+2003-09-22 Hrvoje Niksic <hniksic@xemacs.org>
+
+ * retr.c (getproxy): Moved from url.c.
+
+ * convert.c: Split off link conversion from url.c into separate
+ file. Also included the book-keeping stuff from recur.c.
+
2003-09-21 Hrvoje Niksic <hniksic@xemacs.org>
* init.c: Improved documentation of functions.
SSL_OBJ = @SSL_OBJ@
GETOPT_OBJ = @GETOPT_OBJ@
-OBJ = $(ALLOCA) cmpt$o connect$o cookies$o fnmatch$o ftp$o \
- ftp-basic$o ftp-ls$o $(OPIE_OBJ) $(GETOPT_OBJ) hash$o \
+OBJ = $(ALLOCA) cmpt$o connect$o convert$o cookies$o fnmatch$o \
+ ftp$o ftp-basic$o ftp-ls$o $(OPIE_OBJ) $(GETOPT_OBJ) hash$o \
headers$o host$o html-parse$o html-url$o http$o init$o \
log$o main$o $(MD5_OBJ) netrc$o progress$o rbuf$o recur$o \
res$o retr$o safe-ctype$o snprintf$o $(SSL_OBJ) url$o \
alloca$o:
cmpt$o: wget.h sysdep.h options.h safe-ctype.h
connect$o: wget.h sysdep.h options.h safe-ctype.h utils.h connect.h host.h
+convert$o: wget.h convert.h url.h recur.h utils.h hash.h
cookies$o: wget.h sysdep.h options.h safe-ctype.h cookies.h hash.h url.h utils.h
fnmatch$o: wget.h sysdep.h options.h safe-ctype.h fnmatch.h
ftp-basic$o: wget.h sysdep.h options.h safe-ctype.h utils.h rbuf.h connect.h \
--- /dev/null
+/* Conversion of links to local files.
+ Copyright (C) 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
+
+This file is part of GNU Wget.
+
+GNU Wget is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+GNU Wget is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Wget; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+In addition, as a special exception, the Free Software Foundation
+gives permission to link the code of its release of Wget with the
+OpenSSL project's "OpenSSL" library (or with modified versions of it
+that use the same license as the "OpenSSL" library), and distribute
+the linked executables. You must obey the GNU General Public License
+in all respects for all of the code used other than "OpenSSL". If you
+modify this file, you may extend this exception to your version of the
+file, but you are not obligated to do so. If you do not wish to do
+so, delete this exception statement from your version. */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <errno.h>
+#include <assert.h>
+#include <sys/types.h>
+
+#include "wget.h"
+#include "convert.h"
+#include "url.h"
+#include "recur.h"
+#include "utils.h"
+#include "hash.h"
+
+static struct hash_table *dl_file_url_map;
+struct hash_table *dl_url_file_map;
+
+/* List of HTML files downloaded in this Wget run, used for link
+ conversion after Wget is done. The list and the set contain the
+ same information, except the list maintains the order. Perhaps I
+ should get rid of the list, it's there for historical reasons. */
+static slist *downloaded_html_list;
+struct hash_table *downloaded_html_set;
+
+static void convert_links PARAMS ((const char *, struct urlpos *));
+
+/* This function is called when the retrieval is done to convert the
+ links that have been downloaded. It has to be called at the end of
+ the retrieval, because only then does Wget know conclusively which
+ URLs have been downloaded, and which not, so it can tell which
+ direction to convert to.
+
+ The "direction" means that the URLs to the files that have been
+ downloaded get converted to the relative URL which will point to
+ that file. And the other URLs get converted to the remote URL on
+ the server.
+
+ All the downloaded HTMLs are kept in downloaded_html_files, and
+ downloaded URLs in urls_downloaded. All the information is
+ extracted from these two lists. */
+
+void
+convert_all_links (void)
+{
+ slist *html;
+ long msecs;
+ int file_count = 0;
+
+ struct wget_timer *timer = wtimer_new ();
+
+ /* Destructively reverse downloaded_html_files to get it in the right order.
+ recursive_retrieve() used slist_prepend() consistently. */
+ downloaded_html_list = slist_nreverse (downloaded_html_list);
+
+ for (html = downloaded_html_list; html; html = html->next)
+ {
+ struct urlpos *urls, *cur_url;
+ char *url;
+ char *file = html->string;
+
+ /* Determine the URL of the HTML file. get_urls_html will need
+ it. */
+ url = hash_table_get (dl_file_url_map, file);
+ if (!url)
+ {
+ DEBUGP (("Apparently %s has been removed.\n", file));
+ continue;
+ }
+
+ DEBUGP (("Scanning %s (from %s)\n", file, url));
+
+ /* Parse the HTML file... */
+ urls = get_urls_html (file, url, NULL);
+
+ /* We don't respect meta_disallow_follow here because, even if
+ the file is not followed, we might still want to convert the
+ links that have been followed from other files. */
+
+ for (cur_url = urls; cur_url; cur_url = cur_url->next)
+ {
+ char *local_name;
+ struct url *u = cur_url->url;
+
+ if (cur_url->link_base_p)
+ {
+ /* Base references have been resolved by our parser, so
+ we turn the base URL into an empty string. (Perhaps
+ we should remove the tag entirely?) */
+ cur_url->convert = CO_NULLIFY_BASE;
+ continue;
+ }
+
+ /* We decide the direction of conversion according to whether
+ a URL was downloaded. Downloaded URLs will be converted
+ ABS2REL, whereas non-downloaded will be converted REL2ABS. */
+ local_name = hash_table_get (dl_url_file_map, u->url);
+
+ /* Decide on the conversion type. */
+ if (local_name)
+ {
+ /* We've downloaded this URL. Convert it to relative
+ form. We do this even if the URL already is in
+ relative form, because our directory structure may
+ not be identical to that on the server (think `-nd',
+ `--cut-dirs', etc.) */
+ cur_url->convert = CO_CONVERT_TO_RELATIVE;
+ cur_url->local_name = xstrdup (local_name);
+ DEBUGP (("will convert url %s to local %s\n", u->url, local_name));
+ }
+ else
+ {
+ /* We haven't downloaded this URL. If it's not already
+ complete (including a full host name), convert it to
+ that form, so it can be reached while browsing this
+ HTML locally. */
+ if (!cur_url->link_complete_p)
+ cur_url->convert = CO_CONVERT_TO_COMPLETE;
+ cur_url->local_name = NULL;
+ DEBUGP (("will convert url %s to complete\n", u->url));
+ }
+ }
+
+ /* Convert the links in the file. */
+ convert_links (file, urls);
+ ++file_count;
+
+ /* Free the data. */
+ free_urlpos (urls);
+ }
+
+ msecs = wtimer_elapsed (timer);
+ wtimer_delete (timer);
+ logprintf (LOG_VERBOSE, _("Converted %d files in %.2f seconds.\n"),
+ file_count, (double)msecs / 1000);
+}
+
+static void write_backup_file PARAMS ((const char *, downloaded_file_t));
+static const char *replace_attr PARAMS ((const char *, int, FILE *,
+ const char *));
+static const char *replace_attr_refresh_hack PARAMS ((const char *, int, FILE *,
+ const char *, int));
+static char *local_quote_string PARAMS ((const char *));
+static char *construct_relative PARAMS ((const char *, const char *));
+
+/* Change the links in one HTML file. LINKS is a list of links in the
+ document, along with their positions and the desired direction of
+ the conversion. */
+static void
+convert_links (const char *file, struct urlpos *links)
+{
+ struct file_memory *fm;
+ FILE *fp;
+ const char *p;
+ downloaded_file_t downloaded_file_return;
+
+ struct urlpos *link;
+ int to_url_count = 0, to_file_count = 0;
+
+ logprintf (LOG_VERBOSE, _("Converting %s... "), file);
+
+ {
+ /* First we do a "dry run": go through the list L and see whether
+ any URL needs to be converted in the first place. If not, just
+ leave the file alone. */
+ int dry_count = 0;
+ struct urlpos *dry = links;
+ for (dry = links; dry; dry = dry->next)
+ if (dry->convert != CO_NOCONVERT)
+ ++dry_count;
+ if (!dry_count)
+ {
+ logputs (LOG_VERBOSE, _("nothing to do.\n"));
+ return;
+ }
+ }
+
+ fm = read_file (file);
+ if (!fm)
+ {
+ logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
+ file, strerror (errno));
+ return;
+ }
+
+ downloaded_file_return = downloaded_file (CHECK_FOR_FILE, file);
+ if (opt.backup_converted && downloaded_file_return)
+ write_backup_file (file, downloaded_file_return);
+
+ /* Before opening the file for writing, unlink the file. This is
+ important if the data in FM is mmaped. In such case, nulling the
+ file, which is what fopen() below does, would make us read all
+ zeroes from the mmaped region. */
+ if (unlink (file) < 0 && errno != ENOENT)
+ {
+ logprintf (LOG_NOTQUIET, _("Unable to delete `%s': %s\n"),
+ file, strerror (errno));
+ read_file_free (fm);
+ return;
+ }
+ /* Now open the file for writing. */
+ fp = fopen (file, "wb");
+ if (!fp)
+ {
+ logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
+ file, strerror (errno));
+ read_file_free (fm);
+ return;
+ }
+
+ /* Here we loop through all the URLs in file, replacing those of
+ them that are downloaded with relative references. */
+ p = fm->content;
+ for (link = links; link; link = link->next)
+ {
+ char *url_start = fm->content + link->pos;
+
+ if (link->pos >= fm->length)
+ {
+ DEBUGP (("Something strange is going on. Please investigate."));
+ break;
+ }
+ /* If the URL is not to be converted, skip it. */
+ if (link->convert == CO_NOCONVERT)
+ {
+ DEBUGP (("Skipping %s at position %d.\n", link->url->url, link->pos));
+ continue;
+ }
+
+ /* Echo the file contents, up to the offending URL's opening
+ quote, to the outfile. */
+ fwrite (p, 1, url_start - p, fp);
+ p = url_start;
+
+ switch (link->convert)
+ {
+ case CO_CONVERT_TO_RELATIVE:
+ /* Convert absolute URL to relative. */
+ {
+ char *newname = construct_relative (file, link->local_name);
+ char *quoted_newname = local_quote_string (newname);
+
+ if (!link->link_refresh_p)
+ p = replace_attr (p, link->size, fp, quoted_newname);
+ else
+ p = replace_attr_refresh_hack (p, link->size, fp, quoted_newname,
+ link->refresh_timeout);
+
+ DEBUGP (("TO_RELATIVE: %s to %s at position %d in %s.\n",
+ link->url->url, newname, link->pos, file));
+ xfree (newname);
+ xfree (quoted_newname);
+ ++to_file_count;
+ break;
+ }
+ case CO_CONVERT_TO_COMPLETE:
+ /* Convert the link to absolute URL. */
+ {
+ char *newlink = link->url->url;
+ char *quoted_newlink = html_quote_string (newlink);
+
+ if (!link->link_refresh_p)
+ p = replace_attr (p, link->size, fp, quoted_newlink);
+ else
+ p = replace_attr_refresh_hack (p, link->size, fp, quoted_newlink,
+ link->refresh_timeout);
+
+ DEBUGP (("TO_COMPLETE: <something> to %s at position %d in %s.\n",
+ newlink, link->pos, file));
+ xfree (quoted_newlink);
+ ++to_url_count;
+ break;
+ }
+ case CO_NULLIFY_BASE:
+ /* Change the base href to "". */
+ p = replace_attr (p, link->size, fp, "");
+ break;
+ case CO_NOCONVERT:
+ abort ();
+ break;
+ }
+ }
+
+ /* Output the rest of the file. */
+ if (p - fm->content < fm->length)
+ fwrite (p, 1, fm->length - (p - fm->content), fp);
+ fclose (fp);
+ read_file_free (fm);
+
+ logprintf (LOG_VERBOSE, "%d-%d\n", to_file_count, to_url_count);
+}
+
+/* Construct and return a malloced copy of the relative link from two
+ pieces of information: local name S1 of the referring file and
+ local name S2 of the referred file.
