ESP8266 cannot read POST parameters

Question

I'm working on a simple REST server. I made method to handle http://<esp8266_IP>/test. The GET method works like a charm and I got the response. Then I tried to send a POST with a JSON data (I used PostMan) but I cannot read anything.

Searching online I read ESP8266 library cannot parse JSON and in that case I can found plain text into server.arg("plain"). I tried that but no success

How can I read the data into the POST method?

ESP8266WebServer server(80);
...
void handleTest()
{
 if (server.method() == HTTP_GET)
 {
 ...
 }
 else if (server.method() == HTTP_POST)
 {
 String message = "POST\nHeaders:\n";
 for (uint8_t i = 0; i < server.headers(); i++)
 {
 message += server.headerName(i) + ": " + server.header(i) + "\n";
 }
 message += "\nRequest params:\n";
 for (uint8_t i = 0; i < server.args(); i++){
 message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
 }
 server.send(202, "text/plain", message);
 } 
}
...
void setup()
{
 WiFi.begin(ssid, password);
 Serial.println("");
 // Wait for connection
 while (WiFi.status() != WL_CONNECTED) {
 delay(500);
 Serial.print(".");
 }
 if (MDNS.begin("esp8266")) {
 Serial.println(F("[Server] MDNS responder started"));
 }
 server.on("/test", handleTest);
}

• Mark Smith: Please show your code.
• dandavis: i'm not sure it can do that, aside from uploading files...
• Noisemaker: @MarkSmith I don't think it will be usefull, btw I paste a section of code in my question.

Answer 1

Instead of using below in handleTest()

else if (server.method() == HTTP_POST)

try using below in setup()

server.on("/test", POST, handleTest);