[ruby]URI::InvalidURIError (bad URI(is not URI?)

我遇到這個error是在irb裡使用open-uri都正常，但是改寫成rb檔時出現的

/usr/local/Cellar/ruby/2.3.1/lib/ruby/2.3.0/uri/rfc3986_parser.rb:67:in `split': bad URI(is not URI?): http://google.com.au (URI::InvalidURIError)

from /usr/local/Cellar/ruby/2.3.1/lib/ruby/2.3.0/uri/rfc3986_parser.rb:73:in `parse'

from /usr/local/Cellar/ruby/2.3.1/lib/ruby/2.3.0/uri/common.rb:227:in `parse'

from /usr/local/Cellar/ruby/2.3.1/lib/ruby/2.3.0/open-uri.rb:34:in `open'

from a.rb:16:in `<main>'

後來找到該解答如下

I got into trouble with URI.split (returning this error), I don't know if this helps you, but I will post here some warnings for also someone else having this error:

1. Check your url is not nil, and it's a valid one.
2. Do URI.encode(url) before URI.parse (to avoid special characters)
3. Do strip to the string you pass to URI.parse (to avoid leading and trailing whitespaces).

All in one:

uri = URI.parse(URI.encode(url.strip))

Related resource: http://www.practicalguile.com/2007/09/15/raising-uriinvalidurierror-from-a-perfectly-valid-uri/

解決方法：

puts "請輸入: "

html=gets.strip

在gets後面加上 .strip 去掉空白字元就行了