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// Copyright 2014 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_predictor_observer.h"
#include <string>
#include "base/metrics/histogram.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/resource_request_info.h"
#include "net/url_request/url_request.h"
#include "url/gurl.h"
using content::BrowserThread;
using predictors::ResourcePrefetchPredictor;
namespace {
// Enum for measuring statistics pertaining to observed request, responses and
// redirects.
enum RequestStats {
REQUEST_STATS_TOTAL_RESPONSES = 0,
REQUEST_STATS_TOTAL_PROCESSED_RESPONSES = 1,
REQUEST_STATS_NO_RESOURCE_REQUEST_INFO = 2,
REQUEST_STATS_NO_RENDER_FRAME_ID_FROM_REQUEST_INFO = 3,
REQUEST_STATS_MAX = 4,
};
// Specific to main frame requests.
enum MainFrameRequestStats {
MAIN_FRAME_REQUEST_STATS_TOTAL_REQUESTS = 0,
MAIN_FRAME_REQUEST_STATS_PROCESSED_REQUESTS = 1,
MAIN_FRAME_REQUEST_STATS_TOTAL_REDIRECTS = 2,
MAIN_FRAME_REQUEST_STATS_PROCESSED_REDIRECTS = 3,
MAIN_FRAME_REQUEST_STATS_TOTAL_RESPONSES = 4,
MAIN_FRAME_REQUEST_STATS_PROCESSED_RESPONSES = 5,
MAIN_FRAME_REQUEST_STATS_MAX = 6,
};
void ReportRequestStats(RequestStats stat) {
UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.RequestStats",
stat,
REQUEST_STATS_MAX);
}
void ReportMainFrameRequestStats(MainFrameRequestStats stat) {
UMA_HISTOGRAM_ENUMERATION("ResourcePrefetchPredictor.MainFrameRequestStats",
stat,
MAIN_FRAME_REQUEST_STATS_MAX);
}
bool SummarizeResponse(net::URLRequest* request,
ResourcePrefetchPredictor::URLRequestSummary* summary) {
const content::ResourceRequestInfo* info =
content::ResourceRequestInfo::ForRequest(request);
if (!info) {
ReportRequestStats(REQUEST_STATS_NO_RESOURCE_REQUEST_INFO);
return false;
}
int render_process_id, render_frame_id;
if (!info->GetAssociatedRenderFrame(&render_process_id, &render_frame_id)) {
ReportRequestStats(REQUEST_STATS_NO_RENDER_FRAME_ID_FROM_REQUEST_INFO);
return false;
}
summary->navigation_id.render_process_id = render_process_id;
summary->navigation_id.render_frame_id = render_frame_id;
summary->navigation_id.main_frame_url = request->first_party_for_cookies();
summary->navigation_id.creation_time = request->creation_time();
summary->resource_url = request->original_url();
summary->resource_type = info->GetResourceType();
request->GetMimeType(&summary->mime_type);
summary->was_cached = request->was_cached();
// Use the mime_type to determine the resource type for subresources since
// types such as PREFETCH, SUB_RESOURCE, etc are not useful.
if (summary->resource_type != content::RESOURCE_TYPE_MAIN_FRAME) {
summary->resource_type =
ResourcePrefetchPredictor::GetResourceTypeFromMimeType(
summary->mime_type,
summary->resource_type);
}
return true;
}
} // namespace
namespace chrome_browser_net {
ResourcePrefetchPredictorObserver::ResourcePrefetchPredictorObserver(
ResourcePrefetchPredictor* predictor)
: predictor_(predictor->AsWeakPtr()) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
ResourcePrefetchPredictorObserver::~ResourcePrefetchPredictorObserver() {
CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
BrowserThread::CurrentlyOn(BrowserThread::IO));
}
void ResourcePrefetchPredictorObserver::OnRequestStarted(
net::URLRequest* request,
content::ResourceType resource_type,
int child_id,
int frame_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
if (resource_type == content::RESOURCE_TYPE_MAIN_FRAME)
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_TOTAL_REQUESTS);
if (!ResourcePrefetchPredictor::ShouldRecordRequest(request, resource_type))
return;
ResourcePrefetchPredictor::URLRequestSummary summary;
summary.navigation_id.render_process_id = child_id;
summary.navigation_id.render_frame_id = frame_id;
summary.navigation_id.main_frame_url = request->first_party_for_cookies();
summary.resource_url = request->original_url();
summary.resource_type = resource_type;
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&ResourcePrefetchPredictor::RecordURLRequest,
predictor_,
summary));
if (resource_type == content::RESOURCE_TYPE_MAIN_FRAME)
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_PROCESSED_REQUESTS);
}
void ResourcePrefetchPredictorObserver::OnRequestRedirected(
const GURL& redirect_url,
net::URLRequest* request) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
const content::ResourceRequestInfo* request_info =
content::ResourceRequestInfo::ForRequest(request);
if (request_info &&
request_info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME) {
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_TOTAL_REDIRECTS);
}
if (!ResourcePrefetchPredictor::ShouldRecordRedirect(request))
return;
ResourcePrefetchPredictor::URLRequestSummary summary;
if (!SummarizeResponse(request, &summary))
return;
summary.redirect_url = redirect_url;
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&ResourcePrefetchPredictor::RecordURLRedirect,
predictor_,
summary));
if (request_info &&
request_info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME) {
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_PROCESSED_REDIRECTS);
}
}
void ResourcePrefetchPredictorObserver::OnResponseStarted(
net::URLRequest* request) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
ReportRequestStats(REQUEST_STATS_TOTAL_RESPONSES);
const content::ResourceRequestInfo* request_info =
content::ResourceRequestInfo::ForRequest(request);
if (request_info &&
request_info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME) {
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_TOTAL_RESPONSES);
}
if (!ResourcePrefetchPredictor::ShouldRecordResponse(request))
return;
ResourcePrefetchPredictor::URLRequestSummary summary;
if (!SummarizeResponse(request, &summary))
return;
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&ResourcePrefetchPredictor::RecordURLResponse,
predictor_,
summary));
ReportRequestStats(REQUEST_STATS_TOTAL_PROCESSED_RESPONSES);
if (request_info &&
request_info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME) {
ReportMainFrameRequestStats(MAIN_FRAME_REQUEST_STATS_PROCESSED_RESPONSES);
}
}
} // namespace chrome_browser_net
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