- else
- return !sufmatch (no_proxy, host);
-}
-\f
-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;
- }
- }
projects / wget / blobdiff