL_ERR:
2209 /* Non-fatal errors continue executing the loop, which will
2210 bring them to "while" statement at the end, to judge
2211 whether the number of tries was exceeded. */
2212 free_hstat (&hstat);
2213 printwhat (count, opt.ntry);
2214 if (err == FOPEN_EXCL_ERR)
2216 /* Re-determine the file name. */
2217 if (local_file && *local_file)
2219 xfree (*local_file);
2220 *local_file = url_file_name (u);
2221 hstat.local_file = local_file;
2226 dummy = url_file_name (u);
2227 hstat.local_file = &dummy;
2229 /* be honest about where we will save the file */
2230 if (local_file && opt.output_document)
2231 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2232 if (!opt.output_document)
2233 locf = *hstat.local_file;
2235 locf = opt.output_document;
2238 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2239 case SSLINITFAILED: case CONTNOTSUPPORTED:
2240 /* Fatal errors just return from the function. */
2241 free_hstat (&hstat);
2244 case FWRITEERR: case FOPENERR:
2245 /* Another fatal error. */
2246 logputs (LOG_VERBOSE, "\n");
2247 logprintf (LOG_NOTQUIET, _("Cannot write to `%s' (%s).\n"),
2248 *hstat.local_file, strerror (errno));
2249 free_hstat (&hstat);
2253 /* Another fatal error. */
2254 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2255 free_hstat (&hstat);
2259 /* Return the new location to the caller. */
2262 logprintf (LOG_NOTQUIET,
2263 _("ERROR: Redirection (%d) without location.\n"),
2265 free_hstat (&hstat);
2269 free_hstat (&hstat);
2273 /* The file was already fully retrieved. */
2274 free_hstat (&hstat);
2278 /* Deal with you later. */
2281 /* All possibilities should have been exhausted. */
2284 if (!(*dt & RETROKF))
2288 /* #### Ugly ugly ugly! */
2289 char *hurl = url_string (u, true);
2290 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2293 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2294 tms, hstat.statcode, escnonprint (hstat.error));
2295 logputs (LOG_VERBOSE, "\n");
2296 free_hstat (&hstat);
2301 /* Did we get the time-stamp? */
2304 if (opt.timestamping && !hstat.remote_time)
2306 logputs (LOG_NOTQUIET, _("\
2307 Last-modified header missing -- time-stamps turned off.\n"));
2309 else if (hstat.remote_time)
2311 /* Convert the date-string into struct tm. */
2312 tmr = http_atotm (hstat.remote_time);
2313 if (tmr == (time_t) (-1))
2314 logputs (LOG_VERBOSE, _("\
2315 Last-modified header invalid -- time-stamp ignored.\n"));
2319 /* The time-stamping section. */
2324 use_ts = false; /* no more time-stamping */
2325 count = 0; /* the retrieve count for HEAD is
2327 if (hstat.remote_time && tmr != (time_t) (-1))
2329 /* Now time-stamping can be used validly. Time-stamping
2330 means that if the sizes of the local and remote file
2331 match, and local file is newer than the remote file,
2332 it will not be retrieved. Otherwise, the normal
2333 download procedure is resumed. */
2335 (hstat.contlen == -1 || local_size == hstat.contlen))
2337 logprintf (LOG_VERBOSE, _("\
2338 Server file no newer than local file `%s' -- not retrieving.\n\n"),
2340 free_hstat (&hstat);
2344 else if (tml >= tmr)
2345 logprintf (LOG_VERBOSE, _("\
2346 The sizes do not match (local %s) -- retrieving.\n"),
2347 number_to_static_string (local_size));
2349 logputs (LOG_VERBOSE,
2350 _("Remote file is newer, retrieving.\n"));
2352 free_hstat (&hstat);
2355 if ((tmr != (time_t) (-1))
2357 && ((hstat.len == hstat.contlen) ||
2358 ((hstat.res == 0) &&
2359 ((hstat.contlen == -1) ||
2360 (hstat.len >= hstat.contlen && !opt.kill_longer)))))
2362 /* #### This code repeats in http.c and ftp.c. Move it to a
2364 const char *fl = NULL;
2365 if (opt.output_document)
2367 if (output_stream_regular)
2368 fl = opt.output_document;
2371 fl = *hstat.local_file;
2375 /* End of time-stamping section. */
2379 logprintf (LOG_NOTQUIET, "%d %s\n\n", hstat.statcode,
2380 escnonprint (hstat.error));
2385 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
2386 total_download_time += hstat.dltime;
2388 if (hstat.len == hstat.contlen)
2392 logprintf (LOG_VERBOSE,
