[OBSOLETE] Reporting: Initial implementation.

components/reporting/core/browser/reporting_uploader.cc

+// Copyright 2016 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 "components/reporting/core/browser/reporting_uploader.h"
+
+#include "base/memory/ptr_util.h"
+
+namespace {
+const char kUploadContentType[] = "application/report";
+}  // namespace
+
+namespace reporting {
+
+namespace {
+
+ReportingUploader::Outcome ResponseCodeToOutcome(int response_code) {
+  if (response_code >= 200 && response_code <= 299)
+    return ReportingUploader::SUCCESS;
+  if (response_code == 410)
+    return ReportingUploader::REMOVE_ENDPOINT;
+  return ReportingUploader::FAILURE;
+}
+
+class ReportingUploaderImpl : public ReportingUploader,
+                              net::URLFetcherDelegate {
+ public:
+  ReportingUploaderImpl(scoped_refptr<net::URLRequestContextGetter> context) {}
+  ~ReportingUploaderImpl() override {}
+
+  // Section 4.4.
+  void AttemptDelivery(const GURL& url,
+                       const std::string& json,
+                       const Callback& callback) override {
+    std::unique_ptr<net::URLFetcher> fetcher(
+        net::URLFetcher::Create(url, net::URLFetcher::POST, this));
+    fetcher->SetRequestContext(context_.get());
+    fetcher->SetAutomaticallyRetryOn5xx(false);
+    fetcher->SetUploadData(kUploadContentType, json);
+    // This inherently sets mode = "no-cors", but that doesn't matter, because
+    // the origins that are included in the upload don't actually get to see
+    // the response.
+    //
+    // This inherently skips Service Worker, too.
+    fetcher->Start();
+
+    // Have to grab this as a reference to ensure fetcher.get() happens before
+    // std::move(fetcher).
+    std::unique_ptr<Upload>& upload = uploads_[fetcher.get()];
+    upload = base::MakeUnique<Upload>(std::move(fetcher), callback);
+  }
+
+  // net::URLFetcherDelegate implementation:
+  void OnURLFetchComplete(const net::URLFetcher* fetcher) override {
+    UploadMap::iterator it = uploads_.find(fetcher);
+    std::unique_ptr<Upload> upload = std::move(it->second);
+    uploads_.erase(it);
+
+    upload->second.Run(ResponseCodeToOutcome(fetcher->GetResponseCode()));
+    // Deletes fetcher (upload->first) when upload goes out of scope and is
+    // deleted.
+  }
+
+ private:
+  using Upload = std::pair<std::unique_ptr<net::URLFetcher>, Callback>;
+  using UploadMap = std::map<const net::URLFetcher*, std::unique_ptr<Upload>>;
+
+  scoped_refptr<net::URLRequestContextGetter> context_;
+  UploadMap uploads_;
+};
+
+}  // namespace
+
+// static
+std::unique_ptr<ReportingUploader> ReportingUploader::Create(
+    scoped_refptr<net::URLRequestContextGetter> context) {
+  return base::MakeUnique<ReportingUploaderImpl>(context);
+}
+
+}  // namespace reporting