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// 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 "chrome/browser/safe_json_parser.h"
#include "chrome/common/extensions/chrome_utility_extensions_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/utility_process_host.h"
using content::BrowserThread;
using content::UtilityProcessHost;
SafeJsonParser::SafeJsonParser(const std::string& unsafe_json,
const SuccessCallback& success_callback,
const ErrorCallback& error_callback)
: unsafe_json_(unsafe_json),
success_callback_(success_callback),
error_callback_(error_callback) {}
void SafeJsonParser::Start() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&SafeJsonParser::StartWorkOnIOThread, this));
}
SafeJsonParser::~SafeJsonParser() {}
void SafeJsonParser::StartWorkOnIOThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
UtilityProcessHost* host =
UtilityProcessHost::Create(this, base::MessageLoopProxy::current().get());
host->Send(new ChromeUtilityMsg_ParseJSON(unsafe_json_));
}
void SafeJsonParser::OnJSONParseSucceeded(const base::ListValue& wrapper) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
const base::Value* value = NULL;
CHECK(wrapper.Get(0, &value));
parsed_json_.reset(value->DeepCopy());
ReportResults();
}
void SafeJsonParser::OnJSONParseFailed(const std::string& error_message) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
error_ = error_message;
ReportResults();
}
void SafeJsonParser::ReportResults() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&SafeJsonParser::ReportResultOnUIThread, this));
}
void SafeJsonParser::ReportResultOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (error_.empty() && parsed_json_) {
if (!success_callback_.is_null())
success_callback_.Run(parsed_json_.Pass());
} else {
if (!error_callback_.is_null())
error_callback_.Run(error_);
}
}
bool SafeJsonParser::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SafeJsonParser, message)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ParseJSON_Succeeded,
OnJSONParseSucceeded)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ParseJSON_Failed,
OnJSONParseFailed)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
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