2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation,
6 This file is part of GNU Wget.
8 GNU Wget is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 GNU Wget is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Wget. If not, see <http://www.gnu.org/licenses/>.
21 Additional permission under GNU GPL version 3 section 7
23 If you modify this program, or any covered work, by linking or
24 combining it with the OpenSSL project's OpenSSL library (or a
25 modified version of that library), containing parts covered by the
26 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
27 grants you additional permission to convey the resulting work.
28 Corresponding Source for a non-source form of such a combination
29 shall include the source code for the parts of OpenSSL used as well
30 as that of the covered work. */
55 # include "http-ntlm.h"
69 #endif /* def __VMS */
71 extern char *version_string;
75 static char *create_authorization_line (const char *, const char *,
76 const char *, const char *,
77 const char *, bool *, uerr_t *);
78 static char *basic_authentication_encode (const char *, const char *);
79 static bool known_authentication_scheme_p (const char *, const char *);
80 static void ensure_extension (struct http_stat *, const char *, int *);
81 static void load_cookies (void);
84 # define MIN(x, y) ((x) > (y) ? (y) : (x))
88 static bool cookies_loaded_p;
89 static struct cookie_jar *wget_cookie_jar;
91 #define TEXTHTML_S "text/html"
92 #define TEXTXHTML_S "application/xhtml+xml"
93 #define TEXTCSS_S "text/css"
95 /* Some status code validation macros: */
96 #define H_10X(x) (((x) >= 100) && ((x) < 200))
97 #define H_20X(x) (((x) >= 200) && ((x) < 300))
98 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
99 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
100 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
101 || (x) == HTTP_STATUS_SEE_OTHER \
102 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
104 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
105 /* Successful 2xx. */
106 #define HTTP_STATUS_OK 200
107 #define HTTP_STATUS_CREATED 201
108 #define HTTP_STATUS_ACCEPTED 202
109 #define HTTP_STATUS_NO_CONTENT 204
110 #define HTTP_STATUS_PARTIAL_CONTENTS 206
112 /* Redirection 3xx. */
113 #define HTTP_STATUS_MULTIPLE_CHOICES 300
114 #define HTTP_STATUS_MOVED_PERMANENTLY 301
115 #define HTTP_STATUS_MOVED_TEMPORARILY 302
116 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
117 #define HTTP_STATUS_NOT_MODIFIED 304
118 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
120 /* Client error 4xx. */
121 #define HTTP_STATUS_BAD_REQUEST 400
122 #define HTTP_STATUS_UNAUTHORIZED 401
123 #define HTTP_STATUS_FORBIDDEN 403
124 #define HTTP_STATUS_NOT_FOUND 404
125 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
127 /* Server errors 5xx. */
128 #define HTTP_STATUS_INTERNAL 500
129 #define HTTP_STATUS_NOT_IMPLEMENTED 501
130 #define HTTP_STATUS_BAD_GATEWAY 502
131 #define HTTP_STATUS_UNAVAILABLE 503
134 rel_none, rel_name, rel_value, rel_both
141 struct request_header {
143 enum rp release_policy;
145 int hcount, hcapacity;
150 /* Create a new, empty request. Set the request's method and its
151 arguments. METHOD should be a literal string (or it should outlive
152 the request) because it will not be freed. ARG will be freed by
155 static struct request *
156 request_new (const char *method, char *arg)
158 struct request *req = xnew0 (struct request);
160 req->headers = xnew_array (struct request_header, req->hcapacity);
161 req->method = method;
166 /* Return the method string passed with the last call to
167 request_set_method. */
170 request_method (const struct request *req)
175 /* Free one header according to the release policy specified with
176 request_set_header. */
179 release_header (struct request_header *hdr)
181 switch (hdr->release_policy)
198 /* Set the request named NAME to VALUE. Specifically, this means that
199 a "NAME: VALUE\r\n" header line will be used in the request. If a
200 header with the same name previously existed in the request, its
201 value will be replaced by this one. A NULL value means do nothing.
203 RELEASE_POLICY determines whether NAME and VALUE should be released
204 (freed) with request_free. Allowed values are:
206 - rel_none - don't free NAME or VALUE
207 - rel_name - free NAME when done
208 - rel_value - free VALUE when done
209 - rel_both - free both NAME and VALUE when done
211 Setting release policy is useful when arguments come from different
212 sources. For example:
214 // Don't free literal strings!
215 request_set_header (req, "Pragma", "no-cache", rel_none);
217 // Don't free a global variable, we'll need it later.
218 request_set_header (req, "Referer", opt.referer, rel_none);
220 // Value freshly allocated, free it when done.
221 request_set_header (req, "Range",
222 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
227 request_set_header (struct request *req, const char *name, const char *value,
228 enum rp release_policy)
230 struct request_header *hdr;
235 /* A NULL value is a no-op; if freeing the name is requested,
236 free it now to avoid leaks. */
237 if (release_policy == rel_name || release_policy == rel_both)
238 xfree ((void *)name);
242 for (i = 0; i < req->hcount; i++)
244 hdr = &req->headers[i];
245 if (0 == strcasecmp (name, hdr->name))
247 /* Replace existing header. */
248 release_header (hdr);
249 hdr->name = (void *)name;
250 hdr->value = (void *)value;
251 hdr->release_policy = release_policy;
256 /* Install new header. */
258 if (req->hcount >= req->hcapacity)
260 req->hcapacity <<= 1;
261 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
263 hdr = &req->headers[req->hcount++];
264 hdr->name = (void *)name;
265 hdr->value = (void *)value;
266 hdr->release_policy = release_policy;
269 /* Like request_set_header, but sets the whole header line, as
270 provided by the user using the `--header' option. For example,
271 request_set_user_header (req, "Foo: bar") works just like
272 request_set_header (req, "Foo", "bar"). */
275 request_set_user_header (struct request *req, const char *header)
278 const char *p = strchr (header, ':');
281 BOUNDED_TO_ALLOCA (header, p, name);
283 while (c_isspace (*p))
285 request_set_header (req, xstrdup (name), (char *) p, rel_name);
288 /* Remove the header with specified name from REQ. Returns true if
289 the header was actually removed, false otherwise. */
292 request_remove_header (struct request *req, const char *name)
295 for (i = 0; i < req->hcount; i++)
297 struct request_header *hdr = &req->headers[i];
298 if (0 == strcasecmp (name, hdr->name))
300 release_header (hdr);
301 /* Move the remaining headers by one. */
302 if (i < req->hcount - 1)
303 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
311 #define APPEND(p, str) do { \
312 int A_len = strlen (str); \
313 memcpy (p, str, A_len); \
317 /* Construct the request and write it to FD using fd_write.
318 If warc_tmp is set to a file pointer, the request string will
319 also be written to that file. */
322 request_send (const struct request *req, int fd, FILE *warc_tmp)
324 char *request_string, *p;
325 int i, size, write_error;
327 /* Count the request size. */
330 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
331 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
333 for (i = 0; i < req->hcount; i++)
335 struct request_header *hdr = &req->headers[i];
336 /* NAME ": " VALUE "\r\n" */
337 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
343 p = request_string = alloca_array (char, size);
345 /* Generate the request. */
347 APPEND (p, req->method); *p++ = ' ';
348 APPEND (p, req->arg); *p++ = ' ';
349 memcpy (p, "HTTP/1.1\r\n", 10); p += 10;
351 for (i = 0; i < req->hcount; i++)
353 struct request_header *hdr = &req->headers[i];
354 APPEND (p, hdr->name);
355 *p++ = ':', *p++ = ' ';
356 APPEND (p, hdr->value);
357 *p++ = '\r', *p++ = '\n';
360 *p++ = '\r', *p++ = '\n', *p++ = '\0';
361 assert (p - request_string == size);
365 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
367 /* Send the request to the server. */
369 write_error = fd_write (fd, request_string, size - 1, -1);
371 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
373 else if (warc_tmp != NULL)
375 /* Write a copy of the data to the WARC record. */
376 int warc_tmp_written = fwrite (request_string, 1, size - 1, warc_tmp);
377 if (warc_tmp_written != size - 1)
383 /* Release the resources used by REQ. */
386 request_free (struct request *req)
389 xfree_null (req->arg);
390 for (i = 0; i < req->hcount; i++)
391 release_header (&req->headers[i]);
392 xfree_null (req->headers);
396 static struct hash_table *basic_authed_hosts;
398 /* Find out if this host has issued a Basic challenge yet; if so, give
399 * it the username, password. A temporary measure until we can get
400 * proper authentication in place. */
403 maybe_send_basic_creds (const char *hostname, const char *user,
404 const char *passwd, struct request *req)
406 bool do_challenge = false;
408 if (opt.auth_without_challenge)
410 DEBUGP (("Auth-without-challenge set, sending Basic credentials.\n"));
413 else if (basic_authed_hosts
414 && hash_table_contains(basic_authed_hosts, hostname))
416 DEBUGP (("Found %s in basic_authed_hosts.\n", quote (hostname)));
421 DEBUGP (("Host %s has not issued a general basic challenge.\n",
426 request_set_header (req, "Authorization",
427 basic_authentication_encode (user, passwd),
434 register_basic_auth_host (const char *hostname)
436 if (!basic_authed_hosts)
438 basic_authed_hosts = make_nocase_string_hash_table (1);
440 if (!hash_table_contains(basic_authed_hosts, hostname))
442 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
443 DEBUGP (("Inserted %s into basic_authed_hosts\n", quote (hostname)));
448 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
449 PROMISED_SIZE bytes are sent over the wire -- if the file is
450 longer, read only that much; if the file is shorter, report an error.
451 If warc_tmp is set to a file pointer, the post data will
452 also be written to that file. */
455 body_file_send (int sock, const char *file_name, wgint promised_size, FILE *warc_tmp)
457 static char chunk[8192];
462 DEBUGP (("[writing BODY file %s ... ", file_name));
464 fp = fopen (file_name, "rb");
467 while (!feof (fp) && written < promised_size)
470 int length = fread (chunk, 1, sizeof (chunk), fp);
473 towrite = MIN (promised_size - written, length);
474 write_error = fd_write (sock, chunk, towrite, -1);
480 if (warc_tmp != NULL)
482 /* Write a copy of the data to the WARC record. */
483 int warc_tmp_written = fwrite (chunk, 1, towrite, warc_tmp);
484 if (warc_tmp_written != towrite)
494 /* If we've written less than was promised, report a (probably
495 nonsensical) error rather than break the promise. */
496 if (written < promised_size)
502 assert (written == promised_size);
503 DEBUGP (("done]\n"));
507 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
508 If so, return the pointer to the position after the line, otherwise
509 return NULL. This is used as callback to fd_read_hunk. The data
510 between START and PEEKED has been read and cannot be "unread"; the
511 data after PEEKED has only been peeked. */
514 response_head_terminator (const char *start, const char *peeked, int peeklen)
518 /* If at first peek, verify whether HUNK starts with "HTTP". If
519 not, this is a HTTP/0.9 request and we must bail out without
521 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
524 /* Look for "\n[\r]\n", and return the following position if found.
525 Start two chars before the current to cover the possibility that
526 part of the terminator (e.g. "\n\r") arrived in the previous
528 p = peeked - start < 2 ? start : peeked - 2;
529 end = peeked + peeklen;
531 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
532 for (; p < end - 2; p++)
535 if (p[1] == '\r' && p[2] == '\n')
537 else if (p[1] == '\n')
540 /* p==end-2: check for \n\n directly preceding END. */
541 if (p[0] == '\n' && p[1] == '\n')
547 /* The maximum size of a single HTTP response we care to read. Rather
548 than being a limit of the reader implementation, this limit
549 prevents Wget from slurping all available memory upon encountering
550 malicious or buggy server output, thus protecting the user. Define
551 it to 0 to remove the limit. */
553 #define HTTP_RESPONSE_MAX_SIZE 65536
555 /* Read the HTTP request head from FD and return it. The error
556 conditions are the same as with fd_read_hunk.
558 To support HTTP/0.9 responses, this function tries to make sure
559 that the data begins with "HTTP". If this is not the case, no data
560 is read and an empty request is returned, so that the remaining
561 data can be treated as body. */
564 read_http_response_head (int fd)
566 return fd_read_hunk (fd, response_head_terminator, 512,
567 HTTP_RESPONSE_MAX_SIZE);
571 /* The response data. */
574 /* The array of pointers that indicate where each header starts.
