Missing classes of HttpBuilder in Groovy - groovy

Question

Here is simple request I try to do and watch response
def httpReq = new HTTPBuilder("http://${url}")
httpReq.request(Method.GET, ContentType.JSON) {
response.success = { resp ->
println("Ok " + resp.status.toString())
}
response.failure = { resp ->
println("Not ok" + resp.status.toString())
}
This returns an Error:
java.lang.ClassNotFoundException: org.apache.commons.collections.iterators.ArrayIterator
I think that ArrayIterator defined in jdk. I added manually org.apache.commons:commons-collections4:4.4 but it doesn't help.

Answer 1

TL;DR
Don't waste your time by gathering deps. Use a build tool like Gradle
or Maven - or use Groovys Grapes if only a script is needed and Groovy
is installed (or easily installable) on your target.
Using grape
You have to pick up all the transitive dependencies (this means the correct packages with the correct versions). E.g. with #Grab:
#Grab('org.codehaus.groovy.modules.http-builder:http-builder:0.7.1')
import groovyx.net.http.HTTPBuilder
def http = new HTTPBuilder('http://www.google.com')
def html = http.get( path : '/search', query : [q:'Groovy'] )
If you really want to gather all the deps manually grape can also
help. It can tell you, what jars are needed:
% grape resolve org.codehaus.groovy.modules.http-builder http-builder 0.7.1
$HOME/.groovy/grapes/org.codehaus.groovy.modules.http-builder/http-builder/jars/http-builder-0.7.1.jar
$HOME/.groovy/grapes/org.apache.httpcomponents/httpclient/jars/httpclient-4.2.1.jar
$HOME/.groovy/grapes/org.apache.httpcomponents/httpcore/jars/httpcore-4.2.1.jar
$HOME/.groovy/grapes/commons-logging/commons-logging/jars/commons-logging-1.1.1.jar
$HOME/.groovy/grapes/commons-codec/commons-codec/jars/commons-codec-1.6.jar
$HOME/.groovy/grapes/net.sf.json-lib/json-lib/jars/json-lib-2.3-jdk15.jar
$HOME/.groovy/grapes/commons-beanutils/commons-beanutils/jars/commons-beanutils-1.8.0.jar
$HOME/.groovy/grapes/commons-collections/commons-collections/jars/commons-collections-3.2.1.jar
$HOME/.groovy/grapes/commons-lang/commons-lang/jars/commons-lang-2.4.jar
$HOME/.groovy/grapes/net.sf.ezmorph/ezmorph/jars/ezmorph-1.0.6.jar
$HOME/.groovy/grapes/net.sourceforge.nekohtml/nekohtml/jars/nekohtml-1.9.16.jar
$HOME/.groovy/grapes/xerces/xercesImpl/jars/xercesImpl-2.9.1.jar
$HOME/.groovy/grapes/xml-apis/xml-apis/jars/xml-apis-1.3.04.jar
$HOME/.groovy/grapes/xml-resolver/xml-resolver/jars/xml-resolver-1.2.jar
From this list you can build up your own classpath to pass to groovy and
work without grape. E.g.:
% cat no-grape.groovy
import groovyx.net.http.HTTPBuilder
def http = new HTTPBuilder('http://www.google.com')
def html = http.get( path : '/search', query : [q:'Groovy'] )
% groovy -cp `grape resolve org.codehaus.groovy.modules.http-builder http-builder 0.7.1 | paste -s -d:` no-grape.groovy
...