¿Cómo se configura una variable en el comando curl?

How do you set a variable in curl command?

Three ways to pass the environment variables

1. 1 Add a single quote and a double quote around the variable. $ curl -X POST https://requestbin.io/1bk0un41 -H “Content-Type: application/json” -d ‘{ “property1″:”‘”$TERM”‘”, “property2″:”value2” }’
2. 2 Escaping double quote.
3. 3 Use a data generation function.

The Curl language naming conventions for variables suggest using lowercase letters and a hyphen to join multiple words (for example, variable-name). is the data type of the variable or constant. Specify any valid data type. type is required if value is not specified.

Also note that curl, the command line tool, supports a set of additional environment variables independently of this. A URL like “https://example.com” will hence use the “http_proxy” variable, while a URL like “ftp://example.com” will use the “ftp_proxy” variable.

An HTTP proxy is a proxy that the client speaks HTTP with to get the transfer done. curl will, by default, assume that a host you point out with -x or –proxy is an HTTP proxy, and unless you also specify a port number it will default to port 1080 (and the reason for that particular port number is purely historical).

The syntax for the curl command is as follows: curl [options] [URL…] In its simplest form, when invoked without any option, curl displays the specified resource to the standard output. The command will print the source code of the example.com homepage in your terminal window.

When following redirects is enabled, curl will follow up to 50 redirects by default. There’s a maximum limit mostly to avoid the risk of getting caught in endless loops. If 50 is not sufficient for you, you can change the maximum number of redirects to follow with the –max-redirs option.

You can get around this by ending the string literal, adding the variable and then starting the string literal again: The extra double quotes around the variable are used to prevent unwanted shell parameter expansion. @ByteCommander’s answer is good, assuming you know that the value of name is a properly escaped JSON string literal.

The usage is super simple. The mock API server will be ready after clicking the button. Run the below command to make a POST request: Refresh the web and confirm the status: Run printenv will show the environment variable:

Another interesting thing to note here is that the default proxy protocol is http. Thus, following two commands will do exactly the same: Another way to use proxy with curl is to set the environment variables http_proxy and https_proxy . Note that setting proxy using environment variables works only with MacOS and Linux.

The following Bash script puts the data being passed to cURL into a text file then uses sed to convert special characters to their Unicode equivalents before recalling the data from the text file (using cat) and placing it back into the variable which is passed to cURL: #! /bin/bash # Put the form fill data into the $DATA variable.