<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>[210914] trunk</title>
</head>
<body>

<style type="text/css"><!--
#msg dl.meta { border: 1px #006 solid; background: #369; padding: 6px; color: #fff; }
#msg dl.meta dt { float: left; width: 6em; font-weight: bold; }
#msg dt:after { content:':';}
#msg dl, #msg dt, #msg ul, #msg li, #header, #footer, #logmsg { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt;  }
#msg dl a { font-weight: bold}
#msg dl a:link    { color:#fc3; }
#msg dl a:active  { color:#ff0; }
#msg dl a:visited { color:#cc6; }
h3 { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt; font-weight: bold; }
#msg pre { overflow: auto; background: #ffc; border: 1px #fa0 solid; padding: 6px; }
#logmsg { background: #ffc; border: 1px #fa0 solid; padding: 1em 1em 0 1em; }
#logmsg p, #logmsg pre, #logmsg blockquote { margin: 0 0 1em 0; }
#logmsg p, #logmsg li, #logmsg dt, #logmsg dd { line-height: 14pt; }
#logmsg h1, #logmsg h2, #logmsg h3, #logmsg h4, #logmsg h5, #logmsg h6 { margin: .5em 0; }
#logmsg h1:first-child, #logmsg h2:first-child, #logmsg h3:first-child, #logmsg h4:first-child, #logmsg h5:first-child, #logmsg h6:first-child { margin-top: 0; }
#logmsg ul, #logmsg ol { padding: 0; list-style-position: inside; margin: 0 0 0 1em; }
#logmsg ul { text-indent: -1em; padding-left: 1em; }#logmsg ol { text-indent: -1.5em; padding-left: 1.5em; }
#logmsg > ul, #logmsg > ol { margin: 0 0 1em 0; }
#logmsg pre { background: #eee; padding: 1em; }
#logmsg blockquote { border: 1px solid #fa0; border-left-width: 10px; padding: 1em 1em 0 1em; background: white;}
#logmsg dl { margin: 0; }
#logmsg dt { font-weight: bold; }
#logmsg dd { margin: 0; padding: 0 0 0.5em 0; }
#logmsg dd:before { content:'\00bb';}
#logmsg table { border-spacing: 0px; border-collapse: collapse; border-top: 4px solid #fa0; border-bottom: 1px solid #fa0; background: #fff; }
#logmsg table th { text-align: left; font-weight: normal; padding: 0.2em 0.5em; border-top: 1px dotted #fa0; }
#logmsg table td { text-align: right; border-top: 1px dotted #fa0; padding: 0.2em 0.5em; }
#logmsg table thead th { text-align: center; border-bottom: 1px solid #fa0; }
#logmsg table th.Corner { text-align: left; }
#logmsg hr { border: none 0; border-top: 2px dashed #fa0; height: 1px; }
#header, #footer { color: #fff; background: #636; border: 1px #300 solid; padding: 6px; }
#patch { width: 100%; }
#patch h4 {font-family: verdana,arial,helvetica,sans-serif;font-size:10pt;padding:8px;background:#369;color:#fff;margin:0;}
#patch .propset h4, #patch .binary h4 {margin:0;}
#patch pre {padding:0;line-height:1.2em;margin:0;}
#patch .diff {width:100%;background:#eee;padding: 0 0 10px 0;overflow:auto;}
#patch .propset .diff, #patch .binary .diff  {padding:10px 0;}
#patch span {display:block;padding:0 10px;}
#patch .modfile, #patch .addfile, #patch .delfile, #patch .propset, #patch .binary, #patch .copfile {border:1px solid #ccc;margin:10px 0;}
#patch ins {background:#dfd;text-decoration:none;display:block;padding:0 10px;}
#patch del {background:#fdd;text-decoration:none;display:block;padding:0 10px;}
#patch .lines, .info {color:#888;background:#fff;}
--></style>
<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/210914">210914</a></dd>
<dt>Author</dt> <dd>yoav@yoav.ws</dd>
<dt>Date</dt> <dd>2017-01-18 23:13:54 -0800 (Wed, 18 Jan 2017)</dd>
</dl>

<h3>Log Message</h3>
<pre>Add Link header support for preload.
https://bugs.webkit.org/show_bug.cgi?id=165521

Reviewed by Alex Christensen.

Source/WebCore:

This patch adds Link header support for preload, by adding a Link
header parser, and calling it from FrameLoader::receivedFirstData.

Test: http/tests/preload/download_resources_from_header.php

* CMakeLists.txt: Add LinkHeader files.
* WebCore.xcodeproj/project.pbxproj: Add LinkHeader files.
* loader/FrameLoader.cpp:
(WebCore::receivedFirstData): Trigger Link based preloading by calling loadLinksFromHeader.
* loader/LinkHeader.cpp: Added.
(WebCore::isWhitespace):
(WebCore::isValidURLChar):
(WebCore::isValidParameterNameChar):
(WebCore::isValidParameterValueEnd):
(WebCore::isValidParameterValueChar):
(WebCore::isExtensionParameter):
(WebCore::parseURL):
(WebCore::invalidParameterDelimiter):
(WebCore::validFieldEnd):
(WebCore::parseParameterDelimiter):
(WebCore::paramterNameFromString):
(WebCore::parseParameterName):
(WebCore::skipQuotesIfNeeded):
(WebCore::parseParameterValue):
(WebCore::LinkHeader::setValue):
(WebCore::findNextHeader):
(WebCore::LinkHeader::LinkHeader):
(WebCore::LinkHeaderSet::LinkHeaderSet):
(WebCore::LinkHeaderSet::init):
* loader/LinkHeader.h: Added.
(WebCore::LinkHeader::url):
(WebCore::LinkHeader::rel):
(WebCore::LinkHeader::as):
(WebCore::LinkHeader::mimeType):
(WebCore::LinkHeader::media):
(WebCore::LinkHeader::crossOrigin):
(WebCore::LinkHeader::valid):
(WebCore::LinkHeaderSet::begin):
(WebCore::LinkHeaderSet::end):
(WebCore::LinkHeaderSet::operator[]):
(WebCore::LinkHeaderSet::size):
* loader/LinkLoader.cpp:
(WebCore::LinkLoader::loadLinksFromHeader): Loads link preload directives that arrive from Link headers.
(WebCore::LinkLoader::preloadIfNeeded): Add return value.
* loader/LinkLoader.h:
* platform/network/HTTPHeaderNames.in: Add &quot;Link&quot; as a header name.

