Add Network.setSendRequestIdHeader and use it in headless

headless/public/util/protocol_handler_request_id_browsertest.cc

Index: headless/public/util/protocol_handler_request_id_browsertest.cc
diff --git a/headless/public/util/protocol_handler_request_id_browsertest.cc b/headless/public/util/protocol_handler_request_id_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..986bf1f1298e8c2b67327cfca53885cc8da72e6d
--- /dev/null
+++ b/headless/public/util/protocol_handler_request_id_browsertest.cc
@@ -0,0 +1,218 @@
+// Copyright 2017 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 "content/public/test/browser_test.h"
+#include "headless/public/devtools/domains/network.h"
+#include "headless/public/devtools/domains/page.h"
+#include "headless/public/headless_devtools_client.h"
+#include "headless/public/util/expedited_dispatcher.h"
+#include "headless/public/util/generic_url_request_job.h"
+#include "headless/public/util/url_fetcher.h"
+#include "headless/test/headless_browser_test.h"
+#include "net/url_request/url_request_job_factory.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+using testing::ContainerEq;
+
+namespace headless {
+
+namespace {
+// Keep in sync with X_DevTools_Request_Id defined in HTTPNames.json5.
+const char kDevtoolsRequestId[] = "X-DevTools-Request-Id";
+}  // namespace
+
+namespace {
+class RequestIdCorrelationProtocolHandler
+    : public net::URLRequestJobFactory::ProtocolHandler {
+ public:
+  explicit RequestIdCorrelationProtocolHandler(
+      scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner)
+      : test_delegate_(new TestDelegate(this)),
+        dispatcher_(new ExpeditedDispatcher(io_thread_task_runner)) {}
+
+  ~RequestIdCorrelationProtocolHandler() override {}
+
+  struct Response {
+    Response() {}
+    Response(const std::string& body, const std::string& mime_type)
+        : data("HTTP/1.1 200 OK\r\nContent-Type: " + mime_type + "\r\n\r\n" +
+               body) {}
+
+    std::string data;
+  };
+
+  void InsertResponse(const std::string& url, const Response& response) {
+    response_map_[url] = response;
+  }
+
+  const Response* GetResponse(const std::string& url) const {
+    std::map<std::string, Response>::const_iterator find_it =
+        response_map_.find(url);
+    if (find_it == response_map_.end())
+      return nullptr;
+    return &find_it->second;
+  }
+
+  class MockURLFetcher : public URLFetcher {
+   public:
+    explicit MockURLFetcher(
+        const RequestIdCorrelationProtocolHandler* protocol_handler)
+        : protocol_handler_(protocol_handler) {}
+    ~MockURLFetcher() override {}
+
+    // URLFetcher implementation:
+    void StartFetch(const GURL& url,
+                    const std::string& method,
+                    const net::HttpRequestHeaders& request_headers,
+                    ResultListener* result_listener) override {
+      const Response* response = protocol_handler_->GetResponse(url.spec());
+      if (!response)
+        result_listener->OnFetchStartError(net::ERR_FILE_NOT_FOUND);
+
+      // The header used for correlation should not be sent to the fetcher.
