2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget. If not, see <http://www.gnu.org/licenses/>.
20 Additional permission under GNU GPL version 3 section 7
22 If you modify this program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a
24 modified version of that library), containing parts covered by the
25 terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
26 grants you additional permission to convey the resulting work.
27 Corresponding Source for a non-source form of such a combination
28 shall include the source code for the parts of OpenSSL used as well
29 as that of the covered work. */
57 # include "http-ntlm.h"
70 extern char *version_string;
73 static char *create_authorization_line (const char *, const char *,
74 const char *, const char *,
75 const char *, bool *);
76 static char *basic_authentication_encode (const char *, const char *);
77 static bool known_authentication_scheme_p (const char *, const char *);
78 static void load_cookies (void);
81 # define MIN(x, y) ((x) > (y) ? (y) : (x))
85 static bool cookies_loaded_p;
86 static struct cookie_jar *wget_cookie_jar;
88 #define TEXTHTML_S "text/html"
89 #define TEXTXHTML_S "application/xhtml+xml"
91 /* Some status code validation macros: */
92 #define H_20X(x) (((x) >= 200) && ((x) < 300))
93 #define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
94 #define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
95 || (x) == HTTP_STATUS_MOVED_TEMPORARILY \
96 || (x) == HTTP_STATUS_SEE_OTHER \
97 || (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
99 /* HTTP/1.0 status codes from RFC1945, provided for reference. */
100 /* Successful 2xx. */
101 #define HTTP_STATUS_OK 200
102 #define HTTP_STATUS_CREATED 201
103 #define HTTP_STATUS_ACCEPTED 202
104 #define HTTP_STATUS_NO_CONTENT 204
105 #define HTTP_STATUS_PARTIAL_CONTENTS 206
107 /* Redirection 3xx. */
108 #define HTTP_STATUS_MULTIPLE_CHOICES 300
109 #define HTTP_STATUS_MOVED_PERMANENTLY 301
110 #define HTTP_STATUS_MOVED_TEMPORARILY 302
111 #define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
112 #define HTTP_STATUS_NOT_MODIFIED 304
113 #define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
115 /* Client error 4xx. */
116 #define HTTP_STATUS_BAD_REQUEST 400
117 #define HTTP_STATUS_UNAUTHORIZED 401
118 #define HTTP_STATUS_FORBIDDEN 403
119 #define HTTP_STATUS_NOT_FOUND 404
120 #define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
122 /* Server errors 5xx. */
123 #define HTTP_STATUS_INTERNAL 500
124 #define HTTP_STATUS_NOT_IMPLEMENTED 501
125 #define HTTP_STATUS_BAD_GATEWAY 502
126 #define HTTP_STATUS_UNAVAILABLE 503
129 rel_none, rel_name, rel_value, rel_both
136 struct request_header {
138 enum rp release_policy;
140 int hcount, hcapacity;
143 /* Create a new, empty request. At least request_set_method must be
144 called before the request can be used. */
146 static struct request *
149 struct request *req = xnew0 (struct request);
151 req->headers = xnew_array (struct request_header, req->hcapacity);
155 /* Set the request's method and its arguments. METH should be a
156 literal string (or it should outlive the request) because it will
157 not be freed. ARG will be freed by request_free. */
160 request_set_method (struct request *req, const char *meth, char *arg)
166 /* Return the method string passed with the last call to
167 request_set_method. */
170 request_method (const struct request *req)
175 /* Free one header according to the release policy specified with
176 request_set_header. */
179 release_header (struct request_header *hdr)
181 switch (hdr->release_policy)
198 /* Set the request named NAME to VALUE. Specifically, this means that
199 a "NAME: VALUE\r\n" header line will be used in the request. If a
200 header with the same name previously existed in the request, its
201 value will be replaced by this one. A NULL value means do nothing.
203 RELEASE_POLICY determines whether NAME and VALUE should be released
204 (freed) with request_free. Allowed values are:
206 - rel_none - don't free NAME or VALUE
207 - rel_name - free NAME when done
208 - rel_value - free VALUE when done
209 - rel_both - free both NAME and VALUE when done
211 Setting release policy is useful when arguments come from different
212 sources. For example:
214 // Don't free literal strings!
215 request_set_header (req, "Pragma", "no-cache", rel_none);
217 // Don't free a global variable, we'll need it later.
218 request_set_header (req, "Referer", opt.referer, rel_none);
220 // Value freshly allocated, free it when done.
221 request_set_header (req, "Range",
222 aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
227 request_set_header (struct request *req, char *name, char *value,
228 enum rp release_policy)
230 struct request_header *hdr;
235 /* A NULL value is a no-op; if freeing the name is requested,
236 free it now to avoid leaks. */
237 if (release_policy == rel_name || release_policy == rel_both)
242 for (i = 0; i < req->hcount; i++)
244 hdr = &req->headers[i];
245 if (0 == strcasecmp (name, hdr->name))
247 /* Replace existing header. */
248 release_header (hdr);
251 hdr->release_policy = release_policy;
256 /* Install new header. */
258 if (req->hcount >= req->hcapacity)
260 req->hcapacity <<= 1;
261 req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
263 hdr = &req->headers[req->hcount++];
266 hdr->release_policy = release_policy;
269 /* Like request_set_header, but sets the whole header line, as
270 provided by the user using the `--header' option. For example,
271 request_set_user_header (req, "Foo: bar") works just like
272 request_set_header (req, "Foo", "bar"). */
275 request_set_user_header (struct request *req, const char *header)
278 const char *p = strchr (header, ':');
281 BOUNDED_TO_ALLOCA (header, p, name);
283 while (c_isspace (*p))
285 request_set_header (req, xstrdup (name), (char *) p, rel_name);
288 /* Remove the header with specified name from REQ. Returns true if
289 the header was actually removed, false otherwise. */
292 request_remove_header (struct request *req, char *name)
295 for (i = 0; i < req->hcount; i++)
297 struct request_header *hdr = &req->headers[i];
298 if (0 == strcasecmp (name, hdr->name))
300 release_header (hdr);
301 /* Move the remaining headers by one. */
302 if (i < req->hcount - 1)
303 memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
311 #define APPEND(p, str) do { \
312 int A_len = strlen (str); \
313 memcpy (p, str, A_len); \
317 /* Construct the request and write it to FD using fd_write. */
320 request_send (const struct request *req, int fd)
322 char *request_string, *p;
323 int i, size, write_error;
325 /* Count the request size. */
328 /* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
329 size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
331 for (i = 0; i < req->hcount; i++)
333 struct request_header *hdr = &req->headers[i];
334 /* NAME ": " VALUE "\r\n" */
335 size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
341 p = request_string = alloca_array (char, size);
343 /* Generate the request. */
345 APPEND (p, req->method); *p++ = ' ';
346 APPEND (p, req->arg); *p++ = ' ';
347 memcpy (p, "HTTP/1.0\r\n", 10); p += 10;
349 for (i = 0; i < req->hcount; i++)
351 struct request_header *hdr = &req->headers[i];
352 APPEND (p, hdr->name);
353 *p++ = ':', *p++ = ' ';
354 APPEND (p, hdr->value);
355 *p++ = '\r', *p++ = '\n';
358 *p++ = '\r', *p++ = '\n', *p++ = '\0';
359 assert (p - request_string == size);
363 DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
365 /* Send the request to the server. */
367 write_error = fd_write (fd, request_string, size - 1, -1);
369 logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
374 /* Release the resources used by REQ. */
377 request_free (struct request *req)
380 xfree_null (req->arg);
381 for (i = 0; i < req->hcount; i++)
382 release_header (&req->headers[i]);
383 xfree_null (req->headers);
387 static struct hash_table *basic_authed_hosts;
389 /* Find out if this host has issued a Basic challenge yet; if so, give
390 * it the username, password. A temporary measure until we can get
391 * proper authentication in place. */
394 maybe_send_basic_creds (const char *hostname, const char *user,
395 const char *passwd, struct request *req)
397 bool do_challenge = false;
399 if (opt.auth_without_challenge)
401 DEBUGP(("Auth-without-challenge set, sending Basic credentials.\n"));
404 else if (basic_authed_hosts
405 && hash_table_contains(basic_authed_hosts, hostname))
407 DEBUGP(("Found %s in basic_authed_hosts.\n", quote (hostname)));
412 DEBUGP(("Host %s has not issued a general basic challenge.\n",
417 request_set_header (req, "Authorization",
418 basic_authentication_encode (user, passwd),
425 register_basic_auth_host (const char *hostname)
427 if (!basic_authed_hosts)
429 basic_authed_hosts = make_nocase_string_hash_table (1);
431 if (!hash_table_contains(basic_authed_hosts, hostname))
433 hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
434 DEBUGP(("Inserted %s into basic_authed_hosts\n", quote (hostname)));
439 /* Send the contents of FILE_NAME to SOCK. Make sure that exactly
440 PROMISED_SIZE bytes are sent over the wire -- if the file is
441 longer, read only that much; if the file is shorter, report an error. */
444 post_file (int sock, const char *file_name, wgint promised_size)
446 static char chunk[8192];
451 DEBUGP (("[writing POST file %s ... ", file_name));
453 fp = fopen (file_name, "rb");
456 while (!feof (fp) && written < promised_size)
459 int length = fread (chunk, 1, sizeof (chunk), fp);
462 towrite = MIN (promised_size - written, length);
463 write_error = fd_write (sock, chunk, towrite, -1);
473 /* If we've written less than was promised, report a (probably
474 nonsensical) error rather than break the promise. */
475 if (written < promised_size)
481 assert (written == promised_size);
482 DEBUGP (("done]\n"));
486 /* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
487 If so, return the pointer to the position after the line, otherwise
488 return NULL. This is used as callback to fd_read_hunk. The data
489 between START and PEEKED has been read and cannot be "unread"; the
490 data after PEEKED has only been peeked. */
493 response_head_terminator (const char *start, const char *peeked, int peeklen)
497 /* If at first peek, verify whether HUNK starts with "HTTP". If
498 not, this is a HTTP/0.9 request and we must bail out without
500 if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
503 /* Look for "\n[\r]\n", and return the following position if found.
