aboutsummaryrefslogtreecommitdiffstats
blob: d1e13ce35b5a91e34b3aa36e1ca9ba45f12360ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
//
//  ========================================================================
//  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.server.handler;

import java.io.IOException;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;

import javax.servlet.AsyncContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.http.HttpMethod;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.io.WriterOutputStream;
import org.eclipse.jetty.server.HttpOutput;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Response;
import org.eclipse.jetty.server.handler.ContextHandler.Context;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.util.resource.FileResource;
import org.eclipse.jetty.util.resource.Resource;


/* ------------------------------------------------------------ */
/** Resource Handler.
 *
 * This handle will serve static content and handle If-Modified-Since headers.
 * No caching is done.
 * Requests for resources that do not exist are let pass (Eg no 404's).
 *
 *
 * @org.apache.xbean.XBean
 */
public class ResourceHandler extends HandlerWrapper
{
    private static final Logger LOG = Log.getLogger(ResourceHandler.class);

    ContextHandler _context;
    Resource _baseResource;
    Resource _defaultStylesheet;
    Resource _stylesheet;
    String[] _welcomeFiles={"index.html"};
    MimeTypes _mimeTypes = new MimeTypes();
    String _cacheControl;
    boolean _directory;
    boolean _etags;
    int _minMemoryMappedContentLength=-1;
    int _minAsyncContentLength=0;

    /* ------------------------------------------------------------ */
    public ResourceHandler()
    {

    }

    /* ------------------------------------------------------------ */
    public MimeTypes getMimeTypes()
    {
        return _mimeTypes;
    }

    /* ------------------------------------------------------------ */
    public void setMimeTypes(MimeTypes mimeTypes)
    {
        _mimeTypes = mimeTypes;
    }

    /* ------------------------------------------------------------ */
    /** Get the directory option.
     * @return true if directories are listed.
     */
    public boolean isDirectoriesListed()
    {
        return _directory;
    }

    /* ------------------------------------------------------------ */
    /** Set the directory.
     * @param directory true if directories are listed.
     */
    public void setDirectoriesListed(boolean directory)
    {
        _directory = directory;
    }

    /* ------------------------------------------------------------ */
    /** Get minimum memory mapped file content length.
     * @return the minimum size in bytes of a file resource that will
     * be served using a memory mapped buffer, or -1 (default) for no memory mapped
     * buffers.
     */
    public int getMinMemoryMappedContentLength()
    {
        return _minMemoryMappedContentLength;
    }

    /* ------------------------------------------------------------ */
    /** Set minimum memory mapped file content length.
     * @param minMemoryMappedFileSize the minimum size in bytes of a file resource that will
     * be served using a memory mapped buffer, or -1 for no memory mapped
     * buffers.
     */
    public void setMinMemoryMappedContentLength(int minMemoryMappedFileSize)
    {
        _minMemoryMappedContentLength = minMemoryMappedFileSize;
    }

    /* ------------------------------------------------------------ */
    /** Get the minimum content length for async handling.
     * @return The minimum size in bytes of the content before asynchronous 
     * handling is used, or -1 for no async handling or 0 (default) for using
     * {@link HttpServletResponse#getBufferSize()} as the minimum length.
     */
    public int getMinAsyncContentLength()
    {
        return _minAsyncContentLength;
    }

    /* ------------------------------------------------------------ */
    /** Set the minimum content length for async handling.
     * @param minAsyncContentLength The minimum size in bytes of the content before asynchronous 
     * handling is used, or -1 for no async handling or 0 for using
     * {@link HttpServletResponse#getBufferSize()} as the minimum length.
     */
    public void setMinAsyncContentLength(int minAsyncContentLength)
    {
        _minAsyncContentLength = minAsyncContentLength;
    }

    /* ------------------------------------------------------------ */
    /**
     * @return True if ETag processing is done
     */
    public boolean isEtags()
    {
        return _etags;
    }

    /* ------------------------------------------------------------ */
    /**
     * @param etags True if ETag processing is done
     */
    public void setEtags(boolean etags)
    {
        _etags = etags;
    }

    /* ------------------------------------------------------------ */
    @Override
    public void doStart()
    throws Exception
    {
        Context scontext = ContextHandler.getCurrentContext();
        _context = (scontext==null?null:scontext.getContextHandler());

        super.doStart();
    }

    /* ------------------------------------------------------------ */
    /**
     * @return Returns the resourceBase.
     */
    public Resource getBaseResource()
    {
        if (_baseResource==null)
            return null;
        return _baseResource;
    }

    /* ------------------------------------------------------------ */
    /**
     * @return Returns the base resource as a string.
     */
    public String getResourceBase()
    {
        if (_baseResource==null)
            return null;
        return _baseResource.toString();
    }


    /* ------------------------------------------------------------ */
    /**
     * @param base The resourceBase to set.
     */
    public void setBaseResource(Resource base)
    {
        _baseResource=base;
    }

