Java

Send a Staged Multipart REST Request

Demonstrates Rest.SendReqMultipart, which sends a multipart request using the parts configured on the object, then reads the response in separate steps.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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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;

    CkRest rest = new CkRest();
    boolean bTls = true;
    boolean bAutoReconnect = true;
    success = rest.Connect("example.com",443,bTls,bAutoReconnect);
    if (success == false) {
        System.out.println(rest.lastErrorText());
        return;
        }

    //  Configure one multipart part before sending.
    rest.put_PartSelector("1");
    rest.AddHeader("Content-Type","text/plain");
    rest.AddHeader("Content-Disposition","form-data; name=\"field1\"");
    success = rest.SetMultipartBodyString("value1");
    if (success == false) {
        System.out.println(rest.lastErrorText());
        return;
        }

    //  Send the multipart request using the configured parts.
    success = rest.SendReqMultipart("POST","/api/upload");
    if (success == false) {
        System.out.println(rest.lastErrorText());
        return;
        }

    //  After sending, read the response status line and header fields.  The return value is the HTTP
    //  status code, or -1 if no response was received.
    int statusCode = rest.ReadResponseHeader();
    if (statusCode < 0) {
        System.out.println(rest.lastErrorText());
        return;
        }

    System.out.println("Response status code: " + statusCode);

    //  Read the response body as text.
    String responseBody = rest.readRespBodyString();
    if (rest.get_LastMethodSuccess() == false) {
        System.out.println(rest.lastErrorText());
        return;
        }

    System.out.println(responseBody);
  }
}