WMicrosoftTranslate.h
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#ifndef WMICROSOFTTRANSLATE_H
#define WMICROSOFTTRANSLATE_H
#define NO_SHLWAPI_STRFCNS
#include <windows.h>
#include <wininet.h>
#include <shlwapi.h>
#include <strsafe.h>
class WMicrosoftTranslate
{
public:
// Error Codes
enum
{
TRANSLATE_NO_ERROR,
TRANSLATE_ERROR_CANNOT_INIT_CONNECTION,
TRANSLATE_ERROR_INVALID_CLIENT,
TRANSLATE_ERROR_CANNOT_SEND_REQUEST,
TRANSLATE_ERROR_CANNOT_GET_ACCESS_TOKEN,
TRANSLATE_ERROR_CANNOT_GET_TRANSLATION
};
WMicrosoftTranslate(LPCTSTR id = (LPCTSTR)0);
void setClient(LPCSTR, LPCSTR);
size_t getTranslate(LPCWSTR, LPCSTR, LPCSTR, LPSTR dest = (LPSTR)0);
private:
size_t urlEncode(LPCSTR, LPSTR szUrl = (LPSTR)0, bool force = false);
size_t getQueryLen(LPCSTR, LPCSTR);
void setQuery(LPSTR, LPCSTR, LPCSTR);
void createReqbody1();
void createReqbody2(LPCWSTR, LPCSTR, LPCSTR);
LPSTR getReply(HINTERNET);
size_t searchMemory(LPCVOID, size_t, LPCVOID, size_t, size_t Offset = 0);
bool getAccessToken();
HINTERNET hIntSession;
HINTERNET hHttpSession;
HINTERNET hHttpRequest;
LPSTR ClientId;
LPSTR ClientSecret;
LPSTR ReqBody;
LPSTR ReqBody2;
LPSTR Reply;
LPSTR AccessToken;
LPSTR TranslatedDialog;
LPCTSTR Appid;
unsigned __int32 TokenLife;
unsigned __int32 ErrorCode;
size_t AccessTokenLen;
size_t len1;
size_t len2;
size_t TranslatedDialogSize;
DWORD tick;
};
#endif // WMICROSOFTTRANSLATE_H
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WMicrosoftTranslate.cpp
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/*
* Microsoft Transoate API wrapper by 3735943886
* Dependent libraries : wininet, shlwapi
*/
#include "WmicrosoftTranslate.h"
LPCSTR wQueryClientId = "client_id";
LPCSTR wQueryClientSecret = "client_secret";
LPCSTR wQueryGrant = "grant_type";
LPCSTR wQueryGrantType = "client_credentials";
LPCSTR wQueryScope = "scope";
LPCSTR wQueryScopeUrl = "http://api.microsofttranslator.com/";
LPCTSTR wdefaultId = TEXT("MicrosoftTranslator");
LPCTSTR wReqUrl1 = TEXT("datamarket.accesscontrol.windows.net");
LPCTSTR wReqUrl2 = TEXT("/v2/OAuth2-13");
LPCTSTR wReqHeader = TEXT("Content-Type: application/x-www-form-urlencoded");
LPCSTR wJSonAccessToken = "access_token";
LPCSTR wJSonTokenLife = "expires_in";
LPCTSTR wTranslateUrl1 = TEXT("api.microsofttranslator.com");
LPCSTR wTranslateUrl2 = "/v2/Http.svc/Translate?text=%s&from=%2s&to=%2s";
LPCSTR wTranslateHeader = "Content-Type: application/x-www-form-urlencoded\nAuthorization: Bearer ";
WMicrosoftTranslate::WMicrosoftTranslate(LPCTSTR id)
{
// Constructor
ReqBody = 0;
ReqBody2 = 0;
AccessToken = 0;
hIntSession = 0;
TokenLife = 0;
TranslatedDialog = 0;
tick = GetTickCount();
ErrorCode = TRANSLATE_NO_ERROR;
Appid = id ? id : wdefaultId;
}
void WMicrosoftTranslate::setClient(LPCSTR szCid, LPCSTR szCs)
{
// Init variables
len1 = urlEncode(szCid);
len2 = urlEncode(szCs);
if(!len1 || !len2)
ErrorCode = TRANSLATE_ERROR_INVALID_CLIENT;
else
{
// + 1 for Null termination
ClientId = new CHAR[len1 + 1];
ZeroMemory(ClientId, len1 + 1);
ClientSecret = new CHAR[len2 + 1];
ZeroMemory(ClientSecret, len1 + 1);
urlEncode(szCid, ClientId);
urlEncode(szCs, ClientSecret);
}
}
size_t WMicrosoftTranslate::urlEncode(LPCSTR szEsi, LPSTR szEdi, bool force)
{
/*
* urlEncode made by 3735943886
* in : LPCSTR, out : LPSTR
* return : Buffer size
*/
// Counter
size_t esi = 0;
size_t edi = 0;
// Loop
for(;;)
{
if(IsCharAlphaNumericA(szEsi[esi]) && !force)
{
// Safe
if(szEdi)
{
szEdi[edi] = szEsi[esi];
}
edi++;
}
else
{
// Unsafe - Percent Encoding
if(szEdi)
{
StringCbPrintfA(&szEdi[edi], 4, "%%%02x", szEsi[esi] & 0xff);
}
edi += 3;
}
esi++;
// Break, if EOS
if(!szEsi[esi])
break;
}
return edi;
}
// Calculate Query Size
size_t WMicrosoftTranslate::getQueryLen(LPCSTR szQuery, LPCSTR szValue)
{
// + 2 for '&' and '='
return(strlen(szQuery) + strlen(szValue) + 2);
}
void WMicrosoftTranslate::setQuery(LPSTR szQueryUrl, LPCSTR szQuery, LPCSTR szValue)
{
// Set Query to Buffer
// The Buffer must be equal or larger than the calculated size!
