Read the REST Response Body in Chunks

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Demonstrates Rest.ReadRespChunkBd, which reads the response body one chunk at a time, appending each chunk to a BinData. A return value of 0 signals the body is complete, while -1 indicates a read failure.

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;
        }

    success = rest.SendReqNoBody("GET","/api/largefile");
    if (success == false) {
        System.out.println(rest.lastErrorText());
        return;
        }

    int statusCode = rest.ReadResponseHeader();
    if (statusCode < 0) {
        System.out.println(rest.lastErrorText());
        return;
        }

    //  Check for the expected success status code.  If the response is not 200, the body is likely
    //  error text formatted as JSON, XML, or HTML rather than the expected content.  In that case read
    //  the body as text, report it, and return.
    if (statusCode != 200) {
        CkStringBuilder sbError = new CkStringBuilder();
        success = rest.ReadRespSb(sbError);
        if (success == false) {
            System.out.println(rest.lastErrorText());
            return;
            }

        System.out.println("Request failed with status code " + statusCode);
        System.out.println(sbError.getAsString());
        return;
        }

    //  The status code is 200.  Read the response body in chunks, appending each chunk to the BinData.
    //  Each call waits until at least the requested number of bytes is available, unless the response
    //  ends first.  A return value of 0 means the final bytes were returned and the body is complete;
    //  -1 indicates a read failure.
    CkBinData bdBody = new CkBinData();
    int chunkResult = rest.ReadRespChunkBd(8192,bdBody);
    while (chunkResult > 0) {
        chunkResult = rest.ReadRespChunkBd(8192,bdBody);
        }

    if (chunkResult < 0) {
        System.out.println(rest.lastErrorText());
        return;
        }

    System.out.println("Received " + bdBody.get_NumBytes() + " bytes.");
  }
}