import java.util.zip.*;
import org.xwt.js.*;
import org.xwt.util.*;
+import org.bouncycastle.util.encoders.Base64;
/** base class for XWT resources */
public abstract class Res extends JS {
public String getDescriptiveName() { return ""; }
+ public String typeName() { return "resource"; }
/** cache of subresources so that the equality operator works on them */
private Hash refCache = null;
+ public Template t = null;
+
public Res getParent() { return null; }
+ /** an InputStream that makes sure it is not in the MessageQueue when blocked on a read */
+ // FIXME
+ private static class BackgroundInputStream extends FilterInputStream {
+ BackgroundInputStream(InputStream i) { super(i); }
+ /*
+ private void suspend() throws IOException {
+ if (!ThreadMessage.suspendThread())
+ throw new IOException("attempt to perform background-only operation in a foreground thread");
+ }
+ private void resume() {
+ ThreadMessage.resumeThread();
+ }
+ public int read() throws IOException {
+ suspend();
+ try { return super.read(); }
+ finally { resume(); }
+ }
+ public int read(byte[] b, int off, int len) throws IOException {
+ suspend();
+ try { return super.read(b, off, len); }
+ finally { resume(); }
+ }
+ */
+ }
+
/** returns an InputStream containing the Resource's contents */
- public InputStream getInputStream() throws IOException { return getInputStream(""); }
+ public final InputStream getInputStream() throws IOException { return new BackgroundInputStream(getInputStream("")); }
public abstract InputStream getInputStream(String path) throws IOException;
/** graft newResource in place of this resource on its parent */
public Res addExtension(String extension) { return new Ref(this, extension); }
public Object[] keys() { throw new JS.Exn("cannot enumerate a resource"); }
- public void put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); }
+ public Object put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); }
public Object get(Object key) {
if ("".equals(key)) {
Template t = Template.getTemplate(addExtension(".xwt"));
return ret;
}
- public static Res stringToRes(String url) { return stringToRes(url, false); }
- public static Res stringToRes(String url, boolean permitLocalFilesystem) {
- if (url.indexOf('!') != -1)
- return (Res)(new Zip(stringToRes(url.substring(0, url.lastIndexOf('!')))).get(url.substring(url.lastIndexOf('!') + 1)));
+ public static Res stringToRes(String url) {
+ if (url.indexOf('!') != -1) {
+ Res ret = new Zip(stringToRes(url.substring(0, url.lastIndexOf('!'))));
+ String subpath = url.substring(url.lastIndexOf('!') + 1);
+ if (subpath.length() > 0) ret = (Res)ret.get(subpath);
+ return ret;
+ }
if (url.startsWith("http://")) return new HTTP(url);
if (url.startsWith("https://")) return new HTTP(url);
- if (url.startsWith("file:") && permitLocalFilesystem) return new File(url.substring(5));
- if (url.startsWith("cab:")) return new CAB(stringToRes(url.substring(4)));
- throw new JS.Exn("invalid resource specifier");
+ if (url.startsWith("cab:")) return new Cab(stringToRes(url.substring(4)));
+ if (url.startsWith("data:")) return new ByteArray(Base64.decode(url.substring(5)));
+ if (url.startsWith("utf8:")) return new ByteArray(url.substring(5).getBytes());
+ throw new JS.Exn("invalid resource specifier " + url);
+ }
+
+ /** subclass from this if you want a CachedInputStream for each path */
+ public static abstract class CachedRes extends Res {
+ private Hash cachedInputStreams = new Hash();
+ abstract InputStream _getInputStream(String path) throws IOException;
+ public final InputStream getInputStream(String path) throws IOException {
+ CachedInputStream cis = (CachedInputStream)cachedInputStreams.get(path);
+ if (cis == null) {
+ cis = new CachedInputStream(_getInputStream(path));
+ cachedInputStreams.put(path, cis);
+ }
+ return cis.getInputStream();
+ }
}
/** HTTP or HTTPS resource */
- public static class HTTP extends Res {
+ public static class HTTP extends CachedRes {
private String url;
HTTP(String url) { this.url = url; }
- public InputStream getInputStream(String path) throws IOException { return new org.xwt.HTTP(url + path).GET(); }
+ public String getDescriptiveName() { return url; }
+ public InputStream _getInputStream(String path) throws IOException {
+ return new org.xwt.HTTP(url + path).GET(); }
}
/** byte arrays */
public static class ByteArray extends Res {
private byte[] bytes;
ByteArray(byte[] bytes) { this.bytes = bytes; }
+ public String getDescriptiveName() { return "byte[]"; }
public InputStream getInputStream(String path) throws IOException {
if (!"".equals(path)) throw new JS.Exn("can't get subresources of a byte[] resource");
return new ByteArrayInputStream(bytes);
public static class File extends Res {
private String path;
File(String path) { this.path = path; }
+ public String getDescriptiveName() { return "file://" + path; }
public InputStream getInputStream(String rest) throws IOException {
return new FileInputStream((path + rest).replace('/', java.io.File.separatorChar)); }
}
- /** wrap a Res around a preexisting InputStream */
- public static class IS extends Res {
- InputStream parent;
- IS(InputStream parent) { this.parent = parent; }
- public InputStream getInputStream(String path) {
- if (!"".equals(path)) throw new JS.Exn("can't access subresources of IS");
- return parent;
- }
- }
-
/** "unwrap" a Zip archive */
public static class Zip extends Res {
private Res parent;
