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
|
---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_CONV_FROM_NETWORK_FUNCTION
Section: 3
Source: libcurl
See-also:
- CURLOPT_CONV_FROM_UTF8_FUNCTION (3)
- CURLOPT_CONV_TO_NETWORK_FUNCTION (3)
Protocol:
- All
Added-in: 7.15.4
---
# NAME
CURLOPT_CONV_FROM_NETWORK_FUNCTION - convert data from network to host encoding
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode conv_callback(char *ptr, size_t length);
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
conv_callback);
~~~
# DESCRIPTION
Pass a pointer to your callback function, which should match the prototype
shown above.
Applies to non-ASCII platforms. curl_version_info(3) returns the
**CURL_VERSION_CONV** feature bit set if this option is provided.
The data to be converted is in a buffer pointed to by the *ptr* parameter.
The amount of data to convert is indicated by the *length* parameter. The
converted data overlays the input data in the buffer pointed to by the ptr
parameter. *CURLE_OK* must be returned upon successful conversion. A
CURLcode return value defined by curl.h, such as *CURLE_CONV_FAILED*,
should be returned if an error was encountered.
CURLOPT_CONV_FROM_NETWORK_FUNCTION(3) converts to host encoding from the
network encoding. It is used when commands or ASCII data are received over the
network.
If you set a callback pointer to NULL, or do not set it at all, the built-in
libcurl iconv functions are used. If HAVE_ICONV was not defined when libcurl
was built, and no callback has been established, the conversion returns the
**CURLE_CONV_REQD** error code.
If **HAVE_ICONV** is defined, **CURL_ICONV_CODESET_OF_HOST** must also be
defined. For example:
~~~c
#define CURL_ICONV_CODESET_OF_HOST "IBM-1047"
~~~
The iconv code in libcurl defaults the network and UTF8 codeset names as
follows:
~~~
#define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
#define CURL_ICONV_CODESET_FOR_UTF8 "UTF-8"
~~~
You need to override these definitions if they are different on your system.
# DEFAULT
NULL
# %PROTOCOLS%
# EXAMPLE
~~~c
static CURLcode my_conv_from_ascii_to_ebcdic(char *buffer, size_t length)
{
int rc = 0;
/* in-place convert 'buffer' from ASCII to EBCDIC */
if(rc == 0) {
/* success */
return CURLE_OK;
}
else {
return CURLE_CONV_FAILED;
}
}
int main(void)
{
CURL *curl = curl_easy_init();
/* use platform-specific functions for codeset conversions */
curl_easy_setopt(curl, CURLOPT_CONV_FROM_NETWORK_FUNCTION,
my_conv_from_ascii_to_ebcdic);
}
~~~
# DEPRECATED
Not available and deprecated since 7.82.0.
Available only if **CURL_DOES_CONVERSIONS** was defined when libcurl was
built.
# %AVAILABILITY%
# RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
libcurl-errors(3).
|
