Support authentication and SSL connections to NiFi

[davetorok]

currently no way to deploy to an authenticated and SSL-enabled NiFi instance. Should allow for a username/password to be supplied securely (env properties preferred, or prompt for interactive access)

TEMPORARY WORKAROUND FOR GROOVY DEPLOY

• Log into NiFi through the normal brower
• in Chrome, open the Developer Tools
• Look for some of the rest requests, you want the "Authorization: Bearer asdfasdfasdfasdf" request header
• In NiFiDeploy.groovy around line 560, add the "ignoreSSLIssues" and "defaultRequestHeaders" lines
• nifi = new RESTClient("$nifiHostPort/nifi-api/")
• nifi.ignoreSSLIssues()
• nifi.defaultRequestHeaders.'Authorization' = "Bearer blahblahblahUzI1NiJ9.eJhd(the whole token here"
• groovy NiFiDeploy.groovy --file "/tmp/nifi-deploy.staging.withcreds.yml" --nifi-api "https:/MYSECUREHOST:8443/" --template "file:///tmp/nifi-deploy.xml"

[simonellistonball]

This should be fixed by https://github.com/aperepel/nifi-api-deploy/pull/31 if you are using ssl client certificates for authentication. For kerberos, or basic auth, that will need a little extra work.