jaroslav@37: /**
jaroslav@358:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
jaroslav@37:  *
jaroslav@551:  * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.
jaroslav@37:  *
jaroslav@358:  * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
jaroslav@358:  * Other names may be trademarks of their respective owners.
jaroslav@37:  *
jaroslav@358:  * The contents of this file are subject to the terms of either the GNU
jaroslav@358:  * General Public License Version 2 only ("GPL") or the Common
jaroslav@358:  * Development and Distribution License("CDDL") (collectively, the
jaroslav@358:  * "License"). You may not use this file except in compliance with the
jaroslav@358:  * License. You can obtain a copy of the License at
jaroslav@358:  * http://www.netbeans.org/cddl-gplv2.html
jaroslav@358:  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
jaroslav@358:  * specific language governing permissions and limitations under the
jaroslav@358:  * License.  When distributing the software, include this License Header
jaroslav@358:  * Notice in each file and include the License file at
jaroslav@358:  * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
jaroslav@358:  * particular file as subject to the "Classpath" exception as provided
jaroslav@358:  * by Oracle in the GPL Version 2 section of the License file that
jaroslav@358:  * accompanied this code. If applicable, add the following below the
jaroslav@358:  * License Header, with the fields enclosed by brackets [] replaced by
jaroslav@358:  * your own identifying information:
jaroslav@358:  * "Portions Copyrighted [year] [name of copyright owner]"
jaroslav@358:  *
jaroslav@358:  * Contributor(s):
jaroslav@358:  *
jaroslav@358:  * The Original Software is NetBeans. The Initial Developer of the Original
jaroslav@551:  * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.
jaroslav@358:  *
jaroslav@358:  * If you wish your version of this file to be governed by only the CDDL
jaroslav@358:  * or only the GPL Version 2, indicate your decision by adding
jaroslav@358:  * "[Contributor] elects to include this software in this distribution
jaroslav@358:  * under the [CDDL or GPL Version 2] license." If you do not indicate a
jaroslav@358:  * single choice of license, a recipient has the option to distribute
jaroslav@358:  * your version of this file under either the CDDL, the GPL Version 2 or
jaroslav@358:  * to extend the choice of license to its licensees as provided above.
jaroslav@358:  * However, if you add GPL Version 2 code and therefore, elected the GPL
jaroslav@358:  * Version 2 license, then the option applies only if the new code is
jaroslav@358:  * made subject to such option by the copyright holder.
jaroslav@37:  */
jtulach@1057: package org.netbeans.html.xhr4j;
jaroslav@37: 
jaroslav@37: import java.io.IOException;
jaroslav@60: import java.io.InputStream;
jaroslav@37: import java.io.InputStreamReader;
jaroslav@75: import java.io.OutputStream;
jaroslav@37: import java.io.PushbackInputStream;
jaroslav@37: import java.io.Reader;
jtulach@1057: import java.io.UnsupportedEncodingException;
jaroslav@74: import java.net.HttpURLConnection;
jaroslav@37: import java.net.URL;
jaroslav@74: import java.net.URLConnection;
jtulach@1057: import java.util.concurrent.Callable;
jaroslav@37: import java.util.concurrent.Executor;
jaroslav@37: import java.util.concurrent.Executors;
jaroslav@158: import java.util.concurrent.ThreadFactory;
jaroslav@37: import java.util.logging.Logger;
jaroslav@131: import net.java.html.js.JavaScriptBody;
jtulach@940: import org.netbeans.html.json.spi.JSONCall;
jaroslav@37: 
jaroslav@54: /** This is an implementation package - just
jaroslav@54:  * include its JAR on classpath and use official {@link Context} API
jaroslav@54:  * to access the functionality.
