android_webview/native/aw_message_port_service_impl.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "android_webview/native/aw_message_port_service_impl.h"
   6
   7 #include "android_webview/browser/aw_browser_context.h"
   8 #include "android_webview/browser/aw_message_port_message_filter.h"
   9 #include "android_webview/native/aw_contents.h"
  10 #include "base/android/jni_array.h"
  11 #include "base/android/jni_string.h"
  12 #include "base/bind.h"
  13 #include "content/public/browser/browser_thread.h"
  14 #include "content/public/browser/message_port_provider.h"
  15 #include "jni/AwMessagePortService_jni.h"
  16
  17 namespace android_webview {
  18
  19 using base::android::AttachCurrentThread;
  20 using base::android::ConvertJavaStringToUTF16;
  21 using base::android::ConvertUTF16ToJavaString;
  22 using base::android::ScopedJavaGlobalRef;
  23 using base::android::ScopedJavaLocalRef;
  24 using base::android::ToJavaIntArray;
  25 using content::BrowserThread;
  26 using content::MessagePortProvider;
  27
  28 //static
  29 AwMessagePortServiceImpl* AwMessagePortServiceImpl::GetInstance() {
  30   return static_cast<AwMessagePortServiceImpl*>(
  31       AwBrowserContext::GetDefault()->GetMessagePortService());
  32 }
  33
  34 AwMessagePortServiceImpl::AwMessagePortServiceImpl() {
  35 }
  36
  37 AwMessagePortServiceImpl::~AwMessagePortServiceImpl() {
  38   JNIEnv* env = AttachCurrentThread();
  39   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
  40   if (obj.is_null())
  41     return;
  42   Java_AwMessagePortService_unregisterNativeAwMessagePortService(env,
  43                                                                  obj.obj());
  44 }
  45
  46 void AwMessagePortServiceImpl::Init(JNIEnv* env, jobject obj) {
  47   java_ref_ = JavaObjectWeakGlobalRef(env, obj);
  48 }
  49
  50 void AwMessagePortServiceImpl::CreateMessageChannel(
  51     JNIEnv* env,
  52     jobjectArray ports,
  53     scoped_refptr<AwMessagePortMessageFilter> filter) {
  54   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  55
  56   ScopedJavaGlobalRef<jobjectArray>* j_ports =
  57       new ScopedJavaGlobalRef<jobjectArray>();
  58   j_ports->Reset(env, ports);
  59
  60   int* portId1 = new int;
  61   int* portId2 = new int;
  62   BrowserThread::PostTaskAndReply(
  63       BrowserThread::IO,
  64       FROM_HERE,
  65       base::Bind(&AwMessagePortServiceImpl::CreateMessageChannelOnIOThread,
  66                  base::Unretained(this),
  67                  filter,
  68                  portId1,
  69                  portId2),
  70       base::Bind(&AwMessagePortServiceImpl::OnMessageChannelCreated,
  71                  base::Unretained(this),
  72                  base::Owned(j_ports),
  73                  base::Owned(portId1),
  74                  base::Owned(portId2)));
  75 }
  76
  77 void AwMessagePortServiceImpl::OnConvertedWebToAppMessage(
  78     int message_port_id,
  79     const base::ListValue& message,
  80     const std::vector<int>& sent_message_port_ids) {
  81   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  82   JNIEnv* env = AttachCurrentThread();
  83   ScopedJavaLocalRef<jobject> jobj = java_ref_.get(env);
  84   if (jobj.is_null())
  85     return;
  86
  87   base::string16 value;
  88   if (!message.GetString(0, &value)) {
  89     LOG(WARNING) << "Converting post message to a string failed for port "
  90         << message_port_id;
  91     return;
  92   }
  93
  94   if (message.GetSize() != 1) {
  95     NOTREACHED();
  96     return;
  97   }
  98
  99   // Add the ports to AwMessagePortService.
