2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 *);
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. At least request_set_method must be
151 called before the request can be used. */
153 static struct request *
156 struct request *req = xnew0 (struct request);
158 req->headers = xnew_array (struct request_header, req->hcapacity);
162 /* Set the request's method and its arguments. METH should be a
163 literal string (or it should outlive the request) because it will
164 not be freed. ARG will be freed by request_free. */
167 request_set_method (struct request *req, const char *meth, char *arg)
173 /* Return the method string passed with the last call to
174 request_set_method. */
177 request_method (const struct request *req)
182 /* Free one header according to the release policy specified with
183 request_set_header. */
186 release_header (struct request_header *hdr)
188 switch (hdr->release_policy)
205 /* Set the request named NAME to VALUE. Specifically, this means that
206 a "NAME: VALUE\r\n" header line will be used in the request. If a
207 header with the same name previously existed in the request, its
208 value will be replaced by this one. A NULL value means do nothing.
210 RELEASE_POLICY determines whether NAME and VALUE should be released
211 (freed) with request_free. Allowed values are:
213 - rel_none - don't free NAME or VALUE
214 - rel_name - free NAME when done
215 - rel_value - free VALUE when done
216 - rel_both - free both NAME and VALUE when done
218 Setting release policy is useful when arguments come from different
219 sources. For example:
221 // Don't free literal strings!
222 request_set_header (req, "Pragma", "no-cache", rel_none);
224 // Don't free a global variable, we'll need it later.
225 request_set_header (req, "Referer", opt.referer, rel_none);
227 // Value freshly allocated, free it when done.
228 request_set_header (req, "Range",
229 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
234 request_set_header (struct request *req, char *name, char *value,
235 enum rp release_policy)
237 struct request_header *hdr;
242 /* A NULL value is a no-op; if freeing the name is requested,
243 free it now to avoid leaks. */
244 if (release_policy == rel_name || release_policy == rel_both)
249 for (i = 0; i < req->hcount; i++)
251 hdr = &req->headers[i];
252 if (0 == strcasecmp (name, hdr->name))
254 /* Replace existing header. */
255 release_header (hdr);
258 hdr->release_policy = release_policy;
263 /* Install new header. */
265 if (req->hcount >= req->hcapacity)
267 req->hcapacity <<= 1;
268 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
270 hdr = &req->headers[req->hcount++];
273 hdr->release_policy = release_policy;
276 /* Like request_set_header, but sets the whole header line, as
277 provided by the user using the `--header' option. For example,
278 request_set_user_header (req, "Foo: bar") works just like
279 request_set_header (req, "Foo", "bar"). */
282 request_set_user_header (struct request *req, const char *header)
285 const char *p = strchr (header, ':');
288 BOUNDED_TO_ALLOCA (header, p, name);
290 while (c_isspace (*p))
292 request_set_header (req, xstrdup (name), (char *) p, rel_name);
295 /* Remove the header with specified name from REQ. Returns true if
296 the header was actually removed, false otherwise. */
299 request_remove_header (struct request *req, char *name)
302 for (i = 0; i < req->hcount; i++)
304 struct request_header *hdr = &req->headers[i];
305 if (0 == strcasecmp (name, hdr->name))
307 release_header (hdr);
308 /* Move the remaining headers by one. */
309 if (i < req->hcount - 1)
310 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
318 #define APPEND(p, str) do { \
319 int A_len = strlen (str); \
320 memcpy (p, str, A_len); \
324 /* Construct the request and write it to FD using fd_write.
325 If warc_tmp is set to a file pointer, the request string will
326 also be written to that file. */
329 request_send (const struct request *req, int fd, FILE *warc_tmp)
331 char *request_string, *p;
332 int i, size, write_error;
334 /* Count the request size. */
337 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
338 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
340 for (i = 0; i < req->hcount; i++)
342 struct request_header *hdr = &req->headers[i];
343 /* NAME ": " VALUE "\r\n" */
344 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
350 p = request_string = alloca_array (char, size);
352 /* Generate the request. */
354 APPEND (p, req->method); *p++ = ' ';
355 APPEND (p, req->arg); *p++ = ' ';
356 memcpy (p, "HTTP/1.1\r\n", 10); p += 10;
358 for (i = 0; i < req->hcount; i++)
360 struct request_header *hdr = &req->headers[i];
361 APPEND (p, hdr->name);
362 *p++ = ':', *p++ = ' ';
363 APPEND (p, hdr->value);
364 *p++ = '\r', *p++ = '\n';
367 *p++ = '\r', *p++ = '\n', *p++ = '\0';
368 assert (p - request_string == size);
372 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
374 /* Send the request to the server. */
376 write_error = fd_write (fd, request_string, size - 1, -1);
378 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
380 else if (warc_tmp != NULL)
382 /* Write a copy of the data to the WARC record. */
383 int warc_tmp_written = fwrite (request_string, 1, size - 1, warc_tmp);
384 if (warc_tmp_written != size - 1)
390 /* Release the resources used by REQ. */
393 request_free (struct request *req)
396 xfree_null (req->arg);
397 for (i = 0; i < req->hcount; i++)
398 release_header (&req->headers[i]);
399 xfree_null (req->headers);
403 static struct hash_table *basic_authed_hosts;
405 /* Find out if this host has issued a Basic challenge yet; if so, give
406 * it the username, password. A temporary measure until we can get
407 * proper authentication in place. */
410 maybe_send_basic_creds (const char *hostname, const char *user,
411 const char *passwd, struct request *req)
413 bool do_challenge = false;
415 if (opt.auth_without_challenge)
417 DEBUGP (("Auth-without-challenge set, sending Basic credentials.\n"));
420 else if (basic_authed_hosts
421 && hash_table_contains(basic_authed_hosts, hostname))
423 DEBUGP (("Found %s in basic_authed_hosts.\n", quote (hostname)));
428 DEBUGP (("Host %s has not issued a general basic challenge.\n",
433 request_set_header (req, "Authorization",
434 basic_authentication_encode (user, passwd),
441 register_basic_auth_host (const char *hostname)
443 if (!basic_authed_hosts)
445 basic_authed_hosts = make_nocase_string_hash_table (1);
447 if (!hash_table_contains(basic_authed_hosts, hostname))
449 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
450 DEBUGP (("Inserted %s into basic_authed_hosts\n", quote (hostname)));
455 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
456 PROMISED_SIZE bytes are sent over the wire -- if the file is
457 longer, read only that much; if the file is shorter, report an error.
458 If warc_tmp is set to a file pointer, the post data will
459 also be written to that file. */
462 post_file (int sock, const char *file_name, wgint promised_size, FILE *warc_tmp)
464 static char chunk[8192];
469 DEBUGP (("[writing POST file %s ... ", file_name));
471 fp = fopen (file_name, "rb");
474 while (!feof (fp) && written < promised_size)
477 int length = fread (chunk, 1, sizeof (chunk), fp);
480 towrite = MIN (promised_size - written, length);
481 write_error = fd_write (sock, chunk, towrite, -1);
487 if (warc_tmp != NULL)
489 /* Write a copy of the data to the WARC record. */
490 int warc_tmp_written = fwrite (chunk, 1, towrite, warc_tmp);
491 if (warc_tmp_written != towrite)
501 /* If we've written less than was promised, report a (probably
502 nonsensical) error rather than break the promise. */
503 if (written < promised_size)
509 assert (written == promised_size);
510 DEBUGP (("done]\n"));
514 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
515 If so, return the pointer to the position after the line, otherwise
516 return NULL. This is used as callback to fd_read_hunk. The data
517 between START and PEEKED has been read and cannot be "unread"; the
518 data after PEEKED has only been peeked. */
521 response_head_terminator (const char *start, const char *peeked, int peeklen)
525 /* If at first peek, verify whether HUNK starts with "HTTP". If
526 not, this is a HTTP/0.9 request and we must bail out without
528 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
531 /* Look for "\n[\r]\n", and return the following position if found.
532 Start two chars before the current to cover the possibility that
533 part of the terminator (e.g. "\n\r") arrived in the previous
535 p = peeked - start < 2 ? start : peeked - 2;
536 end = peeked + peeklen;
538 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
539 for (; p < end - 2; p++)
542 if (p[1] == '\r' && p[2] == '\n')
544 else if (p[1] == '\n')
547 /* p==end-2: check for \n\n directly preceding END. */
548 if (p[0] == '\n' && p[1] == '\n')
554 /* The maximum size of a single HTTP response we care to read. Rather
555 than being a limit of the reader implementation, this limit
556 prevents Wget from slurping all available memory upon encountering
557 malicious or buggy server output, thus protecting the user. Define
558 it to 0 to remove the limit. */
560 #define HTTP_RESPONSE_MAX_SIZE 65536
562 /* Read the HTTP request head from FD and return it. The error
563 conditions are the same as with fd_read_hunk.
565 To support HTTP/0.9 responses, this function tries to make sure
566 that the data begins with "HTTP". If this is not the case, no data
567 is read and an empty request is returned, so that the remaining
568 data can be treated as body. */
571 read_http_response_head (int fd)
573 return fd_read_hunk (fd, response_head_terminator, 512,
574 HTTP_RESPONSE_MAX_SIZE);
578 /* The response data. */
581 /* The array of pointers that indicate where each header starts.
582 For example, given this HTTP response:
589 The headers are located like this:
591 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
593 headers[0] headers[1] headers[2] headers[3]
595 I.e. headers[0] points to the beginning of the request,
596 headers[1] points to the end of the first header and the
597 beginning of the second one, etc. */
599 const char **headers;
602 /* Create a new response object from the text of the HTTP response,
603 available in HEAD. That text is automatically split into
604 constituent header lines for fast retrieval using
607 static struct response *
608 resp_new (const char *head)
613 struct response *resp = xnew0 (struct response);
618 /* Empty head means that we're dealing with a headerless
619 (HTTP/0.9) response. In that case, don't set HEADERS at
624 /* Split HEAD into header lines, so that resp_header_* functions
625 don't need to do this over and over again. */
631 DO_REALLOC (resp->headers, size, count + 1, const char *);
632 resp->headers[count++] = hdr;
634 /* Break upon encountering an empty line. */
635 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
638 /* Find the end of HDR, including continuations. */
641 const char *end = strchr (hdr, '\n');
647 while (*hdr == ' ' || *hdr == '\t');
649 DO_REALLOC (resp->headers, size, count + 1, const char *);
650 resp->headers[count] = NULL;
655 /* Locate the header named NAME in the request data, starting with
656 position START. This allows the code to loop through the request
657 data, filtering for all requests of a given name. Returns the
658 found position, or -1 for failure. The code that uses this
659 function typically looks like this:
661 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
662 ... do something with header ...
664 If you only care about one header, use resp_header_get instead of
668 resp_header_locate (const struct response *resp, const char *name, int start,
669 const char **begptr, const char **endptr)
672 const char **headers = resp->headers;
675 if (!headers || !headers[1])
678 name_len = strlen (name);
684 for (; headers[i + 1]; i++)
686 const char *b = headers[i];
687 const char *e = headers[i + 1];
689 && b[name_len] == ':'
690 && 0 == strncasecmp (b, name, name_len))
693 while (b < e && c_isspace (*b))
695 while (b < e && c_isspace (e[-1]))
705 /* Find and retrieve the header named NAME in the request data. If
706 found, set *BEGPTR to its starting, and *ENDPTR to its ending
707 position, and return true. Otherwise return false.
