Java socket impersonate the HTTP protocol client POST request

Compared to a GET request, the post message has the following elements:

1,content-length, this is the length of the paper, in bytes.

2,content-type, this is mainly related to the format and character set of the message.

3, is the main message

Main class Simplehttppost:

package com.zws.http;import java.io.ioexception;import java.io.inputstream;import  java.io.outputstream;import java.net.inetsocketaddress;import java.net.socket;import  Java.net.socketaddress;import java.util.hashmap;import java.util.iterator;import java.util.map ;/** *  *  @author  wensh.zhu 2017-03-11   Request message format: Get /greeting.do? name=jack http/1.1\r\nhost: localhost:8011\r\nconnection: keep-alive\r\ncache-control:  max-age=0\r\nupgrade-insecure-requests: 1\r\nuser-agent: mozilla/5.0  (Windows NT 10.0 ;  wow64)  AppleWebKit/537.36  (Khtml, like gecko)  chrome/56.0.2924.87 safari/ 537.36\r\naccept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,* here is a slash (/) *;q=0.8\r\ Naccept-encoding: gzip, deflate, sdch, br\r\naccept-language: zh-cn,zh;q=0.8\r\ ncontent-length: 14\r\ncontent-type, application/x-www-form-urlencoded;charset=utf-8\r\n\r\nid=1&name=jack      Response message Format:   disposable response:  http/1.1 200 ok\r\nserver: apache-coyote/1.1\r\nset-cookie:  jsessionid=54b11be01cd7983726618546cf4521e1; path=/newer/; httponly\r\ncontent-type: text /html;charset=utf-8\r\ncontent-length: 4\r\n//message body Length date: sat, 11 mar 2017  15:16:10 gmt\r\n\r\n//header End abcd//body        Chunk response: http/1.1 200 ok\r\ ncontent-type: application/json;charset=utf-8\r\ntransfer-encoding: chunked\r\n//represents chunked response date:  sat, 11 mar 2017 14:19:25 gmt\r\n\r\n     //Header End 8\r\n// Hex length abcdefgh\r\n//body  2\r\nab\r\n0\r\n//End  */public class simplehttppost {private  int connecttimeout = 2000;//Link Timeout Time private int readtimeout = 5000;// Read timeout time private string host;private int port = 80;private string resource =  "/";p rivate string  reqline;private string body;private map<string, string> headers =  new HashMap<String, String> ();p ublic simplehttppost (String uri)  { Initrequestheader ();p arserequestline (URI);} Public simplehttppost (string uri, int connecttimeout, int readtimeout)  { Initrequestheader ();p arserequestline (URI); this.connecttimeout = connecttimeout;this.readtimeout  = readtimeout;} /** *  resolves the IP address, port, and request Resources  *  @param  uri */private void parserequestline ( String uri)  {String url = uri;if  (url == null)  throw new  nullpointerexception ("Uri can not be null");if  (!url.startswith ("http")) URL  =  "/http"  + uri; String[] parts = url.split("//");if  (parts.length >= 2)  {String mainPart = parts[1];int  Ipflag = mainpart.indexof ("/");if  (ipflag != -1)  {string ippart =  mainpart.substring (0, ipflag); resource = mainpart.substring (IpFlag); String[] ipparts = ippart.split (":");if  (ipparts.length > 1)  {host  = ipparts[0]; string portstr = ipparts[1];if  (portstr != null &&  Portstr.length ()  > 0) port = integer.parseint (PORTSTR);}  else {host = ippart;}}  else {host = mainpart;}}  else {throw new illegalargumentexception ("illegal uri");} string hostval = host;if  (port != 80)  hostVal +=  ":"  +  Port;headers.put ("Host",  hostval);reqline =  "post "  + resource +  "  http/1.1\r\n ";} /** *  initialization of the request header  */private void initrequestheader ()  {headers.put ("Connection",  "Keep-alive"); Headers.put ("Upgrade-insecure-requests",  "1"); Headers.put ("User-agent",  "Java  Client "), Headers.put (" Accept ", " text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q= 0.8 "), Headers.put (" accept-encoding ", " gzip "), Headers.put (" Accept-language ", " Zh-cn,zh "); Headers.put ( "Content-type",  "Application/x-www-form-urlencoded;charset=utf-8");} Public void setheader (String key, string value)  {headers.put (key, value);} Private void concatparam (map<string, string> parameters) {if  (parameters ==  null | |  parameters.isempty ())  return; string params =  ""; Iterator<string> itor = parameters.keyset (). Iterator (); while  (Itor.hasnext ())  {string key = itor.next (); String val = pArameters.get (Key);p arams +=  ("&"  + key +  "="  + val);} Body = params.replacefirst ("&",  ");} Public respmsg req (map<string, string> parameters)  {concatparam (parameters); int  contentLen = 0;if  (Body != null) contentlen = body.getbytes (). length; This.headers.put ("Content-length",  string.valueof (Contentlen)); respmsg msg = null; socket socket = null;outputstream out = null;inputstream in =  Null;try {socketaddress endpoint = new inetsocketaddress (host, port); socket  = new socket (); Socket.connect (endpoint, connecttimeout); Socket.setsotimeout (ReadTimeout) ; Out = socket.getoutputstream (); write (out); In = socket.getinputstream ();msg =  Read (in);  catch  (exception e)  {e.printstacktrace ();}  finally {try {if  (Out != null) out.close ();if  (in != null) in.close ();if  (socket  != null)  socket.close ();}  catch  (Exception e2)  {e2.printstacktrace ();}} Return msg;} Private void write (outputstream out)  throws ioexception {string reqbody  = reqline;iterator<string> itor = headers.keyset (). Iterator ();while  ( Itor.hasnext ())  {string key = itor.next (); String val = headers.get (key); string header = key +  ":"  + val +  "\ r \ n";reqbody +=  Header;} reqbody +=  "\ r \ n"; Reqbody += body;out.write (Reqbody.getbytes ("UTF-8"));} Private respmsg read (inputstream in)  throws ioexception {respmsg respmsg  = new respmsg (); Byte[] heads = httpstreamreader.readheaders (in); String headstr = new sTring (heads); String[] lines = headstr.split ("\ r \ n"); Respheader resp = new respheader ();if  (lines.length > 0)   Resp.setrespline (Lines[0]);for  (int i = 1; i < lines.length; i++)  resp.addheader (Lines[i]); string body = null;if  (resp.ischunked ())  {body = readchunked (in);  else {int bodylen = resp.getcontentlenth ();byte[] bodybts = new  Byte[bodylen];in.read (BODYBTS); Body = new string (bodybts,  "UTF-8");} Respmsg.setrespbody (body); String respline = resp.getrespline (); respmsg.setrespcodemsg (respline); return respMsg;} /** *  chunked Read  *  @param  in *  @return  *  @throws  IOException  */private static string readchunked (inputstream in)  throws ioexception { string content =  ""; string lenstr =  "0";while  (!) ( Lenstr = new string (Httpstreamreader.readline (in))). Equals ("0"))  {int len =  integer.valueof (Lenstr.touppercase (), 16);//length 16 binary means byte[] cnt = new byte[len]; In.read (CNT); Content += new string (cnt,  "UTF-8"); In.skip (2);} Return content;}}

Test class Example:

Package Com.zws.http;import Java.util.hashmap;import Java.util.map;public class Example {public static void main (String [] args) {post ();} public static void Post () {String uri = "Http://localhost:8080/Newer/server.action"; map<string, string> params = new hashmap<string, string> ();p arams.put ("id", "123");p arams.put ("name", "Zhang San" ); Simplehttppost post = new Simplehttppost (URI); Respmsg msg = post.req (params); String respcodemsg = msg.getrespcodemsg (); String respbody = Msg.getrespbody (); System.out.println (RESPCODEMSG); System.out.println (Respbody);}}

This article is from the "Evan" blog, be sure to keep this source http://wenshengzhu.blog.51cto.com/5151285/1905644

Java socket impersonate the HTTP protocol client POST request