504 Start two chars before the current to cover the possibility that
505 part of the terminator (e.g. "\n\r") arrived in the previous
507 p = peeked - start < 2 ? start : peeked - 2;
508 end = peeked + peeklen;
510 /* Check for \n\r\n or \n\n anywhere in [p, end-2). */
511 for (; p < end - 2; p++)
514 if (p[1] == '\r' && p[2] == '\n')
516 else if (p[1] == '\n')
519 /* p==end-2: check for \n\n directly preceding END. */
520 if (p[0] == '\n' && p[1] == '\n')
526 /* The maximum size of a single HTTP response we care to read. Rather
527 than being a limit of the reader implementation, this limit
528 prevents Wget from slurping all available memory upon encountering
529 malicious or buggy server output, thus protecting the user. Define
530 it to 0 to remove the limit. */
532 #define HTTP_RESPONSE_MAX_SIZE 65536
534 /* Read the HTTP request head from FD and return it. The error
535 conditions are the same as with fd_read_hunk.
537 To support HTTP/0.9 responses, this function tries to make sure
538 that the data begins with "HTTP". If this is not the case, no data
539 is read and an empty request is returned, so that the remaining
540 data can be treated as body. */
543 read_http_response_head (int fd)
545 return fd_read_hunk (fd, response_head_terminator, 512,
546 HTTP_RESPONSE_MAX_SIZE);
550 /* The response data. */
553 /* The array of pointers that indicate where each header starts.
554 For example, given this HTTP response:
561 The headers are located like this:
563 "HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
565 headers[0] headers[1] headers[2] headers[3]
567 I.e. headers[0] points to the beginning of the request,
568 headers[1] points to the end of the first header and the
569 beginning of the second one, etc. */
571 const char **headers;
574 /* Create a new response object from the text of the HTTP response,
575 available in HEAD. That text is automatically split into
576 constituent header lines for fast retrieval using
579 static struct response *
580 resp_new (const char *head)
585 struct response *resp = xnew0 (struct response);
590 /* Empty head means that we're dealing with a headerless
591 (HTTP/0.9) response. In that case, don't set HEADERS at
596 /* Split HEAD into header lines, so that resp_header_* functions
597 don't need to do this over and over again. */
603 DO_REALLOC (resp->headers, size, count + 1, const char *);
604 resp->headers[count++] = hdr;
606 /* Break upon encountering an empty line. */
607 if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
610 /* Find the end of HDR, including continuations. */
613 const char *end = strchr (hdr, '\n');
619 while (*hdr == ' ' || *hdr == '\t');
621 DO_REALLOC (resp->headers, size, count + 1, const char *);
622 resp->headers[count] = NULL;
627 /* Locate the header named NAME in the request data, starting with
628 position START. This allows the code to loop through the request
629 data, filtering for all requests of a given name. Returns the
630 found position, or -1 for failure. The code that uses this
631 function typically looks like this:
633 for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
634 ... do something with header ...
636 If you only care about one header, use resp_header_get instead of
640 resp_header_locate (const struct response *resp, const char *name, int start,
641 const char **begptr, const char **endptr)
644 const char **headers = resp->headers;
647 if (!headers || !headers[1])
650 name_len = strlen (name);
656 for (; headers[i + 1]; i++)
658 const char *b = headers[i];
659 const char *e = headers[i + 1];
661 && b[name_len] == ':'
662 && 0 == strncasecmp (b, name, name_len))
665 while (b < e && c_isspace (*b))
667 while (b < e && c_isspace (e[-1]))
677 /* Find and retrieve the header named NAME in the request data. If
678 found, set *BEGPTR to its starting, and *ENDPTR to its ending
679 position, and return true. Otherwise return false.
681 This function is used as a building block for resp_header_copy
682 and resp_header_strdup. */
685 resp_header_get (const struct response *resp, const char *name,
686 const char **begptr, const char **endptr)
688 int pos = resp_header_locate (resp, name, 0, begptr, endptr);
692 /* Copy the response header named NAME to buffer BUF, no longer than
693 BUFSIZE (BUFSIZE includes the terminating 0). If the header
694 exists, true is returned, false otherwise. If there should be no
695 limit on the size of the header, use resp_header_strdup instead.
697 If BUFSIZE is 0, no data is copied, but the boolean indication of
698 whether the header is present is still returned. */
701 resp_header_copy (const struct response *resp, const char *name,
702 char *buf, int bufsize)
705 if (!resp_header_get (resp, name, &b, &e))
709 int len = MIN (e - b, bufsize - 1);
710 memcpy (buf, b, len);
716 /* Return the value of header named NAME in RESP, allocated with
717 malloc. If such a header does not exist in RESP, return NULL. */
720 resp_header_strdup (const struct response *resp, const char *name)
723 if (!resp_header_get (resp, name, &b, &e))
725 return strdupdelim (b, e);
728 /* Parse the HTTP status line, which is of format:
730 HTTP-Version SP Status-Code SP Reason-Phrase
732 The function returns the status-code, or -1 if the status line
733 appears malformed. The pointer to "reason-phrase" message is
734 returned in *MESSAGE. */
737 resp_status (const struct response *resp, char **message)
744 /* For a HTTP/0.9 response, assume status 200. */
746 *message = xstrdup (_("No headers, assuming HTTP/0.9"));
750 p = resp->headers[0];
751 end = resp->headers[1];
757 if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
761 /* Match the HTTP version. This is optional because Gnutella
762 servers have been reported to not specify HTTP version. */
763 if (p < end && *p == '/')
766 while (p < end && c_isdigit (*p))
768 if (p < end && *p == '.')
770 while (p < end && c_isdigit (*p))
774 while (p < end && c_isspace (*p))
776 if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
779 status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
784 while (p < end && c_isspace (*p))
786 while (p < end && c_isspace (end[-1]))
788 *message = strdupdelim (p, end);
794 /* Release the resources used by RESP. */
797 resp_free (struct response *resp)
799 xfree_null (resp->headers);
803 /* Print a single line of response, the characters [b, e). We tried
805 logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
806 but that failed to escape the non-printable characters and, in fact,
807 caused crashes in UTF-8 locales. */
810 print_response_line(const char *prefix, const char *b, const char *e)
813 BOUNDED_TO_ALLOCA(b, e, copy);
814 logprintf (LOG_ALWAYS, "%s%s\n", prefix,
815 quotearg_style (escape_quoting_style, copy));
818 /* Print the server response, line by line, omitting the trailing CRLF
819 from individual header lines, and prefixed with PREFIX. */
822 print_server_response (const struct response *resp, const char *prefix)
827 for (i = 0; resp->headers[i + 1]; i++)
829 const char *b = resp->headers[i];
830 const char *e = resp->headers[i + 1];
832 if (b < e && e[-1] == '\n')
834 if (b < e && e[-1] == '\r')
836 print_response_line(prefix, b, e);
840 /* Parse the `Content-Range' header and extract the information it
841 contains. Returns true if successful, false otherwise. */
843 parse_content_range (const char *hdr, wgint *first_byte_ptr,
844 wgint *last_byte_ptr, wgint *entity_length_ptr)
848 /* Ancient versions of Netscape proxy server, presumably predating
849 rfc2068, sent out `Content-Range' without the "bytes"
851 if (0 == strncasecmp (hdr, "bytes", 5))
854 /* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
858 while (c_isspace (*hdr))
863 if (!c_isdigit (*hdr))
865 for (num = 0; c_isdigit (*hdr); hdr++)
866 num = 10 * num + (*hdr - '0');
867 if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
869 *first_byte_ptr = num;
871 for (num = 0; c_isdigit (*hdr); hdr++)
872 num = 10 * num + (*hdr - '0');
873 if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
875 *last_byte_ptr = num;
880 for (num = 0; c_isdigit (*hdr); hdr++)
881 num = 10 * num + (*hdr - '0');
882 *entity_length_ptr = num;
886 /* Read the body of the request, but don't store it anywhere and don't
887 display a progress gauge. This is useful for reading the bodies of
888 administrative responses to which we will soon issue another
889 request. The response is not useful to the user, but reading it
890 allows us to continue using the same connection to the server.
892 If reading fails, false is returned, true otherwise. In debug
893 mode, the body is displayed for debugging purposes. */
896 skip_short_body (int fd, wgint contlen)
899 SKIP_SIZE = 512, /* size of the download buffer */
900 SKIP_THRESHOLD = 4096 /* the largest size we read */
902 char dlbuf[SKIP_SIZE + 1];
903 dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
905 /* We shouldn't get here with unknown contlen. (This will change
906 with HTTP/1.1, which supports "chunked" transfer.) */
907 assert (contlen != -1);
909 /* If the body is too large, it makes more sense to simply close the
910 connection than to try to read the body. */
911 if (contlen > SKIP_THRESHOLD)
914 DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
918 int ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
921 /* Don't normally report the error since this is an
922 optimization that should be invisible to the user. */
923 DEBUGP (("] aborting (%s).\n",
924 ret < 0 ? fd_errstr (fd) : "EOF received"));
928 /* Safe even if %.*s bogusly expects terminating \0 because
929 we've zero-terminated dlbuf above. */
930 DEBUGP (("%.*s", ret, dlbuf));
933 DEBUGP (("] done.\n"));
937 /* Extract a parameter from the string (typically an HTTP header) at
938 **SOURCE and advance SOURCE to the next parameter. Return false
939 when there are no more parameters to extract. The name of the
940 parameter is returned in NAME, and the value in VALUE. If the
941 parameter has no value, the token's value is zeroed out.
