summaryrefslogtreecommitdiff
path: root/src/net/download.cpp
blob: 5e3ffebf66caa38b28162fd8cdfafb6849d291a7 (plain) (blame)
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
622
623
624
625
626
627
628
629
630
/*
 *  The ManaPlus Client
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2017  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  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.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "net/download.h"

#include "configuration.h"
#include "logger.h"
#include "settings.h"

#include "fs/files.h"
#include "utils/sdlhelper.h"

#include <zlib.h>

#include <sstream>

#include "debug.h"

const char *DOWNLOAD_ERROR_MESSAGE_THREAD
    = "Could not create download thread!";

extern volatile bool isTerminate;

enum
{
    OPTIONS_NONE = 0,
    OPTIONS_MEMORY = 1
};

namespace Net
{

std::string Download::mUploadResponse = "";

Download::Download(void *const ptr,
                   const std::string &url,
                   const DownloadUpdate updateFunction,
                   const bool ignoreError,
                   const bool isUpload,
                   const bool isXml) :
    mPtr(ptr),
    mUrl(url),
    mOptions(),
    mFileName(),
    mUrlQueue(),
    mWriteFunction(nullptr),
    mAdler(0),
    mUpdateFunction(updateFunction),
    mThread(nullptr),
    mCurl(nullptr),
    mHeaders(nullptr),
    mFormPost(nullptr),
    mError(static_cast<char*>(calloc(CURL_ERROR_SIZE + 1, 1))),
    mIgnoreError(ignoreError),
    mUpload(isUpload),
    mIsXml(isXml)
{
    if (mError)
        mError[0] = 0;

    mOptions.cancel = 0;
    mOptions.memoryWrite = 0;
    mOptions.checkAdler = true;
    if (!mUpload)
    {
        const std::string serverName = settings.serverName;
        if (!serverName.empty())
        {
            if (mUrl.find('?') == std::string::npos)
                mUrl.append("?host=");
            else
                mUrl.append("&host=");
            mUrl.append(serverName);
        }
    }
    mUrlQueue.push(url);
}

Download::~Download()
{
    if (mFormPost)
    {
        curl_formfree(mFormPost);
        mFormPost = nullptr;
    }

    if (mHeaders)
    {
        curl_slist_free_all(mHeaders);
        mHeaders = nullptr;
    }

    int status;
    if (mThread && SDL_GetThreadID(mThread))
        SDL_WaitThread(mThread, &status);
    mThread = nullptr;
    free(mError);
}

/**
 * Calculates the Alder-32 checksum for the given file.
 */
unsigned long Download::fadler32(FILE *const file)
{
    if (!file)
        return 0;

    // Obtain file size
    fseek(file, 0, SEEK_END);
    const long fileSize = ftell(file);
    if (fileSize < 0)
    {   // file size error
        return 0;
    }
    rewind(file);

    // Calculate Adler-32 checksum
    char *const buffer = new char[CAST_SIZE(fileSize)];
    const uInt read = static_cast<uInt>(fread(buffer, 1, fileSize, file));
    unsigned long adler = adler32(0L, nullptr, 0);
    adler = adler32(static_cast<uInt>(adler),
        reinterpret_cast<Bytef*>(buffer), read);
    delete [] buffer;
    return adler;
}

unsigned long Download::adlerBuffer(const char *const buffer, int size)
{
    FUNC_BLOCK("Download::adlerBuffer", 1)
    unsigned long adler = adler32(0L, nullptr, 0);
    return adler32(static_cast<uInt>(adler),
        reinterpret_cast<const Bytef*>(buffer), size);
}

void Download::addHeader(const std::string &header)
{
    mHeaders = curl_slist_append(mHeaders, header.c_str());
}

void Download::noCache()
{
    addHeader("pragma: no-cache");
    addHeader("Cache-Control: no-cache");
}

void Download::setFile(const std::string &filename, const int64_t adler32)
{
    mOptions.memoryWrite = 0;
    mFileName = filename;

    if (adler32 > -1)
    {
        mAdler = static_cast<unsigned long>(adler32);
        mOptions.checkAdler = true;
    }
    else
    {
        mOptions.checkAdler = 0;
    }
}

void Download::setWriteFunction(WriteFunction write)
{
    mOptions.memoryWrite = true;
    mWriteFunction = write;
}

bool Download::start()
{
    logger->log("Starting download: %s", mUrl.c_str());

