#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "url/gurl.h"
+#if defined(SPDY_PROXY_AUTH_ORIGIN)
+#include "net/http/http_response_headers.h"
+#endif
+
using blink::WebDataSource;
using blink::WebFrame;
using blink::WebPerformance;
return static_cast<URLPattern::SchemeMasks>(0);
}
+// Helper function to check for string in 'via' header. Returns true if
+// |via_value| is one of the values listed in the Via header and the response
+// was fetched via a proxy.
+bool ViaHeaderContains(WebFrame* frame, const std::string& via_value) {
+ const char kViaHeaderName[] = "Via";
+
+ DocumentState* document_state =
+ DocumentState::FromDataSource(frame->dataSource());
+ if (!document_state->was_fetched_via_proxy())
+ return false;
+
+ std::vector<std::string> values;
+ // Multiple via headers have already been coalesced and hence each value
+ // separated by a comma corresponds to a proxy. The value added by a proxy is
+ // not expected to contain any commas.
+ // Example., Via: 1.0 Compression proxy, 1.1 Google promise preview
+ base::SplitString(
+ frame->dataSource()->response().httpHeaderField(kViaHeaderName).utf8(),
+ ',', &values);
+ return std::find(values.begin(), values.end(), via_value) != values.end();
+}
+
// Returns true if the data reduction proxy was used. Note, this function will
// produce a false positive if a page is fetched using SPDY and using a proxy,
-// and |kDatReductionProxyViaValue| is added to the Via header.
-// TODO(bengr): Plumb the hostname of the proxy from |HttpNetworkTransaction|
-// and check if it matches |SPDY_PROXY_AUTH_ORIGIN|.
+// and the data reduction proxy's via value is added to the Via header.
+// TODO(bengr): Plumb the hostname of the proxy and check if it matches
+// |SPDY_PROXY_AUTH_ORIGIN|.
bool DataReductionProxyWasUsed(WebFrame* frame) {
#if defined(SPDY_PROXY_AUTH_ORIGIN)
- const char kViaHeaderName[] = "Via";
- const char kDatReductionProxyViaValue[] = "1.1 Chrome Compression Proxy";
-
DocumentState* document_state =
DocumentState::FromDataSource(frame->dataSource());
if (!document_state->was_fetched_via_proxy())
return false;
- std::string via_header(base::UTF16ToUTF8(
- frame->dataSource()->response().httpHeaderField(kViaHeaderName)));
- return via_header.find(kDatReductionProxyViaValue) != std::string::npos;
-#endif
+ std::string via_header =
+ base::UTF16ToUTF8(frame->dataSource()->response().httpHeaderField("Via"));
+
+ if (via_header.empty())
+ return false;
+ std::string headers = "HTTP/1.1 200 OK\nVia: " + via_header + "\n\n";
+ // Produce raw headers, expected by the |HttpResponseHeaders| constructor.
+ std::replace(headers.begin(), headers.end(), '\n', '\0');
+ scoped_refptr<net::HttpResponseHeaders> response_headers(
+ new net::HttpResponseHeaders(headers));
+ return response_headers->IsChromeProxyResponse();
+#else
return false;
+#endif
}
// Returns true if the provided URL is a referrer string that came from
return kNoExperiment;
}
-// Appends "cerivrj_*" and "gcjeid" query parameters from preview_url to url.
-// Returns true if "cerivrj_*" query is found.
-// This will be used only for search results URLs.
-bool AppendPreviewQueryFromURL(const GURL& preview_url, GURL* url) {
- bool preview_query_found = false;
- for (net::QueryIterator it(preview_url); !it.IsAtEnd(); it.Advance()) {
- const std::string param_name = it.GetKey();
- bool is_preview = StartsWithASCII(param_name, "cerivrj_", true);
- if (url && (is_preview || param_name == "gcjeid"))
- net::AppendQueryParameter(*url, param_name, it.GetValue());
- preview_query_found = preview_query_found || is_preview;
- }
- return preview_query_found;
-}
-
-// Returns true if the provided referrer URL is the preview URL of the current
-// URL. Preview URL differs from original only with "cerivrj_*", "gcjeid" query
-// parameters.
-bool IsReferrerPreviewOfURL(const GURL& url,
- const base::string16& referrer_str) {
- GURL referrer(referrer_str);
- if (referrer.is_valid()) {
- GURL generated_preview_url(url);
- // Now try to copy "cerivrj_*" and "gcjeid" paramters to url and check if
- // they exactly match.
- if (AppendPreviewQueryFromURL(referrer, &generated_preview_url))
- return generated_preview_url == referrer;
- }
- return false;
-}
-
// Returns preview state by looking at url and referer url.
-void GetPreviewState(const GURL& url,
- const base::string16& referrer,
+void GetPreviewState(WebFrame* frame,
bool came_from_websearch,
bool data_reduction_proxy_was_used,
GwsPreviewState* preview_state,
int* preview_experiment_id) {
// Conditions for GWS preview are,
// 1. Data reduction proxy was used.
- // 2. URL is loaded from web search.
- // If the URL contains "cerivrj_*' query parameter record under
- // "Preview".
+ // Determine the preview state (PREVIEW, PREVIEW_WAS_SHOWN, PREVIEW_NOT_USED)
+ // by inspecting the Via header.
if (data_reduction_proxy_was_used) {
if (came_from_websearch) {
- *preview_state =
- AppendPreviewQueryFromURL(url, NULL) ? PREVIEW : PREVIEW_NOT_USED;
- } else if (IsReferrerPreviewOfURL(url, referrer)) {
+ *preview_state = ViaHeaderContains(
+ frame, "1.1 Google Promise Preview") ? PREVIEW : PREVIEW_NOT_USED;
+ } else if (ViaHeaderContains(frame, "1.1 Google Promise Original")) {
*preview_state = PREVIEW_WAS_SHOWN;
- *preview_experiment_id = GetQueryStringBasedExperiment(GURL(referrer));
+ *preview_experiment_id = GetQueryStringBasedExperiment(
+ GURL(frame->document().referrer()));
}
}
}
GwsPreviewState preview_state = PREVIEW_NONE;
int preview_experiment_id = websearch_chrome_joint_experiment_id;
- GetPreviewState(frame->document().url(), frame->document().referrer(),
- came_from_websearch, data_reduction_proxy_was_used,
+ GetPreviewState(frame, came_from_websearch, data_reduction_proxy_was_used,
&preview_state, &preview_experiment_id);
// Times based on the Web Timing metrics.
projects / platform / framework / web / crosswalk.git / blobdiff