fix upload file extract issue, add more test (#17)

* fix upload file extract issue, add more test

* uncomment test

test/test_magick.lua

@@ -1,7 +1,3 @@
---local str = "form-data; name=\"files[]\"; filename=\"Song-of-joy.png\""
---local ext = ngx.re.match(str, [[filename=".*\.(\w+)"]], "jo")
---print(ext)
-
 local magick = "/usr/local/ImageMagick/bin/magick"
 local tmp = io.open(magick,"r")
 if tmp == nil then
@@ -11,7 +7,7 @@ else
     io.close(tmp)
 end
 print(magick)
---
+
 --local origin = {
 --    "/Users/moicen/Music/alchemy/Song-of-joy.png",
 --    "/Users/moicen/Music/alchemy/You-and-me.png"
@@ -21,5 +17,4 @@ print(magick)
 --local file = io.popen("/usr/local/bin/magick convert -append " .. origin .. " /tmp/combined.jpeg" )
 --local output = file:read("*all")
 --file:close()
---ngx.say(output)
-
+--ngx.say(output)

test/test_re.lua

@@ -0,0 +1,10 @@
+--local str = "form-data; name=\"files[]\"; filename=\"Song-of-joy.png\""
+--local ext = ngx.re.match(str, [[filename=".*\.(\w+)"]], "jo")
+--print(ext)
+
+local str = [[image\/png]]
+local ext = ngx.re.match(str, [[image\/(\w+)]])
+print(ext)
+
+
+