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TransformTextMethod.cs
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using System;
using System.Text;
using System.Net;
using System.IO;
//Requires System.Runtime.Serialization assembly to be referenced
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization;
//Requires System.Web assembly to be referenced
using System.Web;
using System.Media;
using System.Threading;
namespace MicrosoftTranslatorSdk.HttpSamples
{
class Program
{
static void Main(string[] args)
{
AdmAccessToken admToken;
string headerValue;
//Get Client Id and Client Secret from https://datamarket.azure.com/developer/applications/
//Refer obtaining AccessToken (http://msdn.microsoft.com/en-us/library/hh454950.aspx)
AdmAuthentication admAuth = new AdmAuthentication("clientID", "client secret");
try
{
admToken = admAuth.GetAccessToken();
// Create a header with the access_token property of the returned token
headerValue = "Bearer " + admToken.access_token;
TransformTextMethod(headerValue);
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
catch (WebException e)
{
ProcessWebException(e);
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
}
}
private static void TransformTextMethod(string authToken)
{
Console.WriteLine("Enter Text to transform: (e.g Dis is 2 strange i juss wanna go home sooooooon)");
string textToTransform = Console.ReadLine();
string language = "en";
string domain = "general";
//Keep appId parameter blank as we are sending access token in authorization header.
string url = string.Format("http://api.microsofttranslator.com/V3/json/TransformText?sentence={0}&category={1}&language={2}",textToTransform,domain,language); ;
TransformTextResponse transformTextResponse= new TransformTextResponse();
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Headers.Add("Authorization", authToken);
using (WebResponse response = httpWebRequest.GetResponse())
{
using( StreamReader sr = new StreamReader(response.GetResponseStream()))
{
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(sr.ReadToEnd())))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(TransformTextResponse));
//Get deserialized TransformTextResponse object from JSON stream
transformTextResponse = (TransformTextResponse)serializer.ReadObject(ms);
Console.WriteLine("Transformed sentence: {0}", transformTextResponse.sentence);
}
}
}
}
private static void ProcessWebException(WebException e)
{
Console.WriteLine("{0}", e.ToString());
// Obtain detailed error information
string strResponse = string.Empty;
using (HttpWebResponse response = (HttpWebResponse)e.Response)
{
using (Stream responseStream = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(responseStream, System.Text.Encoding.ASCII))
{
strResponse = sr.ReadToEnd();
}
}
}
Console.WriteLine("Http status code={0}, error message={1}", e.Status, strResponse);
}
}
[DataContract]
public class TransformTextResponse
{
[DataMember]
public int ec { get; set; }
[DataMember]
public string em { get; set; }
[DataMember]
public string sentence { get; set; }
}
[DataContract]
public class AdmAccessToken
{
[DataMember]
public string access_token { get; set; }
[DataMember]
public string token_type { get; set; }
[DataMember]
public string expires_in { get; set; }
[DataMember]
public string scope { get; set; }
}
public class AdmAuthentication
{
public static readonly string DatamarketAccessUri = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13";
private string clientId;
private string clientSecret;
private string request;
private AdmAccessToken token;
private Timer accessTokenRenewer;
//Access token expires every 10 minutes. Renew it every 9 minutes only.
private const int RefreshTokenDuration = 9;
public AdmAuthentication(string clientId, string clientSecret)
{
this.clientId = clientId;
this.clientSecret = clientSecret;
//If clientid or client secret has special characters, encode before sending request
this.request = string.Format("grant_type=client_credentials&client_id={0}&client_secret={1}&scope=http://api.microsofttranslator.com", HttpUtility.UrlEncode(clientId), HttpUtility.UrlEncode(clientSecret));
this.token = HttpPost(DatamarketAccessUri, this.request);
//renew the token every specfied minutes
accessTokenRenewer = new Timer(new TimerCallback(OnTokenExpiredCallback), this, TimeSpan.FromMinutes(RefreshTokenDuration), TimeSpan.FromMilliseconds(-1));
}
public AdmAccessToken GetAccessToken()
{
return this.token;
}
private void RenewAccessToken()
{
AdmAccessToken newAccessToken = HttpPost(DatamarketAccessUri, this.request);
this.token = newAccessToken;
Console.WriteLine(string.Format("Renewed token for user: {0} is: {1}", this.clientId, this.token.access_token));
}
private void OnTokenExpiredCallback(object stateInfo)
{
try
{
RenewAccessToken();
}
catch (Exception ex)
{
Console.WriteLine(string.Format("Failed renewing access token. Details: {0}", ex.Message));
}
finally
{
try
{
accessTokenRenewer.Change(TimeSpan.FromMinutes(RefreshTokenDuration), TimeSpan.FromMilliseconds(-1));
}
catch (Exception ex)
{
Console.WriteLine(string.Format("Failed to reschedule the timer to renew access token. Details: {0}", ex.Message));
}
}
}
private AdmAccessToken HttpPost(string DatamarketAccessUri, string requestDetails)
{
//Prepare OAuth request
WebRequest webRequest = WebRequest.Create(DatamarketAccessUri);
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.Method = "POST";
byte[] bytes = Encoding.ASCII.GetBytes(requestDetails);
webRequest.ContentLength = bytes.Length;
using (Stream outputStream = webRequest.GetRequestStream())
{
outputStream.Write(bytes, 0, bytes.Length);
}
using (WebResponse webResponse = webRequest.GetResponse())
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(AdmAccessToken));
//Get deserialized object from JSON stream
AdmAccessToken token = (AdmAccessToken)serializer.ReadObject(webResponse.GetResponseStream());
return token;
}
}
}
}