public HTTPResponse GetResponse(HTTPRequest request)
{
HTTPResponse response = new HTTPResponse(200);
StringBuilder sb = new StringBuilder();
string session = request.GetRequestByKey("session");
string action = request.GetRequestByKey("action");
if (action != null)
{
action = action.ToLower();
}
string username = request.GetRequestByKey("username");
string password = request.GetRequestByKey("password");
string following = request.GetRequestByKey("following");
string message = request.GetRequestByKey("message");
if (session == null) // no session? show login screen
{
if (action == null)
{
sb.Append("<h1>Twitter</h1>");
sb = GenLoginPage(sb);
}
else
{
if (action.Equals("newuser"))
{
if (username != null && password != null && username != "" && password != "")
{
try
{
Twitter.AddUser(username, password);
sb.Append("User added successfully, please go back to <a href=\"/twitter\">login page</a> to login");
}
catch (Exception ex)
{
sb.Append(String.Format("Error adding user with error [{0}], please go back to <a href=\"/twitter\">login page</a> to try again", ex.Message));
}
}
}
else if (action.Equals("login"))
{
if (username != null && password != null && username != "" && password != "")
{
if (Twitter.IsValidUser(username, password))
{
string newSession = Twitter.GenSession(username);
if (newSession != null)
{
response.Status = 301;
response.AddCustomHeader("Location", "/twitter?session=" + newSession);
return(response);
}
response.Status = 500;
return(response);
}
else
{
sb.Append("Error login, please go back to <a href=\"/twitter\">login page</a> to try again");
}
}
}
}
}
else // session is not null
{
User user = Twitter.GetUserFromSession(session);
if (user == null)
{
response.Status = 404;
return(response);
}
Twitter twitter = new Twitter(user.Name);
if (action == null) // No action? go to homepage
{
try
{
sb.Append(String.Format("<h1>{0}'s Twitter</h1>", user.Name));
sb = GenTimeline(twitter, sb);
}
catch (Exception ex)
{
sb.Append(String.Format("Error [{0}], please go back to <a href=\"/twitter\">login page</a> to try again", ex.Message));
}
}
else //action is not null
{
sb.Append(String.Format("<h1>{0}'s Twitter</h1>", user.Name));
if (action.Equals("following"))
{
try
{
twitter.AddFollowing(following);
sb = GenTimeline(twitter, sb);
}
catch (Exception ex)
{
sb.Append(String.Format("Error [{0}], please go back to <a href=\"/twitter\">login page</a> to try again", ex.Message));
}
}
else if (action.Equals("tweet"))
{
try
{
twitter.PostTweet(message);
sb = GenTimeline(twitter, sb);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
sb.Append(String.Format("Error [{0}], please go back to <a href=\"/twitter\">login page</a> to try again", ex.Message));
}
}
}
}
response.Body = Encoding.UTF8.GetBytes(sb.ToString());
return(response);
}
public HTTPResponse GetResponse(HTTPRequest request)
{
HTTPResponse response = new HTTPResponse(200);
StringBuilder sb = new StringBuilder();
ErrorCode error;
if (!_isInit)
{
init();
_isInit = true;
}
if (request.Method == HTTPRequest.METHOD_GET)
{
// Input form, this can be place by any HTML page
sb.Append("<html><body>");
sb.Append(GenUploadForm());
sb.Append("</body></html>");
response.Body = Encoding.UTF8.GetBytes(sb.ToString());
return(response);
}
else if (request.Method == HTTPRequest.METHOD_POST)
{
// Get remote image from URL
string url = Uri.UnescapeDataString(request.GetRequestByKey("imageUploadUrl"));
byte[] data;
try {
data = DownloadImageFromUrl(url);
} catch (Exception) {
return(new HTTPResponse(400));
}
// https://www.codeproject.com/Articles/502829/GPGPU-image-processing-basics-using-OpenCL-NET
// Convert image to bitmap binary
Image inputImage = Image.FromStream(new MemoryStream(data));
if (inputImage == null)
{
return(new HTTPResponse(500));
}
int imagewidth = inputImage.Width;
int imageHeight = inputImage.Height;
Bitmap bmpImage = new Bitmap(inputImage);
BitmapData bitmapData = bmpImage.LockBits(new Rectangle(0, 0, bmpImage.Width, bmpImage.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
int inputImageByteSize = bitmapData.Stride * bitmapData.Height;
byte[] inputByteArray = new byte[inputImageByteSize];
Marshal.Copy(bitmapData.Scan0, inputByteArray, 0, inputImageByteSize);
// Load kernel source code
string programPath = System.Environment.CurrentDirectory + "/Kernel.cl";
if (!System.IO.File.Exists(programPath))
{
return(new HTTPResponse(404));
}
string programSource = System.IO.File.ReadAllText(programPath);
using (OpenCL.Net.Program program = Cl.CreateProgramWithSource(_context, 1, new[] { programSource }, null, out error)) {
// Create kernel
LogError(error, "Cl.CreateProgramWithSource");
