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I've tried the following to send a line break with curl, but \n is not interpreted by curl.
curl -X PUT -d "my message\n" http://localhost:8000/hello How can I send a line break with curl?
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The newline character is \n in JavaScript and many other languages. All you need to do is add \n character whenever you require a line break to add a new line to a string.
To make a POST request with Curl, you can run the Curl command-line tool with the -d or --data command-line option and pass the data as the second argument. Curl will automatically select the HTTP POST method and application/x-www-form-urlencoded content type for the transmitted data.
--data-binary is a curl SPECIFIC flag for curl itself. it has nothing to do with HTTP web services call specifically, but it's how you "POST" data to the call in the HTTP BODY instead of in the header WHEN using curl.
Sometimes you want to provide the data to be sent verbatim.
The --data-binary option does that.
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Your shell is passing \ followed by n rather than a newline to curl rather than "my message\n". Bash has support for another string syntax that supports escape sequences like \n and \t. To use it, start the string with $' and end the string with ':
curl -X PUT -d $'my message\n' http://localhost:8000/hello See ANSI-C Quoting in the Bash Reference Manual
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