uerr_t
retrieve_from_file (const char *file, bool html, int *count)
{
uerr_t status;
struct urlpos *url_list, *cur_url;
url_list = (html ? get_urls_html (file, NULL, NULL)
: get_urls_file (file));
status = RETROK; /* Suppose everything is OK. */
*count = 0; /* Reset the URL count. */
for (cur_url = url_list; cur_url; cur_url = cur_url->next, ++*count)
{
char *filename = NULL, *new_file = NULL;
int dt;
if (cur_url->ignore_when_downloading)
continue;
if (opt.quota && total_downloaded_bytes > opt.quota)
{
status = QUOTEXC;
break;
}
if ((opt.recursive || opt.page_requisites)
&& (cur_url->url->scheme != SCHEME_FTP || getproxy (cur_url->url)))
{
int old_follow_ftp = opt.follow_ftp;
/* Turn opt.follow_ftp on in case of recursive FTP retrieval */
if (cur_url->url->scheme == SCHEME_FTP)
opt.follow_ftp = 1;
status = retrieve_tree (cur_url->url->url);
opt.follow_ftp = old_follow_ftp;
}
else
status = retrieve_url (cur_url->url->url, &filename, &new_file, NULL, &dt, opt.recursive);
if (filename && opt.delete_after && file_exists_p (filename))
{
DEBUGP (("\
Removing file due to --delete-after in retrieve_from_file():\n"));
logprintf (LOG_VERBOSE, _("Removing %s.\n"), filename);
if (unlink (filename))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
dt &= ~RETROKF;
}
xfree_null (new_file);
xfree_null (filename);
}
/* Find the URL-s in the file and call retrieve_url() for each of
them. If HTML is non-zero, treat the file as HTML, and construct
the URL-s accordingly.
If opt.recursive is set, call recursive_retrieve() for each file. */
uerr_t
retrieve_from_file (const char *file, int html, int *count)
{
uerr_t status;
urlpos *url_list, *cur_url;
/* If spider-mode is on, we do not want get_urls_html barfing
errors on baseless links. */
url_list = (html ? get_urls_html (file, NULL, opt.spider)
: get_urls_file (file));
status = RETROK; /* Suppose everything is OK. */
*count = 0; /* Reset the URL count. */
recursive_reset ();
for (cur_url = url_list; cur_url; cur_url = cur_url->next, ++*count)
{
char *filename, *new_file;
int dt;
if (opt.quota && opt.downloaded > opt.quota)
{
status = QUOTEXC;
break;
}
status = retrieve_url (cur_url->url, &filename, &new_file, NULL, &dt);
if (opt.recursive && status == RETROK && (dt & TEXTHTML))
status = recursive_retrieve (filename, new_file ? new_file : cur_url->url);
if (filename && opt.delete_after && file_exists_p (filename))
{
logprintf (LOG_VERBOSE, _("Removing %s.\n"), filename);
if (unlink (filename))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
dt &= ~RETROKF;
}
FREE_MAYBE (new_file);
FREE_MAYBE (filename);
}
/* Free the linked list of URL-s. */
free_urlpos (url_list);
return status;
}
static void
convert_links_in_hashtable (struct hash_table *downloaded_set,
int is_css,
int *file_count)
{
int i;
int cnt;
char **file_array;
cnt = 0;
if (downloaded_set)
cnt = hash_table_count (downloaded_set);
if (cnt == 0)
return;
file_array = alloca_array (char *, cnt);
string_set_to_array (downloaded_set, file_array);
for (i = 0; i < cnt; i++)
{
struct urlpos *urls, *cur_url;
char *url;
char *file = file_array[i];
/* Determine the URL of the file. get_urls_{html,css} 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 file... */
urls = is_css ? get_urls_css_file (file, url) :
get_urls_html (file, url, NULL, 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;
struct iri *pi;
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. */
pi = iri_new ();
set_uri_encoding (pi, opt.locale, true);
u = url_parse (cur_url->url->url, NULL, pi, true);
if (!u)
continue;
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));
}
url_free (u);
iri_free (pi);
}
/* Convert the links in the file. */
convert_links (file, urls);
++*file_count;
/* Free the data. */
free_urlpos (urls);
}
}
uerr_t
retrieve_from_file (const char *file, bool html, int *count)
{
uerr_t status;
struct urlpos *url_list, *cur_url;
struct iri *iri = iri_new();
char *input_file, *url_file = NULL;
const char *url = file;
status = RETROK; /* Suppose everything is OK. */
*count = 0; /* Reset the URL count. */
/* sXXXav : Assume filename and links in the file are in the locale */
set_uri_encoding (iri, opt.locale, true);
set_content_encoding (iri, opt.locale);
if (url_valid_scheme (url))
{
int dt,url_err;
uerr_t status;
struct url *url_parsed = url_parse (url, &url_err, iri, true);
if (!url_parsed)
{
char *error = url_error (url, url_err);
logprintf (LOG_NOTQUIET, "%s: %s.\n", url, error);
xfree (error);
return URLERROR;
}
if (!opt.base_href)
opt.base_href = xstrdup (url);
status = retrieve_url (url_parsed, url, &url_file, NULL, NULL, &dt,
false, iri, true);
url_free (url_parsed);
if (!url_file || (status != RETROK))
return status;
if (dt & TEXTHTML)
html = true;
/* If we have a found a content encoding, use it.
