(Java) Upload String to Google Cloud Storage

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

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PTextSb method.

Chilkat Java Downloads

Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris

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[])
  {
    // 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}";

    // Note: The PTextSb method first appears in Chilkat v9.5.0.69
    CkHttpResponse resp = http.PTextSb("POST",url,sbXml,"utf-8","application/xml",false,false);
    if (http.get_LastMethodSuccess() == 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="
    // }
  }
}