943 For example, if *SOURCE points to the string "attachment;
944 filename=\"foo bar\"", the first call to this function will return
945 the token named "attachment" and no value, and the second call will
946 return the token named "filename" and value "foo bar". The third
947 call will return false, indicating no more valid tokens. */
950 extract_param (const char **source, param_token *name, param_token *value,
953 const char *p = *source;
955 while (c_isspace (*p)) ++p;
959 return false; /* no error; nothing more to extract */
964 while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
966 if (name->b == name->e)
967 return false; /* empty name: error */
968 while (c_isspace (*p)) ++p;
969 if (*p == separator || !*p) /* no value */
972 if (*p == separator) ++p;
977 return false; /* error */
979 /* *p is '=', extract value */
981 while (c_isspace (*p)) ++p;
982 if (*p == '"') /* quoted */
985 while (*p && *p != '"') ++p;
989 /* Currently at closing quote; find the end of param. */
990 while (c_isspace (*p)) ++p;
991 while (*p && *p != separator) ++p;
995 /* garbage after closed quote, e.g. foo="bar"baz */
1001 while (*p && *p != separator) ++p;
1003 while (value->e != value->b && c_isspace (value->e[-1]))
1005 if (*p == separator) ++p;
1012 #define MAX(p, q) ((p) > (q) ? (p) : (q))
1014 /* Parse the contents of the `Content-Disposition' header, extracting
1015 the information useful to Wget. Content-Disposition is a header
1016 borrowed from MIME; when used in HTTP, it typically serves for
1017 specifying the desired file name of the resource. For example:
1019 Content-Disposition: attachment; filename="flora.jpg"
1021 Wget will skip the tokens it doesn't care about, such as
1022 "attachment" in the previous example; it will also skip other
1023 unrecognized params. If the header is syntactically correct and
1024 contains a file name, a copy of the file name is stored in
1025 *filename and true is returned. Otherwise, the function returns
1028 The file name is stripped of directory components and must not be
1032 parse_content_disposition (const char *hdr, char **filename)
1034 param_token name, value;
1035 while (extract_param (&hdr, &name, &value, ';'))
1036 if (BOUNDED_EQUAL_NO_CASE (name.b, name.e, "filename") && value.b != NULL)
1038 /* Make the file name begin at the last slash or backslash. */
1039 const char *last_slash = memrchr (value.b, '/', value.e - value.b);
1040 const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
1041 if (last_slash && last_bs)
1042 value.b = 1 + MAX (last_slash, last_bs);
1043 else if (last_slash || last_bs)
1044 value.b = 1 + (last_slash ? last_slash : last_bs);
1045 if (value.b == value.e)
1047 /* Start with the directory prefix, if specified. */
1050 int prefix_length = strlen (opt.dir_prefix);
1051 bool add_slash = (opt.dir_prefix[prefix_length - 1] != '/');
1056 total_length = prefix_length + (value.e - value.b);
1057 *filename = xmalloc (total_length + 1);
1058 strcpy (*filename, opt.dir_prefix);
1060 (*filename)[prefix_length - 1] = '/';
1061 memcpy (*filename + prefix_length, value.b, (value.e - value.b));
1062 (*filename)[total_length] = '\0';
1065 *filename = strdupdelim (value.b, value.e);
1071 /* Persistent connections. Currently, we cache the most recently used
1072 connection as persistent, provided that the HTTP server agrees to
1073 make it such. The persistence data is stored in the variables
1074 below. Ideally, it should be possible to cache an arbitrary fixed
1075 number of these connections. */
1077 /* Whether a persistent connection is active. */
1078 static bool pconn_active;
1081 /* The socket of the connection. */
1084 /* Host and port of the currently active persistent connection. */
1088 /* Whether a ssl handshake has occoured on this connection. */
1091 /* Whether the connection was authorized. This is only done by
1092 NTLM, which authorizes *connections* rather than individual
1093 requests. (That practice is peculiar for HTTP, but it is a
1094 useful optimization.) */
1098 /* NTLM data of the current connection. */
1099 struct ntlmdata ntlm;
1103 /* Mark the persistent connection as invalid and free the resources it
1104 uses. This is used by the CLOSE_* macros after they forcefully
1105 close a registered persistent connection. */
1108 invalidate_persistent (void)
1110 DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
1111 pconn_active = false;
1112 fd_close (pconn.socket);
1117 /* Register FD, which should be a TCP/IP connection to HOST:PORT, as
1118 persistent. This will enable someone to use the same connection
1119 later. In the context of HTTP, this must be called only AFTER the
1120 response has been received and the server has promised that the
1121 connection will remain alive.
1123 If a previous connection was persistent, it is closed. */
1126 register_persistent (const char *host, int port, int fd, bool ssl)
1130 if (pconn.socket == fd)
1132 /* The connection FD is already registered. */
1137 /* The old persistent connection is still active; close it
1138 first. This situation arises whenever a persistent
1139 connection exists, but we then connect to a different
1140 host, and try to register a persistent connection to that
1142 invalidate_persistent ();
1146 pconn_active = true;
1148 pconn.host = xstrdup (host);
1151 pconn.authorized = false;
1153 DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
1156 /* Return true if a persistent connection is available for connecting
1160 persistent_available_p (const char *host, int port, bool ssl,
1161 bool *host_lookup_failed)
1163 /* First, check whether a persistent connection is active at all. */
1167 /* If we want SSL and the last connection wasn't or vice versa,
1168 don't use it. Checking for host and port is not enough because
1169 HTTP and HTTPS can apparently coexist on the same port. */
1170 if (ssl != pconn.ssl)
1173 /* If we're not connecting to the same port, we're not interested. */
1174 if (port != pconn.port)
1177 /* If the host is the same, we're in business. If not, there is
1178 still hope -- read below. */
1179 if (0 != strcasecmp (host, pconn.host))
1181 /* Check if pconn.socket is talking to HOST under another name.
1182 This happens often when both sites are virtual hosts
1183 distinguished only by name and served by the same network
1184 interface, and hence the same web server (possibly set up by
1185 the ISP and serving many different web sites). This
1186 admittedly unconventional optimization does not contradict
1187 HTTP and works well with popular server software. */
1191 struct address_list *al;
1194 /* Don't try to talk to two different SSL sites over the same
1195 secure connection! (Besides, it's not clear that
1196 name-based virtual hosting is even possible with SSL.) */
1199 /* If pconn.socket's peer is one of the IP addresses HOST
1200 resolves to, pconn.socket is for all intents and purposes
1201 already talking to HOST. */
1203 if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
1205 /* Can't get the peer's address -- something must be very
1206 wrong with the connection. */
1207 invalidate_persistent ();
1210 al = lookup_host (host, 0);
1213 *host_lookup_failed = true;
1217 found = address_list_contains (al, &ip);
1218 address_list_release (al);
1223 /* The persistent connection's peer address was found among the
1224 addresses HOST resolved to; therefore, pconn.sock is in fact
1225 already talking to HOST -- no need to reconnect. */
1228 /* Finally, check whether the connection is still open. This is
1229 important because most servers implement liberal (short) timeout
1230 on persistent connections. Wget can of course always reconnect
1231 if the connection doesn't work out, but it's nicer to know in
1232 advance. This test is a logical followup of the first test, but
1233 is "expensive" and therefore placed at the end of the list.
1235 (Current implementation of test_socket_open has a nice side
1236 effect that it treats sockets with pending data as "closed".
1237 This is exactly what we want: if a broken server sends message
1238 body in response to HEAD, or if it sends more than conent-length
1239 data, we won't reuse the corrupted connection.) */
1241 if (!test_socket_open (pconn.socket))
1243 /* Oops, the socket is no longer open. Now that we know that,
1244 let's invalidate the persistent connection before returning
1246 invalidate_persistent ();
1253 /* The idea behind these two CLOSE macros is to distinguish between
1254 two cases: one when the job we've been doing is finished, and we
1255 want to close the connection and leave, and two when something is
1256 seriously wrong and we're closing the connection as part of
1259 In case of keep_alive, CLOSE_FINISH should leave the connection
1260 open, while CLOSE_INVALIDATE should still close it.
1262 Note that the semantics of the flag `keep_alive' is "this
1263 connection *will* be reused (the server has promised not to close
1264 the connection once we're done)", while the semantics of
1265 `pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
1266 active, registered connection". */
1268 #define CLOSE_FINISH(fd) do { \
1271 if (pconn_active && (fd) == pconn.socket) \
1272 invalidate_persistent (); \
1281 #define CLOSE_INVALIDATE(fd) do { \
1282 if (pconn_active && (fd) == pconn.socket) \
1283 invalidate_persistent (); \
1291 wgint len; /* received length */
1292 wgint contlen; /* expected length */
1293 wgint restval; /* the restart value */
1294 int res; /* the result of last read */
1295 char *rderrmsg; /* error message from read error */
1296 char *newloc; /* new location (redirection) */
1297 char *remote_time; /* remote time-stamp string */
1298 char *error; /* textual HTTP error */
1299 int statcode; /* status code */
1300 char *message; /* status message */
1301 wgint rd_size; /* amount of data read from socket */
1302 double dltime; /* time it took to download the data */
1303 const char *referer; /* value of the referer header. */
1304 char *local_file; /* local file name. */
1305 bool existence_checked; /* true if we already checked for a file's
1306 existence after having begun to download
1307 (needed in gethttp for when connection is
1308 interrupted/restarted. */
1309 bool timestamp_checked; /* true if pre-download time-stamping checks
1310 * have already been performed */
1311 char *orig_file_name; /* name of file to compare for time-stamping
1312 * (might be != local_file if -K is set) */
1313 wgint orig_file_size; /* size of file to compare for time-stamping */
1314 time_t orig_file_tstamp; /* time-stamp of file to compare for
1319 free_hstat (struct http_stat *hs)
1321 xfree_null (hs->newloc);
1322 xfree_null (hs->remote_time);
1323 xfree_null (hs->error);
1324 xfree_null (hs->rderrmsg);
1325 xfree_null (hs->local_file);
1326 xfree_null (hs->orig_file_name);
1327 xfree_null (hs->message);
1329 /* Guard against being called twice. */
1331 hs->remote_time = NULL;
1335 #define BEGINS_WITH(line, string_constant) \
1336 (!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
1337 && (c_isspace (line[sizeof (string_constant) - 1]) \
1338 || !line[sizeof (string_constant) - 1]))
1340 #define SET_USER_AGENT(req) do { \
1341 if (!opt.useragent) \
1342 request_set_header (req, "User-Agent", \
1343 aprintf ("Wget/%s", version_string), rel_value); \
1344 else if (*opt.useragent) \
1345 request_set_header (req, "User-Agent", opt.useragent, rel_none); \
1348 /* The flags that allow clobbering the file (opening with "wb").