+      EXPECT_FALSE(request_headers.HasHeader(kDevtoolsRequestId));
+
+      result_listener->OnFetchCompleteExtractHeaders(
+          url, 200, response->data.c_str(), response->data.size());
+    }
+
+   private:
+    const RequestIdCorrelationProtocolHandler* protocol_handler_;
+
+    DISALLOW_COPY_AND_ASSIGN(MockURLFetcher);
+  };
+
+  class TestDelegate : public GenericURLRequestJob::Delegate {
+   public:
+    explicit TestDelegate(RequestIdCorrelationProtocolHandler* protocol_handler)
+        : protocol_handler_(protocol_handler) {}
+    ~TestDelegate() override {}
+
+    // GenericURLRequestJob::Delegate implementation:
+    bool BlockOrRewriteRequest(
+        const GURL& url,
+        const std::string& devtools_id,
+        const std::string& method,
+        const std::string& referrer,
+        GenericURLRequestJob::RewriteCallback callback) override {
+      protocol_handler_->url_to_devtools_id_[url.spec()] = devtools_id;
+      return false;
+    }
+
+    const GenericURLRequestJob::HttpResponse* MaybeMatchResource(
+        const GURL& url,
+        const std::string& devtools_id,
+        const std::string& method,
+        const net::HttpRequestHeaders& request_headers) override {
+      return nullptr;
+    }
+
+    void OnResourceLoadComplete(const GURL& final_url,
+                                const std::string& devtools_id,
+                                const std::string& mime_type,
+                                int http_response_code) override {}
+
+   private:
+    RequestIdCorrelationProtocolHandler* protocol_handler_;
+
+    DISALLOW_COPY_AND_ASSIGN(TestDelegate);
+  };
+
+  // net::URLRequestJobFactory::ProtocolHandler implementation::
+  net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) const override {
+    return new GenericURLRequestJob(
+        request, network_delegate, dispatcher_.get(),
+        base::MakeUnique<MockURLFetcher>(this), test_delegate_.get());
+  }
+
+  std::map<std::string, std::string> url_to_devtools_id_;
+
+ private:
+  std::unique_ptr<TestDelegate> test_delegate_;
+  std::unique_ptr<ExpeditedDispatcher> dispatcher_;
+  std::map<std::string, Response> response_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(RequestIdCorrelationProtocolHandler);
+};
+
+const char* kIndexHtml = R"(
+<html>
+<head>
+<link rel="stylesheet" type="text/css" href="style1.css">
+<link rel="stylesheet" type="text/css" href="style2.css">
+</head>
+<body>Hello.
+</body>
+</html>)";
+
+const char* kStyle1 = R"(
+.border {
+  border: 1px solid #000;
+})";
+
+const char* kStyle2 = R"(
+.border {
+  border: 2px solid #fff;
+})";
+
+}  // namespace
+
+class ProtocolHandlerRequestIdCorrelationTest
+    : public HeadlessAsyncDevTooledBrowserTest,
+      public network::Observer,
+      public page::Observer {
+ public:
+  void RunDevTooledTest() override {
+    EXPECT_TRUE(embedded_test_server()->Start());
+    devtools_client_->GetPage()->AddObserver(this);
+    devtools_client_->GetPage()->Enable();
+    devtools_client_->GetNetwork()->AddObserver(this);
+    devtools_client_->GetNetwork()->Enable();
+    devtools_client_->GetPage()->Navigate("http://foo.com/index.html");
+  }
+
+  ProtocolHandlerMap GetProtocolHandlers() override {
+    ProtocolHandlerMap protocol_handlers;
+    std::unique_ptr<RequestIdCorrelationProtocolHandler> http_handler(
+        new RequestIdCorrelationProtocolHandler(browser()->BrowserIOThread()));
+    http_handler_ = http_handler.get();
+    http_handler_->InsertResponse("http://foo.com/index.html",
+                                  {kIndexHtml, "text/html"});
+    http_handler_->InsertResponse("http://foo.com/style1.css",
+                                  {kStyle1, "text/css"});
+    http_handler_->InsertResponse("http://foo.com/style2.css",
+                                  {kStyle2, "text/css"});
+    protocol_handlers[url::kHttpScheme] = std::move(http_handler);
+    return protocol_handlers;
+  }
+
+  // network::Observer implementation:
+  void OnRequestWillBeSent(
+      const network::RequestWillBeSentParams& params) override {
+    url_to_devtools_id_[params.GetRequest()->GetUrl()] = params.GetRequestId();
+    EXPECT_FALSE(params.GetRequest()->GetHeaders()->HasKey(kDevtoolsRequestId));
+  }
+
+  // page::Observer implementation:
+  void OnLoadEventFired(const page::LoadEventFiredParams& params) override {
+    // Make sure that our protocol handler saw the same url : devtools ids as
+    // our OnRequestWillBeSent event listener did.
+    EXPECT_THAT(url_to_devtools_id_,
+                ContainerEq(http_handler_->url_to_devtools_id_));
+    EXPECT_EQ(3u, url_to_devtools_id_.size());
+    FinishAsynchronousTest();
+  }
+
+ private:
+  std::map<std::string, std::string> url_to_devtools_id_;
+  RequestIdCorrelationProtocolHandler* http_handler_;  // NOT OWNED
+};
+
+HEADLESS_ASYNC_DEVTOOLED_TEST_F(ProtocolHandlerRequestIdCorrelationTest);
+
+}  // namespace headless