Cronet for iOS with C API for GRPC support.

components/cronet/ios/cronet_engine.mm

+// Copyright 2014 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.
+
+#import "components/cronet/ios/cronet_engine.h"
+
+#include "base/logging.h"
+#include "base/strings/sys_string_conversions.h"
+#import "components/cronet/ios/cronet_environment.h"
+
+static cronet::CronetEnvironment* g_chrome_net = NULL;
+
+static BOOL g_http2_enabled = YES;
+static BOOL g_quic_enabled = NO;
+static NSString* g_user_agent = nil;
+static NSString* g_ssl_key_log_file_name = nil;
+
+@implementation CronetEngine
+
++ (void)setHttp2Enabled:(BOOL)http2Enabled {
+  g_http2_enabled = http2Enabled;
+}
+
++ (void)setQuicEnabled:(BOOL)quicEnabled {
+  g_quic_enabled = quicEnabled;
+}
+
++ (void)setPartialUserAgent:(NSString*)userAgent {
+  g_user_agent = userAgent;
+}
+
++ (void)setSslKeyLogFileName:(NSString*)sslKeyLogFileName {
+  g_ssl_key_log_file_name = sslKeyLogFileName;
+}
+
++ (void)installInternal {
+  cronet::CronetEnvironment::Initialize();
+  std::string partial_user_agent = base::SysNSStringToUTF8(g_user_agent);
+  g_chrome_net = new cronet::CronetEnvironment(partial_user_agent);
+
+  g_chrome_net->set_http2_enabled(g_http2_enabled);
+  g_chrome_net->set_quic_enabled(g_quic_enabled);
+  g_chrome_net->set_ssl_key_log_file_name(
+      base::SysNSStringToUTF8(g_ssl_key_log_file_name));
+  g_chrome_net->Install();
+}
+
++ (void)install {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self installInternal];
+  });
+}
+
++ (void)startNetLogToFile:(NSString*)fileName logBytes:(BOOL)logBytes {
+  if (g_chrome_net && [fileName length]) {
+    g_chrome_net->StartNetLog([fileName UTF8String], logBytes);
+  }
+}
+
++ (void)stopNetLog {
+  if (g_chrome_net) {
+    return g_chrome_net->StopNetLog();
+  }
+}
+
++ (NSString*)userAgent {
+  if (!g_chrome_net) {
+    return nil;
+  }
+
+  std::string user_agent = g_chrome_net->user_agent();
+  return [NSString stringWithCString:user_agent.c_str()
+                            encoding:[NSString defaultCStringEncoding]];
+}
+
++ (cronet_engine*)getGlobalEngine {
+  DCHECK(g_chrome_net);
+  if (g_chrome_net) {
+    static cronet_engine engine;
+    engine.obj = g_chrome_net;
+    return &engine;
+  }
+  return nil;
+}
+
+@end