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// Copyright (c) 2012 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 "content/browser/download/mhtml_generation_manager.h"
#include "base/bind.h"
#include "base/files/file.h"
#include "base/stl_util.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_process_host_observer.h"
#include "content/public/browser/web_contents.h"
#include "content/common/view_messages.h"
namespace content {
class MHTMLGenerationManager::Job : public RenderProcessHostObserver {
public:
Job();
virtual ~Job();
void SetWebContents(WebContents* web_contents);
base::File browser_file() { return browser_file_.Pass(); }
void set_browser_file(base::File file) { browser_file_ = file.Pass(); }
int process_id() { return process_id_; }
int routing_id() { return routing_id_; }
GenerateMHTMLCallback callback() { return callback_; }
void set_callback(GenerateMHTMLCallback callback) { callback_ = callback; }
// RenderProcessHostObserver:
virtual void RenderProcessExited(RenderProcessHost* host,
base::ProcessHandle handle,
base::TerminationStatus status,
int exit_code) OVERRIDE;
virtual void RenderProcessHostDestroyed(RenderProcessHost* host) OVERRIDE;
private:
// The handle to the file the MHTML is saved to for the browser process.
base::File browser_file_;
// The IDs mapping to a specific contents.
int process_id_;
int routing_id_;
// The callback to call once generation is complete.
GenerateMHTMLCallback callback_;
// The RenderProcessHost being observed, or NULL if none is.
RenderProcessHost* host_;
DISALLOW_COPY_AND_ASSIGN(Job);
};
MHTMLGenerationManager::Job::Job()
: process_id_(-1),
routing_id_(-1),
host_(NULL) {
}
MHTMLGenerationManager::Job::~Job() {
if (host_)
host_->RemoveObserver(this);
}
void MHTMLGenerationManager::Job::SetWebContents(WebContents* web_contents) {
process_id_ = web_contents->GetRenderProcessHost()->GetID();
routing_id_ = web_contents->GetRenderViewHost()->GetRoutingID();
host_ = web_contents->GetRenderProcessHost();
host_->AddObserver(this);
}
void MHTMLGenerationManager::Job::RenderProcessExited(
RenderProcessHost* host,
base::ProcessHandle handle,
base::TerminationStatus status,
int exit_code) {
MHTMLGenerationManager::GetInstance()->RenderProcessExited(this);
}
void MHTMLGenerationManager::Job::RenderProcessHostDestroyed(
RenderProcessHost* host) {
host_ = NULL;
}
MHTMLGenerationManager* MHTMLGenerationManager::GetInstance() {
return Singleton<MHTMLGenerationManager>::get();
}
MHTMLGenerationManager::MHTMLGenerationManager() {
}
MHTMLGenerationManager::~MHTMLGenerationManager() {
STLDeleteValues(&id_to_job_);
}
void MHTMLGenerationManager::SaveMHTML(WebContents* web_contents,
const base::FilePath& file,
const GenerateMHTMLCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
int job_id = NewJob(web_contents, callback);
base::ProcessHandle renderer_process =
web_contents->GetRenderProcessHost()->GetHandle();
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&MHTMLGenerationManager::CreateFile, base::Unretained(this),
job_id, file, renderer_process));
}
void MHTMLGenerationManager::StreamMHTML(
WebContents* web_contents,
base::File browser_file,
const GenerateMHTMLCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
int job_id = NewJob(web_contents, callback);
base::ProcessHandle renderer_process =
web_contents->GetRenderProcessHost()->GetHandle();
IPC::PlatformFileForTransit renderer_file =
IPC::GetFileHandleForProcess(browser_file.GetPlatformFile(),
renderer_process, false);
FileAvailable(job_id, browser_file.Pass(), renderer_file);
}
void MHTMLGenerationManager::MHTMLGenerated(int job_id, int64 mhtml_data_size) {
JobFinished(job_id, mhtml_data_size);
}
void MHTMLGenerationManager::CreateFile(
int job_id, const base::FilePath& file_path,
base::ProcessHandle renderer_process) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::File browser_file(
file_path, base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
if (!browser_file.IsValid()) {
LOG(ERROR) << "Failed to create file to save MHTML at: " <<
file_path.value();
}
IPC::PlatformFileForTransit renderer_file =
IPC::GetFileHandleForProcess(browser_file.GetPlatformFile(),
renderer_process, false);
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&MHTMLGenerationManager::FileAvailable,
base::Unretained(this),
job_id,
base::Passed(&browser_file),
renderer_file));
}
void MHTMLGenerationManager::FileAvailable(
int job_id,
base::File browser_file,
IPC::PlatformFileForTransit renderer_file) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!browser_file.IsValid()) {
LOG(ERROR) << "Failed to create file";
JobFinished(job_id, -1);
return;
}
IDToJobMap::iterator iter = id_to_job_.find(job_id);
if (iter == id_to_job_.end()) {
NOTREACHED();
return;
}
Job* job = iter->second;
job->set_browser_file(browser_file.Pass());
RenderViewHost* rvh = RenderViewHost::FromID(
job->process_id(), job->routing_id());
if (!rvh) {
// The contents went away.
JobFinished(job_id, -1);
return;
}
rvh->Send(new ViewMsg_SavePageAsMHTML(rvh->GetRoutingID(), job_id,
renderer_file));
}
void MHTMLGenerationManager::JobFinished(int job_id, int64 file_size) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
IDToJobMap::iterator iter = id_to_job_.find(job_id);
if (iter == id_to_job_.end()) {
NOTREACHED();
return;
}
Job* job = iter->second;
job->callback().Run(file_size);
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&MHTMLGenerationManager::CloseFile, base::Unretained(this),
base::Passed(job->browser_file())));
id_to_job_.erase(job_id);
delete job;
}
void MHTMLGenerationManager::CloseFile(base::File file) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
file.Close();
}
int MHTMLGenerationManager::NewJob(WebContents* web_contents,
const GenerateMHTMLCallback& callback) {
static int id_counter = 0;
int job_id = id_counter++;
Job* job = new Job();
id_to_job_[job_id] = job;
job->SetWebContents(web_contents);
job->set_callback(callback);
return job_id;
}
void MHTMLGenerationManager::RenderProcessExited(Job* job) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
for (IDToJobMap::iterator it = id_to_job_.begin(); it != id_to_job_.end();
++it) {
if (it->second == job) {
JobFinished(it->first, -1);
return;
}
}
NOTREACHED();
}
} // namespace content
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