Jenkins custom pipeline and how to add property to be set in jenkinsfile - jenkins-pipeline

Question

I'm trying to create a custom pipeline with groovy but I can't find anywhere on the web where it is discussed how to add a property that can be set in the jenkinsfile. I'm trying to add a curl command but need the URL to be set in the jenkinsfile because it will be different for each build.
Can anyone explain how that should be done or links where it has been discussed?
Example Jenkinsfile:
msBuildPipelinePlugin
{
curl_url = "http://webhook.url.com"
}
custom pipeline groovy code:
def response = sh(script: 'curl -i -X POST -H 'Content-Type: application/json' -d '{"text","Jenkins Info.\nThis is more text"}' curl_url, returnStdout: true)
Thanks

Answer 1

If you want to specify the URL as a string during every build, you can do either of the following:
Declarative Pipeline
Use the parameters {} directive:
pipeline {
agent {
label 'rhel-7'
}
parameters {
string(
name: 'CURL_URL',
defaultValue: 'http://www.google.com',
description: 'Enter the URL for file download'
)
}
stages {
stage('download-file') {
steps {
echo "The URL is ${params.CURL_URL}"
}
}
}
}
Scripted Pipeline
Use the properties([parameters([...])]) step:
parameters([
string(
name: 'CURL_URL',
defaultValue: 'http://www.google.com',
description: 'Enter the URL for file download'
)
])
node('rhel-7') {
stage('download-file') {
echo "The URL is ${params.CURL_URL}"
}
}
You can choose to leave the values of defaultValue and description empty.
Job GUI
Either of the above syntax will be rendered in the GUI as:

Answer 2

I got it to work using
//response is just the output of the curl statement
def response = ["curl", "-i", "-v", "-X", "POST", "--data-urlencode", "payload={\"text\":\"message body\"}", "curl url goes here"].execute().text
Thanks