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feeditem_atom: support xml:base for enclosures and entry content

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UrlHelper::rewrite_relative: use base URL path if relative url path is not absolute (experimental)
This commit is contained in:
Andrew Dolgov
2021-05-21 15:39:41 +03:00
parent d09a64d6f9
commit dff479af64
3 changed files with 60 additions and 16 deletions
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51
classes/feeditem/atom.php
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@@ -60,43 +60,76 @@ class FeedItem_Atom extends FeedItem_Common {
}
}
/** $base is optional (returns $content if $base is null), $content is an HTML string */
private function rewrite_content_to_base($base, $content) {
if (!empty($base) && !empty($content)) {
$tmpdoc = new DOMDocument();
if (@$tmpdoc->loadHTML('<?xml encoding="UTF-8">' . $content)) {
$tmpxpath = new DOMXPath($tmpdoc);
$elems = $tmpxpath->query("(//*[@href]|//*[@src])");
foreach ($elems as $elem) {
if ($elem->hasAttribute("href")) {
$elem->setAttribute("href",
UrlHelper::rewrite_relative($base, $elem->getAttribute("href")));
} else if ($elem->hasAttribute("src")) {
$elem->setAttribute("src",
UrlHelper::rewrite_relative($base, $elem->getAttribute("src")));
}
}
return $tmpdoc->saveXML();
}
}
return $content;
}
function get_content() {
$content = $this->elem->getElementsByTagName("content")->item(0);
if ($content) {
$base = $this->xpath->evaluate("string(ancestor-or-self::*[@xml:base][1]/@xml:base)", $content);
if ($content->hasAttribute('type')) {
if ($content->getAttribute('type') == 'xhtml') {
for ($i = 0; $i < $content->childNodes->length; $i++) {
$child = $content->childNodes->item($i);
if ($child->hasChildNodes()) {
return $this->doc->saveHTML($child);
return $this->rewrite_content_to_base($base, $this->doc->saveHTML($child));
}
}
}
}
return $this->subtree_or_text($content);
return $this->rewrite_content_to_base($base, $this->subtree_or_text($content));
}
}
// TODO: duplicate code should be merged with get_content()
function get_description() {
$content = $this->elem->getElementsByTagName("summary")->item(0);
if ($content) {
$base = $this->xpath->evaluate("string(ancestor-or-self::*[@xml:base][1]/@xml:base)", $content);
if ($content->hasAttribute('type')) {
if ($content->getAttribute('type') == 'xhtml') {
for ($i = 0; $i < $content->childNodes->length; $i++) {
$child = $content->childNodes->item($i);
if ($child->hasChildNodes()) {
return $this->doc->saveHTML($child);
return $this->rewrite_content_to_base($base, $this->doc->saveHTML($child));
}
}
}
}
return $this->subtree_or_text($content);
return $this->rewrite_content_to_base($base, $this->subtree_or_text($content));
}
}
@@ -122,16 +155,22 @@ class FeedItem_Atom extends FeedItem_Common {
function get_enclosures() {
$links = $this->elem->getElementsByTagName("link");
$encs = array();
$encs = [];
foreach ($links as $link) {
if ($link && $link->hasAttribute("href") && $link->hasAttribute("rel")) {
$base = $this->xpath->evaluate("string(ancestor-or-self::*[@xml:base][1]/@xml:base)", $link);
if ($link->getAttribute("rel") == "enclosure") {
$enc = new FeedEnclosure();
$enc->type = clean($link->getAttribute("type"));
$enc->link = clean($link->getAttribute("href"));
$enc->length = clean($link->getAttribute("length"));
$enc->link = clean($link->getAttribute("href"));
if (!empty($base)) {
$enc->link = UrlHelper::rewrite_relative($base, $enc->link);
}
array_push($encs, $enc);
}