1349 Defined here to avoid repetition later. #### This will require
1351 #define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
1352 || opt.dirstruct || opt.output_document)
1354 /* Retrieve a document through HTTP protocol. It recognizes status
1355 code, and correctly handles redirections. It closes the network
1356 socket. If it receives an error from the functions below it, it
1357 will print it if there is enough information to do so (almost
1358 always), returning the error to the caller (i.e. http_loop).
1360 Various HTTP parameters are stored to hs.
1362 If PROXY is non-NULL, the connection will be made to the proxy
1363 server, and u->url will be requested. */
1365 gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy)
1367 struct request *req;
1370 char *user, *passwd;
1374 wgint contlen, contrange;
1381 /* Set to 1 when the authorization has already been sent and should
1382 not be tried again. */
1383 bool auth_finished = false;
1385 /* Set to 1 when just globally-set Basic authorization has been sent;
1386 * should prevent further Basic negotiations, but not other
1388 bool basic_auth_finished = false;
1390 /* Whether NTLM authentication is used for this request. */
1391 bool ntlm_seen = false;
1393 /* Whether our connection to the remote host is through SSL. */
1394 bool using_ssl = false;
1396 /* Whether a HEAD request will be issued (as opposed to GET or
1398 bool head_only = !!(*dt & HEAD_ONLY);
1401 struct response *resp;
1405 /* Whether this connection will be kept alive after the HTTP request
1409 /* Whether keep-alive should be inhibited.
1411 RFC 2068 requests that 1.0 clients not send keep-alive requests
1412 to proxies. This is because many 1.0 proxies do not interpret
1413 the Connection header and transfer it to the remote server,
1414 causing it to not close the connection and leave both the proxy
1415 and the client hanging. */
1416 bool inhibit_keep_alive =
1417 !opt.http_keep_alive || opt.ignore_length || proxy != NULL;
1419 /* Headers sent when using POST. */
1420 wgint post_data_size = 0;
1422 bool host_lookup_failed = false;
1425 if (u->scheme == SCHEME_HTTPS)
1427 /* Initialize the SSL context. After this has once been done,
1428 it becomes a no-op. */
1431 scheme_disable (SCHEME_HTTPS);
1432 logprintf (LOG_NOTQUIET,
1433 _("Disabling SSL due to encountered errors.\n"));
1434 return SSLINITFAILED;
1437 #endif /* HAVE_SSL */
1439 /* Initialize certain elements of struct http_stat. */
1443 hs->rderrmsg = NULL;
1445 hs->remote_time = NULL;
1451 /* Prepare the request to send. */
1453 req = request_new ();
1456 const char *meth = "GET";
1459 else if (opt.post_file_name || opt.post_data)
1461 /* Use the full path, i.e. one that includes the leading slash and
1462 the query string. E.g. if u->path is "foo/bar" and u->query is
1463 "param=value", full_path will be "/foo/bar?param=value". */
1466 /* When using SSL over proxy, CONNECT establishes a direct
1467 connection to the HTTPS server. Therefore use the same
1468 argument as when talking to the server directly. */
1469 && u->scheme != SCHEME_HTTPS
1472 meth_arg = xstrdup (u->url);
1474 meth_arg = url_full_path (u);
1475 request_set_method (req, meth, meth_arg);
1478 request_set_header (req, "Referer", (char *) hs->referer, rel_none);
1479 if (*dt & SEND_NOCACHE)
1480 request_set_header (req, "Pragma", "no-cache", rel_none);
1482 request_set_header (req, "Range",
1483 aprintf ("bytes=%s-",
1484 number_to_static_string (hs->restval)),
1486 SET_USER_AGENT (req);
1487 request_set_header (req, "Accept", "*/*", rel_none);
1489 /* Find the username and password for authentication. */
1492 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
1493 user = user ? user : (opt.http_user ? opt.http_user : opt.user);
1494 passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
1497 && !u->user) /* We only do "site-wide" authentication with "global"
1498 user/password values; URL user/password info overrides. */
1500 /* If this is a host for which we've already received a Basic
1501 * challenge, we'll go ahead and send Basic authentication creds. */
1502 basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
1505 /* Generate the Host header, HOST:PORT. Take into account that:
1507 - Broken server-side software often doesn't recognize the PORT
1508 argument, so we must generate "Host: www.server.com" instead of
1509 "Host: www.server.com:80" (and likewise for https port).
1511 - IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
1512 becomes ambiguous and needs to be rewritten as "Host:
1513 [3ffe:8100:200:2::2]:1234". */
1515 /* Formats arranged for hfmt[add_port][add_squares]. */
1516 static const char *hfmt[][2] = {
1517 { "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
1519 int add_port = u->port != scheme_default_port (u->scheme);
1520 int add_squares = strchr (u->host, ':') != NULL;
1521 request_set_header (req, "Host",
1522 aprintf (hfmt[add_port][add_squares], u->host, u->port),
1526 if (!inhibit_keep_alive)
1527 request_set_header (req, "Connection", "Keep-Alive", rel_none);
1530 request_set_header (req, "Cookie",
1531 cookie_header (wget_cookie_jar,
1532 u->host, u->port, u->path,
1534 u->scheme == SCHEME_HTTPS
1541 if (opt.post_data || opt.post_file_name)
1543 request_set_header (req, "Content-Type",
1544 "application/x-www-form-urlencoded", rel_none);
1546 post_data_size = strlen (opt.post_data);
1549 post_data_size = file_size (opt.post_file_name);
1550 if (post_data_size == -1)
1552 logprintf (LOG_NOTQUIET, _("POST data file %s missing: %s\n"),
1553 quote (opt.post_file_name), strerror (errno));
1557 request_set_header (req, "Content-Length",
1558 xstrdup (number_to_static_string (post_data_size)),
1562 /* Add the user headers. */
1563 if (opt.user_headers)
1566 for (i = 0; opt.user_headers[i]; i++)
1567 request_set_user_header (req, opt.user_headers[i]);
1571 /* We need to come back here when the initial attempt to retrieve
1572 without authorization header fails. (Expected to happen at least
1573 for the Digest authorization scheme.) */
1578 char *proxy_user, *proxy_passwd;
1579 /* For normal username and password, URL components override
1580 command-line/wgetrc parameters. With proxy
1581 authentication, it's the reverse, because proxy URLs are
1582 normally the "permanent" ones, so command-line args
1583 should take precedence. */
1584 if (opt.proxy_user && opt.proxy_passwd)
1586 proxy_user = opt.proxy_user;
1587 proxy_passwd = opt.proxy_passwd;
1591 proxy_user = proxy->user;
1592 proxy_passwd = proxy->passwd;
1594 /* #### This does not appear right. Can't the proxy request,
1595 say, `Digest' authentication? */
1596 if (proxy_user && proxy_passwd)
1597 proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
1599 /* If we're using a proxy, we will be connecting to the proxy
1603 /* Proxy authorization over SSL is handled below. */
1605 if (u->scheme != SCHEME_HTTPS)
1607 request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
1612 /* Establish the connection. */
1614 if (!inhibit_keep_alive)
1616 /* Look for a persistent connection to target host, unless a
1617 proxy is used. The exception is when SSL is in use, in which
1618 case the proxy is nothing but a passthrough to the target
1619 host, registered as a connection to the latter. */
1620 struct url *relevant = conn;
1622 if (u->scheme == SCHEME_HTTPS)
1626 if (persistent_available_p (relevant->host, relevant->port,
1628 relevant->scheme == SCHEME_HTTPS,
1632 &host_lookup_failed))
1634 sock = pconn.socket;
1635 using_ssl = pconn.ssl;
1636 logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
1637 quotearg_style (escape_quoting_style, pconn.host),
1639 DEBUGP (("Reusing fd %d.\n", sock));
1640 if (pconn.authorized)
1641 /* If the connection is already authorized, the "Basic"
1642 authorization added by code above is unnecessary and
1644 request_remove_header (req, "Authorization");
1646 else if (host_lookup_failed)
1649 logprintf(LOG_NOTQUIET,
1650 _("%s: unable to resolve host address %s\n"),
1651 exec_name, quote (relevant->host));
1658 sock = connect_to_host (conn->host, conn->port);
1667 return (retryable_socket_connect_error (errno)
1668 ? CONERROR : CONIMPOSSIBLE);
1672 if (proxy && u->scheme == SCHEME_HTTPS)
1674 /* When requesting SSL URLs through proxies, use the
1675 CONNECT method to request passthrough. */
1676 struct request *connreq = request_new ();
1677 request_set_method (connreq, "CONNECT",
1678 aprintf ("%s:%d", u->host, u->port));
1679 SET_USER_AGENT (connreq);
1682 request_set_header (connreq, "Proxy-Authorization",
1683 proxyauth, rel_value);
1684 /* Now that PROXYAUTH is part of the CONNECT request,
1685 zero it out so we don't send proxy authorization with
1686 the regular request below. */
1689 /* Examples in rfc2817 use the Host header in CONNECT
1690 requests. I don't see how that gains anything, given
1691 that the contents of Host would be exactly the same as
1692 the contents of CONNECT. */
1694 write_error = request_send (connreq, sock);
1695 request_free (connreq);
1696 if (write_error < 0)
1698 CLOSE_INVALIDATE (sock);
1702 head = read_http_response_head (sock);
1705 logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
1707 CLOSE_INVALIDATE (sock);
1716 DEBUGP (("proxy responded with: [%s]\n", head));
1718 resp = resp_new (head);
1719 statcode = resp_status (resp, &message);
1720 hs->message = xstrdup (message);
1723 if (statcode != 200)
1726 logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
1727 message ? quotearg_style (escape_quoting_style, message) : "?");
1728 xfree_null (message);
1731 xfree_null (message);
1733 /* SOCK is now *really* connected to u->host, so update CONN
1734 to reflect this. That way register_persistent will
1735 register SOCK as being connected to u->host:u->port. */
1739 if (conn->scheme == SCHEME_HTTPS)
1741 if (!ssl_connect (sock) || !ssl_check_certificate (sock, u->host))
1748 #endif /* HAVE_SSL */
1751 /* Send the request to server. */
1752 write_error = request_send (req, sock);
1754 if (write_error >= 0)
1758 DEBUGP (("[POST data: %s]\n", opt.post_data));
1759 write_error = fd_write (sock, opt.post_data, post_data_size, -1);
1761 else if (opt.post_file_name && post_data_size != 0)
1762 write_error = post_file (sock, opt.post_file_name, post_data_size);
1765 if (write_error < 0)
1767 CLOSE_INVALIDATE (sock);
1771 logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
1772 proxy ? "Proxy" : "HTTP");
1777 head = read_http_response_head (sock);
1782 logputs (LOG_NOTQUIET, _("No data received.\n"));
1783 CLOSE_INVALIDATE (sock);
1789 logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
1791 CLOSE_INVALIDATE (sock);
1796 DEBUGP (("\n---response begin---\n%s---response end---\n", head));
1798 resp = resp_new (head);
1800 /* Check for status line. */
1802 statcode = resp_status (resp, &message);
1803 hs->message = xstrdup (message);
1804 if (!opt.server_response)
1805 logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
1806 message ? quotearg_style (escape_quoting_style, message) : "");
1809 logprintf (LOG_VERBOSE, "\n");
1810 print_server_response (resp, " ");
1813 /* Determine the local filename if needed. Notice that if -O is used
1814 * hstat.local_file is set by http_loop to the argument of -O. */
1815 if (!hs->local_file)
1817 /* Honor Content-Disposition whether possible. */
1818 if (!opt.content_disposition
1819 || !resp_header_copy (resp, "Content-Disposition",
1820 hdrval, sizeof (hdrval))
1821 || !parse_content_disposition (hdrval, &hs->local_file))
1823 /* The Content-Disposition header is missing or broken.