Zip(Res parent) { this.parent = parent; }
+ public String getDescriptiveName() { return parent.getDescriptiveName() + "!"; }
public InputStream getInputStream(String path) throws IOException {
if (path.startsWith("/")) path = path.substring(1);
- ZipInputStream zis = new ZipInputStream(parent.getInputStream());
+ InputStream pis = parent.getInputStream();
+ ZipInputStream zis = new ZipInputStream(pis);
ZipEntry ze = zis.getNextEntry();
while(ze != null && !ze.getName().equals(path)) ze = zis.getNextEntry();
- if (ze == null) throw new JS.Exn("requested file not found in archive");
- return zis;
+ if (ze == null) throw new JS.Exn("requested file (" + path + ") not found in archive");
+ return new KnownLength.KnownLengthInputStream(zis, (int)ze.getSize());
}
}
+ /** "unwrap" a Cab archive */
+ public static class Cab extends Res {
+ private Res parent;
+ Cab(Res parent) { this.parent = parent; }
+ public String getDescriptiveName() { return "cab[" + parent.getDescriptiveName() + "]"; }
+ public InputStream getInputStream(String path) throws IOException {
+ // FIXME: knownlength
+ if (path.startsWith("/")) path = path.substring(1);
+ return new org.xwt.translators.MSPack(parent.getInputStream()).getInputStream(path);
+ }
+ }
+
+ /** the Builtin resource */
+ public static class Builtin extends Res {
+ public Builtin() { };
+ public String getDescriptiveName() { return "[builtin]"; }
+ public InputStream getInputStream(String path) throws IOException {
+ if (!path.equals("")) throw new IOException("the builtin resource has no subresources");
+ return Platform.getBuiltinInputStream();
+ }
+ }
+
/** what you get when you reference a subresource */
public static class Ref extends Res {
Res parent;
Ref(Res parent, Object key) { this.parent = parent; this.key = key; }
public String getDescriptiveName() {
String pdn = parent.getDescriptiveName();
- return pdn.equals("") ? key.toString() : (pdn + "." + key.toString());
+ if (pdn.equals("")) return key.toString();
+ if (!pdn.endsWith("!")) pdn += ".";
+ return pdn + key.toString();
}
public Res addExtension(String extension) {
return (key instanceof String && ((String)key).endsWith(extension)) ? this : new Ref(parent, key + extension);
public Res graft(Object newResource) { return new Graft(parent, key, newResource); }
}
+ // FEATURE: eliminate code duplication with JS.Graft
/** shadow resource which replaces the graft */
public static class Graft extends Res {
Res graftee;
public Object get(Object key) { return replaced_key.equals(key) ? replaced_val : graftee.get(key); }
public String getDescriptiveName() { return graftee.getDescriptiveName(); }
public Res getParent() { return graftee.getParent(); }
+ public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn {
+ if (!replaced_key.equals(method)) return graftee.callMethod(method, args, checkOnly);
+ if (replaced_val instanceof Callable) return checkOnly ? Boolean.TRUE : ((Callable)replaced_val).call(args);
+ if (checkOnly) return Boolean.FALSE;
+ throw new JS.Exn("attempt to call non-function");
+ }
+ public Number coerceToNumber() { return graftee.coerceToNumber(); }
+ public String coerceToString() { return graftee.coerceToString(); }
+ public boolean coerceToBoolean() { return graftee.coerceToBoolean(); }
+ public String typeName() { return graftee.typeName(); }
}
- /** unpacks a Microsoft CAB file (possibly embedded in another file; we scan for 'MSCF' */
- public static class CAB extends Res {
- private Res parent;
- CAB(Res parent) { this.parent = parent; }
- private int swap_endian(int i) {
- return ((i & 0xff) << 24) | ((i & 0xff00) << 8) | ((i & 0xff0000) >>> 8) | (i >>> 24);
- }
- public InputStream getInputStream(String path) throws IOException {
- InputStream is = parent.getInputStream();
- byte[] scan = new byte[4];
- int ofs = 0;
- for(int i=0; i<2; i++) {
- // wierdly, .exe files have three MSCF's
- while(scan[0] != 'M' || scan[1] != 'S' || scan[2] != 'C' || scan[3] != 'F') {
- System.arraycopy(scan, 1, scan, 0, 3);
- int read = is.read();
- if (read == -1) throw new JS.Exn("MSCF header tag not found in file");
- scan[3] = (byte)read;
- ofs++;
- }
- scan[0] = 0;
- }
- Log.log(this, "found MSCF header at offset " + ofs);
- return org.xwt.util.CAB.getFileInputStream(is, path, true);
+ /** shadow resource which replaces the graft */
+ public static class ProgressWatcher extends Res {
+ final Res watchee;
+ Function callback;
+ ProgressWatcher(Res watchee, Function callback) { this.watchee = watchee; this.callback = callback; }
+ public String getDescriptiveName() { return watchee.getDescriptiveName(); }
+ public InputStream getInputStream(String s) throws IOException {
+ final InputStream is = watchee.getInputStream(s);
+ return new FilterInputStream(is) {
+ int bytesDownloaded = 0;
+ public int read() throws IOException {
+ int ret = super.read();
+ if (ret != -1) bytesDownloaded++;
+ return ret;
+ }
+ public int read(byte[] b, int off, int len) throws IOException {
+ int ret = super.read(b, off, len);
+ if (ret != 1) bytesDownloaded += ret;
+ Scheduler.add(new Scheduler.Task() { public void perform() {
+ JS.Array args = new JS.Array();
+ args.addElement(new Integer(bytesDownloaded));
+ args.addElement(new Integer(is instanceof KnownLength ? ((KnownLength)is).getLength() : 0));
+ // FIXME
+ //new JS.Context(callback, null, args).resume();
+ } });
+ return ret;
+ }
+ };
}
}
projects / org.ibex.core.git / blobdiff