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58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// URLs provide a [uniform way to locate resources](https://adam.herokuapp.com/past/2010/3/30/urls_are_the_uniform_way_to_locate_resources/).
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// Here's how to parse URLs in Go.
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package main
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import (
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"fmt"
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"net"
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"net/url"
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)
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func main() {
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// We'll parse this example URL, which includes a
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// scheme, authentication info, host, port, path,
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// query params, and query fragment.
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s := "postgres://user:pass@host.com:5432/path?k=v#f"
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// Parse the URL and ensure there are no errors.
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u, err := url.Parse(s)
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if err != nil {
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panic(err)
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}
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// Accessing the scheme is straightforward.
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fmt.Println(u.Scheme)
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// `User` contains all authentication info; call
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// `Username` and `Password` on this for individual
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// values.
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fmt.Println(u.User)
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fmt.Println(u.User.Username())
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p, _ := u.User.Password()
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fmt.Println(p)
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// The `Host` contains both the hostname and the port,
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// if present. Use `SplitHostPort` to extract them.
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fmt.Println(u.Host)
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host, port, _ := net.SplitHostPort(u.Host)
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fmt.Println(host)
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fmt.Println(port)
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// Here we extract the `path` and the fragment after
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// the `#`.
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fmt.Println(u.Path)
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fmt.Println(u.Fragment)
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// To get query params in a string of `k=v` format,
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// use `RawQuery`. You can also parse query params
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// into a map. The parsed query param maps are from
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// strings to slices of strings, so index into `[0]`
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// if you only want the first value.
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fmt.Println(u.RawQuery)
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m, _ := url.ParseQuery(u.RawQuery)
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fmt.Println(m)
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fmt.Println(m["k"][0])
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}
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