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// Copyright (c) 2011 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/extensions/extension_save_page_api.h"
#include "base/file_util.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/extension_tab_util.h"
#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
#include "content/browser/child_process_security_policy.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/browser/download/mhtml_generation_manager.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"
using content::BrowserThread;
// Error messages.
const char* const kFileTooBigError = "The MHTML file generated is too big.";
const char* const kMHTMLGenerationFailedError = "Failed to generate MHTML.";
const char* const kSizeRetrievalError =
"Failed to retrieve size of generated MHTML.";
const char* const kTemporaryFileError = "Failed to create a temporary file.";
const char* const kTabClosedError = "Cannot find the tab for thie request.";
SavePageAsMHTMLFunction::SavePageAsMHTMLFunction() : tab_id_(0) {
}
SavePageAsMHTMLFunction::~SavePageAsMHTMLFunction() {
}
bool SavePageAsMHTMLFunction::RunImpl() {
EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &tab_id_));
AddRef(); // Balanced in ReturnFailure/ReturnSuccess()
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
NewRunnableMethod(this, &SavePageAsMHTMLFunction::CreateTemporaryFile));
return true;
}
void SavePageAsMHTMLFunction::CreateTemporaryFile() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
// TODO(jcivelli): http://crbug.com/97489 we don't clean-up the temporary file
// at this point. It must be done before we can take that API
// out of experimental.
bool success = file_util::CreateTemporaryFile(&mhtml_path_);
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
NewRunnableMethod(this, &SavePageAsMHTMLFunction::TemporaryFileCreated,
success));
}
void SavePageAsMHTMLFunction::TemporaryFileCreated(bool success) {
if (!success) {
ReturnFailure(kTemporaryFileError);
return;
}
Browser* browser = NULL;
TabContentsWrapper* tab_contents_wrapper = NULL;
if (!ExtensionTabUtil::GetTabById(tab_id_, profile(), include_incognito(),
&browser, NULL, &tab_contents_wrapper, NULL)) {
ReturnFailure(kTabClosedError);
return;
}
TabContents* tab_contents = tab_contents_wrapper->tab_contents();
registrar_.Add(
this, content::NOTIFICATION_MHTML_GENERATED,
content::Source<RenderViewHost>(tab_contents->render_view_host()));
// TODO(jcivelli): we should listen for navigation in the tab, tab closed,
// renderer died.
g_browser_process->mhtml_generation_manager()->GenerateMHTML(
tab_contents, mhtml_path_);
}
void SavePageAsMHTMLFunction::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK(type == content::NOTIFICATION_MHTML_GENERATED);
const MHTMLGenerationManager::NotificationDetails* save_details =
content::Details<MHTMLGenerationManager::NotificationDetails>(details).
ptr();
if (mhtml_path_ != save_details->file_path) {
// This could happen if there are concurrent MHTML generations going on for
// the same tab.
LOG(WARNING) << "Received a notification that MHTML was generated but for a"
" different file.";
return;
}
registrar_.RemoveAll();
if (save_details->file_size <= 0) {
ReturnFailure(kMHTMLGenerationFailedError);
return;
}
if (save_details->file_size > std::numeric_limits<int>::max()) {
ReturnFailure(kFileTooBigError);
return;
}
ReturnSuccess(save_details->file_size);
}
void SavePageAsMHTMLFunction::ReturnFailure(const std::string& error) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
error_ = error;
SendResponse(false);
Release(); // Balanced in Run()
}
void SavePageAsMHTMLFunction::ReturnSuccess(int64 file_size) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
int child_id = render_view_host()->process()->id();
ChildProcessSecurityPolicy::GetInstance()->GrantReadFile(
child_id, mhtml_path_);
DictionaryValue* dict = new DictionaryValue();
result_.reset(dict);
dict->SetString("mhtmlFilePath", mhtml_path_.value());
dict->SetInteger("mhtmlFileLength", file_size);
SendResponse(true);
Release(); // Balanced in Run()
}
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