http.url

parse(url_str) -> parsed, err

Parse a URL into its component parts per RFC 2396

Decomposes a URL string into a table with the following fields (all nil when absent):

• scheme — e.g. "https"
• authority — e.g. "user:pass@host:443"
• userinfo — e.g. "user:pass"
• user — e.g. "user"
• password — e.g. "pass"
• host — e.g. "example.com" (IPv6 brackets stripped)
• port — e.g. "443" (string, not number)
• path — e.g. "/index.html"
• params — semicolon-separated parameters (RFC 2396 ;params)
• query — e.g. "key=val&foo=bar" (without leading ?)
• fragment — e.g. "section1" (without leading #)

Returns nil, "invalid url" for empty or nil input.