/indra/newview/lltranslate.cpp
https://bitbucket.org/lindenlab/viewer-beta/ · C++ · 400 lines · 296 code · 52 blank · 52 comment · 34 complexity · 814cad99cda58d0ab5ca5d61a8ca19c8 MD5 · raw file
- /**
- * @file lltranslate.cpp
- * @brief Functions for translating text via Google Translate.
- *
- * $LicenseInfo:firstyear=2009&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
- #include "llviewerprecompiledheaders.h"
- #include "lltranslate.h"
- #include <curl/curl.h>
- #include "llbufferstream.h"
- #include "lltrans.h"
- #include "llui.h"
- #include "llversioninfo.h"
- #include "llviewercontrol.h"
- #include "reader.h"
- // virtual
- void LLGoogleTranslationHandler::getTranslateURL(
- std::string &url,
- const std::string &from_lang,
- const std::string &to_lang,
- const std::string &text) const
- {
- url = std::string("https://www.googleapis.com/language/translate/v2?key=")
- + getAPIKey() + "&q=" + LLURI::escape(text) + "&target=" + to_lang;
- if (!from_lang.empty())
- {
- url += "&source=" + from_lang;
- }
- }
- // virtual
- void LLGoogleTranslationHandler::getKeyVerificationURL(
- std::string& url,
- const std::string& key) const
- {
- url = std::string("https://www.googleapis.com/language/translate/v2/languages?key=")
- + key + "&target=en";
- }
- // virtual
- bool LLGoogleTranslationHandler::parseResponse(
- int& status,
- const std::string& body,
- std::string& translation,
- std::string& detected_lang,
- std::string& err_msg) const
- {
- Json::Value root;
- Json::Reader reader;
- if (!reader.parse(body, root))
- {
- err_msg = reader.getFormatedErrorMessages();
- return false;
- }
- if (!root.isObject()) // empty response? should not happen
- {
- return false;
- }
- if (status != STATUS_OK)
- {
- // Request failed. Extract error message from the response.
- parseErrorResponse(root, status, err_msg);
- return false;
- }
- // Request succeeded, extract translation from the response.
- return parseTranslation(root, translation, detected_lang);
- }
- // virtual
- bool LLGoogleTranslationHandler::isConfigured() const
- {
- return !getAPIKey().empty();
- }
- // static
- void LLGoogleTranslationHandler::parseErrorResponse(
- const Json::Value& root,
- int& status,
- std::string& err_msg)
- {
- const Json::Value& error = root.get("error", 0);
- if (!error.isObject() || !error.isMember("message") || !error.isMember("code"))
- {
- return;
- }
- err_msg = error["message"].asString();
- status = error["code"].asInt();
- }
- // static
- bool LLGoogleTranslationHandler::parseTranslation(
- const Json::Value& root,
- std::string& translation,
- std::string& detected_lang)
- {
- // JsonCpp is prone to aborting the program on failed assertions,
- // so be super-careful and verify the response format.
- const Json::Value& data = root.get("data", 0);
- if (!data.isObject() || !data.isMember("translations"))
- {
- return false;
- }
- const Json::Value& translations = data["translations"];
- if (!translations.isArray() || translations.size() == 0)
- {
- return false;
- }
- const Json::Value& first = translations[0U];
- if (!first.isObject() || !first.isMember("translatedText"))
- {
- return false;
- }
- translation = first["translatedText"].asString();
- detected_lang = first.get("detectedSourceLanguage", "").asString();
- return true;
- }
- // static
- std::string LLGoogleTranslationHandler::getAPIKey()
- {
- return gSavedSettings.getString("GoogleTranslateAPIKey");
- }
- // virtual
- void LLBingTranslationHandler::getTranslateURL(
- std::string &url,
- const std::string &from_lang,
- const std::string &to_lang,
- const std::string &text) const
- {
- url = std::string("http://api.microsofttranslator.com/v2/Http.svc/Translate?appId=")
- + getAPIKey() + "&text=" + LLURI::escape(text) + "&to=" + to_lang;
- if (!from_lang.empty())
- {
- url += "&from=" + from_lang;
- }
- }
- // virtual
- void LLBingTranslationHandler::getKeyVerificationURL(
- std::string& url,
- const std::string& key) const
- {
- url = std::string("http://api.microsofttranslator.com/v2/Http.svc/GetLanguagesForTranslate?appId=")
- + key;
- }
- // virtual
- bool LLBingTranslationHandler::parseResponse(
- int& status,
- const std::string& body,
- std::string& translation,
- std::string& detected_lang,
- std::string& err_msg) const
- {
- if (status != STATUS_OK)
- {
- static const std::string MSG_BEGIN_MARKER = "Message: ";
- size_t begin = body.find(MSG_BEGIN_MARKER);
- if (begin != std::string::npos)
- {
- begin += MSG_BEGIN_MARKER.size();
- }
- else
- {
- begin = 0;
- err_msg.clear();
- }
- size_t end = body.find("</p>", begin);
- err_msg = body.substr(begin, end-begin);
- LLStringUtil::replaceString(err_msg, "
", ""); // strip CR
- return false;
- }
- // Sample response: <string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Hola</string>
- size_t begin = body.find(">");
