aboutsummaryrefslogtreecommitdiff
path: root/lib/mime.h
blob: 4d52b72fb3484514609b6cb1aa13c3a8fe1e12fb (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
#ifndef HEADER_CURL_MIME_H
#define HEADER_CURL_MIME_H
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/

#define MIME_RAND_BOUNDARY_CHARS        16  /* Nb. of random boundary chars. */

/* Part flags. */
#define MIME_USERHEADERS_OWNER  (1 << 0)
#define MIME_BODY_ONLY          (1 << 1)

/* Part source kinds. */
enum mimekind {
  MIMEKIND_NONE = 0,            /* Part not set. */
  MIMEKIND_DATA,                /* Allocated mime data. */
  MIMEKIND_NAMEDFILE,           /* Data from named file. */
  MIMEKIND_FILE,                /* Data from file pointer. */
  MIMEKIND_CALLBACK,            /* Data from `read' callback. */
  MIMEKIND_MULTIPART,           /* Data is a mime subpart. */
  MIMEKIND_LAST
};

/* Readback state tokens. */
enum mimestate {
  MIMESTATE_BEGIN,              /* Readback has not yet started. */
  MIMESTATE_CURLHEADERS,        /* In curl-generated headers. */
  MIMESTATE_USERHEADERS,        /* In caller's supplied headers. */
  MIMESTATE_EOH,                /* End of headers. */
  MIMESTATE_BODY,               /* Placeholder. */
  MIMESTATE_BOUNDARY1,          /* In boundary prefix. */
  MIMESTATE_BOUNDARY2,          /* In boundary. */
  MIMESTATE_CONTENT,            /* In content. */
  MIMESTATE_END,                /* End of part reached. */
  MIMESTATE_LAST
};

/* Mime headers strategies. */
enum mimestrategy {
  MIMESTRATEGY_MAIL,            /* Mime mail. */
  MIMESTRATEGY_FORM,            /* HTTP post form. */
  MIMESTRATEGY_LAST
};

/* Mime readback state. */
struct mime_state {
  enum mimestate state;       /* Current state token. */
  void *         ptr;         /* State-dependent pointer. */
  size_t         offset;      /* State-dependent offset. */
};

/* A mime context. */
struct Curl_mime {
  struct Curl_easy *     easy;         /* The associated easy handle. */
  struct Curl_mimepart * parent;       /* Parent part. */
  struct Curl_mimepart * firstpart;    /* First part. */
  struct Curl_mimepart * lastpart;     /* Last part. */
  char *                 boundary;     /* The part boundary. */
  struct mime_state      state;        /* Current readback state. */
};

/* A mime part. */
struct Curl_mimepart {
  struct Curl_easy *     easy;         /* The associated easy handle. */
  struct Curl_mime *     parent;       /* Parent mime structure. */
  struct Curl_mimepart * nextpart;     /* Forward linked list. */
  enum mimekind          kind;         /* The part kind. */
  char *                 data;         /* Memory data or file name. */
  curl_read_callback     readfunc;     /* Read function. */
  curl_seek_callback     seekfunc;     /* Seek function. */
  curl_free_callback     freefunc;     /* Argument free function. */
  void *                 arg;          /* Argument to callback functions. */
  FILE *                 namedfp;      /* Named file pointer. */
  struct curl_slist *    curlheaders;  /* Part headers. */
  struct curl_slist *    userheaders;  /* Part headers. */
  char *                 mimetype;     /* Part mime type. */
  char *                 filename;     /* Remote file name. */
  char *                 name;         /* Data name. */
  size_t                 namesize;     /* Data name size. */
  curl_off_t             origin;       /* Origin file offset. */
  curl_off_t             datasize;     /* Expected data size. */
  unsigned int           flags;        /* Flags. */
  struct mime_state      state;        /* Current readback state. */
};


/* Prototypes. */
void Curl_mime_initpart(struct Curl_mimepart *part, struct Curl_easy *easy);
void Curl_mime_cleanpart(struct Curl_mimepart *part);
CURLcode Curl_mime_prepare_headers(struct Curl_mimepart *part,
                                   const char *contenttype,
                                   const char *disposition,
                                   enum mimestrategy strategy);
curl_off_t Curl_mime_size(struct Curl_mimepart *part);
size_t Curl_mime_read(char *buffer, size_t size, size_t nitems,
                      void *instream);
CURLcode Curl_mime_rewind(struct Curl_mimepart *part);
CURLcode Curl_mime_add_header(struct curl_slist **slp, const char *fmt, ...);
CURLcode Curl_mime_file(curl_mimepart *part, FILE *fp, int closewhendone);

#endif /* HEADER_CURL_MIME_H */