Golang urlencode与urldecode编码解码

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:



<br />
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:



<br />
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:



<br />
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:



<br />
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:



<br />
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



<br />
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
<br />

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