    mThread = SDL::createThread(&downloadThread, "download", this);
    if (!mThread)
    {
        logger->log1(DOWNLOAD_ERROR_MESSAGE_THREAD);
        if (mError)
            strcpy(mError, DOWNLOAD_ERROR_MESSAGE_THREAD);
        mUpdateFunction(mPtr, DownloadStatus::ThreadError, 0, 0);
        if (!mIgnoreError)
            return false;
    }

    return true;
}

void Download::cancel()
{
    logger->log("Canceling download: %s", mUrl.c_str());

    mOptions.cancel = true;
    if (mThread && SDL_GetThreadID(mThread))
        SDL_WaitThread(mThread, nullptr);

    mThread = nullptr;
}

const char *Download::getError() const
{
    return mError;
}

int Download::downloadProgress(void *clientp, double dltotal, double dlnow,
                               double ultotal A_UNUSED, double ulnow A_UNUSED)
{
    Download *const d = reinterpret_cast<Download *>(clientp);

    if (!d)
        return -5;

    if (d->mUpload)
        return 0;

    if (d->mOptions.cancel)
    {
        return d->mUpdateFunction(d->mPtr, DownloadStatus::Cancelled,
                                  CAST_SIZE(dltotal),
                                  CAST_SIZE(dlnow));
    }

    return d->mUpdateFunction(d->mPtr, DownloadStatus::Idle,
                              CAST_SIZE(dltotal),
                              CAST_SIZE(dlnow));
}

int Download::downloadThread(void *ptr)
{
    int attempts = 0;
    bool complete = false;
    Download *const d = reinterpret_cast<Download*>(ptr);
    CURLcode res;

    if (!d)
        return 0;

    std::string outFilename;
    if (d->mUpload)
    {
        outFilename = d->mFileName;
        prepareForm(&d->mFormPost, outFilename);
    }
    else
    {
        if (!d->mOptions.memoryWrite)
            outFilename = d->mFileName + ".part";
        else
            outFilename.clear();
    }

    while (!d->mUrlQueue.empty())
    {
        attempts = 0;
        complete = false;
        d->mUrl = d->mUrlQueue.front();
        d->mUrlQueue.pop();

        logger->log_r("selected url: %s", d->mUrl.c_str());
        while (attempts < 3 &&
               !complete &&
               !d->mOptions.cancel &&
               isTerminate == false)
        {
            d->mUpdateFunction(d->mPtr, DownloadStatus::Starting, 0, 0);

            if (d->mOptions.cancel || isTerminate == true)
            {
                // need terminate thread?
                d->mThread = nullptr;
                return 0;
            }
            d->mCurl = curl_easy_init();

            if (d->mCurl && !d->mOptions.cancel && isTerminate == false)
            {
                FILE *file = nullptr;

                if (d->mUpload)
                {
                    logger->log_r("Uploading: %s", d->mUrl.c_str());
                    curl_easy_setopt(d->mCurl, CURLOPT_URL, d->mUrl.c_str());
                    curl_easy_setopt(d->mCurl, CURLOPT_HTTPPOST, d->mFormPost);
                    curl_easy_setopt(d->mCurl, CURLOPT_WRITEFUNCTION,
                        &Download::writeFunction);
                    mUploadResponse.clear();
                }
                else
                {
                    logger->log_r("Downloading: %s", d->mUrl.c_str());
                    curl_easy_setopt(d->mCurl, CURLOPT_FOLLOWLOCATION, 1);
                    curl_easy_setopt(d->mCurl, CURLOPT_HTTPHEADER,
                        d->mHeaders);
                    if (d->mOptions.memoryWrite)
                    {
                        curl_easy_setopt(d->mCurl, CURLOPT_FAILONERROR, 1);
                        curl_easy_setopt(d->mCurl, CURLOPT_WRITEFUNCTION,
                                         d->mWriteFunction);
                        curl_easy_setopt(d->mCurl, CURLOPT_WRITEDATA, d->mPtr);
                    }
                    else
                    {
                        file = fopen(outFilename.c_str(), "w+b");
                        if (file)
                        {
                            curl_easy_setopt(d->mCurl, CURLOPT_WRITEDATA,
                                file);
                        }
                    }
                    curl_easy_setopt(d->mCurl,
                        CURLOPT_USERAGENT,
                        settings.userAgent.c_str());

