summaryrefslogtreecommitdiff
path: root/src/net/download.h
blob: 9e52b190fd224ad7f7aa515ffe908cecc5dd84bb (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
/*
 *  The ManaPlus Client
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2013  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/>.
 */


#ifndef NET_DOWNLOAD_H
#define NET_DOWNLOAD_H

#include <SDL/SDL_types.h>

#include <stdio.h>
#include <string>

#include "localconsts.h"

enum DownloadStatus
{
    DOWNLOAD_STATUS_CANCELLED = -3,
    DOWNLOAD_STATUS_THREAD_ERROR = -2,
    DOWNLOAD_STATUS_ERROR = -1,
    DOWNLOAD_STATUS_STARTING = 0,
    DOWNLOAD_STATUS_IDLE,
    DOWNLOAD_STATUS_COMPLETE
};

typedef int (*DownloadUpdate)(void *ptr, DownloadStatus status,
                              size_t total, size_t remaining);

// Matches what CURL expects
typedef size_t (*WriteFunction)( void *ptr, size_t size, size_t nmemb,
                                 void *stream);

struct SDL_Thread;
typedef void CURL;
struct curl_slist;

namespace Net
{
class Download final
{
    public:
        Download(void *const ptr, const std::string &url,
                 const DownloadUpdate updateFunction,
                 const bool ignoreError = false);

        A_DELETE_COPY(Download)

        ~Download();

        void addHeader(const std::string &header);

        /**
         * Convience method for adding no-cache headers.
         */
        void noCache();

        void setFile(const std::string &filename, const int64_t adler32 = -1);

        void setWriteFunction(WriteFunction write);

        /**
         * Starts the download thread.
         * @returns true  if thread was created
         *          false if the thread could not be made or download wasn't
         *                properly setup
         */
        bool start();

        /**
         * Cancels the download. Returns immediately, the cancelled status will
         * be noted in the next avialable update call.
         */
        void cancel();

        char *getError() const A_WARN_UNUSED;

        void setIgnoreError(const bool n)
        { mIgnoreError = n; }

        static unsigned long fadler32(FILE *const file) A_WARN_UNUSED;

        static void addProxy(CURL *const curl);

        static void secureCurl(CURL *const curl);

        static unsigned long adlerBuffer(char *buffer, int size);

    private:
        static int downloadThread(void *ptr);
        static int downloadProgress(void *clientp, double dltotal,
                                    double dlnow, double ultotal,
                                    double ulnow);
        void *mPtr;
        std::string mUrl;
        struct
        {
            unsigned cancel : 1;
            unsigned memoryWrite: 1;
            unsigned checkAdler: 1;
        } mOptions;
        std::string mFileName;
        WriteFunction mWriteFunction;
        unsigned long mAdler;
        DownloadUpdate mUpdateFunction;
        SDL_Thread *mThread;
        CURL *mCurl;
        curl_slist *mHeaders;
        char *mError;
        bool mIgnoreError;
};

}  // namespace Net

#endif  // NET_DOWNLOAD_H