* ( == is okay, because we're checking for identical object) */
if (iri->content_encoding != opt.locale)
set_uri_encoding (iri, iri->content_encoding, false);
/* Reset UTF-8 encode status */
iri->utf8_encode = opt.enable_iri;
xfree_null (iri->orig_url);
iri->orig_url = NULL;
input_file = url_file;
}
else
input_file = (char *) file;
url_list = (html ? get_urls_html (input_file, NULL, NULL, iri)
: get_urls_file (input_file));
xfree_null (url_file);
for (cur_url = url_list; cur_url; cur_url = cur_url->next, ++*count)
{
char *filename = NULL, *new_file = NULL;
int dt;
struct iri *tmpiri = iri_dup (iri);
struct url *parsed_url = NULL;
if (cur_url->ignore_when_downloading)
continue;
if (opt.quota && total_downloaded_bytes > opt.quota)
{
status = QUOTEXC;
break;
}
parsed_url = url_parse (cur_url->url->url, NULL, tmpiri, true);
if ((opt.recursive || opt.page_requisites)
&& (cur_url->url->scheme != SCHEME_FTP || getproxy (cur_url->url)))
{
int old_follow_ftp = opt.follow_ftp;
/* Turn opt.follow_ftp on in case of recursive FTP retrieval */
if (cur_url->url->scheme == SCHEME_FTP)
opt.follow_ftp = 1;
status = retrieve_tree (parsed_url ? parsed_url : cur_url->url,
tmpiri);
opt.follow_ftp = old_follow_ftp;
}
else
status = retrieve_url (parsed_url ? parsed_url : cur_url->url,
cur_url->url->url, &filename,
&new_file, NULL, &dt, opt.recursive, tmpiri,
true);
if (parsed_url)
url_free (parsed_url);
if (filename && opt.delete_after && file_exists_p (filename))
{
DEBUGP (("\
Removing file due to --delete-after in retrieve_from_file():\n"));
logprintf (LOG_VERBOSE, _("Removing %s.\n"), filename);
if (unlink (filename))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
dt &= ~RETROKF;
}
xfree_null (new_file);
xfree_null (filename);
iri_free (tmpiri);
}
uerr_t
retrieve_tree (const char *start_url)
{
uerr_t status = RETROK;
/* The queue of URLs we need to load. */
struct url_queue *queue;
/* The URLs we do not wish to enqueue, because they are already in
the queue, but haven't been downloaded yet. */
struct hash_table *blacklist;
int up_error_code;
struct url *start_url_parsed = url_parse (start_url, &up_error_code);
if (!start_url_parsed)
{
logprintf (LOG_NOTQUIET, "%s: %s.\n", start_url,
url_error (up_error_code));
return URLERROR;
}
queue = url_queue_new ();
blacklist = make_string_hash_table (0);
/* Enqueue the starting URL. Use start_url_parsed->url rather than
just URL so we enqueue the canonical form of the URL. */
url_enqueue (queue, xstrdup (start_url_parsed->url), NULL, 0, 1);
string_set_add (blacklist, start_url_parsed->url);
while (1)
{
int descend = 0;
char *url, *referer, *file = NULL;
int depth, html_allowed;
boolean dash_p_leaf_HTML = FALSE;
if (opt.quota && total_downloaded_bytes > opt.quota)
break;
if (status == FWRITEERR)
break;
/* Get the next URL from the queue... */
if (!url_dequeue (queue,
(const char **)&url, (const char **)&referer,
&depth, &html_allowed))
break;
/* ...and download it. Note that this download is in most cases
unconditional, as download_child_p already makes sure a file
doesn't get enqueued twice -- and yet this check is here, and
not in download_child_p. This is so that if you run `wget -r
URL1 URL2', and a random URL is encountered once under URL1
and again under URL2, but at a different (possibly smaller)
depth, we want the URL's children to be taken into account
the second time. */
if (dl_url_file_map && hash_table_contains (dl_url_file_map, url))
{
file = xstrdup (hash_table_get (dl_url_file_map, url));
DEBUGP (("Already downloaded \"%s\", reusing it from \"%s\".\n",
url, file));
if (html_allowed
&& downloaded_html_set
&& string_set_contains (downloaded_html_set, file))
descend = 1;
}
else
{
int dt = 0;
char *redirected = NULL;
int oldrec = opt.recursive;
opt.recursive = 0;
status = retrieve_url (url, &file, &redirected, referer, &dt);
opt.recursive = oldrec;
if (html_allowed && file && status == RETROK
&& (dt & RETROKF) && (dt & TEXTHTML))
descend = 1;
if (redirected)
{
/* We have been redirected, possibly to another host, or
different path, or wherever. Check whether we really
want to follow it. */
if (descend)
{
if (!descend_redirect_p (redirected, url, depth,
start_url_parsed, blacklist))
descend = 0;
else
/* Make sure that the old pre-redirect form gets
blacklisted. */
string_set_add (blacklist, url);
}
xfree (url);
url = redirected;
}
}
if (descend
&& depth >= opt.reclevel && opt.reclevel != INFINITE_RECURSION)
{
if (opt.page_requisites
&& (depth == opt.reclevel || depth == opt.reclevel + 1))
{
/* When -p is specified, we are allowed to exceed the
maximum depth, but only for the "inline" links,
i.e. those that are needed to display the page.
