address and the length of the string. Return NULL if no URL is
found. */
const char *
-htmlfindurl (const char *buf, int bufsize, int *size, int init)
+htmlfindurl (const char *buf, int bufsize, int *size, int init,
+ int dash_p_leaf_HTML)
{
const char *p, *ph;
- state_t *s;
+ state_t *s = &global_state;
+
/* NULL-terminated list of tags and modifiers someone would want to
follow -- feel free to edit to suit your needs: */
static struct tag_attr html_allow[] = {
- { "a", "href" },
- { "link", "href" },
{ "script", "src" },
{ "img", "src" },
{ "img", "href" },
{ "script", "src" },
{ "embed", "src" },
{ "bgsound", "src" },
- { "area", "href" },
{ "img", "lowsrc" },
{ "input", "src" },
{ "layer", "src" },
{ "th", "background"},
{ "td", "background"},
/* Tags below this line are treated specially. */
+ { "a", "href" },
+ { "area", "href" },
{ "base", "href" },
+ { "link", "href" },
+ { "link", "rel" },
{ "meta", "content" },
{ NULL, NULL }
};
- s = &global_state;
-
if (init)
{
DEBUGP (("Resetting a parser state.\n"));
while (1)
{
+ const char* link_href = NULL;
+ const char* link_rel = NULL;
+ int link_href_saved_size;
+
if (!bufsize)
break;
/* Let's look for a tag, if we are not already in one. */
/* Now we must skip the spaces to find '='. */
if (*buf != '=')
{
- for (; bufsize && ISSPACE (*buf) && *buf != '>'; ++buf, --bufsize);
+ for (; bufsize && ISSPACE (*buf) && *buf != '>';
+ ++buf, --bufsize);
if (!bufsize || *buf == '>')
break;
}
else
{
p = buf;
- for (; bufsize && !ISSPACE (*buf) && *buf != '>'; ++buf, --bufsize)
+ for (; bufsize && !ISSPACE (*buf) && *buf != '>';
+ ++buf, --bufsize)
if (ph && *buf == '#')
ph = buf;
if (!bufsize)
2) its tag and attribute are found in html_allow. */
if (*size && idmatch (html_allow, s->tag, s->attr))
{
- if (!strcasecmp (s->tag, "base") && !strcasecmp (s->attr, "href"))
+ if (strcasecmp(s->tag, "a") == EQ ||
+ strcasecmp(s->tag, "area") == EQ)
+ {
+ /* Only follow these if we're not at a -p leaf node, as they
+ always link to external documents. */
+ if (!dash_p_leaf_HTML)
+ {
+ s->at_value = 1;
+ return p;
+ }
+ }
+ else if (!strcasecmp (s->tag, "base") &&
+ !strcasecmp (s->attr, "href"))
{
FREE_MAYBE (s->base);
s->base = strdupdelim (p, buf);
}
- else if (!strcasecmp (s->tag, "meta") && !strcasecmp (s->attr, "content"))
+ else if (strcasecmp(s->tag, "link") == EQ)
+ {
+ if (strcasecmp(s->attr, "href") == EQ)
+ {
+ link_href = p;
+ link_href_saved_size = *size; /* for restoration below */
+ }
+ else if (strcasecmp(s->attr, "rel") == EQ)
+ link_rel = p;
+
+ if (link_href != NULL && link_rel != NULL)
+ /* Okay, we've now seen this <LINK> tag's HREF and REL
+ attributes (they may be in either order), so it's now
+ possible to decide if we want to traverse it. */
+ if (!dash_p_leaf_HTML ||
+ strncasecmp(link_rel, "stylesheet",
+ sizeof("stylesheet") - 1) == EQ)
+ /* In the normal case, all <LINK> tags are fair game.
+
+ In the special case of when -p is active, however, and
+ we're at a leaf node (relative to the -l max. depth) in
+ the HTML document tree, the only <LINK> tag we'll
+ follow is a <LINK REL="stylesheet">, as it's necessary
+ for displaying this document properly. We won't follow
+ other <LINK> tags, like <LINK REL="home">, for
+ instance, as they refer to external documents.
+
+ Note that the above strncasecmp() will incorrectly
+ consider something like '<LINK REL="stylesheet.old"' as
+ equivalent to '<LINK REL="stylesheet"'. Not really
+ worth the trouble to explicitly check for such cases --
+ if time is spent, it should be spent ripping out wget's
+ somewhat kludgy HTML parser and hooking in a real,
+ componentized one. */
+ {
+ /* When we return, the 'size' IN/OUT parameter
+ determines where in the buffer the end of the current
+ attribute value is. If REL came after HREF in this
+ <LINK> tag, size is currently set to the size for
+ REL's value -- set it to what it was when we were
+ looking at HREF's value. */
+ *size = link_href_saved_size;
+
+ s->at_value = 1;
+ return link_href;
+ }
+ }
+ else if (!strcasecmp (s->tag, "meta") &&
+ !strcasecmp (s->attr, "content"))
{
/* Some pages use a META tag to specify that the page
be refreshed by a new page after a given number of
for (; *size && ISDIGIT (*p); p++, *size -= 1);
if (*p == ';')
{
- for (p++, *size -= 1; *size && ISSPACE (*p); p++, *size -= 1) ;
+ for (p++, *size -= 1;
+ *size && ISSPACE (*p);
+ p++, *size -= 1) ;
if (!strncasecmp (p, "URL=", 4))
{
p += 4, *size -= 4;
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