+++ /dev/null
-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
-package org.ibex.js;
-
-import java.io.*;
-import java.util.zip.*;
-import org.ibex.util.*;
-import org.ibex.plat.*;
-import org.ibex.net.*;
-
-/**
- * Essentiall an InputStream "factory". You can repeatedly ask a
- * Stream for an InputStream, and each InputStream you get back will
- * be totally independent of the others (ie separate stream position
- * and state) although they draw from the same data source.
- */
-// FEATURE: Should this be in org.ibex.js?
-public abstract class Stream extends JS implements JS.Cloneable {
-
- // Public Interface //////////////////////////////////////////////////////////////////////////////
-
- /*public static InputStream getInputStream(JS js) throws IOException { return ((Stream)js.unclone()).getInputStream();}*/
- public static class NotCacheableException extends Exception { }
-
- private Cache getCache = new Cache(100);
- public abstract JS _get(String key);
- public final JS get(JS key) throws JSExn {
- JS ret = (JS) getCache.get(key);
- if (ret == null) getCache.put(key, ret = _get(JS.toString(key)));
- return ret;
- }
-
- // Private Interface //////////////////////////////////////////////////////////////////////////////
-
- static String getCacheKey(JS s) throws NotCacheableException {
- if(s instanceof Stream) return ((Stream)s).getCacheKey();
- throw new NotCacheableException();
- }
-
- public abstract InputStream getInputStream() throws IOException;
- protected String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); }
-
- /** HTTP or HTTPS resource */
- // FEATURE: Only instansiate only ibex.net.HTTP, share with all substreams
- public static class HTTP extends Stream {
- private String url;
- public HTTP(String url) { while (url.endsWith("/")) url = url.substring(0, url.length() - 1); this.url = url; }
- public JS _get(String key) { return new HTTP(url + "/" + key); }
- public String getCacheKey(Vec path) throws NotCacheableException { return url; }
- public InputStream getInputStream() throws IOException { return new org.ibex.net.HTTP(url).GET(); }
- }
-
- /** byte arrays */
- public static class ByteArray extends Stream {
- private byte[] bytes;
- private String cacheKey;
- public ByteArray(byte[] bytes, String cacheKey) { this.bytes = bytes; this.cacheKey = cacheKey; }
- public String getCacheKey() throws NotCacheableException {
- if (cacheKey == null) throw new NotCacheableException(); return cacheKey; }
- public InputStream getInputStream() throws IOException { return new ByteArrayInputStream(bytes); }
- public JS _get(String key) { return null; }
- }
-
- /** a file */
- public static class File extends Stream {
- private String path;
- public File(String path) { this.path = path; }
- public String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); /* already on disk */ }
- public InputStream getInputStream() throws IOException { return new FileInputStream(path); }
- public JS _get(String key) { return new File(path + java.io.File.separatorChar + key); }
- }
-
- /** "unwrap" a Zip archive */
- public static class Zip extends Stream {
- private JS parent;
- private String path;
- public Zip(JS parent) { this(parent, null); }
- public Zip(JS parent, String path) {
- while(path != null && path.startsWith("/")) path = path.substring(1);
- this.parent = parent;
- this.path = path;
- }
- public String getCacheKey() throws NotCacheableException { return getCacheKey(parent) + "!zip:"; }
- public JS _get(String key) { return new Zip(parent, path==null?key:path+'/'+key); }
- public InputStream getInputStream() throws IOException {
- 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 IOException("requested file (" + path + ") not found in archive");
- return new KnownLength.KnownLengthInputStream(zis, (int)ze.getSize());
- }
- }
-
- /** "unwrap" a Cab archive */
- public static class Cab extends Stream {
- private JS parent;
- private String path;
- public Cab(JS parent) { this(parent, null); }
- public Cab(JS parent, String path) { this.parent = parent; this.path = path; }
- public String getCacheKey() throws NotCacheableException { return getCacheKey(parent) + "!cab:"; }
- public JS _get(String key) { return new Cab(parent, path==null?key:path+'/'+key); }
- public InputStream getInputStream() throws IOException { return new MSPack(parent.getInputStream()).getInputStream(path); }
- }
-
- /** the Builtin resource */
- public static class Builtin extends Stream {
- public String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); }
- public InputStream getInputStream() throws IOException { return Platform.getBuiltinInputStream(); }
- public JS _get(String key) { return null; }
- }
-
- /** shadow resource which replaces the graft */
- public static class ProgressWatcher extends Stream {
- final JS watchee;
- JS callback;
- public ProgressWatcher(JS watchee, JS callback) { this.watchee = watchee; this.callback = callback; }
- public String getCacheKey() throws NotCacheableException { return getCacheKey(watchee); }
- public InputStream getInputStream() throws IOException {
- final InputStream is = watchee.getInputStream();
- 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 Task() { public void perform() throws IOException, JSExn {
- callback.call(N(bytesDownloaded),
- N(is instanceof KnownLength ? ((KnownLength)is).getLength() : 0), null, null, 2);
- } });
- return ret;
- }
- };
- }
- public JS _get(String s) { return null; }
- }
-
- /** subclass from this if you want a CachedInputStream for each path */
- public static class CachedStream extends Stream {
- private JS parent;
- private boolean disk = false;
- private String key;
- private String s;
- public String getCacheKey() throws NotCacheableException { return key; }
- CachedInputStream cis = null;
- public CachedStream(JS p, String s, boolean d) throws NotCacheableException {
- this.parent = p; this.s = s; this.disk = d; this.key = getCacheKey(p);
- }
- public InputStream getInputStream() throws IOException {
- if (cis != null) return cis.getInputStream();
- if (!disk) {
- cis = new CachedInputStream(parent.getInputStream());
- } else {
- // FEATURE: Move LocalStorage into org.ibex.js or move this out
- java.io.File f = org.ibex.core.LocalStorage.Cache.getCacheFileForKey(key);
- if (f.exists()) return new FileInputStream(f);
- cis = new CachedInputStream(parent.getInputStream(), f);
- }
- return cis.getInputStream();
- }
- public JS _get(String s) { return null; }
- }
-}
projects / org.ibex.core.git / blobdiff