英文:
Go Webserver Not Handling POST Requests
问题
我正在使用Go的http包创建一个简单的Web服务器。我只注册了一个处理程序，用于处理路径为"/requests/"的请求。
它可以很好地处理GET请求，但是当我发送POST请求时，处理程序从未被调用，客户端会收到301 Moved Permanently的响应。
我尝试搜索了一下，但似乎这不是人们常遇到的问题。
我的处理程序如下：
func requestHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello")
}
主函数如下：
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/requests/", requestHandler)
http.ListenAndServe(":8000", mux)
}
使用Curl命令会得到以下输出：
>> curl -i -X POST http://localhost:8000/requests
HTTP/1.1 301 Moved Permanently
Location: /requests/
Date: Thu, 12 Jan 2017 08:51:10 GMT
Content-Length: 0
Content-Type: text/plain; charset=utf-8
Go自带的http客户端返回类似的响应对象：
&{301 Moved Permanently 301 HTTP/1.1 1 1 map[Content-Type:[text/plain; charset=utf-8] Location:[/requests/] Date:[Thu, 12 Jan 2017 08:51:58 GMT] Content-Length:[0]] 0x339190 0 [] false false map[] 0xc4200cc0f0 <nil>}
再次强调，GET请求的行为与我预期的一样，并调用了处理程序函数。我需要做一些不同的事情来处理POST请求吗？谢谢您的帮助！
英文:
I'm creating a simple web server using Go's http package. I'm registering just one handler, for requests to the path "/requests/".
It can handle GET requests just fine but when I send a POST request, the handler is never invoked and the client gets a 301 Moved Permanently response.
I've tried searching for this but it appears this isn't a problem people are commonly facing.
My handler is:
func requestHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello")
}
main function:
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/requests/", requestHandler)
http.ListenAndServe(":8000", mux)
}
Curl gives the following output:
>> curl -i -X POST http://localhost:8000/requests
HTTP/1.1 301 Moved Permanently
Location: /requests/
Date: Thu, 12 Jan 2017 08:51:10 GMT
Content-Length: 0
Content-Type: text/plain; charset=utf-8
Go's own http client returns a similar response object:
&{301 Moved Permanently 301 HTTP/1.1 1 1 map[Content-Type:[text/plain; charset=utf-8] Location:[/requests/] Date:[Thu, 12 Jan 2017 08:51:58 GMT] Content-Length:[0]] 0x339190 0 [] false false map[] 0xc4200cc0f0 <nil>}
Again, GET requests behave just as I'd expect them to and invoke the handler function. Do I need to do something differently to handle POST requests? Thanks for any help on this!
答案1
得分: 3
您正在查询/requests。
重定向指向/requests/。
您使用的curl命令如下：
curl localhost:8000/requests
您需要在mux.HandleFunc中使用/requests而不是/requests/。
或者使用
curl localhost:8000/requests/
还请注意，如果您的请求在浏览器上可以正常工作而无需任何更改，那是因为浏览器会自动处理重定向。
如果在mux.HandleFunc中的路由没有尾部斜杠，带有尾部斜杠的路由将返回404错误。
PS：您的requestHandler处理所有方法，而不仅仅是POST请求。您需要检查r.Method以便根据不同的方法进行处理。
英文:
You are querying for /requests.
The redirect is pointing you to /requests/
You used curl like this :
curl localhost:8000/requests
You need to either use /requests instead of /requests/ in mux.HandleFunc.
or use
curl localhost:8000/requests/
Also note that if you request would work on a browser without any change as it handles redirects automatically.
And the route with trailing slash would return 404, if the route in mux.HandleFunc does not have a trailing slash.
PS : Your requestHandler handles all methods, not just POST requests. You need to check for r.Method to handle the methods differently.
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