浏览器在使用golang进行http.Get请求时返回空响应的问题

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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 main

import (
	"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 main

import (
"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()
}

huangapple
  • 本文由 发表于 2021年6月1日 16:55:44
  • 转载请务必保留本文链接:https://go.coder-hub.com/67785747.html
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