Logging and fix 403 error

swift.json

@@ -3,5 +3,6 @@
   "secret_key": "you_secret_key",
   "auth_uri": "http://radosgw/auth/1.0",
   "rados_uri": "http://radosgw/swift/v1/",
-  "bucket": "public"
+  "bucket": "public",
+  "logfile": "/var/log/nginx/swift.log"
 }

swift.lua

@@ -1,11 +1,17 @@
-local cjson = require "cjson"
+local cjson = require("cjson")
+local time = require("os")
+local ltn12 = require("ltn12")
+local io = require("io")
 
 -- Load configuration
-function readConf(file)
+function readConf()
+	local file = '/etc/nginx/etc/swift.json'
 	local f, err = io.open(file, "rb")
 	local content = f:read("*all")
 	f:close()
-	return content
+
+	local conf = cjson.decode(content)
+	return conf
 end
 
 -- Print nested tables
@@ -19,8 +25,15 @@ function content_from_table(tbl)
     end
 end
 
-local json = readConf('/etc/nginx/etc/swift.json')
-local conf = cjson.decode(json)
+-- Write to log
+function write_to_logfile(string)
+	local conf = readConf('/etc/nginx/etc/swift.json')
+	local l, err = io.open(conf.logfile, "a")
+	l:write(string .. "\n")
+	l:close()
+end
+
+local conf = readConf()
 
 -- Make authentication request to Ceph
 headers_t = {}
@@ -35,7 +48,8 @@ local r, c, h = http.request{
 }
 
 -- Return 403 if not authorized 
-if c ~= 200 then
+if c ~= 204 then
+    write_to_logfile(time.date() .. ' 403')
     ngx.exit(ngx.HTTP_FORBIDDEN)
 end
 
@@ -46,8 +60,8 @@ auth_token = h["x-auth-token"]
 content_headers= {}
 content_headers["X-Auth-Token"] = auth_token
 
-local ltn12 = require("ltn12")
-local io = require("io")
+write_to_logfile(time.date() .. " Auth OK. Token is: " .. auth_token)
+
 
 t = {}
 
@@ -58,8 +72,11 @@ local resp, code, http_st = http.request{
 	sink 	= ltn12.sink.table(t)
 }
 
+write_to_logfile(time.date() .. " URI: " .. conf.rados_uri .. conf.bucket .. ngx.var.path)
+
 -- Return 404 if object not found in Ceph
 if code ~= 200 then
+	write_to_logfile(time.date() .. " Not found")
 	ngx.exit(ngx.HTTP_NOT_FOUND)
 end