curl --request POST \
  --url http://localhost:8080/proxy \
  --header 'Content-Type: application/json' \
  --header 'T-PROXY-URL: <t-proxy-url>' \
  --header 'T-REQUEST-ID: <t-request-id>' \
  --data '
{
  "title": "usher",
  "body": "labs",
  "userId": 10
}
'

import requests

url = "http://localhost:8080/proxy"

payload = {
    "title": "usher",
    "body": "labs",
    "userId": 10
}
headers = {
    "T-PROXY-URL": "<t-proxy-url>",
    "T-REQUEST-ID": "<t-request-id>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'T-PROXY-URL': '<t-proxy-url>',
    'T-REQUEST-ID': '<t-request-id>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({title: 'usher', body: JSON.stringify('labs'), userId: 10})
};

fetch('http://localhost:8080/proxy', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_PORT => "8080",
  CURLOPT_URL => "http://localhost:8080/proxy",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'title' => 'usher',
    'body' => 'labs',
    'userId' => 10
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "T-PROXY-URL: <t-proxy-url>",
    "T-REQUEST-ID: <t-request-id>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "http://localhost:8080/proxy"

	payload := strings.NewReader("{\n  \"title\": \"usher\",\n  \"body\": \"labs\",\n  \"userId\": 10\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("T-PROXY-URL", "<t-proxy-url>")
	req.Header.Add("T-REQUEST-ID", "<t-request-id>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("http://localhost:8080/proxy")
  .header("T-PROXY-URL", "<t-proxy-url>")
  .header("T-REQUEST-ID", "<t-request-id>")
  .header("Content-Type", "application/json")
  .body("{\n  \"title\": \"usher\",\n  \"body\": \"labs\",\n  \"userId\": 10\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://localhost:8080/proxy")

http = Net::HTTP.new(url.host, url.port)

request = Net::HTTP::Post.new(url)
request["T-PROXY-URL"] = '<t-proxy-url>'
request["T-REQUEST-ID"] = '<t-request-id>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"title\": \"usher\",\n  \"body\": \"labs\",\n  \"userId\": 10\n}"

response = http.request(request)
puts response.read_body

{}