# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1414630221 -3600
# Node ID f5200d90b7304e3e76e23c4c0f587cd358c1d1d3
# Parent  20ea1a1b73aeb0b13f6e4d98cafac0cc4c1a1137
getClass().getResource(...).openConnection().getURL() returns a URL which is recognized by the browser and can be used to load resources with XHR or <img src='...'>. When no longer needed, convert connection to Closeable and use connection.close().

diff -r 20ea1a1b73ae -r f5200d90b730 rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java
--- a/rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java	Thu Oct 30 01:49:57 2014 +0100
+++ b/rt/emul/compact/src/test/java/org/apidesign/bck2brwsr/tck/ResourcesTest.java	Thu Oct 30 01:50:21 2014 +0100
@@ -17,10 +17,15 @@
  */
 package org.apidesign.bck2brwsr.tck;
 
+import java.io.ByteArrayInputStream;
+import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
+import java.net.URLConnection;
 import java.util.Enumeration;
+import net.java.html.js.JavaScriptBody;
+import org.apidesign.bck2brwsr.vmtest.BrwsrTest;
 import org.apidesign.bck2brwsr.vmtest.Compare;
 import org.apidesign.bck2brwsr.vmtest.VMTest;
 import org.testng.annotations.Factory;
@@ -63,8 +68,78 @@
         return readString(is);
     }
     
+    @Compare public String readResourceViaXMLHttpRequest() throws Exception {
+        return readResourceViaXHR("Resources.txt", null);
+    }
+    
+    @BrwsrTest public void xhrTestedInBrowser() throws Exception {
+        boolean[] run = { false };
+        readResourceViaXHR("Resources.txt", run);
+        assert run[0] : "XHR really used in browser";
+    }
+
+    @Compare public String readBinaryResourceViaXMLHttpRequest() throws Exception {
+        return readResourceViaXHR("0xfe", null);
+    }
+
+    private String readResourceViaXHR(final String res, boolean[] exec) throws IOException {
+        URL url = getClass().getResource(res);
+        URLConnection conn = url.openConnection();
+        String java = readBytes(url.openStream());
+        String java2 = readBytes(conn.getInputStream());
+        assert java.equals(java2) : "Java:\n" + java + "\nConn:\n" + java2;
+        
+        URL url2 = conn.getURL();
+        String java3 = readBytes(url.openStream());
+        assert java.equals(java3) : "Java:\n" + java + "\nConnURL:\n" + java3;
+        
+        
+        byte[] xhr = readXHR(url2.toExternalForm());
+        if (xhr != null) {
+            if (exec != null) {
+                exec[0] = true;
+            }
+            String s = readBytes(new ByteArrayInputStream(xhr));
+            assert java.equals(s) : "Java:\n" + java + "\nXHR:\n" + s;
+            
+            assert conn instanceof Closeable : "Can be closed";
+            
+            Closeable c = (Closeable) conn;
+            c.close();
+            
+            byte[] xhr2 = null;
+            try {
+                xhr2 = readXHR(url2.toExternalForm());
+            } catch (Throwable t) {
+                // OK, expecting error
+            }
+            assert xhr2 == null : "Cannot read the URL anymore";
+        }
+        return java;
+    }
+
+    @JavaScriptBody(args = { "url" }, body =
+        "if (typeof XMLHttpRequest === 'undefined') return null;\n" +
+        "var xhr = new XMLHttpRequest();\n" +
+        "xhr.overrideMimeType('text\\/plain; charset=x-user-defined');\n" +
+        "xhr.open('GET', url, false);\n" +
+        "xhr.send();\n" +
+        "var ret = []\n" +
+        "for (var i = 0; i < xhr.responseText.length; i++) {\n" +
+        "  ret.push(xhr.responseText.charCodeAt(i) & 0xff);\n" +
+        "}\n" +
+        "return ret;\n"
+    )
+    private static byte[] readXHR(String url) {
+        return null;
+    }
+    
     @Compare public String readResourceViaConnection() throws Exception {
-        InputStream is = getClass().getResource("Resources.txt").openConnection().getInputStream();
+        final URL url = getClass().getResource("Resources.txt");
+        String str = url.toExternalForm();
+        int idx = str.indexOf("org/apidesign/bck2brwsr/tck");
+        assert idx >= 0 : "Package name found in the URL name: " + str;
+        InputStream is = url.openConnection().getInputStream();
         return readString(is);
     }
 
@@ -82,6 +157,20 @@
         }
     }
 
+    private String readBytes(InputStream is) throws IOException {
+        StringBuilder sb = new StringBuilder();
+        byte[] b = new byte[512];
+        for (;;) { 
+            int len = is.read(b);
+            if (len == -1) {
+                return sb.toString();
+            }
+            for (int i = 0; i < len; i++) {
+                sb.append((int)b[i]).append(" ");
+            }
+        }
+    }
+
     @Compare public String readResourceAsStreamFromClassLoader() throws Exception {
         InputStream is = getClass().getClassLoader().getResourceAsStream("org/apidesign/bck2brwsr/tck/Resources.txt");
         return readString(is);
diff -r 20ea1a1b73ae -r f5200d90b730 rt/emul/mini/src/main/java/java/lang/Class.java
--- a/rt/emul/mini/src/main/java/java/lang/Class.java	Thu Oct 30 01:49:57 2014 +0100
+++ b/rt/emul/mini/src/main/java/java/lang/Class.java	Thu Oct 30 01:50:21 2014 +0100
@@ -1436,19 +1436,21 @@
      * @since  JDK1.1
      */
     public java.net.URL getResource(String name) {
-        return newResourceURL(name, getResourceAsStream(name));
+        name = resolveName(name);
+        byte[] arr = ClassLoader.getResourceAsStream0(name, 0);
+        return arr == null ? null : newResourceURL(name, arr);
     }
 