+
+ So, if S1 is "jagor.srce.hr/index.html" and S2 is
+ "jagor.srce.hr/images/news.gif", the function will return
+ "images/news.gif".
+
+ Alternately, if S1 is "fly.cc.fer.hr/ioccc/index.html", and S2 is
+ "fly.cc.fer.hr/images/fly.gif", the function will return
+ "../images/fly.gif".
+
+ Caveats: S1 should not begin with `/', unless S2 also begins with
+ '/'. S1 should not contain things like ".." and such --
+ construct_relative ("fly/ioccc/../index.html",
+ "fly/images/fly.gif") will fail. (A workaround is to call
+ something like path_simplify() on S1). */
+static char *
+construct_relative (const char *s1, const char *s2)
+{
+ int i, cnt, sepdirs1;
+ char *res;
+
+ if (*s2 == '/')
+ return xstrdup (s2);
+ /* S1 should *not* be absolute, if S2 wasn't. */
+ assert (*s1 != '/');
+ i = cnt = 0;
+ /* Skip the directories common to both strings. */
+ while (1)
+ {
+ while (s1[i] && s2[i]
+ && (s1[i] == s2[i])
+ && (s1[i] != '/')
+ && (s2[i] != '/'))
+ ++i;
+ if (s1[i] == '/' && s2[i] == '/')
+ cnt = ++i;
+ else
+ break;
+ }
+ for (sepdirs1 = 0; s1[i]; i++)
+ if (s1[i] == '/')
+ ++sepdirs1;
+ /* Now, construct the file as of:
+ - ../ repeated sepdirs1 time
+ - all the non-mutual directories of S2. */
+ res = (char *)xmalloc (3 * sepdirs1 + strlen (s2 + cnt) + 1);
+ for (i = 0; i < sepdirs1; i++)
+ memcpy (res + 3 * i, "../", 3);
+ strcpy (res + 3 * i, s2 + cnt);
+ return res;
+}
+
+static void
+write_backup_file (const char *file, downloaded_file_t downloaded_file_return)
+{
+ /* Rather than just writing over the original .html file with the
+ converted version, save the former to *.orig. Note we only do
+ this for files we've _successfully_ downloaded, so we don't
+ clobber .orig files sitting around from previous invocations. */
+
+ /* Construct the backup filename as the original name plus ".orig". */
+ size_t filename_len = strlen(file);
+ char* filename_plus_orig_suffix;
+ boolean already_wrote_backup_file = FALSE;
+ slist* converted_file_ptr;
+ static slist* converted_files = NULL;
+
+ if (downloaded_file_return == FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED)
+ {
+ /* Just write "orig" over "html". We need to do it this way
+ because when we're checking to see if we've downloaded the
+ file before (to see if we can skip downloading it), we don't
+ know if it's a text/html file. Therefore we don't know yet
+ at that stage that -E is going to cause us to tack on
+ ".html", so we need to compare vs. the original URL plus
+ ".orig", not the original URL plus ".html.orig". */
+ filename_plus_orig_suffix = alloca (filename_len + 1);
+ strcpy(filename_plus_orig_suffix, file);
+ strcpy((filename_plus_orig_suffix + filename_len) - 4, "orig");
+ }
+ else /* downloaded_file_return == FILE_DOWNLOADED_NORMALLY */
+ {
+ /* Append ".orig" to the name. */
+ filename_plus_orig_suffix = alloca (filename_len + sizeof(".orig"));
+ strcpy(filename_plus_orig_suffix, file);
+ strcpy(filename_plus_orig_suffix + filename_len, ".orig");
+ }
+
+ /* We can get called twice on the same URL thanks to the
+ convert_all_links() call in main(). If we write the .orig file
+ each time in such a case, it'll end up containing the first-pass
+ conversion, not the original file. So, see if we've already been
+ called on this file. */
+ converted_file_ptr = converted_files;
+ while (converted_file_ptr != NULL)
+ if (strcmp(converted_file_ptr->string, file) == 0)
+ {
+ already_wrote_backup_file = TRUE;
+ break;
+ }
+ else
+ converted_file_ptr = converted_file_ptr->next;
+
+ if (!already_wrote_backup_file)
+ {
+ /* Rename <file> to <file>.orig before former gets written over. */
+ if (rename(file, filename_plus_orig_suffix) != 0)
+ logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
+ file, filename_plus_orig_suffix, strerror (errno));
+
+ /* Remember that we've already written a .orig backup for this file.
+ Note that we never free this memory since we need it till the
+ convert_all_links() call, which is one of the last things the
+ program does before terminating. BTW, I'm not sure if it would be
+ safe to just set 'converted_file_ptr->string' to 'file' below,
+ rather than making a copy of the string... Another note is that I
+ thought I could just add a field to the urlpos structure saying
+ that we'd written a .orig file for this URL, but that didn't work,
+ so I had to make this separate list.
+ -- Dan Harkless <wget@harkless.org>
+
+ This [adding a field to the urlpos structure] didn't work
+ because convert_file() is called from convert_all_links at
+ the end of the retrieval with a freshly built new urlpos
+ list.
+ -- Hrvoje Niksic <hniksic@arsdigita.com>
+ */
+ converted_file_ptr = xmalloc(sizeof(*converted_file_ptr));
+ converted_file_ptr->string = xstrdup(file); /* die on out-of-mem. */
+ converted_file_ptr->next = converted_files;
+ converted_files = converted_file_ptr;
+ }
+}
+
+static int find_fragment PARAMS ((const char *, int, const char **,
+ const char **));
+
+/* Replace an attribute's original text with NEW_TEXT. */
+
+static const char *
+replace_attr (const char *p, int size, FILE *fp, const char *new_text)
+{
+ int quote_flag = 0;
+ char quote_char = '\"'; /* use "..." for quoting, unless the
+ original value is quoted, in which
+ case reuse its quoting char. */
+ const char *frag_beg, *frag_end;
+
+ /* Structure of our string is:
+ "...old-contents..."
+ <--- size ---> (with quotes)
+ OR:
+ ...old-contents...
+ <--- size --> (no quotes) */
+
+ if (*p == '\"' || *p == '\'')
+ {
+ quote_char = *p;
+ quote_flag = 1;
+ ++p;
+ size -= 2; /* disregard opening and closing quote */
+ }
+ putc (quote_char, fp);
+ fputs (new_text, fp);
+
+ /* Look for fragment identifier, if any. */
+ if (find_fragment (p, size, &frag_beg, &frag_end))
+ fwrite (frag_beg, 1, frag_end - frag_beg, fp);
+ p += size;
+ if (quote_flag)
+ ++p;
+ putc (quote_char, fp);
+
+ return p;
+}
+
+/* The same as REPLACE_ATTR, but used when replacing
+ <meta http-equiv=refresh content="new_text"> because we need to
+ append "timeout_value; URL=" before the next_text. */
+
+static const char *
+replace_attr_refresh_hack (const char *p, int size, FILE *fp,
+ const char *new_text, int timeout)
+{
+ /* "0; URL=..." */
+ char *new_with_timeout = (char *)alloca (numdigit (timeout)
+ + 6 /* "; URL=" */
+ + strlen (new_text)
+ + 1);
+ sprintf (new_with_timeout, "%d; URL=%s", timeout, new_text);
+
+ return replace_attr (p, size, fp, new_with_timeout);
+}
+
+/* Find the first occurrence of '#' in [BEG, BEG+SIZE) that is not
+ preceded by '&'. If the character is not found, return zero. If
+ the character is found, return 1 and set BP and EP to point to the
+ beginning and end of the region.
+
+ This is used for finding the fragment indentifiers in URLs. */
+
+static int
+find_fragment (const char *beg, int size, const char **bp, const char **ep)
+{
+ const char *end = beg + size;
+ int saw_amp = 0;
+ for (; beg < end; beg++)
+ {
+ switch (*beg)
+ {
+ case '&':
+ saw_amp = 1;
+ break;
+ case '#':
+ if (!saw_amp)
+ {
+ *bp = beg;
+ *ep = end;
+ return 1;
+ }
+ /* fallthrough */
+ default:
+ saw_amp = 0;
+ }
+ }
+ return 0;
+}
+
+/* Quote FILE for use as local reference to an HTML file.
