Initial upload of cronet for Android.

net/cronet/android/org_chromium_net_UrlRequestContext.cc

+// Copyright 2013 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 "net/cronet/android/org_chromium_net_UrlRequestContext.h"
+
+#include <stdio.h>
+
+#include "base/android/base_jni_registrar.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_registrar.h"
+#include "base/at_exit.h"
+#include "base/i18n/icu_util.h"
+#include "net/android/net_jni_registrar.h"
+#include "net/cronet/android/org_chromium_net_UrlRequest.h"
+#include "net/cronet/android/url_request_context_peer.h"
+#include "net/cronet/android/url_request_peer.h"
+
+// Version of this build of Chromium NET.
+#define CHROMIUM_NET_VERSION "1"
+
+namespace {
+
+const char kVersion[] = CHROMIUM_VERSION "/" CHROMIUM_NET_VERSION;
+const char kClassName[] = "org/chromium/net/UrlRequestContext";
+
+jclass g_class;
+jmethodID g_method_initNetworkThread;
+jfieldID g_field_mRequestContext;
+
+base::AtExitManager* g_at_exit_manager = NULL;
+
+// Stores a reference to the peer in a java field.
+void SetNativeObject(JNIEnv* env, jobject object, URLRequestContextPeer* peer) {
+  env->SetLongField(
+      object, g_field_mRequestContext, reinterpret_cast<jlong>(peer));
+}
+
+// Returns a reference to the peer, which is stored in a field of  the java
+// object.
+URLRequestContextPeer* GetNativeObject(JNIEnv* env, jobject object) {
+  return reinterpret_cast<URLRequestContextPeer*>(
+      env->GetLongField(object, g_field_mRequestContext));
+}
+
+// Delegate of URLRequestContextPeer that delivers callbacks to the Java layer.
+class JniURLRequestContextPeerDelegate
+    : public URLRequestContextPeer::URLRequestContextPeerDelegate {
+ public:
+  JniURLRequestContextPeerDelegate(JNIEnv* env, jobject owner)
+      : owner_(env->NewGlobalRef(owner)) {
+    env->GetJavaVM(&vm_);
+  }
+
+  virtual void OnContextInitialized(URLRequestContextPeer* context) OVERRIDE {
+    JNIEnv* env = GetEnv(vm_);
+    env->CallVoidMethod(owner_, g_method_initNetworkThread);
+    if (env->ExceptionOccurred()) {
+      env->ExceptionDescribe();
+      env->ExceptionClear();
+    }
+
+    // TODO(dplotnikov): figure out if we need to detach from the thread.
+    // The documentation says we should detach just before the thread exits.
+  }
+
+ protected:
+  virtual ~JniURLRequestContextPeerDelegate() {
+    GetEnv(vm_)->DeleteGlobalRef(owner_);
+  }
+
+ private:
+  jobject owner_;
+  JavaVM* vm_;
+};
+
+}  // namespace
+
+// Checks the available version of JNI. Also, caches Java reflection artifacts.
+jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+  JNIEnv* env;
+  if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+    return -1;
+  }
+
+  g_class = (jclass)env->NewGlobalRef(env->FindClass(kClassName));
+  g_method_initNetworkThread =
+      env->GetMethodID(g_class, "initNetworkThread", "()V");
+  g_field_mRequestContext = env->GetFieldID(g_class, "mRequestContext", "J");
+  if (!g_class || !g_method_initNetworkThread || !g_field_mRequestContext) {
+    return -1;
+  }
+
+  base::android::InitVM(vm);
+
+  if (!base::android::RegisterJni(env)) {
+    return -1;
+  }
+
+  if (!UrlRequestRegisterJni(env)) {
+    return -1;
+  }
+
+  if (!net::android::RegisterJni(env)) {
+    return -1;
+  }
+
+  g_at_exit_manager = new base::AtExitManager();
+
+  base::i18n::InitializeICU();
+
+  return JNI_VERSION_1_6;
+}
+
+JNIEnv* GetEnv(JavaVM* vm) {
+  // We need to make sure this native thread is attached to the JVM before
+  // we can call any Java methods.
+  JNIEnv* env;
+  if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) ==
+      JNI_EDETACHED) {
+    vm->AttachCurrentThread(&env, NULL);
+  }
+  return env;
+}
+
+URLRequestContextPeer* GetURLRequestContextPeer(JNIEnv* env,
+                                                jobject request_context) {
+  return GetNativeObject(env, request_context);
+}
+
+JNIEXPORT jstring JNICALL
+Java_org_chromium_net_UrlRequestContext_getVersion(JNIEnv* env,
+                                                   jobject object) {
+  return env->NewStringUTF(kVersion);
+}
+
+// Sets global user-agent to be used for all subsequent requests.
+JNIEXPORT void JNICALL
+Java_org_chromium_net_UrlRequestContext_nativeInitialize(JNIEnv* env,
+                                                         jobject object,
+                                                         jobject context,
+                                                         jstring user_agent,
+                                                         jint log_level) {
+  const char* user_agent_utf8 = env->GetStringUTFChars(user_agent, NULL);
+  std::string user_agent_string(user_agent_utf8);
+  env->ReleaseStringUTFChars(user_agent, user_agent_utf8);
+
+  // Set application context.
+  base::android::ScopedJavaLocalRef<jobject> scoped_context(env, context);
+  base::android::InitApplicationContext(env, scoped_context);
+
+  int logging_level = log_level;
+
+  // TODO(dplotnikov): set application context.
+  URLRequestContextPeer* peer = new URLRequestContextPeer(
+      new JniURLRequestContextPeerDelegate(env, object),
+      user_agent_string,
+      logging_level,
+      kVersion);
+  peer->AddRef();  // Hold onto this ref-counted object.
+
+  SetNativeObject(env, object, peer);
+
+  peer->Initialize();
+}
+
+// Releases native objects.
+JNIEXPORT void JNICALL
+Java_org_chromium_net_UrlRequestContext_nativeFinalize(JNIEnv* env,
+                                                       jobject object) {
+  // URLRequestContextPeer is a ref-counted object, so we need to release it
+  // instead of deleting outright.
+  GetNativeObject(env, object)->Release();
+  SetNativeObject(env, object, NULL);
+}