575 For example, given this HTTP response:
582 The headers are located like this:
584 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
586 headers[0] headers[1] headers[2] headers[3]
588 I.e. headers[0] points to the beginning of the request,
589 headers[1] points to the end of the first header and the
590 beginning of the second one, etc. */
592 const char **headers;
595 /* Create a new response object from the text of the HTTP response,
596 available in HEAD. That text is automatically split into
597 constituent header lines for fast retrieval using
600 static struct response *
601 resp_new (const char *head)
606 struct response *resp = xnew0 (struct response);
611 /* Empty head means that we're dealing with a headerless
612 (HTTP/0.9) response. In that case, don't set HEADERS at
617 /* Split HEAD into header lines, so that resp_header_* functions
618 don't need to do this over and over again. */
624 DO_REALLOC (resp->headers, size, count + 1, const char *);
625 resp->headers[count++] = hdr;
627 /* Break upon encountering an empty line. */
628 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
631 /* Find the end of HDR, including continuations. */
634 const char *end = strchr (hdr, '\n');
640 while (*hdr == ' ' || *hdr == '\t');
642 DO_REALLOC (resp->headers, size, count + 1, const char *);
643 resp->headers[count] = NULL;
648 /* Locate the header named NAME in the request data, starting with
649 position START. This allows the code to loop through the request
650 data, filtering for all requests of a given name. Returns the
651 found position, or -1 for failure. The code that uses this
652 function typically looks like this:
654 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
655 ... do something with header ...
657 If you only care about one header, use resp_header_get instead of
661 resp_header_locate (const struct response *resp, const char *name, int start,
662 const char **begptr, const char **endptr)
665 const char **headers = resp->headers;
668 if (!headers || !headers[1])
671 name_len = strlen (name);
677 for (; headers[i + 1]; i++)
679 const char *b = headers[i];
680 const char *e = headers[i + 1];
682 && b[name_len] == ':'
683 && 0 == strncasecmp (b, name, name_len))
686 while (b < e && c_isspace (*b))
688 while (b < e && c_isspace (e[-1]))
698 /* Find and retrieve the header named NAME in the request data. If
699 found, set *BEGPTR to its starting, and *ENDPTR to its ending
700 position, and return true. Otherwise return false.
702 This function is used as a building block for resp_header_copy
703 and resp_header_strdup. */
706 resp_header_get (const struct response *resp, const char *name,
707 const char **begptr, const char **endptr)
709 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
713 /* Copy the response header named NAME to buffer BUF, no longer than
714 BUFSIZE (BUFSIZE includes the terminating 0). If the header
715 exists, true is returned, false otherwise. If there should be no
716 limit on the size of the header, use resp_header_strdup instead.
718 If BUFSIZE is 0, no data is copied, but the boolean indication of
719 whether the header is present is still returned. */
722 resp_header_copy (const struct response *resp, const char *name,
723 char *buf, int bufsize)
726 if (!resp_header_get (resp, name, &b, &e))
730 int len = MIN (e - b, bufsize - 1);
731 memcpy (buf, b, len);
737 /* Return the value of header named NAME in RESP, allocated with
738 malloc. If such a header does not exist in RESP, return NULL. */
741 resp_header_strdup (const struct response *resp, const char *name)
744 if (!resp_header_get (resp, name, &b, &e))
746 return strdupdelim (b, e);
749 /* Parse the HTTP status line, which is of format:
751 HTTP-Version SP Status-Code SP Reason-Phrase
753 The function returns the status-code, or -1 if the status line
754 appears malformed. The pointer to "reason-phrase" message is
755 returned in *MESSAGE. */
758 resp_status (const struct response *resp, char **message)
765 /* For a HTTP/0.9 response, assume status 200. */
767 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
771 p = resp->headers[0];
772 end = resp->headers[1];
778 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
782 /* Match the HTTP version. This is optional because Gnutella
783 servers have been reported to not specify HTTP version. */
784 if (p < end && *p == '/')
787 while (p < end && c_isdigit (*p))
789 if (p < end && *p == '.')
791 while (p < end && c_isdigit (*p))
795 while (p < end && c_isspace (*p))
797 if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
800 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
805 while (p < end && c_isspace (*p))
807 while (p < end && c_isspace (end[-1]))
809 *message = strdupdelim (p, end);
815 /* Release the resources used by RESP. */
818 resp_free (struct response *resp)
820 xfree_null (resp->headers);
824 /* Print a single line of response, the characters [b, e). We tried
826 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
827 but that failed to escape the non-printable characters and, in fact,
828 caused crashes in UTF-8 locales. */
831 print_response_line(const char *prefix, const char *b, const char *e)
834 BOUNDED_TO_ALLOCA(b, e, copy);
835 logprintf (LOG_ALWAYS, "%s%s\n", prefix,
836 quotearg_style (escape_quoting_style, copy));
839 /* Print the server response, line by line, omitting the trailing CRLF
840 from individual header lines, and prefixed with PREFIX. */
843 print_server_response (const struct response *resp, const char *prefix)
848 for (i = 0; resp->headers[i + 1]; i++)
850 const char *b = resp->headers[i];
851 const char *e = resp->headers[i + 1];
853 if (b < e && e[-1] == '\n')
855 if (b < e && e[-1] == '\r')
857 print_response_line(prefix, b, e);
861 /* Parse the `Content-Range' header and extract the information it
862 contains. Returns true if successful, false otherwise. */
864 parse_content_range (const char *hdr, wgint *first_byte_ptr,
865 wgint *last_byte_ptr, wgint *entity_length_ptr)
869 /* Ancient versions of Netscape proxy server, presumably predating
870 rfc2068, sent out `Content-Range' without the "bytes"
872 if (0 == strncasecmp (hdr, "bytes", 5))
875 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
879 while (c_isspace (*hdr))
884 if (!c_isdigit (*hdr))
886 for (num = 0; c_isdigit (*hdr); hdr++)
887 num = 10 * num + (*hdr - '0');
888 if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
890 *first_byte_ptr = num;
892 for (num = 0; c_isdigit (*hdr); hdr++)
893 num = 10 * num + (*hdr - '0');
894 if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
896 *last_byte_ptr = num;
901 for (num = 0; c_isdigit (*hdr); hdr++)
902 num = 10 * num + (*hdr - '0');
903 *entity_length_ptr = num;
907 /* Read the body of the request, but don't store it anywhere and don't
908 display a progress gauge. This is useful for reading the bodies of
909 administrative responses to which we will soon issue another
910 request. The response is not useful to the user, but reading it
911 allows us to continue using the same connection to the server.
913 If reading fails, false is returned, true otherwise. In debug
914 mode, the body is displayed for debugging purposes. */
917 skip_short_body (int fd, wgint contlen, bool chunked)
920 SKIP_SIZE = 512, /* size of the download buffer */
921 SKIP_THRESHOLD = 4096 /* the largest size we read */
923 wgint remaining_chunk_size = 0;
924 char dlbuf[SKIP_SIZE + 1];
925 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
927 /* If the body is too large, it makes more sense to simply close the
928 connection than to try to read the body. */
929 if (contlen > SKIP_THRESHOLD)
932 while (contlen > 0 || chunked)
937 if (remaining_chunk_size == 0)
939 char *line = fd_read_line (fd);
944 remaining_chunk_size = strtol (line, &endl, 16);
947 if (remaining_chunk_size == 0)
949 line = fd_read_line (fd);
955 contlen = MIN (remaining_chunk_size, SKIP_SIZE);
958 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
960 ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
963 /* Don't normally report the error since this is an
964 optimization that should be invisible to the user. */
965 DEBUGP (("] aborting (%s).\n",
966 ret < 0 ? fd_errstr (fd) : "EOF received"));
973 remaining_chunk_size -= ret;
974 if (remaining_chunk_size == 0)
976 char *line = fd_read_line (fd);
984 /* Safe even if %.*s bogusly expects terminating \0 because
985 we've zero-terminated dlbuf above. */
986 DEBUGP (("%.*s", ret, dlbuf));
989 DEBUGP (("] done.\n"));
993 #define NOT_RFC2231 0
994 #define RFC2231_NOENCODING 1
995 #define RFC2231_ENCODING 2
997 /* extract_param extracts the parameter name into NAME.
998 However, if the parameter name is in RFC2231 format then
999 this function adjusts NAME by stripping of the trailing
1000 characters that are not part of the name but are present to
1001 indicate the presence of encoding information in the value
1002 or a fragment of a long parameter value
1005 modify_param_name(param_token *name)
1007 const char *delim1 = memchr (name->b, '*', name->e - name->b);
1008 const char *delim2 = memrchr (name->b, '*', name->e - name->b);
1014 result = NOT_RFC2231;
1016 else if(delim1 == delim2)
1018 if ((name->e - 1) == delim1)
1020 result = RFC2231_ENCODING;
1024 result = RFC2231_NOENCODING;
1031 result = RFC2231_ENCODING;
1036 /* extract_param extract the paramater value into VALUE.
1037 Like modify_param_name this function modifies VALUE by
1038 stripping off the encoding information from the actual value
1041 modify_param_value (param_token *value, int encoding_type )
1043 if (RFC2231_ENCODING == encoding_type)
1045 const char *delim = memrchr (value->b, '\'', value->e - value->b);
1046 if ( delim != NULL )
1048 value->b = (delim+1);
1053 /* Extract a parameter from the string (typically an HTTP header) at
1054 **SOURCE and advance SOURCE to the next parameter. Return false
1055 when there are no more parameters to extract. The name of the
1056 parameter is returned in NAME, and the value in VALUE. If the
1057 parameter has no value, the token's value is zeroed out.
1059 For example, if *SOURCE points to the string "attachment;
1060 filename=\"foo bar\"", the first call to this function will return
1061 the token named "attachment" and no value, and the second call will
1062 return the token named "filename" and value "foo bar". The third
1063 call will return false, indicating no more valid tokens.
1065 is_url_encoded is an out parameter. If not NULL, a boolean value will be
1066 stored into it, letting the caller know whether or not the extracted value is
1067 URL-encoded. The caller can then decode it with url_unescape(), which however
1068 performs decoding in-place. URL-encoding is used by RFC 2231 to support
1069 non-US-ASCII characters in HTTP header values. */
1072 extract_param (const char **source, param_token *name, param_token *value,
1073 char separator, bool *is_url_encoded)
1075 const char *p = *source;
1077 *is_url_encoded = false; /* initializing the out parameter */
1079 while (c_isspace (*p)) ++p;
1083 return false; /* no error; nothing more to extract */
1088 while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
1090 if (name->b == name->e)
1091 return false; /* empty name: error */
1092 while (c_isspace (*p)) ++p;
1093 if (*p == separator || !*p) /* no value */
1096 if (*p == separator) ++p;
1101 return false; /* error */
1103 /* *p is '=', extract value */
1105 while (c_isspace (*p)) ++p;
1106 if (*p == '"') /* quoted */
1109 while (*p && *p != '"') ++p;
1113 /* Currently at closing quote; find the end of param. */
1114 while (c_isspace (*p)) ++p;
1115 while (*p && *p != separator) ++p;
1116 if (*p == separator)
1119 /* garbage after closed quote, e.g. foo="bar"baz */
1125 while (*p && *p != separator) ++p;
1127 while (value->e != value->b && c_isspace (value->e[-1]))
1129 if (*p == separator) ++p;
1133 int param_type = modify_param_name(name);
1134 if (NOT_RFC2231 != param_type)
1136 if (RFC2231_ENCODING == param_type && is_url_encoded)
1137 *is_url_encoded = true;
1138 modify_param_value(value, param_type);
1144 #undef RFC2231_NOENCODING
1145 #undef RFC2231_ENCODING
1147 /* Appends the string represented by VALUE to FILENAME */
1150 append_value_to_filename (char **filename, param_token const * const value,
1151 bool is_url_encoded)
1153 int original_length = strlen(*filename);
1154 int new_length = strlen(*filename) + (value->e - value->b);
1155 *filename = xrealloc (*filename, new_length+1);
1156 memcpy (*filename + original_length, value->b, (value->e - value->b));
1157 (*filename)[new_length] = '\0';
1159 url_unescape (*filename + original_length);
1163 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1165 /* Parse the contents of the `Content-Disposition' header, extracting
1166 the information useful to Wget. Content-Disposition is a header
1167 borrowed from MIME; when used in HTTP, it typically serves for
1168 specifying the desired file name of the resource. For example:
1170 Content-Disposition: attachment; filename="flora.jpg"
1172 Wget will skip the tokens it doesn't care about, such as
1173 "attachment" in the previous example; it will also skip other
1174 unrecognized params. If the header is syntactically correct and
1175 contains a file name, a copy of the file name is stored in
1176 *filename and true is returned. Otherwise, the function returns
1179 The file name is stripped of directory components and must not be
1182 Historically, this function returned filename prefixed with opt.dir_prefix,
1183 now that logic is handled by the caller, new code should pay attention,
1184 changed by crq, Sep 2010.