2393 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2395 number_to_static_string (hstat.len),
2396 number_to_static_string (hstat.contlen));
2397 logprintf (LOG_NONVERBOSE,
2398 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2400 number_to_static_string (hstat.len),
2401 number_to_static_string (hstat.contlen),
2405 total_downloaded_bytes += hstat.len;
2407 /* Remember that we downloaded the file for later ".orig" code. */
2408 if (*dt & ADDED_HTML_EXTENSION)
2409 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2411 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2413 free_hstat (&hstat);
2417 else if (hstat.res == 0) /* No read error */
2419 if (hstat.contlen == -1) /* We don't know how much we were supposed
2420 to get, so assume we succeeded. */
2424 logprintf (LOG_VERBOSE,
2425 _("%s (%s) - `%s' saved [%s]\n\n"),
2427 number_to_static_string (hstat.len));
2428 logprintf (LOG_NONVERBOSE,
2429 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2430 tms, u->url, number_to_static_string (hstat.len),
2434 total_downloaded_bytes += hstat.len;
2436 /* Remember that we downloaded the file for later ".orig" code. */
2437 if (*dt & ADDED_HTML_EXTENSION)
2438 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2440 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2442 free_hstat (&hstat);
2446 else if (hstat.len < hstat.contlen) /* meaning we lost the
2447 connection too soon */
2449 logprintf (LOG_VERBOSE,
2450 _("%s (%s) - Connection closed at byte %s. "),
2451 tms, tmrate, number_to_static_string (hstat.len));
2452 printwhat (count, opt.ntry);
2453 free_hstat (&hstat);
2456 else if (!opt.kill_longer) /* meaning we got more than expected */
2458 logprintf (LOG_VERBOSE,
2459 _("%s (%s) - `%s' saved [%s/%s]\n\n"),
2461 number_to_static_string (hstat.len),
2462 number_to_static_string (hstat.contlen));
2463 logprintf (LOG_NONVERBOSE,
2464 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2466 number_to_static_string (hstat.len),
2467 number_to_static_string (hstat.contlen),
2470 total_downloaded_bytes += hstat.len;
2472 /* Remember that we downloaded the file for later ".orig" code. */
2473 if (*dt & ADDED_HTML_EXTENSION)
2474 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, locf);
2476 downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
2478 free_hstat (&hstat);
2482 else /* the same, but not accepted */
2484 logprintf (LOG_VERBOSE,
2485 _("%s (%s) - Connection closed at byte %s/%s. "),
2487 number_to_static_string (hstat.len),
2488 number_to_static_string (hstat.contlen));
2489 printwhat (count, opt.ntry);
2490 free_hstat (&hstat);
2494 else /* now hstat.res can only be -1 */
2496 if (hstat.contlen == -1)
2498 logprintf (LOG_VERBOSE,
2499 _("%s (%s) - Read error at byte %s (%s)."),
2500 tms, tmrate, number_to_static_string (hstat.len),
2502 printwhat (count, opt.ntry);
2503 free_hstat (&hstat);
2506 else /* hstat.res == -1 and contlen is given */
2508 logprintf (LOG_VERBOSE,
2509 _("%s (%s) - Read error at byte %s/%s (%s). "),
2511 number_to_static_string (hstat.len),
2512 number_to_static_string (hstat.contlen),
2514 printwhat (count, opt.ntry);
2515 free_hstat (&hstat);
2521 while (!opt.ntry || (count < opt.ntry));
2525 /* Check whether the result of strptime() indicates success.
2526 strptime() returns the pointer to how far it got to in the string.
2527 The processing has been successful if the string is at `GMT' or
2528 `+X', or at the end of the string.
2530 In extended regexp parlance, the function returns 1 if P matches
2531 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2532 can return) is considered a failure and 0 is returned. */
2534 check_end (const char *p)
2538 while (ISSPACE (*p))
2541 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2542 || ((p[0] == '+' || p[0] == '-') && ISDIGIT (p[1])))
2548 /* Convert the textual specification of time in TIME_STRING to the
2549 number of seconds since the Epoch.
2551 TIME_STRING can be in any of the three formats RFC2616 allows the
2552 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
2553 as well as the time format used in the Set-Cookie header.
