Twitter update_profile_image en C#

Question

J'ai de la difficulté à implémenter la méthode [update profile image] de Twitter. Quelqu'un at-il un exemple de code pour transmettre une image en tant que données multiart brutes à l'API Twitter?

J'utilise .NET.

Answer 1

Avez-vous regardé les API Twitter suivants pour .NET?

• Twitterizer
• Yedda Twitter C# Library
• Twitteroo
• TweetSharp

Answer 2

Une bonne bibliothèque pour l'interface Twitter en C# est tweet#. Cela rendrait cela beaucoup plus simple que de le faire directement.

Answer 3

Pris du LINQ2Twitter project et légèrement modifié par souci de concision ..

public static String UpdateAvatar(String filePath) 
    { 
     String avatarUrl= "http://twitter.com/account/update_profile_image.xml"; 
     String file = Path.GetFileName(filePath); 

     string imageType; 

     switch (Path.GetExtension(file).ToLower()) 
     { 
      case ".jpg": 
      case ".jpeg": 
       imageType = "jpg"; 
       break; 
      case ".gif": 
       imageType = "gif"; 
       break; 
      case ".png": 
       imageType = "png"; 
       break; 
      default: 
       throw new ArgumentException(
        "Can't recognize the extension of the file you're uploading. Please choose either a *.gif, *.jpg, *.jpeg, or *.png file.", filePath); 
     } 

     string contentBoundaryBase = DateTime.Now.Ticks.ToString("x"); 
     string beginContentBoundary = string.Format("--{0}\r\n", contentBoundaryBase); 
     var contentDisposition = string.Format("Content-Disposition:form-data); name=\"image\"); filename=\"{0}\"\r\nContent-Type: image/{1}\r\n\r\n", file, imageType); 
     var endContentBoundary = string.Format("\r\n--{0}--\r\n", contentBoundaryBase); 

     var formDataSB = new StringBuilder(); 

     byte[] fileBytes = null; 
     string fileByteString = null; 
     Encoding encoding = Encoding.GetEncoding("iso-8859-1"); 

     using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read)) 
     { 
      byte[] buffer = new byte[4096]; 
      var memStr = new MemoryStream(); 
      memStr.Position = 0; 
      int bytesRead = 0; 

      while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) 
      { 
       memStr.Write(buffer, 0, bytesRead); 
      } 

      memStr.Position = 0; 
      fileByteString = encoding.GetString(memStr.GetBuffer()); 
     } 

     fileBytes = 
      encoding.GetBytes(
       formDataSB.ToString() + 
       beginContentBoundary + 
       contentDisposition + 
       fileByteString + 
       endContentBoundary); 

     var req = (HttpWebRequest)WebRequest.Create(AvatarUpdateURL); 
     req.ServicePoint.Expect100Continue = false; 
     req.ContentType = "multipart/form-data;boundary=" + contentBoundaryBase; 
     req.PreAuthenticate = true; 
     req.AllowWriteStreamBuffering = true; 
     req.Method = "POST"; 
     req.ContentLength = fileBytes.Length; 
     req.Credentials = new NetworkCredential(Username, Password); 

     string responseXml = null; 

     using (var reqStream = req.GetRequestStream()) 
     { 
      reqStream.Write(fileBytes, 0, fileBytes.Length); 
      reqStream.Flush(); 
     } 

     string httpStatus = string.Empty; 
     WebResponse resp = null; 

     try 
     { 
      resp = req.GetResponse(); 

      httpStatus = resp.Headers["Status"]; 

      using (var respStream = resp.GetResponseStream()) 
      using (var respRdr = new StreamReader(respStream)) 
      { 
       responseXml = respRdr.ReadToEnd(); 
      } 
     } 
     catch (WebException wex) 
     { 
      //do something 
     } 
     finally 
     { 
      if (resp != null) 
      { 
       resp.Close(); 
      } 
     } 
     return responseXml.ToString(); 

    }