Execute Command using `Process` in Jenkins Groovy Pipeline - jenkins

Question

I am executing a cURL command using sh command with no issue.
pulic uploadArtifct (String user, String password, String file, String
location) {
def cred = "${user}:${password}"
def cmd = "curl -v -u cred --upload-file ${file} ${location}"
sh cmd
}
However, when I try to execute the same cmd, using the Process object. I get an error:
public uploadArtifct (String user, String password, String file, String
location) {
def cred = "${user}:${password}"
def cmd = "curl -v -u cred --upload-file ${file} ${location}"
try {
def sout = new StringBuffer(), serr = new StringBuffer()
def proc = cmd.execute()
proc.consumeProcessOutput(sout, serr)
proc.waitForOrKill(1000)
println sout
} catch (Exception e) {
throw new RuntimeExceptipon("Cannot execute curl, exception: [${e.getClass().getName()} - '${e.getMessage()}']")
}
}
The error that I see is:
java.lang.RuntimeException: Cannot execute curl, exception: [java.lang.RuntimeException - 'Error running; stdout='', stderr='curl: Can't open 'Folder/artifact/file.zip'!
curl: try 'curl --help' or 'curl --manual' for more information
'']
What is it about Process.execute() that does not work. Am I missing something?

Answer 1

I ran into a similar issue half a year ago. As i found out , the curl request that you run using the sh command is executed on the agent where the build is run
sh cmd //this runs on the agent and hence finds the ${file}
However the second piece of code
def proc = cmd.execute() . //This is run on the master and hence it cannot find the ${file}
When you use groovy classes, it is by design to be executed on the master node. This is because the groovy engine that Jenkins uses is on the master