LayoutTests:

* http/tests/preload/download_resources_from_header_iframe-expected.txt: Added
* http/tests/preload/download_resources_from_header_iframe.html: Added
* http/tests/preload/download_resources_from_invalid_headers-expected: Added
* http/tests/preload/download_resources_from_invalid_headers.html: Added
* http/tests/preload/resources/download_resources_from_header.php: Added.
* http/tests/preload/resources/invalid_resources_from_header.php: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreCMakeListstxt">trunk/Source/WebCore/CMakeLists.txt</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreWebCorexcodeprojprojectpbxproj">trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj</a></li>
<li><a href="#trunkSourceWebCoreloaderFrameLoadercpp">trunk/Source/WebCore/loader/FrameLoader.cpp</a></li>
<li><a href="#trunkSourceWebCoreloaderLinkLoadercpp">trunk/Source/WebCore/loader/LinkLoader.cpp</a></li>
<li><a href="#trunkSourceWebCoreloaderLinkLoaderh">trunk/Source/WebCore/loader/LinkLoader.h</a></li>
<li><a href="#trunkSourceWebCoreplatformnetworkHTTPHeaderNamesin">trunk/Source/WebCore/platform/network/HTTPHeaderNames.in</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestshttptestspreloaddownload_resources_from_header_iframeexpectedtxt">trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe-expected.txt</a></li>
<li><a href="#trunkLayoutTestshttptestspreloaddownload_resources_from_header_iframehtml">trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe.html</a></li>
<li><a href="#trunkLayoutTestshttptestspreloaddownload_resources_from_invalid_headersexpectedtxt">trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers-expected.txt</a></li>
<li><a href="#trunkLayoutTestshttptestspreloaddownload_resources_from_invalid_headershtml">trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers.html</a></li>
<li><a href="#trunkLayoutTestshttptestspreloadresourcesdownload_resources_from_headerphp">trunk/LayoutTests/http/tests/preload/resources/download_resources_from_header.php</a></li>
<li><a href="#trunkLayoutTestshttptestspreloadresourcesinvalid_resources_from_headerphp">trunk/LayoutTests/http/tests/preload/resources/invalid_resources_from_header.php</a></li>
<li><a href="#trunkSourceWebCoreloaderLinkHeadercpp">trunk/Source/WebCore/loader/LinkHeader.cpp</a></li>
<li><a href="#trunkSourceWebCoreloaderLinkHeaderh">trunk/Source/WebCore/loader/LinkHeader.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/LayoutTests/ChangeLog        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2017-01-18  Yoav Weiss  &lt;yoav@yoav.ws&gt;
+
+        Add Link header support for preload.
+        https://bugs.webkit.org/show_bug.cgi?id=165521
+
+        Reviewed by Alex Christensen.
+
+        * http/tests/preload/download_resources_from_header_iframe-expected.txt: Added
+        * http/tests/preload/download_resources_from_header_iframe.html: Added
+        * http/tests/preload/download_resources_from_invalid_headers-expected: Added
+        * http/tests/preload/download_resources_from_invalid_headers.html: Added
+        * http/tests/preload/resources/download_resources_from_header.php: Added.
+        * http/tests/preload/resources/invalid_resources_from_header.php: Added.
+
</ins><span class="cx"> 2017-01-18  Joseph Pecoraro  &lt;pecoraro@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Web Inspector: console.table only works for the first 5 properties
</span></span></pre></div>
<a id="trunkLayoutTestshttptestspreloaddownload_resources_from_header_iframeexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe-expected.txt (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe-expected.txt                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe-expected.txt        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,18 @@
</span><ins>+CONSOLE MESSAGE: &lt;link rel=preload&gt; must have a valid `as` value
+
+
+--------
+Frame: '&lt;!--framePath //&lt;!--frame0--&gt;--&gt;'
+--------
+PASS internals.isPreloaded('../resources/dummy.js'); is true
+PASS internals.isPreloaded('../resources/dummy.css'); is true
+PASS internals.isPreloaded('../resources/square.png'); is true
+PASS internals.isPreloaded('../resources/Ahem.ttf'); is true
+PASS internals.isPreloaded('../resources/test.mp4'); is true
+PASS internals.isPreloaded('../security/resources/captions.vtt'); is true
+PASS internals.isPreloaded('../resources/dummy.xml?badvalue'); is false
+PASS internals.isPreloaded('../resources/dummy.xml'); is true
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestshttptestspreloaddownload_resources_from_header_iframehtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe.html (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe.html                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/download_resources_from_header_iframe.html        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,11 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;script&gt;
+    if (window.internals)
+        window.internals.setLinkPreloadSupport(true);
+    if (window.testRunner) {
+        testRunner.dumpAsText();
+        testRunner.dumpChildFramesAsText();
+    }
+&lt;/script&gt;
+&lt;iframe src=&quot;resources/download_resources_from_header.php&quot;&gt;
+
</ins></span></pre></div>
<a id="trunkLayoutTestshttptestspreloaddownload_resources_from_invalid_headersexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers-expected.txt (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers-expected.txt                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers-expected.txt        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+CONSOLE MESSAGE: Refused to load http://localhost:8000/preload/resources/square.png because it does not appear in the img-src directive of the Content Security Policy.
