C#根据微软的WebService实现Text To Speech，根据代码可是抛出异常，请斑竹能否帮我一起解决这个问题感谢；
参考网址：
http://msdn.microsoft.com/en-us/library/ff512420.aspx
http://msdn.microsoft.com/en-us/library/hh454950.aspx
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("texttospeechjackslater", "OIOa3tzD0h7SWiWN7qz23nzuf+rpaqCj8HAh0Uyg6Fo=");
try
{
admToken = admAuth.GetAccessToken();
// Create a header with the access_token property of the returned token
headerValue = "Bearer " + admToken.access_token;
SpeakMethod(headerValue);
}
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);
}
Console.Read();
}
private static void SpeakMethod(string authToken)
{
string uri = "http://api.microsofttranslator.com/v2/Http.svc/Speak?text=welcome&language=en&format=" + HttpUtility.UrlEncode("audio/wav") + "&options=MaxQuality";
WebRequest webRequest = WebRequest.Create(uri);
webRequest.Headers.Add("Authorization", authToken);
WebResponse response = null;
try
{
response = webRequest.GetResponse();
using (Stream stream = response.GetResponseStream())
{
using (SoundPlayer player = new SoundPlayer(stream))
{
player.PlaySync();
}
}
}
catch
{
throw;
}
finally
{
if (response != null)
{
response.Close();
response = null;
}
}
}
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 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);
//swap the new token with old one
//Note: the swap is thread unsafe
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;
}
}
}