Originally this could exceed the depth at most by
one, but we allow one more level so that the leaf
pages that contain frames can be loaded
correctly. */
dash_p_leaf_HTML = TRUE;
}
else
{
/* Either -p wasn't specified or it was and we've
already spent the two extra (pseudo-)levels that it
affords us, so we need to bail out. */
DEBUGP (("Not descending further; at depth %d, max. %d.\n",
depth, opt.reclevel));
descend = 0;
}
}
/* If the downloaded document was HTML, parse it and enqueue the
links it contains. */
if (descend)
{
int meta_disallow_follow = 0;
struct urlpos *children
= get_urls_html (file, url, &meta_disallow_follow);
if (opt.use_robots && meta_disallow_follow)
{
free_urlpos (children);
children = NULL;
}
if (children)
{
struct urlpos *child = children;
struct url *url_parsed = url_parsed = url_parse (url, NULL);
assert (url_parsed != NULL);
for (; child; child = child->next)
{
if (child->ignore_when_downloading)
continue;
if (dash_p_leaf_HTML && !child->link_inline_p)
continue;
if (download_child_p (child, url_parsed, depth, start_url_parsed,
blacklist))
{
url_enqueue (queue, xstrdup (child->url->url),
xstrdup (url), depth + 1,
child->link_expect_html);
/* We blacklist the URL we have enqueued, because we
don't want to enqueue (and hence download) the
same URL twice. */
string_set_add (blacklist, child->url->url);
}
}
url_free (url_parsed);
free_urlpos (children);
}
}
if (opt.delete_after || (file && !acceptable (file)))
{
/* Either --delete-after was specified, or we loaded this
otherwise rejected (e.g. by -R) HTML file just so we
could harvest its hyperlinks -- in either case, delete
the local file. */
DEBUGP (("Removing file due to %s in recursive_retrieve():\n",
opt.delete_after ? "--delete-after" :
"recursive rejection criteria"));
logprintf (LOG_VERBOSE,
(opt.delete_after
? _("Removing %s.\n")
: _("Removing %s since it should be rejected.\n")),
file);
if (unlink (file))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
register_delete_file (file);
}
xfree (url);
FREE_MAYBE (referer);
FREE_MAYBE (file);
}
/* If anything is left of the queue due to a premature exit, free it
now. */
{
char *d1, *d2;
int d3, d4;
while (url_dequeue (queue,
(const char **)&d1, (const char **)&d2, &d3, &d4))
{
xfree (d1);
FREE_MAYBE (d2);
}
}
url_queue_delete (queue);
if (start_url_parsed)
url_free (start_url_parsed);
string_set_free (blacklist);
if (opt.quota && total_downloaded_bytes > opt.quota)
return QUOTEXC;
else if (status == FWRITEERR)
return FWRITEERR;
else
return RETROK;
}
/* convert_links() is called from recursive_retrieve() after we're
done with an HTML file. This call to convert_links is not complete
because it converts only the downloaded files, and Wget cannot know
which files will be downloaded afterwards. So, if we have file
fileone.html with:
<a href="/c/something.gif">
and /c/something.gif was not downloaded because it exceeded the
recursion depth, the reference will *not* be changed.
However, later we can encounter /c/something.gif from an "upper"
level HTML (let's call it filetwo.html), and it gets downloaded.
But now we have a problem because /c/something.gif will be
correctly transformed in filetwo.html, but not in fileone.html,
since Wget could not have known that /c/something.gif will be
downloaded in the future.
This is why Wget must, after the whole retrieval, call
convert_all_links to go once more through the entire list of
retrieved HTMLs, and re-convert them.
All the downloaded HTMLs are kept in downloaded_html_files, and downloaded URLs
in urls_downloaded. From these two lists information is
extracted. */
void
convert_all_links (void)
{
slist *html;
/* Destructively reverse downloaded_html_files to get it in the right order.
recursive_retrieve() used slist_prepend() consistently. */
downloaded_html_files = slist_nreverse (downloaded_html_files);
for (html = downloaded_html_files; html; html = html->next)
{
urlpos *urls, *cur_url;
char *url;
DEBUGP (("Rescanning %s\n", html->string));
/* Determine the URL of the HTML file. get_urls_html will need
it. */
url = hash_table_get (dl_file_url_map, html->string);
if (url)
DEBUGP (("It should correspond to %s.\n", url));
else
DEBUGP (("I cannot find the corresponding URL.\n"));
/* Parse the HTML file... */
urls = get_urls_html (html->string, url, FALSE, 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;
/* The URL must be in canonical form to be compared. */
struct urlinfo *u = newurl ();
uerr_t res = parseurl (cur_url->url, u, 0);
if (res != URLOK)
{
freeurl (u, 1);
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);
if (local_name)
DEBUGP (("%s marked for conversion, local %s\n",
u->url, local_name));
/* Decide on the conversion direction. */
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);
}
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;
}
freeurl (u, 1);
}
/* Convert the links in the file. */
convert_links (html->string, urls);
/* Free the data. */
free_urlpos (urls);
}
}
/* The core of recursive retrieving. Endless recursion is avoided by
having all URLs stored to a linked list of URLs, which is checked
before loading any URL. That way no URL can get loaded twice.
