mirror of
https://github.com/curl/curl.git
synced 2024-12-21 06:50:10 +08:00
51 lines
2.0 KiB
D
51 lines
2.0 KiB
D
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Long: variable
|
||
|
|
Arg: <[%]name=text/@file>
|
||
|
|
Help: Set variable
|
||
|
|
Category: curl
|
||
|
|
Example: --variable name=smith $URL
|
||
|
|
Added: 8.3.0
|
||
|
|
See-also: config
|
||
|
|
Multi: append
|
||
|
|
---
|
||
|
|
Set a variable with "name=content" or "name@file" (where "file" can be stdin
|
||
|
|
if set to a single dash (-)). The name is a case sensitive identifier that
|
||
|
|
must consist of no other letters than a-z, A-Z, 0-9 or underscore. The
|
||
|
|
specified content is then associated with this identifier.
|
||
|
|
|
||
|
|
The name must be unique within a command line invoke, setting the same
|
||
|
|
variable name again will be ignored.
|
||
|
|
|
||
|
|
The contents of a variable can be referenced in a later command line option
|
||
|
|
when that option name is prefixed with "--expand-", and the name is used as
|
||
|
|
"{{name}}" (without the quotes).
|
||
|
|
|
||
|
|
--variable can import environment variables into the name space. Opt to either
|
||
|
|
require the environment variable to be set or provide a default value for the
|
||
|
|
variable in case it is not already set.
|
||
|
|
|
||
|
|
--variable %name imports the variable called 'name' but exits with an error if
|
||
|
|
that environment variable is not alreadty set. To provide a default value if
|
||
|
|
the environment variable is not set, use --variable %name=content or
|
||
|
|
--variable %name@content. Note that on some systems - but not all -
|
||
|
|
environment variables are case insensitive.
|
||
|
|
|
||
|
|
When expanding variables, curl supports a set of functions that can make the
|
||
|
|
variable contents more convenient to use. You apply a function to a variable
|
||
|
|
expansion by adding a colon and then list the desired functions in a
|
||
|
|
comma-separted list that is evaluated in a left-to-right order. Variable
|
||
|
|
content holding null bytes that are not encoded when expanded, will cause
|
||
|
|
error.
|
||
|
|
|
||
|
|
These are functions that can help you get the value inserted more
|
||
|
|
conveniently.
|
||
|
|
|
||
|
|
"trim" removes all leading and trailing white space.
|
||
|
|
|
||
|
|
"json" outputs the content using JSON string quoting rules.
|
||
|
|
|
||
|
|
"url" shows the content URL (percent) encoded.
|
||
|
|
|
||
|
|
"b64" expands the variable base64 encoded
|