709 This function is used as a building block for resp_header_copy
710 and resp_header_strdup. */
713 resp_header_get (const struct response *resp, const char *name,
714 const char **begptr, const char **endptr)
716 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
720 /* Copy the response header named NAME to buffer BUF, no longer than
721 BUFSIZE (BUFSIZE includes the terminating 0). If the header
722 exists, true is returned, false otherwise. If there should be no
723 limit on the size of the header, use resp_header_strdup instead.
725 If BUFSIZE is 0, no data is copied, but the boolean indication of
726 whether the header is present is still returned. */
729 resp_header_copy (const struct response *resp, const char *name,
730 char *buf, int bufsize)
733 if (!resp_header_get (resp, name, &b, &e))
737 int len = MIN (e - b, bufsize - 1);
738 memcpy (buf, b, len);
744 /* Return the value of header named NAME in RESP, allocated with
745 malloc. If such a header does not exist in RESP, return NULL. */
748 resp_header_strdup (const struct response *resp, const char *name)
751 if (!resp_header_get (resp, name, &b, &e))
753 return strdupdelim (b, e);
756 /* Parse the HTTP status line, which is of format:
758 HTTP-Version SP Status-Code SP Reason-Phrase
760 The function returns the status-code, or -1 if the status line
761 appears malformed. The pointer to "reason-phrase" message is
762 returned in *MESSAGE. */
765 resp_status (const struct response *resp, char **message)
772 /* For a HTTP/0.9 response, assume status 200. */
774 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
778 p = resp->headers[0];
779 end = resp->headers[1];
785 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
789 /* Match the HTTP version. This is optional because Gnutella
790 servers have been reported to not specify HTTP version. */
791 if (p < end && *p == '/')
794 while (p < end && c_isdigit (*p))
796 if (p < end && *p == '.')
798 while (p < end && c_isdigit (*p))
802 while (p < end && c_isspace (*p))
804 if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
807 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
812 while (p < end && c_isspace (*p))
814 while (p < end && c_isspace (end[-1]))
816 *message = strdupdelim (p, end);
822 /* Release the resources used by RESP. */
825 resp_free (struct response *resp)
827 xfree_null (resp->headers);
831 /* Print a single line of response, the characters [b, e). We tried
833 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
834 but that failed to escape the non-printable characters and, in fact,
835 caused crashes in UTF-8 locales. */
838 print_response_line(const char *prefix, const char *b, const char *e)
841 BOUNDED_TO_ALLOCA(b, e, copy);
842 logprintf (LOG_ALWAYS, "%s%s\n", prefix,
843 quotearg_style (escape_quoting_style, copy));
846 /* Print the server response, line by line, omitting the trailing CRLF
847 from individual header lines, and prefixed with PREFIX. */
850 print_server_response (const struct response *resp, const char *prefix)
855 for (i = 0; resp->headers[i + 1]; i++)
857 const char *b = resp->headers[i];
858 const char *e = resp->headers[i + 1];
860 if (b < e && e[-1] == '\n')
862 if (b < e && e[-1] == '\r')
864 print_response_line(prefix, b, e);
868 /* Parse the `Content-Range' header and extract the information it
869 contains. Returns true if successful, false otherwise. */
871 parse_content_range (const char *hdr, wgint *first_byte_ptr,
872 wgint *last_byte_ptr, wgint *entity_length_ptr)
876 /* Ancient versions of Netscape proxy server, presumably predating
877 rfc2068, sent out `Content-Range' without the "bytes"
879 if (0 == strncasecmp (hdr, "bytes", 5))
882 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
886 while (c_isspace (*hdr))
891 if (!c_isdigit (*hdr))
893 for (num = 0; c_isdigit (*hdr); hdr++)
894 num = 10 * num + (*hdr - '0');
895 if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
897 *first_byte_ptr = num;
899 for (num = 0; c_isdigit (*hdr); hdr++)
900 num = 10 * num + (*hdr - '0');
901 if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
903 *last_byte_ptr = num;
908 for (num = 0; c_isdigit (*hdr); hdr++)
909 num = 10 * num + (*hdr - '0');
910 *entity_length_ptr = num;
914 /* Read the body of the request, but don't store it anywhere and don't
915 display a progress gauge. This is useful for reading the bodies of
916 administrative responses to which we will soon issue another
917 request. The response is not useful to the user, but reading it
918 allows us to continue using the same connection to the server.
920 If reading fails, false is returned, true otherwise. In debug
921 mode, the body is displayed for debugging purposes. */
924 skip_short_body (int fd, wgint contlen, bool chunked)
927 SKIP_SIZE = 512, /* size of the download buffer */
928 SKIP_THRESHOLD = 4096 /* the largest size we read */
930 wgint remaining_chunk_size = 0;
931 char dlbuf[SKIP_SIZE + 1];
932 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
934 assert (contlen != -1 || contlen);
936 /* If the body is too large, it makes more sense to simply close the
937 connection than to try to read the body. */
938 if (contlen > SKIP_THRESHOLD)
941 while (contlen > 0 || chunked)
946 if (remaining_chunk_size == 0)
948 char *line = fd_read_line (fd);
953 remaining_chunk_size = strtol (line, &endl, 16);
954 if (remaining_chunk_size == 0)
961 contlen = MIN (remaining_chunk_size, SKIP_SIZE);
964 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
966 ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
969 /* Don't normally report the error since this is an
970 optimization that should be invisible to the user. */
971 DEBUGP (("] aborting (%s).\n",
972 ret < 0 ? fd_errstr (fd) : "EOF received"));
979 remaining_chunk_size -= ret;
980 if (remaining_chunk_size == 0)
981 if (fd_read_line (fd) == NULL)
985 /* Safe even if %.*s bogusly expects terminating \0 because
986 we've zero-terminated dlbuf above. */
987 DEBUGP (("%.*s", ret, dlbuf));
990 DEBUGP (("] done.\n"));
994 #define NOT_RFC2231 0
995 #define RFC2231_NOENCODING 1
996 #define RFC2231_ENCODING 2
998 /* extract_param extracts the parameter name into NAME.
999 However, if the parameter name is in RFC2231 format then
1000 this function adjusts NAME by stripping of the trailing
1001 characters that are not part of the name but are present to
1002 indicate the presence of encoding information in the value
1003 or a fragment of a long parameter value
1006 modify_param_name(param_token *name)
1008 const char *delim1 = memchr (name->b, '*', name->e - name->b);
1009 const char *delim2 = memrchr (name->b, '*', name->e - name->b);
1015 result = NOT_RFC2231;
1017 else if(delim1 == delim2)
1019 if ((name->e - 1) == delim1)
1021 result = RFC2231_ENCODING;
1025 result = RFC2231_NOENCODING;
1032 result = RFC2231_ENCODING;
1037 /* extract_param extract the paramater value into VALUE.
1038 Like modify_param_name this function modifies VALUE by
1039 stripping off the encoding information from the actual value
1042 modify_param_value (param_token *value, int encoding_type )
1044 if (RFC2231_ENCODING == encoding_type)
1046 const char *delim = memrchr (value->b, '\'', value->e - value->b);
1047 if ( delim != NULL )
1049 value->b = (delim+1);
1054 /* Extract a parameter from the string (typically an HTTP header) at
1055 **SOURCE and advance SOURCE to the next parameter. Return false
1056 when there are no more parameters to extract. The name of the
1057 parameter is returned in NAME, and the value in VALUE. If the
1058 parameter has no value, the token's value is zeroed out.
1060 For example, if *SOURCE points to the string "attachment;
1061 filename=\"foo bar\"", the first call to this function will return
1062 the token named "attachment" and no value, and the second call will
1063 return the token named "filename" and value "foo bar". The third
1064 call will return false, indicating no more valid tokens. */
1067 extract_param (const char **source, param_token *name, param_token *value,
1070 const char *p = *source;
1072 while (c_isspace (*p)) ++p;
1076 return false; /* no error; nothing more to extract */
1081 while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
1083 if (name->b == name->e)
1084 return false; /* empty name: error */
1085 while (c_isspace (*p)) ++p;
1086 if (*p == separator || !*p) /* no value */
1089 if (*p == separator) ++p;
1094 return false; /* error */
1096 /* *p is '=', extract value */
1098 while (c_isspace (*p)) ++p;
1099 if (*p == '"') /* quoted */
1102 while (*p && *p != '"') ++p;
1106 /* Currently at closing quote; find the end of param. */
1107 while (c_isspace (*p)) ++p;
1108 while (*p && *p != separator) ++p;
1109 if (*p == separator)
1112 /* garbage after closed quote, e.g. foo="bar"baz */
1118 while (*p && *p != separator) ++p;
1120 while (value->e != value->b && c_isspace (value->e[-1]))
1122 if (*p == separator) ++p;
1126 int param_type = modify_param_name(name);
1127 if (NOT_RFC2231 != param_type)
1129 modify_param_value(value, param_type);
1135 #undef RFC2231_NOENCODING
1136 #undef RFC2231_ENCODING
1138 /* Appends the string represented by VALUE to FILENAME */
1141 append_value_to_filename (char **filename, param_token const * const value)
1143 int original_length = strlen(*filename);
1144 int new_length = strlen(*filename) + (value->e - value->b);
1145 *filename = xrealloc (*filename, new_length+1);
1146 memcpy (*filename + original_length, value->b, (value->e - value->b));
1147 (*filename)[new_length] = '\0';
1151 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1153 /* Parse the contents of the `Content-Disposition' header, extracting
1154 the information useful to Wget. Content-Disposition is a header
1155 borrowed from MIME; when used in HTTP, it typically serves for
1156 specifying the desired file name of the resource. For example:
1158 Content-Disposition: attachment; filename="flora.jpg"
1160 Wget will skip the tokens it doesn't care about, such as
1161 "attachment" in the previous example; it will also skip other
1162 unrecognized params. If the header is syntactically correct and
1163 contains a file name, a copy of the file name is stored in
1164 *filename and true is returned. Otherwise, the function returns
1167 The file name is stripped of directory components and must not be
1170 Historically, this function returned filename prefixed with opt.dir_prefix,
1171 now that logic is handled by the caller, new code should pay attention,
1172 changed by crq, Sep 2010.