+
+
+--------
+Frame: '&lt;!--framePath //&lt;!--frame0--&gt;--&gt;'
+--------
+PASS internals.isPreloaded('../resources/dummy.js'); is true
+PASS internals.isPreloaded('../משאבים/dummy.css'); is false
+PASS internals.isPreloaded('../résôûrcès/square.png'); is false
+PASS internals.isPreloaded('../resources/Ahem{.ttf,.woff}'); is true
+PASS internals.isPreloaded('../resources/test.mp4'); is false
+PASS internals.isPreloaded('../resources/test .mp4'); is true
+PASS internals.isPreloaded('../security/resources/cap        tions.vtt'); is true
+PASS internals.isPreloaded('../resources/dummy.xml?badvalue'); is false
+PASS internals.isPreloaded('../resources/dummy   .xml'); is true
+PASS internals.isPreloaded('../resources/dummy.xml'); is false
+PASS internals.isPreloaded('../resources/dumm'); is false
+PASS internals.isPreloaded('http://localhost:8000/preload/resources/square.png'); is false
+PASS internals.isPreloaded('http://localhost:53/preload/resources/dummy.js'); is true
+PASS internals.isPreloaded('#foobar'); is false
+PASS internals.isPreloaded('../resources/Ahem.ttf'); is false
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestshttptestspreloaddownload_resources_from_invalid_headershtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers.html (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers.html                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/download_resources_from_invalid_headers.html        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,11 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;script&gt;
+    if (window.internals)
+        window.internals.setLinkPreloadSupport(true);
+    if (window.testRunner) {
+        testRunner.dumpAsText();
+        testRunner.dumpChildFramesAsText();
+    }
+&lt;/script&gt;
+&lt;iframe src=&quot;resources/invalid_resources_from_header.php&quot;&gt;
+
</ins></span></pre></div>
<a id="trunkLayoutTestshttptestspreloadresourcesdownload_resources_from_headerphp"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/resources/download_resources_from_header.php (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/resources/download_resources_from_header.php                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/resources/download_resources_from_header.php        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,26 @@
</span><ins>+&lt;?php
+header(&quot;Link: &lt;../resources/dummy.js&gt;; rel=preload; as=script&quot;, false);
+header(&quot;Link:&lt;../resources/dummy.css&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;../resources/square.png&gt;;rel=preload;as=image&quot;, false);
+header(&quot;Link: &lt;../resources/Ahem.ttf&gt;; rel=preload; as=font; crossorigin&quot;, false);
+header(&quot;Link: &lt;../resources/test.mp4&gt;; rel=preload; as=media&quot;, false);
+header(&quot;link: &lt;../security/resources/captions.vtt&gt;; rel=preload; as=track&quot;, false);
+header(&quot;Link: &lt;../resources/dummy.xml?badvalue&gt;; rel=preload; as=foobar&quot;, false);
+header(&quot;Link: &lt;../resources/dummy.xml&gt;; rel=preload&quot;, false);
+?&gt;
+&lt;!DOCTYPE html&gt;
+&lt;script src=&quot;/js-test-resources/js-test.js&quot;&gt;&lt;/script&gt;
+&lt;script&gt;
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/dummy.js');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/dummy.css');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/square.png');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/Ahem.ttf');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/test.mp4');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../security/resources/captions.vtt');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/dummy.xml?badvalue');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/dummy.xml');&quot;);
+&lt;/script&gt;
+&lt;script&gt;
+    if (window.internals)
+        window.internals.setLinkPreloadSupport(false);
+&lt;/script&gt;
</ins></span></pre></div>
<a id="trunkLayoutTestshttptestspreloadresourcesinvalid_resources_from_headerphp"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/http/tests/preload/resources/invalid_resources_from_header.php (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/http/tests/preload/resources/invalid_resources_from_header.php                                (rev 0)
+++ trunk/LayoutTests/http/tests/preload/resources/invalid_resources_from_header.php        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,46 @@
</span><ins>+&lt;?php
+header(&quot;Link: &lt;   ../resources/dummy.js &gt;; rel=preload; as=script&quot;, false);
+header(&quot;Link: &lt;../משאבים/dummy.css&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;../résôûrcès/dummy.css&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;../resources/Ahem{.ttf,.woff}&gt;; rel=preload; as=font; crossorigin&quot;, false);
+header(&quot;Link: &lt;../resources/test\f.mp4&gt;; rel=preload; as=media&quot;, false);
+header(&quot;Link: &lt;../security/resources/cap\ttions.vtt&gt;; rel=preload; as=track&quot;, false);
+header(&quot;Link: &lt;../resources/dummy   .xml&gt;; rel=preload;&quot;, false);
+header(&quot;Link: &lt;../resources/dumm&gt;y.xml&gt;; rel=preload&quot;, false);
+header(&quot;Content-Security-Policy: img-src 'none'&quot;, false);
+header(&quot;Link: &lt;http://localhost:8000/preload/resources/square.png&gt;; rel=preload; as=image&quot;, false);
+header(&quot;Link: &lt;http://localhost:53/preload/resources/dummy.js&gt;; rel=preload; as=script&quot;, false);
+header(&quot;Link: &lt;#foobar&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;   \t&gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &gt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: &lt;; rel=preload; as=style&quot;, false);
+header(&quot;Link: ; rel=preload; as=style&quot;, false);
+header(&quot;Link &lt;../resources/Ahem.ttf&gt;; rel=preload; as=font; crossorigin&quot;, false);
+header(&quot;Link: &lt;   ../resources/dummy.js?foobar &gt;; rel=preload; as='&quot;, false);
+?&gt;
+&lt;!DOCTYPE html&gt;
+&lt;script src=&quot;/js-test-resources/js-test.js&quot;&gt;&lt;/script&gt;
+&lt;script&gt;
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/dummy.js');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../משאבים/dummy.css');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../résôûrcès/square.png');&quot;);
+    // Invalid URLs get preloaded (and get terminated further down the stack)
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/Ahem{.ttf,.woff}');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/test.mp4');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/test\f.mp4');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../security/resources/cap\ttions.vtt');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/dummy.xml?badvalue');&quot;);
+    shouldBeTrue(&quot;internals.isPreloaded('../resources/dummy   .xml');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/dummy.xml');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/dumm');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('http://localhost:8000/preload/resources/square.png');&quot;);
+    // Invalid ports get preloaded (and get terminated further down the stack).
+    shouldBeTrue(&quot;internals.isPreloaded('http://localhost:53/preload/resources/dummy.js');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('#foobar');&quot;);
+    shouldBeFalse(&quot;internals.isPreloaded('../resources/Ahem.ttf');&quot;);
+&lt;/script&gt;
+&lt;script&gt;
+    if (window.internals)
+        window.internals.setLinkPreloadSupport(false);
+&lt;/script&gt;
</ins></span></pre></div>
<a id="trunkSourceWebCoreCMakeListstxt"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/CMakeLists.txt (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/CMakeLists.txt        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/CMakeLists.txt        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -1856,6 +1856,7 @@
</span><span class="cx">     loader/FrameLoaderStateMachine.cpp
</span><span class="cx">     loader/HistoryController.cpp
</span><span class="cx">     loader/ImageLoader.cpp
</span><ins>+    loader/LinkHeader.cpp
</ins><span class="cx">     loader/LinkLoader.cpp
</span><span class="cx">     loader/LinkPreloadResourceClients.cpp
</span><span class="cx">     loader/LoadTiming.cpp
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/ChangeLog        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -1,3 +1,57 @@
</span><ins>+2017-01-18  Yoav Weiss  &lt;yoav@yoav.ws&gt;
+
+        Add Link header support for preload.
+        https://bugs.webkit.org/show_bug.cgi?id=165521
+
+        Reviewed by Alex Christensen.
+
+        This patch adds Link header support for preload, by adding a Link
+        header parser, and calling it from FrameLoader::receivedFirstData.
+
+        Test: http/tests/preload/download_resources_from_header.php
+
+        * CMakeLists.txt: Add LinkHeader files.
+        * WebCore.xcodeproj/project.pbxproj: Add LinkHeader files.
+        * loader/FrameLoader.cpp:
+        (WebCore::receivedFirstData): Trigger Link based preloading by calling loadLinksFromHeader.
+        * loader/LinkHeader.cpp: Added.
+        (WebCore::isWhitespace):
+        (WebCore::isValidURLChar):
+        (WebCore::isValidParameterNameChar):
+        (WebCore::isValidParameterValueEnd):
+        (WebCore::isValidParameterValueChar):
+        (WebCore::isExtensionParameter):
+        (WebCore::parseURL):
+        (WebCore::invalidParameterDelimiter):
+        (WebCore::validFieldEnd):
+        (WebCore::parseParameterDelimiter):
+        (WebCore::paramterNameFromString):
+        (WebCore::parseParameterName):
+        (WebCore::skipQuotesIfNeeded):
+        (WebCore::parseParameterValue):
+        (WebCore::LinkHeader::setValue):
+        (WebCore::findNextHeader):
+        (WebCore::LinkHeader::LinkHeader):
+        (WebCore::LinkHeaderSet::LinkHeaderSet):
+        (WebCore::LinkHeaderSet::init):
+        * loader/LinkHeader.h: Added.
+        (WebCore::LinkHeader::url):
+        (WebCore::LinkHeader::rel):
+        (WebCore::LinkHeader::as):
+        (WebCore::LinkHeader::mimeType):
+        (WebCore::LinkHeader::media):
+        (WebCore::LinkHeader::crossOrigin):
+        (WebCore::LinkHeader::valid):
+        (WebCore::LinkHeaderSet::begin):
+        (WebCore::LinkHeaderSet::end):
+        (WebCore::LinkHeaderSet::operator[]):
+        (WebCore::LinkHeaderSet::size):
+        * loader/LinkLoader.cpp:
+        (WebCore::LinkLoader::loadLinksFromHeader): Loads link preload directives that arrive from Link headers.
+        (WebCore::LinkLoader::preloadIfNeeded): Add return value.
+        * loader/LinkLoader.h:
+        * platform/network/HTTPHeaderNames.in: Add &quot;Link&quot; as a header name.
+
</ins><span class="cx"> 2017-01-18  Filip Pizlo  &lt;fpizlo@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         JSSegmentedVariableObject and its subclasses should have a sane destruction story
</span></span></pre></div>
<a id="trunkSourceWebCoreWebCorexcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -5708,6 +5708,8 @@
</span><span class="cx">                 CB38FD5B1CD2325B00592A3F /* JSPerformanceResourceTiming.h in Headers */ = {isa = PBXBuildFile; fileRef = CB38FD591CD2314500592A3F /* JSPerformanceResourceTiming.h */; };
</span><span class="cx">                 CB61C7931D755207001ADC7D /* LinkPreloadResourceClients.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CBB6B2D11CB7ADC6009EDE1A /* LinkPreloadResourceClients.cpp */; };
</span><span class="cx">                 CB8CF0181A9358D4000D510B /* Microtasks.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CB8CF0151A934B43000D510B /* Microtasks.cpp */; };
</span><ins>+                CBA9DC0A1DF44DF10005675C /* LinkHeader.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CBA9DC081DF44DC40005675C /* LinkHeader.cpp */; };
+                CBA9DC0B1DF44DF40005675C /* LinkHeader.h in Headers */ = {isa = PBXBuildFile; fileRef = CBA9DC091DF44DC40005675C /* LinkHeader.h */; settings = {ATTRIBUTES = (Private, ); }; };
</ins><span class="cx">                 CBB6B2D41CB7AE51009EDE1A /* LinkPreloadResourceClients.h in Headers */ = {isa = PBXBuildFile; fileRef = CBB6B2D21CB7ADD0009EDE1A /* LinkPreloadResourceClients.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="cx">                 CBC2D22F1CE5B89D00D1880B /* ResourceTimingInformation.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CBC2D22D1CE5B77400D1880B /* ResourceTimingInformation.cpp */; };
</span><span class="cx">                 CBC2D2301CE5B8A100D1880B /* ResourceTimingInformation.h in Headers */ = {isa = PBXBuildFile; fileRef = CBC2D22E1CE5B77D00D1880B /* ResourceTimingInformation.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="lines">@@ -13637,6 +13639,8 @@
</span><span class="cx">                 CB38FD581CD2314500592A3F /* JSPerformanceResourceTiming.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSPerformanceResourceTiming.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 CB38FD591CD2314500592A3F /* JSPerformanceResourceTiming.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSPerformanceResourceTiming.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 CB8CF0151A934B43000D510B /* Microtasks.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Microtasks.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><ins>+                CBA9DC081DF44DC40005675C /* LinkHeader.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = LinkHeader.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
+                CBA9DC091DF44DC40005675C /* LinkHeader.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = LinkHeader.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</ins><span class="cx">                 CBB6B2D11CB7ADC6009EDE1A /* LinkPreloadResourceClients.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = LinkPreloadResourceClients.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 CBB6B2D21CB7ADD0009EDE1A /* LinkPreloadResourceClients.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = LinkPreloadResourceClients.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 CBC2D22D1CE5B77400D1880B /* ResourceTimingInformation.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ResourceTimingInformation.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="lines">@@ -22332,6 +22336,8 @@
</span><span class="cx">                 BCB16BFB0979C38700467741 /* loader */ = {
</span><span class="cx">                         isa = PBXGroup;
</span><span class="cx">                         children = (
</span><ins>+                                CBA9DC081DF44DC40005675C /* LinkHeader.cpp */,