jaroslav@37:  *
jtulach@790:  * @author Jaroslav Tulach
jaroslav@37:  */
jaroslav@37: final class LoadJSON implements Runnable {
jaroslav@446:     private static final Logger LOG = Logger.getLogger(LoadJSON.class.getName());
jaroslav@158:     private static final Executor REQ = Executors.newCachedThreadPool(new ThreadFactory() {
jaroslav@158:         @Override
jaroslav@158:         public Thread newThread(Runnable runnable) {
jaroslav@158:             Thread thread = Executors.defaultThreadFactory().newThread(runnable);
jaroslav@158:             thread.setDaemon(true);
jtulach@1057:             thread.setName("xhr4j daemon");
jaroslav@158:             return thread;
jaroslav@158:         }
jaroslav@158:     });
jaroslav@37: 
jaroslav@37:     private final JSONCall call;
jaroslav@37:     private final URL base;
jaroslav@37: 
jaroslav@37: 
jaroslav@37:     private LoadJSON(JSONCall call) {
jaroslav@37:         this.call = call;
jaroslav@446:         this.base = null;
jaroslav@37:     }
jaroslav@37: 
jaroslav@37:     public static void loadJSON(JSONCall call) {
jaroslav@258:         assert !"WebSocket".equals(call.getMethod());
jaroslav@258:         REQ.execute(new LoadJSON((call)));
jaroslav@37:     }
jaroslav@37: 
jaroslav@37:     @Override
jaroslav@37:     public void run() {
jaroslav@37:         final String url;
jaroslav@446:         Throwable error = null;
jaroslav@446:         Object json = null;
jtulach@940: 
jaroslav@37:         if (call.isJSONP()) {
jaroslav@37:             url = call.composeURL("dummy");
jaroslav@37:         } else {
jaroslav@37:             url = call.composeURL(null);
jaroslav@37:         }
jaroslav@37:         try {
jaroslav@37:             final URL u = new URL(base, url.replace(" ", "%20"));
jaroslav@74:             URLConnection conn = u.openConnection();
jaroslav@527:             if (call.isDoOutput()) {
jaroslav@527:                 conn.setDoOutput(true);
jaroslav@527:             }
jtulach@940:             String h = call.getHeaders();
jtulach@940:             if (h != null) {
jtulach@940:                 int pos = 0;
jtulach@940:                 while (pos < h.length()) {
jtulach@940:                     int tagEnd = h.indexOf(':', pos);
jtulach@940:                     if (tagEnd == -1) {
jtulach@940:                         break;
jtulach@940:                     }
jtulach@940:                     int r = h.indexOf('\r', tagEnd);
jtulach@940:                     int n = h.indexOf('\n', tagEnd);
jtulach@940:                     if (r == -1) {
jtulach@940:                         r = h.length();
jtulach@940:                     }
jtulach@940:                     if (n == -1) {
jtulach@940:                         n = h.length();
jtulach@940:                     }
jtulach@940:                     String key = h.substring(pos, tagEnd).trim();
jtulach@940:                     String val = h.substring(tagEnd + 1, Math.min(r, n)).trim();
jtulach@940:                     conn.setRequestProperty(key, val);;
jtulach@940:                     pos = Math.max(r, n);
jtulach@940:                 }
jtulach@940:             }
jaroslav@527:             if (call.getMethod() != null && conn instanceof HttpURLConnection) {
jaroslav@527:                 ((HttpURLConnection) conn).setRequestMethod(call.getMethod());
jaroslav@527:             }
jaroslav@527:             if (call.isDoOutput()) {
jaroslav@527:                 final OutputStream os = conn.getOutputStream();
jaroslav@527:                 call.writeData(os);
jaroslav@527:                 os.flush();
jaroslav@74:             }
jaroslav@74:             final PushbackInputStream is = new PushbackInputStream(
jaroslav@74:                 conn.getInputStream(), 1
jaroslav@74:             );
jtulach@745:             boolean[] arrayOrString = { false, false };
jtulach@745:             detectJSONType(call.isJSONP(), is, arrayOrString);
jtulach@1057:             String response = readStream(is);
jtulach@1057:             if (call.isJSONP()) {
jtulach@1057:                 response = '(' + response;
jaroslav@73:             }
jtulach@1057:             json = new Result(response, arrayOrString[0], arrayOrString[1]);
jaroslav@73:         } catch (IOException ex) {
jaroslav@37:             error = ex;
jaroslav@37:         } finally {
jaroslav@446:             if (error != null) {
jaroslav@446:                 call.notifyError(error);
jaroslav@446:             } else {
jaroslav@446:                 call.notifySuccess(json);
jaroslav@446:             }
jaroslav@37:         }
jaroslav@37:     }
jaroslav@37: 
jtulach@1057:     private static final class Result implements Callable<Object> {
jtulach@1057:         private final String response;
