Clojure Pedestal root用作应用程序/八位字节流

Question

我试图在Pedestal 0.5.1中托管静态资产和服务.我使用::file-path指向一个目录来托管文件.如果我直接导​​航到文件http:// localhost:8888/index.html,这可以正常工作,但如果我转到站点的根目录http:// localhost:8888,它将提供文件application/octet-stream而不是text/html.我调整了Hello World Sample并且它具有相同的行为.

SRC /程序hello_world/server.clj

(ns hello-world.server
  (:require [io.pedestal.http :as http]
            [io.pedestal.http.route :as route])
  (:gen-class))

(def routes
  (route/expand-routes [[]]))

(def service
  {:env                 :prod
   ::http/join? false
   ::http/routes routes
   ::http/file-path "/tmp/www"       
   ::http/type          :jetty
   ::http/allowed-origins {:creds true :allowed-origins (constantly true)}       
   ::http/port          8888})

(defonce runnable-service (http/create-server service))

(defn -main
  "The entry-point for 'lein run'"
  [& args]
  (println "\nCreating your server...")
  (http/start runnable-service))

开始 lein run

$ curl -i localhost:8888
HTTP/1.1 200 OK
Date: Fri, 18 Nov 2016 16:02:56 GMT
Last-Modified: Fri, 18 Nov 2016 15:10:22 GMT
Content-Type: application/octet-stream
Content-Length: 12
Server: Jetty(9.3.8.v20160314)

hello world

$ curl -i localhost:8888/index.html
HTTP/1.1 200 OK
Date: Fri, 18 Nov 2016 16:03:02 GMT
Last-Modified: Fri, 18 Nov 2016 15:10:22 GMT
Content-Type: text/html
Content-Length: 12
Server: Jetty(9.3.8.v20160314)

hello world

有没有办法修复"/"路由以提供正确的内容类型？

Answer 1

要获取作为目录索引的文件的正确内容类型,请将拦截器添加io.pedestal.http.ring-middlewares/file-info到Pedestal配置中.

这要求您使用自己的默认拦截器链覆盖默认拦截器链,因此您必须包含应用程序所需的所有默认拦截器.

例如,您的服务可能如下所示:

(ns hello-world.service
  (:require
   [io.pedestal.http :as http]
   [io.pedestal.http.ring-middlewares :as middlewares]
   [io.pedestal.http.route :as route]
   [io.pedestal.http.route.definition :refer [defroutes]]))

(defroutes routes
  [[]])

(def service
  {::http/type :jetty
   ::http/port 8080
   ::http/interceptors [http/log-request
                        http/not-found
                        middlewares/session
                        route/query-params
                        (middlewares/file-info)  ; HERE
                        (middlewares/file "/tmp/www")
                        ;; ... insert other interceptors ...
                        (route/router #(deref #'routes) :map-tree)]})

有关您可能想要包含的其他默认拦截器的示例,请参阅default-interceptors.

说明

这在实践中可能不会经常出现,因为许多Web应用程序使用处理程序函数来生成主页而不是返回静态文件.

对于备用解决方案,您可以为路由编写路由处理程序,该/ 路由器返回index.html具有适当内容类型的内容.

Pedestal的默认拦截器堆栈包括 io.pedestal.http.ring-middlewares/file 和io.pedestal.http.ring-middlewares/content-type.

这些拦截器分别只包含Ring中间件函数 file- content 和content-type-response.

file-request返回一个java.io.File对象作为HTTP响应.

content-type-response检查请求URI以确定Content-Type标头的值.由于URI只是/默认值application/octet-stream.

相反ring.middleware.file-info(不推荐使用)检查File响应中实际对象的路径.请参阅file-info-response.

io.pedestal.http.ring-middlewares/file-info是拦截器包装器ring.middleware.file-info/file-info-response.