/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.jclouds.examples.rackspace.cloudfiles;
import static org.jclouds.examples.rackspace.cloudfiles.Constants.CONTAINER;
import static org.jclouds.examples.rackspace.cloudfiles.Constants.PROVIDER;
import static org.jclouds.examples.rackspace.cloudfiles.Constants.REGION;
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import org.jclouds.ContextBuilder;
import org.jclouds.blobstore.BlobStore;
import org.jclouds.blobstore.domain.Blob;
import org.jclouds.domain.Location;
import org.jclouds.domain.LocationBuilder;
import org.jclouds.domain.LocationScope;
import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.HttpResponseException;
import org.jclouds.io.Payload;
import org.jclouds.io.Payloads;
import org.jclouds.openstack.swift.v1.blobstore.RegionScopedBlobStoreContext;
import com.google.common.io.ByteSource;
import com.google.common.io.Closeables;
import com.google.common.io.Files;
/**
* The Temporary URL feature (TempURL) allows you to create limited-time Internet addresses which allow you to grant
* limited access to your Cloud Files account. Using TempURL, you may allow others to retrieve or place objects in
* your Cloud Files account for as long or as short a time as you wish. Access to the TempURL is independent of
* whether or not your account is CDN-enabled. And even if you don't CDN-enable a directory, you can still grant
* temporary public access through a TempURL.
*
* This feature is useful if you want to allow a limited audience to download a file from your Cloud Files account or
* website. You can give out the TempURL and know that after a specified time, no one will be able to access your
* object through the address. Or, if you want to allow your audience to upload objects into your Cloud Files account,
* you can give them a TempURL. After the specified time expires, no one will be able to upload to the address.
*
* Additionally, you need not worry about time running out when someone downloads a large object. If the time expires
* while a file is being retrieved, the download will continue until it is finished. Only the link will expire.
*
*/
public class GenerateTempURL implements Closeable {
private static final String FILENAME = "object.txt";
private static final int TEN_MINUTES = 10 * 60;
private final BlobStore blobStore;
private final RegionScopedBlobStoreContext blobStoreContext;
/**
* To get a username and API key see http://jclouds.apache.org/guides/rackspace/
*
* The first argument (args[0]) must be your username
* The second argument (args[1]) must be your API key
*/
public static void main(String[] args) throws IOException {
GenerateTempURL generateTempURL = new GenerateTempURL(args[0], args[1]);
try {
generateTempURL.createContainer();
generateTempURL.generatePutTempURL();
generateTempURL.generateGetTempURL();
generateTempURL.generateDeleteTempURL();
}
catch (Exception e) {
e.printStackTrace();
}
finally {
generateTempURL.close();
}
}
public GenerateTempURL(String username, String apiKey) {
blobStoreContext = ContextBuilder.newBuilder(PROVIDER)
.credentials(username, apiKey)
.buildView(RegionScopedBlobStoreContext.class);
blobStore = blobStoreContext.getBlobStore(REGION);
}
private void createContainer() throws IOException {
// Ensure that the container exists
Location location = new LocationBuilder().scope(LocationScope.REGION).id(REGION).description("region").build();
if (!blobStore.containerExists(CONTAINER)) {
blobStore.createContainerInLocation(location, CONTAINER);
System.out.format("Created container in %s%n", REGION);
}
}
private void generatePutTempURL() throws IOException {
System.out.format("Generate PUT Temp URL%n");
// Create the Payload
String data = "This object will be public for 10 minutes.";
ByteSource source = ByteSource.wrap(data.getBytes());
Payload payload = Payloads.newByteSourcePayload(source);
// Create the Blob
Blob blob = blobStore.blobBuilder(FILENAME).payload(payload).contentType("text/plain").build();
HttpRequest request = blobStoreContext.getSigner(REGION).signPutBlob(CONTAINER, blob, TEN_MINUTES);
System.out.format(" %s %s%n", request.getMethod(), request.getEndpoint());
// PUT the file using jclouds
HttpResponse response = blobStoreContext.utils().http().invoke(request);
int statusCode = response.getStatusCode();
if (statusCode >= 200 && statusCode < 299) {
System.out.format(" PUT Success (%s)%n", statusCode);
}
else {
throw new HttpResponseException(null, response);
}
}
private void generateGetTempURL() throws IOException {
System.out.format("Generate GET Temp URL%n");
HttpRequest request = blobStoreContext.getSigner(REGION).signGetBlob(CONTAINER, FILENAME, TEN_MINUTES);
System.out.format(" %s %s%n", request.getMethod(), request.getEndpoint());
// GET the file using jclouds
File file = File.createTempFile(FILENAME, ".tmp");
Payload payload = blobStoreContext.utils().http().invoke(request).getPayload();
try {
Files.asByteSink(file).writeFrom(payload.openStream());
System.out.format(" GET Success (%s)%n", file.getAbsolutePath());
} finally {
payload.release();
file.delete();
}
}
private void generateDeleteTempURL() throws IOException {
System.out.format("Generate DELETE Temp URL%n");
HttpRequest request = blobStoreContext.getSigner(REGION).signRemoveBlob(CONTAINER, FILENAME);
System.out.format(" %s %s%n", request.getMethod(), request.getEndpoint());
// DELETE the file using jclouds
HttpResponse response = blobStoreContext.utils().http().invoke(request);
int statusCode = response.getStatusCode();
if (statusCode >= 200 && statusCode < 299) {
System.out.format(" DELETE Success (%s)%n", statusCode);
}
else {
throw new HttpResponseException(null, response);
}
}
/**
* Always close your service when you're done with it.
*/
public void close() throws IOException {
Closeables.close(blobStore.getContext(), true);
}
}