    /* ------------------------------------------------------------ */
    /**
     * @param resourceBase The base resource as a string.
     */
    public void setResourceBase(String resourceBase)
    {
        try
        {
            setBaseResource(Resource.newResource(resourceBase));
        }
        catch (Exception e)
        {
            LOG.warn(e.toString());
            LOG.debug(e);
            throw new IllegalArgumentException(resourceBase);
        }
    }

    /* ------------------------------------------------------------ */
    /**
     * @return Returns the stylesheet as a Resource.
     */
    public Resource getStylesheet()
    {
    	if(_stylesheet != null)
    	{
    	    return _stylesheet;
    	}
    	else
    	{
    	    if(_defaultStylesheet == null)
    	    {
    	        try
    	        {
    	            _defaultStylesheet =  Resource.newResource(this.getClass().getResource("/jetty-dir.css"));
    	        }
    	        catch(IOException e)
    	        {
    	            LOG.warn(e.toString());
    	            LOG.debug(e);
    	        }
    	    }
    	    return _defaultStylesheet;
    	}
    }

    /* ------------------------------------------------------------ */
    /**
     * @param stylesheet The location of the stylesheet to be used as a String.
     */
    public void setStylesheet(String stylesheet)
    {
        try
        {
            _stylesheet = Resource.newResource(stylesheet);
            if(!_stylesheet.exists())
            {
                LOG.warn("unable to find custom stylesheet: " + stylesheet);
                _stylesheet = null;
            }
        }
    	catch(Exception e)
    	{
    		LOG.warn(e.toString());
            LOG.debug(e);
            throw new IllegalArgumentException(stylesheet.toString());
    	}
    }

    /* ------------------------------------------------------------ */
    /**
     * @return the cacheControl header to set on all static content.
     */
    public String getCacheControl()
    {
        return _cacheControl.toString();
    }

    /* ------------------------------------------------------------ */
    /**
     * @param cacheControl the cacheControl header to set on all static content.
     */
    public void setCacheControl(String cacheControl)
    {
        _cacheControl=cacheControl;
    }

    /* ------------------------------------------------------------ */
    /*
     */
    public Resource getResource(String path) throws MalformedURLException
    {
        if (path==null || !path.startsWith("/"))
            throw new MalformedURLException(path);

        Resource base = _baseResource;
        if (base==null)
        {
            if (_context==null)
                return null;
            base=_context.getBaseResource();
            if (base==null)
                return null;
        }

        try
        {
            path=URIUtil.canonicalPath(path);
            return base.addPath(path);
        }
        catch(Exception e)
        {
            LOG.ignore(e);
        }

        return null;
    }

    /* ------------------------------------------------------------ */
    protected Resource getResource(HttpServletRequest request) throws MalformedURLException
    {
        String servletPath;
        String pathInfo;
        Boolean included = request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) != null;
        if (included != null && included.booleanValue())
        {
            servletPath = (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH);
            pathInfo = (String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO);

            if (servletPath == null && pathInfo == null)
            {
                servletPath = request.getServletPath();
                pathInfo = request.getPathInfo();
            }
        }
        else
        {
            servletPath = request.getServletPath();
            pathInfo = request.getPathInfo();
        }

        String pathInContext=URIUtil.addPaths(servletPath,pathInfo);
        return getResource(pathInContext);
    }


    /* ------------------------------------------------------------ */
    public String[] getWelcomeFiles()
    {
        return _welcomeFiles;
    }

    /* ------------------------------------------------------------ */
    public void setWelcomeFiles(String[] welcomeFiles)
    {
        _welcomeFiles=welcomeFiles;
    }

    /* ------------------------------------------------------------ */
    protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException
    {
        for (int i=0;i<_welcomeFiles.length;i++)
        {
            Resource welcome=directory.addPath(_welcomeFiles[i]);
            if (welcome.exists() && !welcome.isDirectory())
                return welcome;
        }

        return null;
    }

    /* ------------------------------------------------------------ */
    /*
     * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int)
     */
    @Override
    public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
    {
        if (baseRequest.isHandled())
            return;

        boolean skipContentBody = false;

        if(!HttpMethod.GET.is(request.getMethod()))
        {
            if(!HttpMethod.HEAD.is(request.getMethod()))
            {
                //try another handler
                super.handle(target, baseRequest, request, response);
                return;
            }
            skipContentBody = true;
        }

        Resource resource = getResource(request);
        // If resource is not found
        if (resource==null || !resource.exists())
        {
            // inject the jetty-dir.css file if it matches
            if (target.endsWith("/jetty-dir.css"))
            {
                resource = getStylesheet();
                if (resource==null)
                    return;
                response.setContentType("text/css");
            }
            else
            {
                //no resource - try other handlers
                super.handle(target, baseRequest, request, response);
                return;
            }
        }

        // We are going to serve something
        baseRequest.setHandled(true);

        // handle directories
        if (resource.isDirectory())
        {
            if (!request.getPathInfo().endsWith(URIUtil.SLASH))
            {
                response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH)));
                return;
            }

            Resource welcome=getWelcome(resource);
            if (welcome!=null && welcome.exists())
                resource=welcome;
            else
            {
                doDirectory(request,response,resource);
                baseRequest.setHandled(true);
                return;
            }
        }

