英文:
How to read multiple parameters from a URL
问题
我有一个反向代理API，它读取本地主机API调用的参数，然后将这些参数发送到第三方API。
如果我只使用一个参数，我可以正确地使其工作。像这样：
http://localhost:8080/path?page=1
然而，我希望能够像这样使用多个参数：
http://localhost:8080/path?page=1¶m=x
请参考下面的代码：
这个函数捕获一个HTTP请求，然后将这些参数发送到另一个API。
func (s *Server) getReverseProxy(w http.ResponseWriter, r *http.Request) {// 当我尝试在列表中附加另一个查询（与page一起），我会得到一个错误keys, ok := r.URL.Query()["page"]if !ok || len(keys[0]) < 1 {log.Println("Url Param 'page' is missing")return}// Query()["key"]将返回一个项目数组，// 我们只想要单个项目。key := keys[0]log.Println("Url Param 'page' is: " + string(key))params := url.Values{"page[size]": []string{"100"},"page[number]": []string{""},}u := &url.URL{Scheme: "https",Host: "url.com",Path: "/path",RawQuery: params.Encode(),}}
在不进行重构的情况下，我是否遗漏了一些简单的东西？我如何为我的函数添加另一个参数来捕获？
英文:
I have a reverse proxy API that reads the parameters of a localhost API call and then sends those parameters to a 3rd party API.
I'm able to get this working correctly if I only use one parameter. Like so:
http://localhost:8080/path?page=1
I want to be able to use more than one parameter however like so:
http://localhost:8080/path?page=1&param=x
Please see my code below:
This function catches an HTTP request and then sends those parameters to another API.
func (s *Server) getReverseProxy(w http.ResponseWriter, r *http.Request) {// when I try to append another query in the list a long with page, I get an errorkeys, ok := r.URL.Query()["page"]if !ok || len(keys[0]) < 1 {log.Println("Url Param 'page' is missing")return}// Query()["key"] will return an array of items,// we only want the single item.key := keys[0]log.Println("Url Param 'page' is: " + string(key))params := url.Values{"page[size]": []string{"100"},"page[number]": []string{""},}u := &url.URL{Scheme: "https",Host: "url.com",Path: "/path",RawQuery: params.Encode(),}}
Without having to refractor, am I missing something simple here? How can I add another parameter for my function to catch?
答案1
得分: 1
r.URL.Query() 返回一个 map[string][]string。
你可以这样做：
keys, ok := r.URL.Query()// 通过以下方式浏览 keyskeys["params"]keys["page"]
英文:
r.URL.Query() returns a map[string][]string
you can do a
keys, ok := r.URL.Query()//browse through keys bykeys["params"]keys["page"]
答案2
得分: 1
下面的代码行...
keys, ok := r.URL.Query()["page"]
它返回page参数的值，但是以[]string类型返回。要检索更多的参数，只需添加类似的语句，但使用不同的参数名称。例如：
keysPage, ok := r.URL.Query()["page"]keysParamA, ok := r.URL.Query()["ParamA"]keysParamB, ok := r.URL.Query()["ParamB"]keysParamC, ok := r.URL.Query()["ParamC"]
或者，你也可以使用r.URL.Query().Get(key)以string类型返回参数值。
page := r.URL.Query().Get("page")paramA := r.URL.Query().Get("ParamA")paramB := r.URL.Query().Get("ParamB")paramC := r.URL.Query().Get("ParamC")
英文:
The line of code below ...
keys, ok := r.URL.Query()["page"]
it returns the param value of page, but in []string type. To retrieve more params, simply add similar statement with different param name. for example:
keysPage, ok := r.URL.Query()["page"]keysParamA, ok := r.URL.Query()["ParamA"]keysParamB, ok := r.URL.Query()["ParamB"]keysParamC, ok := r.URL.Query()["ParamC"]
Or, you can also use the r.URL.Query().Get(key) to return the param value in string type.
page := r.URL.Query().Get("page")paramA := r.URL.Query().Get("ParamA")paramB := r.URL.Query().Get("ParamB")paramC := r.URL.Query().Get("ParamC")
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