1188 parse_content_disposition (const char *hdr, char **filename)
1190 param_token name, value;
1192 bool is_url_encoded = false;
1193 for ( ; extract_param (&hdr, &name, &value, ';', &is_url_encoded);
1194 is_url_encoded = false)
1196 int isFilename = BOUNDED_EQUAL_NO_CASE ( name.b, name.e, "filename" );
1197 if ( isFilename && value.b != NULL)
1199 /* Make the file name begin at the last slash or backslash. */
1200 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1201 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1202 if (last_slash && last_bs)
1203 value.b = 1 + MAX (last_slash, last_bs);
1204 else if (last_slash || last_bs)
1205 value.b = 1 + (last_slash ? last_slash : last_bs);
1206 if (value.b == value.e)
1210 append_value_to_filename (filename, &value, is_url_encoded);
1213 *filename = strdupdelim (value.b, value.e);
1215 url_unescape (*filename);
1227 /* Persistent connections. Currently, we cache the most recently used
1228 connection as persistent, provided that the HTTP server agrees to
1229 make it such. The persistence data is stored in the variables
1230 below. Ideally, it should be possible to cache an arbitrary fixed
1231 number of these connections. */
1233 /* Whether a persistent connection is active. */
1234 static bool pconn_active;
1237 /* The socket of the connection. */
1240 /* Host and port of the currently active persistent connection. */
1244 /* Whether a ssl handshake has occoured on this connection. */
1247 /* Whether the connection was authorized. This is only done by
1248 NTLM, which authorizes *connections* rather than individual
1249 requests. (That practice is peculiar for HTTP, but it is a
1250 useful optimization.) */
1254 /* NTLM data of the current connection. */
1255 struct ntlmdata ntlm;
1259 /* Mark the persistent connection as invalid and free the resources it
1260 uses. This is used by the CLOSE_* macros after they forcefully
1261 close a registered persistent connection. */
1264 invalidate_persistent (void)
1266 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1267 pconn_active = false;
1268 fd_close (pconn.socket);
1273 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1274 persistent. This will enable someone to use the same connection
1275 later. In the context of HTTP, this must be called only AFTER the
1276 response has been received and the server has promised that the
1277 connection will remain alive.
1279 If a previous connection was persistent, it is closed. */
1282 register_persistent (const char *host, int port, int fd, bool ssl)
1286 if (pconn.socket == fd)
1288 /* The connection FD is already registered. */
1293 /* The old persistent connection is still active; close it
1294 first. This situation arises whenever a persistent
1295 connection exists, but we then connect to a different
1296 host, and try to register a persistent connection to that
1298 invalidate_persistent ();
1302 pconn_active = true;
1304 pconn.host = xstrdup (host);
1307 pconn.authorized = false;
1309 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1312 /* Return true if a persistent connection is available for connecting
1316 persistent_available_p (const char *host, int port, bool ssl,
1317 bool *host_lookup_failed)
1319 /* First, check whether a persistent connection is active at all. */
1323 /* If we want SSL and the last connection wasn't or vice versa,
1324 don't use it. Checking for host and port is not enough because
1325 HTTP and HTTPS can apparently coexist on the same port. */
1326 if (ssl != pconn.ssl)
1329 /* If we're not connecting to the same port, we're not interested. */
1330 if (port != pconn.port)
1333 /* If the host is the same, we're in business. If not, there is
1334 still hope -- read below. */
1335 if (0 != strcasecmp (host, pconn.host))
1337 /* Check if pconn.socket is talking to HOST under another name.
1338 This happens often when both sites are virtual hosts
1339 distinguished only by name and served by the same network
1340 interface, and hence the same web server (possibly set up by
1341 the ISP and serving many different web sites). This
1342 admittedly unconventional optimization does not contradict
1343 HTTP and works well with popular server software. */
1347 struct address_list *al;
1350 /* Don't try to talk to two different SSL sites over the same
1351 secure connection! (Besides, it's not clear that
1352 name-based virtual hosting is even possible with SSL.) */
1355 /* If pconn.socket's peer is one of the IP addresses HOST
1356 resolves to, pconn.socket is for all intents and purposes
1357 already talking to HOST. */
1359 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1361 /* Can't get the peer's address -- something must be very
1362 wrong with the connection. */
1363 invalidate_persistent ();
1366 al = lookup_host (host, 0);
1369 *host_lookup_failed = true;
1373 found = address_list_contains (al, &ip);
1374 address_list_release (al);
1379 /* The persistent connection's peer address was found among the
1380 addresses HOST resolved to; therefore, pconn.sock is in fact
1381 already talking to HOST -- no need to reconnect. */
1384 /* Finally, check whether the connection is still open. This is
1385 important because most servers implement liberal (short) timeout
1386 on persistent connections. Wget can of course always reconnect
1387 if the connection doesn't work out, but it's nicer to know in
1388 advance. This test is a logical followup of the first test, but
1389 is "expensive" and therefore placed at the end of the list.
1391 (Current implementation of test_socket_open has a nice side
1392 effect that it treats sockets with pending data as "closed".
1393 This is exactly what we want: if a broken server sends message
1394 body in response to HEAD, or if it sends more than conent-length
1395 data, we won't reuse the corrupted connection.) */
1397 if (!test_socket_open (pconn.socket))
1399 /* Oops, the socket is no longer open. Now that we know that,
1400 let's invalidate the persistent connection before returning
1402 invalidate_persistent ();
1409 /* The idea behind these two CLOSE macros is to distinguish between
1410 two cases: one when the job we've been doing is finished, and we
1411 want to close the connection and leave, and two when something is
1412 seriously wrong and we're closing the connection as part of
1415 In case of keep_alive, CLOSE_FINISH should leave the connection
1416 open, while CLOSE_INVALIDATE should still close it.
1418 Note that the semantics of the flag `keep_alive' is "this
1419 connection *will* be reused (the server has promised not to close
1420 the connection once we're done)", while the semantics of
1421 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1422 active, registered connection". */
1424 #define CLOSE_FINISH(fd) do { \
1427 if (pconn_active && (fd) == pconn.socket) \
1428 invalidate_persistent (); \
1437 #define CLOSE_INVALIDATE(fd) do { \
1438 if (pconn_active && (fd) == pconn.socket) \
1439 invalidate_persistent (); \
1447 wgint len; /* received length */
1448 wgint contlen; /* expected length */
1449 wgint restval; /* the restart value */
1450 int res; /* the result of last read */
1451 char *rderrmsg; /* error message from read error */
1452 char *newloc; /* new location (redirection) */
1453 char *remote_time; /* remote time-stamp string */
1454 char *error; /* textual HTTP error */
1455 int statcode; /* status code */
1456 char *message; /* status message */
1457 wgint rd_size; /* amount of data read from socket */
1458 double dltime; /* time it took to download the data */
1459 const char *referer; /* value of the referer header. */
1460 char *local_file; /* local file name. */
1461 bool existence_checked; /* true if we already checked for a file's
1462 existence after having begun to download
1463 (needed in gethttp for when connection is
1464 interrupted/restarted. */
1465 bool timestamp_checked; /* true if pre-download time-stamping checks
1466 * have already been performed */
1467 char *orig_file_name; /* name of file to compare for time-stamping
1468 * (might be != local_file if -K is set) */
1469 wgint orig_file_size; /* size of file to compare for time-stamping */
1470 time_t orig_file_tstamp; /* time-stamp of file to compare for
1475 free_hstat (struct http_stat *hs)
1477 xfree_null (hs->newloc);
1478 xfree_null (hs->remote_time);
1479 xfree_null (hs->error);
1480 xfree_null (hs->rderrmsg);
1481 xfree_null (hs->local_file);
1482 xfree_null (hs->orig_file_name);
1483 xfree_null (hs->message);
1485 /* Guard against being called twice. */
1487 hs->remote_time = NULL;
1492 get_file_flags (const char *filename, int *dt)
1494 logprintf (LOG_VERBOSE, _("\
1495 File %s already there; not retrieving.\n\n"), quote (filename));
1496 /* If the file is there, we suppose it's retrieved OK. */
1499 /* #### Bogusness alert. */
1500 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1501 if (has_html_suffix_p (filename))
1505 /* Download the response body from the socket and writes it to
1506 an output file. The headers have already been read from the
1507 socket. If WARC is enabled, the response body will also be
1508 written to a WARC response record.
1510 hs, contlen, contrange, chunked_transfer_encoding and url are
1511 parameters from the gethttp method. fp is a pointer to the
1514 url, warc_timestamp_str, warc_request_uuid, warc_ip, type
1515 and statcode will be saved in the headers of the WARC record.
1516 The head parameter contains the HTTP headers of the response.
1518 If fp is NULL and WARC is enabled, the response body will be
1519 written only to the WARC file. If WARC is disabled and fp
1520 is a file pointer, the data will be written to the file.
1521 If fp is a file pointer and WARC is enabled, the body will
1522 be written to both destinations.
1524 Returns the error code. */
1526 read_response_body (struct http_stat *hs, int sock, FILE *fp, wgint contlen,
1527 wgint contrange, bool chunked_transfer_encoding,
1528 char *url, char *warc_timestamp_str, char *warc_request_uuid,
1529 ip_address *warc_ip, char *type, int statcode, char *head)
1531 int warc_payload_offset = 0;
1532 FILE *warc_tmp = NULL;
1535 if (opt.warc_filename != NULL)
1537 /* Open a temporary file where we can write the response before we
1538 add it to the WARC record. */
1539 warc_tmp = warc_tempfile ();
1540 if (warc_tmp == NULL)
1541 warcerr = WARC_TMP_FOPENERR;
1545 /* We should keep the response headers for the WARC record. */
1546 int head_len = strlen (head);
1547 int warc_tmp_written = fwrite (head, 1, head_len, warc_tmp);
1548 if (warc_tmp_written != head_len)
1549 warcerr = WARC_TMP_FWRITEERR;
1550 warc_payload_offset = head_len;
1555 if (warc_tmp != NULL)
1563 /* This confuses the timestamping code that checks for file size.
1564 #### The timestamping code should be smarter about file size. */
1565 if (opt.save_headers && hs->restval == 0)
1566 fwrite (head, 1, strlen (head), fp);
1569 /* Read the response body. */
1572 /* If content-length is present, read that much; otherwise, read
1573 until EOF. The HTTP spec doesn't require the server to
1574 actually close the connection when it's done sending data. */
1575 flags |= rb_read_exactly;
1576 if (fp != NULL && hs->restval > 0 && contrange == 0)
1577 /* If the server ignored our range request, instruct fd_read_body
1578 to skip the first RESTVAL bytes of body. */
1579 flags |= rb_skip_startpos;
1580 if (chunked_transfer_encoding)
1581 flags |= rb_chunked_transfer_encoding;
1583 hs->len = hs->restval;
1585 /* Download the response body and write it to fp.
1586 If we are working on a WARC file, we simultaneously write the
1587 response body to warc_tmp. */
1588 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
1589 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
1593 if (warc_tmp != NULL)
1595 /* Create a response record and write it to the WARC file.
1596 Note: per the WARC standard, the request and response should share
1597 the same date header. We re-use the timestamp of the request.
