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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/safe_json_parser.h" |
| 6 |
| 7 #include "chrome/common/chrome_utility_messages.h" |
| 8 #include "content/public/browser/browser_thread.h" |
| 9 #include "content/public/browser/utility_process_host.h" |
| 10 |
| 11 using content::BrowserThread; |
| 12 using content::UtilityProcessHost; |
| 13 |
| 14 SafeJsonParser::SafeJsonParser(const std::string& unsafe_json, |
| 15 const SuccessCallback& success_callback, |
| 16 const ErrorCallback& error_callback) |
| 17 : unsafe_json_(unsafe_json), |
| 18 success_callback_(success_callback), |
| 19 error_callback_(error_callback) {} |
| 20 |
| 21 void SafeJsonParser::Start() { |
| 22 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 23 BrowserThread::PostTask( |
| 24 BrowserThread::IO, |
| 25 FROM_HERE, |
| 26 base::Bind(&SafeJsonParser::StartWorkOnIOThread, this)); |
| 27 } |
| 28 |
| 29 SafeJsonParser::~SafeJsonParser() {} |
| 30 |
| 31 void SafeJsonParser::StartWorkOnIOThread() { |
| 32 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 33 UtilityProcessHost* host = |
| 34 UtilityProcessHost::Create( |
| 35 this, base::MessageLoopProxy::current()); |
| 36 host->EnableZygote(); |
| 37 host->Send(new ChromeUtilityMsg_ParseJSON(unsafe_json_)); |
| 38 } |
| 39 |
| 40 void SafeJsonParser::OnJSONParseSucceeded(const base::ListValue& wrapper) { |
| 41 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 42 const Value* value = NULL; |
| 43 CHECK(wrapper.Get(0, &value)); |
| 44 |
| 45 parsed_json_.reset(value->DeepCopy()); |
| 46 ReportResults(); |
| 47 } |
| 48 |
| 49 void SafeJsonParser::OnJSONParseFailed(const std::string& error_message) { |
| 50 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 51 error_ = error_message; |
| 52 ReportResults(); |
| 53 } |
| 54 |
| 55 void SafeJsonParser::ReportResults() { |
| 56 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 57 |
| 58 BrowserThread::PostTask( |
| 59 BrowserThread::UI, |
| 60 FROM_HERE, |
| 61 base::Bind(&SafeJsonParser::ReportResultOnUIThread, this)); |
| 62 } |
| 63 |
| 64 void SafeJsonParser::ReportResultOnUIThread() { |
| 65 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 66 if (error_.empty() && parsed_json_) { |
| 67 if (!success_callback_.is_null()) |
| 68 success_callback_.Run(parsed_json_.Pass()); |
| 69 } else { |
| 70 if (!error_callback_.is_null()) |
| 71 error_callback_.Run(error_); |
| 72 } |
| 73 } |
| 74 |
| 75 bool SafeJsonParser::OnMessageReceived(const IPC::Message& message) { |
| 76 bool handled = true; |
| 77 IPC_BEGIN_MESSAGE_MAP(SafeJsonParser, message) |
| 78 IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ParseJSON_Succeeded, |
| 79 OnJSONParseSucceeded) |
| 80 IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ParseJSON_Failed, |
| 81 OnJSONParseFailed) |
| 82 IPC_MESSAGE_UNHANDLED(handled = false) |
| 83 IPC_END_MESSAGE_MAP() |
| 84 return handled; |
| 85 } |
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