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comparison mupdf-source/thirdparty/curl/docs/libcurl/opts/CURLOPT_POSTFIELDS.3 @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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23 .TH CURLOPT_POSTFIELDS 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
24 .SH NAME
25 CURLOPT_POSTFIELDS \- specify data to POST to server
26 .SH SYNOPSIS
27 #include <curl/curl.h>
28
29 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDS, char *postdata);
30 .SH DESCRIPTION
31 Pass a char * as parameter, pointing to the full data to send in an HTTP POST
32 operation. You must make sure that the data is formatted the way you want the
33 server to receive it. libcurl will not convert or encode it for you in any
34 way. For example, the web server may assume that this data is url-encoded.
35
36 The data pointed to is NOT copied by the library: as a consequence, it must be
37 preserved by the calling application until the associated transfer finishes.
38 This behaviour can be changed (so libcurl does copy the data) by setting the
39 \fICURLOPT_COPYPOSTFIELDS(3)\fP option.
40
41 This POST is a normal application/x-www-form-urlencoded kind (and libcurl will
42 set that Content-Type by default when this option is used), which is commonly
43 used by HTML forms. Change Content-Type with \fICURLOPT_HTTPHEADER(3)\fP.
44
45 You can use \fIcurl_easy_escape(3)\fP to url-encode your data, if necessary. It
46 returns a pointer to an encoded string that can be passed as \fIpostdata\fP.
47
48 Using \fICURLOPT_POSTFIELDS(3)\fP implies setting \fICURLOPT_POST(3)\fP to 1.
49
50 If \fICURLOPT_POSTFIELDS(3)\fP is explicitly set to NULL then libcurl will get
51 the POST data from the read callback. If you want to send a zero-byte POST set
52 \fICURLOPT_POSTFIELDS(3)\fP to an empty string, or set \fICURLOPT_POST(3)\fP to
53 1 and \fICURLOPT_POSTFIELDSIZE(3)\fP to 0.
54
55 Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" header,
56 and libcurl will add that header automatically if the POST is either known to
57 be larger than 1024 bytes or if the expected size is unknown. You can disable
58 this header with \fICURLOPT_HTTPHEADER(3)\fP as usual.
59
60 To make multipart/formdata posts (aka RFC2388-posts), check out the
61 \fICURLOPT_HTTPPOST(3)\fP option combined with \fIcurl_formadd(3)\fP.
62 .SH DEFAULT
63 NULL
64 .SH PROTOCOLS
65 HTTP
66 .SH EXAMPLE
67 .nf
68 CURL *curl = curl_easy_init();
69 if(curl) {
70 const char *data = "data to send";
71
72 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
73
74 /* size of the POST data */
75 curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, 12L);
76
77 /* pass in a pointer to the data - libcurl will not copy */
78 curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
79
80 curl_easy_perform(curl);
81 }
82 .fi
83 .SH AVAILABILITY
84 Always
85 .SH RETURN VALUE
86 Returns CURLE_OK
87 .SH "SEE ALSO"
88 .BR CURLOPT_POSTFIELDSIZE "(3), " CURLOPT_READFUNCTION "(3), "