1598 The response record should also refer to the uuid of the request. */
1599 bool r = warc_write_response_record (url, warc_timestamp_str,
1600 warc_request_uuid, warc_ip,
1601 warc_tmp, warc_payload_offset,
1602 type, statcode, hs->newloc);
1604 /* warc_write_response_record has closed warc_tmp. */
1610 return RETRFINISHED;
1613 if (warc_tmp != NULL)
1618 /* Error while writing to fd. */
1621 else if (hs->res == -3)
1623 /* Error while writing to warc_tmp. */
1624 return WARC_TMP_FWRITEERR;
1629 hs->rderrmsg = xstrdup (fd_errstr (sock));
1630 return RETRFINISHED;
1634 #define BEGINS_WITH(line, string_constant) \
1635 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1636 && (c_isspace (line[sizeof (string_constant) - 1]) \
1637 || !line[sizeof (string_constant) - 1]))
1640 #define SET_USER_AGENT(req) do { \
1641 if (!opt.useragent) \
1642 request_set_header (req, "User-Agent", \
1643 aprintf ("Wget/%s (VMS %s %s)", \
1644 version_string, vms_arch(), vms_vers()), \
1646 else if (*opt.useragent) \
1647 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1649 #else /* def __VMS */
1650 #define SET_USER_AGENT(req) do { \
1651 if (!opt.useragent) \
1652 request_set_header (req, "User-Agent", \
1653 aprintf ("Wget/%s (%s)", \
1654 version_string, OS_TYPE), \
1656 else if (*opt.useragent) \
1657 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1659 #endif /* def __VMS [else] */
1661 /* Retrieve a document through HTTP protocol. It recognizes status
1662 code, and correctly handles redirections. It closes the network
1663 socket. If it receives an error from the functions below it, it
1664 will print it if there is enough information to do so (almost
1665 always), returning the error to the caller (i.e. http_loop).
1667 Various HTTP parameters are stored to hs.
1669 If PROXY is non-NULL, the connection will be made to the proxy
1670 server, and u->url will be requested. */
1672 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
1673 struct iri *iri, int count)
1675 struct request *req;
1678 char *user, *passwd;
1682 wgint contlen, contrange;
1689 /* Set to 1 when the authorization has already been sent and should
1690 not be tried again. */
1691 bool auth_finished = false;
1693 /* Set to 1 when just globally-set Basic authorization has been sent;
1694 * should prevent further Basic negotiations, but not other
1696 bool basic_auth_finished = false;
1698 /* Whether NTLM authentication is used for this request. */
1699 bool ntlm_seen = false;
1701 /* Whether our connection to the remote host is through SSL. */
1702 bool using_ssl = false;
1704 /* Whether a HEAD request will be issued (as opposed to GET or
1706 bool head_only = !!(*dt & HEAD_ONLY);
1709 struct response *resp;
1713 /* Declare WARC variables. */
1714 bool warc_enabled = (opt.warc_filename != NULL);
1715 FILE *warc_tmp = NULL;
1716 char warc_timestamp_str [21];
1717 char warc_request_uuid [48];
1718 ip_address *warc_ip = NULL;
1719 off_t warc_payload_offset = -1;
1721 /* Whether this connection will be kept alive after the HTTP request
1725 /* Is the server using the chunked transfer encoding? */
1726 bool chunked_transfer_encoding = false;
1728 /* Whether keep-alive should be inhibited. */
1729 bool inhibit_keep_alive =
1730 !opt.http_keep_alive || opt.ignore_length;
1732 /* Headers sent when using POST. */
1733 wgint body_data_size = 0;
1735 bool host_lookup_failed = false;
1738 if (u->scheme == SCHEME_HTTPS)
1740 /* Initialize the SSL context. After this has once been done,
1741 it becomes a no-op. */
1744 scheme_disable (SCHEME_HTTPS);
1745 logprintf (LOG_NOTQUIET,
1746 _("Disabling SSL due to encountered errors.\n"));
1747 return SSLINITFAILED;
1750 #endif /* HAVE_SSL */
1752 /* Initialize certain elements of struct http_stat. */
1756 hs->rderrmsg = NULL;
1758 hs->remote_time = NULL;
1764 /* Prepare the request to send. */
1767 const char *meth = "GET";
1770 else if (opt.method)
1772 /* Use the full path, i.e. one that includes the leading slash and
1773 the query string. E.g. if u->path is "foo/bar" and u->query is
1774 "param=value", full_path will be "/foo/bar?param=value". */
1777 /* When using SSL over proxy, CONNECT establishes a direct
1778 connection to the HTTPS server. Therefore use the same
1779 argument as when talking to the server directly. */
1780 && u->scheme != SCHEME_HTTPS
1783 meth_arg = xstrdup (u->url);
1785 meth_arg = url_full_path (u);
1786 req = request_new (meth, meth_arg);
1789 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1790 if (*dt & SEND_NOCACHE)
1792 /* Cache-Control MUST be obeyed by all HTTP/1.1 caching mechanisms... */
1793 request_set_header (req, "Cache-Control", "no-cache, must-revalidate", rel_none);
1795 /* ... but some HTTP/1.0 caches doesn't implement Cache-Control. */
1796 request_set_header (req, "Pragma", "no-cache", rel_none);
1799 request_set_header (req, "Range",
1800 aprintf ("bytes=%s-",
1801 number_to_static_string (hs->restval)),
1803 SET_USER_AGENT (req);
1804 request_set_header (req, "Accept", "*/*", rel_none);
1806 /* Find the username and password for authentication. */
1809 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1810 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1811 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1813 /* We only do "site-wide" authentication with "global" user/password
1814 * values unless --auth-no-challange has been requested; URL user/password
1815 * info overrides. */
1816 if (user && passwd && (!u->user || opt.auth_without_challenge))
1818 /* If this is a host for which we've already received a Basic
1819 * challenge, we'll go ahead and send Basic authentication creds. */
1820 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1823 /* Generate the Host header, HOST:PORT. Take into account that:
1825 - Broken server-side software often doesn't recognize the PORT
1826 argument, so we must generate "Host: www.server.com" instead of
1827 "Host: www.server.com:80" (and likewise for https port).
1829 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1830 becomes ambiguous and needs to be rewritten as "Host:
1831 [3ffe:8100:200:2::2]:1234". */
1833 /* Formats arranged for hfmt[add_port][add_squares]. */
1834 static const char *hfmt[][2] = {
1835 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1837 int add_port = u->port != scheme_default_port (u->scheme);
1838 int add_squares = strchr (u->host, ':') != NULL;
1839 request_set_header (req, "Host",
1840 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1844 if (inhibit_keep_alive)
1845 request_set_header (req, "Connection", "Close", rel_none);
1849 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1852 request_set_header (req, "Connection", "Close", rel_none);
1853 request_set_header (req, "Proxy-Connection", "Keep-Alive", rel_none);
1860 if (opt.body_data || opt.body_file)
1862 request_set_header (req, "Content-Type",
1863 "application/x-www-form-urlencoded", rel_none);
1866 body_data_size = strlen (opt.body_data);
1869 body_data_size = file_size (opt.body_file);
1870 if (body_data_size == -1)
1872 logprintf (LOG_NOTQUIET, _("BODY data file %s missing: %s\n"),
1873 quote (opt.body_file), strerror (errno));
1877 request_set_header (req, "Content-Length",
1878 xstrdup (number_to_static_string (body_data_size)),
1884 /* We need to come back here when the initial attempt to retrieve
1885 without authorization header fails. (Expected to happen at least
1886 for the Digest authorization scheme.) */
1889 request_set_header (req, "Cookie",
1890 cookie_header (wget_cookie_jar,
1891 u->host, u->port, u->path,
1893 u->scheme == SCHEME_HTTPS
1900 /* Add the user headers. */
1901 if (opt.user_headers)
1904 for (i = 0; opt.user_headers[i]; i++)
1905 request_set_user_header (req, opt.user_headers[i]);
1911 char *proxy_user, *proxy_passwd;
1912 /* For normal username and password, URL components override
1913 command-line/wgetrc parameters. With proxy
1914 authentication, it's the reverse, because proxy URLs are
1915 normally the "permanent" ones, so command-line args
1916 should take precedence. */
1917 if (opt.proxy_user && opt.proxy_passwd)
1919 proxy_user = opt.proxy_user;
1920 proxy_passwd = opt.proxy_passwd;
1924 proxy_user = proxy->user;
1925 proxy_passwd = proxy->passwd;
1927 /* #### This does not appear right. Can't the proxy request,
1928 say, `Digest' authentication? */
1929 if (proxy_user && proxy_passwd)
1930 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1932 /* If we're using a proxy, we will be connecting to the proxy
1936 /* Proxy authorization over SSL is handled below. */
1938 if (u->scheme != SCHEME_HTTPS)
1940 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1945 /* Establish the connection. */
1947 if (inhibit_keep_alive)
1951 /* Look for a persistent connection to target host, unless a
1952 proxy is used. The exception is when SSL is in use, in which
1953 case the proxy is nothing but a passthrough to the target
1954 host, registered as a connection to the latter. */
1955 struct url *relevant = conn;
1957 if (u->scheme == SCHEME_HTTPS)
1961 if (persistent_available_p (relevant->host, relevant->port,
1963 relevant->scheme == SCHEME_HTTPS,
1967 &host_lookup_failed))
1969 int family = socket_family (pconn.socket, ENDPOINT_PEER);
1970 sock = pconn.socket;
1971 using_ssl = pconn.ssl;
1973 if (family == AF_INET6)
1974 logprintf (LOG_VERBOSE, _("Reusing existing connection to [%s]:%d.\n"),
1975 quotearg_style (escape_quoting_style, pconn.host),
1979 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1980 quotearg_style (escape_quoting_style, pconn.host),
1982 DEBUGP (("Reusing fd %d.\n", sock));
1983 if (pconn.authorized)
1984 /* If the connection is already authorized, the "Basic"
1985 authorization added by code above is unnecessary and
1987 request_remove_header (req, "Authorization");
1989 else if (host_lookup_failed)
1992 logprintf(LOG_NOTQUIET,
1993 _("%s: unable to resolve host address %s\n"),
1994 exec_name, quote (relevant->host));
1997 else if (sock != -1)
2005 sock = connect_to_host (conn->host, conn->port);
2014 return (retryable_socket_connect_error (errno)
2015 ? CONERROR : CONIMPOSSIBLE);
2019 if (proxy && u->scheme == SCHEME_HTTPS)
2021 /* When requesting SSL URLs through proxies, use the
2022 CONNECT method to request passthrough. */
2023 struct request *connreq = request_new ("CONNECT",
2024 aprintf ("%s:%d", u->host, u->port));
2025 SET_USER_AGENT (connreq);
2028 request_set_header (connreq, "Proxy-Authorization",
2029 proxyauth, rel_value);
2030 /* Now that PROXYAUTH is part of the CONNECT request,
2031 zero it out so we don't send proxy authorization with
2032 the regular request below. */
2035 request_set_header (connreq, "Host",
2036 aprintf ("%s:%d", u->host, u->port),
2039 write_error = request_send (connreq, sock, 0);
2040 request_free (connreq);
2041 if (write_error < 0)
2043 CLOSE_INVALIDATE (sock);
2048 head = read_http_response_head (sock);
2051 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
2053 CLOSE_INVALIDATE (sock);
2063 DEBUGP (("proxy responded with: [%s]\n", head));
2065 resp = resp_new (head);
2066 statcode = resp_status (resp, &message);
2069 char *tms = datetime_str (time (NULL));
2070 logprintf (LOG_VERBOSE, "%d\n", statcode);
2071 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
2072 quotearg_style (escape_quoting_style,
2073 _("Malformed status line")));
2078 hs->message = xstrdup (message);
2081 if (statcode != 200)
2084 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
2085 message ? quotearg_style (escape_quoting_style, message) : "?");
2086 xfree_null (message);
2090 xfree_null (message);
2092 /* SOCK is now *really* connected to u->host, so update CONN
2093 to reflect this. That way register_persistent will
2094 register SOCK as being connected to u->host:u->port. */
2098 if (conn->scheme == SCHEME_HTTPS)
2100 if (!ssl_connect_wget (sock, u->host))
2106 else if (!ssl_check_certificate (sock, u->host))
2110 return VERIFCERTERR;
2114 #endif /* HAVE_SSL */
2117 /* Open the temporary file where we will write the request. */
2120 warc_tmp = warc_tempfile ();
2121 if (warc_tmp == NULL)
2123 CLOSE_INVALIDATE (sock);
2125 return WARC_TMP_FOPENERR;
2130 warc_ip = (ip_address *) alloca (sizeof (ip_address));
2131 socket_ip_address (sock, warc_ip, ENDPOINT_PEER);
2135 /* Send the request to server. */
2136 write_error = request_send (req, sock, warc_tmp);
2138 if (write_error >= 0)
2142 DEBUGP (("[BODY data: %s]\n", opt.body_data));
2143 write_error = fd_write (sock, opt.body_data, body_data_size, -1);
2144 if (write_error >= 0 && warc_tmp != NULL)
2146 /* Remember end of headers / start of payload. */
2147 warc_payload_offset = ftello (warc_tmp);
2149 /* Write a copy of the data to the WARC record. */
2150 int warc_tmp_written = fwrite (opt.body_data, 1, body_data_size, warc_tmp);
2151 if (warc_tmp_written != body_data_size)
2155 else if (opt.body_file && body_data_size != 0)
2157 if (warc_tmp != NULL)
2158 /* Remember end of headers / start of payload */
2159 warc_payload_offset = ftello (warc_tmp);
2161 write_error = body_file_send (sock, opt.body_file, body_data_size, warc_tmp);
2165 if (write_error < 0)
2167 CLOSE_INVALIDATE (sock);
2170 if (warc_tmp != NULL)
2173 if (write_error == -2)
2174 return WARC_TMP_FWRITEERR;
2178 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
2179 proxy ? "Proxy" : "HTTP");
2188 /* Generate a timestamp and uuid for this request. */
2189 warc_timestamp (warc_timestamp_str);
2190 warc_uuid_str (warc_request_uuid);
2192 /* Create a request record and store it in the WARC file. */
2193 warc_result = warc_write_request_record (u->url, warc_timestamp_str,
2194 warc_request_uuid, warc_ip,
2195 warc_tmp, warc_payload_offset);
2198 CLOSE_INVALIDATE (sock);
2203 /* warc_write_request_record has also closed warc_tmp. */
2208 head = read_http_response_head (sock);
2213 logputs (LOG_NOTQUIET, _("No data received.\n"));
2214 CLOSE_INVALIDATE (sock);
2220 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
2222 CLOSE_INVALIDATE (sock);
2227 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
2229 resp = resp_new (head);
2231 /* Check for status line. */
2233 statcode = resp_status (resp, &message);
2236 char *tms = datetime_str (time (NULL));
2237 logprintf (LOG_VERBOSE, "%d\n", statcode);
2238 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
2239 quotearg_style (escape_quoting_style,
2240 _("Malformed status line")));
2241 CLOSE_INVALIDATE (sock);
2248 if (H_10X (statcode))
2250 DEBUGP (("Ignoring response\n"));
2256 hs->message = xstrdup (message);
2257 if (!opt.server_response)
2258 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
2259 message ? quotearg_style (escape_quoting_style, message) : "");
2262 logprintf (LOG_VERBOSE, "\n");
2263 print_server_response (resp, " ");
2266 if (!opt.ignore_length
2267 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
2271 parsed = str_to_wgint (hdrval, NULL, 10);
2272 if (parsed == WGINT_MAX && errno == ERANGE)
2275 #### If Content-Length is out of range, it most likely
2276 means that the file is larger than 2G and that we're
2277 compiled without LFS. In that case we should probably
2278 refuse to even attempt to download the file. */
2281 else if (parsed < 0)
2283 /* Negative Content-Length; nonsensical, so we can't
2284 assume any information about the content to receive. */
2291 /* Check for keep-alive related responses. */
2292 if (!inhibit_keep_alive && contlen != -1)
2294 if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
2296 if (0 == strcasecmp (hdrval, "Close"))
2301 chunked_transfer_encoding = false;
2302 if (resp_header_copy (resp, "Transfer-Encoding", hdrval, sizeof (hdrval))
2303 && 0 == strcasecmp (hdrval, "chunked"))
2304 chunked_transfer_encoding = true;
2306 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2310 const char *scbeg, *scend;
2311 /* The jar should have been created by now. */
2312 assert (wget_cookie_jar != NULL);
2314 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2315 &scbeg, &scend)) != -1;
2318 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2319 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2320 u->path, set_cookie);
2325 /* The server has promised that it will not close the connection
2326 when we're done. This means that we can register it. */
2327 register_persistent (conn->host, conn->port, sock, using_ssl);
2329 if (statcode == HTTP_STATUS_UNAUTHORIZED)
2331 /* Authorization is required. */
2333 /* Normally we are not interested in the response body.
2334 But if we are writing a WARC file we are: we like to keep everyting. */
2338 type = resp_header_strdup (resp, "Content-Type");
2339 err = read_response_body (hs, sock, NULL, contlen, 0,
2340 chunked_transfer_encoding,
2341 u->url, warc_timestamp_str,
2342 warc_request_uuid, warc_ip, type,
2346 if (err != RETRFINISHED || hs->res < 0)
2348 CLOSE_INVALIDATE (sock);
2350 xfree_null (message);
2356 CLOSE_FINISH (sock);
2360 /* Since WARC is disabled, we are not interested in the response body. */
2361 if (keep_alive && !head_only
2362 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2363 CLOSE_FINISH (sock);
2365 CLOSE_INVALIDATE (sock);
2368 pconn.authorized = false;
2369 uerr_t auth_err = RETROK;
2370 if (!auth_finished && (user && passwd))
2372 /* IIS sends multiple copies of WWW-Authenticate, one with
2373 the value "negotiate", and other(s) with data. Loop over
2374 all the occurrences and pick the one we recognize. */
2376 const char *wabeg, *waend;
2377 char *www_authenticate = NULL;
2379 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
2380 &wabeg, &waend)) != -1;
2382 if (known_authentication_scheme_p (wabeg, waend))
2384 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
2388 if (!www_authenticate)
2390 /* If the authentication header is missing or
2391 unrecognized, there's no sense in retrying. */
2392 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
2394 else if (!basic_auth_finished
2395 || !BEGINS_WITH (www_authenticate, "Basic"))
2397 char *pth = url_full_path (u);
2400 auth_stat = xmalloc (sizeof (uerr_t));
2401 *auth_stat = RETROK;
2403 value = create_authorization_line (www_authenticate,
2405 request_method (req),
2410 auth_err = *auth_stat;
2411 if (auth_err == RETROK)
2413 request_set_header (req, "Authorization", value, rel_value);
2415 if (BEGINS_WITH (www_authenticate, "NTLM"))
2417 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
2419 /* Need to register this host as using basic auth,
2420 * so we automatically send creds next time. */
2421 register_basic_auth_host (u->host);
2425 xfree_null (message);
2429 goto retry_with_auth;
2433 /* Creating the Authorization header went wrong */
2438 /* We already did Basic auth, and it failed. Gotta
2443 xfree_null (message);
2446 if (auth_err == RETROK)
2451 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2453 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2455 pconn.authorized = true;
2458 /* Determine the local filename if needed. Notice that if -O is used
2459 * hstat.local_file is set by http_loop to the argument of -O. */
2460 if (!hs->local_file)
2462 char *local_file = NULL;
2464 /* Honor Content-Disposition whether possible. */
2465 if (!opt.content_disposition
2466 || !resp_header_copy (resp, "Content-Disposition",
2467 hdrval, sizeof (hdrval))
2468 || !parse_content_disposition (hdrval, &local_file))
2470 /* The Content-Disposition header is missing or broken.
2471 * Choose unique file name according to given URL. */
2472 hs->local_file = url_file_name (u, NULL);
2476 DEBUGP (("Parsed filename from Content-Disposition: %s\n",
2478 hs->local_file = url_file_name (u, local_file);
2482 /* TODO: perform this check only once. */
2483 if (!hs->existence_checked && file_exists_p (hs->local_file))
2485 if (opt.noclobber && !opt.output_document)
2487 /* If opt.noclobber is turned on and file already exists, do not
2488 retrieve the file. But if the output_document was given, then this
2489 test was already done and the file didn't exist. Hence the !opt.output_document */
2490 get_file_flags (hs->local_file, dt);
2494 xfree_null (message);
2495 return RETRUNNEEDED;
2497 else if (!ALLOW_CLOBBER)
2499 char *unique = unique_name (hs->local_file, true);
2500 if (unique != hs->local_file)
2501 xfree (hs->local_file);
2502 hs->local_file = unique;
2505 hs->existence_checked = true;
2507 /* Support timestamping */
2508 /* TODO: move this code out of gethttp. */
2509 if (opt.timestamping && !hs->timestamp_checked)
2511 size_t filename_len = strlen (hs->local_file);
2512 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (ORIG_SFX));
2513 bool local_dot_orig_file_exists = false;
2514 char *local_filename = NULL;
2517 if (opt.backup_converted)
2518 /* If -K is specified, we'll act on the assumption that it was specified
2519 last time these files were downloaded as well, and instead of just
2520 comparing local file X against server file X, we'll compare local
2521 file X.orig (if extant, else X) against server file X. If -K
2522 _wasn't_ specified last time, or the server contains files called
2523 *.orig, -N will be back to not operating correctly with -k. */
2525 /* Would a single s[n]printf() call be faster? --dan
2527 Definitely not. sprintf() is horribly slow. It's a
2528 different question whether the difference between the two
2529 affects a program. Usually I'd say "no", but at one
2530 point I profiled Wget, and found that a measurable and
2531 non-negligible amount of time was lost calling sprintf()
2532 in url.c. Replacing sprintf with inline calls to
2533 strcpy() and number_to_string() made a difference.
2535 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
2536 memcpy (filename_plus_orig_suffix + filename_len,
2537 ORIG_SFX, sizeof (ORIG_SFX));
2539 /* Try to stat() the .orig file. */
2540 if (stat (filename_plus_orig_suffix, &st) == 0)
2542 local_dot_orig_file_exists = true;
2543 local_filename = filename_plus_orig_suffix;
2547 if (!local_dot_orig_file_exists)
2548 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2549 if (stat (hs->local_file, &st) == 0)
2550 local_filename = hs->local_file;
2552 if (local_filename != NULL)
2553 /* There was a local file, so we'll check later to see if the version
2554 the server has is the same version we already have, allowing us to
2557 hs->orig_file_name = xstrdup (local_filename);
2558 hs->orig_file_size = st.st_size;
2559 hs->orig_file_tstamp = st.st_mtime;
2561 /* Modification time granularity is 2 seconds for Windows, so
2562 increase local time by 1 second for later comparison. */
2563 ++hs->orig_file_tstamp;
2570 hs->statcode = statcode;
2572 hs->error = xstrdup (_("Malformed status line"));
2574 hs->error = xstrdup (_("(no description)"));
2576 hs->error = xstrdup (message);
2577 xfree_null (message);
2579 type = resp_header_strdup (resp, "Content-Type");
2582 char *tmp = strchr (type, ';');
2585 /* sXXXav: only needed if IRI support is enabled */
2586 char *tmp2 = tmp + 1;
2588 while (tmp > type && c_isspace (tmp[-1]))
2592 /* Try to get remote encoding if needed */
2593 if (opt.enable_iri && !opt.encoding_remote)
2595 tmp = parse_charset (tmp2);
2597 set_content_encoding (iri, tmp);
2601 hs->newloc = resp_header_strdup (resp, "Location");
2602 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2604 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2606 wgint first_byte_pos, last_byte_pos, entity_length;
2607 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2610 contrange = first_byte_pos;
2611 contlen = last_byte_pos - first_byte_pos + 1;
2616 /* 20x responses are counted among successful by default. */
2617 if (H_20X (statcode))
2620 /* Return if redirected. */
2621 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2623 /* RFC2068 says that in case of the 300 (multiple choices)
2624 response, the server can output a preferred URL through
2625 `Location' header; otherwise, the request should be treated
2626 like GET. So, if the location is set, it will be a
2627 redirection; otherwise, just proceed normally. */
2628 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2632 logprintf (LOG_VERBOSE,
2633 _("Location: %s%s\n"),
2634 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2635 hs->newloc ? _(" [following]") : "");
2637 /* In case the caller cares to look... */
2642 /* Normally we are not interested in the response body of a redirect.