+
+ We quote ? as %3F to avoid passing part of the file name as the
+ parameter when browsing the converted file through HTTP. However,
+ it is safe to do this only when `--html-extension' is turned on.
+ This is because converting "index.html?foo=bar" to
+ "index.html%3Ffoo=bar" would break local browsing, as the latter
+ isn't even recognized as an HTML file! However, converting
+ "index.html?foo=bar.html" to "index.html%3Ffoo=bar.html" should be
+ safe for both local and HTTP-served browsing. */
+
+static char *
+local_quote_string (const char *file)
+{
+ const char *file_sans_qmark;
+ int qm;
+
+ if (!opt.html_extension)
+ return html_quote_string (file);
+
+ qm = count_char (file, '?');
+
+ if (qm)
+ {
+ const char *from = file;
+ char *to, *newname;
+
+ /* qm * 2 because we replace each question mark with "%3F",
+ i.e. replace one char with three, hence two more. */
+ int fsqlen = strlen (file) + qm * 2;
+
+ to = newname = (char *)alloca (fsqlen + 1);
+ for (; *from; from++)
+ {
+ if (*from != '?')
+ *to++ = *from;
+ else
+ {
+ *to++ = '%';
+ *to++ = '3';
+ *to++ = 'F';
+ }
+ }
+ assert (to - newname == fsqlen);
+ *to = '\0';
+
+ file_sans_qmark = newname;
+ }
+ else
+ file_sans_qmark = file;
+
+ return html_quote_string (file_sans_qmark);
+}
+\f
+/* Book-keeping code for dl_file_url_map, dl_url_file_map,
+ downloaded_html_list, and downloaded_html_set. Other code calls
+ these functions to let us know that a file has been downloaded. */
+
+#define ENSURE_TABLES_EXIST do { \
+ if (!dl_file_url_map) \
+ dl_file_url_map = make_string_hash_table (0); \
+ if (!dl_url_file_map) \
+ dl_url_file_map = make_string_hash_table (0); \
+} while (0)
+
+/* Return 1 if S1 and S2 are the same, except for "/index.html". The
+ three cases in which it returns one are (substitute any substring
+ for "foo"):
+
+ m("foo/index.html", "foo/") ==> 1
+ m("foo/", "foo/index.html") ==> 1
+ m("foo", "foo/index.html") ==> 1
+ m("foo", "foo/" ==> 1
+ m("foo", "foo") ==> 1 */
+
+static int
+match_except_index (const char *s1, const char *s2)
+{
+ int i;
+ const char *lng;
+
+ /* Skip common substring. */
+ for (i = 0; *s1 && *s2 && *s1 == *s2; s1++, s2++, i++)
+ ;
+ if (i == 0)
+ /* Strings differ at the very beginning -- bail out. We need to
+ check this explicitly to avoid `lng - 1' reading outside the
+ array. */
+ return 0;
+
+ if (!*s1 && !*s2)
+ /* Both strings hit EOF -- strings are equal. */
+ return 1;
+ else if (*s1 && *s2)
+ /* Strings are randomly different, e.g. "/foo/bar" and "/foo/qux". */
+ return 0;
+ else if (*s1)
+ /* S1 is the longer one. */
+ lng = s1;
+ else
+ /* S2 is the longer one. */
+ lng = s2;
+
+ /* foo */ /* foo/ */
+ /* foo/index.html */ /* or */ /* foo/index.html */
+ /* ^ */ /* ^ */
+
+ if (*lng != '/')
+ /* The right-hand case. */
+ --lng;
+
+ if (*lng == '/' && *(lng + 1) == '\0')
+ /* foo */
+ /* foo/ */
+ return 1;
+
+ return 0 == strcmp (lng, "/index.html");
+}
+
+static int
+dissociate_urls_from_file_mapper (void *key, void *value, void *arg)
+{
+ char *mapping_url = (char *)key;
+ char *mapping_file = (char *)value;
+ char *file = (char *)arg;
+
+ if (0 == strcmp (mapping_file, file))
+ {
+ hash_table_remove (dl_url_file_map, mapping_url);
+ xfree (mapping_url);
+ xfree (mapping_file);
+ }
+
+ /* Continue mapping. */
+ return 0;
+}
+
+/* Remove all associations from various URLs to FILE from dl_url_file_map. */
+
+static void
+dissociate_urls_from_file (const char *file)
+{
+ hash_table_map (dl_url_file_map, dissociate_urls_from_file_mapper,
+ (char *)file);
+}
+
+/* Register that URL has been successfully downloaded to FILE. This
+ is used by the link conversion code to convert references to URLs
+ to references to local files. It is also being used to check if a
+ URL has already been downloaded. */
+
+void
+register_download (const char *url, const char *file)
+{
+ char *old_file, *old_url;
+
+ ENSURE_TABLES_EXIST;
+
+ /* With some forms of retrieval, it is possible, although not likely
+ or particularly desirable. If both are downloaded, the second
+ download will override the first one. When that happens,
+ dissociate the old file name from the URL. */
+
+ if (hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
+ {
+ if (0 == strcmp (url, old_url))
+ /* We have somehow managed to download the same URL twice.
+ Nothing to do. */
+ return;
+
+ if (match_except_index (url, old_url)
+ && !hash_table_contains (dl_url_file_map, url))
+ /* The two URLs differ only in the "index.html" ending. For
+ example, one is "http://www.server.com/", and the other is
+ "http://www.server.com/index.html". Don't remove the old
+ one, just add the new one as a non-canonical entry. */
+ goto url_only;
+
+ hash_table_remove (dl_file_url_map, file);
+ xfree (old_file);
+ xfree (old_url);
+
+ /* Remove all the URLs that point to this file. Yes, there can
+ be more than one such URL, because we store redirections as
+ multiple entries in dl_url_file_map. For example, if URL1
+ redirects to URL2 which gets downloaded to FILE, we map both
+ URL1 and URL2 to FILE in dl_url_file_map. (dl_file_url_map
+ only points to URL2.) When another URL gets loaded to FILE,
+ we want both URL1 and URL2 dissociated from it.
+
+ This is a relatively expensive operation because it performs
+ a linear search of the whole hash table, but it should be
+ called very rarely, only when two URLs resolve to the same
+ file name, *and* the "<file>.1" extensions are turned off.
+ In other words, almost never. */
+ dissociate_urls_from_file (file);
+ }
+
+ hash_table_put (dl_file_url_map, xstrdup (file), xstrdup (url));
+
+ url_only:
+ /* A URL->FILE mapping is not possible without a FILE->URL mapping.
+ If the latter were present, it should have been removed by the
+ above `if'. So we could write:
+
+ assert (!hash_table_contains (dl_url_file_map, url));
+
+ The above is correct when running in recursive mode where the
+ same URL always resolves to the same file. But if you do
+ something like:
+
+ wget URL URL
+
+ then the first URL will resolve to "FILE", and the other to
+ "FILE.1". In that case, FILE.1 will not be found in
+ dl_file_url_map, but URL will still point to FILE in
+ dl_url_file_map. */
+ if (hash_table_get_pair (dl_url_file_map, url, &old_url, &old_file))
+ {
+ hash_table_remove (dl_url_file_map, url);
+ xfree (old_url);
+ xfree (old_file);
+ }
+
+ hash_table_put (dl_url_file_map, xstrdup (url), xstrdup (file));
+}
+
+/* Register that FROM has been redirected to TO. This assumes that TO
+ is successfully downloaded and already registered using
+ register_download() above. */
+
+void
+register_redirection (const char *from, const char *to)
+{
+ char *file;
+
+ ENSURE_TABLES_EXIST;
+
+ file = hash_table_get (dl_url_file_map, to);
+ assert (file != NULL);
+ if (!hash_table_contains (dl_url_file_map, from))
+ hash_table_put (dl_url_file_map, xstrdup (from), xstrdup (file));
+}
+
+/* Register that the file has been deleted. */
+
+void
+register_delete_file (const char *file)
+{
+ char *old_url, *old_file;
+
+ ENSURE_TABLES_EXIST;
+
+ if (!hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
+ return;
+
+ hash_table_remove (dl_file_url_map, file);
+ xfree (old_file);
+ xfree (old_url);
+ dissociate_urls_from_file (file);
+}
+
+/* Register that FILE is an HTML file that has been downloaded. */
+
+void
+register_html (const char *url, const char *file)
+{
+ if (!downloaded_html_set)
+ downloaded_html_set = make_string_hash_table (0);
+ else if (hash_table_contains (downloaded_html_set, file))
+ return;
+
+ /* The set and the list should use the same copy of FILE, but the
+ slist interface insists on strduping the string it gets. Oh
+ well. */
+ string_set_add (downloaded_html_set, file);
+ downloaded_html_list = slist_prepend (downloaded_html_list, file);
+}
+
+/* Cleanup the data structures associated with recursive retrieving
+ (the variables above). */
+void
+convert_cleanup (void)
+{
+ if (dl_file_url_map)
+ {
+ free_keys_and_values (dl_file_url_map);
+ hash_table_destroy (dl_file_url_map);
+ dl_file_url_map = NULL;
+ }
+ if (dl_url_file_map)
+ {
+ free_keys_and_values (dl_url_file_map);
+ hash_table_destroy (dl_url_file_map);
+ dl_url_file_map = NULL;
+ }
+ if (downloaded_html_set)
+ string_set_free (downloaded_html_set);
+ slist_free (downloaded_html_list);
+ downloaded_html_list = NULL;
+}
+\f
+/* Book-keeping code for downloaded files that enables extension
+ hacks. */
+
+/* This table should really be merged with dl_file_url_map and
+ downloaded_html_files. This was originally a list, but I changed
+ it to a hash table beause it was actually taking a lot of time to
+ find things in it. */
+
+static struct hash_table *downloaded_files_hash;
+
+/* We're storing "modes" of type downloaded_file_t in the hash table.
+ However, our hash tables only accept pointers for keys and values.
