URL提供了一種統(tǒng)一的方法來定位資源。 以下是在Go中解析網(wǎng)址的方法。這里將解析此示例URL，其中包括方案，身份驗證信息，主機，端口，路徑，查詢參數(shù)和查詢片段。
解析URL并確保沒有錯誤。
可參考示例中的代碼 -
所有的示例代碼，都放在
F:\worksp\golang目錄下。安裝Go編程環(huán)境請參考：http://www.yiibai.com/go/go_environment.html
url-parsing.go的完整代碼如下所示 -
package main
import "fmt"
import "net"
import "net/url"
func main() {
// We'll parse this example URL, which includes a
// scheme, authentication info, host, port, path,
// query params, and query fragment.
s := "postgres://user:pass@host.com:5432/path?k=v#f"
// Parse the URL and ensure there are no errors.
u, err := url.Parse(s)
if err != nil {
panic(err)
}
// Accessing the scheme is straightforward.
fmt.Println(u.Scheme)
// `User` contains all authentication info; call
// `Username` and `Password` on this for individual
// values.
fmt.Println(u.User)
fmt.Println(u.User.Username())
p, _ := u.User.Password()
fmt.Println(p)
// The `Host` contains both the hostname and the port,
// if present. Use `SplitHostPort` to extract them.
fmt.Println(u.Host)
host, port, _ := net.SplitHostPort(u.Host)
fmt.Println(host)
fmt.Println(port)
// Here we extract the `path` and the fragment after
// the `#`.
fmt.Println(u.Path)
fmt.Println(u.Fragment)
// To get query params in a string of `k=v` format,
// use `RawQuery`. You can also parse query params
// into a map. The parsed query param maps are from
// strings to slices of strings, so index into `[0]`
// if you only want the first value.
fmt.Println(u.RawQuery)
m, _ := url.ParseQuery(u.RawQuery)
fmt.Println(m)
fmt.Println(m["k"][0])
}
執(zhí)行上面代碼，將得到以下輸出結(jié)果 -
F:\worksp\golang>go run url-parsing.go
postgres
user:pass
user
pass
host.com:5432
host.com
5432
/path
f
k=v
map[k:[v]]
v
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