2554 Timezones are ignored, and should be GMT.
2556 Return the computed time_t representation, or -1 if the conversion
2559 This function uses strptime with various string formats for parsing
2560 TIME_STRING. This results in a parser that is not as lenient in
2561 interpreting TIME_STRING as I would like it to be. Being based on
2562 strptime, it always allows shortened months, one-digit days, etc.,
2563 but due to the multitude of formats in which time can be
2564 represented, an ideal HTTP time parser would be even more
2565 forgiving. It should completely ignore things like week days and
2566 concentrate only on the various forms of representing years,
2567 months, days, hours, minutes, and seconds. For example, it would
2568 be nice if it accepted ISO 8601 out of the box.
2570 I've investigated free and PD code for this purpose, but none was
2571 usable. getdate was big and unwieldy, and had potential copyright
2572 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2573 distributed with phttpd, is excellent, but we cannot use it because
2574 it is not assigned to the FSF. So I stuck it with strptime. */
2577 http_atotm (const char *time_string)
2579 /* NOTE: Solaris strptime man page claims that %n and %t match white
2580 space, but that's not universally available. Instead, we simply
2581 use ` ' to mean "skip all WS", which works under all strptime
2582 implementations I've tested. */
2584 static const char *time_formats[] = {
2585 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
2586 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
2587 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
2588 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
2589 (used in Set-Cookie, defined in the
2590 Netscape cookie specification.) */
2592 const char *oldlocale;
2594 time_t ret = (time_t) -1;
2596 /* Solaris strptime fails to recognize English month names in
2597 non-English locales, which we work around by temporarily setting
2598 locale to C before invoking strptime. */
2599 oldlocale = setlocale (LC_TIME, NULL);
2600 setlocale (LC_TIME, "C");
2602 for (i = 0; i < countof (time_formats); i++)
2606 /* Some versions of strptime use the existing contents of struct
2607 tm to recalculate the date according to format. Zero it out
2608 to prevent stack garbage from influencing strptime. */
2611 if (check_end (strptime (time_string, time_formats[i], &t)))
2618 /* Restore the previous locale. */
2619 setlocale (LC_TIME, oldlocale);
2624 /* Authorization support: We support three authorization schemes:
2626 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2628 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2629 consisting of answering to the server's challenge with the proper
2632 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2633 Stenberg for libcurl. Like digest, NTLM is based on a
2634 challenge-response mechanism, but unlike digest, it is non-standard
2635 (authenticates TCP connections rather than requests), undocumented
2636 and Microsoft-specific. */
2638 /* Create the authentication header contents for the `Basic' scheme.
2639 This is done by encoding the string "USER:PASS" to base64 and
2640 prepending the string "Basic " in front of it. */
2643 basic_authentication_encode (const char *user, const char *passwd)
2646 int len1 = strlen (user) + 1 + strlen (passwd);
2648 t1 = (char *)alloca (len1 + 1);
2649 sprintf (t1, "%s:%s", user, passwd);
2651 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
2652 base64_encode (t1, len1, t2);
2654 return concat_strings ("Basic ", t2, (char *) 0);
2657 #define SKIP_WS(x) do { \
2658 while (ISSPACE (*(x))) \
2662 #ifdef ENABLE_DIGEST
2663 /* Parse HTTP `WWW-Authenticate:' header. AU points to the beginning
2664 of a field in such a header. If the field is the one specified by
2665 ATTR_NAME ("realm", "opaque", and "nonce" are used by the current
2666 digest authorization code), extract its value in the (char*)
2667 variable pointed by RET. Returns negative on a malformed header,
2668 or number of bytes that have been parsed by this call. */
2670 extract_header_attr (const char *au, const char *attr_name, char **ret)
2673 const char *cp = au;
2675 if (strncmp (cp, attr_name, strlen (attr_name)) == 0)
2677 cp += strlen (attr_name);
2690 for (ep = cp; *ep && *ep != '\"'; ep++)
2695 *ret = strdupdelim (cp, ep);
2702 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
2703 an array of 16 bytes containing the hash keys, and BUF should be a
2704 buffer of 33 writable characters (32 for hex digits plus one for
2705 zero termination). */
2707 dump_hash (char *buf, const unsigned char *hash)