+ So when we need a pointer, we use the address of a
+ downloaded_file_t variable of static storage. */
+
+static downloaded_file_t *
+downloaded_mode_to_ptr (downloaded_file_t mode)
+{
+ static downloaded_file_t
+ v1 = FILE_NOT_ALREADY_DOWNLOADED,
+ v2 = FILE_DOWNLOADED_NORMALLY,
+ v3 = FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
+ v4 = CHECK_FOR_FILE;
+
+ switch (mode)
+ {
+ case FILE_NOT_ALREADY_DOWNLOADED:
+ return &v1;
+ case FILE_DOWNLOADED_NORMALLY:
+ return &v2;
+ case FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED:
+ return &v3;
+ case CHECK_FOR_FILE:
+ return &v4;
+ }
+ return NULL;
+}
+
+/* Remembers which files have been downloaded. In the standard case,
+ should be called with mode == FILE_DOWNLOADED_NORMALLY for each
+ file we actually download successfully (i.e. not for ones we have
+ failures on or that we skip due to -N).
+
+ When we've downloaded a file and tacked on a ".html" extension due
+ to -E, call this function with
+ FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED rather than
+ FILE_DOWNLOADED_NORMALLY.
+
+ If you just want to check if a file has been previously added
+ without adding it, call with mode == CHECK_FOR_FILE. Please be
+ sure to call this function with local filenames, not remote
+ URLs. */
+
+downloaded_file_t
+downloaded_file (downloaded_file_t mode, const char *file)
+{
+ downloaded_file_t *ptr;
+
+ if (mode == CHECK_FOR_FILE)
+ {
+ if (!downloaded_files_hash)
+ return FILE_NOT_ALREADY_DOWNLOADED;
+ ptr = hash_table_get (downloaded_files_hash, file);
+ if (!ptr)
+ return FILE_NOT_ALREADY_DOWNLOADED;
+ return *ptr;
+ }
+
+ if (!downloaded_files_hash)
+ downloaded_files_hash = make_string_hash_table (0);
+
+ ptr = hash_table_get (downloaded_files_hash, file);
+ if (ptr)
+ return *ptr;
+
+ ptr = downloaded_mode_to_ptr (mode);
+ hash_table_put (downloaded_files_hash, xstrdup (file), &ptr);
+
+ return FILE_NOT_ALREADY_DOWNLOADED;
+}
+
+static int
+df_free_mapper (void *key, void *value, void *ignored)
+{
+ xfree (key);
+ return 0;
+}
+
+void
+downloaded_files_free (void)
+{
+ if (downloaded_files_hash)
+ {
+ hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
+ hash_table_destroy (downloaded_files_hash);
+ downloaded_files_hash = NULL;
+ }
+}
--- /dev/null
+/* Declarations for convert.c
+ Copyright (C) 2003 Free Software Foundation, Inc.
+
+This file is part of GNU Wget.
+
+GNU Wget is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+GNU Wget is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Wget; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+In addition, as a special exception, the Free Software Foundation
+gives permission to link the code of its release of Wget with the
+OpenSSL project's "OpenSSL" library (or with modified versions of it
+that use the same license as the "OpenSSL" library), and distribute
+the linked executables. You must obey the GNU General Public License
+in all respects for all of the code used other than "OpenSSL". If you
+modify this file, you may extend this exception to your version of the
+file, but you are not obligated to do so. If you do not wish to do
+so, delete this exception statement from your version. */
+
+#ifndef CONVERT_H
+#define CONVERT_H
+
+enum convert_options {
+ CO_NOCONVERT = 0, /* don't convert this URL */
+ CO_CONVERT_TO_RELATIVE, /* convert to relative, e.g. to
+ "../../otherdir/foo.gif" */
+ CO_CONVERT_TO_COMPLETE, /* convert to absolute, e.g. to
+ "http://orighost/somedir/bar.jpg". */
+ CO_NULLIFY_BASE /* change to empty string. */
+};
+
+struct url;
+
+/* A structure that defines the whereabouts of a URL, i.e. its
+ position in an HTML document, etc. */
+
+struct urlpos {
+ struct url *url; /* the URL of the link, after it has
+ been merged with the base */
+ char *local_name; /* local file to which it was saved
+ (used by convert_links) */
+
+ /* reserved for special links such as <base href="..."> which are
+ used when converting links, but ignored when downloading. */
+ unsigned int ignore_when_downloading :1;
+
+ /* Information about the original link: */
+
+ unsigned int link_relative_p :1; /* was the link relative? */
+ unsigned int link_complete_p :1; /* was the link complete (with the
+ host name, etc.) */
+ unsigned int link_base_p :1; /* was the link <base href=...> */
+ unsigned int link_inline_p :1; /* needed to render the page. */
+
+ unsigned int link_refresh_p :1; /* link was received from
+ <meta http-equiv=refresh content=...> */
+ int refresh_timeout; /* for reconstructing the refresh. */
+
+ /* Conversion requirements: */
+ enum convert_options convert; /* is conversion required? */
+
+ /* URL's position in the buffer. */
+ int pos, size;
+
+ struct urlpos *next; /* next list element */
+};
+
+/* downloaded_file() takes a parameter of this type and returns this type. */
+typedef enum
+{
+ /* Return enumerators: */
+ FILE_NOT_ALREADY_DOWNLOADED = 0,
+
+ /* Return / parameter enumerators: */
+ FILE_DOWNLOADED_NORMALLY,
+ FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
+
+ /* Parameter enumerators: */
+ CHECK_FOR_FILE
+} downloaded_file_t;
+
+downloaded_file_t downloaded_file PARAMS ((downloaded_file_t, const char *));
+
+void register_download PARAMS ((const char *, const char *));
+void register_redirection PARAMS ((const char *, const char *));
+void register_html PARAMS ((const char *, const char *));
+void register_delete_file PARAMS ((const char *));
+void convert_all_links PARAMS ((void));
+
+#endif /* CONVERT_H */
#include "host.h"
#include "fnmatch.h"
#include "netrc.h"
+#include "convert.h" /* for downloaded_file */
#ifndef errno
extern int errno;
/* If we get out of the switch above without continue'ing, we've
successfully downloaded a file. Remember this fact. */
- downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
+ downloaded_file (FILE_DOWNLOADED_NORMALLY, locf);
if (con->st & ON_YOUR_OWN)
{
#include "html-parse.h"
#include "url.h"
#include "utils.h"
+#include "convert.h"
#ifndef errno
extern int errno;
/* Analyze HTML tags FILE and construct a list of URLs referenced from
it. It merges relative links in FILE with URL. It is aware of
<base href=...> and does the right thing. */
+
struct urlpos *
get_urls_html (const char *file, const char *url, int *meta_disallow_follow)
{
return ctx.head;
}
+/* This doesn't really have anything to do with HTML, but it's similar
+ to get_urls_html, so we put it here. */
+
+struct urlpos *
+get_urls_file (const char *file)
+{
+ struct file_memory *fm;
+ struct urlpos *head, *tail;
+ const char *text, *text_end;
+
+ /* Load the file. */
+ fm = read_file (file);
+ if (!fm)
+ {
+ logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
+ return NULL;
+ }
+ DEBUGP (("Loaded %s (size %ld).\n", file, fm->length));
+
+ head = tail = NULL;
+ text = fm->content;
+ text_end = fm->content + fm->length;
+ while (text < text_end)
+ {
+ int up_error_code;
+ char *url_text;
+ struct urlpos *entry;
+ struct url *url;
+
+ const char *line_beg = text;
+ const char *line_end = memchr (text, '\n', text_end - text);
+ if (!line_end)
+ line_end = text_end;
+ else
+ ++line_end;
+ text = line_end;
+
+ /* Strip whitespace from the beginning and end of line. */
+ while (line_beg < line_end && ISSPACE (*line_beg))
+ ++line_beg;
+ while (line_end > line_beg && ISSPACE (*(line_end - 1)))
+ --line_end;
+
+ if (line_beg == line_end)
+ continue;
+
+ /* The URL is in the [line_beg, line_end) region. */
+
+ /* We must copy the URL to a zero-terminated string, and we
+ can't use alloca because we're in a loop. *sigh*. */
+ url_text = strdupdelim (line_beg, line_end);
+
+ if (opt.base_href)
+ {
+ /* Merge opt.base_href with URL. */
+ char *merged = uri_merge (opt.base_href, url_text);
+ xfree (url_text);
+ url_text = merged;
+ }
+
+ url = url_parse (url_text, &up_error_code);
+ if (!url)
+ {
+ logprintf (LOG_NOTQUIET, "%s: Invalid URL %s: %s\n",
+ file, url_text, url_error (up_error_code));
+ xfree (url_text);
+ continue;
+ }
+ xfree (url_text);
+
+ entry = (struct urlpos *)xmalloc (sizeof (struct urlpos));
+ memset (entry, 0, sizeof (*entry));
+ entry->next = NULL;
+ entry->url = url;
+
+ if (!head)
+ head = entry;
+ else
+ tail->next = entry;
+ tail = entry;
+ }
+ read_file_free (fm);
+ return head;
+}
+
void
cleanup_html_url (void)
{
#ifdef USE_DIGEST
# include "gen-md5.h"
#endif
+#include "convert.h"
extern char *version_string;