The function also supports specification of maximum recursion depth
and a number of other goodies. */
uerr_t
recursive_retrieve (const char *file, const char *this_url)
{
char *constr, *filename, *newloc;
char *canon_this_url = NULL;
int dt, inl, dash_p_leaf_HTML = FALSE;
int meta_disallow_follow;
int this_url_ftp; /* See below the explanation */
uerr_t err;
struct urlinfo *rurl;
urlpos *url_list, *cur_url;
char *rfile; /* For robots */
struct urlinfo *u;
assert (this_url != NULL);
assert (file != NULL);
/* If quota was exceeded earlier, bail out. */
if (downloaded_exceeds_quota ())
return QUOTEXC;
/* Cache the current URL in the list. */
if (first_time)
{
/* These three operations need to be done only once per Wget
run. They should probably be at a different location. */
if (!undesirable_urls)
undesirable_urls = make_string_hash_table (0);
hash_table_clear (undesirable_urls);
string_set_add (undesirable_urls, this_url);
/* Enter this_url to the hash table, in original and "enhanced" form. */
u = newurl ();
err = parseurl (this_url, u, 0);
if (err == URLOK)
{
string_set_add (undesirable_urls, u->url);
if (opt.no_parent)
base_dir = xstrdup (u->dir); /* Set the base dir. */
/* Set the canonical this_url to be sent as referer. This
problem exists only when running the first time. */
canon_this_url = xstrdup (u->url);
}
else
{
DEBUGP (("Double yuck! The *base* URL is broken.\n"));
base_dir = NULL;
}
freeurl (u, 1);
depth = 1;
robots_host = NULL;
forbidden = NULL;
first_time = 0;
}
else
++depth;
if (opt.reclevel != INFINITE_RECURSION && depth > opt.reclevel)
/* We've exceeded the maximum recursion depth specified by the user. */
{
if (opt.page_requisites && depth <= opt.reclevel + 1)
/* When -p is specified, we can do one more partial recursion from the
"leaf nodes" on the HTML document tree. The recursion is partial in
that we won't traverse any <A> or <AREA> tags, nor any <LINK> tags
except for <LINK REL="stylesheet">. */
dash_p_leaf_HTML = TRUE;
else
/* Either -p wasn't specified or it was and we've already gone the one
extra (pseudo-)level that it affords us, so we need to bail out. */
{
DEBUGP (("Recursion depth %d exceeded max. depth %d.\n",
depth, opt.reclevel));
--depth;
return RECLEVELEXC;
}
}
/* Determine whether this_url is an FTP URL. If it is, it means
that the retrieval is done through proxy. In that case, FTP
links will be followed by default and recursion will not be
turned off when following them. */
this_url_ftp = (urlproto (this_url) == URLFTP);
/* Get the URL-s from an HTML file: */
url_list = get_urls_html (file, canon_this_url ? canon_this_url : this_url,
dash_p_leaf_HTML, &meta_disallow_follow);
if (opt.use_robots && meta_disallow_follow)
{
/* The META tag says we are not to follow this file. Respect
that. */
free_urlpos (url_list);
url_list = NULL;
}
/* Decide what to do with each of the URLs. A URL will be loaded if
it meets several requirements, discussed later. */
for (cur_url = url_list; cur_url; cur_url = cur_url->next)
{
/* If quota was exceeded earlier, bail out. */
if (downloaded_exceeds_quota ())
break;
/* Parse the URL for convenient use in other functions, as well
as to get the optimized form. It also checks URL integrity. */
u = newurl ();
if (parseurl (cur_url->url, u, 0) != URLOK)
{
DEBUGP (("Yuck! A bad URL.\n"));
freeurl (u, 1);
continue;
}
if (u->proto == URLFILE)
{
DEBUGP (("Nothing to do with file:// around here.\n"));
freeurl (u, 1);
continue;
}
assert (u->url != NULL);
constr = xstrdup (u->url);
/* Several checkings whether a file is acceptable to load:
1. check if URL is ftp, and we don't load it
2. check for relative links (if relative_only is set)
3. check for domain
4. check for no-parent
5. check for excludes && includes
6. check for suffix
7. check for same host (if spanhost is unset), with possible
gethostbyname baggage
8. check for robots.txt
Addendum: If the URL is FTP, and it is to be loaded, only the
domain and suffix settings are "stronger".
Note that .html and (yuck) .htm will get loaded regardless of
suffix rules (but that is remedied later with unlink) unless
the depth equals the maximum depth.
