Disable Transfer-Encoding chunked in wiremock standalone server

Question

I am running wiremock standalone using wiremockserver.

The application does not work in PCF because of the header Transfer-Encoding: chunked.

(If this header is present then in PCF I get the error 502 Bad Gateway: Registered endpoint failed to handle the request. and in headers x-cf-routererror endpoint_failure endpoint_failure (net/http: http/1.x transport connection broken: too many transfer encodings: ["chunked" "chunked"]).)

I don't want this header so I tried to disable the chunked encoding in wiremock:

@SpringBootApplication
public class MockApplication implements CommandLineRunner {

    private final int serverPort;

    private final ResourceLoader resourceLoader;

    public MockApplication(@Value("${server.port}") final int serverPort, final ResourceLoader resourceLoader) {
        this.serverPort = serverPort;
        this.resourceLoader = resourceLoader;
    }

    public static void main(final String[] args) {
        SpringApplication.run(MockApplication.class, args); //start springboot application
    }

    @Override
    public void run(final String... args) {
        final WireMockServer wireMockServer = new WireMockServer(options().port(serverPort+2)
                    .useChunkedTransferEncoding(Options.ChunkedEncodingPolicy.NEVER)
                    .extensions(new ResponseTemplateTransformer(false)));
        wireMockServer.start(); //start wiremock server
    }

Spring boot app posts data to wiremock app using restTemplate. sample request:

{
    "request": {
        "url": "/some-wiremock-endpoint",
        "method": "POST",
        "bodyPatterns": [
            {
                "contains": "12345"
            }
        ]
    },
    "response": {
        "status": 200,
        "headers": null,
        "body": "{\"books\":[{\"book_number\":\"12345\",\"book_code\":\"FICTION\"}]}"
    }
}

When the customer uses http://localhost:8080/some-wiremock-endpoint then the springboot app connects to wiremock url http://localhost:8082/some-wiremock-endpoint to retrieve the stub data from wiremock server:

ResponseEntity<String> exchange = null;
        try {
            exchange = restTemplate.exchange(wiremockUrlAndUri, HttpMethod.POST, request, String.class);
//http://localhost:8082/some-wiremock-endpoint is the wiremockUrlAndUri value in this case.

When I see exchange.getHeaders() then I still see Transfer-Encoding: chunked header.

How do I disable this header in Springboot application?

Answer 1

I changed the code a bit. Now it works :) What do you think of it?

using System;
using System.Drawing;
using System.Windows.Forms;

namespace App51
{
  public partial class Form1 : Form
  {
    Form2 frm2;
    Form3 frm3;


public Form1()
{
  InitializeComponent();
}


private void Form1_Load(object sender, EventArgs e)
{
  this.WindowState = FormWindowState.Maximized;
  IsMdiContainer = true;

  if (control is MdiClient)
  {
    control.BackColor = Color.DeepSkyBlue;
    break;
  }
}
  

private void abrirForm2ToolStripMenuItem_Click(object sender, EventArgs e)
{
  if (frm2 != null)
  {
    if (frm2.Visible == true)
    {
      frm2.WindowState = FormWindowState.Normal;
      frm2.BringToFront();
      frm2.Activate();
    }
    else
    {
      frm2 = new Form2();
      frm2.FormClosed += delegate { frm2 = null; };
      frm2.MdiParent = this;
      frm2.Show();
    }
  }
  else
  {
    frm2 = new Form2();
    frm2.FormClosed += delegate { frm2 = null; };
    frm2.MdiParent = this;
    frm2.Show();
  }
}


private void abrirForm3ToolStripMenuItem_Click(object sender, EventArgs e)
{
  if (frm3 != null)
  {
    if (frm3.Visible == true)
    {
      frm3.WindowState = FormWindowState.Normal;
      frm3.BringToFront();
      frm3.Activate();
    }
    else
    {
      frm3 = new Form3();
      frm3.FormClosed += delegate { frm3 = null; };
      frm3.MdiParent = this;
      frm3.Show();
    }
  }
  else
  {
    frm3 = new Form3();
    frm3.FormClosed += delegate { frm3 = null; };
    frm3.MdiParent = this;
    frm3.Show();
  }
}

} }