error = Cl.BuildProgram(program, 1, new[] { _device }, string.Empty, null, IntPtr.Zero);
LogError(error, "Cl.BuildProgram");
if (Cl.GetProgramBuildInfo(program, _device, ProgramBuildInfo.Status, out error).CastTo <OpenCL.Net.BuildStatus>()
!= BuildStatus.Success)
{
LogError(error, "Cl.GetProgramBuildInfo");
return(new HTTPResponse(404));
}
Kernel kernel = Cl.CreateKernel(program, _parameters["KernelFunction"], out error);
LogError(error, "Cl.CreateKernel");
// Create image memory objects
OpenCL.Net.ImageFormat clImageFormat = new OpenCL.Net.ImageFormat(ChannelOrder.RGBA, ChannelType.Unsigned_Int8);
IMem inputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.ReadOnly,
clImageFormat, (IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, inputByteArray, out error);
LogError(error, "CreateImage2D input");
byte[] outputByteArray = new byte[inputImageByteSize];
IMem outputImage2DBuffer = Cl.CreateImage2D(_context, MemFlags.CopyHostPtr | MemFlags.WriteOnly,
clImageFormat, (IntPtr)bitmapData.Width, (IntPtr)bitmapData.Height,
(IntPtr)0, outputByteArray, out error);
LogError(error, "CreateImage2D output");
// Set arguments
int IntPtrSize = Marshal.SizeOf(typeof(IntPtr));
error = Cl.SetKernelArg(kernel, 0, (IntPtr)IntPtrSize, inputImage2DBuffer);
error |= Cl.SetKernelArg(kernel, 1, (IntPtr)IntPtrSize, outputImage2DBuffer);
LogError(error, "Cl.SetKernelArg");
// Create command queue
CommandQueue cmdQueue = Cl.CreateCommandQueue(_context, _device, (CommandQueueProperties)0, out error);
LogError(error, "Cl.CreateCommandQueue");
Event clevent;
// Copy input image from the host to the GPU
IntPtr[] originPtr = new IntPtr[] { (IntPtr)0, (IntPtr)0, (IntPtr)0 };
IntPtr[] regionPtr = new IntPtr[] { (IntPtr)imagewidth, (IntPtr)imageHeight, (IntPtr)1 };
IntPtr[] workGroupSizePtr = new IntPtr[] { (IntPtr)imagewidth, (IntPtr)imageHeight, (IntPtr)1 };
error = Cl.EnqueueWriteImage(cmdQueue, inputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0,
(IntPtr)0, inputByteArray, 0, null, out clevent);
LogError(error, "Cl.EnqueueWriteImage");
// Run the kernel
error = Cl.EnqueueNDRangeKernel(cmdQueue, kernel, 2, null, workGroupSizePtr, null, 0, null, out clevent);
LogError(error, "Cl.EnqueueNDRangeKernel");
// Wait for finish event
error = Cl.Finish(cmdQueue);
LogError(error, "Cl.Finish");
// Read the output image back from GPU
error = Cl.EnqueueReadImage(cmdQueue, outputImage2DBuffer, Bool.True, originPtr, regionPtr, (IntPtr)0,
(IntPtr)0, outputByteArray, 0, null, out clevent);
LogError(error, "Cl.EnqueueReadImage");
error = Cl.Finish(cmdQueue);
LogError(error, "Cl.Finih");
// Release memory
Cl.ReleaseKernel(kernel);
Cl.ReleaseCommandQueue(cmdQueue);
Cl.ReleaseMemObject(inputImage2DBuffer);
Cl.ReleaseMemObject(outputImage2DBuffer);
// Convert binary bitmap to JPEG image and return as response
GCHandle pinnedOutputArray = GCHandle.Alloc(outputByteArray, GCHandleType.Pinned);
IntPtr outputBmpPointer = pinnedOutputArray.AddrOfPinnedObject();
Bitmap outputBitmap = new Bitmap(imagewidth, imageHeight, bitmapData.Stride, PixelFormat.Format32bppArgb, outputBmpPointer);
MemoryStream msOutput = new MemoryStream();
outputBitmap.Save(msOutput, System.Drawing.Imaging.ImageFormat.Jpeg);
response.Body = msOutput.ToArray();
response.Type = "image/jpeg";
return(response);
}
}
return(new HTTPResponse(501));
}
public new HTTPResponse GetResponse(HTTPRequest request)
{
HTTPResponse response = new HTTPResponse(200);
StringBuilder sb = new StringBuilder();
session = request.GetPropertyByKey("X-session");
string[] urlToken = request.Url.Split("/");
if (urlToken.Length > 2)
{
action = urlToken[2];
}
else
{
action = null;
}
requestMethod = request.Method;
string username = request.GetRequestByKey("username");
string password = request.GetRequestByKey("password");
if (IsMethod(HTTP_OPTIONS))
{
return(response);
}
if (IsAction(USER_ACTION))
{
if (IsMethod(HTTP_POST))
{
if (!IsNOE(username) && !IsNOE(password))
{
try
{
Twitter.AddUser(username, password);
response.Status = 201;
}
catch (Exception ex)
{
response.SetBody(ex.Message);
response.Status = 500;
}
}
else
{
response.SetBody("Username and password required");
response.Status = 400;
return(response);
}
}
}
else if (IsAction(LOGIN_ACTION))
{
if (IsMethod(HTTP_POST))
{
if (!IsNOE(username) && !IsNOE(password))
{
if (Twitter.IsValidUser(username, password))
{
string newSession = Twitter.GenSession(username);
if (!IsNOE(newSession))
{
response.Status = 201;
dynamic jobj = new JObject();
jobj.Session = newSession;
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(jobj);
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
