(Android™) ChartURL - Create a Signed URL

Demonstrates how to create a signed URL for ChartURL.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

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

    CkCrypt2 crypt = new CkCrypt2();

    // Example key: "dek-d7a46236eda961a6c3c18ffcc6b077ba87d27e9ae85f7842c6d427c265dd5f69d5131308d93332353d4a55a4b1160fcf516515a4a9f0aa50fbf2d7a2e7d0f1c5"
    String key = "charturl-sign-encrypt-key";
    // Example token: "dt-RwYN"
    String token = "charturl-token";

    String slug = "weekly-activity";
    String data = "{ \"options\": {\"data\": {\"columns\": [[\"This Week\",10,13],[\"Last Week\",9,5]]}}}";

    crypt.put_HashAlgorithm("SHA256");
    crypt.put_MacAlgorithm("HMAC");
    crypt.SetMacKeyString(key);
    crypt.put_EncodingMode("base64");

    CkJsonObject json = new CkJsonObject();
    json.Load(data);
    Log.i(TAG, "json = " + json.emit());

    String sig = crypt.macStringENC(json.emit());

    CkStringBuilder sbUrl = new CkStringBuilder();
    sbUrl.Append("https://charturl.com/i/");
    sbUrl.Append(token);
    sbUrl.Append("/");
    sbUrl.Append(slug);
    sbUrl.Append("?d=");
    sbUrl.Append(crypt.encodeString(json.emit(),"utf-8","url"));
    sbUrl.Append("&s=");
    sbUrl.Append(crypt.encodeString(sig,"utf-8","url"));

    Log.i(TAG, "Signed URL: " + sbUrl.getAsString());

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}