+                                CBA9DC091DF44DC40005675C /* LinkHeader.h */,
</ins><span class="cx">                                 1A8F6BB00DB55CDC001DB794 /* appcache */,
</span><span class="cx">                                 512DD8E80D91E691000F89EE /* archive */,
</span><span class="cx">                                 A8D2B2521287A56000AF4DDA /* cache */,
</span><span class="lines">@@ -25814,6 +25820,7 @@
</span><span class="cx">                                 A8EA7CAF0A192B9C00A8EF5F /* HTMLHRElement.h in Headers */,
</span><span class="cx">                                 A871DE270A152AC800B12A68 /* HTMLHtmlElement.h in Headers */,
</span><span class="cx">                                 A871DE2A0A152AC800B12A68 /* HTMLIFrameElement.h in Headers */,
</span><ins>+                                CBA9DC0B1DF44DF40005675C /* LinkHeader.h in Headers */,
</ins><span class="cx">                                 A8EA7D2D0A19385500A8EF5F /* HTMLImageElement.h in Headers */,
</span><span class="cx">                                 A8EA7D2B0A19385500A8EF5F /* HTMLImageLoader.h in Headers */,
</span><span class="cx">                                 A81369CC097374F600D74463 /* HTMLInputElement.h in Headers */,
</span><span class="lines">@@ -30589,6 +30596,7 @@
</span><span class="cx">                                 1402645E0AFDC19B005919E2 /* LoggingMac.mm in Sources */,
</span><span class="cx">                                 1A0409F31A43675C009E47F3 /* MachSendRight.cpp in Sources */,
</span><span class="cx">                                 932AD70517EFA2C30038F8FF /* MainFrame.cpp in Sources */,
</span><ins>+                                CBA9DC0A1DF44DF10005675C /* LinkHeader.cpp in Sources */,
</ins><span class="cx">                                 7AE6C93B1BE0C60100E19E03 /* MainThreadSharedTimer.cpp in Sources */,
</span><span class="cx">                                 7AE6C9381BE0C5C800E19E03 /* MainThreadSharedTimerCF.cpp in Sources */,
</span><span class="cx">                                 1A8F6BC50DB55CDC001DB794 /* ManifestParser.cpp in Sources */,
</span></span></pre></div>
<a id="trunkSourceWebCoreloaderFrameLoadercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/FrameLoader.cpp (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/FrameLoader.cpp        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/loader/FrameLoader.cpp        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -79,6 +79,7 @@
</span><span class="cx"> #include &quot;IgnoreOpensDuringUnloadCountIncrementer.h&quot;
</span><span class="cx"> #include &quot;InspectorController.h&quot;
</span><span class="cx"> #include &quot;InspectorInstrumentation.h&quot;
</span><ins>+#include &quot;LinkLoader.h&quot;
</ins><span class="cx"> #include &quot;LoadTiming.h&quot;
</span><span class="cx"> #include &quot;LoaderStrategy.h&quot;
</span><span class="cx"> #include &quot;Logging.h&quot;
</span><span class="lines">@@ -659,6 +660,9 @@
</span><span class="cx">     ASSERT(m_frame.document());
</span><span class="cx">     auto&amp; document = *m_frame.document();
</span><span class="cx"> 
</span><ins>+    ASSERT(m_frame.document());
+    LinkLoader::loadLinksFromHeader(m_documentLoader-&gt;response().httpHeaderField(HTTPHeaderName::Link), m_frame.document()-&gt;url(), *m_frame.document());
+
</ins><span class="cx">     double delay;
</span><span class="cx">     String urlString;
</span><span class="cx">     if (!parseHTTPRefresh(m_documentLoader-&gt;response().httpHeaderField(HTTPHeaderName::Refresh), delay, urlString))
</span></span></pre></div>
<a id="trunkSourceWebCoreloaderLinkHeadercpp"></a>
<div class="addfile"><h4>Added: trunk/Source/WebCore/loader/LinkHeader.cpp (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/LinkHeader.cpp                                (rev 0)
+++ trunk/Source/WebCore/loader/LinkHeader.cpp        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,365 @@
</span><ins>+/*
+ * Copyright 2015 The Chromium Authors. All rights reserved.
+ * Copyright (C) 2016 Akamai Technologies Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include &quot;config.h&quot;
+#include &quot;LinkHeader.h&quot;
+
+#include &quot;ParsingUtilities.h&quot;
+
+namespace WebCore {
+
+// LWSP definition in https://www.ietf.org/rfc/rfc0822.txt
+template &lt;typename CharacterType&gt;
+static bool isSpaceOrTab(CharacterType chr)
+{
+    return (chr == ' ') || (chr == '\t');
+}
+
+template &lt;typename CharacterType&gt;
+static bool isNotURLTerminatingChar(CharacterType chr)
+{
+    return (chr != '&gt;');
+}
+
+template &lt;typename CharacterType&gt;
+static bool isValidParameterNameChar(CharacterType chr)
+{
+    // A separator, CTL or '%', '*' or '\'' means the char is not valid.
+    // Definition as attr-char at https://tools.ietf.org/html/rfc5987
+    // CTL and separators are defined in https://tools.ietf.org/html/rfc2616#section-2.2
+    // Valid chars are alpha-numeric and any of !#$&amp;+-.^_`|~&quot;
+    if ((chr &gt;= '^' &amp;&amp; chr &lt;= 'z') || (chr &gt;= 'A' &amp;&amp; chr &lt;= 'Z') || (chr &gt;= '0' &amp;&amp; chr &lt;= '9') || (chr &gt;= '!' &amp;&amp; chr &lt;= '$') || chr == '&amp;' || chr == '+' || chr == '-' || chr == '.')
+        return true;
+    return false;
+}
+
+template &lt;typename CharacterType&gt;
+static bool isParameterValueEnd(CharacterType chr)
+{
+    return chr == ';' || chr == ',';
+}
+
+template &lt;typename CharacterType&gt;
+static bool isParameterValueChar(CharacterType chr)
+{
+    return !isSpaceOrTab(chr) &amp;&amp; !isParameterValueEnd(chr);
+}
+
+// Verify that the parameter is a link-extension which according to spec doesn't have to have a value.
