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UsageGuide
Sardine is a next generation WebDAV client for Java. It is intended to be simple to use and does not implement the full WebDAV client specification (although a good amount is covered). Instead, the goal is to provide methods for most use case scenarios when working with a webdav server. The code needs to run as fast as possible and use the latest released Apache HttpComponents.
Sardine lives in the Central Repository now.
<dependency>
<groupId>com.github.lookfirst</groupId>
<artifactId>sardine</artifactId>
<version>5.10</version>
</dependency>
Performing a release is done with: mvn clean deploy; mvn release:clean; mvn release:prepare; mvn release:perform
To use Sardine, you first call SardineFactory.begin() or if you have HTTP authentication enabled on your webdav server: SardineFactory.begin(username, password). This will give you an instance of the Sardine interface. Note: once you begin() with a username/password, all method calls on the Sardine interface will use that same credentials.
Alternatively you can also directly instantiate the SardineImpl class with the option to pass your own preconfigured HttpClientBuilder instance.
By default, Sardine uses SSLSocketFactory.getSocketFactory() to support HTTPS requests. For customized SSL use, you can override a SardineImpl#createDefaultSecureSocketFactory() or provide your own configured HTTP client instance.
String keyStoreFilename = "/tmp/mystore";
File keystoreFile = new File(keyStoreFilename);
FileInputStream fis = new FileInputStream(keystoreFile);
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); // JKS
keyStore.load(fis, null);
final SSLSocketFactory socketFactory = new SSLSocketFactory(keyStore);
Sardine sardine = new SardineImpl() {
@Override
protected SSLSocketFactory createDefaultSecureSocketFactory() {
return socketFactory;
}
};Because SSLSocketFactory is Deprecated, it is recommended to use SSLConnectionSocketFactory. For example, you can use the following code to test:
import com.github.sardine.DavResource;
import com.github.sardine.Sardine;
import com.github.sardine.impl.SardineImpl;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.ssl.SSLContexts;
import org.junit.jupiter.api.Test;
import javax.net.ssl.SSLContext;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.*;
import java.security.cert.CertificateException;
import java.util.List;
public class SardineTest {
@Test
public void cloudWebdavTest2() throws IOException, KeyStoreException, CertificateException, NoSuchAlgorithmException, UnrecoverableKeyException, KeyManagementException {
String keyStoreFilename = "/tmp/keystore.jks"; // replace the value with your jks path
File keystoreFile = new File(keyStoreFilename);
FileInputStream fis = new FileInputStream(keystoreFile);
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); // JKS
keyStore.load(fis, "your password for keystore".toCharArray());
SSLContext sslcontext = SSLContexts.custom()
.loadTrustMaterial(keyStore, new TrustSelfSignedStrategy())
.build();
final SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslcontext);
Sardine sardine = new SardineImpl("your username for webdav server", "your password for webdav server") {
@Override
protected SSLConnectionSocketFactory createDefaultSecureSocketFactory() {
return socketFactory;
}
};
List<DavResource> resources = sardine.list("http://your webdave server");
for (DavResource res : resources)
{
System.out.println(res);
}
}
}For customized proxy use, you can pass a ProxySelector into the methods on SardineFactory.
If you would like to specify a port number to connect different from port 80 (HTTP) and 443 (HTTPS), just must override SardineImpl#createDefaultSchemeRegistry() or provide your own configured HTTP client instance by instantiating SardineImpl#SardineImpl(org.apache.http.impl.client.HttpClientBuilder) directly.
Sardine uses the HttpComponents ThreadSafeClientConnManager. This means that you can safely use an instance of Sardine in a multithreaded environment. However, be aware that the default values for ThreadSafeClientConnManager may not support enough concurrency for your environment. Therefore, it is probably safer to just call begin() each time you want to call methods on Sardine. If enough demand warrants it, I'd consider providing a way to tune these values.
When passing credentials to the client using Sardine.setCredentials(String username, String password), the authentication scope is configured for Basic, Digest and NTLM authentication to respond to the challenge of the server.
If you are using streaming put() and the server is requiring you to authenticate first, then you most likely will need to enable preemptive authentication so that the HttpClient sends authentication with every request.
When enabling preemptive authentication using Sardine.enablePreemptiveAuthentication(String host), sending an authentication header before any challenge received by the server. Only the Basic scheme is supported and a authentication failure is thrown when the server requests a different authentication scheme such as Digest. To disable the use from subsequent requests, use Sardine.disablePreemptiveAuthentication.
GZIP compression can be enabled using Sardine.enableCompression(). To disable the use from subsequent requests, use Sardine.disableCompression.
Below is the list of methods on the Sardine interface and example of how to use them. Each of these methods throw generic I/O exceptions or a SardineException for an unexpected server response code. SardineException has both the status code and message of the HTTP error response.
Please note, this is not a comprehensive list. There is many variations with different constructors. Consult the javadocs, source code or use your IDE to explore the API to find the method you need.
This returns a List of DavResource objects for a directory or a single DavResource for a file on a remote dav server. The URL should be properly encoded and must end with a "/" for a directory. The depth is an optional parameter that defaults to 1.
Sardine sardine = SardineFactory.begin();
List<DavResource> resources = sardine.list("http://yourdavserver.com/adirectory/");
for (DavResource res : resources)
{
System.out.println(res); // calls the .toString() method.
}This will get an InputStream reference to a remote file. Obviously you want to point at a file and not a directory for this one. The url should be properly encoded.
Sardine sardine = SardineFactory.begin("username", "password");
InputStream is = sardine.get("http://yourdavserver.com/adirectory/afile.jpg");This allows you to HTTP PUT a file up on a webdav server. Most likely you will want to pass in a username/password for this one unless the server is behind a firewall. =) It is also helpful to use the commons-io library to read the file from disk.
Sardine sardine = SardineFactory.begin("username", "password");
byte[] data = FileUtils.readFileToByteArray(new File("/file/on/disk"));
sardine.put("http://yourdavserver.com/adirectory/nameOfFile.jpg", data);Optionally, you may specify a Content-Type header value.
This allows you to HTTP PUT a file up on a webdav server. It takes an InputStream so that you don't have to buffer the entire file into memory first as a byte array.
Sardine sardine = SardineFactory.begin();
InputStream fis = new FileInputStream(new File("/some/file/on/disk.txt"));
sardine.put("http://yourdavserver.com/adirectory/nameOfFile.jpg", fis);Optionally, you may specify a Content-Type header value. Optionally, an Expect: Continue header is added to receive a possible error by the server before any data is sent.
See the note above about preemptive authentication if your server requires authentication and you are seeing errors.
This uses HTTP PUT to delete a resource on a webdav server. Most likely you will want to pass in a username/password for this one unless the server is behind a firewall. =)
Sardine sardine = SardineFactory.begin("username", "password");
sardine.delete("http://yourdavserver.com/adirectory/nameOfFile.jpg");This creates a directory on the remote server.
Sardine sardine = SardineFactory.begin("username", "password");
sardine.createDirectory("http://yourdavserver.com/adirectory/");This moves a file from one location to another on the remote server. It assumes you want to overwrite all files.
Sardine sardine = SardineFactory.begin("username", "password");
sardine.move("http://yourdavserver.com/adirectory/file1.jpg", "http://yourdavserver.com/adirectory/file2.jpg");This copies a file from one location to another on the remote server. It assumes you want to overwrite all files.
Sardine sardine = SardineFactory.begin("username", "password");
sardine.copy("http://yourdavserver.com/adirectory/file1.jpg", "http://yourdavserver.com/adirectory/file2.jpg");This uses a HTTP HEAD request to see if a file exists on the remote server.
Sardine sardine = SardineFactory.begin();
if (sardine.exists("http://yourdavserver.com/adirectory/file1.jpg"))
System.out.println("got here!");This uses a HTTP PROPPATCH request to add and/or remove custom properties on a file that exist on a remote server.
Sardine sardine = SardineFactory.begin();
String someUrl = "http://yourdavserver.com/adirectory/somefile.pdf";
// 1. Set custom properties on a resource:
Map<String,String> addProps = new HashMap<String,String>(2);
addProps.put("author", "J. Diamond");
addProps.put("title", "The Third Chimpanzee");
sardine.setCustomProps(someUrl, addProps, null);
// 2. Retrieve custom properties on a resource:
List<DavResource> resources = sardine.getResources(someUrl);
for (DavResource resource : resources) {
Map<String,String> customProps = resource.getCustomProps();
// Use custom properties...
String author = (String) customProps.get("author");
String title = (String) customProps.get("title");
}
// 3. Update and/or delete custom properties on a resource:
Map<String,String> updateProps = new HashMap<String,String>(1);
updateProps.put("author", "Jared Diamond");
List<String> removeProps = new ArrayList<String>(1);
removeProps.add("title");
sardine.setCustomProps(someUrl, updateProps, removeProps);