(Java) curl with OAuth2 Client Credentials

See more CURL Examples

This example shows how to run a simple CURL command with an OAuth2 access token for authorization. We use CURL to retrieve a SharePoint site ID, and Chilkat automatically fetches the OAuth2 access token using the provided credentials.

Note: This example requires Chilkat v11.5.0 or greater.

Chilkat Java Downloads

Java Libs for Windows, MacOS, Linux, Alpine Linux

Java Libs for Android

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;

    // This example will run the following curl command

    // curl -X GET "https://graph.microsoft.com/v1.0/sites/{{sharepoint_hostname}}:/sites/{{site_name}}" \
    //   -H "Authorization: Bearer ACCESS_TOKEN" \
    //   -H "Accept: application/json"

    CkStringBuilder sb = new CkStringBuilder();
    sb.AppendLn("curl -X GET \"https://graph.microsoft.com/v1.0/sites/{{sharepoint_hostname}}:/sites/{{site_name}}\" \\");
    sb.AppendLn("  -H \"Authorization: Bearer ACCESS_TOKEN\" \\");
    sb.AppendLn("  -H \"Accept: application/json\"");

    // Build the JSON that provides information for getting the OAuth2 access token using the OAuth2 client credentials flow.
    CkJsonObject jsonOAuth2 = new CkJsonObject();

    jsonOAuth2.UpdateString("oauth2.client_id","CLIENT_ID");
    jsonOAuth2.UpdateString("oauth2.client_secret","CLIENT_SECRET");
    jsonOAuth2.UpdateString("oauth2.scope","https://graph.microsoft.com/.default");
    jsonOAuth2.UpdateString("oauth2.token_endpoint","https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token");

    CkHttpCurl httpCurl = new CkHttpCurl();

    // Provide the information for getting the OAuth2 access token from the token endpoint
    // Note: The Authorization header specified in the curl command will be ignored and replaced using the OAuth2 access token obtained at runtime from the token endpoint.
    httpCurl.SetAuth(jsonOAuth2);

    // The placeholders {{sharepoint_hostname}} and {{site_name}} represent variables that must be defined before execution.
    // When DoYourThing runs the curl command, it automatically substitutes these placeholders with their corresponding values.
    // Below are the values assigned to these variables:
    httpCurl.SetVar("sharepoint_hostname","example.sharepoint.com");
    httpCurl.SetVar("site_name","test");

    // Run the curl command.
    success = httpCurl.DoYourThing(sb.getAsString());
    if (success == false) {
        System.out.println(httpCurl.lastErrorText());
        return;
        }

    CkJsonObject responseJson = new CkJsonObject();
    responseJson.put_EmitCompact(false);

    httpCurl.GetResponseJson(responseJson);

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

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