2643 But if we are writing a WARC file we are: we like to keep everyting. */
2646 int err = read_response_body (hs, sock, NULL, contlen, 0,
2647 chunked_transfer_encoding,
2648 u->url, warc_timestamp_str,
2649 warc_request_uuid, warc_ip, type,
2652 if (err != RETRFINISHED || hs->res < 0)
2654 CLOSE_INVALIDATE (sock);
2660 CLOSE_FINISH (sock);
2664 /* Since WARC is disabled, we are not interested in the response body. */
2665 if (keep_alive && !head_only
2666 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2667 CLOSE_FINISH (sock);
2669 CLOSE_INVALIDATE (sock);
2674 /* From RFC2616: The status codes 303 and 307 have
2675 been added for servers that wish to make unambiguously
2676 clear which kind of reaction is expected of the client.
2678 A 307 should be redirected using the same method,
2679 in other words, a POST should be preserved and not
2680 converted to a GET in that case.
2682 With strict adherence to RFC2616, POST requests are not
2683 converted to a GET request on 301 Permanent Redirect
2684 or 302 Temporary Redirect.
2686 A switch may be provided later based on the HTTPbis draft
2687 that allows clients to convert POST requests to GET
2688 requests on 301 and 302 response codes. */
2691 case HTTP_STATUS_TEMPORARY_REDIRECT:
2692 return NEWLOCATION_KEEP_POST;
2694 case HTTP_STATUS_MOVED_PERMANENTLY:
2695 if (opt.method && strcasecmp (opt.method, "post") != 0)
2696 return NEWLOCATION_KEEP_POST;
2698 case HTTP_STATUS_MOVED_TEMPORARILY:
2699 if (opt.method && strcasecmp (opt.method, "post") != 0)
2700 return NEWLOCATION_KEEP_POST;
2710 /* If content-type is not given, assume text/html. This is because
2711 of the multitude of broken CGI's that "forget" to generate the
2714 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2715 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2721 0 == strncasecmp (type, TEXTCSS_S, strlen (TEXTCSS_S)))
2726 if (opt.adjust_extension)
2729 /* -E / --adjust-extension / adjust_extension = on was specified,
2730 and this is a text/html file. If some case-insensitive
2731 variation on ".htm[l]" isn't already the file's suffix,
2734 ensure_extension (hs, ".html", dt);
2736 else if (*dt & TEXTCSS)
2738 ensure_extension (hs, ".css", dt);
2742 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
2743 || (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
2744 && contrange == 0 && contlen >= 0 && hs->restval >= contlen))
2746 /* If `-c' is in use and the file has been fully downloaded (or
2747 the remote file has shrunk), Wget effectively requests bytes
2748 after the end of file and the server response with 416
2749 (or 200 with a <= Content-Length. */
2750 logputs (LOG_VERBOSE, _("\
2751 \n The file is already fully retrieved; nothing to do.\n\n"));
2752 /* In case the caller inspects. */
2755 /* Mark as successfully retrieved. */
2758 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2759 might be more bytes in the body. */
2761 return RETRUNNEEDED;
2763 if ((contrange != 0 && contrange != hs->restval)
2764 || (H_PARTIAL (statcode) && !contrange))
2766 /* The Range request was somehow misunderstood by the server.
2769 CLOSE_INVALIDATE (sock);
2776 hs->contlen = contlen + contrange;
2782 /* No need to print this output if the body won't be
2783 downloaded at all, or if the original server response is
2785 logputs (LOG_VERBOSE, _("Length: "));
2788 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2789 if (contlen + contrange >= 1024)
2790 logprintf (LOG_VERBOSE, " (%s)",
2791 human_readable (contlen + contrange));
2794 if (contlen >= 1024)
2795 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2796 number_to_static_string (contlen),
2797 human_readable (contlen));
2799 logprintf (LOG_VERBOSE, _(", %s remaining"),
2800 number_to_static_string (contlen));
2804 logputs (LOG_VERBOSE,
2805 opt.ignore_length ? _("ignored") : _("unspecified"));
2807 logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
2809 logputs (LOG_VERBOSE, "\n");
2813 /* Return if we have no intention of further downloading. */
2814 if ((!(*dt & RETROKF) && !opt.content_on_error) || head_only)
2816 /* In case the caller cares to look... */
2821 /* Normally we are not interested in the response body of a error responses.
2822 But if we are writing a WARC file we are: we like to keep everyting. */
2825 int err = read_response_body (hs, sock, NULL, contlen, 0,
2826 chunked_transfer_encoding,
2827 u->url, warc_timestamp_str,
2828 warc_request_uuid, warc_ip, type,
2831 if (err != RETRFINISHED || hs->res < 0)
2833 CLOSE_INVALIDATE (sock);
2839 CLOSE_FINISH (sock);
2843 /* Since WARC is disabled, we are not interested in the response body. */
2845 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2846 servers not to send body in response to a HEAD request, and
2847 those that do will likely be caught by test_socket_open.
2848 If not, they can be worked around using
2849 `--no-http-keep-alive'. */
2850 CLOSE_FINISH (sock);
2852 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2853 /* Successfully skipped the body; also keep using the socket. */
2854 CLOSE_FINISH (sock);
2856 CLOSE_INVALIDATE (sock);
2861 return RETRFINISHED;
2865 For VMS, define common fopen() optional arguments.
2868 # define FOPEN_OPT_ARGS "fop=sqo", "acc", acc_cb, &open_id
2869 # define FOPEN_BIN_FLAG 3
2870 #else /* def __VMS */
2871 # define FOPEN_BIN_FLAG true
2872 #endif /* def __VMS [else] */
2874 /* Open the local file. */
2877 mkalldirs (hs->local_file);
2879 rotate_backups (hs->local_file);
2886 fp = fopen (hs->local_file, "ab", FOPEN_OPT_ARGS);
2887 #else /* def __VMS */
2888 fp = fopen (hs->local_file, "ab");
2889 #endif /* def __VMS [else] */
2891 else if (ALLOW_CLOBBER || count > 0)
2893 if (opt.unlink && file_exists_p (hs->local_file))
2895 int res = unlink (hs->local_file);
2898 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file,
2900 CLOSE_INVALIDATE (sock);
2911 fp = fopen (hs->local_file, "wb", FOPEN_OPT_ARGS);
2912 #else /* def __VMS */
2913 fp = fopen (hs->local_file, "wb");
2914 #endif /* def __VMS [else] */
2918 fp = fopen_excl (hs->local_file, FOPEN_BIN_FLAG);
2919 if (!fp && errno == EEXIST)
2921 /* We cannot just invent a new name and use it (which is
2922 what functions like unique_create typically do)
2923 because we told the user we'd use this name.
2924 Instead, return and retry the download. */
2925 logprintf (LOG_NOTQUIET,
2926 _("%s has sprung into existence.\n"),
2928 CLOSE_INVALIDATE (sock);
2931 return FOPEN_EXCL_ERR;
2936 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2937 CLOSE_INVALIDATE (sock);
2946 /* Print fetch message, if opt.verbose. */
2949 logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
2950 HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
2954 err = read_response_body (hs, sock, fp, contlen, contrange,
2955 chunked_transfer_encoding,
2956 u->url, warc_timestamp_str,
2957 warc_request_uuid, warc_ip, type,
2960 /* Now we no longer need to store the response header. */
2965 CLOSE_FINISH (sock);
2967 CLOSE_INVALIDATE (sock);
2975 /* The genuine HTTP loop! This is the part where the retrieval is
2976 retried, and retried, and retried, and... */
2978 http_loop (struct url *u, struct url *original_url, char **newloc,
2979 char **local_file, const char *referer, int *dt, struct url *proxy,
2983 bool got_head = false; /* used for time-stamping and filename detection */
2984 bool time_came_from_head = false;
2985 bool got_name = false;
2988 uerr_t err, ret = TRYLIMEXC;
2989 time_t tmr = -1; /* remote time-stamp */
2990 struct http_stat hstat; /* HTTP status */
2992 bool send_head_first = true;
2994 bool force_full_retrieve = false;
2997 /* If we are writing to a WARC file: always retrieve the whole file. */
2998 if (opt.warc_filename != NULL)
2999 force_full_retrieve = true;
3002 /* Assert that no value for *LOCAL_FILE was passed. */
3003 assert (local_file == NULL || *local_file == NULL);
3005 /* Set LOCAL_FILE parameter. */
3006 if (local_file && opt.output_document)
3007 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
3009 /* Reset NEWLOC parameter. */
3012 /* This used to be done in main(), but it's a better idea to do it
3013 here so that we don't go through the hoops if we're just using
3018 /* Warn on (likely bogus) wildcard usage in HTTP. */
3019 if (opt.ftp_glob && has_wildcards_p (u->path))
3020 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
3022 /* Setup hstat struct. */
3024 hstat.referer = referer;
3026 if (opt.output_document)
3028 hstat.local_file = xstrdup (opt.output_document);
3031 else if (!opt.content_disposition)
3034 url_file_name (opt.trustservernames ? u : original_url, NULL);
3038 if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
3040 /* If opt.noclobber is turned on and file already exists, do not
3041 retrieve the file. But if the output_document was given, then this
3042 test was already done and the file didn't exist. Hence the !opt.output_document */
3043 get_file_flags (hstat.local_file, dt);
3048 /* Reset the counter. */
3051 /* Reset the document type. */
3054 /* Skip preliminary HEAD request if we're not in spider mode. */
3056 send_head_first = false;
3058 /* Send preliminary HEAD request if --content-disposition and -c are used
3060 if (opt.content_disposition && opt.always_rest)
3061 send_head_first = true;
3063 /* Send preliminary HEAD request if -N is given and we have an existing
3064 * destination file. */
3065 if (!opt.output_document)
3066 file_name = url_file_name (opt.trustservernames ? u : original_url, NULL);
3068 file_name = xstrdup (opt.output_document);
3069 if (opt.timestamping && (file_exists_p (file_name)
3070 || opt.content_disposition))
3071 send_head_first = true;
3077 /* Increment the pass counter. */
3079 sleep_between_retrievals (count);
3081 /* Get the current time string. */
3082 tms = datetime_str (time (NULL));
3084 if (opt.spider && !got_head)
3085 logprintf (LOG_VERBOSE, _("\
3086 Spider mode enabled. Check if remote file exists.\n"));
3088 /* Print fetch message, if opt.verbose. */
3091 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3096 sprintf (tmp, _("(try:%2d)"), count);
3097 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
3102 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
3107 ws_changetitle (hurl);
3112 /* Default document type is empty. However, if spider mode is
3113 on or time-stamping is employed, HEAD_ONLY commands is
3114 encoded within *dt. */
3115 if (send_head_first && !got_head)
3120 /* Decide whether or not to restart. */
3121 if (force_full_retrieve)
3122 hstat.restval = hstat.len;
3123 else if (opt.always_rest
3125 && stat (hstat.local_file, &st) == 0
3126 && S_ISREG (st.st_mode))
3127 /* When -c is used, continue from on-disk size. (Can't use
3128 hstat.len even if count>1 because we don't want a failed
3129 first attempt to clobber existing data.) */
3130 hstat.restval = st.st_size;
3132 /* otherwise, continue where the previous try left off */
3133 hstat.restval = hstat.len;
3137 /* Decide whether to send the no-cache directive. We send it in
3139 a) we're using a proxy, and we're past our first retrieval.
3140 Some proxies are notorious for caching incomplete data, so
3141 we require a fresh get.
