Look around for any non-alphabetic character in URI. For me, it was a space char before 'https'. ... <看更多>

The exception specifically calls out 'scheme' being "non-alphabetic", which is true if you're trying to connect to a raw IP "URI" like '8.8.8.8' ... ... <看更多>

Based on DLMcMMayhem's hint, I found that following search will do what you need: /\A*\zs\a. \A* searches for zero or more non-alphabetic characters ... ... <看更多>