1824 * Choose unique file name according to given URL. */
1825 hs->local_file = url_file_name (u);
1829 /* TODO: perform this check only once. */
1830 if (!hs->existence_checked && file_exists_p (hs->local_file))
1832 if (opt.noclobber && !opt.output_document)
1834 /* If opt.noclobber is turned on and file already exists, do not
1835 retrieve the file. But if the output_document was given, then this
1836 test was already done and the file didn't exist. Hence the !opt.output_document */
1837 logprintf (LOG_VERBOSE, _("\
1838 File %s already there; not retrieving.\n\n"), quote (hs->local_file));
1839 /* If the file is there, we suppose it's retrieved OK. */
1842 /* #### Bogusness alert. */
1843 /* If its suffix is "html" or "htm" or similar, assume text/html. */
1844 if (has_html_suffix_p (hs->local_file))
1847 return RETRUNNEEDED;
1849 else if (!ALLOW_CLOBBER)
1851 char *unique = unique_name (hs->local_file, true);
1852 if (unique != hs->local_file)
1853 xfree (hs->local_file);
1854 hs->local_file = unique;
1857 hs->existence_checked = true;
1859 /* Support timestamping */
1860 /* TODO: move this code out of gethttp. */
1861 if (opt.timestamping && !hs->timestamp_checked)
1863 size_t filename_len = strlen (hs->local_file);
1864 char *filename_plus_orig_suffix = alloca (filename_len + sizeof (".orig"));
1865 bool local_dot_orig_file_exists = false;
1866 char *local_filename = NULL;
1869 if (opt.backup_converted)
1870 /* If -K is specified, we'll act on the assumption that it was specified
1871 last time these files were downloaded as well, and instead of just
1872 comparing local file X against server file X, we'll compare local
1873 file X.orig (if extant, else X) against server file X. If -K
1874 _wasn't_ specified last time, or the server contains files called
1875 *.orig, -N will be back to not operating correctly with -k. */
1877 /* Would a single s[n]printf() call be faster? --dan
1879 Definitely not. sprintf() is horribly slow. It's a
1880 different question whether the difference between the two
1881 affects a program. Usually I'd say "no", but at one
1882 point I profiled Wget, and found that a measurable and
1883 non-negligible amount of time was lost calling sprintf()
1884 in url.c. Replacing sprintf with inline calls to
1885 strcpy() and number_to_string() made a difference.
1887 memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
1888 memcpy (filename_plus_orig_suffix + filename_len,
1889 ".orig", sizeof (".orig"));
1891 /* Try to stat() the .orig file. */
1892 if (stat (filename_plus_orig_suffix, &st) == 0)
1894 local_dot_orig_file_exists = true;
1895 local_filename = filename_plus_orig_suffix;
1899 if (!local_dot_orig_file_exists)
1900 /* Couldn't stat() <file>.orig, so try to stat() <file>. */
1901 if (stat (hs->local_file, &st) == 0)
1902 local_filename = hs->local_file;
1904 if (local_filename != NULL)
1905 /* There was a local file, so we'll check later to see if the version
1906 the server has is the same version we already have, allowing us to
1909 hs->orig_file_name = xstrdup (local_filename);
1910 hs->orig_file_size = st.st_size;
1911 hs->orig_file_tstamp = st.st_mtime;
1913 /* Modification time granularity is 2 seconds for Windows, so
1914 increase local time by 1 second for later comparison. */
1915 ++hs->orig_file_tstamp;
1920 if (!opt.ignore_length
1921 && resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
1925 parsed = str_to_wgint (hdrval, NULL, 10);
1926 if (parsed == WGINT_MAX && errno == ERANGE)
1929 #### If Content-Length is out of range, it most likely
1930 means that the file is larger than 2G and that we're
1931 compiled without LFS. In that case we should probably
1932 refuse to even attempt to download the file. */
1935 else if (parsed < 0)
1937 /* Negative Content-Length; nonsensical, so we can't
1938 assume any information about the content to receive. */
1945 /* Check for keep-alive related responses. */
1946 if (!inhibit_keep_alive && contlen != -1)
1948 if (resp_header_copy (resp, "Keep-Alive", NULL, 0))
1950 else if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
1952 if (0 == strcasecmp (hdrval, "Keep-Alive"))
1957 /* The server has promised that it will not close the connection
1958 when we're done. This means that we can register it. */
1959 register_persistent (conn->host, conn->port, sock, using_ssl);
1961 if (statcode == HTTP_STATUS_UNAUTHORIZED)
1963 /* Authorization is required. */
1964 if (keep_alive && !head_only && skip_short_body (sock, contlen))
1965 CLOSE_FINISH (sock);
1967 CLOSE_INVALIDATE (sock);
1968 pconn.authorized = false;
1969 if (!auth_finished && (user && passwd))
1971 /* IIS sends multiple copies of WWW-Authenticate, one with
1972 the value "negotiate", and other(s) with data. Loop over
1973 all the occurrences and pick the one we recognize. */
1975 const char *wabeg, *waend;
1976 char *www_authenticate = NULL;
1978 (wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
1979 &wabeg, &waend)) != -1;
1981 if (known_authentication_scheme_p (wabeg, waend))
1983 BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
1987 if (!www_authenticate)
1989 /* If the authentication header is missing or
1990 unrecognized, there's no sense in retrying. */
1991 logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
1993 else if (!basic_auth_finished
1994 || !BEGINS_WITH (www_authenticate, "Basic"))
1997 pth = url_full_path (u);
1998 request_set_header (req, "Authorization",
1999 create_authorization_line (www_authenticate,
2001 request_method (req),
2005 if (BEGINS_WITH (www_authenticate, "NTLM"))
2007 else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
2009 /* Need to register this host as using basic auth,
2010 * so we automatically send creds next time. */
2011 register_basic_auth_host (u->host);
2014 goto retry_with_auth;
2018 /* We already did Basic auth, and it failed. Gotta
2022 logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
2026 else /* statcode != HTTP_STATUS_UNAUTHORIZED */
2028 /* Kludge: if NTLM is used, mark the TCP connection as authorized. */
2030 pconn.authorized = true;
2034 hs->statcode = statcode;
2036 hs->error = xstrdup (_("Malformed status line"));
2038 hs->error = xstrdup (_("(no description)"));
2040 hs->error = xstrdup (message);
2041 xfree_null (message);
2043 type = resp_header_strdup (resp, "Content-Type");
2046 char *tmp = strchr (type, ';');
2049 /* sXXXav: only needed if IRI support is enabled */
2050 char *tmp2 = tmp + 1;
2052 while (tmp > type && c_isspace (tmp[-1]))
2056 /* Try to get remote encoding if needed */
2057 if (opt.enable_iri && !opt.encoding_remote)
2058 set_current_charset (parse_charset (tmp2));
2061 hs->newloc = resp_header_strdup (resp, "Location");
2062 hs->remote_time = resp_header_strdup (resp, "Last-Modified");
2064 /* Handle (possibly multiple instances of) the Set-Cookie header. */
2068 const char *scbeg, *scend;
2069 /* The jar should have been created by now. */
2070 assert (wget_cookie_jar != NULL);
2072 (scpos = resp_header_locate (resp, "Set-Cookie", scpos,
2073 &scbeg, &scend)) != -1;
2076 char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
2077 cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
2078 u->path, set_cookie);
2082 if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
2084 wgint first_byte_pos, last_byte_pos, entity_length;
2085 if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
2088 contrange = first_byte_pos;
2089 contlen = last_byte_pos - first_byte_pos + 1;
2094 /* 20x responses are counted among successful by default. */
2095 if (H_20X (statcode))
2098 /* Return if redirected. */
2099 if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
2101 /* RFC2068 says that in case of the 300 (multiple choices)
2102 response, the server can output a preferred URL through
2103 `Location' header; otherwise, the request should be treated
2104 like GET. So, if the location is set, it will be a
2105 redirection; otherwise, just proceed normally. */
2106 if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
2110 logprintf (LOG_VERBOSE,
2111 _("Location: %s%s\n"),
2112 hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
2113 hs->newloc ? _(" [following]") : "");
2114 if (keep_alive && !head_only && skip_short_body (sock, contlen))
2115 CLOSE_FINISH (sock);
2117 CLOSE_INVALIDATE (sock);
2123 /* If content-type is not given, assume text/html. This is because
2124 of the multitude of broken CGI's that "forget" to generate the
2127 0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
2128 0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
2133 if (opt.html_extension && (*dt & TEXTHTML))
2134 /* -E / --html-extension / html_extension = on was specified, and this is a
2135 text/html file. If some case-insensitive variation on ".htm[l]" isn't
2136 already the file's suffix, tack on ".html". */
2138 char *last_period_in_local_filename = strrchr (hs->local_file, '.');
2140 if (last_period_in_local_filename == NULL
2141 || !(0 == strcasecmp (last_period_in_local_filename, ".htm")
2142 || 0 == strcasecmp (last_period_in_local_filename, ".html")))
2144 int local_filename_len = strlen (hs->local_file);
2145 /* Resize the local file, allowing for ".html" preceded by
2146 optional ".NUMBER". */
2147 hs->local_file = xrealloc (hs->local_file,
2148 local_filename_len + 24 + sizeof (".html"));
2149 strcpy(hs->local_file + local_filename_len, ".html");
2150 /* If clobbering is not allowed and the file, as named,
2151 exists, tack on ".NUMBER.html" instead. */
2152 if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
2156 sprintf (hs->local_file + local_filename_len,
2157 ".%d.html", ext_num++);
2158 while (file_exists_p (hs->local_file));
2160 *dt |= ADDED_HTML_EXTENSION;
2164 if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
2166 /* If `-c' is in use and the file has been fully downloaded (or
2167 the remote file has shrunk), Wget effectively requests bytes
2168 after the end of file and the server response with 416. */
2169 logputs (LOG_VERBOSE, _("\
2170 \n The file is already fully retrieved; nothing to do.\n\n"));
2171 /* In case the caller inspects. */
2174 /* Mark as successfully retrieved. */
2177 CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
2178 might be more bytes in the body. */
2179 return RETRUNNEEDED;
2181 if ((contrange != 0 && contrange != hs->restval)
2182 || (H_PARTIAL (statcode) && !contrange))
2184 /* The Range request was somehow misunderstood by the server.