size_t BufferSize = strlen(szQueryUrl);
if(BufferSize)
StringCbCatA(szQueryUrl, BufferSize + 2, "&");
// BufferSize should be equal or larger than Real Buffer Size
// + 3 for '&', '=' and null
BufferSize += strlen(szQuery) + strlen(szValue) + 3;
StringCbCatA(szQueryUrl, BufferSize, szQuery);
StringCbCatA(szQueryUrl, BufferSize, "=");
StringCbCatA(szQueryUrl, BufferSize, szValue);
}
void WMicrosoftTranslate::createReqbody1()
{
// Request Body for Access Token
// client_id=[Client ID]&client_secret=[Client Secret]&grant_type=client_credentials&scope=http://api.microsofttranslator.com/
// Calculate the length of Request Body
len1 = getQueryLen(wQueryClientId, ClientId);
len1 += getQueryLen(wQueryClientSecret, ClientSecret);
len1 += getQueryLen(wQueryGrant, wQueryGrantType);
len1 += getQueryLen(wQueryScope, wQueryScopeUrl);
// Create Body
ReqBody = new CHAR[len1];
ZeroMemory(ReqBody, len1);
setQuery(ReqBody, wQueryClientId, ClientId);
setQuery(ReqBody, wQueryClientSecret, ClientSecret);
setQuery(ReqBody, wQueryGrant, wQueryGrantType);
setQuery(ReqBody, wQueryScope, wQueryScopeUrl);
}
LPSTR WMicrosoftTranslate::getReply(HINTERNET hFile)
{
// Allocated memory must be freed after return
const unsigned int FragSize = 1024;
LPSTR szBuffer = new CHAR[FragSize];
LPSTR szEsi = 0;
LPSTR szEdi = 0;
DWORD dwRead = 0;
size_t BufferSize = 0;
while(::InternetReadFile(hFile, szBuffer, FragSize, &dwRead) && dwRead)
{
szEdi = new CHAR [BufferSize + dwRead + 1];
ZeroMemory(szEdi, BufferSize + dwRead + 1);
if(szEsi)
{
MoveMemory(szEdi, szEsi, BufferSize);
delete [] szEsi;
}
szEsi = szEdi;
MoveMemory(&szEdi[BufferSize], szBuffer, dwRead);
BufferSize += dwRead;
dwRead = 0;
}
delete [] szBuffer;
return szEdi;
}
size_t WMicrosoftTranslate::searchMemory(LPCVOID SearchAddress, size_t SearchLength, LPCVOID Pattern, size_t PatternLength, size_t Offset)
{
size_t i, j;
for(i = Offset; i < SearchLength - PatternLength + 1; i++)
{
for(j = 0; j < PatternLength; j++)
{
if(((LPCSTR)SearchAddress)[i + j] != ((LPCSTR)Pattern)[j])
break;
}
if(j == PatternLength)
break;
}
return i;
}
bool WMicrosoftTranslate::getAccessToken()
{
// + 5 is safe margin (5 sec)
if(TokenLife < (GetTickCount() - tick) / 1000 + 5)
{
hIntSession = ::InternetOpen(Appid, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
hHttpSession = ::InternetConnect(hIntSession, wReqUrl1, INTERNET_DEFAULT_HTTPS_PORT, 0, 0, INTERNET_SERVICE_HTTP, 0, 0);
hHttpRequest = ::HttpOpenRequest(hHttpSession, TEXT("POST"), wReqUrl2, HTTP_VERSION, 0, 0, INTERNET_FLAG_SECURE | INTERNET_FLAG_RELOAD, 0);
if(!ReqBody)
createReqbody1();
if(hIntSession && hHttpSession && hHttpRequest)
{
if(::HttpSendRequest(hHttpRequest, wReqHeader, -1, ReqBody, strlen(ReqBody)))
{
Reply = getReply(hHttpRequest);
// + 3 for ":"
len1 = searchMemory(Reply, strlen(Reply), wJSonAccessToken, strlen(wJSonAccessToken)) + strlen(wJSonAccessToken) + 3;
len2 = searchMemory(Reply, strlen(Reply), "\",\"", 3, len1);
// Free old AccessToken
if(AccessToken)
delete [] AccessToken;
AccessTokenLen = len2 - len1;
AccessToken = new CHAR[AccessTokenLen + 1];
ZeroMemory(AccessToken, AccessTokenLen + 1);
CopyMemory(AccessToken, &Reply[len1], AccessTokenLen);
