Bug 453403. Add DNS prefetching, similar to what Google chrome does. r+sr=bzbarsky, a=beltzner (2a5b7140) · Commits · clairehurst / Tor Browser

content/base/src/nsContentSink.cpp

+23 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,8 @@
		#include "nsIDocumentLoader.h"
		#include "nsICachingChannel.h"
		#include "nsICacheEntryDescriptor.h"
		#include "nsGenericHTMLElement.h"
		#include "nsHTMLDNSPrefetch.h"

		PRLogModuleInfo* gContentSinkLogModuleInfo;

		@@ -722,6 +724,10 @@ nsContentSink::ProcessLink(nsIContent* aElement,
		PrefetchHref(aHref, aElement, hasPrefetch);
		}

		if ((!aHref.IsEmpty()) && linkTypes.IndexOf(NS_LITERAL_STRING("dns-prefetch")) != -1) {
		PrefetchDNS(aHref);
		}

		// is it a stylesheet link?
		if (linkTypes.IndexOf(NS_LITERAL_STRING("stylesheet")) == -1) {
		return NS_OK;
		@@ -853,6 +859,23 @@ nsContentSink::PrefetchHref(const nsAString &aHref,
		}
		}

		void
		nsContentSink::PrefetchDNS(const nsAString &aHref)
		{
		nsAutoString hostname;

		if (StringBeginsWith(aHref, NS_LITERAL_STRING("//"))) {
		hostname = Substring(aHref, 2);
		}
		else
		nsGenericHTMLElement::GetHostnameFromHrefString(aHref, hostname);

		nsRefPtr<nsHTMLDNSPrefetch> prefetch = new nsHTMLDNSPrefetch(hostname, mDocument);
		if (prefetch) {
		prefetch->PrefetchLow();
		}
		}

		nsresult
		nsContentSink::GetChannelCacheKey(nsIChannel* aChannel, nsACString& aCacheKey)
		{

+4 −0

Original line number	Diff line number	Diff line
		@@ -195,6 +195,10 @@ protected:
		void PrefetchHref(const nsAString &aHref, nsIContent *aSource,
		PRBool aExplicit);

		// aHref can either be the usual URI format or of the form "//www.hostname.com"
		// without a scheme.
		void PrefetchDNS(const nsAString &aHref);

		// Gets the cache key (used to identify items in a cache) of the channel.
		nsresult GetChannelCacheKey(nsIChannel* aChannel, nsACString& aCacheKey);

+1 −0

Original line number	Diff line number	Diff line
		@@ -6572,6 +6572,7 @@ nsDocument::RetrieveRelevantHeaders(nsIChannel *aChannel)
		"content-language",
		"content-disposition",
		"refresh",
		"x-dns-prefetch-control",
		// add more http headers if you need
		// XXXbz don't add content-location support without reading bug
		// 238654 and its dependencies/dups first.

+1 −0

Original line number	Diff line number	Diff line
		@@ -987,6 +987,7 @@ GK_ATOM(headerWindowTarget, "window-target")
		GK_ATOM(withParam, "with-param")
		GK_ATOM(wizard, "wizard")
		GK_ATOM(wrap, "wrap")
		GK_ATOM(headerDNSPrefetchControl,"x-dns-prefetch-control")
		GK_ATOM(xml, "xml")
		GK_ATOM(xmlns, "xmlns")
		GK_ATOM(xmp, "xmp")

+1 −0