283 lines
9.7 KiB
Java
283 lines
9.7 KiB
Java
package org.gcube.dataanalysis.seadatanet;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.DataOutputStream;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.StringReader;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLConnection;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import org.gcube.contentmanagement.lexicalmatcher.utils.AnalysisLogger;
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import org.gcube.dataanalysis.ecoengine.configuration.AlgorithmConfiguration;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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public class DivaHTTPClient {
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public static String WEB_HTTP="http://gher-diva.phys.ulg.ac.be/web-vis/Python/web";
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public static String DOWN_FILE_NC="/download?fieldname=";
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public static String postFile(File file) throws Exception {
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String crlf = "\r\n";
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String twoHyphens = "--";
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String boundary = "*****";
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HttpURLConnection httpUrlConnection = null;
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try {
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URL url = new URL(WEB_HTTP+"/upload");
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httpUrlConnection = (HttpURLConnection) url.openConnection();
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httpUrlConnection.setUseCaches(false);
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httpUrlConnection.setDoOutput(true);
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httpUrlConnection.setRequestMethod("POST");
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httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
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httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
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httpUrlConnection.setRequestProperty(
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"Content-Type", "multipart/form-data;boundary=" + boundary);
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DataOutputStream request = new DataOutputStream(
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httpUrlConnection.getOutputStream());
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request.writeBytes("--" + boundary + crlf);
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request.writeBytes("Content-Disposition: form-data; name=\"data" + "\";filename=\"" +
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file.getName() + "\"" + crlf);
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request.writeBytes(crlf);
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BufferedReader reader = new BufferedReader(new FileReader(file));
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String lineString = reader.readLine();
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while (lineString!=null) {
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request.writeBytes(lineString+"\n");
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lineString = reader.readLine();
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}
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reader.close();
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request.writeBytes(crlf);
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request.writeBytes(twoHyphens + boundary +
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twoHyphens + crlf);
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request.flush();
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request.close();
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InputStream responseStream = new
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BufferedInputStream(httpUrlConnection.getInputStream());
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BufferedReader responseStreamReader =
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new BufferedReader(new InputStreamReader(responseStream));
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String line = "";
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StringBuilder stringBuilder = new StringBuilder();
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while ((line = responseStreamReader.readLine()) != null) {
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stringBuilder.append(line).append("\n");
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}
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responseStreamReader.close();
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String response = stringBuilder.toString();
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responseStream.close();
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httpUrlConnection.disconnect();
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return response;
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} catch (IOException e) {
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throw new Exception(e);
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} finally {
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if (httpUrlConnection != null)
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httpUrlConnection.disconnect();
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}
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}
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/**
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* sessionid
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id from previous upload
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len
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correlation length (arc degrees)
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stn
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signal to noise ratio (non-dimensional)
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x0,x1,dx
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first and last longitude values and resolution of the grid
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y0,y1,dy
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idem for latitude
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level
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depth level
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*/
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public static DivaAnalysisGetResponse getAnalysis (String id,double len,double stn,double x0,double x1, double dx,double y0,double y1,double dy,double level) throws Exception {
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HttpURLConnection httpUrlConnection = null;
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try {
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String get_url=WEB_HTTP+"/make_analysis?";
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get_url+="sessionid="+id+"&";
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get_url+="len="+len+"&";
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get_url+="stn="+stn+"&";
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get_url+="x0="+x0+"&";
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get_url+="x1="+x1+"&";
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get_url+="dx="+dx+"&";
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get_url+="y0="+y0+"&";
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get_url+="y1="+y1+"&";
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get_url+="dy="+dy+"&";
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get_url+="level="+level+"";
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//System.out.println("GET URL="+get_url);
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URL url = new URL(get_url);
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httpUrlConnection = (HttpURLConnection) url.openConnection();
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httpUrlConnection.setUseCaches(false);
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httpUrlConnection.setDoOutput(true);
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httpUrlConnection.setRequestMethod("GET");
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httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
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httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
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InputStream responseStream = new
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BufferedInputStream(httpUrlConnection.getInputStream());
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BufferedReader responseStreamReader =
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new BufferedReader(new InputStreamReader(responseStream));
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String line = "";
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StringBuilder stringBuilder = new StringBuilder();
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while ((line = responseStreamReader.readLine()) != null) {
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stringBuilder.append(line).append("\n");
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}
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responseStreamReader.close();
