Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package screenieup; import java.awt.Toolkit; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.StringSelection; import java.awt.image.BufferedImage; import java.io.BufferedInputStream; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.io.StringWriter; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import java.util.zip.GZIPInputStream; import javax.imageio.ImageIO; import javax.net.ssl.SSLHandshakeException; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JProgressBar; import javax.swing.JTextField; import javax.swing.SwingWorker; import org.apache.commons.io.FilenameUtils; import org.json.JSONArray; import org.json.JSONObject; import screenieup.GUI; /** * @author Daniel Munkacsi */ public class MixtapeUpload { private final String MIXTAPE_POST_URI = "https://mixtape.moe/upload.php"; private final String tmpfiletype = "image/png"; private String filename; private String extension; private final String boundary = "----"; String mixtapeurl; private final JButton browserBtn; private final JTextField urlarea; private final String[] progressText; private final JLabel progressLabel; private final JProgressBar progressBar; private final JDialog progressDialog; public MixtapeUpload(JTextField ua, String[] pT, JLabel lbl, JProgressBar jpb, JDialog dlg, JButton btn) { urlarea = ua; progressText = pT; progressLabel = lbl; progressBar = jpb; progressBar.setMaximum(progressText.length); progressDialog = dlg; browserBtn = btn; } public void upload(File f) throws IOException { System.out.println("Preparing for upload..."); String fullname = f.getName(); extension = FilenameUtils.getExtension(fullname); filename = FilenameUtils.getBaseName(fullname); startUpload(fileToBytes(f)); } public void upload(BufferedImage imgToUpload) throws IOException { System.out.println("Preparing for upload..."); String fullname = "screenshot.png"; extension = FilenameUtils.getExtension(fullname); filename = FilenameUtils.getBaseName(fullname); startUpload(imageToBytes(imgToUpload)); } private void startUpload(byte[] b) { SwingWorker uploader; uploader = new SwingWorker<Void, Integer>() { @Override protected Void doInBackground() throws IOException { // not handled anywhere, do fix publish(0); publish(2); HttpURLConnection connection = connect(); publish(3); try { send(b, connection); } catch (SSLHandshakeException ex) { JOptionPane.showMessageDialog(null, "You need to add Let's Encrypt's certificates to your Java CA Certificate store."); return null; } publish(4); String response = getResponse(connection); System.out.println("response received: " + response); parseResponse(response); return null; } @Override protected void done() { publish(6); copyToClipBoard(mixtapeurl); publish(7); urlarea.setText(mixtapeurl); urlarea.setEnabled(true); browserBtn.setEnabled(true); new ListWriter("mixtape_links.txt").writeList("Image link: " + mixtapeurl, true); // true = append to file, false = overwrite JOptionPane.showMessageDialog(null, "Uploaded!\n" + "The image link has been copied to your clipboard!\nImage link has been logged to file."); progressDialog.dispose(); } @Override protected void process(List<Integer> chunks) { progressLabel.setText(progressText[chunks.get(chunks.size() - 1)]); // The last value in this array is all we care about. progressBar.setValue(chunks.get(chunks.size() - 1) + 1); } }; uploader.execute(); } private HttpURLConnection connect() throws IOException { System.out.println("Connecting to pomf..."); HttpURLConnection conn = null; URL url = null; try { url = new URL(MIXTAPE_POST_URI); } catch (MalformedURLException ex) { Logger.getLogger(PomfUpload.class.getName()).log(Level.SEVERE, null, ex); return null; } try { conn = (HttpURLConnection) url.openConnection(); } catch (IOException ex) { throw ex; } conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); try { conn.setRequestMethod("POST"); } catch (ProtocolException ex) { throw ex; } conn.setRequestProperty("Connection", "keep-alive"); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=----" + boundary); conn.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"); conn.setRequestProperty("Accept-Encoding", "gzip, deflate"); return conn; } private void send(byte[] b, HttpURLConnection conn) throws IOException { System.out.println("entered sendfile"); String introline = "------" + boundary; String padder = String.format("Content-Disposition: form-data; name=\"files[]\"; filename=\"" + filename + "." + extension + "\"\r\nContent-type: " + tmpfiletype + "\r\n"); String outroline = "------" + boundary + "--"; ByteArrayInputStream bais = new ByteArrayInputStream(b); DataOutputStream outstream; try { outstream = new DataOutputStream(conn.getOutputStream()); outstream.writeBytes(introline); outstream.writeBytes("\r\n"); outstream.writeBytes(padder); outstream.writeBytes("\r\n"); int i; while ((i = bais.read()) > -1) { outstream.write(i); } bais.close(); outstream.writeBytes("\r\n"); outstream.writeBytes("\r\n"); outstream.writeBytes(outroline); outstream.flush(); outstream.close(); } catch (IOException ex) { if (ex instanceof SSLHandshakeException) { ex.printStackTrace(); JOptionPane.showMessageDialog(null, "You need to add Let's Encrypt's certificates to your Java CA Certificate store."); } else { throw ex; } } } private String getResponse(HttpURLConnection conn) throws IOException { System.out.println("Waiting for response..."); String response = "No response received, or something has gone wrong."; String charset = "UTF-8"; InputStream gzippedResponse = conn.getInputStream(); InputStream ungzippedResponse = new GZIPInputStream(gzippedResponse); Reader reader = new InputStreamReader(ungzippedResponse, charset); StringWriter writer = new StringWriter(); char[] buffer = new char[10240]; for (int length = 0; (length = reader.read(buffer)) > 0;) { writer.write(buffer, 0, length); } response = writer.toString(); writer.close(); reader.close(); reader.close(); return response; } /** * Parse the response to get the image link. * @param response the image link resulting from the upload */ private void parseResponse(String response) { JSONObject outerjson = new JSONObject(response); JSONArray jsnarray = (JSONArray) outerjson.get("files"); JSONObject innerjson = (JSONObject) jsnarray.get(0); mixtapeurl = innerjson.get("url").toString(); } /** * Create a byte array from the dropped or pasted image. * @param img the image to be converted to byte array * @return the resulting byte array */ private byte[] imageToBytes(BufferedImage img) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { ImageIO.write(img, "jpg", baos); baos.flush(); byte[] imageInByte = baos.toByteArray(); baos.close(); return imageInByte; } catch (IOException ex) { Logger.getLogger(GUI.class.getName()).log(Level.SEVERE, null, ex); } return null; } /** * Convert the file to byte array. * This could be done in the GUI though, so the uploader can just have ONE upload method, * which takes a byte array, instead of having 2 methods , one of which takes a file, the other a byte array. * Improvements needed. * @param f the file to be written to a byte array * @return byte array containing file's data * @throws java.io.FileNotFoundException if file is not found while writing to bytes */ private byte[] fileToBytes(File f) throws FileNotFoundException, IOException { byte[] filebytes; try (ByteArrayOutputStream out = new ByteArrayOutputStream()) { BufferedInputStream in = new BufferedInputStream(new FileInputStream(f)); int read; byte[] buff = new byte[2048]; while ((read = in.read(buff)) > 0) { out.write(buff, 0, read); } filebytes = out.toByteArray(); out.flush(); } return filebytes; } /** * Copy upload link to clipboard. */ public void copyToClipBoard(String string) { Toolkit toolkit = Toolkit.getDefaultToolkit(); Clipboard clipboard = toolkit.getSystemClipboard(); StringSelection selection = new StringSelection(string); clipboard.setContents(selection, null); System.out.println("Image URL copied to clipboard."); } }