Java Example - Upload Contribution

UploadContribution.java

package com.indicee.api.examples;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.NoSuchAlgorithmException;

import javax.net.ssl.SSLContext;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.InputStreamBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.SingleClientConnManager;
import org.w3c.dom.Document;

public class UploadContribution {
	
	private static final String HOST            = "https://secure.indicee.com";
	private static final String CONSUMER_KEY    = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX";
	private static final String CONSUMER_SECRET = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
	private static final String TOKEN_KEY       = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX";
	private static final String TOKEN_SECRET    = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
	private static final String DATA_SET_IQN    = "iqn.2://indicee.com/{user_id}/{space_id}/dataModel/dataSets/{dataset_name}";
	private static final String FILE_PATH       = "/path/to/file";

	public static void main(String[] args) throws Exception {
        CommonsHttpOAuthConsumer commonsHttpConsumer = new CommonsHttpOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
        commonsHttpConsumer.setTokenWithSecret(TOKEN_KEY, TOKEN_SECRET);
        
        String path = "/api/contributions/v3/upload.xml";
        File file = new File(FILE_PATH);
        
		DefaultHttpClient httpClient = createHttpClient();

        HttpPost httpPost = new HttpPost(HOST + path);
        
        
        // build post data. File upload needs multipart form data.
        MultipartEntity mentity = new MultipartEntity();
 
        mentity.addPart("file",         new InputStreamBody(new FileInputStream(file), file.getName()));
        mentity.addPart("dataSetQname", new StringBody(DATA_SET_IQN));
        httpPost.setEntity(mentity);
        
        
        commonsHttpConsumer.sign(httpPost);

        
        // send the data to get the response
        HttpResponse httpResponse = httpClient.execute(httpPost);
        int status = httpResponse.getStatusLine().getStatusCode();
        if (status != 200) {
            throw new Exception("Error making call: " + path);
        }
        
        InputStream is = httpResponse.getEntity().getContent();
        Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(is);   
        documentToStream(document, System.out);
	}

	private static DefaultHttpClient createHttpClient() throws Exception {
		SchemeRegistry registry = new SchemeRegistry();

		registry.register(new Scheme("http", 80, PlainSocketFactory.getSocketFactory()));

		try {
			SSLSocketFactory sf = new SSLSocketFactory(SSLContext.getDefault(),
					SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
			registry.register(new Scheme("https", 443, sf));
		} catch (NoSuchAlgorithmException e) {
			throw new Exception("Problem creating ssl connection", e);
		}

		ClientConnectionManager conman = new SingleClientConnManager(registry);
		DefaultHttpClient httpClient = new DefaultHttpClient(conman);
		return httpClient;
	}
	
	private static void documentToStream(Document document, OutputStream outputStream) {

		try {
			Transformer transformer = TransformerFactory.newInstance().newTransformer();
			transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
			transformer.setOutputProperty(OutputKeys.INDENT, "yes");
			transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", Integer.toString(2));
			Result result = new StreamResult(outputStream);
			Source source = new DOMSource(document);
			transformer.transform(source, result);
		} catch (TransformerException e) {
			throw new RuntimeException(e);
		}
	}
}

Nice sample code, like the use of ContentBody and InputStreamBody