go发送多维数组的form格式的post请求

就是发送如下php格式application/x-www-form-urlencoded的post请求

$form_params=array (
  'r_list' =>
  array (
    0 => 
    array (
      'r_address' => 'r_address',
      'r_city' => 'r_city',
      'r_district' => 'r_district',
      'r_mobile' => 'r_mobile',
      'r_name' => '收货人',
      'r_province' => 'r_province',
      'shop_order' => 'shop_order',
    ),
    1 => 
    array (
      'r_address' => 'r_address2',
      'r_city' => 'r_city2',
      'r_district' => 'r_district2',
      'r_mobile' => 'r_mobile2',
      'r_name' => '收货人1',
      'r_province' => 'r_province2',
      'shop_order' => 'shop_order2',
    ),
  ),
  'send_address' => 'send_address',
  'send_city' => 'send_city',
  'send_district' => 'send_district',
  'send_mobile' => 'send_mobile',
  'send_name' => 'send_name',
  'send_province' => 'send_province',
  'username' => 'nanyounan',
)
$client = new Client();
$request = new Request('POST', 'xxxxxxx', [
     'form_params' => $form_params
 ]);

细分为下面的几个问题

1. go和php的接收差异
   go在请求时吧map[key][]value 转成了key=value1&key=value2，而不是key[0]=value1&key[1]=value2，这样php在接收时只能接受到一个value
2. go的form格式的post请求限制
   go在把form格式的post请求进行转码的时候,很多都是只解析表层,例如:
   如果遇到一维数组的话,他是解析成key=value1&key=value2
   如果遇到二维数组的话,他解析失败,因为解析键值对(key=value)的时候,默认的值(value)是字符串,不是数组.但是二维数组键值对的值是一个数组(map类型),go就会解析失败

ploady:=make(url.Values)
ploady.Set("send_name",sendName)
ploady.Set("send_mobile",sendMobile)
ploady.Set("send_province",sendProvince)
ploady.Set("send_province",sendProvince)
ploady.Set("send_city",sendCity)
ploady.Set("send_district",sendDistrict)
ploady.Set("send_address",sendAddress)
for i, n := 0, len(rList); i < n; i++ { // 常见的 for 循环，支持初始化语句。
	for key, v := range rList[i] {  //循环数组
		valueToString := v.(string) //ploady.set方法只能是字符串,把value值从interface类型转为string类型,避免
		ploady.Set(fmt.Sprintf("%s%d%s%s%s","r_list[",i,"][",key,"]"),valueToString)
	}
}
res := newHttpPostForm("/api/buyOrders", ploady)
	
func newHttpPostForm(postUrl string, payload url.Values) map[string]interface{}{
	fmt.Println(payload)
	resp, _ := http.PostForm("http://127.0.0.1:8080/open/app",payload)
	defer resp.Body.Close()
	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Println(string(body))
	var res map[string]interface{}
	_ = json.Unmarshal(body, &res)
	return res
}

如果以上方式不适用的话,可以通过php的http_build_query方法获取post请求值的转码,然后通过go的url.QueryUnescape方法获取到具体的格式,然后自己编写字符串