148 lines
3.9 KiB
C#
148 lines
3.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Threading;
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using Ooui;
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namespace Samples
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{
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public class FilesSample : ISample
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{
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public string Title => "Upload files";
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public string Path => "/files";
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public void Publish ()
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{
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var app = CreateElement ();
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UI.Publish (Path, app);
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UI.PublishCustomResponse ("/files/upload", HandleUpload);
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}
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void HandleUpload (HttpListenerContext listenerContext, CancellationToken token)
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{
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var req = listenerContext.Request;
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var ct = req.ContentType;
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var bi = ct.IndexOf ("boundary=", StringComparison.InvariantCulture);
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var boundaryString = ct.Substring (bi + 9);
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var boundaryBytes = System.Text.Encoding.UTF8.GetBytes ("--" + boundaryString + "\r\n");
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var boundaryEndBytes = System.Text.Encoding.UTF8.GetBytes (boundaryString + "--");
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var headerEndBytes = System.Text.Encoding.UTF8.GetBytes ("\r\n\r\n");
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Console.WriteLine ("OMGGGGGG " + boundaryString);
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var state = 0;
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var buffer = new byte[1024];
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var bufferLen = 0;
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var needsRead = true;
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using (var s = req.InputStream) {
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while (state < 1000) {
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if (needsRead) {
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var r = buffer.Length - bufferLen;
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if (r <= 0) {
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Array.Resize (ref buffer, buffer.Length * 2);
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r = buffer.Length - bufferLen;
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}
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var n = s.Read (buffer, bufferLen, r);
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if (n > 0) {
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bufferLen += n;
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}
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else if (n == 0) {
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// End!
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state = 1000;
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}
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else {
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state = 1001;
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}
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}
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switch (state) {
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case 0:
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var i = FindIndex (buffer, 0, bufferLen, boundaryBytes);
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if (i >= 0) {
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var e = i + boundaryBytes.Length;
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var r = bufferLen - e;
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Buffer.BlockCopy (buffer, e, buffer, 0, r);
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bufferLen = r;
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state = 1;
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}
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else {
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needsRead = true;
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}
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break;
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case 1:
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i = FindIndex (buffer, 0, bufferLen, headerEndBytes);
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if (i >= 0) {
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var h = System.Text.Encoding.ASCII.GetString (buffer, 0, i);
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Console.WriteLine ("HEADERS {0}", h);
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var e = i + headerEndBytes.Length;
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var r = bufferLen - e;
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Buffer.BlockCopy (buffer, e, buffer, 0, r);
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bufferLen = r;
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state = 2;
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}
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else {
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needsRead = true;
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}
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break;
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case 2:
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i = FindIndex (buffer, 0, bufferLen, boundaryEndBytes);
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if (i >= 0) {
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Console.WriteLine ("DATA {0}", bufferLen);
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var data = new byte[bufferLen];
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var e = i + boundaryBytes.Length;
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var r = bufferLen - e;
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Buffer.BlockCopy (buffer, e, buffer, 0, r);
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bufferLen = r;
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state = 0;
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}
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else {
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needsRead = true;
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}
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break;
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}
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}
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}
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Console.WriteLine ("STATE " + state);
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listenerContext.Response.StatusCode = 200;
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listenerContext.Response.Close ();
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}
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static int FindIndex (byte[] buffer, int bufferStart, int bufferLen, byte[] pattern)
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{
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var n = pattern.Length;
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for (var i = bufferLen - n; i >= bufferStart; i--) {
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var all = true;
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for (var j = 0; all && j < n; j++) {
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all = buffer[i + j] == pattern[j];
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}
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if (all)
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return i;
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}
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return -1;
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}
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public Element CreateElement ()
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{
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var heading = new Heading ("Upload Files");
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var subtitle = new Paragraph ("Upload files to the app");
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var uploadForm = new Form ();
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uploadForm.Action = "/files/upload";
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uploadForm.Method = "POST";
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uploadForm.EncodingType = "multipart/form-data";
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uploadForm.AppendChild (new Input (InputType.File) { Name = "file" });
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uploadForm.AppendChild (new Input (InputType.Submit) { Value = "Upload" });
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var app = new Div ();
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app.AppendChild (heading);
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app.AppendChild (subtitle);
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app.AppendChild (uploadForm);
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return app;
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}
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}
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}
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