OpenResty 是一个基于 Nginx 与Lua 的高性能 Web 平台，其内部集成了大量精良的 Lua 库、第三方模块以及大多数的依赖项。这里将用到 lua-resty-upload 模块来处理上传超大的文件的请求。
lua-resty-upload
lua-resty-upload 模块实现基于 rfc1867 的 http协议文件上传、要求客户端提交的表单enctype=”multipart/form-data”，method=”POST”。
前端
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<form action="upfile" method="post" enctype="multipart/form-data">
<label for="testFileName">select file: </label>
<input type="file" name="testFileName"/>
<input type="submit" name="upload" value="Upload" />
</form>
后端处理
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local upload = require "resty.upload"
local cjson = require "cjson"
local chunk_size = 4096 -- should be set to 4096 or 8192
local filename
local file = nil
function get_filename(res)
local filename = ngx.re.match(res,'(.+)filename="(.+)"(.*)')
if filename then
return filename[2]
end
end
function existsFile(path)
x = io.open(path)
if x == nil then
io.close()
return false
else
x:close()
return true
end
end
local form, err = upload:new(chunk_size)
if not form then
ngx.log(ngx.ERR, "failed to new upload: ", err)
ngx.exit(500)
end
form:set_timeout(1000) -- 1 sec
local osfilepath = "/tmp/"
local i=0
while true do
local typ, res, err = form:read()
if not typ then
ngx.say("failed to read: ", err)
return
end
ngx.say("read: ", cjson.encode({typ, res}))
if typ == "header" then
if res[1] ~= "Content-Type" then
filename = get_filename(res[2])
if filename then
i=i+1
filepath = osfilepath .. filename
file = io.open(filepath,"w+")
if not file then
ngx.say("failed to open file: ", filepath)
return
end
end
end
elseif typ == "body" then
ngx.say("body begin")
if file then
file:write(res)
ngx.say("write ok: ", res)
end
elseif typ == "part_end" then
ngx.say("part_end")
if file then
file:close()
file = nil
ngx.say("file upload success")
end
elseif typ == "eof" then
break
end
end
local typ, res, err = form:read()
ngx.say("read: ", cjson.encode({typ, res}))
if i==0 then
ngx.say("please upload at least one file!")
return
end
python 测试代码
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import requests #pip install requests if you don't have it already
url = 'http://www.test.com/lua/upload'
files = {'file':open('55e82a49e35383de7dcaa8b325da148f.jpg')}
#files = {'file':open('hello.txt')}
#'file' => name of html input field
r = requests.post(url, files=files)
#print r
#print dir(r)
print '=============== content ==================='
#print r.content
'''
print '=============== text ==================='
print r.text
print '=============== json ==================='
print r.json
print '=============== raw ==================='
print r.raw
'''
print '=============== url ==================='
print r.url
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