Java

S3 Upload String using AWS Signature Version 2

See more Amazon S3 (new) Examples

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthAws;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.FileAccess;
import com.chilkatsoft.chilkat2.Rest;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
        // of a string variable to an object in a bucket.

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

        Rest rest = new Rest();

        // Connect to the Amazon AWS REST server.
        boolean bTls = true;
        int port = 443;
        boolean bAutoReconnect = true;
        // The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
        rest.connect("chilkat100.s3.amazonaws.com", port, bTls, bAutoReconnect);

        // ----------------------------------------------------------------------------
        // Important: For buckets created in regions outside us-east-1,
        // there are three important changes that need to be made.
        // See Working with S3 Buckets in Non-us-east-1 Regions for the details.
        // ----------------------------------------------------------------------------

        // Provide AWS credentials for the REST call.
        AuthAws authAws = new AuthAws();
        authAws.setAccessKey("AWS_ACCESS_KEY");
        authAws.setSecretKey("AWS_SECRET_KEY");
        authAws.setServiceName("s3");

        // For AWS Signature Version 2, the following two properties need to be set:
        authAws.setSignatureVersion(2);
        // See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
        // The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
        // the URI path passed to the FullRequestString method below.
        authAws.setCanonicalizedResourceV2("/chilkat100/hamlet_play.xml");

        rest.setAuthAws(authAws);

        // Load a text file into memory.
        FileAccess fac = new FileAccess();
        String fileContents;
        String responseBodyStr;
        try {
            fileContents = fac.readEntireTextFile("qa_data/xml/hamlet.xml", "utf-8");

            // To send the file in gzip or deflate compressed format, set the Content-Encoding request
            // header to "gzip" or "deflate".  (this is optional)
            rest.addHeader("Content-Encoding", "gzip");

            // Indicate the Content-Type of our upload.  (This is optional)
            rest.addHeader("Content-Type", "text/xml");

            // We can add an "Expect: 100-continue" header so that if the request is rejected
            // by the server immediately after receiving the request header, it can respond
            // and the client (Chilkat) can avoid sending the file data.
            // (this is optional)
            rest.addHeader("Expect", "100-continue");

            // Upload the file to Amazon S3.
            responseBodyStr = rest.fullRequestString("PUT", "/hamlet_play.xml", fileContents);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Did we get a 200 response indicating success?
        int statusCode = rest.getResponseStatusCode();
        if (statusCode != 200) {
            System.out.println("Error response: " + responseBodyStr);
            System.out.println("Status code: " + statusCode + ", Status text: " + rest.getResponseStatusText());
            return;
        }

        System.out.println("File successfully uploaded.");
    }
}