Examples of java.net.URLConnection.connect()

java.net.URLConnection.connect()
Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.
If the connect method is called when the connection has already been opened (indicated by the connected field having the value true), the call is ignored.
URLConnection objects go through two phases: first they are created, then they are connected. After being created, and before being connected, various options can be specified (e.g., doInput and UseCaches). After connecting, it is an error to try to set them. Operations that depend on being connected, like getContentLength, will implicitly perform the connection, if necessary. @throws SocketTimeoutException if the timeout expires beforethe connection can be established @exception IOException if an I/O error occurs while opening theconnection. @see java.net.URLConnection#connected @see #getConnectTimeout() @see #setConnectTimeout(int)

      for(int i = 0; i < urls.length; i++) {
        URLConnection conn = null;
        try {
          URL url = new URL(urls[i]);
          conn = url.openConnection();
          conn.connect();
        } catch (Exception e) {
          sb.append(" " + urls[i] + ": " + e);
          sb.append("\n");
          nConnectionErrs++;
        } finally {

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    public List<File> fetchFiles(URL serviceURL, File toDir) throws Exception
    {
        List<File> files = new ArrayList<File>();
        URLConnection conn = serviceURL.openConnection();
        conn.setDoOutput(false); // only true when POSTing
        conn.connect();
        // note, should check 'if (conn.getResponseCode() != 200) ...'
        
        // Ok, let's read it then... (note: StaxMate could simplify a lot!)
        InputStream in = conn.getInputStream();
        XMLStreamReader2 sr = (XMLStreamReader2) _xmlInputFactory.createXMLStreamReader(in);

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     */
    public Document convertDocument( URL url ) throws IOException
    {
        Document document = new Document();
        URLConnection connection = url.openConnection();
        connection.connect();
        // Add the url as a field named "url".  Use an UnIndexed field, so
        // that the url is just stored with the document, but is not searchable.
        addUnindexedField( document, "url", url.toExternalForm() );


        // Add the last modified date of the file a field named "modified".  Use a

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                if (log.isDebugEnabled()) {
                    log.debug("Cannot create a URLConnection for given URL : " + url);
                }
                return null;
            }
            connection.connect();
            inputStream = new BufferedInputStream(connection.getInputStream());
        } catch (IOException e) {
            return null;
        }

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    private long readDTM(URL url) throws Exception
    {
        URLConnection connection = url.openConnection();


        connection.connect();


        return connection.getLastModified();
    }


    private void createSynthComponentClass(String name) throws CannotCompileException, NotFoundException, IOException

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        }


        connection.setRequestProperty( "Pragma", "no-cache" );


        //connect to the remote site (may take some time)
        connection.connect();
        //next test for a 304 result (HTTP only)
        if ( connection instanceof HttpURLConnection )
        {
            HttpURLConnection httpConnection = (HttpURLConnection) connection;
            // although HTTPUrlConnection javadocs says FileNotFoundException should be

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            conn.setRequestProperty("Accept-Charset", "utf-8,*") ;
            conn.setDoInput(true) ;
            conn.setDoOutput(false) ;
            // Default is true.  See javadoc for HttpURLConnection
            //((HttpURLConnection)conn).setInstanceFollowRedirects(true) ;
            conn.connect() ;
            InputStream in = new BufferedInputStream(conn.getInputStream());
            
            if ( FileManager.logAllLookups  && log.isTraceEnabled() )
                log.trace("Found: "+filenameOrURI) ;
            return new TypedStream(in, conn.getContentType()) ;

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                    log.warn("Unexpected response code while validating repository ("+result+" "+con.getResponseMessage()+").  Assuming you know what you're doing.");
                }
                con.disconnect();
            } else {
                try {
                    urlConnection.connect();
                    InputStream in = urlConnection.getInputStream();
                    in.read();
                    in.close();
                } catch (IOException e) {
                    response.setRenderParameter("repoError", "Not a valid repository; no plugin list found at "+test);

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        URL url = new URL(target);


        URLConnection connection = url.openConnection();


        assertTrue(connection instanceof HttpURLConnection);
        connection.connect();
        InputStream in = connection.getInputStream();
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        IOUtils.copy(in, buffer);
        return buffer.toString();
    }

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     */
    public static URLType getType(URL url) throws IOException {
        if (url.toString().endsWith("/")) {
            URL metaInfURL = new URL(url, MANIFEST_LOCATION);
            URLConnection urlConnection = metaInfURL.openConnection();
            urlConnection.connect();
            try {
                InputStream is = urlConnection.getInputStream();
                is.close();
                return UNPACKED_ARCHIVE;
            } catch (IOException e) {

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