+static bool isExtensionParameter(LinkHeader::LinkParameterName name)
+{
+    return name &gt;= LinkHeader::LinkParameterUnknown;
+}
+
+// Before:
+//
+// &lt;cat.jpg&gt;; rel=preload
+// ^                     ^
+// position              end
+//
+// After (if successful: otherwise the method returns false)
+//
+// &lt;cat.jpg&gt;; rel=preload
+//          ^            ^
+//          position     end
+template &lt;typename CharacterType&gt;
+static std::optional&lt;String&gt; findURLBoundaries(CharacterType*&amp; position, CharacterType* const end)
+{
+    ASSERT(position &lt;= end);
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    if (!skipExactly&lt;CharacterType&gt;(position, end, '&lt;'))
+        return std::nullopt;
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+
+    CharacterType* urlStart = position;
+    skipWhile&lt;CharacterType, isNotURLTerminatingChar&gt;(position, end);
+    CharacterType* urlEnd = position;
+    skipUntil&lt;CharacterType&gt;(position, end, '&gt;');
+    if (!skipExactly&lt;CharacterType&gt;(position, end, '&gt;'))
+        return std::nullopt;
+
+    return String(urlStart, urlEnd - urlStart);
+}
+
+template &lt;typename CharacterType&gt;
+static bool invalidParameterDelimiter(CharacterType*&amp; position, CharacterType* const end)
+{
+    ASSERT(position &lt;= end);
+    return (!skipExactly&lt;CharacterType&gt;(position, end, ';') &amp;&amp; (position &lt; end) &amp;&amp; (*position != ','));
+}
+
+template &lt;typename CharacterType&gt;
+static bool validFieldEnd(CharacterType*&amp; position, CharacterType* const end)
+{
+    ASSERT(position &lt;= end);
+    return (position == end || *position == ',');
+}
+
+// Before:
+//
+// &lt;cat.jpg&gt;; rel=preload
+//          ^            ^
+//          position     end
+//
+// After (if successful: otherwise the method returns false, and modifies the isValid boolean accordingly)
+//
+// &lt;cat.jpg&gt;; rel=preload
+//            ^          ^
+//            position  end
+template &lt;typename CharacterType&gt;
+static bool parseParameterDelimiter(CharacterType*&amp; position, CharacterType* const end, bool&amp; isValid)
+{
+    ASSERT(position &lt;= end);
+    isValid = true;
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    if (invalidParameterDelimiter(position, end)) {
+        isValid = false;
+        return false;
+    }
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    if (validFieldEnd(position, end))
+        return false;
+    return true;
+}
+
+static LinkHeader::LinkParameterName paramterNameFromString(String name)
+{
+    if (equalLettersIgnoringASCIICase(name, &quot;rel&quot;))
+        return LinkHeader::LinkParameterRel;
+    if (equalLettersIgnoringASCIICase(name, &quot;anchor&quot;))
+        return LinkHeader::LinkParameterAnchor;
+    if (equalLettersIgnoringASCIICase(name, &quot;crossorigin&quot;))
+        return LinkHeader::LinkParameterCrossOrigin;
+    if (equalLettersIgnoringASCIICase(name, &quot;title&quot;))
+        return LinkHeader::LinkParameterTitle;
+    if (equalLettersIgnoringASCIICase(name, &quot;media&quot;))
+        return LinkHeader::LinkParameterMedia;
+    if (equalLettersIgnoringASCIICase(name, &quot;type&quot;))
+        return LinkHeader::LinkParameterType;
+    if (equalLettersIgnoringASCIICase(name, &quot;rev&quot;))
+        return LinkHeader::LinkParameterRev;
+    if (equalLettersIgnoringASCIICase(name, &quot;hreflang&quot;))
+        return LinkHeader::LinkParameterHreflang;
+    if (equalLettersIgnoringASCIICase(name, &quot;as&quot;))
+        return LinkHeader::LinkParameterAs;
+    return LinkHeader::LinkParameterUnknown;
+}
+
+// Before:
+//
+// &lt;cat.jpg&gt;; rel=preload
+//            ^          ^
+//            position   end
+//
+// After (if successful: otherwise the method returns false)
+//
+// &lt;cat.jpg&gt;; rel=preload
+//                ^      ^
+//            position  end
+template &lt;typename CharacterType&gt;
+static bool parseParameterName(CharacterType*&amp; position, CharacterType* const end, LinkHeader::LinkParameterName&amp; name)
+{
+    ASSERT(position &lt;= end);
+    CharacterType* nameStart = position;
+    skipWhile&lt;CharacterType, isValidParameterNameChar&gt;(position, end);
+    CharacterType* nameEnd = position;
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    bool hasEqual = skipExactly&lt;CharacterType&gt;(position, end, '=');
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    name = paramterNameFromString(String(nameStart, nameEnd - nameStart));
+    if (hasEqual)
+        return true;
+    bool validParameterValueEnd = (position == end) || isParameterValueEnd(*position);
+    return validParameterValueEnd &amp;&amp; isExtensionParameter(name);
+}
+
+// Before:
+//
+// &lt;cat.jpg&gt;; rel=&quot;preload&quot;; type=&quot;image/jpeg&quot;;
+//                ^                            ^
+//            position                        end
+//
+// After (if the parameter starts with a quote, otherwise the method returns false)
+//
+// &lt;cat.jpg&gt;; rel=&quot;preload&quot;; type=&quot;image/jpeg&quot;;
+//                         ^                   ^
+//                     position               end
+template &lt;typename CharacterType&gt;
+static bool skipQuotesIfNeeded(CharacterType*&amp; position, CharacterType* const end, bool&amp; completeQuotes)
+{
+    ASSERT(position &lt;= end);
+    unsigned char quote;
+    if (skipExactly&lt;CharacterType&gt;(position, end, '\''))
+        quote = '\'';
+    else if (skipExactly&lt;CharacterType&gt;(position, end, '&quot;'))
+        quote = '&quot;';
+    else
+        return false;
+
+    while (!completeQuotes &amp;&amp; position &lt; end) {
+        skipUntil(position, end, static_cast&lt;CharacterType&gt;(quote));
+        if (*(position - 1) != '\\')
+            completeQuotes = true;
+        completeQuotes = skipExactly(position, end, static_cast&lt;CharacterType&gt;(quote)) &amp;&amp; completeQuotes;
+    }
+    return true;
+}
+
+// Before:
+//
+// &lt;cat.jpg&gt;; rel=preload; foo=bar
+//                ^               ^
+//            position            end
+//
+// After (if successful: otherwise the method returns false)
+//
+// &lt;cat.jpg&gt;; rel=preload; foo=bar
+//                       ^        ^
+//                   position     end
+template &lt;typename CharacterType&gt;
+static bool parseParameterValue(CharacterType*&amp; position, CharacterType* const end, String&amp; value)
+{
+    ASSERT(position &lt;= end);
+    CharacterType* valueStart = position;
+    CharacterType* valueEnd = position;
+    bool completeQuotes = false;
+    bool hasQuotes = skipQuotesIfNeeded(position, end, completeQuotes);
+    if (!hasQuotes)
+        skipWhile&lt;CharacterType, isParameterValueChar&gt;(position, end);
+    valueEnd = position;
+    skipWhile&lt;CharacterType, isSpaceOrTab&gt;(position, end);
+    if ((!completeQuotes &amp;&amp; valueStart == valueEnd) || (position != end &amp;&amp; !isParameterValueEnd(*position))) {
+        value = String(&quot;&quot;);
+        return false;
+    }
+    if (hasQuotes)
+        ++valueStart;
+    if (completeQuotes)
+        --valueEnd;
+    ASSERT(valueEnd &gt;= valueStart);
+    value = String(valueStart, valueEnd - valueStart);
+    return !hasQuotes || completeQuotes;
+}
+
+void LinkHeader::setValue(LinkParameterName name, String value)
+{
+    switch (name) {
+    case LinkParameterRel:
+        if (!m_rel)
+            m_rel = value;
+        break;
+    case LinkParameterAnchor:
+        m_isValid = false;
+        break;
+    case LinkParameterCrossOrigin:
+        m_crossOrigin = value;
+        break;
+    case LinkParameterAs:
+        m_as = value;
+        break;
+    case LinkParameterType:
+        m_mimeType = value;
+        break;
+    case LinkParameterMedia:
+        m_media = value;
+        break;
+    case LinkParameterTitle:
+    case LinkParameterRev:
+    case LinkParameterHreflang:
+    case LinkParameterUnknown:
+        // These parameters are not yet supported, so they are currently ignored.