#include "utils.h"
#include "init.h"
#include "host.h"
-#include "recur.h"
#include "netrc.h"
#include "cookies.h" /* for cookie_jar_delete */
#include "progress.h"
memory which grows with the size of the program. */
#ifdef DEBUG_MALLOC
- recursive_cleanup ();
+ convert_cleanup ();
res_cleanup ();
http_cleanup ();
cleanup_html_url ();
#include "host.h"
#include "hash.h"
#include "res.h"
+#include "convert.h"
#ifndef errno
extern int errno;
extern char *version_string;
-static struct hash_table *dl_file_url_map;
-static struct hash_table *dl_url_file_map;
-
-/* List of HTML files downloaded in this Wget run, used for link
- conversion after Wget is done. The list and the set contain the
- same information, except the list maintains the order. Perhaps I
- should get rid of the list, it's there for historical reasons. */
-static slist *downloaded_html_list;
-static struct hash_table *downloaded_html_set;
-
-static void register_delete_file PARAMS ((const char *));
+extern struct hash_table *dl_url_file_map;
+extern struct hash_table *downloaded_html_set;
\f
/* Functions for maintaining the URL queue. */
return success;
}
-
-\f
-#define ENSURE_TABLES_EXIST do { \
- if (!dl_file_url_map) \
- dl_file_url_map = make_string_hash_table (0); \
- if (!dl_url_file_map) \
- dl_url_file_map = make_string_hash_table (0); \
-} while (0)
-
-/* Return 1 if S1 and S2 are the same, except for "/index.html". The
- three cases in which it returns one are (substitute any substring
- for "foo"):
-
- m("foo/index.html", "foo/") ==> 1
- m("foo/", "foo/index.html") ==> 1
- m("foo", "foo/index.html") ==> 1
- m("foo", "foo/" ==> 1
- m("foo", "foo") ==> 1 */
-
-static int
-match_except_index (const char *s1, const char *s2)
-{
- int i;
- const char *lng;
-
- /* Skip common substring. */
- for (i = 0; *s1 && *s2 && *s1 == *s2; s1++, s2++, i++)
- ;
- if (i == 0)
- /* Strings differ at the very beginning -- bail out. We need to
- check this explicitly to avoid `lng - 1' reading outside the
- array. */
- return 0;
-
- if (!*s1 && !*s2)
- /* Both strings hit EOF -- strings are equal. */
- return 1;
- else if (*s1 && *s2)
- /* Strings are randomly different, e.g. "/foo/bar" and "/foo/qux". */
- return 0;
- else if (*s1)
- /* S1 is the longer one. */
- lng = s1;
- else
- /* S2 is the longer one. */
- lng = s2;
-
- /* foo */ /* foo/ */
- /* foo/index.html */ /* or */ /* foo/index.html */
- /* ^ */ /* ^ */
-
- if (*lng != '/')
- /* The right-hand case. */
- --lng;
-
- if (*lng == '/' && *(lng + 1) == '\0')
- /* foo */
- /* foo/ */
- return 1;
-
- return 0 == strcmp (lng, "/index.html");
-}
-
-static int
-dissociate_urls_from_file_mapper (void *key, void *value, void *arg)
-{
- char *mapping_url = (char *)key;
- char *mapping_file = (char *)value;
- char *file = (char *)arg;
-
- if (0 == strcmp (mapping_file, file))
- {
- hash_table_remove (dl_url_file_map, mapping_url);
- xfree (mapping_url);
- xfree (mapping_file);
- }
-
- /* Continue mapping. */
- return 0;
-}
-
-/* Remove all associations from various URLs to FILE from dl_url_file_map. */
-
-static void
-dissociate_urls_from_file (const char *file)
-{
- hash_table_map (dl_url_file_map, dissociate_urls_from_file_mapper,
- (char *)file);
-}
-
-/* Register that URL has been successfully downloaded to FILE. This
- is used by the link conversion code to convert references to URLs
- to references to local files. It is also being used to check if a
- URL has already been downloaded. */
-
-void
-register_download (const char *url, const char *file)
-{
- char *old_file, *old_url;
-
- ENSURE_TABLES_EXIST;
-
- /* With some forms of retrieval, it is possible, although not likely
- or particularly desirable. If both are downloaded, the second
- download will override the first one. When that happens,
- dissociate the old file name from the URL. */
-
- if (hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
- {
- if (0 == strcmp (url, old_url))
- /* We have somehow managed to download the same URL twice.
- Nothing to do. */
- return;
-
- if (match_except_index (url, old_url)
- && !hash_table_contains (dl_url_file_map, url))
- /* The two URLs differ only in the "index.html" ending. For
- example, one is "http://www.server.com/", and the other is
- "http://www.server.com/index.html". Don't remove the old
- one, just add the new one as a non-canonical entry. */
- goto url_only;
-
- hash_table_remove (dl_file_url_map, file);
- xfree (old_file);
- xfree (old_url);
-
- /* Remove all the URLs that point to this file. Yes, there can
- be more than one such URL, because we store redirections as
- multiple entries in dl_url_file_map. For example, if URL1
- redirects to URL2 which gets downloaded to FILE, we map both
- URL1 and URL2 to FILE in dl_url_file_map. (dl_file_url_map
- only points to URL2.) When another URL gets loaded to FILE,
- we want both URL1 and URL2 dissociated from it.
-
- This is a relatively expensive operation because it performs
- a linear search of the whole hash table, but it should be
- called very rarely, only when two URLs resolve to the same
- file name, *and* the "<file>.1" extensions are turned off.
- In other words, almost never. */
- dissociate_urls_from_file (file);
- }
-
- hash_table_put (dl_file_url_map, xstrdup (file), xstrdup (url));
-
- url_only:
- /* A URL->FILE mapping is not possible without a FILE->URL mapping.
- If the latter were present, it should have been removed by the
- above `if'. So we could write:
-
- assert (!hash_table_contains (dl_url_file_map, url));
-
- The above is correct when running in recursive mode where the
- same URL always resolves to the same file. But if you do
- something like:
-
- wget URL URL
-
- then the first URL will resolve to "FILE", and the other to
- "FILE.1". In that case, FILE.1 will not be found in
- dl_file_url_map, but URL will still point to FILE in
- dl_url_file_map. */
- if (hash_table_get_pair (dl_url_file_map, url, &old_url, &old_file))
- {
- hash_table_remove (dl_url_file_map, url);
- xfree (old_url);
- xfree (old_file);
- }
-
- hash_table_put (dl_url_file_map, xstrdup (url), xstrdup (file));
-}
-
-/* Register that FROM has been redirected to TO. This assumes that TO
- is successfully downloaded and already registered using
- register_download() above. */
-
-void
-register_redirection (const char *from, const char *to)
-{
- char *file;
-
- ENSURE_TABLES_EXIST;
-
- file = hash_table_get (dl_url_file_map, to);
- assert (file != NULL);
- if (!hash_table_contains (dl_url_file_map, from))
- hash_table_put (dl_url_file_map, xstrdup (from), xstrdup (file));
-}
-
-/* Register that the file has been deleted. */
-
-static void
-register_delete_file (const char *file)
-{
- char *old_url, *old_file;
-
- ENSURE_TABLES_EXIST;
-
- if (!hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
- return;
-
- hash_table_remove (dl_file_url_map, file);
- xfree (old_file);
- xfree (old_url);
- dissociate_urls_from_file (file);
-}
-
-/* Register that FILE is an HTML file that has been downloaded. */
-
-void
-register_html (const char *url, const char *file)
-{
- if (!downloaded_html_set)
- downloaded_html_set = make_string_hash_table (0);
- else if (hash_table_contains (downloaded_html_set, file))
- return;
-
- /* The set and the list should use the same copy of FILE, but the
- slist interface insists on strduping the string it gets. Oh
- well. */
- string_set_add (downloaded_html_set, file);
- downloaded_html_list = slist_prepend (downloaded_html_list, file);
-}
-
-/* This function is called when the retrieval is done to convert the
- links that have been downloaded. It has to be called at the end of
- the retrieval, because only then does Wget know conclusively which
- URLs have been downloaded, and which not, so it can tell which
- direction to convert to.
-
- The "direction" means that the URLs to the files that have been
- downloaded get converted to the relative URL which will point to
- that file. And the other URLs get converted to the remote URL on
- the server.
-
- All the downloaded HTMLs are kept in downloaded_html_files, and
- downloaded URLs in urls_downloaded. All the information is
- extracted from these two lists. */
-
-void
-convert_all_links (void)
-{
- slist *html;
- long msecs;
- int file_count = 0;
-
- struct wget_timer *timer = wtimer_new ();
-
- /* Destructively reverse downloaded_html_files to get it in the right order.
