public override async Task <string> ProcessData(DbUserContent uc, Stream input, Stream output)
{
Image <Rgba32> image;
//Open this as an image
try
{
image = Image <Rgba32> .Load <Rgba32>(input);
} catch
{
return("Error opening the image!");
}
//Now, we'll apply transformations
if (settings.do_resize)
{
image.Mutate(x => x.Resize(settings.resize_x, settings.resize_y));
}
//Now, we'll write to the output and set values
image.SaveAsPng(output);
uc.size = (int)output.Length;
uc.type = "image/png";
return(null);
}
public static async Task OnHttpRequest(Microsoft.AspNetCore.Http.HttpContext e)
{
//Get the file data
DbUserContent uc = await Program.conn.GetUserContentByName(e.Request.Path.ToString().Split('/')[2]);
if (uc == null)
{
e.Response.StatusCode = 404;
await Program.WriteStringToStreamAsync(e.Response.Body, "Not Found");
return;
}
//Set headers
e.Response.ContentLength = uc.size;
e.Response.ContentType = uc.type;
e.Response.Headers.Add("X-Uploader-ID", uc.uploader.ToString());
e.Response.Headers.Add("X-Uploader-Node", uc.node_name);
e.Response.Headers.Add("Date", uc.upload_time.ToUniversalTime().ToString("r"));
//If we requested a download, set the content type
if (e.Request.Query["download"] == "true")
{
e.Response.ContentType = "application/octet-strean";
}
//Open file stream and copy
using (FileStream fs = new FileStream(Program.config.content_path + uc.name, FileMode.Open, FileAccess.Read))
await fs.CopyToAsync(e.Response.Body);
}
/// <summary> /// Processes the data. /// </summary> /// <param name="uc">File info</param> /// <param name="input">Input stream</param> /// <param name="output">Output stream</param> /// <returns>Not null if there was an error</returns> public abstract Task <string> ProcessData(DbUserContent uc, Stream input, Stream output);
public static async Task OnHttpRequest(Microsoft.AspNetCore.Http.HttpContext e)
{
//Authenticate the user
DbUser user = await Program.conn.AuthenticateUserToken(e.Request.Headers["Authorization"].ToString().Substring("Bearer ".Length));
if (user == null)
{
e.Response.StatusCode = 401;
await Program.WriteStringToStreamAsync(e.Response.Body, "Not Authenticated");
return;
}
//Make sure that the content length is within range
if (!e.Request.ContentLength.HasValue)
{
e.Response.StatusCode = 411;
await Program.WriteStringToStreamAsync(e.Response.Body, "Content-Type Header is Required");
return;
}
if (e.Request.ContentLength.Value > Program.config.max_filesize)
{
e.Response.StatusCode = 413;
await Program.WriteStringToStreamAsync(e.Response.Body, "File Too Large");
return;
}
//Get the application
BaseAdapter adapter;
string application_id = e.Request.Query["application_id"];
if (Program.applications.ContainsKey(application_id))
{
adapter = Program.applications[application_id];
}
else
{
e.Response.StatusCode = 400;
await Program.WriteStringToStreamAsync(e.Response.Body, "Invalid Application ID");
return;
}
//Generate a filename to use
string name = LibDeltaSystem.Tools.SecureStringTool.GenerateSecureString(24);
while (File.Exists(Program.config.content_path + name))
{
name = LibDeltaSystem.Tools.SecureStringTool.GenerateSecureString(24);
}
//Create a random token to use
string token = LibDeltaSystem.Tools.SecureStringTool.GenerateSecureString(48);
while (await Program.conn.GetUserContentByToken(token) != null)
{
token = LibDeltaSystem.Tools.SecureStringTool.GenerateSecureString(48);
}
//Create a DB entry
DbUserContent uc = new DbUserContent
{
node_name = Program.config.node_name,
size = (int)e.Request.ContentLength.Value,
token = token,
type = e.Request.ContentType,
uploader = user._id,
upload_time = DateTime.UtcNow,
url = Program.config.content_url + name,
name = name,
_id = ObjectId.GenerateNewId(),
application_id = application_id
};
//Create a file to write to
using (FileStream fs = new FileStream(Program.config.content_path + name, FileMode.Create))
using (MemoryStream ms = new MemoryStream())
{
//Copy to stream
byte[] buffer = new byte[BUFFER_SIZE];
int remaining = (int)e.Request.ContentLength.Value;
while (remaining > 0)
{
int read = await e.Request.Body.ReadAsync(buffer, 0, BUFFER_SIZE);
await ms.WriteAsync(buffer, 0, read);
remaining -= read;
}
//Process
ms.Position = 0;
await adapter.ProcessData(uc, ms, fs);
}
//Insert
await Program.conn.system_user_uploads.InsertOneAsync(uc);
//Write data
e.Response.ContentType = "application/json";
await Program.WriteStringToStreamAsync(e.Response.Body, JsonConvert.SerializeObject(uc, Formatting.Indented));
}
public static async Task OnCanvasRequest(Microsoft.AspNetCore.Http.HttpContext e, DbServer s, DbUser u, int tribe_id, string next)
{
//Find canvas
if (!ObjectId.TryParse(next, out ObjectId id))
{
throw new StandardError("Canvas Not Found", StandardErrorCode.NotFound);
}
DbCanvas c = await Program.connection.LoadCanvasData(id);
if (c == null)
{
throw new StandardError("Canvas Not Found", StandardErrorCode.NotFound);
}
//Get request method
var method = Program.FindRequestMethod(e);
//Act from the method
if (method == RequestHttpMethod.get)
{
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.post)
{
//Check scope
await Program.CheckTokenScope(u, null);
//Rename the canvas; decode request
CanvasCreateRequest request = Program.DecodePostBody <CanvasCreateRequest>(e);
//Set
await c.RenameCanvas(Program.connection, request.name, request.color);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Modify);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.delete)
{
//Check scope
await Program.CheckTokenScope(u, null);
//Delete canvas
await c.DeleteCanvas(Program.connection);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Delete);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else if (method == RequestHttpMethod.put)
{
//Check scope
await Program.CheckTokenScope(u, null);
//We'll update the thumbnail; Decode the request
UpdateThumbnailRequest request = Program.DecodePostBody <UpdateThumbnailRequest>(e);
//Try to find
DbUserContent uc = await Program.connection.GetUserContentByToken(request.token);
if (uc == null)
{
throw new StandardError("Token Not Valid", StandardErrorCode.InvalidInput);
}
if (uc.application_id != CANVAS_THUMBNAIL_APPLICATION_ID)
{
throw new StandardError("Specified User Content Application ID Mismatch", StandardErrorCode.InvalidInput);
}
//Update
await c.SetNewThumbnail(Program.connection, uc);
//Send RPC message
SendRPCMessage(c, s, u, tribe_id, RPCPayloadModifyCanvas.RPCPayloadModifyCanvas_CanvasChange.Modify);
//Write response
await Program.QuickWriteJsonToDoc(e, ConvertCanvas(c));
}
else
{
throw new StandardError("Unexpected method.", StandardErrorCode.BadMethod);
}
}
