summaryrefslogtreecommitdiffstats
path: root/akregator/src/librss/loader.cpp
blob: ea0134e62a7e300f6f06d846424a7381d653eb63 (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
/*
 * loader.cpp
 *
 * Copyright (c) 2001, 2002, 2003 Frerich Raabe <raabe@kde.org>
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. For licensing and distribution details, check the
 * accompanying file 'COPYING'.
 */
#include "loader.h"
#include "document.h"
#include "feeddetector.h"

#include <tdeio/job.h>
#include <kprocess.h>
#include <kstaticdeleter.h>
#include <kurl.h>
#include <kdebug.h>

#include <tqdom.h>
#include <tqbuffer.h>
#include <tqregexp.h>
#include <tqstring.h>
#include <tqstringlist.h>
#include <tqtimer.h>

using namespace RSS;

DataRetriever::DataRetriever()
{
}

DataRetriever::~DataRetriever()
{
}

class FileRetriever::Private
{
    public:
        
   Private()
      : buffer(NULL),
        lastError(0), job(NULL)
   {
   }

   ~Private()
   {
      delete buffer;
   }

   TQBuffer *buffer;
   int lastError;
   TDEIO::Job *job;
   static KStaticDeleter<TQString> userAgentsd;
   static TQString* userAgent;
};

KStaticDeleter<TQString> FileRetriever::Private::userAgentsd;
TQString* FileRetriever::Private::userAgent = 0L;
FileRetriever::FileRetriever()
   : d(new Private)
{
}

FileRetriever::~FileRetriever()
{
   delete d;
}

bool FileRetriever::m_useCache = true;

TQString FileRetriever::userAgent()
{
    if (Private::userAgent == 0L)
        FileRetriever::Private::userAgentsd.setObject(Private::userAgent, new TQString);
    return *Private::userAgent;
}

void FileRetriever::setUserAgent(const TQString &ua)
{
    if (Private::userAgent == 0L)
        FileRetriever::Private::userAgentsd.setObject(Private::userAgent, new TQString);
    (*Private::userAgent) = ua;
}

void FileRetriever::setUseCache(bool enabled)
{
    m_useCache = enabled;
}

void FileRetriever::retrieveData(const KURL &url)
{
   if (d->buffer)
      return;

   d->buffer = new TQBuffer;
   d->buffer->open(IO_WriteOnly);

   KURL u=url;

   if (u.protocol()=="feed")
       u.setProtocol("http");

   d->job = TDEIO::get(u, false, false);
   d->job->addMetaData("cache", m_useCache ? "refresh" : "reload");

   TQString ua = userAgent();
   if (!ua.isEmpty())
      d->job->addMetaData("UserAgent", ua);


   TQTimer::singleShot(1000*90, this, TQT_SLOT(slotTimeout()));

   connect(d->job, TQT_SIGNAL(data(TDEIO::Job *, const TQByteArray &)),
                TQT_SLOT(slotData(TDEIO::Job *, const TQByteArray &)));
   connect(d->job, TQT_SIGNAL(result(TDEIO::Job *)), TQT_SLOT(slotResult(TDEIO::Job *)));
   connect(d->job, TQT_SIGNAL(permanentRedirection(TDEIO::Job *, const KURL &, const KURL &)),
                TQT_SLOT(slotPermanentRedirection(TDEIO::Job *, const KURL &, const KURL &)));
}

void FileRetriever::slotTimeout()
{
    abort();

    delete d->buffer;
    d->buffer = NULL;

    d->lastError = TDEIO::ERR_SERVER_TIMEOUT;

    emit dataRetrieved(TQByteArray(), false);
}

int FileRetriever::errorCode() const
{
   return d->lastError;
}

void FileRetriever::slotData(TDEIO::Job *, const TQByteArray &data)
{
   d->buffer->writeBlock(data.data(), data.size());
}

void FileRetriever::slotResult(TDEIO::Job *job)
{
   TQByteArray data = d->buffer->buffer();
   data.detach();

   delete d->buffer;
   d->buffer = NULL;

   d->lastError = job->error();
   emit dataRetrieved(data, d->lastError == 0);
}

void FileRetriever::slotPermanentRedirection(TDEIO::Job *, const KURL &, const KURL &newUrl)
{
   emit permanentRedirection(newUrl);
}

void FileRetriever::abort()
{
	if (d->job)
	{
		d->job->kill(true);
		d->job = NULL;
	}
}

struct OutputRetriever::Private
{
   Private() : process(NULL),
      buffer(NULL),
      lastError(0)
   {
   }

   ~Private()
   {
      delete process;
      delete buffer;
   }

   KShellProcess *process;
   TQBuffer *buffer;
   int lastError;
};