- recursive_retrieve() used slist_prepend() consistently. */
- downloaded_html_list = slist_nreverse (downloaded_html_list);
-
- for (html = downloaded_html_list; html; html = html->next)
- {
- struct urlpos *urls, *cur_url;
- char *url;
- char *file = html->string;
-
- /* Determine the URL of the HTML file. get_urls_html will need
- it. */
- url = hash_table_get (dl_file_url_map, file);
- if (!url)
- {
- DEBUGP (("Apparently %s has been removed.\n", file));
- continue;
- }
-
- DEBUGP (("Scanning %s (from %s)\n", file, url));
-
- /* Parse the HTML file... */
- urls = get_urls_html (file, url, NULL);
-
- /* We don't respect meta_disallow_follow here because, even if
- the file is not followed, we might still want to convert the
- links that have been followed from other files. */
-
- for (cur_url = urls; cur_url; cur_url = cur_url->next)
- {
- char *local_name;
- struct url *u = cur_url->url;
-
- if (cur_url->link_base_p)
- {
- /* Base references have been resolved by our parser, so
- we turn the base URL into an empty string. (Perhaps
- we should remove the tag entirely?) */
- cur_url->convert = CO_NULLIFY_BASE;
- continue;
- }
-
- /* We decide the direction of conversion according to whether
- a URL was downloaded. Downloaded URLs will be converted
- ABS2REL, whereas non-downloaded will be converted REL2ABS. */
- local_name = hash_table_get (dl_url_file_map, u->url);
-
- /* Decide on the conversion type. */
- if (local_name)
- {
- /* We've downloaded this URL. Convert it to relative
- form. We do this even if the URL already is in
- relative form, because our directory structure may
- not be identical to that on the server (think `-nd',
- `--cut-dirs', etc.) */
- cur_url->convert = CO_CONVERT_TO_RELATIVE;
- cur_url->local_name = xstrdup (local_name);
- DEBUGP (("will convert url %s to local %s\n", u->url, local_name));
- }
- else
- {
- /* We haven't downloaded this URL. If it's not already
- complete (including a full host name), convert it to
- that form, so it can be reached while browsing this
- HTML locally. */
- if (!cur_url->link_complete_p)
- cur_url->convert = CO_CONVERT_TO_COMPLETE;
- cur_url->local_name = NULL;
- DEBUGP (("will convert url %s to complete\n", u->url));
- }
- }
-
- /* Convert the links in the file. */
- convert_links (file, urls);
- ++file_count;
-
- /* Free the data. */
- free_urlpos (urls);
- }
-
- msecs = wtimer_elapsed (timer);
- wtimer_delete (timer);
- logprintf (LOG_VERBOSE, _("Converted %d files in %.2f seconds.\n"),
- file_count, (double)msecs / 1000);
-}
-
-/* Cleanup the data structures associated with recursive retrieving
- (the variables above). */
-void
-recursive_cleanup (void)
-{
- if (dl_file_url_map)
- {
- free_keys_and_values (dl_file_url_map);
- hash_table_destroy (dl_file_url_map);
- dl_file_url_map = NULL;
- }
- if (dl_url_file_map)
- {
- free_keys_and_values (dl_url_file_map);
- hash_table_destroy (dl_url_file_map);
- dl_url_file_map = NULL;
- }
- if (downloaded_html_set)
- string_set_free (downloaded_html_set);
- slist_free (downloaded_html_list);
- downloaded_html_list = NULL;
-}
#ifndef RECUR_H
#define RECUR_H
+struct urlpos;
+
void recursive_cleanup PARAMS ((void));
uerr_t retrieve_tree PARAMS ((const char *));
-void register_download PARAMS ((const char *, const char *));
-void register_redirection PARAMS ((const char *, const char *));
-void register_html PARAMS ((const char *, const char *));
-void convert_all_links PARAMS ((void));
+/* These are really in html-url.c. */
+struct urlpos *get_urls_file PARAMS ((const char *));
+struct urlpos *get_urls_html PARAMS ((const char *, const char *, int *));
+void free_urlpos PARAMS ((struct urlpos *));
#endif /* RECUR_H */
#include "host.h"
#include "connect.h"
#include "hash.h"
+#include "convert.h"
#ifdef HAVE_SSL
# include "gen_sslfunc.h" /* for ssl_iread */
} \
} while (0)
+static char *getproxy PARAMS ((struct url *));
+
/* Retrieve the given URL. Decides which loop to call -- HTTP, FTP,
FTP, proxy, etc. */
}
}
}
+
+/* Free the linked list of urlpos. */
+void
+free_urlpos (struct urlpos *l)
+{
+ while (l)
+ {
+ struct urlpos *next = l->next;
+ if (l->url)
+ url_free (l->url);
+ FREE_MAYBE (l->local_name);
+ xfree (l);
+ l = next;
+ }
+}
+
+/* Rotate FNAME opt.backups times */
+void
+rotate_backups(const char *fname)
+{
+ int maxlen = strlen (fname) + 1 + numdigit (opt.backups) + 1;
+ char *from = (char *)alloca (maxlen);
+ char *to = (char *)alloca (maxlen);
+ struct stat sb;
+ int i;
+
+ if (stat (fname, &sb) == 0)
+ if (S_ISREG (sb.st_mode) == 0)
+ return;
+
+ for (i = opt.backups; i > 1; i--)
+ {
+ sprintf (from, "%s.%d", fname, i - 1);
+ sprintf (to, "%s.%d", fname, i);
+ rename (from, to);
+ }
+
+ sprintf (to, "%s.%d", fname, 1);
+ rename(fname, to);
+}
+
+static int no_proxy_match PARAMS ((const char *, const char **));
+
+/* Return the URL of the proxy appropriate for url U. */
+
+static char *
+getproxy (struct url *u)
+{
+ char *proxy = NULL;
+ char *rewritten_url;
+ static char rewritten_storage[1024];
+
+ if (!opt.use_proxy)
+ return NULL;
+ if (!no_proxy_match (u->host, (const char **)opt.no_proxy))
+ return NULL;
+
+ switch (u->scheme)
+ {
+ case SCHEME_HTTP:
+ proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
+ break;
+#ifdef HAVE_SSL
+ case SCHEME_HTTPS:
+ proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
+ break;
+#endif
+ case SCHEME_FTP:
+ proxy = opt.ftp_proxy ? opt.ftp_proxy : getenv ("ftp_proxy");
+ break;
+ case SCHEME_INVALID:
+ break;
+ }
+ if (!proxy || !*proxy)
+ return NULL;
+
+ /* Handle shorthands. `rewritten_storage' is a kludge to allow
+ getproxy() to return static storage. */
+ rewritten_url = rewrite_shorthand_url (proxy);
+ if (rewritten_url)
+ {
+ strncpy (rewritten_storage, rewritten_url, sizeof(rewritten_storage));
+ rewritten_storage[sizeof (rewritten_storage) - 1] = '\0';
+ proxy = rewritten_storage;
+ }
+
+ return proxy;
+}
+
+/* Should a host be accessed through proxy, concerning no_proxy? */
+int
+no_proxy_match (const char *host, const char **no_proxy)
+{
+ if (!no_proxy)
+ return 1;
+ else
+ return !sufmatch (no_proxy, host);
+}
void sleep_between_retrievals PARAMS ((int));
+void rotate_backups PARAMS ((const char *));
+
/* Because there's no http.h. */
struct url;
/* Forward declarations: */
-static char *construct_relative PARAMS ((const char *, const char *));
static int path_simplify PARAMS ((char *));
-
-
\f
/* Support for encoding and decoding of URL strings. We determine
whether a character is unsafe through static table lookup. This
xfree (url);
}
\f
-struct urlpos *
-get_urls_file (const char *file)
-{
- struct file_memory *fm;
- struct urlpos *head, *tail;
- const char *text, *text_end;
-
- /* Load the file. */
- fm = read_file (file);
- if (!fm)
- {
- logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
- return NULL;
- }
- DEBUGP (("Loaded %s (size %ld).\n", file, fm->length));
-
- head = tail = NULL;
- text = fm->content;
- text_end = fm->content + fm->length;
- while (text < text_end)
- {
- const char *line_beg = text;
- const char *line_end = memchr (text, '\n', text_end - text);
- if (!line_end)
- line_end = text_end;
- else
- ++line_end;
- text = line_end;
-
- /* Strip whitespace from the beginning and end of line. */
- while (line_beg < line_end && ISSPACE (*line_beg))
- ++line_beg;
- while (line_end > line_beg && ISSPACE (*(line_end - 1)))
- --line_end;
-
- if (line_end > line_beg)
- {
- /* URL is in the [line_beg, line_end) region. */
-
- int up_error_code;
- char *url_text;
- struct urlpos *entry;
- struct url *url;
-
- /* We must copy the URL to a zero-terminated string, and we
- can't use alloca because we're in a loop. *sigh*. */
- url_text = strdupdelim (line_beg, line_end);
-
- if (opt.base_href)
- {
- /* Merge opt.base_href with URL. */
- char *merged = uri_merge (opt.base_href, url_text);
- xfree (url_text);
- url_text = merged;
- }
-
- url = url_parse (url_text, &up_error_code);
- if (!url)
- {
- logprintf (LOG_NOTQUIET, "%s: Invalid URL %s: %s\n",
- file, url_text, url_error (up_error_code));
- xfree (url_text);
- continue;
- }
- xfree (url_text);
-
- entry = (struct urlpos *)xmalloc (sizeof (struct urlpos));
- memset (entry, 0, sizeof (*entry));
- entry->next = NULL;
- entry->url = url;
-
- if (!head)
- head = entry;
- else
- tail->next = entry;
- tail = entry;
- }
- }
- read_file_free (fm);
- return head;
-}
-\f
-/* Free the linked list of urlpos. */
-void
-free_urlpos (struct urlpos *l)
-{
- while (l)
- {
- struct urlpos *next = l->next;
- if (l->url)
- url_free (l->url);
- FREE_MAYBE (l->local_name);
- xfree (l);
- l = next;
- }
-}
-
-/* Rotate FNAME opt.backups times */
-void
-rotate_backups(const char *fname)
-{
- int maxlen = strlen (fname) + 1 + numdigit (opt.backups) + 1;
- char *from = (char *)alloca (maxlen);
- char *to = (char *)alloca (maxlen);
- struct stat sb;
- int i;
-
- if (stat (fname, &sb) == 0)
- if (S_ISREG (sb.st_mode) == 0)
- return;
-
- for (i = opt.backups; i > 1; i--)
- {
- sprintf (from, "%s.%d", fname, i - 1);
- sprintf (to, "%s.%d", fname, i);
- rename (from, to);
- }
-
- sprintf (to, "%s.%d", fname, 1);
- rename(fname, to);
-}
-
/* Create all the necessary directories for PATH (a file). Calls
mkdirhier() internally. */
int
return result;
}
\f
-/* Return the URL of the proxy appropriate for url U. */
-char *
-getproxy (struct url *u)
-{
- char *proxy = NULL;
- char *rewritten_url;
- static char rewritten_storage[1024];
-
- if (!opt.use_proxy)
- return NULL;
- if (!no_proxy_match (u->host, (const char **)opt.no_proxy))
- return NULL;
-
- switch (u->scheme)
- {
- case SCHEME_HTTP:
- proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
- break;
-#ifdef HAVE_SSL
- case SCHEME_HTTPS:
- proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
- break;
-#endif
- case SCHEME_FTP:
- proxy = opt.ftp_proxy ? opt.ftp_proxy : getenv ("ftp_proxy");
- break;
- case SCHEME_INVALID:
- break;
- }
- if (!proxy || !*proxy)
- return NULL;
-
- /* Handle shorthands. `rewritten_storage' is a kludge to allow
- getproxy() to return static storage. */
- rewritten_url = rewrite_shorthand_url (proxy);
- if (rewritten_url)
- {
- strncpy (rewritten_storage, rewritten_url, sizeof(rewritten_storage));
- rewritten_storage[sizeof (rewritten_storage) - 1] = '\0';
- proxy = rewritten_storage;
- }
-
- return proxy;
-}
-
-/* Should a host be accessed through proxy, concerning no_proxy? */
-int
-no_proxy_match (const char *host, const char **no_proxy)
-{
- if (!no_proxy)
- return 1;
- else
- return !sufmatch (no_proxy, host);
-}
-\f
-/* Support for converting links for local viewing in downloaded HTML
- files. This should be moved to another file, because it has
- nothing to do with processing URLs. */
-
-static void write_backup_file PARAMS ((const char *, downloaded_file_t));
-static const char *replace_attr PARAMS ((const char *, int, FILE *,
- const char *));
-static const char *replace_attr_refresh_hack PARAMS ((const char *, int, FILE *,
- const char *, int));
-static char *local_quote_string PARAMS ((const char *));
-
-/* Change the links in one HTML file. LINKS is a list of links in the
- document, along with their positions and the desired direction of
- the conversion. */
-void
-convert_links (const char *file, struct urlpos *links)
-{
- struct file_memory *fm;
- FILE *fp;
- const char *p;
- downloaded_file_t downloaded_file_return;
-
- struct urlpos *link;
- int to_url_count = 0, to_file_count = 0;
-
- logprintf (LOG_VERBOSE, _("Converting %s... "), file);
-
- {
- /* First we do a "dry run": go through the list L and see whether
- any URL needs to be converted in the first place. If not, just
- leave the file alone. */
- int dry_count = 0;
- struct urlpos *dry = links;
- for (dry = links; dry; dry = dry->next)
- if (dry->convert != CO_NOCONVERT)
- ++dry_count;
- if (!dry_count)
- {
- logputs (LOG_VERBOSE, _("nothing to do.\n"));
- return;
- }
- }
-
- fm = read_file (file);
- if (!fm)
- {
- logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
- file, strerror (errno));
- return;
- }
-
- downloaded_file_return = downloaded_file (CHECK_FOR_FILE, file);
- if (opt.backup_converted && downloaded_file_return)
- write_backup_file (file, downloaded_file_return);
-
- /* Before opening the file for writing, unlink the file. This is
- important if the data in FM is mmaped. In such case, nulling the
- file, which is what fopen() below does, would make us read all
- zeroes from the mmaped region. */
- if (unlink (file) < 0 && errno != ENOENT)
- {
- logprintf (LOG_NOTQUIET, _("Unable to delete `%s': %s\n"),
- file, strerror (errno));
- read_file_free (fm);
- return;
- }
- /* Now open the file for writing. */
- fp = fopen (file, "wb");
- if (!fp)
- {
- logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
- file, strerror (errno));
- read_file_free (fm);
- return;
- }
-
- /* Here we loop through all the URLs in file, replacing those of
- them that are downloaded with relative references. */
- p = fm->content;
- for (link = links; link; link = link->next)
- {
- char *url_start = fm->content + link->pos;
-
- if (link->pos >= fm->length)
- {
- DEBUGP (("Something strange is going on. Please investigate."));
- break;
- }
- /* If the URL is not to be converted, skip it. */
- if (link->convert == CO_NOCONVERT)
- {
- DEBUGP (("Skipping %s at position %d.\n", link->url->url, link->pos));
- continue;
- }
-
- /* Echo the file contents, up to the offending URL's opening
- quote, to the outfile. */
- fwrite (p, 1, url_start - p, fp);
- p = url_start;
-
- switch (link->convert)
- {
- case CO_CONVERT_TO_RELATIVE:
- /* Convert absolute URL to relative. */
- {
- char *newname = construct_relative (file, link->local_name);
- char *quoted_newname = local_quote_string (newname);
-
- if (!link->link_refresh_p)
- p = replace_attr (p, link->size, fp, quoted_newname);
- else
- p = replace_attr_refresh_hack (p, link->size, fp, quoted_newname,
- link->refresh_timeout);
-
- DEBUGP (("TO_RELATIVE: %s to %s at position %d in %s.\n",
- link->url->url, newname, link->pos, file));
- xfree (newname);
- xfree (quoted_newname);
- ++to_file_count;
- break;
- }
- case CO_CONVERT_TO_COMPLETE:
- /* Convert the link to absolute URL. */
- {
- char *newlink = link->url->url;
- char *quoted_newlink = html_quote_string (newlink);
-
- if (!link->link_refresh_p)
- p = replace_attr (p, link->size, fp, quoted_newlink);
- else
- p = replace_attr_refresh_hack (p, link->size, fp, quoted_newlink,
- link->refresh_timeout);
-
- DEBUGP (("TO_COMPLETE: <something> to %s at position %d in %s.\n",
- newlink, link->pos, file));
- xfree (quoted_newlink);
- ++to_url_count;
- break;
- }
- case CO_NULLIFY_BASE:
- /* Change the base href to "". */
- p = replace_attr (p, link->size, fp, "");
- break;
- case CO_NOCONVERT:
- abort ();
- break;
- }
- }
-
- /* Output the rest of the file. */
- if (p - fm->content < fm->length)
- fwrite (p, 1, fm->length - (p - fm->content), fp);
- fclose (fp);
- read_file_free (fm);
-
- logprintf (LOG_VERBOSE, "%d-%d\n", to_file_count, to_url_count);
-}
-
-/* Construct and return a malloced copy of the relative link from two
- pieces of information: local name S1 of the referring file and
- local name S2 of the referred file.
-
- So, if S1 is "jagor.srce.hr/index.html" and S2 is
- "jagor.srce.hr/images/news.gif", the function will return
- "images/news.gif".
-
- Alternately, if S1 is "fly.cc.fer.hr/ioccc/index.html", and S2 is
- "fly.cc.fer.hr/images/fly.gif", the function will return
- "../images/fly.gif".
-
- Caveats: S1 should not begin with `/', unless S2 also begins with
- '/'. S1 should not contain things like ".." and such --
- construct_relative ("fly/ioccc/../index.html",
- "fly/images/fly.gif") will fail. (A workaround is to call
- something like path_simplify() on S1). */
-static char *
-construct_relative (const char *s1, const char *s2)
-{
- int i, cnt, sepdirs1;
- char *res;
-
- if (*s2 == '/')
- return xstrdup (s2);
- /* S1 should *not* be absolute, if S2 wasn't. */
- assert (*s1 != '/');
- i = cnt = 0;
- /* Skip the directories common to both strings. */
- while (1)
- {
- while (s1[i] && s2[i]
- && (s1[i] == s2[i])
- && (s1[i] != '/')
- && (s2[i] != '/'))
- ++i;
- if (s1[i] == '/' && s2[i] == '/')
- cnt = ++i;
- else
- break;
- }
- for (sepdirs1 = 0; s1[i]; i++)
- if (s1[i] == '/')
- ++sepdirs1;
- /* Now, construct the file as of:
- - ../ repeated sepdirs1 time
- - all the non-mutual directories of S2. */
- res = (char *)xmalloc (3 * sepdirs1 + strlen (s2 + cnt) + 1);
- for (i = 0; i < sepdirs1; i++)
- memcpy (res + 3 * i, "../", 3);
- strcpy (res + 3 * i, s2 + cnt);
- return res;
-}
-\f
-static void
-write_backup_file (const char *file, downloaded_file_t downloaded_file_return)
-{
- /* Rather than just writing over the original .html file with the
- converted version, save the former to *.orig. Note we only do
- this for files we've _successfully_ downloaded, so we don't
- clobber .orig files sitting around from previous invocations. */
-
- /* Construct the backup filename as the original name plus ".orig". */
- size_t filename_len = strlen(file);
- char* filename_plus_orig_suffix;
- boolean already_wrote_backup_file = FALSE;
- slist* converted_file_ptr;
- static slist* converted_files = NULL;
-
- if (downloaded_file_return == FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED)
- {
- /* Just write "orig" over "html". We need to do it this way
- because when we're checking to see if we've downloaded the
- file before (to see if we can skip downloading it), we don't
- know if it's a text/html file. Therefore we don't know yet
- at that stage that -E is going to cause us to tack on
- ".html", so we need to compare vs. the original URL plus
- ".orig", not the original URL plus ".html.orig". */
- filename_plus_orig_suffix = alloca (filename_len + 1);
- strcpy(filename_plus_orig_suffix, file);
- strcpy((filename_plus_orig_suffix + filename_len) - 4, "orig");
- }
- else /* downloaded_file_return == FILE_DOWNLOADED_NORMALLY */
- {
- /* Append ".orig" to the name. */
- filename_plus_orig_suffix = alloca (filename_len + sizeof(".orig"));
- strcpy(filename_plus_orig_suffix, file);
- strcpy(filename_plus_orig_suffix + filename_len, ".orig");
- }
-
- /* We can get called twice on the same URL thanks to the
- convert_all_links() call in main(). If we write the .orig file
- each time in such a case, it'll end up containing the first-pass
- conversion, not the original file. So, see if we've already been
- called on this file. */
- converted_file_ptr = converted_files;
- while (converted_file_ptr != NULL)
- if (strcmp(converted_file_ptr->string, file) == 0)
- {
- already_wrote_backup_file = TRUE;
- break;
- }
- else
- converted_file_ptr = converted_file_ptr->next;
-
- if (!already_wrote_backup_file)
- {
- /* Rename <file> to <file>.orig before former gets written over. */
- if (rename(file, filename_plus_orig_suffix) != 0)
- logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
- file, filename_plus_orig_suffix, strerror (errno));
-
- /* Remember that we've already written a .orig backup for this file.
- Note that we never free this memory since we need it till the
- convert_all_links() call, which is one of the last things the
- program does before terminating. BTW, I'm not sure if it would be
- safe to just set 'converted_file_ptr->string' to 'file' below,
- rather than making a copy of the string... Another note is that I
- thought I could just add a field to the urlpos structure saying
- that we'd written a .orig file for this URL, but that didn't work,
- so I had to make this separate list.
- -- Dan Harkless <wget@harkless.org>
-
- This [adding a field to the urlpos structure] didn't work
- because convert_file() is called from convert_all_links at
- the end of the retrieval with a freshly built new urlpos
- list.
