blob: 3f58dd8d03cb89b2247439103a731adccc1c155e [file] [log] [blame]
// Copyright 2014 The Chromium OS 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 <chromeos/dbus/utils.h>
#include <tuple>
#include <vector>
#include <base/bind.h>
#include <base/memory/scoped_ptr.h>
#include <chromeos/errors/error_codes.h>
#include <chromeos/strings/string_utils.h>
namespace chromeos {
namespace dbus_utils {
std::unique_ptr<dbus::Response> CreateDBusErrorResponse(
dbus::MethodCall* method_call,
const std::string& error_name,
const std::string& error_message) {
auto resp = dbus::ErrorResponse::FromMethodCall(
method_call, error_name, error_message);
return std::unique_ptr<dbus::Response>(resp.release());
}
std::unique_ptr<dbus::Response> GetDBusError(dbus::MethodCall* method_call,
const chromeos::Error* error) {
CHECK(error) << "Error object must be specified";
std::string error_name = DBUS_ERROR_FAILED; // Default error code.
std::string error_message;
// Special case for "dbus" error domain.
// Pop the error code and message from the error chain and use them as the
// actual D-Bus error message.
if (error->GetDomain() == errors::dbus::kDomain) {
error_name = error->GetCode();
error_message = error->GetMessage();
error = error->GetInnerError();
}
// Append any inner errors to the error message.
while (error) {
// Format error string as "domain/code:message".
if (!error_message.empty())
error_message += ';';
error_message +=
error->GetDomain() + '/' + error->GetCode() + ':' + error->GetMessage();
error = error->GetInnerError();
}
return CreateDBusErrorResponse(method_call, error_name, error_message);
}
void AddDBusError(chromeos::ErrorPtr* error,
const std::string& dbus_error_name,
const std::string& dbus_error_message) {
std::vector<std::string> parts = string_utils::Split(dbus_error_message, ";");
std::vector<std::tuple<std::string, std::string, std::string>> errors;
for (const std::string& part : parts) {
// Each part should be in format of "domain/code:message"
size_t slash_pos = part.find('/');
size_t colon_pos = part.find(':');
if (slash_pos != std::string::npos && colon_pos != std::string::npos &&
slash_pos < colon_pos) {
// If we have both '/' and ':' and in proper order, then we have a
// correctly encoded error object.
std::string domain = part.substr(0, slash_pos);
std::string code = part.substr(slash_pos + 1, colon_pos - slash_pos - 1);
std::string message = part.substr(colon_pos + 1);
errors.emplace_back(domain, code, message);
} else if (slash_pos == std::string::npos &&
colon_pos == std::string::npos && errors.empty()) {
// If we don't have both '/' and ':' and this is the first error object,
// then we had a D-Bus error at the top of the error chain.
errors.emplace_back(errors::dbus::kDomain, dbus_error_name, part);
} else {
// We have a malformed part. The whole D-Bus error was most likely
// not generated by GetDBusError(). To be safe, stop parsing it
// and return the error as received from D-Bus.
errors.clear(); // Remove any errors accumulated so far.
errors.emplace_back(
errors::dbus::kDomain, dbus_error_name, dbus_error_message);
break;
}
}
// Go backwards and add the parsed errors to the error chain.
for (auto it = errors.crbegin(); it != errors.crend(); ++it) {
Error::AddTo(
error, FROM_HERE, std::get<0>(*it), std::get<1>(*it), std::get<2>(*it));
}
}
} // namespace dbus_utils
} // namespace chromeos