1176 parse_content_disposition (const char *hdr, char **filename)
1178 param_token name, value;
1180 while (extract_param (&hdr, &name, &value, ';'))
1182 int isFilename = BOUNDED_EQUAL_NO_CASE ( name.b, name.e, "filename" );
1183 if ( isFilename && value.b != NULL)
1185 /* Make the file name begin at the last slash or backslash. */
1186 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1187 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1188 if (last_slash && last_bs)
1189 value.b = 1 + MAX (last_slash, last_bs);
1190 else if (last_slash || last_bs)
1191 value.b = 1 + (last_slash ? last_slash : last_bs);
1192 if (value.b == value.e)
1196 append_value_to_filename (filename, &value);
1198 *filename = strdupdelim (value.b, value.e);
1209 /* Persistent connections. Currently, we cache the most recently used
1210 connection as persistent, provided that the HTTP server agrees to
1211 make it such. The persistence data is stored in the variables
1212 below. Ideally, it should be possible to cache an arbitrary fixed
1213 number of these connections. */
1215 /* Whether a persistent connection is active. */
1216 static bool pconn_active;
1219 /* The socket of the connection. */
1222 /* Host and port of the currently active persistent connection. */
1226 /* Whether a ssl handshake has occoured on this connection. */
1229 /* Whether the connection was authorized. This is only done by
1230 NTLM, which authorizes *connections* rather than individual
1231 requests. (That practice is peculiar for HTTP, but it is a
1232 useful optimization.) */
1236 /* NTLM data of the current connection. */
1237 struct ntlmdata ntlm;
1241 /* Mark the persistent connection as invalid and free the resources it
1242 uses. This is used by the CLOSE_* macros after they forcefully
1243 close a registered persistent connection. */
1246 invalidate_persistent (void)
1248 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1249 pconn_active = false;
1250 fd_close (pconn.socket);
1255 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1256 persistent. This will enable someone to use the same connection
1257 later. In the context of HTTP, this must be called only AFTER the
1258 response has been received and the server has promised that the
1259 connection will remain alive.
1261 If a previous connection was persistent, it is closed. */
1264 register_persistent (const char *host, int port, int fd, bool ssl)
1268 if (pconn.socket == fd)
1270 /* The connection FD is already registered. */
1275 /* The old persistent connection is still active; close it
1276 first. This situation arises whenever a persistent
1277 connection exists, but we then connect to a different
1278 host, and try to register a persistent connection to that
1280 invalidate_persistent ();
1284 pconn_active = true;
1286 pconn.host = xstrdup (host);
1289 pconn.authorized = false;
1291 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1294 /* Return true if a persistent connection is available for connecting
1298 persistent_available_p (const char *host, int port, bool ssl,
1299 bool *host_lookup_failed)
1301 /* First, check whether a persistent connection is active at all. */
1305 /* If we want SSL and the last connection wasn't or vice versa,
1306 don't use it. Checking for host and port is not enough because
1307 HTTP and HTTPS can apparently coexist on the same port. */
1308 if (ssl != pconn.ssl)
1311 /* If we're not connecting to the same port, we're not interested. */
1312 if (port != pconn.port)
1315 /* If the host is the same, we're in business. If not, there is
1316 still hope -- read below. */
1317 if (0 != strcasecmp (host, pconn.host))
1319 /* Check if pconn.socket is talking to HOST under another name.
1320 This happens often when both sites are virtual hosts
1321 distinguished only by name and served by the same network
1322 interface, and hence the same web server (possibly set up by
1323 the ISP and serving many different web sites). This
1324 admittedly unconventional optimization does not contradict
1325 HTTP and works well with popular server software. */
1329 struct address_list *al;
1332 /* Don't try to talk to two different SSL sites over the same
1333 secure connection! (Besides, it's not clear that
1334 name-based virtual hosting is even possible with SSL.) */
1337 /* If pconn.socket's peer is one of the IP addresses HOST
1338 resolves to, pconn.socket is for all intents and purposes
1339 already talking to HOST. */
1341 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1343 /* Can't get the peer's address -- something must be very
1344 wrong with the connection. */
1345 invalidate_persistent ();
1348 al = lookup_host (host, 0);
1351 *host_lookup_failed = true;
1355 found = address_list_contains (al, &ip);
1356 address_list_release (al);
1361 /* The persistent connection's peer address was found among the
1362 addresses HOST resolved to; therefore, pconn.sock is in fact
1363 already talking to HOST -- no need to reconnect. */
1366 /* Finally, check whether the connection is still open. This is
1367 important because most servers implement liberal (short) timeout
1368 on persistent connections. Wget can of course always reconnect
1369 if the connection doesn't work out, but it's nicer to know in
1370 advance. This test is a logical followup of the first test, but
1371 is "expensive" and therefore placed at the end of the list.
1373 (Current implementation of test_socket_open has a nice side
1374 effect that it treats sockets with pending data as "closed".
1375 This is exactly what we want: if a broken server sends message
1376 body in response to HEAD, or if it sends more than conent-length
1377 data, we won't reuse the corrupted connection.) */
1379 if (!test_socket_open (pconn.socket))
1381 /* Oops, the socket is no longer open. Now that we know that,
1382 let's invalidate the persistent connection before returning
1384 invalidate_persistent ();
1391 /* The idea behind these two CLOSE macros is to distinguish between
1392 two cases: one when the job we've been doing is finished, and we
1393 want to close the connection and leave, and two when something is
1394 seriously wrong and we're closing the connection as part of
1397 In case of keep_alive, CLOSE_FINISH should leave the connection
1398 open, while CLOSE_INVALIDATE should still close it.
1400 Note that the semantics of the flag `keep_alive' is "this
1401 connection *will* be reused (the server has promised not to close
1402 the connection once we're done)", while the semantics of
1403 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1404 active, registered connection". */
1406 #define CLOSE_FINISH(fd) do { \
1409 if (pconn_active && (fd) == pconn.socket) \
1410 invalidate_persistent (); \
1419 #define CLOSE_INVALIDATE(fd) do { \
1420 if (pconn_active && (fd) == pconn.socket) \
1421 invalidate_persistent (); \
1429 wgint len; /* received length */
1430 wgint contlen; /* expected length */
1431 wgint restval; /* the restart value */
1432 int res; /* the result of last read */
1433 char *rderrmsg; /* error message from read error */
1434 char *newloc; /* new location (redirection) */
1435 char *remote_time; /* remote time-stamp string */
1436 char *error; /* textual HTTP error */
1437 int statcode; /* status code */
1438 char *message; /* status message */
1439 wgint rd_size; /* amount of data read from socket */
1440 double dltime; /* time it took to download the data */
1441 const char *referer; /* value of the referer header. */
1442 char *local_file; /* local file name. */
1443 bool existence_checked; /* true if we already checked for a file's
1444 existence after having begun to download
1445 (needed in gethttp for when connection is
1446 interrupted/restarted. */
1447 bool timestamp_checked; /* true if pre-download time-stamping checks
1448 * have already been performed */
1449 char *orig_file_name; /* name of file to compare for time-stamping
1450 * (might be != local_file if -K is set) */
1451 wgint orig_file_size; /* size of file to compare for time-stamping */
1452 time_t orig_file_tstamp; /* time-stamp of file to compare for
1457 free_hstat (struct http_stat *hs)
1459 xfree_null (hs->newloc);
1460 xfree_null (hs->remote_time);
1461 xfree_null (hs->error);
1462 xfree_null (hs->rderrmsg);
1463 xfree_null (hs->local_file);
1464 xfree_null (hs->orig_file_name);
1465 xfree_null (hs->message);
1467 /* Guard against being called twice. */
1469 hs->remote_time = NULL;
1474 get_file_flags (const char *filename, int *dt)
1476 logprintf (LOG_VERBOSE, _("\
1477 File %s already there; not retrieving.\n\n"), quote (filename));
1478 /* If the file is there, we suppose it's retrieved OK. */
1481 /* #### Bogusness alert. */
1482 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1483 if (has_html_suffix_p (filename))
1487 /* Download the response body from the socket and writes it to
1488 an output file. The headers have already been read from the
1489 socket. If WARC is enabled, the response body will also be
1490 written to a WARC response record.
1492 hs, contlen, contrange, chunked_transfer_encoding and url are
1493 parameters from the gethttp method. fp is a pointer to the
1496 url, warc_timestamp_str, warc_request_uuid, warc_ip, type
1497 and statcode will be saved in the headers of the WARC record.
1498 The head parameter contains the HTTP headers of the response.
1500 If fp is NULL and WARC is enabled, the response body will be
1501 written only to the WARC file. If WARC is disabled and fp
1502 is a file pointer, the data will be written to the file.
1503 If fp is a file pointer and WARC is enabled, the body will
1504 be written to both destinations.
1506 Returns the error code. */
1508 read_response_body (struct http_stat *hs, int sock, FILE *fp, wgint contlen,
1509 wgint contrange, bool chunked_transfer_encoding,
1510 char *url, char *warc_timestamp_str, char *warc_request_uuid,
1511 ip_address *warc_ip, char *type, int statcode, char *head)
1513 int warc_payload_offset = 0;
1514 FILE *warc_tmp = NULL;
1517 if (opt.warc_filename != NULL)
1519 /* Open a temporary file where we can write the response before we
1520 add it to the WARC record. */
1521 warc_tmp = warc_tempfile ();
1522 if (warc_tmp == NULL)
1523 warcerr = WARC_TMP_FOPENERR;
1527 /* We should keep the response headers for the WARC record. */
1528 int head_len = strlen (head);
1529 int warc_tmp_written = fwrite (head, 1, head_len, warc_tmp);
1530 if (warc_tmp_written != head_len)
1531 warcerr = WARC_TMP_FWRITEERR;
1532 warc_payload_offset = head_len;
1537 if (warc_tmp != NULL)
1545 /* This confuses the timestamping code that checks for file size.
1546 #### The timestamping code should be smarter about file size. */
1547 if (opt.save_headers && hs->restval == 0)
1548 fwrite (head, 1, strlen (head), fp);
1551 /* Read the response body. */
1554 /* If content-length is present, read that much; otherwise, read
1555 until EOF. The HTTP spec doesn't require the server to
1556 actually close the connection when it's done sending data. */
1557 flags |= rb_read_exactly;
1558 if (fp != NULL && hs->restval > 0 && contrange == 0)
1559 /* If the server ignored our range request, instruct fd_read_body
1560 to skip the first RESTVAL bytes of body. */
1561 flags |= rb_skip_startpos;
1562 if (chunked_transfer_encoding)
1563 flags |= rb_chunked_transfer_encoding;
1565 hs->len = hs->restval;
1567 /* Download the response body and write it to fp.
1568 If we are working on a WARC file, we simultaneously write the
1569 response body to warc_tmp. */
1570 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
1571 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
1575 if (warc_tmp != NULL)
1577 /* Create a response record and write it to the WARC file.
1578 Note: per the WARC standard, the request and response should share
1579 the same date header. We re-use the timestamp of the request.
1580 The response record should also refer to the uuid of the request. */
1581 bool r = warc_write_response_record (url, warc_timestamp_str,
1582 warc_request_uuid, warc_ip,
1583 warc_tmp, warc_payload_offset,
1584 type, statcode, hs->newloc);
1586 /* warc_write_response_record has closed warc_tmp. */
1592 return RETRFINISHED;
1595 if (warc_tmp != NULL)
1600 /* Error while writing to fd. */
1603 else if (hs->res == -3)
1605 /* Error while writing to warc_tmp. */
1606 return WARC_TMP_FWRITEERR;
1611 hs->rderrmsg = xstrdup (fd_errstr (sock));
1612 return RETRFINISHED;
1616 #define BEGINS_WITH(line, string_constant) \
1617 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1618 && (c_isspace (line[sizeof (string_constant) - 1]) \
1619 || !line[sizeof (string_constant) - 1]))
1622 #define SET_USER_AGENT(req) do { \
1623 if (!opt.useragent) \
1624 request_set_header (req, "User-Agent", \
1625 aprintf ("Wget/%s (VMS %s %s)", \
1626 version_string, vms_arch(), vms_vers()), \
1628 else if (*opt.useragent) \
1629 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1631 #else /* def __VMS */
1632 #define SET_USER_AGENT(req) do { \
1633 if (!opt.useragent) \
1634 request_set_header (req, "User-Agent", \
1635 aprintf ("Wget/%s (%s)", \
1636 version_string, OS_TYPE), \
1638 else if (*opt.useragent) \
1639 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1641 #endif /* def __VMS [else] */
1643 /* The flags that allow clobbering the file (opening with "wb").