response.SetBody("Can't create session");
response.Status = 500;
return(response);
}
else
{
response.SetBody("Invalid username/password");
response.Status = 404;
return(response);
}
}
else
{
response.SetBody("Username and password required");
response.Status = 400;
return(response);
}
}
}
else if (!IsNOE(session))
{
User user = Twitter.GetUserFromSession(session);
if (user == null)
{
response.SetBody("User not found, please login again");
response.Status = 404;
return(response);
}
Twitter twitter = new Twitter(user.Name);
if (IsNOE(action))
{
if (IsMethod(HTTP_GET))
{
try
{
response = new HTTPResponse(200);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(twitter.GetFollowingTimeline());
if (IsNOE(resp))
{
response.SetBody("No post in timline");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.SetBody(ex.Message);
response.Status = 500;
return(response);
}
}
}
else if (IsAction(LOGOUT_ACTION))
{
if (IsMethod(HTTP_POST))
{
try {
Twitter.RemoveSession(user.Name);
response.Status = 200;
return(response);
}
catch (Exception ex)
{
response.SetBody(ex.Message);
response.Status = 500;
return(response);
}
}
}
else if (IsAction(TWEET_ACTION))
{
if (IsMethod(HTTP_GET))
{
try
{
response = new HTTPResponse(200);
response.Type = "application/json";
string resp = null;
if (IsNOE(urlToken[3]))
{
resp = JsonConvert.SerializeObject(twitter.GetTimeline(user));
}
else
{
User aUser = Twitter.GetUserFromName(urlToken[3]);
if (aUser == null)
{
response.SetBody("User not found");
response.Status = 404;
return(response);
}
resp = JsonConvert.SerializeObject(twitter.GetTimeline(aUser));
}
if (IsNOE(resp))
{
response.SetBody("No post in timline");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.SetBody(ex.Message);
response.Status = 500;
return(response);
}
}
else if (IsMethod(HTTP_POST))
{
try
{
string message = request.GetRequestByKey("message");
if (IsNOE(message))
{
response.SetBody("Message required");
response.Status = 400;
return(response);
}
Tweet tweet = new Tweet();
tweet.User = user.Name;
tweet.Message = message;
tweet.DateCreated = DateTime.Now;
using (var context = new TweetContext())
{
context.Tweets.Add(tweet);
context.SaveChanges();
}
response.Status = 201;
return(response);
}
catch (Exception ex)
{
response.SetBody(ex.Message);
response.Status = 500;
return(response);
}
}
else if (IsMethod(HTTP_DELETE))
{
try {
throw (new NotImplementedException());
} catch (Exception ex) {
response.SetBody(ex.Message);
response.Status = 501;
return(response);
}
}
}
//action following
else if (IsAction(FOLLOWING_ACTION))
{
if (IsMethod(HTTP_GET))
{
response = new HTTPResponse(200);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(user.Following);
if (resp == null)
{
response.SetBody("No following");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
//add new following
else if (IsMethod(HTTP_POST))
{
string following = request.GetRequestByKey("followingname");
try
{
twitter.AddFollowing(following);
response = new HTTPResponse(201);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(user.Following);
if (resp == null)
{
response.SetBody("No folowing");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.Status = 400;
response.SetBody(ex.Message);
return(response);
}
}
else if (IsMethod(HTTP_DELETE))
{
string following = request.GetRequestByKey("followingname");
try
{
twitter.RemoveFollowing(following);
response = new HTTPResponse(200);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(user.Following);
if (resp == null)
{
response.SetBody("No following");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.Status = 400;
response.SetBody(ex.Message);
return(response);
}
}
}
//add follow
else if (IsAction(FOLLOW_ACTION))
{
if (IsMethod(HTTP_POST))
{
string following = request.GetRequestByKey("followingname");
try
{
twitter.AddFollowing(following);
response = new HTTPResponse(201);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(user.Following);
if (resp == null)
{
response.SetBody("No folowing");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.Status = 400;
response.SetBody(ex.Message);
return(response);
}
}
}
//unfollow
else if (IsAction(UNFOLLOW_ACTION))
{
if (IsMethod(HTTP_DELETE))
{
try
{
twitter.RemoveFollowing(following);
response = new HTTPResponse(200);
response.Type = "application/json";
string resp = JsonConvert.SerializeObject(user.Following);
if (resp == null)
{
response.SetBody("No following");
response.Status = 404;
return(response);
}
response.Body = Encoding.UTF8.GetBytes(resp);
return(response);
}
catch (Exception ex)
{
response.Status = 400;
response.SetBody(ex.Message);
return(response);
}
}
}
}
response.Status = 400;
return(response);
}