Java Requires Chilkat v11.5.0+

curl POST with JSON Input and JSON Output

See more CURL Examples

Demonstrates running a simple curl command with JSON input and JSON output. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.HttpCurl;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // Run the following curl command

        //  curl -X POST https://httpbin.org/post \
        //       -H "Content-Type: application/json" \
        //       -d '{
        //             "title": "foo",
        //             "body": "bar",
        //             "userId": 1
        //           }'

        // The backslashes at the end of lines are not required.  Chilkat ignores them if present.
        StringBuilder sbTargetCurl = new StringBuilder();
        sbTargetCurl.appendLn(" curl -X POST https://httpbin.org/post \\");
        sbTargetCurl.appendLn("      -H \"Content-Type: application/json\" \\");
        sbTargetCurl.appendLn("      -d '{");
        sbTargetCurl.appendLn("            \"title\": \"foo\",");
        sbTargetCurl.appendLn("            \"body\": \"bar\",");
        sbTargetCurl.appendLn("            \"userId\": 1");
        sbTargetCurl.appendLn("          }'");

        HttpCurl httpCurl = new HttpCurl();

        // Run the curl command.
        try {
            httpCurl.doYourThing(sbTargetCurl.getAsString());
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        JsonObject responseJson = new JsonObject();
        responseJson.setEmitCompact(false);

        httpCurl.getResponseJson(responseJson);

        int statusCode = httpCurl.getStatusCode();
        System.out.println("response status code: " + statusCode);

        System.out.println(responseJson.emit());

        // Output:

        // response status code: 200
        // {
        //   "args": {},
        //   "data": "{\r\n            \"title\": \"foo\",\r\n            \"body\": \"bar\",\r\n            \"userId\": 1\r\n          }",
        //   "files": {},
        //   "form": {},
        //   "headers": {
        //     "Content-Length": "96",
        //     "Content-Type": "application/json",
        //     "Host": "httpbin.org",
        //     "X-Amzn-Trace-Id": "Root=1-69e8db8b-459b3bdf7b7a3bc749184968"
        //   },
        //   "json": {
        //     "body": "bar",
        //     "title": "foo",
        //     "userId": 1
        //   },
        //   "origin": "123.222.222.222",
        //   "url": "https://httpbin.org/post"
        // }

        // ----------------------------------------------------------------------------------
        // Another example:

        // curl -X POST https://postman-echo.com/post \
        //      -H "Content-Type: application/json" \
        //      -d '{"foo":"bar"}'

        String targetCurl = "curl -X POST https://postman-echo.com/post -H \"Content-Type: application/json\" -d '{\"foo\":\"bar\"}'";

        // Run the curl command.
        try {
            httpCurl.doYourThing(targetCurl);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        httpCurl.getResponseJson(responseJson);

        statusCode = httpCurl.getStatusCode();
        System.out.println("response status code: " + statusCode);

        System.out.println(responseJson.emit());

        // Output:

        // response status code: 200
        // {
        //   "args": {},
        //   "data": {
        //     "foo": "bar"
        //   },
        //   "files": {},
        //   "form": {},
        //   "headers": {
        //     "host": "postman-echo.com",
        //     "content-length": "13",
        //     "content-type": "application/json",
        //     "x-forwarded-proto": "https",
        //     "accept-encoding": "gzip, br"
        //   },
        //   "json": {
        //     "foo": "bar"
        //   },
        //   "url": "https://postman-echo.com/post"
        // }
    }
}