1644 Defined here to avoid repetition later. #### This will require
1646 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1647 || opt.dirstruct || opt.output_document)
1649 /* Retrieve a document through HTTP protocol. It recognizes status
1650 code, and correctly handles redirections. It closes the network
1651 socket. If it receives an error from the functions below it, it
1652 will print it if there is enough information to do so (almost
1653 always), returning the error to the caller (i.e. http_loop).
1655 Various HTTP parameters are stored to hs.
1657 If PROXY is non-NULL, the connection will be made to the proxy
1658 server, and u->url will be requested. */
1660 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
1661 struct iri *iri, int count)
1663 struct request *req;
1666 char *user, *passwd;
1670 wgint contlen, contrange;
1677 /* Set to 1 when the authorization has already been sent and should
1678 not be tried again. */
1679 bool auth_finished = false;
1681 /* Set to 1 when just globally-set Basic authorization has been sent;
1682 * should prevent further Basic negotiations, but not other
1684 bool basic_auth_finished = false;
1686 /* Whether NTLM authentication is used for this request. */
1687 bool ntlm_seen = false;
1689 /* Whether our connection to the remote host is through SSL. */
1690 bool using_ssl = false;
1692 /* Whether a HEAD request will be issued (as opposed to GET or
1694 bool head_only = !!(*dt & HEAD_ONLY);
1697 struct response *resp;
1701 /* Declare WARC variables. */
1702 bool warc_enabled = (opt.warc_filename != NULL);
1703 FILE *warc_tmp = NULL;
1704 char warc_timestamp_str [21];
1705 char warc_request_uuid [48];
1706 ip_address *warc_ip = NULL;
1707 long int warc_payload_offset = -1;
1709 /* Whether this connection will be kept alive after the HTTP request
1713 /* Is the server using the chunked transfer encoding? */
1714 bool chunked_transfer_encoding = false;
1716 /* Whether keep-alive should be inhibited. */
1717 bool inhibit_keep_alive =
1718 !opt.http_keep_alive || opt.ignore_length;
1720 /* Headers sent when using POST. */
1721 wgint post_data_size = 0;
1723 bool host_lookup_failed = false;
1726 if (u->scheme == SCHEME_HTTPS)
1728 /* Initialize the SSL context. After this has once been done,
1729 it becomes a no-op. */
1732 scheme_disable (SCHEME_HTTPS);
1733 logprintf (LOG_NOTQUIET,
1734 _("Disabling SSL due to encountered errors.\n"));
1735 return SSLINITFAILED;
1738 #endif /* HAVE_SSL */
1740 /* Initialize certain elements of struct http_stat. */
1744 hs->rderrmsg = NULL;
1746 hs->remote_time = NULL;
1752 /* Prepare the request to send. */
1754 req = request_new ();
1757 const char *meth = "GET";
1760 else if (opt.post_file_name || opt.post_data)
1762 /* Use the full path, i.e. one that includes the leading slash and
1763 the query string. E.g. if u->path is "foo/bar" and u->query is
1764 "param=value", full_path will be "/foo/bar?param=value". */
1767 /* When using SSL over proxy, CONNECT establishes a direct
1768 connection to the HTTPS server. Therefore use the same
1769 argument as when talking to the server directly. */
1770 && u->scheme != SCHEME_HTTPS
1773 meth_arg = xstrdup (u->url);
1775 meth_arg = url_full_path (u);
1776 request_set_method (req, meth, meth_arg);
1779 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1780 if (*dt & SEND_NOCACHE)
1782 /* Cache-Control MUST be obeyed by all HTTP/1.1 caching mechanisms... */
1783 request_set_header (req, "Cache-Control", "no-cache, must-revalidate", rel_none);
1785 /* ... but some HTTP/1.0 caches doesn't implement Cache-Control. */
1786 request_set_header (req, "Pragma", "no-cache", rel_none);
1789 request_set_header (req, "Range",
1790 aprintf ("bytes=%s-",
1791 number_to_static_string (hs->restval)),
1793 SET_USER_AGENT (req);
1794 request_set_header (req, "Accept", "*/*", rel_none);
1796 /* Find the username and password for authentication. */
1799 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1800 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1801 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1803 /* We only do "site-wide" authentication with "global" user/password
1804 * values unless --auth-no-challange has been requested; URL user/password
1805 * info overrides. */
1806 if (user && passwd && (!u->user || opt.auth_without_challenge))
1808 /* If this is a host for which we've already received a Basic
1809 * challenge, we'll go ahead and send Basic authentication creds. */
1810 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1813 /* Generate the Host header, HOST:PORT. Take into account that:
1815 - Broken server-side software often doesn't recognize the PORT
1816 argument, so we must generate "Host: www.server.com" instead of
1817 "Host: www.server.com:80" (and likewise for https port).
1819 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1820 becomes ambiguous and needs to be rewritten as "Host:
1821 [3ffe:8100:200:2::2]:1234". */
1823 /* Formats arranged for hfmt[add_port][add_squares]. */
1824 static const char *hfmt[][2] = {
1825 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1827 int add_port = u->port != scheme_default_port (u->scheme);
1828 int add_squares = strchr (u->host, ':') != NULL;
1829 request_set_header (req, "Host",
1830 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1834 if (inhibit_keep_alive)
1835 request_set_header (req, "Connection", "Close", rel_none);
1839 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1842 request_set_header (req, "Connection", "Close", rel_none);
1843 request_set_header (req, "Proxy-Connection", "Keep-Alive", rel_none);
1847 if (opt.post_data || opt.post_file_name)
1849 request_set_header (req, "Content-Type",
1850 "application/x-www-form-urlencoded", rel_none);
1852 post_data_size = strlen (opt.post_data);
1855 post_data_size = file_size (opt.post_file_name);
1856 if (post_data_size == -1)
1858 logprintf (LOG_NOTQUIET, _("POST data file %s missing: %s\n"),
1859 quote (opt.post_file_name), strerror (errno));
1863 request_set_header (req, "Content-Length",
1864 xstrdup (number_to_static_string (post_data_size)),
1869 /* We need to come back here when the initial attempt to retrieve
1870 without authorization header fails. (Expected to happen at least
1871 for the Digest authorization scheme.) */
1874 request_set_header (req, "Cookie",
1875 cookie_header (wget_cookie_jar,
1876 u->host, u->port, u->path,
1878 u->scheme == SCHEME_HTTPS
1885 /* Add the user headers. */
1886 if (opt.user_headers)
1889 for (i = 0; opt.user_headers[i]; i++)
1890 request_set_user_header (req, opt.user_headers[i]);
1896 char *proxy_user, *proxy_passwd;
1897 /* For normal username and password, URL components override
1898 command-line/wgetrc parameters. With proxy
1899 authentication, it's the reverse, because proxy URLs are
1900 normally the "permanent" ones, so command-line args
1901 should take precedence. */
1902 if (opt.proxy_user && opt.proxy_passwd)
1904 proxy_user = opt.proxy_user;
1905 proxy_passwd = opt.proxy_passwd;
1909 proxy_user = proxy->user;
1910 proxy_passwd = proxy->passwd;
1912 /* #### This does not appear right. Can't the proxy request,
1913 say, `Digest' authentication? */
1914 if (proxy_user && proxy_passwd)
1915 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1917 /* If we're using a proxy, we will be connecting to the proxy
1921 /* Proxy authorization over SSL is handled below. */
1923 if (u->scheme != SCHEME_HTTPS)
1925 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1930 /* Establish the connection. */
1932 if (inhibit_keep_alive)
1936 /* Look for a persistent connection to target host, unless a
1937 proxy is used. The exception is when SSL is in use, in which
1938 case the proxy is nothing but a passthrough to the target
1939 host, registered as a connection to the latter. */
1940 struct url *relevant = conn;
1942 if (u->scheme == SCHEME_HTTPS)
1946 if (persistent_available_p (relevant->host, relevant->port,
1948 relevant->scheme == SCHEME_HTTPS,
1952 &host_lookup_failed))
1954 int family = socket_family (pconn.socket, ENDPOINT_PEER);
1955 sock = pconn.socket;
1956 using_ssl = pconn.ssl;
1957 if (family == AF_INET6)
1958 logprintf (LOG_VERBOSE, _("Reusing existing connection to [%s]:%d.\n"),
1959 quotearg_style (escape_quoting_style, pconn.host),
1962 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1963 quotearg_style (escape_quoting_style, pconn.host),
1965 DEBUGP (("Reusing fd %d.\n", sock));
1966 if (pconn.authorized)
1967 /* If the connection is already authorized, the "Basic"
1968 authorization added by code above is unnecessary and
1970 request_remove_header (req, "Authorization");
1972 else if (host_lookup_failed)
1975 logprintf(LOG_NOTQUIET,
1976 _("%s: unable to resolve host address %s\n"),
1977 exec_name, quote (relevant->host));
1984 sock = connect_to_host (conn->host, conn->port);
1993 return (retryable_socket_connect_error (errno)
1994 ? CONERROR : CONIMPOSSIBLE);
1998 if (proxy && u->scheme == SCHEME_HTTPS)
2000 /* When requesting SSL URLs through proxies, use the
2001 CONNECT method to request passthrough. */
2002 struct request *connreq = request_new ();
2003 request_set_method (connreq, "CONNECT",
2004 aprintf ("%s:%d", u->host, u->port));
2005 SET_USER_AGENT (connreq);
2008 request_set_header (connreq, "Proxy-Authorization",
2009 proxyauth, rel_value);
2010 /* Now that PROXYAUTH is part of the CONNECT request,
2011 zero it out so we don't send proxy authorization with
2012 the regular request below. */
2015 /* Examples in rfc2817 use the Host header in CONNECT
2016 requests. I don't see how that gains anything, given
2017 that the contents of Host would be exactly the same as
2018 the contents of CONNECT. */
2020 write_error = request_send (connreq, sock, 0);
2021 request_free (connreq);
2022 if (write_error < 0)
2024 CLOSE_INVALIDATE (sock);
2028 head = read_http_response_head (sock);
2031 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
2033 CLOSE_INVALIDATE (sock);
2042 DEBUGP (("proxy responded with: [%s]\n", head));
2044 resp = resp_new (head);
2045 statcode = resp_status (resp, &message);
2048 char *tms = datetime_str (time (NULL));