2187 CLOSE_INVALIDATE (sock);
2193 hs->contlen = contlen + contrange;
2199 /* No need to print this output if the body won't be
2200 downloaded at all, or if the original server response is
2202 logputs (LOG_VERBOSE, _("Length: "));
2205 logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
2206 if (contlen + contrange >= 1024)
2207 logprintf (LOG_VERBOSE, " (%s)",
2208 human_readable (contlen + contrange));
2211 if (contlen >= 1024)
2212 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
2213 number_to_static_string (contlen),
2214 human_readable (contlen));
2216 logprintf (LOG_VERBOSE, _(", %s remaining"),
2217 number_to_static_string (contlen));
2221 logputs (LOG_VERBOSE,
2222 opt.ignore_length ? _("ignored") : _("unspecified"));
2224 logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
2226 logputs (LOG_VERBOSE, "\n");
2230 type = NULL; /* We don't need it any more. */
2232 /* Return if we have no intention of further downloading. */
2233 if (!(*dt & RETROKF) || head_only)
2235 /* In case the caller cares to look... */
2240 /* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
2241 servers not to send body in response to a HEAD request, and
2242 those that do will likely be caught by test_socket_open.
2243 If not, they can be worked around using
2244 `--no-http-keep-alive'. */
2245 CLOSE_FINISH (sock);
2246 else if (keep_alive && skip_short_body (sock, contlen))
2247 /* Successfully skipped the body; also keep using the socket. */
2248 CLOSE_FINISH (sock);
2250 CLOSE_INVALIDATE (sock);
2251 return RETRFINISHED;
2254 /* Open the local file. */
2257 mkalldirs (hs->local_file);
2259 rotate_backups (hs->local_file);
2261 fp = fopen (hs->local_file, "ab");
2262 else if (ALLOW_CLOBBER)
2263 fp = fopen (hs->local_file, "wb");
2266 fp = fopen_excl (hs->local_file, true);
2267 if (!fp && errno == EEXIST)
2269 /* We cannot just invent a new name and use it (which is
2270 what functions like unique_create typically do)
2271 because we told the user we'd use this name.
2272 Instead, return and retry the download. */
2273 logprintf (LOG_NOTQUIET,
2274 _("%s has sprung into existence.\n"),
2276 CLOSE_INVALIDATE (sock);
2277 return FOPEN_EXCL_ERR;
2282 logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
2283 CLOSE_INVALIDATE (sock);
2290 /* Print fetch message, if opt.verbose. */
2293 logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
2294 HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
2297 /* This confuses the timestamping code that checks for file size.
2298 #### The timestamping code should be smarter about file size. */
2299 if (opt.save_headers && hs->restval == 0)
2300 fwrite (head, 1, strlen (head), fp);
2302 /* Now we no longer need to store the response header. */
2305 /* Download the request body. */
2308 /* If content-length is present, read that much; otherwise, read
2309 until EOF. The HTTP spec doesn't require the server to
2310 actually close the connection when it's done sending data. */
2311 flags |= rb_read_exactly;
2312 if (hs->restval > 0 && contrange == 0)
2313 /* If the server ignored our range request, instruct fd_read_body
2314 to skip the first RESTVAL bytes of body. */
2315 flags |= rb_skip_startpos;
2316 hs->len = hs->restval;
2318 hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
2319 hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
2323 CLOSE_FINISH (sock);
2327 hs->rderrmsg = xstrdup (fd_errstr (sock));
2328 CLOSE_INVALIDATE (sock);
2335 return RETRFINISHED;
2338 /* The genuine HTTP loop! This is the part where the retrieval is
2339 retried, and retried, and retried, and... */
2341 http_loop (struct url *u, char **newloc, char **local_file, const char *referer,
2342 int *dt, struct url *proxy)
2345 bool got_head = false; /* used for time-stamping and filename detection */
2346 bool time_came_from_head = false;
2347 bool got_name = false;
2350 uerr_t err, ret = TRYLIMEXC;
2351 time_t tmr = -1; /* remote time-stamp */
2352 struct http_stat hstat; /* HTTP status */
2354 bool send_head_first = true;
2356 /* Assert that no value for *LOCAL_FILE was passed. */
2357 assert (local_file == NULL || *local_file == NULL);
2359 /* Set LOCAL_FILE parameter. */
2360 if (local_file && opt.output_document)
2361 *local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
2363 /* Reset NEWLOC parameter. */
2366 /* This used to be done in main(), but it's a better idea to do it
2367 here so that we don't go through the hoops if we're just using
2372 /* Warn on (likely bogus) wildcard usage in HTTP. */
2373 if (opt.ftp_glob && has_wildcards_p (u->path))
2374 logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
2376 /* Setup hstat struct. */
2378 hstat.referer = referer;
2380 if (opt.output_document)
2382 hstat.local_file = xstrdup (opt.output_document);
2385 else if (!opt.content_disposition)
2387 hstat.local_file = url_file_name (u);
2391 /* TODO: Ick! This code is now in both gethttp and http_loop, and is
2392 * screaming for some refactoring. */
2393 if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
2395 /* If opt.noclobber is turned on and file already exists, do not
2396 retrieve the file. But if the output_document was given, then this
2397 test was already done and the file didn't exist. Hence the !opt.output_document */
2398 logprintf (LOG_VERBOSE, _("\
2399 File %s already there; not retrieving.\n\n"),
2400 quote (hstat.local_file));
2401 /* If the file is there, we suppose it's retrieved OK. */
2404 /* #### Bogusness alert. */
2405 /* If its suffix is "html" or "htm" or similar, assume text/html. */
2406 if (has_html_suffix_p (hstat.local_file))
2413 /* Reset the counter. */
2416 /* Reset the document type. */
2419 /* Skip preliminary HEAD request if we're not in spider mode AND
2420 * if -O was given or HTTP Content-Disposition support is disabled. */
2422 && (got_name || !opt.content_disposition))
2423 send_head_first = false;
2425 /* Send preliminary HEAD request if -N is given and we have an existing
2426 * destination file. */
2427 if (opt.timestamping
2428 && !opt.content_disposition
2429 && file_exists_p (url_file_name (u)))
2430 send_head_first = true;
2435 /* Increment the pass counter. */
2437 sleep_between_retrievals (count);
2439 /* Get the current time string. */
2440 tms = datetime_str (time (NULL));
2442 if (opt.spider && !got_head)
2443 logprintf (LOG_VERBOSE, _("\
2444 Spider mode enabled. Check if remote file exists.\n"));
2446 /* Print fetch message, if opt.verbose. */
2449 char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2454 sprintf (tmp, _("(try:%2d)"), count);
2455 logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
2460 logprintf (LOG_NOTQUIET, "--%s-- %s\n",
2465 ws_changetitle (hurl);
2470 /* Default document type is empty. However, if spider mode is
2471 on or time-stamping is employed, HEAD_ONLY commands is
2472 encoded within *dt. */
2473 if (send_head_first && !got_head)
2478 /* Decide whether or not to restart. */
2481 && stat (hstat.local_file, &st) == 0
2482 && S_ISREG (st.st_mode))
2483 /* When -c is used, continue from on-disk size. (Can't use
2484 hstat.len even if count>1 because we don't want a failed
2485 first attempt to clobber existing data.) */
2486 hstat.restval = st.st_size;
2488 /* otherwise, continue where the previous try left off */
2489 hstat.restval = hstat.len;
2493 /* Decide whether to send the no-cache directive. We send it in
2495 a) we're using a proxy, and we're past our first retrieval.
2496 Some proxies are notorious for caching incomplete data, so
2497 we require a fresh get.
