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// Copyright 2014 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/devtools/protocol/devtools_protocol_handler.h"
#include "base/bind.h"
#include "base/json/json_reader.h"
namespace content {
namespace {
const char kIdParam[] = "id";
const char kMethodParam[] = "method";
const char kParamsParam[] = "params";
// JSON RPC 2.0 spec: http://www.jsonrpc.org/specification#error_object
const int kStatusParseError = -32700;
const int kStatusInvalidRequest = -32600;
const int kStatusNoSuchMethod = -32601;
scoped_ptr<base::DictionaryValue> TakeDictionary(base::DictionaryValue* dict,
const std::string& key) {
scoped_ptr<base::Value> value;
dict->Remove(key, &value);
base::DictionaryValue* result = nullptr;
if (value)
value.release()->GetAsDictionary(&result);
return make_scoped_ptr(result);
}
} // namespace
DevToolsProtocolHandler::DevToolsProtocolHandler(bool handle_generic_errors,
const Notifier& notifier)
: client_(notifier),
handle_generic_errors_(handle_generic_errors),
dispatcher_(notifier) {
}
DevToolsProtocolHandler::~DevToolsProtocolHandler() {
}
scoped_ptr<base::DictionaryValue>
DevToolsProtocolHandler::ParseCommand(const std::string& message) {
std::string parse_error;
scoped_ptr<base::Value> value(
base::JSONReader::ReadAndReturnError(message, 0, nullptr, &parse_error));
if (!value) {
if (handle_generic_errors_) {
client_.SendError(DevToolsProtocolClient::kNoId,
Response(kStatusParseError, parse_error));
}
return nullptr;
}
if (!value->IsType(base::Value::TYPE_DICTIONARY)) {
if (handle_generic_errors_) {
client_.SendError(DevToolsProtocolClient::kNoId,
Response(kStatusInvalidRequest, "Not a dictionary"));
}
return nullptr;
}
return make_scoped_ptr(static_cast<base::DictionaryValue*>(value.release()));
}
bool DevToolsProtocolHandler::HandleCommand(
scoped_ptr<base::DictionaryValue> command) {
int id = DevToolsProtocolClient::kNoId;
std::string method;
bool ok = command->GetInteger(kIdParam, &id) && id >= 0;
ok = ok && command->GetString(kMethodParam, &method);
if (!ok) {
if (handle_generic_errors_) {
client_.SendError(id, Response(kStatusInvalidRequest, "Invalid request"));
return true;
}
return false;
}
DevToolsProtocolDispatcher::CommandHandler command_handler(
dispatcher_.FindCommandHandler(method));
if (command_handler.is_null()) {
if (handle_generic_errors_) {
client_.SendError(id, Response(kStatusNoSuchMethod, "No such method"));
return true;
}
return false;
}
return command_handler.Run(id, TakeDictionary(command.get(), kParamsParam));
}
} // namespace content
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