英文:
Serving index file when route not found under Negroni
问题
我正在使用Golang、Negroni和Gorilla mux构建一个Web API服务器。我的API路由位于/api下，我使用Negroni来从/public目录下的URL中提供静态文件。我希望不仅在请求名称或作为索引文件时提供index.html文件（包含单页JavaScript应用程序），而且在请求否则会导致404错误的情况下也提供该文件，因为它不对应于路由或/public目录中的文件。这样，这些URL将加载Web应用程序，该应用程序将转到正确的路由（客户端JavaScript历史记录/推送状态），否则如果资源不存在，则会显示未找到错误。是否有办法让Negroni的静态中间件或Gorilla mux实现这一点？
英文:
I am using Golang, Negroni, and Gorilla mux for a web api server. I have my api routes under /api and I am using Negroni to serve static files from my /public directory using urls under /. I would like to serve my index.html file (containing a single page javascript application) not only if it is requested by name or as the index file, but also if the request would otherwise result in a 404 because it doesn't correspond to a route or a file in the /public directory. This is so that those URLs will load the webapp which will transition to the correct route (client side javascript history/pushState) or else give a not found error if that resource doesn't exist. Is there a way to get Negroni's static middleware or Gorilla mux to do this?
答案1
得分: 4
在mux库中，Router类型具有一个NotFoundHandler字段，其类型为http.Handler。这将允许您根据需要处理未匹配的路由：
// NotFoundHandler覆盖默认的未找到处理程序
func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
// 您可以使用serve file助手来响应404请求
http.ServeFile(w, r, "public/index.html")
}
func main() {
r := mux.NewRouter()
r.NotFoundHandler = http.HandlerFunc(NotFoundHandler)
// 注册其他路由或设置negroni
log.Fatal(http.ListenAndServe(":8080", r))
}
以上是代码的翻译部分。
英文:
The Router type in the mux library has a NotFoundHandler field of type http.Handler. This would allow you to handle a unmatched route as you see fit:
// NotFoundHandler overrides the default not found handler
func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
// You can use the serve file helper to respond to 404 with
// your request file.
http.ServeFile(w, r, "public/index.html")
}
func main() {
r := mux.NewRouter()
r.NotFoundHandler = http.HandlerFunc(NotFoundHandler)
// Register other routes or setup negroni
log.Fatal(http.ListenAndServe(":8080", r))
}
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