-    static URL newResourceURL(String name, InputStream is) {
-        return is == null ? null : newResourceURL0(URL.class, "res:/" + name, is);
+    static URL newResourceURL(String name, byte[] arr) {
+        return newResourceURL0(URL.class, "res:/" + name, arr);
     }
     
-    @JavaScriptBody(args = { "url", "spec", "is" }, body = 
+    @JavaScriptBody(args = { "url", "spec", "arr" }, body = 
         "var u = url.cnstr(true);\n"
-      + "u.constructor.cons__VLjava_lang_String_2Ljava_io_InputStream_2.call(u, spec, is);\n"
+      + "u.constructor.cons__VLjava_lang_String_2_3B.call(u, spec, arr);\n"
       + "return u;"
     )
-    private static native URL newResourceURL0(Class<URL> url, String spec, InputStream is);
+    private static native URL newResourceURL0(Class<URL> url, String spec, byte[] arr);
 
    /**
      * Add a package name prefix if the name is not absolute Remove leading "/"
diff -r 20ea1a1b73ae -r f5200d90b730 rt/emul/mini/src/main/java/java/lang/ClassLoader.java
--- a/rt/emul/mini/src/main/java/java/lang/ClassLoader.java	Thu Oct 30 01:49:57 2014 +0100
+++ b/rt/emul/mini/src/main/java/java/lang/ClassLoader.java	Thu Oct 30 01:50:21 2014 +0100
@@ -916,7 +916,7 @@
             if (next == null && skip >= 0) {
                 byte[] arr = getResourceAsStream0(name, skip++);
                 if (arr != null) {
-                    next = Class.newResourceURL(name, new ByteArrayInputStream(arr));
+                    next = Class.newResourceURL(name, arr);
                 } else {
                     skip = -1;
                 }
diff -r 20ea1a1b73ae -r f5200d90b730 rt/emul/mini/src/main/java/java/net/URL.java
--- a/rt/emul/mini/src/main/java/java/net/URL.java	Thu Oct 30 01:49:57 2014 +0100
+++ b/rt/emul/mini/src/main/java/java/net/URL.java	Thu Oct 30 01:50:21 2014 +0100
@@ -26,6 +26,7 @@
 package java.net;
 
 import java.io.ByteArrayInputStream;
+import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
 import org.apidesign.bck2brwsr.core.JavaScriptBody;
@@ -216,7 +217,9 @@
     private int hashCode = -1;
     
     /** input stream associated with the URL */
-    private InputStream is;
+    private byte[] arr;
+    /** blob URL, if any */
+    private URL blob;
 
     /**
      * Creates a <code>URL</code> object from the specified
@@ -427,9 +430,9 @@
         this(null, spec);
     }
     
-    private URL(String spec, InputStream is) throws MalformedURLException {
+    private URL(String spec, byte[] arr) throws MalformedURLException {
         this(null, spec);
-        this.is = is;
+        this.arr = arr;
     }
 
     /**
@@ -984,8 +987,8 @@
      * @see        java.net.URLConnection#getInputStream()
      */
     public final InputStream openStream() throws java.io.IOException {
-        if (is != null) {
-            return is;
+        if (arr != null) {
+            return new ByteArrayInputStream(arr);
         }
         byte[] arr = (byte[]) getContent(new Class[] { byte[].class });
         if (arr == null) {
@@ -1057,13 +1060,49 @@
         }
         return null;
     }
+    
+    @JavaScriptBody(args = "data", body = 
+        "if (typeof Blob !== 'undefined' && typeof Uint8Array !== 'undefined' && typeof URL !== 'undefined' && typeof URL.createObjectURL != 'undefined') {\n" +
+        "  var s = new Uint8Array(data);\n" +
+        "  var b = new Blob([ s ]);\n" +
+        "  return URL.createObjectURL(b);\n" +
+        "} else {\n" +
+        "  return null;\n" +
+        "}"
+    )
+    static native String toBlobURL(byte[] data);
+    
+    @JavaScriptBody(args = "url", body = "URL.revokeObjectURL(url);")
+    static native void closeBlob(String url);
 
     static URLStreamHandler getURLStreamHandler(final String protocol) {
         URLStreamHandler universal = new URLStreamHandler() {
             @Override
             protected URLConnection openConnection(URL u) throws IOException {
-                return new URLConnection(u) {
-                    Object stream = url.is;
+                final ByteArrayInputStream is;
+                if (u.arr != null) {
+                    is = new ByteArrayInputStream(u.arr);
+                    if (u.blob != null) {
+                        u = u.blob;
+                    } else {
+                        String blob = toBlobURL(u.arr);
+                        if (blob != null) {
+                            URL blobURL = new URL(null, blob, false);
+                            blobURL.blob = blobURL;
+                            blobURL.arr = u.arr;
+                            u = blobURL;
+                        }
+                    }
+                } else {
+                    is = null;
+                }
+                
+                class ResourceConnection extends URLConnection implements Closeable {
+                    public ResourceConnection(URL url) {
+                        super(url);
+                    }
+                    
+                    Object stream = is;
                     
                     @Override
                     public void connect() throws IOException {
@@ -1086,9 +1125,15 @@
                         }
                         return (InputStream)stream;
                     }
-                    
-                    
-                };
+
+                    @Override
+                    public void close() throws IOException {
+                        if (url.blob != null) {
+                            closeBlob(url.blob.toExternalForm());
+                        }
+                    }
+                }
+                return new ResourceConnection(u);
             }
         };
         return universal;