More time- and memory- consuming tests should be put later on
the list. */
/* inl is set if the URL we are working on (constr) is stored in
undesirable_urls. Using it is crucial to avoid unnecessary
repeated continuous hits to the hash table. */
inl = string_set_contains (undesirable_urls, constr);
/* If it is FTP, and FTP is not followed, chuck it out. */
if (!inl)
if (u->proto == URLFTP && !opt.follow_ftp && !this_url_ftp)
{
DEBUGP (("Uh, it is FTP but i'm not in the mood to follow FTP.\n"));
string_set_add (undesirable_urls, constr);
inl = 1;
}
/* If it is absolute link and they are not followed, chuck it
out. */
if (!inl && u->proto != URLFTP)
if (opt.relative_only && !cur_url->link_relative_p)
{
DEBUGP (("It doesn't really look like a relative link.\n"));
string_set_add (undesirable_urls, constr);
inl = 1;
}
/* If its domain is not to be accepted/looked-up, chuck it out. */
if (!inl)
if (!accept_domain (u))
{
DEBUGP (("I don't like the smell of that domain.\n"));
string_set_add (undesirable_urls, constr);
inl = 1;
}
/* Check for parent directory. */
if (!inl && opt.no_parent
/* If the new URL is FTP and the old was not, ignore
opt.no_parent. */
&& !(!this_url_ftp && u->proto == URLFTP))
{
/* Check for base_dir first. */
if (!(base_dir && frontcmp (base_dir, u->dir)))
{
/* Failing that, check for parent dir. */
struct urlinfo *ut = newurl ();
if (parseurl (this_url, ut, 0) != URLOK)
DEBUGP (("Double yuck! The *base* URL is broken.\n"));
else if (!frontcmp (ut->dir, u->dir))
{
/* Failing that too, kill the URL. */
DEBUGP (("Trying to escape parental guidance with no_parent on.\n"));
string_set_add (undesirable_urls, constr);
inl = 1;
}
freeurl (ut, 1);
}
}
/* If the file does not match the acceptance list, or is on the
rejection list, chuck it out. The same goes for the
directory exclude- and include- lists. */
if (!inl && (opt.includes || opt.excludes))
{
if (!accdir (u->dir, ALLABS))
{
DEBUGP (("%s (%s) is excluded/not-included.\n", constr, u->dir));
string_set_add (undesirable_urls, constr);
inl = 1;
}
}
if (!inl)
{
char *suf = NULL;
/* We check for acceptance/rejection rules only for non-HTML
documents. Since we don't know whether they really are
HTML, it will be deduced from (an OR-ed list):
1) u->file is "" (meaning it is a directory)
2) suffix exists, AND:
a) it is "html", OR
b) it is "htm"
If the file *is* supposed to be HTML, it will *not* be
subject to acc/rej rules, unless a finite maximum depth has
been specified and the current depth is the maximum depth. */
if (!
(!*u->file
|| (((suf = suffix (constr)) != NULL)
&& ((!strcmp (suf, "html") || !strcmp (suf, "htm"))
&& ((opt.reclevel != INFINITE_RECURSION) &&
(depth != opt.reclevel))))))
{
if (!acceptable (u->file))
{
DEBUGP (("%s (%s) does not match acc/rej rules.\n",
constr, u->file));
string_set_add (undesirable_urls, constr);
inl = 1;
}
}
FREE_MAYBE (suf);
}
/* Optimize the URL (which includes possible DNS lookup) only
after all other possibilities have been exhausted. */
if (!inl)
{
if (!opt.simple_check)
opt_url (u);
else
{
char *p;
/* Just lowercase the hostname. */
for (p = u->host; *p; p++)
*p = TOLOWER (*p);
xfree (u->url);
u->url = str_url (u, 0);
}
xfree (constr);
constr = xstrdup (u->url);
string_set_add (undesirable_urls, constr);
if (!inl && !((u->proto == URLFTP) && !this_url_ftp))
if (!opt.spanhost && this_url && !same_host (this_url, constr))
{
DEBUGP (("This is not the same hostname as the parent's.\n"));
string_set_add (undesirable_urls, constr);
inl = 1;
}
}
/* What about robots.txt? */
if (!inl && opt.use_robots && u->proto == URLHTTP)
{
/* Since Wget knows about only one set of robot rules at a
time, /robots.txt must be reloaded whenever a new host is
accessed.
robots_host holds the host the current `forbid' variable
is assigned to. */
if (!robots_host || !same_host (robots_host, u->host))
{
FREE_MAYBE (robots_host);
/* Now make robots_host the new host, no matter what the
result will be. So if there is no /robots.txt on the
site, Wget will not retry getting robots all the
time. */
robots_host = xstrdup (u->host);
free_vec (forbidden);
forbidden = NULL;
err = retrieve_robots (constr, ROBOTS_FILENAME);
if (err == ROBOTSOK)
{
rurl = robots_url (constr, ROBOTS_FILENAME);
rfile = url_filename (rurl);
forbidden = parse_robots (rfile);
freeurl (rurl, 1);
xfree (rfile);
}
}
/* Now that we have (or don't have) robots, we can check for
them. */
if (!robots_match (u, forbidden))
{
DEBUGP (("Stuffing %s because %s forbids it.\n", this_url,
ROBOTS_FILENAME));
string_set_add (undesirable_urls, constr);
inl = 1;
}
}
filename = NULL;
/* If it wasn't chucked out, do something with it. */
if (!inl)
{
DEBUGP (("I've decided to load it -> "));
/* Add it to the list of already-loaded URL-s. */
string_set_add (undesirable_urls, constr);
/* Automatically followed FTPs will *not* be downloaded
recursively. */
if (u->proto == URLFTP)
