HTTP Post Request - ESP8266HTTPClient generates wrong http headers

[schlaubstar]

Hi when using this simple code:

HTTPClient http;
string message="Hello from ESP8266";
http.begin("http://192.168.178.21:8000");
http.addHeader("Content-Type", "text/plain");
int httpCode = http.POST(message);
if(httpCode > 0) {
  Serial.printf("[HTTP] POST... code: %d\n", httpCode);
  if(httpCode == HTTP_CODE_OK) {
            String payload = http.getString();
            Serial.println(payload);
        }
    } else {
        Serial.printf("[HTTP] POST... failed, error: %s\n", http.errorToString(httpCode).c_str());
    }
http.end();

I always received the message: "error uploading payload" (like many others considering google and this issue list). So I did setup a server on my computer, to check about whats going on.

The matching message looks like this:
POST HTTP/1.1
Host: 192.168.178.34:8000
User-Agent: ESP8266HTTPClient
Connection: close
Accept-Encoding: identity;q=1,chunked;q=0.1,*;q=0
Content-Type: text/plain
Content-Length: 20

Hello from ESP8266!

The problem is caused by the wrong post header: If you manually generate the post message then it is working and everything looks the same except for the first line:
POST / HTTP/1.1

I assume, that HttpClient.Post(message) does generate a wrong header lacking one slash.
Maybe someone wants to fix this.

[igrr]

It looks like the URL you specify is lacking the trailing slash (after the port number). I suppose the library could be smart enough to handle this case and automatically add the slash, but it isn't :)

[schlaubstar]

Damn ! You're a genious ! I'm so sorry > That issue can be closed. Obviously I just needed to add a trailing "/" to the host .... But maybe it is of help to others.