How to connect Django with MT5 using Webrequest?

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I have made a Python Django API model. I am trying hard for the last few weeks to read the JSON object using Webrequest but I am getting error 4029 Invalid array. Previously I had connected Telegram with MT5 using the Webrequest and it worked. But it is not working for Django. I run the Django API using the runserver command on the localhost. Can anyone help?
 

This is the JSON object that I want to read:

{"signals":[{"id":1,"signal":"buylimit\r\nGBPUSD\r\n240\r\n1\r\n0\r\n3\r\n2\r\nLiteFinance"},{"id":2,"signal":"selllimit\r\nEURUSD\r\n240\r\n0\r\n0\r\n3\r\n1"},{"id":3,"signal":"selllimit\r\nEURNZD\r\n240\r\n2\r\n0\r\n3\r\n1"}]}

These are the request headers from Django:

Allow: GET, HEAD, OPTIONS
Content-Length: 228
Content-Type: application/json
Cross-Origin-Opener-Policy: same-origin
Date: Mon, 06 Nov 2023 11:27:34 GMT
Referrer-Policy: same-origin
Server: WSGIServer/0.2 CPython/3.8.8
Vary: Accept, Cookie
X-Content-Type-Options: nosniff
X-Frame-Options: DENY

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.5
Connection: keep-alive
Host: 127.0.0.1:8000
Referer: http://127.0.0.1:8000/signals/signals
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0

This is the MQL5 code that I am trying to execute:

CJAVal js;
   string request_headers="Content-Type: application/json" + "\r\n"; 
   
  //"Accept:application/json, text/javascript, */*; q=0.0\r\nContent-Type:application/x-www-form-urlencoded";


   //string request_headers="Content-Type: application/json";
   string response_headers;
   //char post[], result[];
   char post[];
   char signals[];
  
  
   string url = "http://127.0.0.1:8000/signals/signals";
   //int r = WebRequest("POST", "http://127.0.0.1/api/symbol/","Content-Type: application/json",5000, data,res_data, res_headers);
   //int res = WebRequest("GET", url, request_headers, 5000, post, signals, response_headers);
   int res = WebRequest("GET", url, NULL,request_headers, 10000, post, ArraySize(post), signals, response_headers);
   
   //int res = WebRequest("GET", url, NULL, "", 5000, post, ArraySize(post), signals, headers);
   //4029 ERR_ARRAY_INVALID Invalid array
I am looking for help in solving this problem.
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