curl/docs/cmdline-opts/data-urlencode.d

c: Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: data-urlencode
Arg: <data>
Help: HTTP POST data URL encoded
Protocols: HTTP
See-also: data data-raw
Added: 7.18.0
Category: http post upload
Example: --data-urlencode name=val $URL
Example: --data-urlencode =encodethis $URL
Example: --data-urlencode name@file $URL
Example: --data-urlencode @fileonly $URL
---
This posts data, similar to the other --data options with the exception
that this performs URL-encoding.

To be CGI-compliant, the <data> part should begin with a *name* followed
by a separator and a content specification. The <data> part can be passed to
curl using one of the following syntaxes:
.RS
.IP "content"
This will make curl URL-encode the content and pass that on. Just be careful
so that the content does not contain any = or @ symbols, as that will then make
the syntax match one of the other cases below!
.IP "=content"
This will make curl URL-encode the content and pass that on. The preceding =
symbol is not included in the data.
.IP "name=content"
This will make curl URL-encode the content part and pass that on. Note that
the name part is expected to be URL-encoded already.
.IP "@filename"
This will make curl load data from the given file (including any newlines),
URL-encode that data and pass it on in the POST.
.IP "name@filename"
This will make curl load data from the given file (including any newlines),
URL-encode that data and pass it on in the POST. The name part gets an equal
sign appended, resulting in *name=urlencoded-file-content*. Note that the
name is expected to be URL-encoded already.
.RE