Raw HTTP Request Using Sockets

TestSocket.java

import com.pagero.services.protocol.as2outbound.core.util.IOUtil;

import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class TestSocket {
    public static void main(String[] args) {
        int SERVER_PORT = 31481;
        try {
            Socket conn = new Socket("dev.localhost",SERVER_PORT);
            InputStream in = new FileInputStream("/home/kanishka/Downloads/data.txt");
            OutputStream out = conn.getOutputStream();
            IOUtil.copy(in , conn.getOutputStream());
            out.flush();
            out.close();
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

/**
Sample HTTP format for data.txt

POST /inbound/as2 HTTP/1.0
X-Forwarded-Proto: https
Host: www.abc.com
Connection: close
Content-Length: 16403
content-disposition: attachment; filename="smime.p7m"
AS2-From: A1
Disposition-Notification-To: A1
AS2-Version: 1.2
content-type: application/pkcs7-mime; name="smime.p7m"; smime-type=enveloped-data
Message-ID: <123.abc@as2>
AS2-To: B1
Disposition-Notification-Options: signed-receipt-protocol=optional, pkcs7-signature; signed-receipt-micalg=optional, sha-256, sha1, sha-224, sha-384, sha-512, md5
Subject: AAAAA
Date: Fri, 22 Mar 2019 13:26:38 GMT
User-Agent: Apache-HttpClient/4.5.3 (Java/1.8.0_152)
Accept-Encoding: gzip,deflate

HTTP BODY

**/