Java
Upload String to Google Cloud Storage

Demonstrates how to upload an in-memory string to Google Cloud Storage.
Chilkat Java Downloads

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;

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

    // This example uses a previously obtained access token having permission for the 
    // scope "https://www.googleapis.com/auth/cloud-platform"

    // In this example, Get Google Cloud Storage OAuth2 Access Token, 
    // the service account access token was saved to a text file.  This example fetches the access token from the file..
    CkStringBuilder sbToken = new CkStringBuilder();
    sbToken.LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8");

    // Send a POST equivalent to this curl command.
    // The content of the file is contained in the request body.

    // curl -X POST --data-binary @[OBJECT] \
    //     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
    //     -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
    //     "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

    CkHttp http = new CkHttp();
    http.put_AuthToken(sbToken.getAsString());

    // Create an XML document, and write it to a StringBuilder.
    // We'll be uploading this XML document.
    CkXml xml = new CkXml();
    xml.put_Tag("note");
    xml.UpdateChildContent("to","Tove");
    xml.UpdateChildContent("from","Jani");
    xml.UpdateChildContent("heading","Reminder");
    xml.UpdateChildContent("body","Don't forget me this weekend!");

    // Write the XML to sbXml.
    CkStringBuilder sbXml = new CkStringBuilder();
    xml.GetXmlSb(sbXml);

    // sbXml contains this:

    // <note>
    //     <to>Tove</to>
    //     <from>Jani</from>
    //     <heading>Reminder</heading>
    //     <body>Don't forget me this weekend!</body>
    // </note>

    // Construct a URL to upload to an object named "test.xml" in the "chilkat-ocean" bucket.
    http.SetUrlVar("bucket_name","chilkat-ocean");
    http.SetUrlVar("object_name","test.xml");
    String url = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}";

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpSb("POST",url,sbXml,"utf-8","application/xml",resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    int responseCode = resp.get_StatusCode();
    if (responseCode == 401) {
        System.out.println(resp.bodyStr());
        System.out.println("If invalid credentials, then it is likely the access token expired.");
        System.out.println("Your app should automatically fetch a new access token and re-try.");
        return;
        }

    System.out.println("Response code: " + responseCode);
    System.out.println("Response body");
    System.out.println(resp.bodyStr());

    // A successful response looks like this:
    // Response code: 200
    // Response body
    // {
    //  "kind": "storage#object",
    //  "id": "chilkat-ocean/test.xml/1502669565429870",
    //  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
    //  "name": "test.xml",
    //  "bucket": "chilkat-ocean",
    //  "generation": "1502669565429870",
    //  "metageneration": "1",
    //  "contentType": "application/xml",
    //  "timeCreated": "2017-08-14T00:12:45.379Z",
    //  "updated": "2017-08-14T00:12:45.379Z",
    //  "storageClass": "MULTI_REGIONAL",
    //  "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
    //  "size": "181",
    //  "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
    //  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
    //  "crc32c": "ZFd5sA==",
    //  "etag": "CO6Qpq241dUCEAE="
    // }
  }
}