1.net/url简介

import "net/url"
url包解析URL并实现查询转义

• URL结构体

// Note that the Path field is stored in decoded form: /%47%6f%2f becomes /Go/.
// A consequence is that it is impossible to tell which slashes in the Path were
// slashes in the raw URL and which were %2f. This distinction is rarely important,
// but when it is, code must not use Path directly.
// The Parse function sets both Path and RawPath in the URL it returns,
// and URL's String method uses RawPath if it is a valid encoding of Path,
// by calling the EscapedPath method.
type URL struct {
 Scheme string
 Opaque string // encoded opaque data
 User *Userinfo // username and password information
 Host string // host or host:port
 Path string // path (relative paths may omit leading slash)
 RawPath string // encoded path hint (see EscapedPath method)
 ForceQuery bool // append a query ('?') even if RawQuery is empty
 RawQuery string // encoded query values, without '?'
 Fragment string // fragment for references, without '#'
}

• func Parse(rawurl string) (*URL, error)
  将原生的rawurl字符串解析成URL结构体

package main
import (
 "fmt"
 "log"
 "net/url"
)
func main() {
 u, err := url.Parse("http://www.baidu.com/search?q=dotnet")
 if err != nil {
 log.Fatal(err)
 }
 u.Scheme = "https"
 u.Host = "google.com"
 q := u.Query()
 q.Set("q", "golang")
 u.RawQuery = q.Encode()
 fmt.Println(u)
}

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