len1 = searchMemory(Reply, strlen(Reply), wJSonTokenLife, strlen(wJSonTokenLife)) + strlen(wJSonTokenLife) + 3;
TokenLife = atoi(&Reply[len1]);
tick = GetTickCount();
// Free Reply
delete [] Reply;
}
else
ErrorCode = TRANSLATE_ERROR_CANNOT_SEND_REQUEST;
}
else
ErrorCode = TRANSLATE_ERROR_CANNOT_INIT_CONNECTION;
::InternetCloseHandle(hHttpRequest);
::InternetCloseHandle(hHttpSession);
::InternetCloseHandle(hIntSession);
return (ErrorCode == TRANSLATE_NO_ERROR);
}
return true;
}
void WMicrosoftTranslate::createReqbody2(LPCWSTR src, LPCSTR f, LPCSTR t)
{
size_t Utf8Size;
size_t WideSize;
LPSTR srcUtf8;
LPSTR srcEncoded;
if(ReqBody2)
delete [] ReqBody2;
StringCchLengthW(src, STRSAFE_MAX_CCH, &WideSize);
Utf8Size = WideCharToMultiByte(CP_UTF8, 0, src, WideSize, NULL, 0, NULL, NULL);
srcUtf8 = new CHAR[Utf8Size + 1];
ZeroMemory(srcUtf8, Utf8Size + 1);
WideCharToMultiByte(CP_UTF8, 0, src, WideSize, srcUtf8, Utf8Size, NULL, NULL);
len1 = urlEncode(srcUtf8, 0, true);
srcEncoded = new CHAR[len1 + 1];
ZeroMemory(srcEncoded, len1 + 1);
urlEncode(srcUtf8, srcEncoded, true);
delete [] srcUtf8;
// - 3 for %s %2s %2s (-8) & from(+2), to(+2), null(+1)
ReqBody2 = new CHAR[strlen(wTranslateUrl2) + len1 - 3];
StringCbPrintfA(ReqBody2, strlen(wTranslateUrl2) + len1 -3, wTranslateUrl2, srcEncoded, f, t);
delete [] srcEncoded;
}
size_t WMicrosoftTranslate::getTranslate(LPCWSTR src, LPCSTR f, LPCSTR t, LPSTR dest)
{
if(TranslatedDialog)
{
if(dest)
{
CopyMemory(dest, TranslatedDialog, TranslatedDialogSize);
dest[TranslatedDialogSize] = 0;
delete [] TranslatedDialog;
TranslatedDialog = 0;
}
len1 = 0;
len2 = TranslatedDialogSize;
}
else if(getAccessToken())
{
createReqbody2(src, f, t);
hIntSession = ::InternetOpen(Appid, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
hHttpSession = ::InternetConnect(hIntSession, wTranslateUrl1, INTERNET_DEFAULT_HTTP_PORT, 0, 0, INTERNET_SERVICE_HTTP, 0, 0);
hHttpRequest = ::HttpOpenRequestA(hHttpSession, "GET", ReqBody2, HTTP_VERSIONA, 0, 0, INTERNET_FLAG_RELOAD, 0);
if(hIntSession && hHttpSession && hHttpRequest)
{
// Size for Request Header
size_t ReqHeaderSize;
ReqHeaderSize = strlen(wTranslateHeader) + AccessTokenLen + 1;
// Alloc memory
LPSTR ReqHeader = new CHAR[ReqHeaderSize];
ZeroMemory(ReqHeader, ReqHeaderSize);
// Create Request Header
StringCbCopyA(ReqHeader, ReqHeaderSize, wTranslateHeader);
StringCbCatA(ReqHeader, ReqHeaderSize, AccessToken);
if(::HttpSendRequestA(hHttpRequest, ReqHeader, -1, 0, 0))
{
Reply = getReply(hHttpRequest);
// Strip Tags
len1 = searchMemory(Reply, strlen(Reply), ">", 1) + 1;
len2 = searchMemory(Reply, strlen(Reply), "<", 1, len1);
if(dest)
{
CopyMemory(dest, &Reply[len1], len2 - len1);
}
else
{
TranslatedDialogSize = len2 - len1;
TranslatedDialog = new CHAR[TranslatedDialogSize + 1];
ZeroMemory(TranslatedDialog, TranslatedDialogSize + 1);
CopyMemory(TranslatedDialog, &Reply[len1], TranslatedDialogSize);
}
delete [] Reply;
}
delete [] ReqHeader;
}
::InternetCloseHandle(hHttpRequest);
::InternetCloseHandle(hHttpSession);
::InternetCloseHandle(hIntSession);
}
else
{
len1 = 0;
len2 = 0;
}
return(len2 - len1);
}
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