jtulach@1057:         private final boolean array;
jtulach@1057:         private final boolean plain;
jtulach@1057: 
jtulach@1057:         Result(String response, boolean array, boolean plain) {
jtulach@1057:             this.response = response;
jtulach@1057:             this.array = array;
jtulach@1057:             this.plain = plain;
jtulach@1057:         }
jtulach@1057: 
jtulach@1057:         @Override
jtulach@1057:         public Object call() throws Exception {
jtulach@1057:             if (plain) {
jtulach@1057:                 return response;
jtulach@1057:             } else {
jtulach@1057:                 if (array) {
jtulach@1057:                     Object r = parse(response);
jtulach@1057:                     Object[] arr = r instanceof Object[] ? (Object[])r : new Object[] { r };
jtulach@1057:                     for (int i = 0; i < arr.length; i++) {
jtulach@1057:                         arr[i] = new JSObjToStr(response, arr[i]);
jtulach@1057:                     }
jtulach@1057:                     return arr;
jtulach@1057:                 } else {
jtulach@1057:                     return new JSObjToStr(response, parse(response));
jtulach@1057:                 }
jtulach@1057:             }
jtulach@1057:         }
jtulach@1057:     }
jtulach@1057:     private static final class JSObjToStr {
jtulach@1057:         final String str;
jtulach@1057:         final Object obj;
jtulach@1057: 
jtulach@1057:         public JSObjToStr(Object str, Object obj) {
jtulach@1057:             this.str = str == null ? "" : str.toString();
jtulach@1057:             this.obj = obj;
jtulach@1057:         }
jtulach@1057: 
jtulach@1057:         @Override
jtulach@1057:         public String toString() {
jtulach@1057:             return str;
jtulach@1057:         }
jtulach@1057:     }
jtulach@1057: 
jtulach@1057:     static String readStream(InputStream is) throws IOException, UnsupportedEncodingException {
jtulach@1057:         Reader r = new InputStreamReader(is, "UTF-8");
jtulach@1057:         StringBuilder sb = new StringBuilder();
jtulach@1057:         char[] arr = new char[4096];
jtulach@1057:         for (;;) {
jtulach@1057:             int len = r.read(arr);
jtulach@1057:             if (len == -1) {
jtulach@1057:                 break;
jtulach@1057:             }
jtulach@1057:             sb.append(arr, 0, len);
jtulach@1057:         }
jtulach@1057:         return sb.toString();
jtulach@1057:     }
jtulach@1057: 
jtulach@745:     private static void detectJSONType(boolean skipAnything, final PushbackInputStream is, boolean[] arrayOrString) throws IOException {
jtulach@745:         for (;;) {
jtulach@745:             int ch = is.read();
jtulach@745:             if (ch == -1) {
jtulach@745:                 arrayOrString[1] = true;
jtulach@745:                 break;
jtulach@745:             }
jtulach@745:             if (Character.isWhitespace(ch)) {
jtulach@745:                 continue;
jtulach@745:             }
jtulach@745: 
jtulach@745:             if (ch == '[') {
jtulach@745:                 is.unread(ch);
jtulach@745:                 arrayOrString[0] = true;
jtulach@745:                 break;
jtulach@745:             }
jtulach@745:             if (ch == '{') {
jtulach@745:                 is.unread(ch);
jtulach@745:                 break;
jtulach@745:             }
jtulach@745:             if (!skipAnything) {
jtulach@745:                 is.unread(ch);
jtulach@745:                 arrayOrString[1] = true;
jtulach@745:                 break;
jtulach@745:             }
jtulach@745:         }
jtulach@745:     }
jtulach@745: 
jaroslav@446:     @JavaScriptBody(args = {"object", "property"},
jtulach@1057:         body
jtulach@1057:         = "if (property === null) return object;\n"
jtulach@1057:         + "if (object === null) return null;\n"
jtulach@1057:         + "var p = object[property]; return p ? p : null;"
jaroslav@446:     )
jaroslav@446:     private static Object getProperty(Object object, String property) {
jaroslav@446:         return null;
jaroslav@446:     }
jtulach@940: 
jtulach@1057:     @JavaScriptBody(args = {"s"}, body = "return eval('(' + s + ')');")
jtulach@1057:     static Object parse(String s) {
jtulach@1057:         throw new IllegalStateException("No parser context for " + s);
jtulach@1057:     }
jtulach@1057: 
jtulach@1057:     static void extractJSON(Object js, String[] props, Object[] values) {
jtulach@1057:         if (js instanceof JSObjToStr) {
jtulach@1057:             js = ((JSObjToStr)js).obj;
jtulach@1057:         }
jtulach@1057:         for (int i = 0; i < props.length; i++) {
jtulach@1057:             values[i] = getProperty(js, props[i]);
jaroslav@60:         }
jaroslav@60:     }
jtulach@1057: 
jaroslav@37: }