Java

URL Encoding Charset in POST Query Params

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Demonstrates how to control the URL encoding charset in POST query params. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // We have the string "MÆRSK".
    String nameWin1252Encoded = "M%E6RSK";

    CkStringBuilder sb = new CkStringBuilder();
    success = sb.DecodeAndAppend(nameWin1252Encoded,"url","windows-1252");

    CkHttp http = new CkHttp();

    // We're setting the session log filename so we can see the exact request sent.
    http.put_SessionLogFilename("qa_output/sessionLog.txt");

    // First demonstrate a simple application/x-www-form-urlencoded POST

    CkHttpRequest req = new CkHttpRequest();

    // Set the Charset = "utf-8" to cause URL encoding to use utf-8.
    req.put_Charset("utf-8");

    req.AddParam("name",sb.getAsString());

    req.put_HttpVerb("POST");
    req.put_ContentType("application/x-www-form-urlencoded");

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpReq("https://www.chilkatsoft.com/something",req,resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    // ---------------------------------------------------------------
    // Switch to windows-1252

    req.put_Charset("windows-1252");
    req.put_HttpVerb("POST");
    req.put_ContentType("application/x-www-form-urlencoded");

    success = http.HttpReq("https://www.chilkatsoft.com/something",req,resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // This is the request that is sent:
    // Notice that windows-1252 is used in the query param (the letter 'Æ' is %E6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 12
    // 
    // 	name=M%E6RSK

    // ---------------------------------------------------------------
    // Let's do the same with HttpSReq, switching back to utf-8

    req.put_Path("/something");
    req.put_HttpVerb("POST");
    req.put_ContentType("application/x-www-form-urlencoded");

    req.put_Charset("utf-8");
    success = http.HttpSReq("www.chilkatsoft.com",443,true,req,resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    // ---------------------------------------------------------------
    // Let's do a POST with XML body where the query params are in the HTTP request start line, 
    // and the Content-Type is text/xml where the body of the request is XML.

    req.put_Path("/something");
    req.put_HttpVerb("POST");
    req.put_ContentType("text/xml");
    success = req.LoadBodyFromString("<test>123</test>","utf-8");
    req.put_Charset("utf-8");

    // Remember... our request object still contains the query param added in the above call to AddParam.
    success = http.HttpSReq("www.chilkatsoft.com",443,true,req,resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something?name=M%C3%A6RSK HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: text/xml
    // 	Content-Length: 16
    // 
    // 	<test>123</test>
  }
}