{
/* Don't you adore side-effects? */
opt.recursive = 0;
}
/* Reset its type. */
dt = 0;
/* Retrieve it. */
retrieve_url (constr, &filename, &newloc,
canon_this_url ? canon_this_url : this_url, &dt);
if (u->proto == URLFTP)
{
/* Restore... */
opt.recursive = 1;
}
if (newloc)
{
xfree (constr);
constr = newloc;
}
/* If there was no error, and the type is text/html, parse
it recursively. */
if (dt & TEXTHTML)
{
if (dt & RETROKF)
recursive_retrieve (filename, constr);
}
else
DEBUGP (("%s is not text/html so we don't chase.\n",
filename ? filename: "(null)"));
if (opt.delete_after || (filename && !acceptable (filename)))
/* Either --delete-after was specified, or we loaded this otherwise
rejected (e.g. by -R) HTML file just so we could harvest its
hyperlinks -- in either case, delete the local file. */
{
DEBUGP (("Removing file due to %s in recursive_retrieve():\n",
opt.delete_after ? "--delete-after" :
"recursive rejection criteria"));
logprintf (LOG_VERBOSE,
(opt.delete_after ? _("Removing %s.\n")
: _("Removing %s since it should be rejected.\n")),
filename);
if (unlink (filename))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
dt &= ~RETROKF;
}
/* If everything was OK, and links are to be converted, let's
store the local filename. */
if (opt.convert_links && (dt & RETROKF) && (filename != NULL))
{
cur_url->convert = CO_CONVERT_TO_RELATIVE;
cur_url->local_name = xstrdup (filename);
}
}
else
DEBUGP (("%s already in list, so we don't load.\n", constr));
/* Free filename and constr. */
FREE_MAYBE (filename);
FREE_MAYBE (constr);
freeurl (u, 1);
/* Increment the pbuf for the appropriate size. */
}
if (opt.convert_links && !opt.delete_after)
/* This is merely the first pass: the links that have been
successfully downloaded are converted. In the second pass,
convert_all_links() will also convert those links that have NOT
been downloaded to their canonical form. */
convert_links (file, url_list);
/* Free the linked list of URL-s. */
free_urlpos (url_list);
/* Free the canonical this_url. */
FREE_MAYBE (canon_this_url);
/* Decrement the recursion depth. */
--depth;
if (downloaded_exceeds_quota ())
return QUOTEXC;
else
return RETROK;
}
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);
}
/* Simple calls to convert_links will often fail because only the
downloaded files are converted, and Wget cannot know which files
will be converted in the future. So, if we have file fileone.html
with:
<a href=/c/something.gif>
and /c/something.gif was not downloaded because it exceeded the
recursion depth, the reference will *not* be changed.
However, later we can encounter /c/something.gif from an "upper"
level HTML (let's call it filetwo.html), and it gets downloaded.
But now we have a problem because /c/something.gif will be
correctly transformed in filetwo.html, but not in fileone.html,
since Wget could not have known that /c/something.gif will be
downloaded in the future.
This is why Wget must, after the whole retrieval, call
convert_all_links to go once more through the entire list of
retrieved HTML-s, and re-convert them.
All the downloaded HTMLs are kept in urls_html, and downloaded URLs
in urls_downloaded. From these two lists information is
extracted. */
void
convert_all_links (void)
{
uerr_t res;
urlpos *l1, *l2, *urls;
struct urlinfo *u;
slist *html;
urlpos *urlhtml;
for (html = urls_html; html; html = html->next)
{
DEBUGP (("Rescanning %s\n", html->string));
/* Determine the URL of the HTML file. get_urls_html will need
it. */
for (urlhtml = urls_downloaded; urlhtml; urlhtml = urlhtml->next)
if (!strcmp (urlhtml->local_name, html->string))
break;
if (urlhtml)
DEBUGP (("It should correspond to %s.\n", urlhtml->url));
else
DEBUGP (("I cannot find the corresponding URL.\n"));
/* Parse the HTML file... */
urls = get_urls_html (html->string, urlhtml ? urlhtml->url : NULL, 1);
if (!urls)
continue;
for (l1 = urls; l1; l1 = l1->next)
{
/* The URL must be in canonical form to be compared. */
u = newurl ();
res = parseurl (l1->url, u, 0);
if (res != URLOK)
{
freeurl (u, 1);
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.
Note: not yet implemented; only ABS2REL works. */
for (l2 = urls_downloaded; l2; l2 = l2->next)
if (!strcmp (l2->url, u->url))
{
DEBUGP (("%s flagged for conversion, local %s\n",
l2->url, l2->local_name));
break;
}
/* Clear the flags. */
l1->flags &= ~ (UABS2REL | UREL2ABS);
/* Decide on the conversion direction. */
if (l2)
{
l1->flags |= UABS2REL;
l1->local_name = xstrdup (l2->local_name);
}
else
{
l1->flags |= UREL2ABS;
l1->local_name = NULL;
}
freeurl (u, 1);
}
/* Convert the links in the file. */
convert_links (html->string, urls);
/* Free the data. */
free_urlpos (urls);
}
}
/* The core of recursive retrieving. Endless recursion is avoided by
having all URL-s stored to a linked list of URL-s, which is checked
before loading any URL. That way no URL can get loaded twice.