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String response = stringBuilder.toString();
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//System.out.println("RESPONSE STRING: "+response);
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AnalysisLogger.getLogger().debug("Response from DIVA Analysis: \n"+response);
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Document doc = loadXMLFromString(response);
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Node idNode = doc.getElementsByTagName("result").item(0);
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String identifier = idNode.getAttributes().item(0).getNodeValue();
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Double vmin = Double.parseDouble(doc.getElementsByTagName("stat").item(0).getTextContent());
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Double vmax = Double.parseDouble(doc.getElementsByTagName("stat").item(1).getTextContent());
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Double stat_obs_count_used = Double.parseDouble(doc.getElementsByTagName("stat").item(2).getTextContent());
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Double stat_posteriori_stn = Double.parseDouble(doc.getElementsByTagName("stat").item(3).getTextContent());
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responseStream.close();
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httpUrlConnection.disconnect();
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return new DivaAnalysisGetResponse(identifier, vmin, vmax, stat_obs_count_used, stat_posteriori_stn);
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} catch (IOException e) {
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throw new Exception(e);
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} finally {
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if (httpUrlConnection != null)
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httpUrlConnection.disconnect();
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}
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}
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public static DivaFilePostResponse uploadFile(File file) throws Exception, IOException, ParserConfigurationException, SAXException
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{
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String result_xml = null;
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try {
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result_xml = postFile(file);
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} catch (Exception e) {
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e.printStackTrace();
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}
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if (result_xml == null) {
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throw new SAXException("Error in HTTP response no response element found!");
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}
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//Create Document object by XMLResponse
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Document doc = loadXMLFromString(result_xml);
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//Print XML Response
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AnalysisLogger.getLogger().debug("DIVA XML Response: \n"+result_xml);
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Node root = doc.getDocumentElement();
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if(root== null) throw new SAXException("Error in HTTP response no root element found!");
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Integer obs_count= null;
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try{
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obs_count=Integer.parseInt(root.getChildNodes().item(1).getTextContent());
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}catch(NullPointerException pe ){
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throw new Exception("Error in uploading file to DIVA!");
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}
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Double obs_x0=Double.parseDouble(root.getChildNodes().item(3).getTextContent());
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Double obs_x1=Double.parseDouble(root.getChildNodes().item(5).getTextContent());
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Double obs_y0=Double.parseDouble(root.getChildNodes().item(7).getTextContent());
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Double obs_y1=Double.parseDouble(root.getChildNodes().item(9).getTextContent());
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Double obs_v0=Double.parseDouble(root.getChildNodes().item(11).getTextContent());
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Double obs_v1=Double.parseDouble(root.getChildNodes().item(13).getTextContent());
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String sessionid=root.getChildNodes().item(15).getTextContent();
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return new DivaFilePostResponse(obs_x0, obs_x1, obs_y0, obs_y1, obs_v0, obs_v1, obs_count, sessionid);
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}
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public static void downloadFileDiva(String fileid, String destinationFile) throws Exception{
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try {
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String fileurl = DivaHTTPClient.WEB_HTTP + DivaHTTPClient.DOWN_FILE_NC + fileid;
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URL smpFile = new URL(fileurl);
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URLConnection uc = (URLConnection) smpFile.openConnection();
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InputStream is = uc.getInputStream();
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AnalysisLogger.getLogger().debug("Retrieving DIVA file from " + fileurl + " to :" + destinationFile);
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inputStreamToFile(is, destinationFile);
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is.close();
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} catch (Exception e) {
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throw e;
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}
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}
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public static void inputStreamToFile(InputStream is, String path) throws FileNotFoundException, IOException {
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FileOutputStream out = new FileOutputStream(new File(path));
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byte buf[] = new byte[1024];
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int len = 0;
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while ((len = is.read(buf)) > 0)
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out.write(buf, 0, len);
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out.close();
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}
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public static void main(String[] args) throws Exception {
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AnalysisLogger.setLogger("cfg/"+AlgorithmConfiguration.defaultLoggerFile);
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DivaFilePostResponse response=uploadFile(new File("resources"+File.separator+"files"+File.separator+"temperature_argo.txt"));
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//System.out.println(getAnalysis(response.getSessionid(),5,4,76,78,1,35,78,1,2));
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System.out.println(""+response);
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DivaAnalysisGetResponse respAnalysis = getAnalysis(response.getSessionid(),10, 0.8, -180, 180, 3, -80, 80, 3, 1);
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System.out.println("Response: "+respAnalysis.toString());
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//Downloader downFileNC = new Downloader();
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//System.out.println(System.getProperty("user.dir")+File.separator+"temp.nc");
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File f=new File(System.getProperty("user.dir")+File.separator+"temp.nc");
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if(!f.exists()) f.createNewFile();
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downloadFileDiva(WEB_HTTP+DOWN_FILE_NC+
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respAnalysis.getIdentifier(),System.getProperty("user.dir")+File.separator+"temp.nc");
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}
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//PARSER XML
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private static Document loadXMLFromString(String xml) throws ParserConfigurationException, SAXException, IOException
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{
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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DocumentBuilder builder = factory.newDocumentBuilder();
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InputSource is = new InputSource(new StringReader(xml));
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return builder.parse(is);
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}
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}
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