                    curl_easy_setopt(d->mCurl, CURLOPT_ERRORBUFFER, d->mError);
                    curl_easy_setopt(d->mCurl, CURLOPT_URL, d->mUrl.c_str());
                    curl_easy_setopt(d->mCurl, CURLOPT_NOPROGRESS, 0);
                    curl_easy_setopt(d->mCurl, CURLOPT_PROGRESSFUNCTION,
                        &downloadProgress);
                    curl_easy_setopt(d->mCurl, CURLOPT_PROGRESSDATA, ptr);
#if LIBCURL_VERSION_NUM >= 0x070a00
                    curl_easy_setopt(d->mCurl, CURLOPT_NOSIGNAL, 1);
#endif  // LIBCURL_VERSION_NUM >= 0x070a00
                    curl_easy_setopt(d->mCurl, CURLOPT_CONNECTTIMEOUT, 30);
                    curl_easy_setopt(d->mCurl, CURLOPT_TIMEOUT, 1800);
                    addHeaders(d->mCurl);
                    addProxy(d->mCurl);
                    secureCurl(d->mCurl);
                }

                if ((res = curl_easy_perform(d->mCurl)) != 0 &&
                    !d->mOptions.cancel &&
                    isTerminate == false)
                {
                    PRAGMA45(GCC diagnostic push)
                    PRAGMA45(GCC diagnostic ignored "-Wswitch-enum")
                    switch (res)
                    {
                        case CURLE_ABORTED_BY_CALLBACK:
                            d->mOptions.cancel = true;
                            break;
                        case CURLE_COULDNT_CONNECT:
                        default:
                            break;
                    }
                    PRAGMA45(GCC diagnostic pop)

                    if (res)
                    {
                        if (d->mError)
                        {
                            logger->log_r("curl error %d: %s host: %s",
                                res, d->mError, d->mUrl.c_str());
                        }
                        attempts++;
                        continue;
                    }

                    if (d->mOptions.cancel || isTerminate == true)
                        break;

//                    d->mUpdateFunction(d->mPtr, DownloadStatus::Error, 0, 0);

                    if (file)
                    {
                        fclose(file);
                        file = nullptr;
                    }
                    if (!d->mUpload && !d->mOptions.memoryWrite)
                        ::remove(outFilename.c_str());
                    attempts++;
                    continue;
                }

                curl_easy_cleanup(d->mCurl);
                d->mCurl = nullptr;

                if (d->mUpload)
                {
                    if (file)
                    {
                        fclose(file);
                        file = nullptr;
                    }
                    // need check first if we read data from server
                    complete = true;
                }
                else
                {
                    if (!d->mOptions.memoryWrite)
                    {
                        // Don't check resources.xml checksum
                        if (d->mOptions.checkAdler)
                        {
                            const unsigned long adler = fadler32(file);

                            if (d->mAdler != adler)
                            {
                                if (file)
                                {
                                    fclose(file);
                                    file = nullptr;
                                }

                                // Remove the corrupted file
                                ::remove(d->mFileName.c_str());
                                logger->log_r("Checksum for file %s failed:"
                                    " (%lx/%lx)",
                                    d->mFileName.c_str(),
                                    adler, d->mAdler);
                                attempts++;
                                continue;
                            }
                        }

                        if (file)
                        {
                            fclose(file);
                            file = nullptr;
                        }

                        // Any existing file with this name is deleted first,
                        // otherwise the rename will fail on Windows.
                        if (!d->mOptions.cancel && isTerminate == false)
                        {
                            if (d->mIsXml)
                            {
                                if (!XML::Document::validateXml(outFilename))
                                {
                                    logger->log_r("Xml file validation error");
                                    attempts++;
                                    continue;
                                }
                            }

                            ::remove(d->mFileName.c_str());
                            Files::renameFile(outFilename, d->mFileName);

                            // Check if we can open it and no errors were
                            // encountered during renaming
                            file = fopen(d->mFileName.c_str(), "rb");
                            if (file)
                            {
                                fclose(file);
                                file = nullptr;
                                complete = true;
                            }
                        }
                    }
                    else
                    {
                        // It's stored in memory, we're done
                        complete = true;
                    }
                }
            }

            if (d->mCurl)
            {
                curl_easy_cleanup(d->mCurl);
                d->mCurl = nullptr;
            }

            if (d->mOptions.cancel || isTerminate == true)
            {
                // need ternibate thread?
                d->mThread = nullptr;
                return 0;
            }
            attempts++;
        }

        if ((complete && attempts < 3) || d->mOptions.cancel)
            break;
    }

    d->mThread = nullptr;

