Use 64kb read buffer in CRNHttpProtocolHandler on iOS.

components/cronet/ios/test/test_server.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/cronet/ios/test/test_server.h"
 
 #include <utility>
 
 #include "base/bind.h"
+#include "base/format_macros.h"
+#include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_request.h"
 #include "net/test/embedded_test_server/http_response.h"
 
 namespace {
 
 const char kEchoHeaderPath[] = "/EchoHeader?";
 const char kSetCookiePath[] = "/SetCookie?";
+const char kBigDataPath[] = "/BigData";
 
 std::unique_ptr<net::EmbeddedTestServer> g_test_server;
+base::LazyInstance<std::string>::Leaky g_big_data_body =
+    LAZY_INSTANCE_INITIALIZER;
 
 std::unique_ptr<net::test_server::HttpResponse> EchoHeaderInRequest(
     const net::test_server::HttpRequest& request) {
   std::string header_name;
   std::string header_value;
   DCHECK(base::StartsWith(request.relative_url, kEchoHeaderPath,
                           base::CompareCase::INSENSITIVE_ASCII));
 
   header_name = request.relative_url.substr(strlen(kEchoHeaderPath));
   auto it = request.headers.find(header_name);
   if (it != request.headers.end())
     header_value = it->second;
   auto http_response = base::MakeUnique<net::test_server::BasicHttpResponse>();
   http_response->set_content(header_value);
   return std::move(http_response);
 }
 
+std::unique_ptr<net::test_server::HttpResponse> ReturnBigDataInResponse(
+    const net::test_server::HttpRequest& request) {
+  DCHECK(base::StartsWith(request.relative_url, kBigDataPath,
+                          base::CompareCase::INSENSITIVE_ASCII));
+  return base::MakeUnique<net::test_server::RawHttpResponse>(
+      std::string(), g_big_data_body.Get());
+}
+
 std::unique_ptr<net::test_server::HttpResponse> SetAndEchoCookieInResponse(
     const net::test_server::HttpRequest& request) {
   std::string cookie_line;
   DCHECK(base::StartsWith(request.relative_url, kSetCookiePath,
                           base::CompareCase::INSENSITIVE_ASCII));
   cookie_line = request.relative_url.substr(strlen(kSetCookiePath));
   auto http_response = base::MakeUnique<net::test_server::BasicHttpResponse>();
   http_response->set_content(cookie_line);
   http_response->AddCustomHeader("Set-Cookie", cookie_line);
   return std::move(http_response);
 }
 
 std::unique_ptr<net::test_server::HttpResponse> CronetTestRequestHandler(
     const net::test_server::HttpRequest& request) {
   if (base::StartsWith(request.relative_url, kEchoHeaderPath,
                        base::CompareCase::INSENSITIVE_ASCII)) {
     return EchoHeaderInRequest(request);
   }
   if (base::StartsWith(request.relative_url, kSetCookiePath,
                        base::CompareCase::INSENSITIVE_ASCII)) {
     return SetAndEchoCookieInResponse(request);
   }
+  if (base::StartsWith(request.relative_url, kBigDataPath,
+                       base::CompareCase::INSENSITIVE_ASCII)) {
+    return ReturnBigDataInResponse(request);
+  }
   return base::MakeUnique<net::test_server::BasicHttpResponse>();
 }
 
 }  // namespace
 
 namespace cronet {
 
 /* static */
 bool TestServer::Start() {
   DCHECK(!g_test_server.get());
@@ skipping 12 matching lines @@
 std::string TestServer::GetEchoHeaderURL(const std::string& header_name) {
   DCHECK(g_test_server);
   return g_test_server->GetURL(kEchoHeaderPath + header_name).spec();
 }
 
 std::string TestServer::GetSetCookieURL(const std::string& cookie_line) {
   DCHECK(g_test_server);
   return g_test_server->GetURL(kSetCookiePath + cookie_line).spec();
 }
 
+std::string TestServer::PrepareBigDataURL(long data_size) {
+  DCHECK(g_test_server);
+  // Response line with headers.

[kapishnikov, 2017/04/19 18:19:01]

Since g_big_data_body is global, can we add a check here to verify that the
g_big_data_body contains null, 0-length data? This will force the previous
caller to release the data before this method can be called again.

[mef, 2017/04/19 19:04:48]

Done.

+  std::string response_builder;
+  base::StringAppendF(&response_builder, "HTTP/1.1 200 OK\r\n");
+  base::StringAppendF(&response_builder, "Content-Length: %" PRIuS "\r\n",
+                      data_size);
+  base::StringAppendF(&response_builder, "\r\n");
+  response_builder += std::string(data_size, 'c');
+  g_big_data_body.Get() = response_builder;
+  return g_test_server->GetURL(kBigDataPath).spec();
+}
+
 }  // namespace cronet