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Some CURLOPT constants defined in the curl public headers were initially enums (= ints), or macros with bare numeric values. Recent curl releases upgraded them to `long` constants, to make them pass correctly to `curl_easy_setop()` by default, i.e. without requiring a `(long)` cast. This patch drops such casts from the examples embedded in the docs. At the same time it documents which curl release made them `long` types, to keep them useful when working with previous libcurl versions. Also: - drop a `(long)` cast that was never necessary. - CURLOPT_ALTSVC_CTRL.md: bump local copy of macros to long. - test1119: make it ignore symbols ending with an underscore, to skip wildcard, e.g. `**CURLAUTH_***`. Closes #18130
73 lines
1.5 KiB
Markdown
73 lines
1.5 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_POSTFIELDSIZE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_POSTFIELDS (3)
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- CURLOPT_POSTFIELDSIZE_LARGE (3)
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Protocol:
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- HTTP
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Added-in: 7.2
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---
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# NAME
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CURLOPT_POSTFIELDSIZE - size of POST data pointed to
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDSIZE, long size);
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~~~
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# DESCRIPTION
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If you want to post static data to the server without having libcurl do a
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strlen() to measure the data size, this option must be used. When this option
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is used you can post fully binary data, which otherwise is likely to fail. If
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this size is set to -1, libcurl uses strlen() to get the size or relies on the
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CURLOPT_READFUNCTION(3) (if used) to signal the end of data.
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If you post more than 2GB, use CURLOPT_POSTFIELDSIZE_LARGE(3).
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# DEFAULT
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-1
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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#include <string.h> /* for strlen */
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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const char *data = "data to send";
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* size of the POST data */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)strlen(data));
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
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curl_easy_perform(curl);
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}
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}
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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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