The function also supports specification of maximum recursion depth
and a number of other goodies. */
uerr_t
recursive_retrieve (const char *file, const char *this_url)
{
char *constr, *filename, *newloc;
char *canon_this_url = NULL;
int dt, inl;
int this_url_ftp; /* See below the explanation */
uerr_t err;
struct urlinfo *rurl;
urlpos *url_list, *cur_url;
char *rfile; /* For robots */
struct urlinfo *u;
assert (this_url != NULL);
assert (file != NULL);
/* If quota was exceeded earlier, bail out. */
if (opt.quota && (opt.downloaded > opt.quota))
return QUOTEXC;
/* Cache the current URL in the list. */
if (first_time)
{
ulist = add_slist (ulist, this_url, 0);
urls_downloaded = NULL;
urls_html = NULL;
/* Enter this_url to the slist, in original and "enhanced" form. */
u = newurl ();
err = parseurl (this_url, u, 0);
if (err == URLOK)
{
ulist = add_slist (ulist, u->url, 0);
urls_downloaded = add_url (urls_downloaded, u->url, file);
urls_html = add_slist (urls_html, file, NOSORT);
if (opt.no_parent)
base_dir = xstrdup (u->dir); /* Set the base dir. */
/* Set the canonical this_url to be sent as referer. This
problem exists only when running the first time. */
canon_this_url = xstrdup (u->url);
}
else
{
DEBUGP (("Double yuck! The *base* URL is broken.\n"));
base_dir = NULL;
}
freeurl (u, 1);
depth = 1;
robots_host = NULL;
forbidden = NULL;
first_time = 0;
}
else
++depth;
/* Bail out if opt.reclevel is exceeded. */
if ((opt.reclevel != 0) && (depth > opt.reclevel))
{
DEBUGP (("Recursion depth %d exceeded max. depth %d.\n",
depth, opt.reclevel));
--depth;
return RECLEVELEXC;
}
/* Determine whether this_url is an FTP URL. If it is, it means
that the retrieval is done through proxy. In that case, FTP
links will be followed by default and recursion will not be
turned off when following them. */
this_url_ftp = (urlproto (this_url) == URLFTP);
/* Get the URL-s from an HTML file: */
url_list = get_urls_html (file,
canon_this_url ? canon_this_url : this_url, 0);
/* Decide what to do with each of the URLs. A URL will be loaded if
it meets several requirements, discussed later. */
for (cur_url = url_list; cur_url; cur_url = cur_url->next)
{
/* If quota was exceeded earlier, bail out. */
if (opt.quota && (opt.downloaded > opt.quota))
break;
/* Parse the URL for convenient use in other functions, as well
as to get the optimized form. It also checks URL integrity. */
u = newurl ();
if (parseurl (cur_url->url, u, 0) != URLOK)
{
DEBUGP (("Yuck! A bad URL.\n"));
freeurl (u, 1);
continue;
}
if (u->proto == URLFILE)
{
DEBUGP (("Nothing to do with file:// around here.\n"));
freeurl (u, 1);
continue;
}
assert (u->url != NULL);
constr = xstrdup (u->url);
/* Several checkings whether a file is acceptable to load:
1. check if URL is ftp, and we don't load it
2. check for relative links (if relative_only is set)
3. check for domain
4. check for no-parent
5. check for excludes && includes
6. check for suffix
7. check for same host (if spanhost is unset), with possible
gethostbyname baggage
8. check for robots.txt
Addendum: If the URL is FTP, and it is to be loaded, only the
domain and suffix settings are "stronger".
Note that .html and (yuck) .htm will get loaded
regardless of suffix rules (but that is remedied later with
unlink).
More time- and memory- consuming tests should be put later on
the list. */
/* inl is set if the URL we are working on (constr) is stored in
ulist. Using it is crucial to avoid the incessant calls to
in_slist, which is quite slow. */
inl = in_slist (ulist, constr);
/* If it is FTP, and FTP is not followed, chuck it out. */
if (!inl)
if (u->proto == URLFTP && !opt.follow_ftp && !this_url_ftp)
{
DEBUGP (("Uh, it is FTP but i'm not in the mood to follow FTP.\n"));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
/* If it is absolute link and they are not followed, chuck it
out. */
if (!inl && u->proto != URLFTP)
if (opt.relative_only && !(cur_url->flags & URELATIVE))
{
DEBUGP (("It doesn't really look like a relative link.\n"));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
/* If its domain is not to be accepted/looked-up, chuck it out. */
if (!inl)
if (!accept_domain (u))
{
DEBUGP (("I don't like the smell of that domain.\n"));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
/* Check for parent directory. */
if (!inl && opt.no_parent
/* If the new URL is FTP and the old was not, ignore
opt.no_parent. */
&& !(!this_url_ftp && u->proto == URLFTP))
{
/* Check for base_dir first. */
if (!(base_dir && frontcmp (base_dir, u->dir)))
{
/* Failing that, check for parent dir. */
struct urlinfo *ut = newurl ();
if (parseurl (this_url, ut, 0) != URLOK)
DEBUGP (("Double yuck! The *base* URL is broken.\n"));
else if (!frontcmp (ut->dir, u->dir))
{
/* Failing that too, kill the URL. */
DEBUGP (("Trying to escape parental guidance with no_parent on.\n"));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
freeurl (ut, 1);
}
}
/* If the file does not match the acceptance list, or is on the
rejection list, chuck it out. The same goes for the
directory exclude- and include- lists. */
if (!inl && (opt.includes || opt.excludes))
{
if (!accdir (u->dir, ALLABS))
{
DEBUGP (("%s (%s) is excluded/not-included.\n", constr, u->dir));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
}
if (!inl)
{
char *suf = NULL;
/* We check for acceptance/rejection rules only for non-HTML
documents. Since we don't know whether they really are
HTML, it will be deduced from (an OR-ed list):
1) u->file is "" (meaning it is a directory)
2) suffix exists, AND:
a) it is "html", OR
b) it is "htm"
If the file *is* supposed to be HTML, it will *not* be
subject to acc/rej rules. That's why the `!'. */
if (!
