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/**
* @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 "llui.h"
#include "llversioninfo.h"
#include "llviewercontrol.h"
#include "reader.h"
// These two are concatenated with the language specifiers to form a complete Google Translate URL
const char* LLTranslate::m_GoogleURL = "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=";
const char* LLTranslate::m_GoogleLangSpec = "&langpair=";
float LLTranslate::m_GoogleTimeout = 5;
LLSD LLTranslate::m_Header;
// These constants are for the GET header.
const char* LLTranslate::m_AcceptHeader = "Accept";
const char* LLTranslate::m_AcceptType = "text/plain";
const char* LLTranslate::m_AgentHeader = "User-Agent";
// These constants are in the JSON returned from Google
const char* LLTranslate::m_GoogleData = "responseData";
const char* LLTranslate::m_GoogleTranslation = "translatedText";
const char* LLTranslate::m_GoogleLanguage = "detectedSourceLanguage";
// virtual
void LLTranslate::TranslationReceiver::completedRaw( U32 status,
const std::string& reason,
const LLChannelDescriptors& channels,
const LLIOPipe::buffer_ptr_t& buffer)
{
if (200 <= status && status < 300)
{
LLBufferStream istr(channels, buffer.get());
std::stringstream strstrm;
strstrm << istr.rdbuf();
const std::string result = strstrm.str();
std::string translation;
std::string detected_language;
if (!parseGoogleTranslate(result, translation, detected_language))
{
handleFailure();
return;
}
// 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_language);
}
else
{
LL_WARNS("Translate") << "HTTP request for Google Translate failed with status " << status << ", reason: " << reason << LL_ENDL;
handleFailure();
}
}
//static
void LLTranslate::translateMessage(LLHTTPClient::ResponderPtr &result, const std::string &from_lang, const std::string &to_lang, const std::string &mesg)
{
std::string url;
getTranslateUrl(url, from_lang, to_lang, mesg);
std::string user_agent = llformat("%s %d.%d.%d (%d)",
LLVersionInfo::getChannel().c_str(),
LLVersionInfo::getMajor(),
LLVersionInfo::getMinor(),
LLVersionInfo::getPatch(),
LLVersionInfo::getBuild());
if (!m_Header.size())
{
m_Header.insert(m_AcceptHeader, LLSD(m_AcceptType));
m_Header.insert(m_AgentHeader, LLSD(user_agent));
}
LLHTTPClient::get(url, result, m_Header, m_GoogleTimeout);
}
//static
void LLTranslate::getTranslateUrl(std::string &translate_url, const std::string &from_lang, const std::string &to_lang, const std::string &mesg)
{
char * curl_str = curl_escape(mesg.c_str(), mesg.size());
std::string const escaped_mesg(curl_str);
curl_free(curl_str);
translate_url = m_GoogleURL
+ escaped_mesg + m_GoogleLangSpec
+ from_lang // 'from' language; empty string for auto
+ "%7C" // |
+ to_lang; // 'to' language
}
//static
bool LLTranslate::parseGoogleTranslate(const std::string& body, std::string &translation, std::string &detected_language)
{
Json::Value root;
Json::Reader reader;
bool success = reader.parse(body, root);
if (!success)
{
LL_WARNS("Translate") << "Non valid response from Google Translate API: '" << reader.getFormatedErrorMessages() << "'" << LL_ENDL;
return false;
}
translation = root[m_GoogleData].get(m_GoogleTranslation, "").asString();
detected_language = root[m_GoogleData].get(m_GoogleLanguage, "").asString();
return true;
}
//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;
}
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