2711 for (i = 0; i < MD5_HASHLEN; i++, hash++)
2713 *buf++ = XNUM_TO_digit (*hash >> 4);
2714 *buf++ = XNUM_TO_digit (*hash & 0xf);
2719 /* Take the line apart to find the challenge, and compose a digest
2720 authorization header. See RFC2069 section 2.1.2. */
2722 digest_authentication_encode (const char *au, const char *user,
2723 const char *passwd, const char *method,
2726 static char *realm, *opaque, *nonce;
2731 { "realm", &realm },
2732 { "opaque", &opaque },
2737 realm = opaque = nonce = NULL;
2739 au += 6; /* skip over `Digest' */
2745 for (i = 0; i < countof (options); i++)
2747 int skip = extract_header_attr (au, options[i].name,
2748 options[i].variable);
2752 xfree_null (opaque);
2762 if (i == countof (options))
2764 while (*au && *au != '=')
2772 while (*au && *au != '\"')
2779 while (*au && *au != ',')
2784 if (!realm || !nonce || !user || !passwd || !path || !method)
2787 xfree_null (opaque);
2792 /* Calculate the digest value. */
2794 ALLOCA_MD5_CONTEXT (ctx);
2795 unsigned char hash[MD5_HASHLEN];
2796 char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
2797 char response_digest[MD5_HASHLEN * 2 + 1];
2799 /* A1BUF = H(user ":" realm ":" password) */
2801 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
2802 gen_md5_update ((unsigned char *)":", 1, ctx);
2803 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
2804 gen_md5_update ((unsigned char *)":", 1, ctx);
2805 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
2806 gen_md5_finish (ctx, hash);
2807 dump_hash (a1buf, hash);
2809 /* A2BUF = H(method ":" path) */
2811 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
2812 gen_md5_update ((unsigned char *)":", 1, ctx);
2813 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
2814 gen_md5_finish (ctx, hash);
2815 dump_hash (a2buf, hash);
2817 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
2819 gen_md5_update ((unsigned char *)a1buf, MD5_HASHLEN * 2, ctx);
2820 gen_md5_update ((unsigned char *)":", 1, ctx);
2821 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
2822 gen_md5_update ((unsigned char *)":", 1, ctx);
2823 gen_md5_update ((unsigned char *)a2buf, MD5_HASHLEN * 2, ctx);
2824 gen_md5_finish (ctx, hash);
2825 dump_hash (response_digest, hash);
2827 res = xmalloc (strlen (user)
2832 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
2833 + (opaque ? strlen (opaque) : 0)
2835 sprintf (res, "Digest \
2836 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
2837 user, realm, nonce, path, response_digest);
2840 char *p = res + strlen (res);
2841 strcat (p, ", opaque=\"");
2848 #endif /* ENABLE_DIGEST */
2850 /* Computing the size of a string literal must take into account that
2851 value returned by sizeof includes the terminating \0. */
2852 #define STRSIZE(literal) (sizeof (literal) - 1)
2854 /* Whether chars in [b, e) begin with the literal string provided as
2855 first argument and are followed by whitespace or terminating \0.
2856 The comparison is case-insensitive. */
2857 #define STARTS(literal, b, e) \
2858 ((e) - (b) >= STRSIZE (literal) \
2859 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
2860 && ((e) - (b) == STRSIZE (literal) \
2861 || ISSPACE (b[STRSIZE (literal)])))
2864 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
2866 return STARTS ("Basic", hdrbeg, hdrend)
2867 #ifdef ENABLE_DIGEST
2868 || STARTS ("Digest", hdrbeg, hdrend)
2871 || STARTS ("NTLM", hdrbeg, hdrend)
2878 /* Create the HTTP authorization request header. When the
2879 `WWW-Authenticate' response header is seen, according to the
2880 authorization scheme specified in that header (`Basic' and `Digest'
2881 are supported by the current implementation), produce an
2882 appropriate HTTP authorization request header. */
2884 create_authorization_line (const char *au, const char *user,
2885 const char *passwd, const char *method,
2886 const char *path, bool *finished)
2888 /* We are called only with known schemes, so we can dispatch on the
2890 switch (TOUPPER (*au))
2892 case 'B': /* Basic */
2894 return basic_authentication_encode (user, passwd);
2895 #ifdef ENABLE_DIGEST
2896 case 'D': /* Digest */
2898 return digest_authentication_encode (au, user, passwd, method, path);
2901 case 'N': /* NTLM */
2902 if (!ntlm_input (&pconn.ntlm, au))
2907 return ntlm_output (&pconn.ntlm, user, passwd, finished);
2910 /* We shouldn't get here -- this function should be only called
2911 with values approved by known_authentication_scheme_p. */
2919 if (wget_cookie_jar)
2920 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
2926 xfree_null (pconn.host);
2927 if (wget_cookie_jar)
2928 cookie_jar_delete (wget_cookie_jar);