OutputRetriever::OutputRetriever() :
   d(new Private)
{
}

OutputRetriever::~OutputRetriever()
{
   delete d;
}

void OutputRetriever::retrieveData(const KURL &url)
{
   // Ignore subsequent calls if we didn't finish the previous job yet.
   if (d->buffer || d->process)
      return;

   d->buffer = new TQBuffer;
   d->buffer->open(IO_WriteOnly);

   d->process = new KShellProcess();
   connect(d->process, TQT_SIGNAL(processExited(TDEProcess *)),
                       TQT_SLOT(slotExited(TDEProcess *)));
   connect(d->process, TQT_SIGNAL(receivedStdout(TDEProcess *, char *, int)),
                       TQT_SLOT(slotOutput(TDEProcess *, char *, int)));
   *d->process << url.path();
   d->process->start(TDEProcess::NotifyOnExit, TDEProcess::Stdout);
}

int OutputRetriever::errorCode() const
{
   return d->lastError;
}

void OutputRetriever::slotOutput(TDEProcess *, char *data, int length)
{
   d->buffer->writeBlock(data, length);
}

void OutputRetriever::slotExited(TDEProcess *p)
{
   if (!p->normalExit())
      d->lastError = p->exitStatus();

   TQByteArray data = d->buffer->buffer();
   data.detach();

   delete d->buffer;
   d->buffer = NULL;

   delete d->process;
   d->process = NULL;

   emit dataRetrieved(data, p->normalExit() && p->exitStatus() == 0);
}

struct Loader::Private
{
   Private() : retriever(NULL),
      lastError(0)
   {
   }

   ~Private()
   {
      delete retriever;
   }

   DataRetriever *retriever;
   int lastError;
   KURL discoveredFeedURL;
   KURL url;
};

Loader *Loader::create()
{
   return new Loader;
}

Loader *Loader::create(TQObject *object, const char *slot)
{
   Loader *loader = create();
   connect(loader, TQT_SIGNAL(loadingComplete(Loader *, Document, Status)),
           object, slot);
   return loader;
}

Loader::Loader() : d(new Private)
{
}

Loader::~Loader()
{
    delete d;
}

void Loader::loadFrom(const KURL &url, DataRetriever *retriever)
{
   if (d->retriever != NULL)
      return;

   d->url=url;
   d->retriever = retriever;

   connect(d->retriever, TQT_SIGNAL(dataRetrieved(const TQByteArray &, bool)),
           this, TQT_SLOT(slotRetrieverDone(const TQByteArray &, bool)));

   d->retriever->retrieveData(url);
}

int Loader::errorCode() const
{
   return d->lastError;
}

void Loader::abort()
{
	if (d && d->retriever)
	{
		d->retriever->abort();
        delete d->retriever;
		d->retriever=NULL;
	}
    emit loadingComplete(this, TQDomDocument(), Aborted);
    delete this;
}

const KURL &Loader::discoveredFeedURL() const
{
   return d->discoveredFeedURL;
}

void Loader::slotRetrieverDone(const TQByteArray &data, bool success)
{
   d->lastError = d->retriever->errorCode();

   delete d->retriever;
   d->retriever = NULL;

   Document rssDoc;
   Status status = Success;

   if (success) {
      TQDomDocument doc;

      /* Some servers insert whitespace before the <?xml...?> declaration.
       * TQDom doesn't tolerate that (and it's right, that's invalid XML),
       * so we strip that.
       */

      const char *charData = data.data();
      int len = data.count();

      while (len && TQChar(*charData).isSpace()) {
         --len;
         ++charData;
      }

      if ( len > 3 && TQChar(*charData) == TQChar(0357) ) { // 0357 0273 0277
			  len -= 3;
			  charData += 3;
	  }
      TQByteArray tmpData;
      tmpData.setRawData(charData, len);

      if (doc.setContent(tmpData))
      {
         rssDoc = Document(doc);
         if (!rssDoc.isValid())
         {
            discoverFeeds(tmpData);
            status = ParseError;
         }
      }
      else
      {
         discoverFeeds(tmpData);
         status = ParseError;
      }

      tmpData.resetRawData(charData, len);
   } else
      status = RetrieveError;

   emit loadingComplete(this, rssDoc, status);

   delete this;
}

void Loader::discoverFeeds(const TQByteArray &data)
{
    TQString str = TQString(data).simplifyWhiteSpace();
    
    TQStringList feeds; 
    
    FeedDetectorEntryList list = FeedDetector::extractFromLinkTags(str); 
    
    for (FeedDetectorEntryList::ConstIterator it = list.begin(); it != list.end(); ++it)
    {
        feeds += (*it).url();
    }  
    
    if (list.isEmpty())
        feeds = FeedDetector::extractBruteForce(str);
        
    TQString feed = feeds.first();
    TQString host = d->url.host();
    KURL testURL;
    // loop through, prefer feeds on same host
    TQStringList::Iterator end( feeds.end() );
    for ( TQStringList::Iterator it = feeds.begin(); it != end; ++it) 
    {
        testURL=*it;
        if (testURL.host() == host)
        {
            feed = *it;
            break;
        }
    }

    d->discoveredFeedURL = feed.isNull() ? TQString() : FeedDetector::fixRelativeURL(feed, d->url); 
}

#include "loader.moc"
// vim:noet:ts=4