2498 b) caching is explicitly inhibited. */
2499 if ((proxy && count > 1) /* a */
2500 || !opt.allow_cache) /* b */
2501 *dt |= SEND_NOCACHE;
2503 *dt &= ~SEND_NOCACHE;
2505 /* Try fetching the document, or at least its head. */
2506 err = gethttp (u, &hstat, dt, proxy);
2509 tms = datetime_str (time (NULL));
2511 /* Get the new location (with or without the redirection). */
2513 *newloc = xstrdup (hstat.newloc);
2517 case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
2518 case CONERROR: case READERR: case WRITEFAILED:
2519 case RANGEERR: case FOPEN_EXCL_ERR:
2520 /* Non-fatal errors continue executing the loop, which will
2521 bring them to "while" statement at the end, to judge
2522 whether the number of tries was exceeded. */
2523 printwhat (count, opt.ntry);
2525 case FWRITEERR: case FOPENERR:
2526 /* Another fatal error. */
2527 logputs (LOG_VERBOSE, "\n");
2528 logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
2529 quote (hstat.local_file), strerror (errno));
2530 case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
2531 case SSLINITFAILED: case CONTNOTSUPPORTED:
2532 /* Fatal errors just return from the function. */
2536 /* Another fatal error. */
2537 logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
2541 /* Return the new location to the caller. */
2544 logprintf (LOG_NOTQUIET,
2545 _("ERROR: Redirection (%d) without location.\n"),
2555 /* The file was already fully retrieved. */
2559 /* Deal with you later. */
2562 /* All possibilities should have been exhausted. */
2566 if (!(*dt & RETROKF))
2571 /* #### Ugly ugly ugly! */
2572 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2573 logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
2576 /* Fall back to GET if HEAD fails with a 500 or 501 error code. */
2578 && (hstat.statcode == 500 || hstat.statcode == 501))
2583 /* Maybe we should always keep track of broken links, not just in
2585 * Don't log error if it was utf8 encoded because we will try
2587 else if (opt.spider && !get_utf8_encode ())
2589 /* #### Again: ugly ugly ugly! */
2591 hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
2592 nonexisting_url (hurl);
2593 logprintf (LOG_NOTQUIET, _("\
2594 Remote file does not exist -- broken link!!!\n"));
2598 logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
2599 tms, hstat.statcode,
2600 quotearg_style (escape_quoting_style, hstat.error));
2602 logputs (LOG_VERBOSE, "\n");
2608 /* Did we get the time-stamp? */
2611 got_head = true; /* no more time-stamping */
2613 if (opt.timestamping && !hstat.remote_time)
2615 logputs (LOG_NOTQUIET, _("\
2616 Last-modified header missing -- time-stamps turned off.\n"));
2618 else if (hstat.remote_time)
2620 /* Convert the date-string into struct tm. */
2621 tmr = http_atotm (hstat.remote_time);
2622 if (tmr == (time_t) (-1))
2623 logputs (LOG_VERBOSE, _("\
2624 Last-modified header invalid -- time-stamp ignored.\n"));
2625 if (*dt & HEAD_ONLY)
2626 time_came_from_head = true;
2629 if (send_head_first)
2631 /* The time-stamping section. */
2632 if (opt.timestamping)
2634 if (hstat.orig_file_name) /* Perform the following
2635 checks only if the file
2637 download already exists. */
2639 if (hstat.remote_time &&
2640 tmr != (time_t) (-1))
2642 /* Now time-stamping can be used validly.
2643 Time-stamping means that if the sizes of
2644 the local and remote file match, and local
2645 file is newer than the remote file, it will
2646 not be retrieved. Otherwise, the normal
2647 download procedure is resumed. */
2648 if (hstat.orig_file_tstamp >= tmr)
2650 if (hstat.contlen == -1
2651 || hstat.orig_file_size == hstat.contlen)
2653 logprintf (LOG_VERBOSE, _("\
2654 Server file no newer than local file %s -- not retrieving.\n\n"),
2655 quote (hstat.orig_file_name));
2661 logprintf (LOG_VERBOSE, _("\
2662 The sizes do not match (local %s) -- retrieving.\n"),
2663 number_to_static_string (hstat.orig_file_size));
2667 logputs (LOG_VERBOSE,
2668 _("Remote file is newer, retrieving.\n"));
2670 logputs (LOG_VERBOSE, "\n");
2674 /* free_hstat (&hstat); */
2675 hstat.timestamp_checked = true;
2680 bool finished = true;
2685 logputs (LOG_VERBOSE, _("\
2686 Remote file exists and could contain links to other resources -- retrieving.\n\n"));
2691 logprintf (LOG_VERBOSE, _("\
2692 Remote file exists but does not contain any link -- not retrieving.\n\n"));
2693 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2700 logprintf (LOG_VERBOSE, _("\
2701 Remote file exists and could contain further links,\n\
2702 but recursion is disabled -- not retrieving.\n\n"));
2706 logprintf (LOG_VERBOSE, _("\
2707 Remote file exists.\n\n"));
2709 ret = RETROK; /* RETRUNNEEDED is not for caller. */
2714 logprintf (LOG_NONVERBOSE,
2715 _("%s URL:%s %2d %s\n"),
2716 tms, u->url, hstat.statcode,
2717 hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
2724 count = 0; /* the retrieve count for HEAD is reset */
2726 } /* send_head_first */
2729 if ((tmr != (time_t) (-1))
2730 && ((hstat.len == hstat.contlen) ||
2731 ((hstat.res == 0) && (hstat.contlen == -1))))
2733 /* #### This code repeats in http.c and ftp.c. Move it to a
2735 const char *fl = NULL;
2736 if (opt.output_document)
2738 if (output_stream_regular)
2739 fl = opt.output_document;
2742 fl = hstat.local_file;
2746 /* Reparse time header, in case it's changed. */
2747 if (time_came_from_head
2748 && hstat.remote_time && hstat.remote_time[0])
2750 newtmr = http_atotm (hstat.remote_time);
2757 /* End of time-stamping section. */
2759 tmrate = retr_rate (hstat.rd_size, hstat.dltime);
2760 total_download_time += hstat.dltime;
2762 if (hstat.len == hstat.contlen)
2766 logprintf (LOG_VERBOSE,
2767 _("%s (%s) - %s saved [%s/%s]\n\n"),
2768 tms, tmrate, quote (hstat.local_file),
2769 number_to_static_string (hstat.len),
2770 number_to_static_string (hstat.contlen));
2771 logprintf (LOG_NONVERBOSE,
2772 "%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
2774 number_to_static_string (hstat.len),
2775 number_to_static_string (hstat.contlen),
2776 hstat.local_file, count);
2779 total_downloaded_bytes += hstat.len;
2781 /* Remember that we downloaded the file for later ".orig" code. */
2782 if (*dt & ADDED_HTML_EXTENSION)
2783 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2785 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2790 else if (hstat.res == 0) /* No read error */
2792 if (hstat.contlen == -1) /* We don't know how much we were supposed
2793 to get, so assume we succeeded. */
2797 logprintf (LOG_VERBOSE,
2798 _("%s (%s) - %s saved [%s]\n\n"),
2799 tms, tmrate, quote (hstat.local_file),
2800 number_to_static_string (hstat.len));
2801 logprintf (LOG_NONVERBOSE,
2802 "%s URL:%s [%s] -> \"%s\" [%d]\n",
2803 tms, u->url, number_to_static_string (hstat.len),
2804 hstat.local_file, count);
2807 total_downloaded_bytes += hstat.len;
2809 /* Remember that we downloaded the file for later ".orig" code. */
2810 if (*dt & ADDED_HTML_EXTENSION)
2811 downloaded_file(FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
2813 downloaded_file(FILE_DOWNLOADED_NORMALLY, hstat.local_file);
2818 else if (hstat.len < hstat.contlen) /* meaning we lost the
2819 connection too soon */
2821 logprintf (LOG_VERBOSE,
2822 _("%s (%s) - Connection closed at byte %s. "),
2823 tms, tmrate, number_to_static_string (hstat.len));
2824 printwhat (count, opt.ntry);
2827 else if (hstat.len != hstat.restval)
2828 /* Getting here would mean reading more data than
2829 requested with content-length, which we never do. */
2833 /* Getting here probably means that the content-length was
2834 * _less_ than the original, local size. We should probably
2835 * truncate or re-read, or something. FIXME */
2840 else /* from now on hstat.res can only be -1 */
2842 if (hstat.contlen == -1)
2844 logprintf (LOG_VERBOSE,
2845 _("%s (%s) - Read error at byte %s (%s)."),
2846 tms, tmrate, number_to_static_string (hstat.len),
2848 printwhat (count, opt.ntry);
2851 else /* hstat.res == -1 and contlen is given */
2853 logprintf (LOG_VERBOSE,
2854 _("%s (%s) - Read error at byte %s/%s (%s). "),
2856 number_to_static_string (hstat.len),
2857 number_to_static_string (hstat.contlen),
2859 printwhat (count, opt.ntry);
2865 while (!opt.ntry || (count < opt.ntry));
2869 *local_file = xstrdup (hstat.local_file);
2870 free_hstat (&hstat);
2875 /* Check whether the result of strptime() indicates success.
2876 strptime() returns the pointer to how far it got to in the string.
2877 The processing has been successful if the string is at `GMT' or
2878 `+X', or at the end of the string.
2880 In extended regexp parlance, the function returns 1 if P matches
2881 "^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
2882 can return) is considered a failure and 0 is returned. */
2884 check_end (const char *p)
2888 while (c_isspace (*p))
2891 || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
2892 || ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
2898 /* Convert the textual specification of time in TIME_STRING to the
2899 number of seconds since the Epoch.
2901 TIME_STRING can be in any of the three formats RFC2616 allows the
2902 HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
2903 as well as the time format used in the Set-Cookie header.
2904 Timezones are ignored, and should be GMT.
2906 Return the computed time_t representation, or -1 if the conversion
2909 This function uses strptime with various string formats for parsing
2910 TIME_STRING. This results in a parser that is not as lenient in
2911 interpreting TIME_STRING as I would like it to be. Being based on
2912 strptime, it always allows shortened months, one-digit days, etc.,
2913 but due to the multitude of formats in which time can be
2914 represented, an ideal HTTP time parser would be even more
2915 forgiving. It should completely ignore things like week days and
2916 concentrate only on the various forms of representing years,
2917 months, days, hours, minutes, and seconds. For example, it would
2918 be nice if it accepted ISO 8601 out of the box.
