feat(crawler): manage `file://` protocol

.vscode/settings.json

@@ -23,6 +23,7 @@
     "mkdir",
     "setopt",
     "Stylua",
+    "tablex",
     "tmpl",
     "wibox",
     "writefunction"

src/awesomewm.d.tl/crawler/init.lua

@@ -1,10 +1,12 @@
+local file = require "pl.file"
 local http = require "socket.http"
 local inspect = require "inspect"
 local log = require "logger"
+local tablex = require "pl.tablex"
 
 local crawler = {}
 
-function crawler.request(url)
+local function http_request(url)
    local body, code_or_error = http.request(url)
 
    if not body then
@@ -25,8 +27,26 @@ function crawler.request(url)
    return body
 end
 
+local function get_resource_by_protocol(url)
+   local protocol, resource = url:match "^(%a+)://(.*)$"
+
+   if not not tablex.find({ "http", "https" }, protocol) then
+      local success, result = pcall(http_request, url)
+      return success, result
+   elseif protocol == "file" then
+      local res, err = file.read(resource, false)
+      if res then
+         return true, res
+      else
+         return false, err
+      end
+   else
+      error { "Unsupported protocol", protocol = protocol }
+   end
+end
+
 function crawler.fetch(url)
-   local success, result = pcall(crawler.request, url)
+   local success, result = get_resource_by_protocol(url)
 
    if not success then
       log:error(inspect { "Fetch failed", status = success, error = result })