Seculative resource prefetching for URLs CL.

chrome/browser/net/resource_prefetch_interceptor.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/net/resource_prefetch_interceptor.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "net/url_request/url_request.h"
+
+using predictors::ResourcePrefetchPredictor;
+
+namespace chrome_browser_net {
+
+ResourcePrefetchInterceptor::ResourcePrefetchInterceptor(
+    scoped_refptr<ResourcePrefetchPredictor> predictor)
+        : predictor_(predictor) {
+  CHECK(predictor_.get());
+}
+
+ResourcePrefetchInterceptor::~ResourcePrefetchInterceptor() {
+}
+
+void ResourcePrefetchInterceptor::Intercept(
+    net::URLRequest* request,
+    bool is_response,
+    void(ResourcePrefetchPredictor::*interceptFunction)(
+        const ResourcePrefetchPredictor::URLRequestSummary&)) const {
+  ResourcePrefetchPredictor::URLRequestSummary summary;
+  if (!summary.InitFromURLRequest(request, is_response))
+    return;
+
+  CHECK(predictor_.get());
+  content::BrowserThread::PostTask(
+      content::BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(interceptFunction, predictor_, summary));
+}
+
+net::URLRequestJob* ResourcePrefetchInterceptor::MaybeIntercept(
+    net::URLRequest* request) const {
+  if (ResourcePrefetchPredictor::ShouldInterceptRequest(request))
+    Intercept(request, false, &ResourcePrefetchPredictor::RecordURLRequest);
+
+  return NULL;
+}
+
+net::URLRequestJob* ResourcePrefetchInterceptor::MaybeInterceptResponse(
+    net::URLRequest* request) const {
+  if (ResourcePrefetchPredictor::ShouldInterceptResponse(request))
+    Intercept(request, true, &ResourcePrefetchPredictor::RecordUrlResponse);
+
+  return NULL;
+}
+
+net::URLRequestJob* ResourcePrefetchInterceptor::MaybeInterceptRedirect(
+    const GURL& location, net::URLRequest* request) const {
+  if (ResourcePrefetchPredictor::ShouldInterceptRedirect(request))
+    Intercept(request, false, &ResourcePrefetchPredictor::RecordUrlRedirect);
+
+  return NULL;
+}
+
+}  // namespace chrome_browser_net