2920 I've investigated free and PD code for this purpose, but none was
2921 usable. getdate was big and unwieldy, and had potential copyright
2922 issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
2923 distributed with phttpd, is excellent, but we cannot use it because
2924 it is not assigned to the FSF. So I stuck it with strptime. */
2927 http_atotm (const char *time_string)
2929 /* NOTE: Solaris strptime man page claims that %n and %t match white
2930 space, but that's not universally available. Instead, we simply
2931 use ` ' to mean "skip all WS", which works under all strptime
2932 implementations I've tested. */
2934 static const char *time_formats[] = {
2935 "%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
2936 "%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
2937 "%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
2938 "%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
2939 (used in Set-Cookie, defined in the
2940 Netscape cookie specification.) */
2942 const char *oldlocale;
2944 time_t ret = (time_t) -1;
2946 /* Solaris strptime fails to recognize English month names in
2947 non-English locales, which we work around by temporarily setting
2948 locale to C before invoking strptime. */
2949 oldlocale = setlocale (LC_TIME, NULL);
2950 setlocale (LC_TIME, "C");
2952 for (i = 0; i < countof (time_formats); i++)
2956 /* Some versions of strptime use the existing contents of struct
2957 tm to recalculate the date according to format. Zero it out
2958 to prevent stack garbage from influencing strptime. */
2961 if (check_end (strptime (time_string, time_formats[i], &t)))
2968 /* Restore the previous locale. */
2969 setlocale (LC_TIME, oldlocale);
2974 /* Authorization support: We support three authorization schemes:
2976 * `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
2978 * `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
2979 consisting of answering to the server's challenge with the proper
2982 * `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
2983 Stenberg for libcurl. Like digest, NTLM is based on a
2984 challenge-response mechanism, but unlike digest, it is non-standard
2985 (authenticates TCP connections rather than requests), undocumented
2986 and Microsoft-specific. */
2988 /* Create the authentication header contents for the `Basic' scheme.
2989 This is done by encoding the string "USER:PASS" to base64 and
2990 prepending the string "Basic " in front of it. */
2993 basic_authentication_encode (const char *user, const char *passwd)
2996 int len1 = strlen (user) + 1 + strlen (passwd);
2998 t1 = (char *)alloca (len1 + 1);
2999 sprintf (t1, "%s:%s", user, passwd);
3001 t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
3002 base64_encode (t1, len1, t2);
3004 return concat_strings ("Basic ", t2, (char *) 0);
3007 #define SKIP_WS(x) do { \
3008 while (c_isspace (*(x))) \
3012 #ifdef ENABLE_DIGEST
3013 /* Dump the hexadecimal representation of HASH to BUF. HASH should be
3014 an array of 16 bytes containing the hash keys, and BUF should be a
3015 buffer of 33 writable characters (32 for hex digits plus one for
3016 zero termination). */
3018 dump_hash (char *buf, const unsigned char *hash)
3022 for (i = 0; i < MD5_HASHLEN; i++, hash++)
3024 *buf++ = XNUM_TO_digit (*hash >> 4);
3025 *buf++ = XNUM_TO_digit (*hash & 0xf);
3030 /* Take the line apart to find the challenge, and compose a digest
3031 authorization header. See RFC2069 section 2.1.2. */
3033 digest_authentication_encode (const char *au, const char *user,
3034 const char *passwd, const char *method,
3037 static char *realm, *opaque, *nonce;
3042 { "realm", &realm },
3043 { "opaque", &opaque },
3047 param_token name, value;
3049 realm = opaque = nonce = NULL;
3051 au += 6; /* skip over `Digest' */
3052 while (extract_param (&au, &name, &value, ','))
3055 size_t namelen = name.e - name.b;
3056 for (i = 0; i < countof (options); i++)
3057 if (namelen == strlen (options[i].name)
3058 && 0 == strncmp (name.b, options[i].name,
3061 *options[i].variable = strdupdelim (value.b, value.e);
3065 if (!realm || !nonce || !user || !passwd || !path || !method)
3068 xfree_null (opaque);
3073 /* Calculate the digest value. */
3075 ALLOCA_MD5_CONTEXT (ctx);
3076 unsigned char hash[MD5_HASHLEN];
3077 char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
3078 char response_digest[MD5_HASHLEN * 2 + 1];
3080 /* A1BUF = H(user ":" realm ":" password) */
3082 gen_md5_update ((unsigned char *)user, strlen (user), ctx);
3083 gen_md5_update ((unsigned char *)":", 1, ctx);
3084 gen_md5_update ((unsigned char *)realm, strlen (realm), ctx);
3085 gen_md5_update ((unsigned char *)":", 1, ctx);
3086 gen_md5_update ((unsigned char *)passwd, strlen (passwd), ctx);
3087 gen_md5_finish (ctx, hash);
3088 dump_hash (a1buf, hash);
3090 /* A2BUF = H(method ":" path) */
3092 gen_md5_update ((unsigned char *)method, strlen (method), ctx);
3093 gen_md5_update ((unsigned char *)":", 1, ctx);
3094 gen_md5_update ((unsigned char *)path, strlen (path), ctx);
3095 gen_md5_finish (ctx, hash);
3096 dump_hash (a2buf, hash);
3098 /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
3100 gen_md5_update ((unsigned char *)a1buf, MD5_HASHLEN * 2, ctx);
3101 gen_md5_update ((unsigned char *)":", 1, ctx);
3102 gen_md5_update ((unsigned char *)nonce, strlen (nonce), ctx);
3103 gen_md5_update ((unsigned char *)":", 1, ctx);
3104 gen_md5_update ((unsigned char *)a2buf, MD5_HASHLEN * 2, ctx);
3105 gen_md5_finish (ctx, hash);
3106 dump_hash (response_digest, hash);
3108 res = xmalloc (strlen (user)
3113 + 2 * MD5_HASHLEN /*strlen (response_digest)*/
3114 + (opaque ? strlen (opaque) : 0)
3116 sprintf (res, "Digest \
3117 username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
3118 user, realm, nonce, path, response_digest);
3121 char *p = res + strlen (res);
3122 strcat (p, ", opaque=\"");
3129 #endif /* ENABLE_DIGEST */
3131 /* Computing the size of a string literal must take into account that
3132 value returned by sizeof includes the terminating \0. */
3133 #define STRSIZE(literal) (sizeof (literal) - 1)
3135 /* Whether chars in [b, e) begin with the literal string provided as
3136 first argument and are followed by whitespace or terminating \0.
3137 The comparison is case-insensitive. */
3138 #define STARTS(literal, b, e) \
3140 && ((size_t) ((e) - (b))) >= STRSIZE (literal) \
3141 && 0 == strncasecmp (b, literal, STRSIZE (literal)) \
3142 && ((size_t) ((e) - (b)) == STRSIZE (literal) \
3143 || c_isspace (b[STRSIZE (literal)])))
3146 known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
3148 return STARTS ("Basic", hdrbeg, hdrend)
3149 #ifdef ENABLE_DIGEST
3150 || STARTS ("Digest", hdrbeg, hdrend)
3153 || STARTS ("NTLM", hdrbeg, hdrend)
3160 /* Create the HTTP authorization request header. When the
3161 `WWW-Authenticate' response header is seen, according to the
3162 authorization scheme specified in that header (`Basic' and `Digest'
3163 are supported by the current implementation), produce an
3164 appropriate HTTP authorization request header. */
3166 create_authorization_line (const char *au, const char *user,
3167 const char *passwd, const char *method,
3168 const char *path, bool *finished)
3170 /* We are called only with known schemes, so we can dispatch on the
3172 switch (c_toupper (*au))
3174 case 'B': /* Basic */
3176 return basic_authentication_encode (user, passwd);
3177 #ifdef ENABLE_DIGEST
3178 case 'D': /* Digest */
3180 return digest_authentication_encode (au, user, passwd, method, path);
3183 case 'N': /* NTLM */
3184 if (!ntlm_input (&pconn.ntlm, au))
3189 return ntlm_output (&pconn.ntlm, user, passwd, finished);
3192 /* We shouldn't get here -- this function should be only called
3193 with values approved by known_authentication_scheme_p. */
3201 if (!wget_cookie_jar)
3202 wget_cookie_jar = cookie_jar_new ();
3203 if (opt.cookies_input && !cookies_loaded_p)
3205 cookie_jar_load (wget_cookie_jar, opt.cookies_input);
3206 cookies_loaded_p = true;
3213 if (wget_cookie_jar)
3214 cookie_jar_save (wget_cookie_jar, opt.cookies_output);
3220 xfree_null (pconn.host);
3221 if (wget_cookie_jar)
3222 cookie_jar_delete (wget_cookie_jar);
3229 test_parse_content_disposition()
3234 char *opt_dir_prefix;
3238 { "filename=\"file.ext\"", NULL, "file.ext", true },
3239 { "filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3240 { "attachment; filename=\"file.ext\"", NULL, "file.ext", true },
3241 { "attachment; filename=\"file.ext\"", "somedir", "somedir/file.ext", true },
3242 { "attachment; filename=\"file.ext\"; dummy", NULL, "file.ext", true },
3243 { "attachment; filename=\"file.ext\"; dummy", "somedir", "somedir/file.ext", true },
3244 { "attachment", NULL, NULL, false },
3245 { "attachment", "somedir", NULL, false },
3248 for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
3253 opt.dir_prefix = test_array[i].opt_dir_prefix;
3254 res = parse_content_disposition (test_array[i].hdrval, &filename);
3256 mu_assert ("test_parse_content_disposition: wrong result",
3257 res == test_array[i].result
3259 || 0 == strcmp (test_array[i].filename, filename)));
3265 #endif /* TESTING */
3268 * vim: et sts=2 sw=2 cino+={s