如何在Golang中建立URL/查询 [英] How to build a URL / Query in Golang

问题描述

背景-

我需要根据用于表单调用的表单中的用户输入来构建URL/查询.

I need to build a URL / query based on user input from a form that will be used to make an API call.

问题-

构建URL时，无法正确转义参数.例如，查询"bad santa"最终在它们之间有一个空格，而不是"+".

When building the URL, the params are not properly escaped. For example, the query "bad santa" ends up with a space between it instead of "+".

电流输出-

例如 https://api.example.org/3/search/movie?query=不好santa& api_key = #######

e.g. https://api.example.org/3/search/movie?query=bad santa&api_key=#######

预期输出-

例如 https://api.example.org/3/search/movie?query=bad+santa&api_key=########

代码示例-

根URL-

var SearchUrl = "https://www.example.org/3/search/movie?query="

获取从用户输入中获取的参数-

Get params taken from user input -

var MovieSearch []string = r.Form["GetSearchKey"]  

API密钥-

var apiKey = "&api_key=######"

我正在使用 ArrayToString()来解析表单输入数据

I am using the ArrayToString() to parse the form input data

func ArrayToString(array []string) string{
    str := strings.Join(array, "+")
    return str 
}

然后构建URL-

var SearchUrl = "https://api.example.org/3/search/movie?query="
var MovieSearch []string = r.Form["GetSearchKey"]  
var apiKey = "&api_key=########"
UrlBuild := []string {SearchUrl, ArrayToString(MovieSearch), apiKey}
OUTPUT_STRING := ArrayToString(UrlBuild)

问题-

如何使用正确输入的用户输入GET参数构建URL?

How to build a URL with user input GET params that are escaped properly?

推荐答案

通常，应该使用url包的值.

Normally, one should use url package's Values.

这是一个示例，它满足了我的要求，在播放中既是简单的main，又是http.HandlerFunc形式:

Here's an example, that does what I think you want, on play Both a simple main, and in http.HandlerFunc form:

package main

import "fmt"
import "net/url"
import "net/http"

func main() {
    baseURL := "https://www.example.org/3/search/movie"
    v := url.Values{}
    v.Set("query", "this is a value")
    perform := baseURL + "?" + v.Encode()
    fmt.Println("Perform:", perform)
}

func formHandler(w http.ResponseWriter, r *http.Request) {
    baseURL := "https://www.example.org/3/search/movie"
    v := url.Values{}

    v.Set("query", r.Form.Get("GetSearchKey")) // take GetSearchKey from submitted form
    v.Set("api_ley", "YOURKEY") // whatever your api key is

    perform := baseURL + "?" + v.Encode() // put it all together
    fmt.Println("Perform:", perform) // do something with it
}

输出:执行:https://www.example.org/3/search/movie?query=this+is+a+value

请注意如何为您正确地将值放入查询字符串中.

Notice how the values are put in to query string, properly escaped, for you.

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