+        break;
+    }
+    // FIXME: Add support for more header parameters as neccessary.
+}
+
+template &lt;typename CharacterType&gt;
+static void findNextHeader(CharacterType*&amp; position, CharacterType* const end)
+{
+    ASSERT(position &lt;= end);
+    skipUntil&lt;CharacterType&gt;(position, end, ',');
+    skipExactly&lt;CharacterType&gt;(position, end, ',');
+}
+
+template &lt;typename CharacterType&gt;
+LinkHeader::LinkHeader(CharacterType*&amp; position, CharacterType* const end)
+{
+    ASSERT(position &lt;= end);
+    auto urlResult = findURLBoundaries(position, end);
+    if (urlResult == std::nullopt) {
+        m_isValid = false;
+        findNextHeader(position, end);
+        return;
+    }
+    m_url = urlResult.value();
+
+    while (m_isValid &amp;&amp; position &lt; end) {
+        if (!parseParameterDelimiter(position, end, m_isValid)) {
+            findNextHeader(position, end);
+            return;
+        }
+
+        LinkParameterName parameterName;
+        if (!parseParameterName(position, end, parameterName)) {
+            findNextHeader(position, end);
+            m_isValid = false;
+            return;
+        }
+
+        String parameterValue;
+        if (!parseParameterValue(position, end, parameterValue) &amp;&amp; !isExtensionParameter(parameterName)) {
+            findNextHeader(position, end);
+            m_isValid = false;
+            return;
+        }
+
+        setValue(parameterName, parameterValue);
+    }
+    findNextHeader(position, end);
+}
+
+LinkHeaderSet::LinkHeaderSet(const String&amp; header)
+{
+    if (header.isNull())
+        return;
+
+    if (header.is8Bit())
+        init(header.characters8(), header.length());
+    else
+        init(header.characters16(), header.length());
+}
+
+template &lt;typename CharacterType&gt;
+void LinkHeaderSet::init(CharacterType* headerValue, size_t length)
+{
+    CharacterType* position = headerValue;
+    CharacterType* const end = headerValue + length;
+    while (position &lt; end)
+        m_headerSet.append(LinkHeader(position, end));
+}
+
+} // namespace WebCore
+
</ins></span></pre></div>
<a id="trunkSourceWebCoreloaderLinkHeaderh"></a>
<div class="addfile"><h4>Added: trunk/Source/WebCore/loader/LinkHeader.h (0 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/LinkHeader.h                                (rev 0)
+++ trunk/Source/WebCore/loader/LinkHeader.h        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -0,0 +1,87 @@
</span><ins>+/*
+ * Copyright 2015 The Chromium Authors. All rights reserved.
+ * Copyright (C) 2016 Akamai Technologies Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include &lt;wtf/text/WTFString.h&gt;
+
+namespace WebCore {
+
+class LinkHeader {
+public:
+    template &lt;typename CharacterType&gt;
+    LinkHeader(CharacterType*&amp; position, CharacterType* const end);
+
+    const String&amp; url() const { return m_url; }
+    const String&amp; rel() const { return m_rel; }
+    const String&amp; as() const { return m_as; }
+    const String&amp; mimeType() const { return m_mimeType; }
+    const String&amp; media() const { return m_media; }
+    const String&amp; crossOrigin() const { return m_crossOrigin; }
+    bool valid() const { return m_isValid; }
+
+    enum LinkParameterName {
+        LinkParameterRel,
+        LinkParameterAnchor,
+        LinkParameterTitle,
+        LinkParameterMedia,
+        LinkParameterType,
+        LinkParameterRev,
+        LinkParameterHreflang,
+        // Beyond this point, only link-extension parameters
+        LinkParameterUnknown,
+        LinkParameterCrossOrigin,
+        LinkParameterAs,
+    };
+
+private:
+    void setValue(LinkParameterName, String value);
+
+    String m_url;
+    String m_rel;
+    String m_as;
+    String m_mimeType;
+    String m_media;
+    String m_crossOrigin;
+    bool m_isValid { true };
+};
+
+class LinkHeaderSet {
+public:
+    LinkHeaderSet(const String&amp; header);
+
+    Vector&lt;LinkHeader&gt;::const_iterator begin() const { return m_headerSet.begin(); }
+    Vector&lt;LinkHeader&gt;::const_iterator end() const { return m_headerSet.end(); }
+
+private:
+    template &lt;typename CharacterType&gt;
+    void init(CharacterType* headerValue, size_t length);
+
+    Vector&lt;LinkHeader&gt; m_headerSet;
+};
+
+} // namespace WebCore
+
</ins></span></pre></div>
<a id="trunkSourceWebCoreloaderLinkLoadercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/LinkLoader.cpp (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/LinkLoader.cpp        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/loader/LinkLoader.cpp        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -43,6 +43,7 @@
</span><span class="cx"> #include &quot;Frame.h&quot;
</span><span class="cx"> #include &quot;FrameLoaderClient.h&quot;
</span><span class="cx"> #include &quot;FrameView.h&quot;
</span><ins>+#include &quot;LinkHeader.h&quot;
</ins><span class="cx"> #include &quot;LinkPreloadResourceClients.h&quot;
</span><span class="cx"> #include &quot;LinkRelAttribute.h&quot;
</span><span class="cx"> #include &quot;RuntimeEnabledFeatures.h&quot;
</span><span class="lines">@@ -83,6 +84,24 @@
</span><span class="cx">     m_cachedLinkResource = nullptr;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+void LinkLoader::loadLinksFromHeader(const String&amp; headerValue, const URL&amp; baseURL, Document&amp; document)
+{
+    if (headerValue.isEmpty())
+        return;
+    LinkHeaderSet headerSet(headerValue);
+    for (auto&amp; header : headerSet) {
+        if (!header.valid() || header.url().isEmpty() || header.rel().isEmpty())
+            continue;
+
+        LinkRelAttribute relAttribute(header.rel());
+        URL url(baseURL, header.url());
+        // Sanity check to avoid re-entrancy here.
