[Android WebView] Call shouldInterceptRequest on a background thread

android_webview/browser/net/aw_stream_reader_job_delegate_impl.cc

+// Copyright 2015 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 "android_webview/browser/net/aw_stream_reader_job_delegate_impl.h"
+
+#include "android_webview/browser/input_stream.h"
+#include "base/strings/string_number_conversions.h"
+#include "net/http/http_response_headers.h"
+
+namespace android_webview {
+
+AwStreamReaderJobDelegateImpl::AwStreamReaderJobDelegateImpl(
+    scoped_ptr<AwWebResourceResponse> aw_web_resource_response)
+    : aw_web_resource_response_(aw_web_resource_response.Pass()) {
+  DCHECK(aw_web_resource_response_);
+}
+
+AwStreamReaderJobDelegateImpl::~AwStreamReaderJobDelegateImpl() {}
+
+scoped_ptr<InputStream> AwStreamReaderJobDelegateImpl::OpenInputStream(
+    JNIEnv* env,
+    const GURL& url) {
+  return aw_web_resource_response_->GetInputStream(env).Pass();
+}
+
+void AwStreamReaderJobDelegateImpl::OnInputStreamOpenFailed(
+    net::URLRequest* request,
+    bool* restart) {
+  *restart = false;
+}
+
+bool AwStreamReaderJobDelegateImpl::GetMimeType(
+    JNIEnv* env,
+    net::URLRequest* request,
+    android_webview::InputStream* stream,
+    std::string* mime_type) {
+  return aw_web_resource_response_->GetMimeType(env, mime_type);
+}
+
+bool AwStreamReaderJobDelegateImpl::GetCharset(
+    JNIEnv* env,
+    net::URLRequest* request,
+    android_webview::InputStream* stream,
+    std::string* charset) {
+  return aw_web_resource_response_->GetCharset(env, charset);
+}
+
+void AwStreamReaderJobDelegateImpl::AppendResponseHeaders(
+    JNIEnv* env,
+    net::HttpResponseHeaders* headers) {
+  int status_code;
+  std::string reason_phrase;
+  if (aw_web_resource_response_->GetStatusInfo(env, &status_code,
+                                               &reason_phrase)) {
+    std::string status_line("HTTP/1.1 ");
+    status_line.append(base::IntToString(status_code));
+    status_line.append(" ");
+    status_line.append(reason_phrase);
+    headers->ReplaceStatusLine(status_line);
+  }
+  aw_web_resource_response_->GetResponseHeaders(env, headers);
+}
+
+}  // namespace android_webview