(!*u->file
|| (((suf = suffix (constr)) != NULL)
&& (!strcmp (suf, "html") || !strcmp (suf, "htm")))))
{
if (!acceptable (u->file))
{
DEBUGP (("%s (%s) does not match acc/rej rules.\n",
constr, u->file));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
}
FREE_MAYBE (suf);
}
/* Optimize the URL (which includes possible DNS lookup) only
after all other possibilities have been exhausted. */
if (!inl)
{
if (!opt.simple_check)
opt_url (u);
else
{
char *p;
/* Just lowercase the hostname. */
for (p = u->host; *p; p++)
*p = tolower (*p);
free (u->url);
u->url = str_url (u, 0);
}
free (constr);
constr = xstrdup (u->url);
inl = in_slist (ulist, constr);
if (!inl && !((u->proto == URLFTP) && !this_url_ftp))
if (!opt.spanhost && this_url && !same_host (this_url, constr))
{
DEBUGP (("This is not the same hostname as the parent's.\n"));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
}
/* What about robots.txt? */
if (!inl && opt.use_robots && u->proto == URLHTTP)
{
/* Since Wget knows about only one set of robot rules at a
time, /robots.txt must be reloaded whenever a new host is
accessed.
robots_host holds the host the current `forbid' variable
is assigned to. */
if (!robots_host || !same_host (robots_host, u->host))
{
FREE_MAYBE (robots_host);
/* Now make robots_host the new host, no matter what the
result will be. So if there is no /robots.txt on the
site, Wget will not retry getting robots all the
time. */
robots_host = xstrdup (u->host);
free_vec (forbidden);
forbidden = NULL;
err = retrieve_robots (constr, ROBOTS_FILENAME);
if (err == ROBOTSOK)
{
rurl = robots_url (constr, ROBOTS_FILENAME);
rfile = url_filename (rurl);
forbidden = parse_robots (rfile);
freeurl (rurl, 1);
free (rfile);
}
}
/* Now that we have (or don't have) robots, we can check for
them. */
if (!robots_match (u, forbidden))
{
DEBUGP (("Stuffing %s because %s forbids it.\n", this_url,
ROBOTS_FILENAME));
ulist = add_slist (ulist, constr, 0);
inl = 1;
}
}
filename = NULL;
/* If it wasn't chucked out, do something with it. */
if (!inl)
{
DEBUGP (("I've decided to load it -> "));
/* Add it to the list of already-loaded URL-s. */
ulist = add_slist (ulist, constr, 0);
/* Automatically followed FTPs will *not* be downloaded
recursively. */
if (u->proto == URLFTP)
{
/* Don't you adore side-effects? */
opt.recursive = 0;
}
/* Reset its type. */
dt = 0;
/* Retrieve it. */
retrieve_url (constr, &filename, &newloc,
canon_this_url ? canon_this_url : this_url, &dt);
if (u->proto == URLFTP)
{
/* Restore... */
opt.recursive = 1;
}
if (newloc)
{
free (constr);
constr = newloc;
}
/* In case of convert_links: If there was no error, add it to
the list of downloaded URLs. We might need it for
conversion. */
if (opt.convert_links && filename)
{
if (dt & RETROKF)
{
urls_downloaded = add_url (urls_downloaded, constr, filename);
/* If the URL is HTML, note it. */
if (dt & TEXTHTML)
urls_html = add_slist (urls_html, filename, NOSORT);
}
}
/* If there was no error, and the type is text/html, parse
it recursively. */
if (dt & TEXTHTML)
{
if (dt & RETROKF)
recursive_retrieve (filename, constr);
}
else
DEBUGP (("%s is not text/html so we don't chase.\n",
filename ? filename: "(null)"));
/* If an suffix-rejected file was loaded only because it was HTML,
undo the error now */
if (opt.delete_after || (filename && !acceptable (filename)))
{
logprintf (LOG_VERBOSE,
(opt.delete_after ? _("Removing %s.\n")
: _("Removing %s since it should be rejected.\n")),
filename);
if (unlink (filename))
logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
dt &= ~RETROKF;
}
/* If everything was OK, and links are to be converted, let's
store the local filename. */
if (opt.convert_links && (dt & RETROKF) && (filename != NULL))
{
cur_url->flags |= UABS2REL;
cur_url->local_name = xstrdup (filename);
}
}
DEBUGP (("%s already in list, so we don't load.\n", constr));
/* Free filename and constr. */
FREE_MAYBE (filename);
FREE_MAYBE (constr);
freeurl (u, 1);
/* Increment the pbuf for the appropriate size. */
}
if (opt.convert_links)
convert_links (file, url_list);
/* Free the linked list of URL-s. */
free_urlpos (url_list);
/* Free the canonical this_url. */
FREE_MAYBE (canon_this_url);
/* Decrement the recursion depth. */
--depth;
if (opt.quota && (opt.downloaded > opt.quota))
return QUOTEXC;
else
return RETROK;
}