3142 b) caching is explicitly inhibited. */
3143 if ((proxy && count > 1) /* a */
3144 || !opt.allow_cache) /* b */
3145 *dt |= SEND_NOCACHE;
3147 *dt &= ~SEND_NOCACHE;
3149 /* Try fetching the document, or at least its head. */
3150 err = gethttp (u, &hstat, dt, proxy, iri, count);
3153 tms = datetime_str (time (NULL));
3155 /* Get the new location (with or without the redirection). */
3157 *newloc = xstrdup (hstat.newloc);
3161 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
3162 case CONERROR: case READERR: case WRITEFAILED:
3163 case RANGEERR: case FOPEN_EXCL_ERR:
3164 /* Non-fatal errors continue executing the loop, which will
3165 bring them to "while" statement at the end, to judge
3166 whether the number of tries was exceeded. */
3167 printwhat (count, opt.ntry);
3169 case FWRITEERR: case FOPENERR:
3170 /* Another fatal error. */
3171 logputs (LOG_VERBOSE, "\n");
3172 logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
3173 quote (hstat.local_file), strerror (errno));
3174 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case SSLINITFAILED:
3175 case CONTNOTSUPPORTED: case VERIFCERTERR: case FILEBADFILE:
3177 /* Fatal errors just return from the function. */
3181 /* A missing attribute in a Header is a fatal Protocol error. */
3182 logputs (LOG_VERBOSE, "\n");
3183 logprintf (LOG_NOTQUIET, _("Required attribute missing from Header received.\n"));
3187 logputs (LOG_VERBOSE, "\n");
3188 logprintf (LOG_NOTQUIET, _("Username/Password Authentication Failed.\n"));
3192 /* A fatal WARC error. */
3193 logputs (LOG_VERBOSE, "\n");
3194 logprintf (LOG_NOTQUIET, _("Cannot write to WARC file.\n"));
3197 case WARC_TMP_FOPENERR: case WARC_TMP_FWRITEERR:
3198 /* A fatal WARC error. */
3199 logputs (LOG_VERBOSE, "\n");
3200 logprintf (LOG_NOTQUIET, _("Cannot write to temporary WARC file.\n"));
3204 /* Another fatal error. */
3205 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
3209 /* Another fatal error. */
3210 logputs (LOG_VERBOSE, "\n");
3211 logprintf (LOG_NOTQUIET, _("Cannot unlink %s (%s).\n"),
3212 quote (hstat.local_file), strerror (errno));
3216 case NEWLOCATION_KEEP_POST:
3217 /* Return the new location to the caller. */
3220 logprintf (LOG_NOTQUIET,
3221 _("ERROR: Redirection (%d) without location.\n"),
3231 /* The file was already fully retrieved. */
3235 /* Deal with you later. */
3238 /* All possibilities should have been exhausted. */
3242 if (!(*dt & RETROKF))
3247 /* #### Ugly ugly ugly! */
3248 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3249 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
3252 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
3254 && (hstat.statcode == 500 || hstat.statcode == 501))
3259 /* Maybe we should always keep track of broken links, not just in
3261 * Don't log error if it was UTF-8 encoded because we will try
3262 * once unencoded. */
3263 else if (opt.spider && !iri->utf8_encode)
3265 /* #### Again: ugly ugly ugly! */
3267 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3268 nonexisting_url (hurl);
3269 logprintf (LOG_NOTQUIET, _("\
3270 Remote file does not exist -- broken link!!!\n"));
3274 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
3275 tms, hstat.statcode,
3276 quotearg_style (escape_quoting_style, hstat.error));
3278 logputs (LOG_VERBOSE, "\n");
3284 /* Did we get the time-stamp? */
3287 got_head = true; /* no more time-stamping */
3289 if (opt.timestamping && !hstat.remote_time)
3291 logputs (LOG_NOTQUIET, _("\
3292 Last-modified header missing -- time-stamps turned off.\n"));
3294 else if (hstat.remote_time)
3296 /* Convert the date-string into struct tm. */
3297 tmr = http_atotm (hstat.remote_time);
3298 if (tmr == (time_t) (-1))
3299 logputs (LOG_VERBOSE, _("\
3300 Last-modified header invalid -- time-stamp ignored.\n"));
3301 if (*dt & HEAD_ONLY)
3302 time_came_from_head = true;
3305 if (send_head_first)
3307 /* The time-stamping section. */
3308 if (opt.timestamping)
3310 if (hstat.orig_file_name) /* Perform the following
3311 checks only if the file
3313 download already exists. */
3315 if (hstat.remote_time &&
3316 tmr != (time_t) (-1))
3318 /* Now time-stamping can be used validly.
3319 Time-stamping means that if the sizes of
3320 the local and remote file match, and local
3321 file is newer than the remote file, it will
3322 not be retrieved. Otherwise, the normal
3323 download procedure is resumed. */
3324 if (hstat.orig_file_tstamp >= tmr)
3326 if (hstat.contlen == -1
3327 || hstat.orig_file_size == hstat.contlen)
3329 logprintf (LOG_VERBOSE, _("\
3330 Server file no newer than local file %s -- not retrieving.\n\n"),
3331 quote (hstat.orig_file_name));
3337 logprintf (LOG_VERBOSE, _("\
3338 The sizes do not match (local %s) -- retrieving.\n"),
3339 number_to_static_string (hstat.orig_file_size));
3344 force_full_retrieve = true;
3345 logputs (LOG_VERBOSE,
3346 _("Remote file is newer, retrieving.\n"));
3349 logputs (LOG_VERBOSE, "\n");
3353 /* free_hstat (&hstat); */
3354 hstat.timestamp_checked = true;
3359 bool finished = true;
3364 logputs (LOG_VERBOSE, _("\
3365 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
3370 logprintf (LOG_VERBOSE, _("\
3371 Remote file exists but does not contain any link -- not retrieving.\n\n"));
3372 ret = RETROK; /* RETRUNNEEDED is not for caller. */
3379 logprintf (LOG_VERBOSE, _("\
3380 Remote file exists and could contain further links,\n\
3381 but recursion is disabled -- not retrieving.\n\n"));
3385 logprintf (LOG_VERBOSE, _("\
3386 Remote file exists.\n\n"));
3388 ret = RETROK; /* RETRUNNEEDED is not for caller. */
3393 logprintf (LOG_NONVERBOSE,
3394 _("%s URL: %s %2d %s\n"),
3395 tms, u->url, hstat.statcode,
3396 hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
3403 count = 0; /* the retrieve count for HEAD is reset */
3405 } /* send_head_first */
3408 if (opt.useservertimestamps
3409 && (tmr != (time_t) (-1))
3410 && ((hstat.len == hstat.contlen) ||
3411 ((hstat.res == 0) && (hstat.contlen == -1))))
3413 const char *fl = NULL;
3414 set_local_file (&fl, hstat.local_file);
3418 /* Reparse time header, in case it's changed. */
3419 if (time_came_from_head
3420 && hstat.remote_time && hstat.remote_time[0])
3422 newtmr = http_atotm (hstat.remote_time);
3423 if (newtmr != (time_t)-1)
3429 /* End of time-stamping section. */
3431 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
3432 total_download_time += hstat.dltime;
3434 if (hstat.len == hstat.contlen)
3438 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3440 logprintf (LOG_VERBOSE,
3442 ? _("%s (%s) - written to stdout %s[%s/%s]\n\n")
3443 : _("%s (%s) - %s saved [%s/%s]\n\n"),
3445 write_to_stdout ? "" : quote (hstat.local_file),
3446 number_to_static_string (hstat.len),
3447 number_to_static_string (hstat.contlen));
3448 logprintf (LOG_NONVERBOSE,
3449 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
3451 number_to_static_string (hstat.len),
3452 number_to_static_string (hstat.contlen),
3453 hstat.local_file, count);
3456 total_downloaded_bytes += hstat.rd_size;
3458 /* Remember that we downloaded the file for later ".orig" code. */
3459 if (*dt & ADDED_HTML_EXTENSION)
3460 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3462 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3467 else if (hstat.res == 0) /* No read error */
3469 if (hstat.contlen == -1) /* We don't know how much we were supposed
3470 to get, so assume we succeeded. */
3474 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3476 logprintf (LOG_VERBOSE,
3478 ? _("%s (%s) - written to stdout %s[%s]\n\n")
3479 : _("%s (%s) - %s saved [%s]\n\n"),
3481 write_to_stdout ? "" : quote (hstat.local_file),
3482 number_to_static_string (hstat.len));
3483 logprintf (LOG_NONVERBOSE,
3484 "%s URL:%s [%s] -> \"%s\" [%d]\n",
3485 tms, u->url, number_to_static_string (hstat.len),
3486 hstat.local_file, count);
3489 total_downloaded_bytes += hstat.rd_size;
3491 /* Remember that we downloaded the file for later ".orig" code. */
3492 if (*dt & ADDED_HTML_EXTENSION)
3493 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3495 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3500 else if (hstat.len < hstat.contlen) /* meaning we lost the
3501 connection too soon */
3503 logprintf (LOG_VERBOSE,
3504 _("%s (%s) - Connection closed at byte %s. "),
3505 tms, tmrate, number_to_static_string (hstat.len));
3506 printwhat (count, opt.ntry);
3509 else if (hstat.len != hstat.restval)
3510 /* Getting here would mean reading more data than
3511 requested with content-length, which we never do. */
3515 /* Getting here probably means that the content-length was
3516 * _less_ than the original, local size. We should probably
3517 * truncate or re-read, or something. FIXME */
3522 else /* from now on hstat.res can only be -1 */
3524 if (hstat.contlen == -1)
3526 logprintf (LOG_VERBOSE,
3527 _("%s (%s) - Read error at byte %s (%s)."),
3528 tms, tmrate, number_to_static_string (hstat.len),
3530 printwhat (count, opt.ntry);
3533 else /* hstat.res == -1 and contlen is given */
3535 logprintf (LOG_VERBOSE,
3536 _("%s (%s) - Read error at byte %s/%s (%s). "),
3538 number_to_static_string (hstat.len),
3539 number_to_static_string (hstat.contlen),
3541 printwhat (count, opt.ntry);
3547 while (!opt.ntry || (count < opt.ntry));
3550 if (ret == RETROK && local_file)
3551 *local_file = xstrdup (hstat.local_file);
3552 free_hstat (&hstat);
3557 /* Check whether the result of strptime() indicates success.
3558 strptime() returns the pointer to how far it got to in the string.
3559 The processing has been successful if the string is at `GMT' or
3560 `+X', or at the end of the string.
3562 In extended regexp parlance, the function returns 1 if P matches
3563 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
3564 can return) is considered a failure and 0 is returned. */
3566 check_end (const char *p)
3570 while (c_isspace (*p))
3573 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
3574 || ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
3580 /* Convert the textual specification of time in TIME_STRING to the
3581 number of seconds since the Epoch.
3583 TIME_STRING can be in any of the three formats RFC2616 allows the
3584 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
3585 as well as the time format used in the Set-Cookie header.
3586 Timezones are ignored, and should be GMT.
3588 Return the computed time_t representation, or -1 if the conversion
3591 This function uses strptime with various string formats for parsing
3592 TIME_STRING. This results in a parser that is not as lenient in
3593 interpreting TIME_STRING as I would like it to be. Being based on
3594 strptime, it always allows shortened months, one-digit days, etc.,
3595 but due to the multitude of formats in which time can be
3596 represented, an ideal HTTP time parser would be even more
3597 forgiving. It should completely ignore things like week days and
3598 concentrate only on the various forms of representing years,
3599 months, days, hours, minutes, and seconds. For example, it would
3600 be nice if it accepted ISO 8601 out of the box.
3602 I've investigated free and PD code for this purpose, but none was
3603 usable. getdate was big and unwieldy, and had potential copyright
3604 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
3605 distributed with phttpd, is excellent, but we cannot use it because
3606 it is not assigned to the FSF. So I stuck it with strptime. */
3609 http_atotm (const char *time_string)
3611 /* NOTE: Solaris strptime man page claims that %n and %t match white
3612 space, but that's not universally available. Instead, we simply
3613 use ` ' to mean "skip all WS", which works under all strptime
3614 implementations I've tested. */
3616 static const char *time_formats[] = {
3617 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
3618 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
3619 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
3620 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
3621 (used in Set-Cookie, defined in the
3622 Netscape cookie specification.) */
3624 const char *oldlocale;
3625 char savedlocale[256];
3627 time_t ret = (time_t) -1;
3629 /* Solaris strptime fails to recognize English month names in
3630 non-English locales, which we work around by temporarily setting
3631 locale to C before invoking strptime. */
3632 oldlocale = setlocale (LC_TIME, NULL);
3635 size_t l = strlen (oldlocale) + 1;
3636 if (l >= sizeof savedlocale)
3637 savedlocale[0] = '\0';
3639 memcpy (savedlocale, oldlocale, l);
3641 else savedlocale[0] = '\0';
3643 setlocale (LC_TIME, "C");
3645 for (i = 0; i < countof (time_formats); i++)
3649 /* Some versions of strptime use the existing contents of struct
3650 tm to recalculate the date according to format. Zero it out
3651 to prevent stack garbage from influencing strptime. */
3654 if (check_end (strptime (time_string, time_formats[i], &t)))
3661 /* Restore the previous locale. */
3663 setlocale (LC_TIME, savedlocale);
3668 /* Authorization support: We support three authorization schemes:
3670 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
3672 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
3673 consisting of answering to the server's challenge with the proper
3676 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
3677 Stenberg for libcurl. Like digest, NTLM is based on a
3678 challenge-response mechanism, but unlike digest, it is non-standard
3679 (authenticates TCP connections rather than requests), undocumented
3680 and Microsoft-specific. */
3682 /* Create the authentication header contents for the `Basic' scheme.
