web_server_ex

#!/bin/bash
#
# This example illustrates a way to implement a simple web server.

readonly DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
. ${DIR}/../gobash


# A handle function that will be invoked when user asks for /date.
function handle_date() {
        local -r res="${1}"
        local -r req="${2}"
        shift 2

        $res write "Sending this date back: $(date)"
}

function main() {
        # Address and port to listen on.
        local -r address="127.0.0.1"
        local -r -i port=9003

        # Create an Http instance.
        local -r http=$(Http "${address}" "${port}")

        # The next line adds a handler for /date. The first argument
        # is `path` to be handled. The second argument is the script
        # that contains the function that will handle the request; the
        # function name is given as the third argument. (Providing the
        # second script is needed, because handling is done in a
        # subshell, so we need to know what script to run in addition
        # to the function.)
        $http handle_func "/date" "${DIR}/$(basename ${BASH_SOURCE})" "handle_date"

        # Start listening and serving (creates a sub process) and wait
        # for the sub process to finish.
        $http listen_and_serve_and_wait
}

if [[ "${0}" == *"web_server_ex" ]]; then
        http_enabled || \
                { echo "http is not enabled"; exit 0; }
        main "$@"
fi

# Once you start this script, you can go to another terminal and curl
# (or any other way you like):
# curl -v http://127.0.0.1:9003/date # 200 OK
# curl -v http://127.0.0.1:9003/none # 404 Not Found