- -- Hrvoje Niksic <hniksic@arsdigita.com>
- */
- converted_file_ptr = xmalloc(sizeof(*converted_file_ptr));
- converted_file_ptr->string = xstrdup(file); /* die on out-of-mem. */
- converted_file_ptr->next = converted_files;
- converted_files = converted_file_ptr;
- }
-}
-
-static int find_fragment PARAMS ((const char *, int, const char **,
- const char **));
-
-/* Replace an attribute's original text with NEW_TEXT. */
-
-static const char *
-replace_attr (const char *p, int size, FILE *fp, const char *new_text)
-{
- int quote_flag = 0;
- char quote_char = '\"'; /* use "..." for quoting, unless the
- original value is quoted, in which
- case reuse its quoting char. */
- const char *frag_beg, *frag_end;
-
- /* Structure of our string is:
- "...old-contents..."
- <--- size ---> (with quotes)
- OR:
- ...old-contents...
- <--- size --> (no quotes) */
-
- if (*p == '\"' || *p == '\'')
- {
- quote_char = *p;
- quote_flag = 1;
- ++p;
- size -= 2; /* disregard opening and closing quote */
- }
- putc (quote_char, fp);
- fputs (new_text, fp);
-
- /* Look for fragment identifier, if any. */
- if (find_fragment (p, size, &frag_beg, &frag_end))
- fwrite (frag_beg, 1, frag_end - frag_beg, fp);
- p += size;
- if (quote_flag)
- ++p;
- putc (quote_char, fp);
-
- return p;
-}
-
-/* The same as REPLACE_ATTR, but used when replacing
- <meta http-equiv=refresh content="new_text"> because we need to
- append "timeout_value; URL=" before the next_text. */
-
-static const char *
-replace_attr_refresh_hack (const char *p, int size, FILE *fp,
- const char *new_text, int timeout)
-{
- /* "0; URL=..." */
- char *new_with_timeout = (char *)alloca (numdigit (timeout)
- + 6 /* "; URL=" */
- + strlen (new_text)
- + 1);
- sprintf (new_with_timeout, "%d; URL=%s", timeout, new_text);
-
- return replace_attr (p, size, fp, new_with_timeout);
-}
-
-/* Find the first occurrence of '#' in [BEG, BEG+SIZE) that is not
- preceded by '&'. If the character is not found, return zero. If
- the character is found, return 1 and set BP and EP to point to the
- beginning and end of the region.
-
- This is used for finding the fragment indentifiers in URLs. */
-
-static int
-find_fragment (const char *beg, int size, const char **bp, const char **ep)
-{
- const char *end = beg + size;
- int saw_amp = 0;
- for (; beg < end; beg++)
- {
- switch (*beg)
- {
- case '&':
- saw_amp = 1;
- break;
- case '#':
- if (!saw_amp)
- {
- *bp = beg;
- *ep = end;
- return 1;
- }
- /* fallthrough */
- default:
- saw_amp = 0;
- }
- }
- return 0;
-}
-
-/* Quote FILE for use as local reference to an HTML file.
-
- We quote ? as %3F to avoid passing part of the file name as the
- parameter when browsing the converted file through HTTP. However,
- it is safe to do this only when `--html-extension' is turned on.
- This is because converting "index.html?foo=bar" to
- "index.html%3Ffoo=bar" would break local browsing, as the latter
- isn't even recognized as an HTML file! However, converting
- "index.html?foo=bar.html" to "index.html%3Ffoo=bar.html" should be
- safe for both local and HTTP-served browsing. */
-
-static char *
-local_quote_string (const char *file)
-{
- const char *file_sans_qmark;
- int qm;
-
- if (!opt.html_extension)
- return html_quote_string (file);
-
- qm = count_char (file, '?');
-
- if (qm)
- {
- const char *from = file;
- char *to, *newname;
-
- /* qm * 2 because we replace each question mark with "%3F",
- i.e. replace one char with three, hence two more. */
- int fsqlen = strlen (file) + qm * 2;
-
- to = newname = (char *)alloca (fsqlen + 1);
- for (; *from; from++)
- {
- if (*from != '?')
- *to++ = *from;
- else
- {
- *to++ = '%';
- *to++ = '3';
- *to++ = 'F';
- }
- }
- assert (to - newname == fsqlen);
- *to = '\0';
-
- file_sans_qmark = newname;
- }
- else
- file_sans_qmark = file;
-
- return html_quote_string (file_sans_qmark);
-}
-
-/* We're storing "modes" of type downloaded_file_t in the hash table.
- However, our hash tables only accept pointers for keys and values.
- So when we need a pointer, we use the address of a
- downloaded_file_t variable of static storage. */
-
-static downloaded_file_t *
-downloaded_mode_to_ptr (downloaded_file_t mode)
-{
- static downloaded_file_t
- v1 = FILE_NOT_ALREADY_DOWNLOADED,
- v2 = FILE_DOWNLOADED_NORMALLY,
- v3 = FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
- v4 = CHECK_FOR_FILE;
-
- switch (mode)
- {
- case FILE_NOT_ALREADY_DOWNLOADED:
- return &v1;
- case FILE_DOWNLOADED_NORMALLY:
- return &v2;
- case FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED:
- return &v3;
- case CHECK_FOR_FILE:
- return &v4;
- }
- return NULL;
-}
-
-/* This should really be merged with dl_file_url_map and
- downloaded_html_files in recur.c. This was originally a list, but
- I changed it to a hash table beause it was actually taking a lot of
- time to find things in it. */
-
-static struct hash_table *downloaded_files_hash;
-
-/* Remembers which files have been downloaded. In the standard case, should be
- called with mode == FILE_DOWNLOADED_NORMALLY for each file we actually
- download successfully (i.e. not for ones we have failures on or that we skip
- due to -N).
-
- When we've downloaded a file and tacked on a ".html" extension due to -E,
- call this function with FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED rather than
- FILE_DOWNLOADED_NORMALLY.
-
- If you just want to check if a file has been previously added without adding
- it, call with mode == CHECK_FOR_FILE. Please be sure to call this function
- with local filenames, not remote URLs. */
-downloaded_file_t
-downloaded_file (downloaded_file_t mode, const char *file)
-{
- downloaded_file_t *ptr;
-
- if (mode == CHECK_FOR_FILE)
- {
- if (!downloaded_files_hash)
- return FILE_NOT_ALREADY_DOWNLOADED;
- ptr = hash_table_get (downloaded_files_hash, file);
- if (!ptr)
- return FILE_NOT_ALREADY_DOWNLOADED;
- return *ptr;
- }
-
- if (!downloaded_files_hash)
- downloaded_files_hash = make_string_hash_table (0);
-
- ptr = hash_table_get (downloaded_files_hash, file);
- if (ptr)
- return *ptr;
-
- ptr = downloaded_mode_to_ptr (mode);
- hash_table_put (downloaded_files_hash, xstrdup (file), &ptr);
-
- return FILE_NOT_ALREADY_DOWNLOADED;
-}
-
-static int
-df_free_mapper (void *key, void *value, void *ignored)
-{
- xfree (key);
- return 0;
-}
-
-void
-downloaded_files_free (void)
-{
- if (downloaded_files_hash)
- {
- hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
- hash_table_destroy (downloaded_files_hash);
- downloaded_files_hash = NULL;
- }
-}
-
/* Return non-zero if scheme a is similar to scheme b.
Schemes are similar if they are equal. If SSL is supported, schemes
char *passwd;
};
-enum convert_options {
- CO_NOCONVERT = 0, /* don't convert this URL */
- CO_CONVERT_TO_RELATIVE, /* convert to relative, e.g. to
- "../../otherdir/foo.gif" */
- CO_CONVERT_TO_COMPLETE, /* convert to absolute, e.g. to
- "http://orighost/somedir/bar.jpg". */
- CO_NULLIFY_BASE /* change to empty string. */
-};
-
-/* A structure that defines the whereabouts of a URL, i.e. its
- position in an HTML document, etc. */
-
-struct urlpos {
- struct url *url; /* the URL of the link, after it has
- been merged with the base */
- char *local_name; /* local file to which it was saved
- (used by convert_links) */
-
- /* reserved for special links such as <base href="..."> which are
- used when converting links, but ignored when downloading. */
- unsigned int ignore_when_downloading :1;
-
- /* Information about the original link: */
-
- unsigned int link_relative_p :1; /* was the link relative? */
- unsigned int link_complete_p :1; /* was the link complete (with the
- host name, etc.) */
- unsigned int link_base_p :1; /* was the link <base href=...> */
- unsigned int link_inline_p :1; /* needed to render the page. */
-
- unsigned int link_refresh_p :1; /* link was received from
- <meta http-equiv=refresh content=...> */
- int refresh_timeout; /* for reconstructing the refresh. */
-
- /* Conversion requirements: */
- enum convert_options convert; /* is conversion required? */
-
- /* URL's position in the buffer. */
- int pos, size;
-
- struct urlpos *next; /* next list element */
-};
-
-/* downloaded_file() takes a parameter of this type and returns this type. */
-typedef enum
-{
- /* Return enumerators: */
- FILE_NOT_ALREADY_DOWNLOADED = 0,
-
- /* Return / parameter enumerators: */
- FILE_DOWNLOADED_NORMALLY,
- FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
-
- /* Parameter enumerators: */
- CHECK_FOR_FILE
-} downloaded_file_t;
-
/* Function declarations */
char *url_escape PARAMS ((const char *));
void scheme_disable PARAMS ((enum url_scheme));
char *url_string PARAMS ((const struct url *, int));
-
-struct urlpos *get_urls_file PARAMS ((const char *));
-struct urlpos *get_urls_html PARAMS ((const char *, const char *, int *));
-void free_urlpos PARAMS ((struct urlpos *));
+char *url_file_name PARAMS ((const struct url *));
char *uri_merge PARAMS ((const char *, const char *));
-void rotate_backups PARAMS ((const char *));
int mkalldirs PARAMS ((const char *));
-char *url_file_name PARAMS ((const struct url *));
-
-char *getproxy PARAMS ((struct url *));
-int no_proxy_match PARAMS ((const char *, const char **));
-
-void convert_links PARAMS ((const char *, struct urlpos *));
-
-downloaded_file_t downloaded_file PARAMS ((downloaded_file_t, const char *));
char *rewrite_shorthand_url PARAMS ((const char *));
-
int schemes_are_similar_p PARAMS ((enum url_scheme a, enum url_scheme b));
#endif /* URL_H */
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