我会做这样的事情:

value = 'localhost:8393/foobar/1 test:foobartest'

value.split.first
#=> "localhost:8393/foobar/1"

或者如果您想使用正则表达式:

Or if you want to use an regexp:

value.sub(/ test.*/, '')
"localhost:8393/foobar/1"