Created s3 (markdown)

wiki/s3-sample.md

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+Here is a sample controller class that uploads to your S3 Bucket.
+
+Dependencies: http://aws.amazon.com/de/sdk-for-java/
+
+    package <you package>;
+
+    import com.amazonaws.AmazonClientException;
+    import com.amazonaws.auth.AWSCredentials;
+    import com.amazonaws.auth.BasicAWSCredentials;
+    import com.amazonaws.services.s3.AmazonS3;
+    import com.amazonaws.services.s3.AmazonS3Client;
+    import com.amazonaws.services.s3.model.GetObjectRequest;
+    import com.amazonaws.services.s3.model.ListObjectsRequest;
+    import com.amazonaws.services.s3.model.ObjectListing;
+    import com.amazonaws.services.s3.model.ObjectMetadata;
+    import com.amazonaws.services.s3.model.PutObjectRequest;
+    import com.amazonaws.services.s3.model.S3Object;
+    import com.amazonaws.services.s3.model.S3ObjectSummary;
+    import java.io.BufferedInputStream;
+    import java.io.BufferedOutputStream;
+    import java.io.File;
+    import java.io.FileNotFoundException;
+    import java.io.FileOutputStream;
+    import java.io.IOException;
+    import java.io.InputStream;
+    import java.io.OutputStream;
+
+    /**
+     *
+     * @author Guy Saldanha
+     */
+    public class S3Controller {
+
+        public static final String s3endpoint = "https://s3-eu-west-1.amazonaws.com/";
+        
+        public static final String profileImageBucket = "<your bucket>";
+        
+        private static final String accessKey = "<S3 access key>";
+
+        private static final String secretKey = "<S3 secret key>";
+       
+        // put 
+        public void put(String filename, String bucketName, File file)
+                throws FileNotFoundException {
+            AWSCredentials myCredentials = new BasicAWSCredentials(accessKey, secretKey);
+            AmazonS3 s3 = new AmazonS3Client(myCredentials);
+            PutObjectRequest putObject = new PutObjectRequest(bucketName, filename, file);
+            ObjectMetadata metaData = new ObjectMetadata();
+            metaData.setContentType("image/jpeg");
+            metaData.setContentLength(file.length());
+            putObject.setMetadata(metaData);
+            s3.putObject(putObject);
+
+        }
+
+        // delete file
+        public void delete(String fileName, String bucketName) {
+            AWSCredentials myCredentials = new BasicAWSCredentials(accessKey, secretKey);
+            AmazonS3 s3 = new AmazonS3Client(myCredentials);
+            s3.deleteObject(bucketName, fileName);
+        }
+
+        // get a private file to local storage
+        public void get(String fileName, String bucketName, File localFile) {
+            AWSCredentials myCredentials = new BasicAWSCredentials(accessKey, secretKey);
+            AmazonS3 s3 = new AmazonS3Client(myCredentials);
+            try {
+                S3Object object = s3.getObject(new GetObjectRequest(bucketName, fileName));
+                InputStream inputStream = new BufferedInputStream(object.getObjectContent());
+                try {
+                    try (OutputStream outputStream = new BufferedOutputStream(new FileOutputStream(localFile))) {
+                        int read = -1;
+                        while ((read = inputStream.read()) != -1) {
+                            outputStream.write(read);
+                        }
+                        outputStream.flush();
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace(System.err);
+                } finally {
+                    try {
+                        inputStream.close();
+                    } catch (IOException e) {
+                    }
+                }
+            } catch (AmazonClientException e) {
+            }
+        }
+
+        public boolean fileExists(String fileName, String bucketName) {
+            AWSCredentials myCredentials = new BasicAWSCredentials(accessKey, secretKey);
+            AmazonS3 s3 = new AmazonS3Client(myCredentials);
+            ObjectListing objects = s3.listObjects(new ListObjectsRequest().withBucketName(bucketName).withPrefix(fileName));
+            for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) {
+                if (objectSummary.getKey().startsWith(fileName)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }