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// 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 "chrome/browser/android/download/download_manager_service.h"
#include "base/android/jni_string.h"
#include "base/message_loop/message_loop.h"
#include "base/time/time.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "content/public/browser/android/download_controller_android.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/download_item.h"
#include "jni/DownloadManagerService_jni.h"
using base::android::JavaParamRef;
using base::android::ConvertJavaStringToUTF8;
using base::android::ConvertUTF8ToJavaString;
namespace {
// The retry interval when resuming/canceling a download. This is needed because
// when the browser process is launched, we have to wait until the download
// history get loaded before a download can be resumed/cancelled. However,
// we don't want to retry after a long period of time as the same download Id
// can be reused later.
const int kRetryIntervalInMilliseconds = 3000;
}
// static
bool DownloadManagerService::RegisterDownloadManagerService(JNIEnv* env) {
return RegisterNativesImpl(env);
}
static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& jobj) {
Profile* profile = ProfileManager::GetActiveUserProfile();
content::DownloadManager* manager =
content::BrowserContext::GetDownloadManager(profile);
DownloadManagerService* service =
new DownloadManagerService(env, jobj, manager);
return reinterpret_cast<intptr_t>(service);
}
DownloadManagerService::DownloadManagerService(
JNIEnv* env,
jobject obj,
content::DownloadManager* manager)
: java_ref_(env, obj), manager_(manager) {
manager_->AddObserver(this);
}
DownloadManagerService::~DownloadManagerService() {
if (manager_)
manager_->RemoveObserver(this);
}
void DownloadManagerService::ResumeDownload(JNIEnv* env,
jobject obj,
uint32_t download_id,
jstring fileName) {
ResumeDownloadInternal(download_id, ConvertJavaStringToUTF8(env, fileName),
true);
}
void DownloadManagerService::CancelDownload(JNIEnv* env,
jobject obj,
uint32_t download_id) {
CancelDownloadInternal(download_id, true);
}
void DownloadManagerService::ManagerGoingDown(
content::DownloadManager* manager) {
manager_ = nullptr;
}
void DownloadManagerService::ResumeDownloadItem(content::DownloadItem* item,
const std::string& fileName) {
if (!item->CanResume()) {
OnResumptionFailed(item->GetId(), fileName);
return;
}
item->AddObserver(content::DownloadControllerAndroid::Get());
item->Resume();
if (!resume_callback_for_testing_.is_null())
resume_callback_for_testing_.Run(true);
}
void DownloadManagerService::ResumeDownloadInternal(uint32_t download_id,
const std::string& fileName,
bool retry) {
if (!manager_) {
OnResumptionFailed(download_id, fileName);
return;
}
content::DownloadItem* item = manager_->GetDownload(download_id);
if (item) {
ResumeDownloadItem(item, fileName);
return;
}
if (!retry) {
OnResumptionFailed(download_id, fileName);
return;
}
// Post a delayed task to wait for the download history to load the download
// item. If the download item is not loaded when the delayed task runs, show
// an download failed notification. Alternatively, we can have the
// DownloadManager inform us when a download item is created. However, there
// is no guarantee when the download item will be created, since the newly
// created item might not be loaded from download history. So user might wait
// indefinitely to see the failed notification. See http://crbug.com/577893.
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&DownloadManagerService::ResumeDownloadInternal,
base::Unretained(this), download_id, fileName, false),
base::TimeDelta::FromMilliseconds(kRetryIntervalInMilliseconds));
}
void DownloadManagerService::CancelDownloadInternal(uint32_t download_id,
bool retry) {
if (!manager_)
return;
content::DownloadItem* item = manager_->GetDownload(download_id);
if (item) {
item->Cancel(true);
return;
}
if (retry) {
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE, base::Bind(&DownloadManagerService::CancelDownloadInternal,
base::Unretained(this), download_id, false),
base::TimeDelta::FromMilliseconds(kRetryIntervalInMilliseconds));
}
}
void DownloadManagerService::OnResumptionFailed(uint32_t download_id,
const std::string& fileName) {
if (!java_ref_.is_null()) {
JNIEnv* env = base::android::AttachCurrentThread();
Java_DownloadManagerService_onResumptionFailed(
env, java_ref_.obj(), download_id,
ConvertUTF8ToJavaString(env, fileName).obj());
}
if (!resume_callback_for_testing_.is_null())
resume_callback_for_testing_.Run(false);
}
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