2049 logprintf (LOG_VERBOSE, "%d\n", statcode);
2050 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
2051 quotearg_style (escape_quoting_style,
2052 _("Malformed status line")));
2056 hs->message = xstrdup (message);
2059 if (statcode != 200)
2062 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
2063 message ? quotearg_style (escape_quoting_style, message) : "?");
2064 xfree_null (message);
2067 xfree_null (message);
2069 /* SOCK is now *really* connected to u->host, so update CONN
2070 to reflect this. That way register_persistent will
2071 register SOCK as being connected to u->host:u->port. */
2075 if (conn->scheme == SCHEME_HTTPS)
2077 if (!ssl_connect_wget (sock))
2082 else if (!ssl_check_certificate (sock, u->host))
2085 return VERIFCERTERR;
2089 #endif /* HAVE_SSL */
2092 /* Open the temporary file where we will write the request. */
2095 warc_tmp = warc_tempfile ();
2096 if (warc_tmp == NULL)
2098 CLOSE_INVALIDATE (sock);
2100 return WARC_TMP_FOPENERR;
2105 warc_ip = (ip_address *) alloca (sizeof (ip_address));
2106 socket_ip_address (sock, warc_ip, ENDPOINT_PEER);
2110 /* Send the request to server. */
2111 write_error = request_send (req, sock, warc_tmp);
2113 if (write_error >= 0)
2117 DEBUGP (("[POST data: %s]\n", opt.post_data));
2118 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
2119 if (write_error >= 0 && warc_tmp != NULL)
2121 /* Remember end of headers / start of payload. */
2122 warc_payload_offset = ftell (warc_tmp);
2124 /* Write a copy of the data to the WARC record. */
2125 int warc_tmp_written = fwrite (opt.post_data, 1, post_data_size, warc_tmp);
2126 if (warc_tmp_written != post_data_size)
2130 else if (opt.post_file_name && post_data_size != 0)
2132 if (warc_tmp != NULL)
2133 /* Remember end of headers / start of payload. */
2134 warc_payload_offset = ftell (warc_tmp);
2136 write_error = post_file (sock, opt.post_file_name, post_data_size, warc_tmp);
2140 if (write_error < 0)
2142 CLOSE_INVALIDATE (sock);
2145 if (warc_tmp != NULL)
2148 if (write_error == -2)
2149 return WARC_TMP_FWRITEERR;
2153 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
2154 proxy ? "Proxy" : "HTTP");
2163 /* Generate a timestamp and uuid for this request. */
2164 warc_timestamp (warc_timestamp_str);
2165 warc_uuid_str (warc_request_uuid);
2167 /* Create a request record and store it in the WARC file. */
2168 warc_result = warc_write_request_record (u->url, warc_timestamp_str,
2169 warc_request_uuid, warc_ip,
2170 warc_tmp, warc_payload_offset);
2173 CLOSE_INVALIDATE (sock);
2178 /* warc_write_request_record has also closed warc_tmp. */
2183 head = read_http_response_head (sock);
2188 logputs (LOG_NOTQUIET, _("No data received.\n"));
2189 CLOSE_INVALIDATE (sock);
2195 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
2197 CLOSE_INVALIDATE (sock);
2202 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
2204 resp = resp_new (head);
2206 /* Check for status line. */
2208 statcode = resp_status (resp, &message);
2211 char *tms = datetime_str (time (NULL));
2212 logprintf (LOG_VERBOSE, "%d\n", statcode);
2213 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
2214 quotearg_style (escape_quoting_style,
2215 _("Malformed status line")));
2216 CLOSE_INVALIDATE (sock);
2222 if (H_10X (statcode))
2224 DEBUGP (("Ignoring response\n"));
2229 hs->message = xstrdup (message);
2230 if (!opt.server_response)
2231 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
2232 message ? quotearg_style (escape_quoting_style, message) : "");
2235 logprintf (LOG_VERBOSE, "\n");
2236 print_server_response (resp, " ");
2239 if (!opt.ignore_length
2240 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
2244 parsed = str_to_wgint (hdrval, NULL, 10);
2245 if (parsed == WGINT_MAX && errno == ERANGE)
2248 #### If Content-Length is out of range, it most likely
2249 means that the file is larger than 2G and that we're
2250 compiled without LFS. In that case we should probably
2251 refuse to even attempt to download the file. */
2254 else if (parsed < 0)
2256 /* Negative Content-Length; nonsensical, so we can't
2257 assume any information about the content to receive. */
2264 /* Check for keep-alive related responses. */
2265 if (!inhibit_keep_alive && contlen != -1)
2267 if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
2269 if (0 == strcasecmp (hdrval, "Close"))
2274 chunked_transfer_encoding = false;
2275 if (resp_header_copy (resp, "Transfer-Encoding", hdrval, sizeof (hdrval))
2276 && 0 == strcasecmp (hdrval, "chunked"))
2277 chunked_transfer_encoding = true;
2279 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2283 const char *scbeg, *scend;
2284 /* The jar should have been created by now. */
2285 assert (wget_cookie_jar != NULL);
2287 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2288 &scbeg, &scend)) != -1;
2291 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2292 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2293 u->path, set_cookie);
2298 /* The server has promised that it will not close the connection
2299 when we're done. This means that we can register it. */
2300 register_persistent (conn->host, conn->port, sock, using_ssl);
2302 if (statcode == HTTP_STATUS_UNAUTHORIZED)
2304 /* Authorization is required. */
2306 /* Normally we are not interested in the response body.
2307 But if we are writing a WARC file we are: we like to keep everyting. */
2311 type = resp_header_strdup (resp, "Content-Type");
2312 err = read_response_body (hs, sock, NULL, contlen, 0,
2313 chunked_transfer_encoding,
2314 u->url, warc_timestamp_str,
2315 warc_request_uuid, warc_ip, type,
2319 if (err != RETRFINISHED || hs->res < 0)
2321 CLOSE_INVALIDATE (sock);
2323 xfree_null (message);
2329 CLOSE_FINISH (sock);
2333 /* Since WARC is disabled, we are not interested in the response body. */
2334 if (keep_alive && !head_only
2335 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2336 CLOSE_FINISH (sock);
2338 CLOSE_INVALIDATE (sock);
2341 pconn.authorized = false;
2342 if (!auth_finished && (user && passwd))
2344 /* IIS sends multiple copies of WWW-Authenticate, one with
2345 the value "negotiate", and other(s) with data. Loop over
2346 all the occurrences and pick the one we recognize. */
2348 const char *wabeg, *waend;
2349 char *www_authenticate = NULL;
2351 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
2352 &wabeg, &waend)) != -1;
2354 if (known_authentication_scheme_p (wabeg, waend))
2356 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
2360 if (!www_authenticate)
2362 /* If the authentication header is missing or
2363 unrecognized, there's no sense in retrying. */
2364 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
2366 else if (!basic_auth_finished
2367 || !BEGINS_WITH (www_authenticate, "Basic"))
2370 pth = url_full_path (u);
2371 request_set_header (req, "Authorization",
2372 create_authorization_line (www_authenticate,
2374 request_method (req),
2378 if (BEGINS_WITH (www_authenticate, "NTLM"))
2380 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
2382 /* Need to register this host as using basic auth,
2383 * so we automatically send creds next time. */
2384 register_basic_auth_host (u->host);
2387 xfree_null (message);
2390 goto retry_with_auth;
2394 /* We already did Basic auth, and it failed. Gotta
2398 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
2400 xfree_null (message);
2405 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2407 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2409 pconn.authorized = true;
2412 /* Determine the local filename if needed. Notice that if -O is used
2413 * hstat.local_file is set by http_loop to the argument of -O. */
2414 if (!hs->local_file)
2416 char *local_file = NULL;
2418 /* Honor Content-Disposition whether possible. */
2419 if (!opt.content_disposition
2420 || !resp_header_copy (resp, "Content-Disposition",
2421 hdrval, sizeof (hdrval))
2422 || !parse_content_disposition (hdrval, &local_file))
2424 /* The Content-Disposition header is missing or broken.
2425 * Choose unique file name according to given URL. */
2426 hs->local_file = url_file_name (u, NULL);
2430 DEBUGP (("Parsed filename from Content-Disposition: %s\n",
2432 hs->local_file = url_file_name (u, local_file);
2436 /* TODO: perform this check only once. */
2437 if (!hs->existence_checked && file_exists_p (hs->local_file))
2439 if (opt.noclobber && !opt.output_document)
2441 /* If opt.noclobber is turned on and file already exists, do not
2442 retrieve the file. But if the output_document was given, then this
2443 test was already done and the file didn't exist. Hence the !opt.output_document */
2444 get_file_flags (hs->local_file, dt);
2446 xfree_null (message);
2447 return RETRUNNEEDED;
2449 else if (!ALLOW_CLOBBER)
2451 char *unique = unique_name (hs->local_file, true);
2452 if (unique != hs->local_file)
2453 xfree (hs->local_file);
2454 hs->local_file = unique;
2457 hs->existence_checked = true;
2459 /* Support timestamping */
2460 /* TODO: move this code out of gethttp. */
2461 if (opt.timestamping && !hs->timestamp_checked)
2463 size_t filename_len = strlen (hs->local_file);
2464 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (ORIG_SFX));
2465 bool local_dot_orig_file_exists = false;
2466 char *local_filename = NULL;
2469 if (opt.backup_converted)
2470 /* If -K is specified, we'll act on the assumption that it was specified
2471 last time these files were downloaded as well, and instead of just
2472 comparing local file X against server file X, we'll compare local
2473 file X.orig (if extant, else X) against server file X. If -K
2474 _wasn't_ specified last time, or the server contains files called
2475 *.orig, -N will be back to not operating correctly with -k. */
2477 /* Would a single s[n]printf() call be faster? --dan
2479 Definitely not. sprintf() is horribly slow. It's a
2480 different question whether the difference between the two
2481 affects a program. Usually I'd say "no", but at one
2482 point I profiled Wget, and found that a measurable and
2483 non-negligible amount of time was lost calling sprintf()
2484 in url.c. Replacing sprintf with inline calls to
2485 strcpy() and number_to_string() made a difference.
