initial commit

Server.Helper/DiscordWebhook.cs

@@ -0,0 +1,118 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Text;
+
+namespace Server.Helper;
+
+public class DiscordWebhook
+{
+	public static class FormUpload
+	{
+		public class FileParameter
+		{
+			public byte[] File { get; set; }
+
+			public string FileName { get; set; }
+
+			public string ContentType { get; set; }
+
+			public FileParameter(byte[] file)
+				: this(file, null)
+			{
+			}
+
+			public FileParameter(byte[] file, string filename)
+				: this(file, filename, null)
+			{
+			}
+
+			public FileParameter(byte[] file, string filename, string contenttype)
+			{
+				File = file;
+				FileName = filename;
+				ContentType = contenttype;
+			}
+		}
+
+		private static readonly Encoding encoding = Encoding.UTF8;
+
+		public static HttpWebResponse MultipartFormDataPost(string postUrl, string userAgent, Dictionary<string, object> postParameters)
+		{
+			string text = $"----------{Guid.NewGuid():N}";
+			string contentType = "multipart/form-data; boundary=" + text;
+			byte[] multipartFormData = GetMultipartFormData(postParameters, text);
+			return PostForm(postUrl, userAgent, contentType, multipartFormData);
+		}
+
+		private static HttpWebResponse PostForm(string postUrl, string userAgent, string contentType, byte[] formData)
+		{
+			if (!(WebRequest.Create(postUrl) is HttpWebRequest httpWebRequest))
+			{
+				throw new NullReferenceException("request is not a http request");
+			}
+			httpWebRequest.Method = "POST";
+			httpWebRequest.ContentType = contentType;
+			httpWebRequest.UserAgent = userAgent;
+			httpWebRequest.CookieContainer = new CookieContainer();
+			httpWebRequest.ContentLength = formData.Length;
+			using (Stream stream = httpWebRequest.GetRequestStream())
+			{
+				stream.Write(formData, 0, formData.Length);
+				stream.Close();
+			}
+			return httpWebRequest.GetResponse() as HttpWebResponse;
+		}
+
+		private static byte[] GetMultipartFormData(Dictionary<string, object> postParameters, string boundary)
+		{
+			Stream stream = new MemoryStream();
+			bool flag = false;
+			foreach (KeyValuePair<string, object> postParameter in postParameters)
+			{
+				if (flag)
+				{
+					stream.Write(encoding.GetBytes("\r\n"), 0, encoding.GetByteCount("\r\n"));
+				}
+				flag = true;
+				if (postParameter.Value is FileParameter)
+				{
+					FileParameter fileParameter = (FileParameter)postParameter.Value;
+					string s = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"; filename=\"{2}\"\r\nContent-Type: {3}\r\n\r\n", boundary, postParameter.Key, fileParameter.FileName ?? postParameter.Key, fileParameter.ContentType ?? "application/octet-stream");
+					stream.Write(encoding.GetBytes(s), 0, encoding.GetByteCount(s));
+					stream.Write(fileParameter.File, 0, fileParameter.File.Length);
+				}
+				else
+				{
+					string s2 = $"--{boundary}\r\nContent-Disposition: form-data; name=\"{postParameter.Key}\"\r\n\r\n{postParameter.Value}";
+					stream.Write(encoding.GetBytes(s2), 0, encoding.GetByteCount(s2));
+				}
+			}
+			string s3 = "\r\n--" + boundary + "--\r\n";
+			stream.Write(encoding.GetBytes(s3), 0, encoding.GetByteCount(s3));
+			stream.Position = 0L;
+			byte[] array = new byte[stream.Length];
+			stream.Read(array, 0, array.Length);
+			stream.Close();
+			return array;
+		}
+	}
+
+	private static string defaultUserAgent = "";
+
+	private static string defaultAvatar = "";
+
+	public static string Send(string mssgBody, string userName, string webhook)
+	{
+		HttpWebResponse httpWebResponse = FormUpload.MultipartFormDataPost(webhook, defaultUserAgent, new Dictionary<string, object>
+		{
+			{ "username", userName },
+			{ "content", mssgBody },
+			{ "avatar_url", defaultAvatar }
+		});
+		string result = new StreamReader(httpWebResponse.GetResponseStream()).ReadToEnd();
+		httpWebResponse.Close();
+		return result;
+	}
+}