3683 This is done by encoding the string "USER:PASS" to base64 and
3684 prepending the string "Basic " in front of it. */
3687 basic_authentication_encode (const char *user, const char *passwd)
3690 int len1 = strlen (user) + 1 + strlen (passwd);
3692 t1 = (char *)alloca (len1 + 1);
3693 sprintf (t1, "%s:%s", user, passwd);
3695 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
3696 base64_encode (t1, len1, t2);
3698 return concat_strings ("Basic ", t2, (char *) 0);
3701 #define SKIP_WS(x) do { \
3702 while (c_isspace (*(x))) \
3706 #ifdef ENABLE_DIGEST
3707 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
3708 an array of 16 bytes containing the hash keys, and BUF should be a
3709 buffer of 33 writable characters (32 for hex digits plus one for
3710 zero termination). */
3712 dump_hash (char *buf, const unsigned char *hash)
3716 for (i = 0; i < MD5_DIGEST_SIZE; i++, hash++)
3718 *buf++ = XNUM_TO_digit (*hash >> 4);
3719 *buf++ = XNUM_TO_digit (*hash & 0xf);
3724 /* Take the line apart to find the challenge, and compose a digest
3725 authorization header. See RFC2069 section 2.1.2. */
3727 digest_authentication_encode (const char *au, const char *user,
3728 const char *passwd, const char *method,
3729 const char *path, uerr_t *auth_err)
3731 static char *realm, *opaque, *nonce, *qop, *algorithm;
3736 { "realm", &realm },
3737 { "opaque", &opaque },
3738 { "nonce", &nonce },
3740 { "algorithm", &algorithm }
3742 char cnonce[16] = "";
3746 param_token name, value;
3749 realm = opaque = nonce = algorithm = qop = NULL;
3751 au += 6; /* skip over `Digest' */
3752 while (extract_param (&au, &name, &value, ',', NULL))
3755 size_t namelen = name.e - name.b;
3756 for (i = 0; i < countof (options); i++)
3757 if (namelen == strlen (options[i].name)
3758 && 0 == strncmp (name.b, options[i].name,
3761 *options[i].variable = strdupdelim (value.b, value.e);
3766 if (qop != NULL && strcmp(qop,"auth"))
3768 logprintf (LOG_NOTQUIET, _("Unsupported quality of protection '%s'.\n"), qop);
3769 xfree_null (qop); /* force freeing mem and return */
3772 else if (algorithm != NULL && strcmp (algorithm,"MD5") && strcmp (algorithm,"MD5-sess"))
3774 logprintf (LOG_NOTQUIET, _("Unsupported algorithm '%s'.\n"), algorithm);
3775 xfree_null (qop); /* force freeing mem and return */
3779 if (!realm || !nonce || !user || !passwd || !path || !method || !qop)
3782 xfree_null (opaque);
3785 xfree_null (algorithm);
3787 *auth_err = UNKNOWNATTR;
3789 *auth_err = ATTRMISSING;
3793 /* Calculate the digest value. */
3796 unsigned char hash[MD5_DIGEST_SIZE];
3797 char a1buf[MD5_DIGEST_SIZE * 2 + 1], a2buf[MD5_DIGEST_SIZE * 2 + 1];
3798 char response_digest[MD5_DIGEST_SIZE * 2 + 1];
3800 /* A1BUF = H(user ":" realm ":" password) */
3801 md5_init_ctx (&ctx);
3802 md5_process_bytes ((unsigned char *)user, strlen (user), &ctx);
3803 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3804 md5_process_bytes ((unsigned char *)realm, strlen (realm), &ctx);
3805 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3806 md5_process_bytes ((unsigned char *)passwd, strlen (passwd), &ctx);
3807 md5_finish_ctx (&ctx, hash);
3809 dump_hash (a1buf, hash);
3811 if (algorithm && !strcmp (algorithm, "MD5-sess"))
3813 /* A1BUF = H( H(user ":" realm ":" password) ":" nonce ":" cnonce ) */
3814 snprintf (cnonce, sizeof (cnonce), "%08x", random_number(INT_MAX));
3816 md5_init_ctx (&ctx);
3817 // md5_process_bytes (hash, MD5_DIGEST_SIZE, &ctx);
3818 md5_process_bytes (a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3819 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3820 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3821 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3822 md5_process_bytes ((unsigned char *)cnonce, strlen (cnonce), &ctx);
3823 md5_finish_ctx (&ctx, hash);
3825 dump_hash (a1buf, hash);
3828 /* A2BUF = H(method ":" path) */
3829 md5_init_ctx (&ctx);
3830 md5_process_bytes ((unsigned char *)method, strlen (method), &ctx);
3831 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3832 md5_process_bytes ((unsigned char *)path, strlen (path), &ctx);
3833 md5_finish_ctx (&ctx, hash);
3834 dump_hash (a2buf, hash);
3836 if (qop && (!strcmp(qop, "auth") || !strcmp (qop, "auth-int")))
3838 /* RFC 2617 Digest Access Authentication */
3839 /* generate random hex string */
3841 snprintf(cnonce, sizeof(cnonce), "%08x", random_number(INT_MAX));
3843 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" noncecount ":" clientnonce ":" qop ": " A2BUF) */
3844 md5_init_ctx (&ctx);
3845 md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3846 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3847 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3848 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3849 md5_process_bytes ((unsigned char *)"00000001", 8, &ctx); /* TODO: keep track of server nonce values */
3850 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3851 md5_process_bytes ((unsigned char *)cnonce, strlen(cnonce), &ctx);
3852 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3853 md5_process_bytes ((unsigned char *)qop, strlen(qop), &ctx);
3854 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3855 md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
3856 md5_finish_ctx (&ctx, hash);
3860 /* RFC 2069 Digest Access Authentication */
3861 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3862 md5_init_ctx (&ctx);
3863 md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3864 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3865 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3866 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3867 md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
3868 md5_finish_ctx (&ctx, hash);
3871 dump_hash (response_digest, hash);
3873 res_size = strlen (user)
3877 + 2 * MD5_DIGEST_SIZE /*strlen (response_digest)*/
3878 + (opaque ? strlen (opaque) : 0)
3879 + (algorithm ? strlen (algorithm) : 0)
3884 res = xmalloc (res_size);
3886 if (qop && !strcmp (qop, "auth"))
3888 res_len = snprintf (res, res_size, "Digest "\
3889 "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\""\
3890 ", qop=auth, nc=00000001, cnonce=\"%s\"",
3891 user, realm, nonce, path, response_digest, cnonce);
3896 res_len = snprintf (res, res_size, "Digest "\
3897 "username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3898 user, realm, nonce, path, response_digest);
3903 res_len += snprintf(res + res_len, res_size - res_len, ", opaque=\"%s\"", opaque);
3908 snprintf(res + res_len, res_size - res_len, ", algorithm=\"%s\"", algorithm);
3913 xfree_null (opaque);
3916 xfree_null (algorithm);
3920 #endif /* ENABLE_DIGEST */
3922 /* Computing the size of a string literal must take into account that
3923 value returned by sizeof includes the terminating \0. */
3924 #define STRSIZE(literal) (sizeof (literal) - 1)
3926 /* Whether chars in [b, e) begin with the literal string provided as
3927 first argument and are followed by whitespace or terminating \0.
3928 The comparison is case-insensitive. */
3929 #define STARTS(literal, b, e) \
3931 && ((size_t) ((e) - (b))) >= STRSIZE (literal) \
3932 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3933 && ((size_t) ((e) - (b)) == STRSIZE (literal) \
3934 || c_isspace (b[STRSIZE (literal)])))
3937 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3939 return STARTS ("Basic", hdrbeg, hdrend)
3940 #ifdef ENABLE_DIGEST
3941 || STARTS ("Digest", hdrbeg, hdrend)
3944 || STARTS ("NTLM", hdrbeg, hdrend)
3951 /* Create the HTTP authorization request header. When the
3952 `WWW-Authenticate' response header is seen, according to the
3953 authorization scheme specified in that header (`Basic' and `Digest'
3954 are supported by the current implementation), produce an
3955 appropriate HTTP authorization request header. */
3957 create_authorization_line (const char *au, const char *user,
3958 const char *passwd, const char *method,
3959 const char *path, bool *finished, uerr_t *auth_err)
3961 /* We are called only with known schemes, so we can dispatch on the
3963 switch (c_toupper (*au))
3965 case 'B': /* Basic */
3967 return basic_authentication_encode (user, passwd);
3968 #ifdef ENABLE_DIGEST
3969 case 'D': /* Digest */
3971 return digest_authentication_encode (au, user, passwd, method, path, auth_err);
3974 case 'N': /* NTLM */
3975 if (!ntlm_input (&pconn.ntlm, au))
3980 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3983 /* We shouldn't get here -- this function should be only called
3984 with values approved by known_authentication_scheme_p. */
3992 if (!wget_cookie_jar)
3993 wget_cookie_jar = cookie_jar_new ();
3994 if (opt.cookies_input && !cookies_loaded_p)
3996 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3997 cookies_loaded_p = true;
4004 if (wget_cookie_jar)
4005 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
4011 xfree_null (pconn.host);
4012 if (wget_cookie_jar)
4013 cookie_jar_delete (wget_cookie_jar);
4017 ensure_extension (struct http_stat *hs, const char *ext, int *dt)
4019 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
4021 int len = strlen (ext);
4024 strncpy (shortext, ext, len - 1);
4025 shortext[len - 1] = '\0';
4028 if (last_period_in_local_filename == NULL
4029 || !(0 == strcasecmp (last_period_in_local_filename, shortext)
4030 || 0 == strcasecmp (last_period_in_local_filename, ext)))
4032 int local_filename_len = strlen (hs->local_file);
4033 /* Resize the local file, allowing for ".html" preceded by
4034 optional ".NUMBER". */
4035 hs->local_file = xrealloc (hs->local_file,
4036 local_filename_len + 24 + len);
4037 strcpy (hs->local_file + local_filename_len, ext);
4038 /* If clobbering is not allowed and the file, as named,
4039 exists, tack on ".NUMBER.html" instead. */
4040 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
4044 sprintf (hs->local_file + local_filename_len,
4045 ".%d%s", ext_num++, ext);
4046 while (file_exists_p (hs->local_file));
4048 *dt |= ADDED_HTML_EXTENSION;
4056 test_parse_content_disposition()
4064 { "filename=\"file.ext\"", "file.ext", true },
4065 { "attachment; filename=\"file.ext\"", "file.ext", true },
4066 { "attachment; filename=\"file.ext\"; dummy", "file.ext", true },
4067 { "attachment", NULL, false },
4068 { "attachement; filename*=UTF-8'en-US'hello.txt", "hello.txt", true },
4069 { "attachement; filename*0=\"hello\"; filename*1=\"world.txt\"", "helloworld.txt", true },
4072 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
4077 res = parse_content_disposition (test_array[i].hdrval, &filename);
4079 mu_assert ("test_parse_content_disposition: wrong result",
4080 res == test_array[i].result
4082 || 0 == strcmp (test_array[i].filename, filename)));
4088 #endif /* TESTING */
4091 * vim: et sts=2 sw=2 cino+={s