Adds extra optional argument headers (#9)

* feat: adds headers argument

* docs: adds examples with headers

* refact: using :edn instead of a [:string]

* chore: fix docs

.clj-kondo/babashka/fs/config.edn

@@ -0,0 +1 @@
+{:lint-as {babashka.fs/with-temp-dir clojure.core/let}}

.clj-kondo/http-kit/http-kit/config.edn

@@ -0,0 +1,3 @@
+
+{:hooks
+ {:analyze-call {org.httpkit.server/with-channel httpkit.with-channel/with-channel}}}

.clj-kondo/http-kit/http-kit/httpkit/with_channel.clj

@@ -0,0 +1,16 @@
+(ns httpkit.with-channel
+  (:require [clj-kondo.hooks-api :as api]))
+
+(defn with-channel [{node :node}]
+  (let [[request channel & body] (rest (:children node))]
+    (when-not (and request     channel) (throw (ex-info "No request or channel provided" {})))
+    (when-not (api/token-node? channel) (throw (ex-info "Missing channel argument" {})))
+    (let [new-node
+          (api/list-node
+            (list*
+              (api/token-node 'let)
+              (api/vector-node [channel (api/vector-node [])])
+              request
+              body))]
+
+      {:node new-node})))

.clj-kondo/rewrite-clj/rewrite-clj/config.edn

@@ -0,0 +1,5 @@
+{:lint-as
+ {rewrite-clj.zip/subedit-> clojure.core/->
+  rewrite-clj.zip/subedit->> clojure.core/->>
+  rewrite-clj.zip/edit-> clojure.core/->
+  rewrite-clj.zip/edit->> clojure.core/->>}}

README.md

@@ -21,13 +21,13 @@ To your `deps.edn` add an alias:
 Then run from the command line:
 
 ``` clojure
-clj -M:serve :port 1339 :dir "."
+clj -M:serve :port 1339 :dir "." :headers '{"Cross-Origin-Opener-Policy" "same-origin"}'
 ```
 
 or:
 
 ``` clojure
-clj -X:serve :port 1339 :dir '"."'
+clj -X:serve :port 1339 :dir '"."' :headers '{"Cross-Origin-Opener-Policy" "same-origin"}'
 ```
 
 Or install as a tool:
@@ -56,7 +56,7 @@ In a script, e.g. `/usr/local/bin/http-server`:
 Then invoke using:
 
 ``` clojure
-$ http-server --port 8888 --dir resources/public
+$ http-server --port 8888 --dir resources/public --headers '{"Cross-Origin-Opener-Policy" "same-origin"}'
 ```
 
 In `bb.edn` [tasks](https://book.babashka.org/#tasks):
@@ -66,7 +66,7 @@ In `bb.edn` [tasks](https://book.babashka.org/#tasks):
         org.babashka/cli {:mvn/version "0.2.23"}}
  :tasks
  {:requires ([babashka.cli :as cli])
-  :init (def cli-opts (cli/parse-opts *command-line-args* {:coerce {:port :int}}))
+  :init (def cli-opts (cli/parse-opts *command-line-args* {:coerce {:port :int :headers :edn}}))
 
   serve {:doc "Serve static assets"
          :requires ([babashka.http-server :as server])

src/babashka/http_server.clj

@@ -11,11 +11,11 @@
   (:import [java.net URLDecoder URLEncoder]))
 
 #_(def ^:private
-  cli-options [["-p" "--port PORT" "Port for HTTP server"
-                :default 8090 :parse-fn #(Integer/parseInt %)]
-               ["-d" "--dir DIR" "Directory to serve files from"
-                :default "."]
-               ["-h" "--help" "Print usage info"]])
+    cli-options [["-p" "--port PORT" "Port for HTTP server"
+                  :default 8090 :parse-fn #(Integer/parseInt %)]
+                 ["-d" "--dir DIR" "Directory to serve files from"
+                  :default "."]
+                 ["-h" "--help" "Print usage info"]])
 
 ;; A simple mime type utility from https://github.com/ring-clojure/ring/blob/master/ring-core/src/ring/util/mime_type.clj
 (def ^{:doc "A map of file extensions to mime-types."}
@@ -149,23 +149,26 @@
                html/html
                str)}))
 
-(defn- body [path]
-  {:headers {"Content-Type" (ext-mime-type (fs/file-name path))}
-   :body (fs/file path)})
+(defn- body
+  ([path]
+   (body path {}))
+  ([path headers]
+   {:headers (merge {"Content-Type" (ext-mime-type (fs/file-name path))} headers)
+    :body (fs/file path)}))
 
-(defn file-router [dir]
+(defn file-router [dir headers]
   (fn [{:keys [uri]}]
     (let [f (fs/path dir (str/replace-first (URLDecoder/decode uri) #"^/" ""))
           index-file (fs/path f "index.html")]
       (cond
         (and (fs/directory? f) (fs/readable? index-file))
-        (body index-file)
+        (body index-file headers)
 
         (fs/directory? f)
         (index dir f)
 
         (fs/readable? f)
-        (body f)
+        (body f headers)
 
         :else
         {:status 404 :body (str "Not found `" f "` in " dir)}))))
@@ -174,20 +177,20 @@
   "Serves static assets using web server.
 Options:
   * `:dir` - directory from which to serve assets
-  * `:port` - port"
+  * `:port` - port
+  * `:headers` - map of headers {key value}"
   [{:keys [port]
     :or {port 8090}
     :as opts}]
   (let [dir (or (:dir opts) ".")
-        opts (assoc opts :dir dir)
-        opts (assoc opts :port port)
+        opts (assoc opts :dir dir :port port)
         dir (fs/path dir)]
     (assert (fs/directory? dir) (str "The given dir `" dir "` is not a directory."))
     (binding [*out* *err*]
       (println (str "Serving assets at http://localhost:" (:port opts))))
-    (server/run-server (file-router dir) opts)))
+    (server/run-server (file-router dir (opts :headers)) opts)))
 
-(def ^:private cli-opts {:coerce {:port :long}})
+(def ^:private cli-opts {:coerce {:port :long :headers :edn}})
 
 (defn exec
   "Exec function, intended for command line usage. Same API as `serve` but