- if (begin == std::string::npos || begin >= (body.size() - 1))
- {
- begin = 0;
- }
- else
- {
- ++begin;
- }
- size_t end = body.find("</string>", begin);
- detected_lang = ""; // unsupported by this API
- translation = body.substr(begin, end-begin);
- LLStringUtil::replaceString(translation, "
", ""); // strip CR
- return true;
- }
- // virtual
- bool LLBingTranslationHandler::isConfigured() const
- {
- return !getAPIKey().empty();
- }
- // static
- std::string LLBingTranslationHandler::getAPIKey()
- {
- return gSavedSettings.getString("BingTranslateAPIKey");
- }
- LLTranslate::TranslationReceiver::TranslationReceiver(const std::string& from_lang, const std::string& to_lang)
- : mFromLang(from_lang)
- , mToLang(to_lang)
- , mHandler(LLTranslate::getPreferredHandler())
- {
- }
- // virtual
- void LLTranslate::TranslationReceiver::completedRaw(
- U32 http_status,
- const std::string& reason,
- const LLChannelDescriptors& channels,
- const LLIOPipe::buffer_ptr_t& buffer)
- {
- LLBufferStream istr(channels, buffer.get());
- std::stringstream strstrm;
- strstrm << istr.rdbuf();
- const std::string body = strstrm.str();
- std::string translation, detected_lang, err_msg;
- int status = http_status;
- LL_DEBUGS("Translate") << "HTTP status: " << status << " " << reason << LL_ENDL;
- LL_DEBUGS("Translate") << "Response body: " << body << LL_ENDL;
- if (mHandler.parseResponse(status, body, translation, detected_lang, err_msg))
- {
- // Fix up the response
- LLStringUtil::replaceString(translation, "<", "<");
- LLStringUtil::replaceString(translation, ">",">");
- LLStringUtil::replaceString(translation, ""","\"");
- LLStringUtil::replaceString(translation, "'","'");
- LLStringUtil::replaceString(translation, "&","&");
- LLStringUtil::replaceString(translation, "'","'");
- handleResponse(translation, detected_lang);
- }
- else
- {
- if (err_msg.empty())
- {
- err_msg = LLTrans::getString("TranslationResponseParseError");
- }
- llwarns << "Translation request failed: " << err_msg << llendl;
- handleFailure(status, err_msg);
- }
- }
- LLTranslate::KeyVerificationReceiver::KeyVerificationReceiver(EService service)
- : mService(service)
- {
- }
- LLTranslate::EService LLTranslate::KeyVerificationReceiver::getService() const
- {
- return mService;
- }
- // virtual
- void LLTranslate::KeyVerificationReceiver::completedRaw(
- U32 http_status,
- const std::string& reason,
- const LLChannelDescriptors& channels,
- const LLIOPipe::buffer_ptr_t& buffer)
- {
- bool ok = (http_status == 200);
- setVerificationStatus(ok);
- }
- //static
- void LLTranslate::translateMessage(
- TranslationReceiverPtr &receiver,
- const std::string &from_lang,
- const std::string &to_lang,
- const std::string &mesg)
- {
- std::string url;
- receiver->mHandler.getTranslateURL(url, from_lang, to_lang, mesg);
- LL_DEBUGS("Translate") << "Sending translation request: " << url << LL_ENDL;
- sendRequest(url, receiver);
- }
- // static
- void LLTranslate::verifyKey(
- KeyVerificationReceiverPtr& receiver,
- const std::string& key)
- {
- std::string url;
- const LLTranslationAPIHandler& handler = getHandler(receiver->getService());
- handler.getKeyVerificationURL(url, key);
- LL_DEBUGS("Translate") << "Sending key verification request: " << url << LL_ENDL;
- sendRequest(url, receiver);
- }
- //static
- std::string LLTranslate::getTranslateLanguage()
- {
- std::string language = gSavedSettings.getString("TranslateLanguage");
- if (language.empty() || language == "default")
- {
- language = LLUI::getLanguage();
- }
- language = language.substr(0,2);
- return language;
- }
- // static
- bool LLTranslate::isTranslationConfigured()
- {
- return getPreferredHandler().isConfigured();
- }
- // static
- const LLTranslationAPIHandler& LLTranslate::getPreferredHandler()
- {
- EService service = SERVICE_BING;
- std::string service_str = gSavedSettings.getString("TranslationService");
- if (service_str == "google")
- {
- service = SERVICE_GOOGLE;
- }
- return getHandler(service);
- }
- // static
- const LLTranslationAPIHandler& LLTranslate::getHandler(EService service)
- {
- static LLGoogleTranslationHandler google;
- static LLBingTranslationHandler bing;
- if (service == SERVICE_GOOGLE)
- {
- return google;
- }
- return bing;
- }
- // static
- void LLTranslate::sendRequest(const std::string& url, LLHTTPClient::ResponderPtr responder)
- {
- static const float REQUEST_TIMEOUT = 5;
- static LLSD sHeader;
- if (!sHeader.size())
- {
- std::string user_agent = llformat("%s %d.%d.%d (%d)",
- LLVersionInfo::getChannel().c_str(),
- LLVersionInfo::getMajor(),
- LLVersionInfo::getMinor(),
- LLVersionInfo::getPatch(),
- LLVersionInfo::getBuild());
- sHeader.insert("Accept", "text/plain");
- sHeader.insert("User-Agent", user_agent);
- }
- LLHTTPClient::get(url, responder, sHeader, REQUEST_TIMEOUT);
- }