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// Copyright 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 "content/test/mock_google_streaming_server.h"
#include <stddef.h>
#include <stdint.h>
#include "base/bind.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/sys_byteorder.h"
#include "base/values.h"
#include "content/browser/speech/google_streaming_remote_engine.h"
#include "content/browser/speech/proto/google_streaming_api.pb.h"
#include "content/browser/speech/speech_recognition_manager_impl.h"
#include "net/base/escape.h"
#include "net/base/net_errors.h"
#include "net/url_request/url_fetcher_delegate.h"
#include "net/url_request/url_request_status.h"
using base::HostToNet32;
using base::checked_cast;
namespace content {
MockGoogleStreamingServer::MockGoogleStreamingServer(Delegate* delegate)
: delegate_(delegate),
kDownstreamUrlFetcherId(
GoogleStreamingRemoteEngine::kDownstreamUrlFetcherIdForTesting),
kUpstreamUrlFetcherId(
GoogleStreamingRemoteEngine::kUpstreamUrlFetcherIdForTesting) {
url_fetcher_factory_.SetDelegateForTests(this);
}
MockGoogleStreamingServer::~MockGoogleStreamingServer() {
}
void MockGoogleStreamingServer::OnRequestStart(int fetcher_id) {
if (fetcher_id != kDownstreamUrlFetcherId)
return;
// Extract request argument from the the request URI.
std::string query = GetURLFetcher(true)->GetOriginalURL().query();
const net::UnescapeRule::Type kUnescapeAll =
net::UnescapeRule::NORMAL |
net::UnescapeRule::SPACES |
net::UnescapeRule::URL_SPECIAL_CHARS |
net::UnescapeRule::REPLACE_PLUS_WITH_SPACE;
for (const base::StringPiece& query_param :
base::SplitStringPiece(query, "&", base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY)) {
std::vector<std::string> param_parts = base::SplitString(
query_param, "=", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (param_parts.size() != 2)
continue;
std::string param_key = net::UnescapeURLComponent(param_parts[0],
kUnescapeAll);
std::string param_value = net::UnescapeURLComponent(param_parts[1],
kUnescapeAll);
if (param_key == "lang") {
request_language = param_value;
} else if (param_key == "lm") {
request_grammar = param_value;
}
}
delegate_->OnClientConnected();
}
void MockGoogleStreamingServer::OnChunkUpload(int fetcher_id) {
if (fetcher_id != kUpstreamUrlFetcherId)
return;
delegate_->OnClientAudioUpload();
if (GetURLFetcher(false)->did_receive_last_chunk())
delegate_->OnClientAudioUploadComplete();
}
void MockGoogleStreamingServer::OnRequestEnd(int fetcher_id) {
if (fetcher_id != kDownstreamUrlFetcherId)
return;
url_fetcher_factory_.RemoveFetcherFromMap(kDownstreamUrlFetcherId);
delegate_->OnClientDisconnected();
}
void MockGoogleStreamingServer::SimulateResult(
const SpeechRecognitionResult& result) {
proto::SpeechRecognitionEvent proto_event;
proto_event.set_status(proto::SpeechRecognitionEvent::STATUS_SUCCESS);
proto::SpeechRecognitionResult* proto_result = proto_event.add_result();
proto_result->set_final(!result.is_provisional);
for (size_t i = 0; i < result.hypotheses.size(); ++i) {
proto::SpeechRecognitionAlternative* proto_alternative =
proto_result->add_alternative();
const SpeechRecognitionHypothesis& hypothesis = result.hypotheses[i];
proto_alternative->set_confidence(hypothesis.confidence);
proto_alternative->set_transcript(base::UTF16ToUTF8(hypothesis.utterance));
}
std::string msg_string;
proto_event.SerializeToString(&msg_string);
// Prepend 4 byte prefix length indication to the protobuf message as
// envisaged by the google streaming recognition webservice protocol.
uint32_t prefix = HostToNet32(checked_cast<uint32_t>(msg_string.size()));
msg_string.insert(0, reinterpret_cast<char*>(&prefix), sizeof(prefix));
SimulateServerResponse(true, msg_string);
}
void MockGoogleStreamingServer::SimulateServerFailure() {
SimulateServerResponse(false, "");
}
void MockGoogleStreamingServer::SimulateMalformedResponse() {
std::string json =
"{\"status\":0,\"hypotheses\":""[{\"unknownkey\":\"hello\"}]}";
SimulateServerResponse(true, json);
}
const std::string& MockGoogleStreamingServer::GetRequestLanguage() const {
return request_language;
}
const std::string& MockGoogleStreamingServer::GetRequestGrammar() const {
return request_grammar;
}
void MockGoogleStreamingServer::SimulateServerResponse(
bool success, const std::string& http_response) {
net::TestURLFetcher* fetcher = GetURLFetcher(true);
fetcher->set_status(
net::URLRequestStatus::FromError(success ? net::OK : net::ERR_FAILED));
fetcher->set_response_code(success ? 200 : 500);
fetcher->SetResponseString(http_response);
fetcher->delegate()->OnURLFetchDownloadProgress(fetcher, 0, 0);
}
// Can return NULL if the SpeechRecognizer has not requested the connection yet.
net::TestURLFetcher* MockGoogleStreamingServer::GetURLFetcher(
bool downstream) const {
return url_fetcher_factory_.GetFetcherByID(
downstream ? kDownstreamUrlFetcherId : kUpstreamUrlFetcherId);
}
} // namespace content
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