Java Requires Chilkat v11.1.0+

Creating an application/json HTTP POST Request

See more HTTP Examples

Demonstrates how to create an HTTP POST request having the Content-Type application/json, where the body of the HTTP request is the following JSON:

{
   "username" : "my_username",
   "password" : "my_password",
   "validation-factors" : {
      "validationFactors" : [
         {
            "name" : "remote_address",
            "value" : "127.0.0.1"
         }
      ]
   }
}

The generated HTTP request looks like this:

POST /something HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: domain
Content-Length: 216

{
  "username": "my_username",
  "password": "my_password",
  "validation-factors": {
    "validationFactors": [
      {
        "name": "remote_address",
        "value": "127.0.0.1"
      }
    ]
  }
}

Chilkat2 Java

import com.chilkatsoft.chilkat2.HttpRequest;
import com.chilkatsoft.chilkat2.JsonArray;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example demonstrates building an application/json request.

        HttpRequest req = new HttpRequest();

        // The ContentType, HttpVerb, and Path properties should
        // always be explicitly set.
        req.setHttpVerb("POST");
        req.setPath("/something");
        req.setContentType("application/json");

        // We may wish to add an "Accept" header to the request.
        // This tells the server we'll accept an application/json response.
        req.addHeader("Accept", "application/json");

        // We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
        JsonObject json = new JsonObject();
        json.appendString("username", "my_username");
        json.appendString("password", "my_password");

        JsonObject vFactors = new JsonObject();
        json.appendObject2("validation-factors", vFactors);

        JsonArray vArray = new JsonArray();
        vFactors.appendArray2("validationFactors", vArray);

        JsonObject factorObj = new JsonObject();
        vArray.addObjectAt2(0, factorObj);
        factorObj.appendString("name", "remote_address");
        factorObj.appendString("value", "127.0.0.1");

        // Use the JSON for the HTTP request body
        // By default, the Emit method will output compact JSON.
        // This is best for generating the smallest size request.
        // To generate a more human-readable (pretty-printed) JSON request body,
        // set the EmitCompact property to FALSE
        json.setEmitCompact(false);
        req.loadBodyFromString(json.emit(), "utf-8");

        // View the request that would be sent if HttpSReq was called:
        String requestMime = req.generateRequestText();
        System.out.println(requestMime);

        // A few important comments about the HTTP request that is generated:
        //
        // 1) The Content-Length header is automatically generated based on the actual length of the MIME message
        //    that follows the intial (topmost) MIME header.
        // 2) The HOST header will automatically get filled in with the actual domain when HttpSReq
        //    is called.
    }
}