sdk/samples/WCFSamples/TechnologySamples/Extensibility/Web/PushStyleStreaming/CS/ImageGenerationService.cs

   1 //  Copyright (c) Microsoft Corporation. All rights reserved.
   2
   3 using System.Drawing;
   4 using System.Drawing.Imaging;
   5 using System.IO;
   6 using System.ServiceModel;
   7 using System.ServiceModel.Channels;
   8 using System.ServiceModel.Web;
   9
  10 namespace Microsoft.WebProgrammingModel.Samples
  11 {
  12     [ServiceContract]
  13     public class ImageGenerationService
  14     {
  15
  16         [OperationContract]
  17         [WebGet(UriTemplate = "images")]
  18         public Message GetDynamicImage()
  19         {
  20             string text = WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters["text"];
  21
  22             Bitmap theBitmap = GenerateImage(text);
  23
  24             Message response = StreamMessageHelper.CreateMessage(MessageVersion.None, "", "image/jpeg",
  25                 delegate(Stream outputStream)
  26                 {
  27                     theBitmap.Save(outputStream, ImageFormat.Jpeg);
  28                 });
  29
  30             return response;
  31         }
  32
  33         [OperationContract]
  34         [WebGet(UriTemplate = "text")]
  35         public Message GetDynamicText()
  36         {
  37             string text = WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters["text"];
  38             Message response = StreamMessageHelper.CreateMessage(MessageVersion.None, "", "text/plain",
  39
  40                 delegate(Stream s)
  41                 {
  42                     TextWriter writer = new StreamWriter(s);
  43
  44                     writer.WriteLine("You said: ");
  45                     writer.WriteLine(text);
  46                     writer.WriteLine("Didn't you?");
  47                     writer.Flush();
  48                 });
  49
  50             return response;
  51         }
  52
  53         private Bitmap GenerateImage(string text)
  54         {
  55             Bitmap bitmap = new Bitmap(468, 60);
  56
  57             Graphics g = Graphics.FromImage(bitmap);
  58             Brush brush = new SolidBrush(Color.Indigo);
  59
  60             g.FillRectangle(brush, 0, 0, 468, 60);
  61
  62             brush = new SolidBrush(Color.WhiteSmoke);
  63             g.DrawString(text, new Font("Consolas", 13), brush, new PointF(5, 5));
  64
  65             return bitmap;
  66         }
  67     }
  68 }