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
|
#ifndef HEADER_CURL_MIME_H
#define HEADER_CURL_MIME_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, 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.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.
*
***************************************************************************/
#include "curl_setup.h"
#define MIME_BOUNDARY_DASHES 24 /* leading boundary dashes */
#define MIME_RAND_BOUNDARY_CHARS 16 /* Nb. of random boundary chars. */
#define MAX_ENCODED_LINE_LENGTH 76 /* Maximum encoded line length. */
#define ENCODING_BUFFER_SIZE 256 /* Encoding temp buffers size. */
/* Part flags. */
#define MIME_USERHEADERS_OWNER (1 << 0)
#define MIME_BODY_ONLY (1 << 1)
#define MIME_FAST_READ (1 << 2)
#define FILE_CONTENTTYPE_DEFAULT "application/octet-stream"
#define MULTIPART_CONTENTTYPE_DEFAULT "multipart/mixed"
#define DISPOSITION_DEFAULT "attachment"
/* Part source kinds. */
enum mimekind {
MIMEKIND_NONE = 0, /* Part not set. */
MIMEKIND_DATA, /* Allocated mime data. */
MIMEKIND_FILE, /* Data from file. */
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
};
/* Content transfer encoder. */
struct mime_encoder {
const char * name; /* Encoding name. */
size_t (*encodefunc)(char *buffer, size_t size, bool ateof,
curl_mimepart *part); /* Encoded read. */
curl_off_t (*sizefunc)(curl_mimepart *part); /* Encoded size. */
};
/* Content transfer encoder state. */
struct mime_encoder_state {
size_t pos; /* Position on output line. */
size_t bufbeg; /* Next data index in input buffer. */
size_t bufend; /* First unused byte index in input buffer. */
char buf[ENCODING_BUFFER_SIZE]; /* Input buffer. */
};
/* Mime readback state. */
struct mime_state {
enum mimestate state; /* Current state token. */
void *ptr; /* State-dependent pointer. */
curl_off_t offset; /* State-dependent offset. */
};
/* Boundary string length. */
#define MIME_BOUNDARY_LEN (MIME_BOUNDARY_DASHES + MIME_RAND_BOUNDARY_CHARS)
/* A mime multipart. */
struct curl_mime {
struct Curl_easy *easy; /* The associated easy handle. */
curl_mimepart *parent; /* Parent part. */
curl_mimepart *firstpart; /* First part. */
curl_mimepart *lastpart; /* Last part. */
char boundary[MIME_BOUNDARY_LEN + 1]; /* The part boundary. */
struct mime_state state; /* Current readback state. */
};
/* A mime part. */
struct curl_mimepart {
struct Curl_easy *easy; /* The associated easy handle. */
curl_mime *parent; /* Parent mime structure. */
curl_mimepart *nextpart; /* Forward linked list. */
enum mimekind kind; /* The part kind. */
unsigned int flags; /* Flags. */
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 *fp; /* 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. */
curl_off_t datasize; /* Expected data size. */
struct mime_state state; /* Current readback state. */
const struct mime_encoder *encoder; /* Content data encoder. */
struct mime_encoder_state encstate; /* Data encoder state. */
size_t lastreadstatus; /* Last read callback returned status. */
};
CURLcode Curl_mime_add_header(struct curl_slist **slp, const char *fmt, ...);
#if (!defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_MIME)) || \
!defined(CURL_DISABLE_SMTP) || !defined(CURL_DISABLE_IMAP)
/* Prototypes. */
void Curl_mime_initpart(struct curl_mimepart *part, struct Curl_easy *easy);
void Curl_mime_cleanpart(struct curl_mimepart *part);
CURLcode Curl_mime_duppart(struct curl_mimepart *dst,
const curl_mimepart *src);
CURLcode Curl_mime_set_subparts(struct curl_mimepart *part,
struct curl_mime *subparts,
int take_ownership);
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);
const char *Curl_mime_contenttype(const char *filename);
void Curl_mime_unpause(struct curl_mimepart *part);
#else
/* if disabled */
#define Curl_mime_initpart(x,y)
#define Curl_mime_cleanpart(x)
#define Curl_mime_duppart(x,y) CURLE_OK /* Nothing to duplicate. Succeed */
#define Curl_mime_set_subparts(a,b,c) CURLE_NOT_BUILT_IN
#define Curl_mime_prepare_headers(a,b,c,d) CURLE_NOT_BUILT_IN
#define Curl_mime_size(x) (curl_off_t) -1
#define Curl_mime_read NULL
#define Curl_mime_rewind(x) ((void)x, CURLE_NOT_BUILT_IN)
#define Curl_mime_unpause(x)
#endif
#endif /* HEADER_CURL_MIME_H */
|
