* Lua code functioning.

lua/cache_warmer_client.lua

@@ -28,18 +28,21 @@
 -- FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 -- DEALINGS IN THE SOFTWARE.
 
+-- This Lua code is part of the cache_warmer.
+
 -- The http component of the socket library.
-local http = require(socket.http)
+local http = require('socket.http')
 
 -- Make the request to the given URIs.
 function cache_warmer_make_request(uri)
    -- Make the request and get the results.
    local response, status, headers = http.request {
       url = uri,
       method = 'HEAD',
+      -- Use a different User-Agent.
+      headers = { ['user-agent'] = 'Nginx Cache Warmer' },
       redirect = true -- follow redirects
                                                   }
-
    return response, status, headers
 end -- cache_warmer_make_request
 

lua/cache_warmer_requests.lua

@@ -1,4 +1,32 @@
--- Perform the location multi capture to issue the requests in parallel.
+-- cache_warmer_requests.lua --- Performs the location multi capture
+--                               to issue the requests in parallel.
+
+-- Copyright (C) 2012 António P. P. Almeida <appa@perusio.net>
+
+-- Author: António P. P. Almeida <appa@perusio.net>
+
+-- Permission is hereby granted, free of charge, to any person obtaining a
+-- copy of this software and associated documentation files (the "Software"),
+-- to deal in the Software without restriction, including without limitation
+-- the rights to use, copy, modify, merge, publish, distribute, sublicense,
+-- and/or sell copies of the Software, and to permit persons to whom the
+-- Software is furnished to do so, subject to the following conditions:
+
+-- The above copyright notice and this permission notice shall be included in
+-- all copies or substantial portions of the Software.
+
+-- Except as contained in this notice, the name(s) of the above copyright
+-- holders shall not be used in advertising or otherwise to promote the sale,
+-- use or other dealings in this Software without prior written authorization.
+
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+-- THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+-- FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+-- DEALINGS IN THE SOFTWARE.
+
 -- This Lua code is part of the cache_warmer.
 
 -- First we grab the POST data.
@@ -11,21 +39,21 @@ post_data['base_uri'] = nil
 
 local requests = {} -- requests table
 
--- Building the location for making the parallel requests.
+-- -- Building the location for making the parallel requests.
 function build_req_uri(base_uri, uri)
    return string.format('/parallel-reqs?u=%s/%s', base_uri, uri)
 end -- build_req_uri
 
 -- Loop over the post_data table (contains the URIs to be hit).
-for i, u in pairs(post_data) do
+for _, u in pairs(post_data) do
    -- All requests are HEAD requests.
-   table.insert(requests, { build_req_uri(base_uri, u), { method = ngx.HTTP_HEAD }})
+   table.insert(requests, { build_req_uri(base_uri, u),{ method = ngx.HTTP_HEAD }})
 end
 
--- Issue the requests and store the responses.
-local responses = ngx.location_multi(requests)
+-- Issue the requests and store the responses in a table.
+local responses = { ngx.location.capture_multi(requests) }
 
 -- Process the responses.
-for i, r in pairs(responses) do
-   ngx.say(i, r)
+for _, r in pairs(responses) do
+   ngx.say(r.status) -- get the status only (HEAD)
 end