2487 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
2488 memcpy (filename_plus_orig_suffix + filename_len,
2489 ORIG_SFX, sizeof (ORIG_SFX));
2491 /* Try to stat() the .orig file. */
2492 if (stat (filename_plus_orig_suffix, &st) == 0)
2494 local_dot_orig_file_exists = true;
2495 local_filename = filename_plus_orig_suffix;
2499 if (!local_dot_orig_file_exists)
2500 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
2501 if (stat (hs->local_file, &st) == 0)
2502 local_filename = hs->local_file;
2504 if (local_filename != NULL)
2505 /* There was a local file, so we'll check later to see if the version
2506 the server has is the same version we already have, allowing us to
2509 hs->orig_file_name = xstrdup (local_filename);
2510 hs->orig_file_size = st.st_size;
2511 hs->orig_file_tstamp = st.st_mtime;
2513 /* Modification time granularity is 2 seconds for Windows, so
2514 increase local time by 1 second for later comparison. */
2515 ++hs->orig_file_tstamp;
2522 hs->statcode = statcode;
2524 hs->error = xstrdup (_("Malformed status line"));
2526 hs->error = xstrdup (_("(no description)"));
2528 hs->error = xstrdup (message);
2529 xfree_null (message);
2531 type = resp_header_strdup (resp, "Content-Type");
2534 char *tmp = strchr (type, ';');
2537 /* sXXXav: only needed if IRI support is enabled */
2538 char *tmp2 = tmp + 1;
2540 while (tmp > type && c_isspace (tmp[-1]))
2544 /* Try to get remote encoding if needed */
2545 if (opt.enable_iri && !opt.encoding_remote)
2547 tmp = parse_charset (tmp2);
2549 set_content_encoding (iri, tmp);
2553 hs->newloc = resp_header_strdup (resp, "Location");
2554 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2556 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2558 wgint first_byte_pos, last_byte_pos, entity_length;
2559 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2562 contrange = first_byte_pos;
2563 contlen = last_byte_pos - first_byte_pos + 1;
2568 /* 20x responses are counted among successful by default. */
2569 if (H_20X (statcode))
2572 /* Return if redirected. */
2573 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2575 /* RFC2068 says that in case of the 300 (multiple choices)
2576 response, the server can output a preferred URL through
2577 `Location' header; otherwise, the request should be treated
2578 like GET. So, if the location is set, it will be a
2579 redirection; otherwise, just proceed normally. */
2580 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2584 logprintf (LOG_VERBOSE,
2585 _("Location: %s%s\n"),
2586 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2587 hs->newloc ? _(" [following]") : "");
2589 /* In case the caller cares to look... */
2594 /* Normally we are not interested in the response body of a redirect.
2595 But if we are writing a WARC file we are: we like to keep everyting. */
2598 int err = read_response_body (hs, sock, NULL, contlen, 0,
2599 chunked_transfer_encoding,
2600 u->url, warc_timestamp_str,
2601 warc_request_uuid, warc_ip, type,
2604 if (err != RETRFINISHED || hs->res < 0)
2606 CLOSE_INVALIDATE (sock);
2612 CLOSE_FINISH (sock);
2616 /* Since WARC is disabled, we are not interested in the response body. */
2617 if (keep_alive && !head_only
2618 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2619 CLOSE_FINISH (sock);
2621 CLOSE_INVALIDATE (sock);
2626 /* From RFC2616: The status codes 303 and 307 have
2627 been added for servers that wish to make unambiguously
2628 clear which kind of reaction is expected of the client.
2630 A 307 should be redirected using the same method,
2631 in other words, a POST should be preserved and not
2632 converted to a GET in that case. */
2633 if (statcode == HTTP_STATUS_TEMPORARY_REDIRECT)
2634 return NEWLOCATION_KEEP_POST;
2639 /* If content-type is not given, assume text/html. This is because
2640 of the multitude of broken CGI's that "forget" to generate the
2643 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2644 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2650 0 == strncasecmp (type, TEXTCSS_S, strlen (TEXTCSS_S)))
2655 if (opt.adjust_extension)
2658 /* -E / --adjust-extension / adjust_extension = on was specified,
2659 and this is a text/html file. If some case-insensitive
2660 variation on ".htm[l]" isn't already the file's suffix,
2663 ensure_extension (hs, ".html", dt);
2665 else if (*dt & TEXTCSS)
2667 ensure_extension (hs, ".css", dt);
2671 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
2672 || (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
2673 && contrange == 0 && contlen >= 0 && hs->restval >= contlen))
2675 /* If `-c' is in use and the file has been fully downloaded (or
2676 the remote file has shrunk), Wget effectively requests bytes
2677 after the end of file and the server response with 416
2678 (or 200 with a <= Content-Length. */
2679 logputs (LOG_VERBOSE, _("\
2680 \n The file is already fully retrieved; nothing to do.\n\n"));
2681 /* In case the caller inspects. */
2684 /* Mark as successfully retrieved. */
2687 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2688 might be more bytes in the body. */
2690 return RETRUNNEEDED;
2692 if ((contrange != 0 && contrange != hs->restval)
2693 || (H_PARTIAL (statcode) && !contrange))
2695 /* The Range request was somehow misunderstood by the server.
2698 CLOSE_INVALIDATE (sock);
2705 hs->contlen = contlen + contrange;
2711 /* No need to print this output if the body won't be
2712 downloaded at all, or if the original server response is
2714 logputs (LOG_VERBOSE, _("Length: "));
2717 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2718 if (contlen + contrange >= 1024)
2719 logprintf (LOG_VERBOSE, " (%s)",
2720 human_readable (contlen + contrange));
2723 if (contlen >= 1024)
2724 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2725 number_to_static_string (contlen),
2726 human_readable (contlen));
2728 logprintf (LOG_VERBOSE, _(", %s remaining"),
2729 number_to_static_string (contlen));
2733 logputs (LOG_VERBOSE,
2734 opt.ignore_length ? _("ignored") : _("unspecified"));
2736 logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
2738 logputs (LOG_VERBOSE, "\n");
2742 /* Return if we have no intention of further downloading. */
2743 if ((!(*dt & RETROKF) && !opt.content_on_error) || head_only)
2745 /* In case the caller cares to look... */
2750 /* Normally we are not interested in the response body of a error responses.
2751 But if we are writing a WARC file we are: we like to keep everyting. */
2754 int err = read_response_body (hs, sock, NULL, contlen, 0,
2755 chunked_transfer_encoding,
2756 u->url, warc_timestamp_str,
2757 warc_request_uuid, warc_ip, type,
2760 if (err != RETRFINISHED || hs->res < 0)
2762 CLOSE_INVALIDATE (sock);
2768 CLOSE_FINISH (sock);
2772 /* Since WARC is disabled, we are not interested in the response body. */
2774 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2775 servers not to send body in response to a HEAD request, and
2776 those that do will likely be caught by test_socket_open.
2777 If not, they can be worked around using
2778 `--no-http-keep-alive'. */
2779 CLOSE_FINISH (sock);
2781 && skip_short_body (sock, contlen, chunked_transfer_encoding))
2782 /* Successfully skipped the body; also keep using the socket. */
2783 CLOSE_FINISH (sock);
2785 CLOSE_INVALIDATE (sock);
2790 return RETRFINISHED;
2794 For VMS, define common fopen() optional arguments.
2797 # define FOPEN_OPT_ARGS "fop=sqo", "acc", acc_cb, &open_id
2798 # define FOPEN_BIN_FLAG 3
2799 #else /* def __VMS */
2800 # define FOPEN_BIN_FLAG true
2801 #endif /* def __VMS [else] */
2803 /* Open the local file. */
2806 mkalldirs (hs->local_file);
2808 rotate_backups (hs->local_file);
2815 fp = fopen (hs->local_file, "ab", FOPEN_OPT_ARGS);
2816 #else /* def __VMS */
2817 fp = fopen (hs->local_file, "ab");
2818 #endif /* def __VMS [else] */
2820 else if (ALLOW_CLOBBER || count > 0)
2822 if (opt.unlink && file_exists_p (hs->local_file))
2824 int res = unlink (hs->local_file);
2827 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file,
2829 CLOSE_INVALIDATE (sock);
2840 fp = fopen (hs->local_file, "wb", FOPEN_OPT_ARGS);
2841 #else /* def __VMS */
2842 fp = fopen (hs->local_file, "wb");
2843 #endif /* def __VMS [else] */
2847 fp = fopen_excl (hs->local_file, FOPEN_BIN_FLAG);
2848 if (!fp && errno == EEXIST)
2850 /* We cannot just invent a new name and use it (which is
2851 what functions like unique_create typically do)
2852 because we told the user we'd use this name.
2853 Instead, return and retry the download. */
2854 logprintf (LOG_NOTQUIET,
2855 _("%s has sprung into existence.\n"),
2857 CLOSE_INVALIDATE (sock);
2860 return FOPEN_EXCL_ERR;
2865 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2866 CLOSE_INVALIDATE (sock);
2875 /* Print fetch message, if opt.verbose. */
2878 logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
2879 HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
2883 err = read_response_body (hs, sock, fp, contlen, contrange,
2884 chunked_transfer_encoding,
2885 u->url, warc_timestamp_str,
2886 warc_request_uuid, warc_ip, type,
2889 /* Now we no longer need to store the response header. */
2894 CLOSE_FINISH (sock);
2896 CLOSE_INVALIDATE (sock);
2904 /* The genuine HTTP loop! This is the part where the retrieval is
2905 retried, and retried, and retried, and... */
2907 http_loop (struct url *u, struct url *original_url, char **newloc,
2908 char **local_file, const char *referer, int *dt, struct url *proxy,
2912 bool got_head = false; /* used for time-stamping and filename detection */
2913 bool time_came_from_head = false;
2914 bool got_name = false;
2917 uerr_t err, ret = TRYLIMEXC;
2918 time_t tmr = -1; /* remote time-stamp */
2919 struct http_stat hstat; /* HTTP status */
2921 bool send_head_first = true;
2923 bool force_full_retrieve = false;
2926 /* If we are writing to a WARC file: always retrieve the whole file. */
2927 if (opt.warc_filename != NULL)
2928 force_full_retrieve = true;
2931 /* Assert that no value for *LOCAL_FILE was passed. */
2932 assert (local_file == NULL || *local_file == NULL);
2934 /* Set LOCAL_FILE parameter. */
2935 if (local_file && opt.output_document)
2936 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2938 /* Reset NEWLOC parameter. */
2941 /* This used to be done in main(), but it's a better idea to do it
2942 here so that we don't go through the hoops if we're just using
2947 /* Warn on (likely bogus) wildcard usage in HTTP. */
2948 if (opt.ftp_glob && has_wildcards_p (u->path))
2949 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2951 /* Setup hstat struct. */
2953 hstat.referer = referer;
2955 if (opt.output_document)
2957 hstat.local_file = xstrdup (opt.output_document);
2960 else if (!opt.content_disposition)
2963 url_file_name (opt.trustservernames ? u : original_url, NULL);
2967 if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
2969 /* If opt.noclobber is turned on and file already exists, do not
2970 retrieve the file. But if the output_document was given, then this
2971 test was already done and the file didn't exist. Hence the !opt.output_document */
2972 get_file_flags (hstat.local_file, dt);
2977 /* Reset the counter. */
2980 /* Reset the document type. */
2983 /* Skip preliminary HEAD request if we're not in spider mode. */
2985 send_head_first = false;
2987 /* Send preliminary HEAD request if -N is given and we have an existing
2988 * destination file. */
2989 file_name = url_file_name (opt.trustservernames ? u : original_url, NULL);
2990 if (opt.timestamping && (file_exists_p (file_name)
2991 || opt.content_disposition))
2992 send_head_first = true;
2998 /* Increment the pass counter. */
3000 sleep_between_retrievals (count);
3002 /* Get the current time string. */
3003 tms = datetime_str (time (NULL));
3005 if (opt.spider && !got_head)
3006 logprintf (LOG_VERBOSE, _("\
3007 Spider mode enabled. Check if remote file exists.\n"));
3009 /* Print fetch message, if opt.verbose. */
3012 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3017 sprintf (tmp, _("(try:%2d)"), count);
3018 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
3023 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
3028 ws_changetitle (hurl);
3033 /* Default document type is empty. However, if spider mode is
3034 on or time-stamping is employed, HEAD_ONLY commands is
3035 encoded within *dt. */
3036 if (send_head_first && !got_head)
3041 /* Decide whether or not to restart. */
3042 if (force_full_retrieve)
3043 hstat.restval = hstat.len;
3044 else if (opt.always_rest
3046 && stat (hstat.local_file, &st) == 0
3047 && S_ISREG (st.st_mode))
3048 /* When -c is used, continue from on-disk size. (Can't use
3049 hstat.len even if count>1 because we don't want a failed
3050 first attempt to clobber existing data.) */
3051 hstat.restval = st.st_size;
3053 /* otherwise, continue where the previous try left off */
3054 hstat.restval = hstat.len;
3058 /* Decide whether to send the no-cache directive. We send it in
3060 a) we're using a proxy, and we're past our first retrieval.
