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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/base/protobuf_http_request.h"
#include <optional>
#include "base/functional/callback.h"
#include "remoting/base/protobuf_http_client_messages.pb.h"
#include "remoting/base/protobuf_http_request_config.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "third_party/protobuf/src/google/protobuf/message_lite.h"
namespace remoting {
namespace {
constexpr int kMaxResponseSizeBytes = 512 * 1024; // 512 KB
} // namespace
ProtobufHttpRequest::ProtobufHttpRequest(
std::unique_ptr<ProtobufHttpRequestConfig> config)
: ProtobufHttpRequestBase(std::move(config)) {}
ProtobufHttpRequest::~ProtobufHttpRequest() = default;
void ProtobufHttpRequest::SetTimeoutDuration(base::TimeDelta timeout_duration) {
timeout_duration_ = timeout_duration;
}
void ProtobufHttpRequest::OnAuthFailed(const HttpStatus& status) {
// OnAuthFailed() is called before the invalidator is set.
RunResponseCallback(status, /* run_invalidator= */ false);
}
void ProtobufHttpRequest::StartRequestInternal(
network::mojom::URLLoaderFactory* loader_factory) {
DCHECK(response_callback_);
// Safe to use unretained as callback will not be called once |url_loader_| is
// deleted.
url_loader_->DownloadToString(
loader_factory,
base::BindOnce(&ProtobufHttpRequest::OnResponse, base::Unretained(this)),
kMaxResponseSizeBytes);
}
base::TimeDelta ProtobufHttpRequest::GetRequestTimeoutDuration() const {
return timeout_duration_;
}
void ProtobufHttpRequest::OnResponse(std::optional<std::string> response_body) {
HttpStatus url_loader_status = GetUrlLoaderStatus();
if (url_loader_status.ok()) {
RunResponseCallback(ParseResponse(std::move(response_body)),
/* run_invalidator= */ true);
return;
}
// Parse the status from the response.
protobufhttpclient::Status api_status;
if (response_body.has_value() && api_status.ParseFromString(*response_body) &&
api_status.code() > 0) {
HttpStatus actual_status{api_status, *response_body};
if (!HandleRetry(actual_status.error_code())) {
RunResponseCallback(actual_status, /* run_invalidator= */ true);
}
} else if (!HandleRetry(url_loader_status.error_code())) {
// Fallback to just return the status from URL loader.
RunResponseCallback(url_loader_status, /* run_invalidator= */ true);
}
}
HttpStatus ProtobufHttpRequest::ParseResponse(
std::optional<std::string> response_body) {
if (!response_body.has_value()) {
LOG(ERROR) << "Server returned no response body";
return HttpStatus(net::ERR_EMPTY_RESPONSE);
}
if (!response_message_->ParseFromString(*response_body)) {
LOG(ERROR) << "Failed to parse response body";
return HttpStatus(net::ERR_INVALID_RESPONSE);
}
return HttpStatus::OK();
}
void ProtobufHttpRequest::RunResponseCallback(const HttpStatus& status,
bool run_invalidator) {
// Move variables out of |this| as the callback can potentially delete |this|.
base::OnceClosure invalidator =
run_invalidator ? std::move(invalidator_) : base::OnceClosure();
// Drop unowned reference before invoking callback which destroys it.
response_message_ = nullptr;
std::move(response_callback_).Run(status);
// NOTE: Don't access member variables here, since |this| might have been
// deleted by the callback.
if (invalidator) {
std::move(invalidator).Run();
}
}
} // namespace remoting
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