        // Handle ETAGS
        long last_modified=resource.lastModified();
        String etag=null;
        if (_etags)
        {
            // simple handling of only a single etag
            String ifnm = request.getHeader(HttpHeader.IF_NONE_MATCH.asString());
            etag=resource.getWeakETag();
            if (ifnm!=null && resource!=null && ifnm.equals(etag))
            {
                response.setStatus(HttpStatus.NOT_MODIFIED_304);
                baseRequest.getResponse().getHttpFields().put(HttpHeader.ETAG,etag);
                return;
            }
        }
        
        // Handle if modified since 
        if (last_modified>0)
        {
            long if_modified=request.getDateHeader(HttpHeader.IF_MODIFIED_SINCE.asString());
            if (if_modified>0 && last_modified/1000<=if_modified/1000)
            {
                response.setStatus(HttpStatus.NOT_MODIFIED_304);
                return;
            }
        }

        // set the headers
        String mime=_mimeTypes.getMimeByExtension(resource.toString());
        if (mime==null)
            mime=_mimeTypes.getMimeByExtension(request.getPathInfo());
        doResponseHeaders(response,resource,mime!=null?mime.toString():null);
        if (_etags)
            baseRequest.getResponse().getHttpFields().put(HttpHeader.ETAG,etag);
        
        if(skipContentBody)
            return;
        
        
        // Send the content
        OutputStream out =null;
        try {out = response.getOutputStream();}
        catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());}

        // Has the output been wrapped
        if (!(out instanceof HttpOutput))
            // Write content via wrapped output
            resource.writeTo(out,0,resource.length());
        else
        {
            // select async by size
            int min_async_size=_minAsyncContentLength==0?response.getBufferSize():_minAsyncContentLength;
            
            if (request.isAsyncSupported() && 
                min_async_size>0 &&
                resource.length()>=min_async_size)
            {
                final AsyncContext async = request.startAsync();
                Callback callback = new Callback()
                {
                    @Override
                    public void succeeded()
                    {
                        async.complete();
                    }

                    @Override
                    public void failed(Throwable x)
                    {
                        LOG.warn(x.toString());
                        LOG.debug(x);
                        async.complete();
                    }   
                };

                // Can we use a memory mapped file?
                if (_minMemoryMappedContentLength>0 && 
                    resource.length()>_minMemoryMappedContentLength &&
                    resource instanceof FileResource)
                {
                    ByteBuffer buffer = BufferUtil.toBuffer(resource.getFile());
                    ((HttpOutput)out).sendContent(buffer,callback);
                }
                else  // Do a blocking write of a channel (if available) or input stream
                {
                    // Close of the channel/inputstream is done by the async sendContent
                    ReadableByteChannel channel= resource.getReadableByteChannel();
                    if (channel!=null)
                        ((HttpOutput)out).sendContent(channel,callback);
                    else
                        ((HttpOutput)out).sendContent(resource.getInputStream(),callback);
                }
            }
            else
            {
                // Can we use a memory mapped file?
                if (_minMemoryMappedContentLength>0 && 
                    resource.length()>_minMemoryMappedContentLength &&
                    resource instanceof FileResource)
                {
                    ByteBuffer buffer = BufferUtil.toBuffer(resource.getFile());
                    ((HttpOutput)out).sendContent(buffer);
                }
                else  // Do a blocking write of a channel (if available) or input stream
                {
                    ReadableByteChannel channel= resource.getReadableByteChannel();
                    if (channel!=null)
                        ((HttpOutput)out).sendContent(channel);
                    else
                        ((HttpOutput)out).sendContent(resource.getInputStream());
                }
            }
        }
    }

    /* ------------------------------------------------------------ */
    protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource)
        throws IOException
    {
        if (_directory)
        {
            String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0);
            response.setContentType("text/html; charset=UTF-8");
            response.getWriter().println(listing);
        }
        else
            response.sendError(HttpStatus.FORBIDDEN_403);
    }

    /* ------------------------------------------------------------ */
    /** Set the response headers.
     * This method is called to set the response headers such as content type and content length.
     * May be extended to add additional headers.
     * @param response
     * @param resource
     * @param mimeType
     */
    protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType)
    {
        if (mimeType!=null)
            response.setContentType(mimeType);

        long length=resource.length();

        if (response instanceof Response)
        {
            HttpFields fields = ((Response)response).getHttpFields();

            if (length>0)
                ((Response)response).setLongContentLength(length);

            if (_cacheControl!=null)
                fields.put(HttpHeader.CACHE_CONTROL,_cacheControl);
        }
        else
        {
            if (length>Integer.MAX_VALUE)
                response.setHeader(HttpHeader.CONTENT_LENGTH.asString(),Long.toString(length));
            else if (length>0)
                response.setContentLength((int)length);

            if (_cacheControl!=null)
                response.setHeader(HttpHeader.CACHE_CONTROL.asString(),_cacheControl.toString());
        }
    }
}