英文:
Browser return empty response with golang when doing http.Get in rest API
问题
尝试在执行http.Get时捕获错误，但如果远程服务器出现错误，比如没有响应、DNS名称无法解析，浏览器会返回空响应。正确的做法是什么？
示例代码：
func GetStatus(w http.ResponseWriter, r *http.Request){resp,err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w,"Remote server ok !")} else {fmt.Fprint(w,"Remote server error")}}func handleRequests() {http.HandleFunc("/status", GetStatus)log.Fatal(http.ListenAndServe(":10000",nil))}func main() {handleRequests()}
当在浏览器中打开localhost:10000/status时，会得到以下错误：
localhost didn’t send any data. ERR_EMPTY_RESPONSE
但如果URL正确，一切正常，尝试使用defer和其他方式捕获错误，但没有起作用，仍然返回空响应。
请帮忙解决。
英文:
Trying catch error when doing http.Get but if remote server has error like no answer, DNS name not resolved it returns empty response in browser. What a right for way doing that?
Example:
func GetStatus(w http.ResponseWriter, r *http.Request){resp,err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w,"Remote server ok !")} else {fmt.Fprint(w,"Remote server error")}}func handleRequests() {http.HandleFunc("/status", GetStatus)log.Fatal(http.ListenAndServe(":10000",nil))}func main() {handleRequests()}
And when open browser localhost:10000/status get :
localhost didn’t send any data. ERR_EMPTY_RESPONSE
But if url ok , everything ok trying use defer , few kind of catch error. Not working. Give empty response
Please help
答案1
得分: 0
GetStatus函数中的错误检查是不正确的，并且你引入了一个未使用的局部变量。请按照以下方式修复代码：
func GetStatus(w http.ResponseWriter, r *http.Request) {_, err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w, "远程服务器错误")} else {fmt.Fprint(w, "远程服务器正常！")}}
尝试使用curl localhost:10000/status在本地访问该服务。你应该会收到其中一个远程服务器...的消息。
你需要进行更多的调整才能创建一个可工作的HTTP服务，但是请先尝试上述代码以确保最初的工作。
英文:
The error check in the GetStatus function is incorrect and you introduced a local variable that you are not using. Please fix the code as follows:
func GetStatus(w http.ResponseWriter, r *http.Request) {_, err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w, "Remote server error")} else {fmt.Fprint(w, "Remote server ok !")}}
Try accessing the service locally using curl localhost:10000/status. You should receive one of the Remote server... messages.
You will need to make more adjustments to create a working HTTP service, but please try the above code just to make things working initially.
答案2
得分: 0
package mainimport ("fmt""log""net/http")func GetStatus(w http.ResponseWriter, r *http.Request) {_, err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w, "远程服务器错误")} else {fmt.Fprint(w, "远程服务器正常！")}}func handleRequests() {http.HandleFunc("/status", GetStatus)log.Fatal(http.ListenAndServe(":10000", nil))}func main() {handleRequests()}
以上是要翻译的代码部分。
英文:
package mainimport ("fmt""log""net/http")func GetStatus(w http.ResponseWriter, r *http.Request){_,err := http.Get("https://goodsfdsfgle.com")if err != nil {fmt.Fprint(w,"Remote server error")} else {fmt.Fprint(w,"Remote server ok!")}}func handleRequests() {http.HandleFunc("/status", GetStatus)log.Fatal(http.ListenAndServe(":10000",nil))}func main() {handleRequests()}
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