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whatsmate/group-send-telegram-pdf.cs

Created July 21, 2022 07:31
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How to send a PDF file to a Telegram group in C# using Visual Studio 2022
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group-send-telegram-pdf.cs
using System;
using System.Net;
using System.Text.Json;
using System.IO;
using System.Text;
class TelegramGroupPdfSender
{
// TODO: Replace the following with your gateway instance ID, client ID and secret!
private static string INSTANCE_ID = "YOUR_INSTANCE_ID";
private static string CLIENT_ID = "YOUR_CLIENT_ID_HERE";
private static string CLIENT_SECRET = "YOUR_CLIENT_SECRET_HERE";
private static string DOCUMENT_GROUP_API_URL = "https://api.whatsmate.net/v3/telegram/group/document/message/" + INSTANCE_ID;
static void Main(string[] args)
{
TelegramGroupPdfSender groupPdfSender = new TelegramGroupPdfSender();
// TODO: Put down group name and group admin below
string group_name = "Muscle Men Club";
string group_admin = "19159876123";
// TODO: Remember to copy the PDF from ..\assets to the TEMP directory!
string base64Content = convertFileToBase64("C:\\TEMP\\subwaymap.pdf");
string fn = "anyname.pdf";
string caption = "Check this out";
groupPdfSender.sendDocument(group_name, group_admin, base64Content, fn, caption);
Console.WriteLine("Press Enter to exit.");
Console.ReadLine();
}
// http://stackoverflow.com/questions/25919387/c-sharp-converting-file-into-base64string-and-back-again
static public string convertFileToBase64(string fullPathToDoc)
{
Byte[] bytes = File.ReadAllBytes(fullPathToDoc);
String base64Encoded = Convert.ToBase64String(bytes);
return base64Encoded;
}
public bool sendDocument(string group_name, string group_admin, string base64Content, string fn, string caption)
{
bool success = true;
try
{
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(DOCUMENT_GROUP_API_URL);
httpRequest.Method = "POST";
httpRequest.Accept = "application/json";
httpRequest.ContentType = "application/json";
httpRequest.Headers["X-WM-CLIENT-ID"] = CLIENT_ID;
httpRequest.Headers["X-WM-CLIENT-SECRET"] = CLIENT_SECRET;
GroupDocPayload payloadObj = new GroupDocPayload() { group_name = group_name, group_admin = group_admin, document = base64Content, filename = fn, caption = caption};
string postData = JsonSerializer.Serialize(payloadObj);
using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream()))
{
streamWriter.Write(postData);
}
var httpResponse = (HttpWebResponse)httpRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
Console.WriteLine(result);
}
}
catch (WebException webExcp)
{
Console.WriteLine("A WebException has been caught.");
Console.WriteLine(webExcp.ToString());
WebExceptionStatus status = webExcp.Status;
if (status == WebExceptionStatus.ProtocolError)
{
Console.Write("The REST API server returned a protocol error: ");
HttpWebResponse? httpResponse = webExcp.Response as HttpWebResponse;
Stream stream = httpResponse.GetResponseStream();
StreamReader reader = new StreamReader(stream);
String body = reader.ReadToEnd();
Console.WriteLine((int)httpResponse.StatusCode + " - " + body);
success = false;
}
}
catch (Exception e)
{
Console.WriteLine("A general exception has been caught.");
Console.WriteLine(e.ToString());
success = false;
}
return success;
}
public class GroupDocPayload
{
public string group_name { get; set; }
public string group_admin { get; set; }
public string document { get; set; }
public string filename { get; set; }
public string caption { get; set; }
}
}
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