+        if (equalIgnoringFragmentIdentifier(url, baseURL))
+            continue;
+        preloadIfNeeded(relAttribute, url, document, header.as(), header.crossOrigin(), nullptr, nullptr);
+    }
+}
+
</ins><span class="cx"> std::optional&lt;CachedResource::Type&gt; LinkLoader::resourceTypeFromAsAttribute(const String&amp; as)
</span><span class="cx"> {
</span><span class="cx">     if (as.isEmpty())
</span><span class="lines">@@ -139,21 +158,22 @@
</span><span class="cx">     return nullptr;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void LinkLoader::preloadIfNeeded(const LinkRelAttribute&amp; relAttribute, const URL&amp; href, Document&amp; document, const String&amp; as, const String&amp; crossOriginMode)
</del><ins>+std::unique_ptr&lt;LinkPreloadResourceClient&gt; LinkLoader::preloadIfNeeded(const LinkRelAttribute&amp; relAttribute, const URL&amp; href, Document&amp; document, const String&amp; as, const String&amp; crossOriginMode, LinkLoader* loader, LinkLoaderClient* client)
</ins><span class="cx"> {
</span><span class="cx">     if (!document.loader() || !relAttribute.isLinkPreload)
</span><del>-        return;
</del><ins>+        return nullptr;
</ins><span class="cx"> 
</span><span class="cx">     ASSERT(RuntimeEnabledFeatures::sharedFeatures().linkPreloadEnabled());
</span><span class="cx">     if (!href.isValid()) {
</span><span class="cx">         document.addConsoleMessage(MessageSource::Other, MessageLevel::Error, String(&quot;&lt;link rel=preload&gt; has an invalid `href` value&quot;));
</span><del>-        return;
</del><ins>+        return nullptr;
</ins><span class="cx">     }
</span><span class="cx">     auto type = LinkLoader::resourceTypeFromAsAttribute(as);
</span><span class="cx">     if (!type) {
</span><span class="cx">         document.addConsoleMessage(MessageSource::Other, MessageLevel::Error, String(&quot;&lt;link rel=preload&gt; must have a valid `as` value&quot;));
</span><del>-        m_client.linkLoadingErrored();
-        return;
</del><ins>+        if (client)
+            client-&gt;linkLoadingErrored();
+        return nullptr;
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     ResourceRequest resourceRequest(document.completeURL(href));
</span><span class="lines">@@ -164,8 +184,9 @@
</span><span class="cx">     linkRequest.setAsPotentiallyCrossOrigin(crossOriginMode, document);
</span><span class="cx">     CachedResourceHandle&lt;CachedResource&gt; cachedLinkResource = document.cachedResourceLoader().preload(type.value(), WTFMove(linkRequest));
</span><span class="cx"> 
</span><del>-    if (cachedLinkResource)
-        m_preloadResourceClient = createLinkPreloadResourceClient(*cachedLinkResource, *this, type.value());
</del><ins>+    if (cachedLinkResource &amp;&amp; loader)
+        return createLinkPreloadResourceClient(*cachedLinkResource, *loader, type.value());
+    return nullptr;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> bool LinkLoader::loadLink(const LinkRelAttribute&amp; relAttribute, const URL&amp; href, const String&amp; as, const String&amp; crossOrigin, Document&amp; document)
</span><span class="lines">@@ -178,8 +199,11 @@
</span><span class="cx">             document.frame()-&gt;loader().client().prefetchDNS(href.host());
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    if (m_client.shouldLoadLink())
-        preloadIfNeeded(relAttribute, href, document, as, crossOrigin);
</del><ins>+    if (m_client.shouldLoadLink()) {
+        auto resourceClient = preloadIfNeeded(relAttribute, href, document, as, crossOrigin, this, &amp;m_client);
+        if (resourceClient)
+            m_preloadResourceClient = WTFMove(resourceClient);
+    }
</ins><span class="cx"> 
</span><span class="cx"> #if ENABLE(LINK_PREFETCH)
</span><span class="cx">     if ((relAttribute.isLinkPrefetch || relAttribute.isLinkSubresource) &amp;&amp; href.isValid() &amp;&amp; document.frame()) {
</span></span></pre></div>
<a id="trunkSourceWebCoreloaderLinkLoaderh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/loader/LinkLoader.h (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/loader/LinkLoader.h        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/loader/LinkLoader.h        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -53,6 +53,7 @@
</span><span class="cx"> 
</span><span class="cx">     bool loadLink(const LinkRelAttribute&amp;, const URL&amp;, const String&amp; as, const String&amp; crossOrigin, Document&amp;);
</span><span class="cx">     static std::optional&lt;CachedResource::Type&gt; resourceTypeFromAsAttribute(const String&amp; as);
</span><ins>+    static void loadLinksFromHeader(const String&amp; headerValue, const URL&amp; baseURL, Document&amp;);
</ins><span class="cx"> 
</span><span class="cx">     WeakPtr&lt;LinkLoader&gt; createWeakPtr() { return m_weakPtrFactory.createWeakPtr(); }
</span><span class="cx">     void triggerEvents(const CachedResource&amp;);
</span><span class="lines">@@ -59,7 +60,7 @@
</span><span class="cx"> 
</span><span class="cx"> private:
</span><span class="cx">     void notifyFinished(CachedResource&amp;) override;
</span><del>-    void preloadIfNeeded(const LinkRelAttribute&amp;, const URL&amp; href, Document&amp;, const String&amp; as, const String&amp; crossOriginMode);
</del><ins>+    static std::unique_ptr&lt;LinkPreloadResourceClient&gt; preloadIfNeeded(const LinkRelAttribute&amp;, const URL&amp; href, Document&amp;, const String&amp; as, const String&amp; crossOriginMode, LinkLoader*, LinkLoaderClient*);
</ins><span class="cx"> 
</span><span class="cx">     LinkLoaderClient&amp; m_client;
</span><span class="cx">     CachedResourceHandle&lt;CachedResource&gt; m_cachedLinkResource;
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformnetworkHTTPHeaderNamesin"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/network/HTTPHeaderNames.in (210913 => 210914)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/network/HTTPHeaderNames.in        2017-01-19 05:26:49 UTC (rev 210913)
+++ trunk/Source/WebCore/platform/network/HTTPHeaderNames.in        2017-01-19 07:13:54 UTC (rev 210914)
</span><span class="lines">@@ -68,6 +68,7 @@
</span><span class="cx"> Last-Event-ID
</span><span class="cx"> Last-Modified
</span><span class="cx"> Location
</span><ins>+Link
</ins><span class="cx"> Origin
</span><span class="cx"> Ping-From
</span><span class="cx"> Ping-To
</span></span></pre>
</div>
</div>

</body>
</html>