One: First, let’s publish a web service

package com.ws.service;

public interface IUserService
{
public String getUserName(String id);
}
package com.ws.service;

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;

@WebService
public class UserService implements IUserService
{
@WebMethod
public String getUserName(@WebParam(name=”id”) String id)
{
return “User:” + id;
}
}
package com.ws.service;

import javax.xml.ws.Endpoint;

public class Server
{
public static void main(String[] args)
{
Endpoint.publish(“http://0.0.0.0:6633/api/v1/user”, new UserService());
System.out.println(“ws startup ok on port ” + 6633);
}
}

The port of ws is 6633
The access address is: http://192.168.100.95:6633/api/v1/user?wsdl

Then, nginx is configured as follows.

upstream webservice {
server 192.168.10.95:6633;
}
server {
listen 6633;
location/{
proxy_pass http://webservice;
}
}

The nginx address is: 192.168.2.123
Then visit the proxy address: http://192.168.2.123:6633/api/v1/user?wsdl

The result is as follows

The address here is clearly wrong.

The solution is as follows

The nginx configuration is changed to

upstream webservice {
server 192.168.100.95:6633;
}
server {
listen 6633;
location/{
proxy_set_header Host $host:$server_port;
proxy_pass http://webservice;
}
}

The reason for this is that if you don’t configure
proxy_set_header Host $host:$server_port;
then, nginx reverse proxy to the backend, passing the Host http header as
Host=webservice