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// Copyright (c) 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/devtools/devtools_protocol.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/strings/stringprintf.h"
namespace {
const char kErrorCodeParam[] = "code";
const char kErrorParam[] = "error";
const char kErrorMessageParam[] = "message";
const char kIdParam[] = "id";
const char kMethodParam[] = "method";
const char kParamsParam[] = "params";
const char kResultParam[] = "result";
// JSON RPC 2.0 spec: http://www.jsonrpc.org/specification#error_object
enum Error {
kErrorInvalidParams = -32602
};
} // namespace
// static
std::string DevToolsProtocol::SerializeCommand(
int command_id,
const std::string& method,
scoped_ptr<base::DictionaryValue> params) {
base::DictionaryValue command;
command.SetInteger(kIdParam, command_id);
command.SetString(kMethodParam, method);
if (params)
command.Set(kParamsParam, params.release());
std::string json_command;
base::JSONWriter::Write(&command, &json_command);
return json_command;
}
// static
scoped_ptr<base::DictionaryValue>
DevToolsProtocol::CreateInvalidParamsResponse(int command_id,
const std::string& param) {
scoped_ptr<base::DictionaryValue> response(new base::DictionaryValue());
base::DictionaryValue* error_object = new base::DictionaryValue();
response->Set(kErrorParam, error_object);
error_object->SetInteger(kErrorCodeParam, kErrorInvalidParams);
error_object->SetString(kErrorMessageParam,
base::StringPrintf("Missing or invalid '%s' parameter", param.c_str()));
return response.Pass();
}
// static
scoped_ptr<base::DictionaryValue>
DevToolsProtocol::CreateSuccessResponse(
int command_id,
scoped_ptr<base::DictionaryValue> result) {
scoped_ptr<base::DictionaryValue> response(new base::DictionaryValue());
response->SetInteger(kIdParam, command_id);
response->Set(kResultParam,
result ? result.release() : new base::DictionaryValue());
return response.Pass();
}
// static
bool DevToolsProtocol::ParseCommand(const base::DictionaryValue* command,
int* command_id,
std::string* method,
const base::DictionaryValue** params) {
if (!command)
return false;
if (!command->GetInteger(kIdParam, command_id) || *command_id < 0)
return false;
if (!command->GetString(kMethodParam, method))
return false;
if (!command->GetDictionary(kParamsParam, params))
*params = nullptr;
return true;
}
// static
bool DevToolsProtocol::ParseNotification(
const std::string& json,
std::string* method,
scoped_ptr<base::DictionaryValue>* params) {
scoped_ptr<base::Value> value(base::JSONReader::Read(json));
if (!value || !value->IsType(base::Value::TYPE_DICTIONARY))
return false;
scoped_ptr<base::DictionaryValue> dict(
static_cast<base::DictionaryValue*>(value.release()));
if (!dict->GetString(kMethodParam, method))
return false;
scoped_ptr<base::Value> params_value;
dict->Remove(kParamsParam, ¶ms_value);
if (params_value && params_value->IsType(base::Value::TYPE_DICTIONARY))
params->reset(static_cast<base::DictionaryValue*>(params_value.release()));
return true;
}
// static
bool DevToolsProtocol::ParseResponse(const std::string& json,
int* command_id,
int* error_code) {
scoped_ptr<base::Value> value(base::JSONReader::Read(json));
if (!value || !value->IsType(base::Value::TYPE_DICTIONARY))
return false;
scoped_ptr<base::DictionaryValue> dict(
static_cast<base::DictionaryValue*>(value.release()));
if (!dict->GetInteger(kIdParam, command_id))
return false;
*error_code = 0;
base::DictionaryValue* error_dict = nullptr;
if (dict->GetDictionary(kErrorParam, &error_dict))
error_dict->GetInteger(kErrorCodeParam, error_code);
return true;
}
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