    if (d->mOptions.cancel || isTerminate == true)
    {
        // Nothing to do...
    }
    else if (!complete || attempts >= 3)
    {
        d->mUpdateFunction(d->mPtr, DownloadStatus::Error, 0, 0);
    }
    else
    {
        d->mUpdateFunction(d->mPtr, DownloadStatus::Complete, 0, 0);
    }

    return 0;
}

void Download::addProxy(CURL *const curl)
{
    const int mode = config.getIntValue("downloadProxyType");
    if (!mode)
        return;

    if (mode > 1)
    {
        curl_easy_setopt(curl, CURLOPT_PROXY,
            config.getStringValue("downloadProxy").c_str());
    }
    switch (mode)
    {
        case 1:  // direct connection
        default:
            curl_easy_setopt(curl, CURLOPT_PROXY, "");
            break;
        case 2:  // HTTP
            break;
        case 3:  // HTTP 1.0
#if LIBCURL_VERSION_NUM >= 0x071304
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTP_1_0);
#endif  // LIBCURL_VERSION_NUM >= 0x071304
            break;
        case 4:  // SOCKS4
#if LIBCURL_VERSION_NUM >= 0x070a00
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
#endif  // LIBCURL_VERSION_NUM >= 0x070a00
            break;
        case 5:  // SOCKS4A
#if LIBCURL_VERSION_NUM >= 0x071200
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
#elif LIBCURL_VERSION_NUM >= 0x071000
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
#endif  // LIBCURL_VERSION_NUM >= 0x071200

            break;
        case 6:  // SOCKS5
#if LIBCURL_VERSION_NUM >= 0x071200
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
#endif  // LIBCURL_VERSION_NUM >= 0x071200

            break;
        case 7:  // SOCKS5 hostname
#if LIBCURL_VERSION_NUM >= 0x071200
            curl_easy_setopt(curl, CURLOPT_PROXYTYPE,
                CURLPROXY_SOCKS5_HOSTNAME);
#endif  // LIBCURL_VERSION_NUM >= 0x071200

            break;
    }
}

#if LIBCURL_VERSION_NUM >= 0x070f01
void Download::secureCurl(CURL *const curl)
#else  // LIBCURL_VERSION_NUM >= 0x070f01
void Download::secureCurl(CURL *const curl A_UNUSED)
#endif  // LIBCURL_VERSION_NUM >= 0x070f01
{
#if LIBCURL_VERSION_NUM >= 0x071304
    curl_easy_setopt(curl, CURLOPT_PROTOCOLS,
        CURLPROTO_HTTP | CURLPROTO_HTTPS);
    curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS,
        CURLPROTO_HTTP | CURLPROTO_HTTPS);
#endif  // LIBCURL_VERSION_NUM >= 0x071304
#if LIBCURL_VERSION_NUM >= 0x071500
    curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 0);
#endif  // LIBCURL_VERSION_NUM >= 0x071500
#if LIBCURL_VERSION_NUM >= 0x070f01
    curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 3);
#endif  // LIBCURL_VERSION_NUM >= 0x070f01
}

#if LIBCURL_VERSION_NUM >= 0x071507
void Download::addHeaders(CURL *const curl)
{
    curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
}
#else  // LIBCURL_VERSION_NUM >= 0x071507

void Download::addHeaders(CURL *const curl A_UNUSED)
{
}
#endif  // LIBCURL_VERSION_NUM >= 0x071507

void Download::prepareForm(curl_httppost **form, const std::string &fileName)
{
    curl_httppost *lastPtr = nullptr;

    std::ifstream file;
    file.open(fileName.c_str(), std::ios::in);
    if (!file.is_open())
        return;

    char *line = new char[10001];
    std::ostringstream str;
    while (file.getline(line, 10000))
        str << line << "\n";

    delete [] line;

    curl_formadd(form, &lastPtr,
        CURLFORM_COPYNAME, "sprunge",
        CURLFORM_COPYCONTENTS, str.str().c_str(),
        CURLFORM_END);
}

size_t Download::writeFunction(void *ptr,
                               size_t size,
                               size_t nmemb,
                               void *stream A_UNUSED)
{
    const size_t totalMem = size * nmemb;
    char *buf = new char[totalMem + 1];
    memcpy(buf, ptr, totalMem);
    buf[totalMem] = 0;
    mUploadResponse.append(buf);
    delete [] buf;
    return totalMem;
}

}  // namespace Net