3061 Some proxies are notorious for caching incomplete data, so
3062 we require a fresh get.
3063 b) caching is explicitly inhibited. */
3064 if ((proxy && count > 1) /* a */
3065 || !opt.allow_cache) /* b */
3066 *dt |= SEND_NOCACHE;
3068 *dt &= ~SEND_NOCACHE;
3070 /* Try fetching the document, or at least its head. */
3071 err = gethttp (u, &hstat, dt, proxy, iri, count);
3074 tms = datetime_str (time (NULL));
3076 /* Get the new location (with or without the redirection). */
3078 *newloc = xstrdup (hstat.newloc);
3082 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
3083 case CONERROR: case READERR: case WRITEFAILED:
3084 case RANGEERR: case FOPEN_EXCL_ERR:
3085 /* Non-fatal errors continue executing the loop, which will
3086 bring them to "while" statement at the end, to judge
3087 whether the number of tries was exceeded. */
3088 printwhat (count, opt.ntry);
3090 case FWRITEERR: case FOPENERR:
3091 /* Another fatal error. */
3092 logputs (LOG_VERBOSE, "\n");
3093 logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
3094 quote (hstat.local_file), strerror (errno));
3095 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
3096 case SSLINITFAILED: case CONTNOTSUPPORTED: case VERIFCERTERR:
3097 /* Fatal errors just return from the function. */
3101 /* A fatal WARC error. */
3102 logputs (LOG_VERBOSE, "\n");
3103 logprintf (LOG_NOTQUIET, _("Cannot write to WARC file..\n"));
3106 case WARC_TMP_FOPENERR: case WARC_TMP_FWRITEERR:
3107 /* A fatal WARC error. */
3108 logputs (LOG_VERBOSE, "\n");
3109 logprintf (LOG_NOTQUIET, _("Cannot write to temporary WARC file.\n"));
3113 /* Another fatal error. */
3114 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
3118 /* Another fatal error. */
3119 logputs (LOG_VERBOSE, "\n");
3120 logprintf (LOG_NOTQUIET, _("Cannot unlink %s (%s).\n"),
3121 quote (hstat.local_file), strerror (errno));
3125 case NEWLOCATION_KEEP_POST:
3126 /* Return the new location to the caller. */
3129 logprintf (LOG_NOTQUIET,
3130 _("ERROR: Redirection (%d) without location.\n"),
3140 /* The file was already fully retrieved. */
3144 /* Deal with you later. */
3147 /* All possibilities should have been exhausted. */
3151 if (!(*dt & RETROKF))
3156 /* #### Ugly ugly ugly! */
3157 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3158 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
3161 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
3163 && (hstat.statcode == 500 || hstat.statcode == 501))
3168 /* Maybe we should always keep track of broken links, not just in
3170 * Don't log error if it was UTF-8 encoded because we will try
3171 * once unencoded. */
3172 else if (opt.spider && !iri->utf8_encode)
3174 /* #### Again: ugly ugly ugly! */
3176 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
3177 nonexisting_url (hurl);
3178 logprintf (LOG_NOTQUIET, _("\
3179 Remote file does not exist -- broken link!!!\n"));
3183 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
3184 tms, hstat.statcode,
3185 quotearg_style (escape_quoting_style, hstat.error));
3187 logputs (LOG_VERBOSE, "\n");
3193 /* Did we get the time-stamp? */
3196 got_head = true; /* no more time-stamping */
3198 if (opt.timestamping && !hstat.remote_time)
3200 logputs (LOG_NOTQUIET, _("\
3201 Last-modified header missing -- time-stamps turned off.\n"));
3203 else if (hstat.remote_time)
3205 /* Convert the date-string into struct tm. */
3206 tmr = http_atotm (hstat.remote_time);
3207 if (tmr == (time_t) (-1))
3208 logputs (LOG_VERBOSE, _("\
3209 Last-modified header invalid -- time-stamp ignored.\n"));
3210 if (*dt & HEAD_ONLY)
3211 time_came_from_head = true;
3214 if (send_head_first)
3216 /* The time-stamping section. */
3217 if (opt.timestamping)
3219 if (hstat.orig_file_name) /* Perform the following
3220 checks only if the file
3222 download already exists. */
3224 if (hstat.remote_time &&
3225 tmr != (time_t) (-1))
3227 /* Now time-stamping can be used validly.
3228 Time-stamping means that if the sizes of
3229 the local and remote file match, and local
3230 file is newer than the remote file, it will
3231 not be retrieved. Otherwise, the normal
3232 download procedure is resumed. */
3233 if (hstat.orig_file_tstamp >= tmr)
3235 if (hstat.contlen == -1
3236 || hstat.orig_file_size == hstat.contlen)
3238 logprintf (LOG_VERBOSE, _("\
3239 Server file no newer than local file %s -- not retrieving.\n\n"),
3240 quote (hstat.orig_file_name));
3246 logprintf (LOG_VERBOSE, _("\
3247 The sizes do not match (local %s) -- retrieving.\n"),
3248 number_to_static_string (hstat.orig_file_size));
3253 force_full_retrieve = true;
3254 logputs (LOG_VERBOSE,
3255 _("Remote file is newer, retrieving.\n"));
3258 logputs (LOG_VERBOSE, "\n");
3262 /* free_hstat (&hstat); */
3263 hstat.timestamp_checked = true;
3268 bool finished = true;
3273 logputs (LOG_VERBOSE, _("\
3274 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
3279 logprintf (LOG_VERBOSE, _("\
3280 Remote file exists but does not contain any link -- not retrieving.\n\n"));
3281 ret = RETROK; /* RETRUNNEEDED is not for caller. */
3288 logprintf (LOG_VERBOSE, _("\
3289 Remote file exists and could contain further links,\n\
3290 but recursion is disabled -- not retrieving.\n\n"));
3294 logprintf (LOG_VERBOSE, _("\
3295 Remote file exists.\n\n"));
3297 ret = RETROK; /* RETRUNNEEDED is not for caller. */
3302 logprintf (LOG_NONVERBOSE,
3303 _("%s URL: %s %2d %s\n"),
3304 tms, u->url, hstat.statcode,
3305 hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
3312 count = 0; /* the retrieve count for HEAD is reset */
3314 } /* send_head_first */
3317 if (opt.useservertimestamps
3318 && (tmr != (time_t) (-1))
3319 && ((hstat.len == hstat.contlen) ||
3320 ((hstat.res == 0) && (hstat.contlen == -1))))
3322 const char *fl = NULL;
3323 set_local_file (&fl, hstat.local_file);
3327 /* Reparse time header, in case it's changed. */
3328 if (time_came_from_head
3329 && hstat.remote_time && hstat.remote_time[0])
3331 newtmr = http_atotm (hstat.remote_time);
3332 if (newtmr != (time_t)-1)
3338 /* End of time-stamping section. */
3340 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
3341 total_download_time += hstat.dltime;
3343 if (hstat.len == hstat.contlen)
3347 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3349 logprintf (LOG_VERBOSE,
3351 ? _("%s (%s) - written to stdout %s[%s/%s]\n\n")
3352 : _("%s (%s) - %s saved [%s/%s]\n\n"),
3354 write_to_stdout ? "" : quote (hstat.local_file),
3355 number_to_static_string (hstat.len),
3356 number_to_static_string (hstat.contlen));
3357 logprintf (LOG_NONVERBOSE,
3358 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
3360 number_to_static_string (hstat.len),
3361 number_to_static_string (hstat.contlen),
3362 hstat.local_file, count);
3365 total_downloaded_bytes += hstat.rd_size;
3367 /* Remember that we downloaded the file for later ".orig" code. */
3368 if (*dt & ADDED_HTML_EXTENSION)
3369 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3371 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3376 else if (hstat.res == 0) /* No read error */
3378 if (hstat.contlen == -1) /* We don't know how much we were supposed
3379 to get, so assume we succeeded. */
3383 bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
3385 logprintf (LOG_VERBOSE,
3387 ? _("%s (%s) - written to stdout %s[%s]\n\n")
3388 : _("%s (%s) - %s saved [%s]\n\n"),
3390 write_to_stdout ? "" : quote (hstat.local_file),
3391 number_to_static_string (hstat.len));
3392 logprintf (LOG_NONVERBOSE,
3393 "%s URL:%s [%s] -> \"%s\" [%d]\n",
3394 tms, u->url, number_to_static_string (hstat.len),
3395 hstat.local_file, count);
3398 total_downloaded_bytes += hstat.rd_size;
3400 /* Remember that we downloaded the file for later ".orig" code. */
3401 if (*dt & ADDED_HTML_EXTENSION)
3402 downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
3404 downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
3409 else if (hstat.len < hstat.contlen) /* meaning we lost the
3410 connection too soon */
3412 logprintf (LOG_VERBOSE,
3413 _("%s (%s) - Connection closed at byte %s. "),
3414 tms, tmrate, number_to_static_string (hstat.len));
3415 printwhat (count, opt.ntry);
3418 else if (hstat.len != hstat.restval)
3419 /* Getting here would mean reading more data than
3420 requested with content-length, which we never do. */
3424 /* Getting here probably means that the content-length was
3425 * _less_ than the original, local size. We should probably
3426 * truncate or re-read, or something. FIXME */
3431 else /* from now on hstat.res can only be -1 */
3433 if (hstat.contlen == -1)
3435 logprintf (LOG_VERBOSE,
3436 _("%s (%s) - Read error at byte %s (%s)."),
3437 tms, tmrate, number_to_static_string (hstat.len),
3439 printwhat (count, opt.ntry);
3442 else /* hstat.res == -1 and contlen is given */
3444 logprintf (LOG_VERBOSE,
3445 _("%s (%s) - Read error at byte %s/%s (%s). "),
3447 number_to_static_string (hstat.len),
3448 number_to_static_string (hstat.contlen),
3450 printwhat (count, opt.ntry);
3456 while (!opt.ntry || (count < opt.ntry));
3459 if (ret == RETROK && local_file)
3460 *local_file = xstrdup (hstat.local_file);
3461 free_hstat (&hstat);
3466 /* Check whether the result of strptime() indicates success.
3467 strptime() returns the pointer to how far it got to in the string.
3468 The processing has been successful if the string is at `GMT' or
3469 `+X', or at the end of the string.
3471 In extended regexp parlance, the function returns 1 if P matches
3472 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
3473 can return) is considered a failure and 0 is returned. */
3475 check_end (const char *p)
3479 while (c_isspace (*p))
3482 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
3483 || ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
3489 /* Convert the textual specification of time in TIME_STRING to the
3490 number of seconds since the Epoch.
