Golang urlencode与urldecode编码解码

2019年11月12日 发表评论 阅读评论

一、urlencode

golang下可以使用net/url模块实现urlencode和urldecode操作。具体实现的函数为url.QueryEscape和url.QueryUnescape,代码如下:

package main
import(
    "fmt"
    "net/url"
)
func main()  {
    var urlStr string = "运维之路"
    escapeUrl := url.QueryEscape(urlStr)
    fmt.Println("编码:",escapeUrl)
    enEscapeUrl, _ := url.QueryUnescape(escapeUrl)
    fmt.Println("解码:",enEscapeUrl)
}

如果涉及到多个参数转码的,这在get和post请求中都有,比如id=100&site=361way.com这样的。可以在通过url.Values进行增加后转码,发下:

package main
import (
	"fmt"
	"net/url"
)
func main() {
	params := url.Values{}
	params.Add("name", "@Rajeev")
	params.Add("phone", "+919999999999")
	fmt.Println(params.Encode())
}
#输出:
name=%40Rajeev&phone=%2B919999999999

同样的,我们通过url的其他函数处理操作过后,一个典型的get请求的URL如下:

package main
import (
	"fmt"
	"net/url"
)
func main() {
	// Let's start with a base url
	baseUrl, err := url.Parse("http://www.mywebsite.com")
	if err != nil {
		fmt.Println("Malformed URL: ", err.Error())
		return
	}
	// Add a Path Segment (Path segment is automatically escaped)
	baseUrl.Path += "path with?reserved characters"
	// Prepare Query Parameters
	params := url.Values{}
	params.Add("q", "Hello World")
	params.Add("u", "@rajeev")
	// Add Query Parameters to the URL
	baseUrl.RawQuery = params.Encode() // Escape Query Parameters
	fmt.Printf("Encoded URL is %q\n", baseUrl.String())
}
#输出结果
Encoded URL is "http://www.mywebsite.com/path%20with%3Freserved%20characters?q=Hello+World&u=%40rajeev"

二、urldecode

简单的url解码,直接使用Unescape就可以了,如下:

package main
import (
	"fmt"
	"log"
	"net/url"
)
func main() {
	encodedValue := "Hell%C3%B6+W%C3%B6rld%40Golang"
	decodedValue, err := url.QueryUnescape(encodedValue)
	if err != nil {
		log.Fatal(err)
		return
	}
	fmt.Println(decodedValue)
}

带form 参数,就像上面提到的"param1=value1¶m2=value2"这种格式的可以使用url.ParseQuery()参数解析成map[string][]string格式,如下:

package main
import (
	"fmt"
	"log"
	"net/url"
)
func main() {
	queryStr := "name=Rajeev%20Singh&phone=%2B9199999999&phone=%2B628888888888"
	params, err := url.ParseQuery(queryStr)
	if err != nil {
		log.Fatal(err)
		return
	}
	fmt.Println("Query Params: ")
	for key, value := range params {
		fmt.Printf("  %v = %v\n", key, value)
	}
}
#其输出为:
Query Params:
  name = [Rajeev Singh]
  phone = [+9199999999 +628888888888]

一个get请求类,后面带参数的URL,可以通过如下方式解析并解码

package main
import (
	"fmt"
	"log"
	"net/url"
)
func main() {
	u, err := url.Parse("https://www.website.com/person?name=Rajeev%20Singh&phone=%2B919999999999&phone=%2B628888888888")
	if err != nil {
		log.Fatal(err)
		return
	}
	fmt.Println("Scheme: ", u.Scheme)
	fmt.Println("Host: ", u.Host)
	queries := u.Query()
	fmt.Println("Query Strings: ")
	for key, value := range queries {
		fmt.Printf("  %v = %v\n", key, value)
	}
	fmt.Println("Path: ", u.Path)
}
# 输出如下:
Scheme:  https
Host:  www.website.com
Query Strings:
  phone = [+919999999999 +628888888888]
  name = [Rajeev Singh]
Path:  /person




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