 100   for (const auto& iter : sent_message_port_ids) {
 101     AddPort(iter, ports_[message_port_id]);
 102   }
 103
 104   ScopedJavaLocalRef<jstring> jmsg = ConvertUTF16ToJavaString(env, value);
 105   ScopedJavaLocalRef<jintArray> jports =
 106       ToJavaIntArray(env, sent_message_port_ids);
 107   Java_AwMessagePortService_onReceivedMessage(env,
 108                                               jobj.obj(),
 109                                               message_port_id,
 110                                               jmsg.obj(),
 111                                               jports.obj());
 112 }
 113
 114 void AwMessagePortServiceImpl::OnMessagePortMessageFilterClosing(
 115     AwMessagePortMessageFilter* filter) {
 116   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 117   for (MessagePorts::iterator iter = ports_.begin();
 118        iter != ports_.end(); iter++) {
 119     if (iter->second == filter) {
 120       ports_.erase(iter);
 121     }
 122   }
 123 }
 124
 125 void AwMessagePortServiceImpl::PostAppToWebMessage(JNIEnv* env, jobject obj,
 126     int sender_id, jstring message, jintArray sent_ports) {
 127   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 128   base::string16* j_message = new base::string16;
 129   ConvertJavaStringToUTF16(env, message, j_message);
 130   std::vector<int>* j_sent_ports = new std::vector<int>;
 131   if (sent_ports != nullptr)
 132     base::android::JavaIntArrayToIntVector(env, sent_ports, j_sent_ports);
 133
 134   BrowserThread::PostTask(
 135       BrowserThread::IO,
 136       FROM_HERE,
 137       base::Bind(&AwMessagePortServiceImpl::PostAppToWebMessageOnIOThread,
 138                  base::Unretained(this),
 139                  sender_id,
 140                  base::Owned(j_message),
 141                  base::Owned(j_sent_ports)));
 142 }
 143
 144 // The message port service cannot immediately close the port, because
 145 // it is possible that messages are still queued in the renderer process
 146 // waiting for a conversion. Instead, it sends a special message with
 147 // a flag which indicates that this message port should be closed.
 148 void AwMessagePortServiceImpl::ClosePort(JNIEnv* env, jobject obj,
 149     int message_port_id) {
 150   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 151   BrowserThread::PostTask(
 152       BrowserThread::IO,
 153       FROM_HERE,
 154       base::Bind(&AwMessagePortServiceImpl::PostClosePortMessage,
 155                  base::Unretained(this),
 156                  message_port_id));
 157 }
 158
 159 void AwMessagePortServiceImpl::ReleaseMessages(JNIEnv* env, jobject obj,
 160     int message_port_id) {
 161   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 162   BrowserThread::PostTask(
 163       BrowserThread::IO,
 164       FROM_HERE,
 165       base::Bind(&MessagePortProvider::ReleaseMessages, message_port_id));
 166 }
 167
 168 void AwMessagePortServiceImpl::RemoveSentPorts(
 169     const std::vector<int>& sent_ports) {
 170   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 171   // Remove the filters that are associated with the transferred ports
 172   for (const auto& iter : sent_ports)
 173     ports_.erase(iter);
 174 }
 175
 176 void AwMessagePortServiceImpl::PostAppToWebMessageOnIOThread(
 177     int sender_id,
 178     base::string16* message,
 179     std::vector<int>* sent_ports) {
 180   RemoveSentPorts(*sent_ports);
 181   ports_[sender_id]->SendAppToWebMessage(sender_id, *message, *sent_ports);
 182 }
 183
 184 void AwMessagePortServiceImpl::PostClosePortMessage(int message_port_id) {
 185   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 186   ports_[message_port_id]->SendClosePortMessage(message_port_id);
 187 }
 188
 189 void AwMessagePortServiceImpl::CleanupPort(int message_port_id) {
 190   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 191   ports_.erase(message_port_id);
 192 }
 193
 194 void AwMessagePortServiceImpl::CreateMessageChannelOnIOThread(
 195     scoped_refptr<AwMessagePortMessageFilter> filter,
 196     int* portId1,
 197     int* portId2) {
 198   MessagePortProvider::CreateMessageChannel(filter.get(), portId1, portId2);
 199   MessagePortProvider::HoldMessages(*portId1);
 200   MessagePortProvider::HoldMessages(*portId2);
 201   AddPort(*portId1, filter.get());
 202   AddPort(*portId2, filter.get());
 203 }
 204
 205 void AwMessagePortServiceImpl::OnMessageChannelCreated(
 206     ScopedJavaGlobalRef<jobjectArray>* ports,
 207     int* port1,
 208     int* port2) {
 209   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 210   JNIEnv* env = AttachCurrentThread();
 211   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
 212   if (obj.is_null())
 213     return;
 214   Java_AwMessagePortService_onMessageChannelCreated(env, obj.obj(), *port1,
 215       *port2, ports->obj());
 216 }
 217
 218 // Adds a new port to the message port service.
 219 void AwMessagePortServiceImpl::AddPort(int message_port_id,
 220                                        AwMessagePortMessageFilter* filter) {
 221   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 222   if (ports_.count(message_port_id)) {
 223     NOTREACHED();
 224     return;
 225   }
 226   ports_[message_port_id] = filter;
 227 }
 228
 229 bool RegisterAwMessagePortService(JNIEnv* env) {
 230   return RegisterNativesImpl(env);
 231 }
 232
 233 // static
 234 jlong InitAwMessagePortService(JNIEnv* env, jobject obj) {
 235   AwMessagePortServiceImpl* service = AwMessagePortServiceImpl::GetInstance();
 236   service->Init(env, obj);
 237   return reinterpret_cast<intptr_t>(service);
 238 }
 239
 240 }  // namespace android_webview