3492 TIME_STRING can be in any of the three formats RFC2616 allows the
3493 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
3494 as well as the time format used in the Set-Cookie header.
3495 Timezones are ignored, and should be GMT.
3497 Return the computed time_t representation, or -1 if the conversion
3500 This function uses strptime with various string formats for parsing
3501 TIME_STRING. This results in a parser that is not as lenient in
3502 interpreting TIME_STRING as I would like it to be. Being based on
3503 strptime, it always allows shortened months, one-digit days, etc.,
3504 but due to the multitude of formats in which time can be
3505 represented, an ideal HTTP time parser would be even more
3506 forgiving. It should completely ignore things like week days and
3507 concentrate only on the various forms of representing years,
3508 months, days, hours, minutes, and seconds. For example, it would
3509 be nice if it accepted ISO 8601 out of the box.
3511 I've investigated free and PD code for this purpose, but none was
3512 usable. getdate was big and unwieldy, and had potential copyright
3513 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
3514 distributed with phttpd, is excellent, but we cannot use it because
3515 it is not assigned to the FSF. So I stuck it with strptime. */
3518 http_atotm (const char *time_string)
3520 /* NOTE: Solaris strptime man page claims that %n and %t match white
3521 space, but that's not universally available. Instead, we simply
3522 use ` ' to mean "skip all WS", which works under all strptime
3523 implementations I've tested. */
3525 static const char *time_formats[] = {
3526 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
3527 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
3528 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
3529 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
3530 (used in Set-Cookie, defined in the
3531 Netscape cookie specification.) */
3533 const char *oldlocale;
3534 char savedlocale[256];
3536 time_t ret = (time_t) -1;
3538 /* Solaris strptime fails to recognize English month names in
3539 non-English locales, which we work around by temporarily setting
3540 locale to C before invoking strptime. */
3541 oldlocale = setlocale (LC_TIME, NULL);
3544 size_t l = strlen (oldlocale) + 1;
3545 if (l >= sizeof savedlocale)
3546 savedlocale[0] = '\0';
3548 memcpy (savedlocale, oldlocale, l);
3550 else savedlocale[0] = '\0';
3552 setlocale (LC_TIME, "C");
3554 for (i = 0; i < countof (time_formats); i++)
3558 /* Some versions of strptime use the existing contents of struct
3559 tm to recalculate the date according to format. Zero it out
3560 to prevent stack garbage from influencing strptime. */
3563 if (check_end (strptime (time_string, time_formats[i], &t)))
3570 /* Restore the previous locale. */
3572 setlocale (LC_TIME, savedlocale);
3577 /* Authorization support: We support three authorization schemes:
3579 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
3581 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
3582 consisting of answering to the server's challenge with the proper
3585 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
3586 Stenberg for libcurl. Like digest, NTLM is based on a
3587 challenge-response mechanism, but unlike digest, it is non-standard
3588 (authenticates TCP connections rather than requests), undocumented
3589 and Microsoft-specific. */
3591 /* Create the authentication header contents for the `Basic' scheme.
3592 This is done by encoding the string "USER:PASS" to base64 and
3593 prepending the string "Basic " in front of it. */
3596 basic_authentication_encode (const char *user, const char *passwd)
3599 int len1 = strlen (user) + 1 + strlen (passwd);
3601 t1 = (char *)alloca (len1 + 1);
3602 sprintf (t1, "%s:%s", user, passwd);
3604 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
3605 base64_encode (t1, len1, t2);
3607 return concat_strings ("Basic ", t2, (char *) 0);
3610 #define SKIP_WS(x) do { \
3611 while (c_isspace (*(x))) \
3615 #ifdef ENABLE_DIGEST
3616 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
3617 an array of 16 bytes containing the hash keys, and BUF should be a
3618 buffer of 33 writable characters (32 for hex digits plus one for
3619 zero termination). */
3621 dump_hash (char *buf, const unsigned char *hash)
3625 for (i = 0; i < MD5_DIGEST_SIZE; i++, hash++)
3627 *buf++ = XNUM_TO_digit (*hash >> 4);
3628 *buf++ = XNUM_TO_digit (*hash & 0xf);
3633 /* Take the line apart to find the challenge, and compose a digest
3634 authorization header. See RFC2069 section 2.1.2. */
3636 digest_authentication_encode (const char *au, const char *user,
3637 const char *passwd, const char *method,
3640 static char *realm, *opaque, *nonce;
3645 { "realm", &realm },
3646 { "opaque", &opaque },
3650 param_token name, value;
3652 realm = opaque = nonce = NULL;
3654 au += 6; /* skip over `Digest' */
3655 while (extract_param (&au, &name, &value, ','))
3658 size_t namelen = name.e - name.b;
3659 for (i = 0; i < countof (options); i++)
3660 if (namelen == strlen (options[i].name)
3661 && 0 == strncmp (name.b, options[i].name,
3664 *options[i].variable = strdupdelim (value.b, value.e);
3668 if (!realm || !nonce || !user || !passwd || !path || !method)
3671 xfree_null (opaque);
3676 /* Calculate the digest value. */
3679 unsigned char hash[MD5_DIGEST_SIZE];
3680 char a1buf[MD5_DIGEST_SIZE * 2 + 1], a2buf[MD5_DIGEST_SIZE * 2 + 1];
3681 char response_digest[MD5_DIGEST_SIZE * 2 + 1];
3683 /* A1BUF = H(user ":" realm ":" password) */
3684 md5_init_ctx (&ctx);
3685 md5_process_bytes ((unsigned char *)user, strlen (user), &ctx);
3686 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3687 md5_process_bytes ((unsigned char *)realm, strlen (realm), &ctx);
3688 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3689 md5_process_bytes ((unsigned char *)passwd, strlen (passwd), &ctx);
3690 md5_finish_ctx (&ctx, hash);
3691 dump_hash (a1buf, hash);
3693 /* A2BUF = H(method ":" path) */
3694 md5_init_ctx (&ctx);
3695 md5_process_bytes ((unsigned char *)method, strlen (method), &ctx);
3696 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3697 md5_process_bytes ((unsigned char *)path, strlen (path), &ctx);
3698 md5_finish_ctx (&ctx, hash);
3699 dump_hash (a2buf, hash);
3701 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3702 md5_init_ctx (&ctx);
3703 md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
3704 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3705 md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
3706 md5_process_bytes ((unsigned char *)":", 1, &ctx);
3707 md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
3708 md5_finish_ctx (&ctx, hash);
3709 dump_hash (response_digest, hash);
3711 res = xmalloc (strlen (user)
3716 + 2 * MD5_DIGEST_SIZE /*strlen (response_digest)*/
3717 + (opaque ? strlen (opaque) : 0)
3719 sprintf (res, "Digest \
3720 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3721 user, realm, nonce, path, response_digest);
3724 char *p = res + strlen (res);
3725 strcat (p, ", opaque=\"");
3732 #endif /* ENABLE_DIGEST */
3734 /* Computing the size of a string literal must take into account that
3735 value returned by sizeof includes the terminating \0. */
3736 #define STRSIZE(literal) (sizeof (literal) - 1)
3738 /* Whether chars in [b, e) begin with the literal string provided as
3739 first argument and are followed by whitespace or terminating \0.
3740 The comparison is case-insensitive. */
3741 #define STARTS(literal, b, e) \
3743 && ((size_t) ((e) - (b))) >= STRSIZE (literal) \
3744 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3745 && ((size_t) ((e) - (b)) == STRSIZE (literal) \
3746 || c_isspace (b[STRSIZE (literal)])))
3749 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3751 return STARTS ("Basic", hdrbeg, hdrend)
3752 #ifdef ENABLE_DIGEST
3753 || STARTS ("Digest", hdrbeg, hdrend)
3756 || STARTS ("NTLM", hdrbeg, hdrend)
3763 /* Create the HTTP authorization request header. When the
3764 `WWW-Authenticate' response header is seen, according to the
3765 authorization scheme specified in that header (`Basic' and `Digest'
3766 are supported by the current implementation), produce an
3767 appropriate HTTP authorization request header. */
3769 create_authorization_line (const char *au, const char *user,
3770 const char *passwd, const char *method,
3771 const char *path, bool *finished)
3773 /* We are called only with known schemes, so we can dispatch on the
3775 switch (c_toupper (*au))
3777 case 'B': /* Basic */
3779 return basic_authentication_encode (user, passwd);
3780 #ifdef ENABLE_DIGEST
3781 case 'D': /* Digest */
3783 return digest_authentication_encode (au, user, passwd, method, path);
3786 case 'N': /* NTLM */
3787 if (!ntlm_input (&pconn.ntlm, au))
3792 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3795 /* We shouldn't get here -- this function should be only called
3796 with values approved by known_authentication_scheme_p. */
3804 if (!wget_cookie_jar)
3805 wget_cookie_jar = cookie_jar_new ();
3806 if (opt.cookies_input && !cookies_loaded_p)
3808 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3809 cookies_loaded_p = true;
3816 if (wget_cookie_jar)
3817 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3823 xfree_null (pconn.host);
3824 if (wget_cookie_jar)
3825 cookie_jar_delete (wget_cookie_jar);
3829 ensure_extension (struct http_stat *hs, const char *ext, int *dt)
3831 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
3833 int len = strlen (ext);
3836 strncpy (shortext, ext, len - 1);
3837 shortext[len - 1] = '\0';
3840 if (last_period_in_local_filename == NULL
3841 || !(0 == strcasecmp (last_period_in_local_filename, shortext)
3842 || 0 == strcasecmp (last_period_in_local_filename, ext)))
3844 int local_filename_len = strlen (hs->local_file);
3845 /* Resize the local file, allowing for ".html" preceded by
3846 optional ".NUMBER". */
3847 hs->local_file = xrealloc (hs->local_file,
3848 local_filename_len + 24 + len);
3849 strcpy (hs->local_file + local_filename_len, ext);
3850 /* If clobbering is not allowed and the file, as named,
3851 exists, tack on ".NUMBER.html" instead. */
3852 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
3856 sprintf (hs->local_file + local_filename_len,
3857 ".%d%s", ext_num++, ext);
3858 while (file_exists_p (hs->local_file));
3860 *dt |= ADDED_HTML_EXTENSION;
3868 test_parse_content_disposition()
3876 { "filename=\"file.ext\"", "file.ext", true },
3877 { "attachment; filename=\"file.ext\"", "file.ext", true },
3878 { "attachment; filename=\"file.ext\"; dummy", "file.ext", true },
3879 { "attachment", NULL, false },
3880 { "attachement; filename*=UTF-8'en-US'hello.txt", "hello.txt", true },
3881 { "attachement; filename*0=\"hello\"; filename*1=\"world.txt\"", "helloworld.txt", true },
3884 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3889 res = parse_content_disposition (test_array[i].hdrval, &filename);
3891 mu_assert ("test_parse_content_disposition: wrong result",
3892 res == test_array[i].result
3894 || 0 == strcmp (test_array[i].filename, filename)));
3900 #endif /* TESTING */
3903 * vim: et sts=2 sw=2 cino+={s