新接触这个工具，有个上传下载文件的需求，和以前的帖子 【
https://forum.openresty.us/d/1699-6263d824b67a7d8e42e9c4b3def3263b 上传图片的功能，需要将图片传到redis中（其实是ssdb）】有点类似
参考这个使用的lua-resty-upload，可以获取到内容了
现在想把图片做个处理再发到真正的服务器上【和nginx upstream类似】，各位大佬，这个该怎么处理？
-- https://blog.csdn.net/u013412772/article/details/78626402
--从环境变量LUA_PATH中搜索lua文件
package.path = '../lualib/resty/?.lua;'
--从LUA_CPATH中搜索C文件
package.cpath = '../lualib/?.so;'
local function get_filename(res)
local filename = ngx.re.match(res,'(.+)filename="(.+)"(.*)')
if filename then
return filename[2]
end
end
local function upload()
local upload = require("upload")
local chunk_size = 4096
local form, err = upload:new(nil,chunk_size,chunk_size)
if not form then
ngx.log(ngx.ERR, "failed to new upload: ", err)
ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)
end
local file
local filelen=0
local filename
local i=0
form:set_timeout(0)
while true do
local typ, res, err = form:read()
if not typ then
ngx.say("failed to read: ", err)
return
end
if typ == "header" then
if res[1] ~= "Content-Type" then
filename = get_filename(res[2])
ngx.log(ngx.DEBUG, "filename: " .. filename)
if filename then
i=i+1
file = io.open(filename,"w+")
if not file then
ngx.say("failed to open file ")
return
end
else
end
end
elseif typ == "body" then
if file then
filelen= filelen + tonumber(string.len(res))
file:write(res)
else
end
elseif typ == "part_end" then
if file then
file:close()
file = nil
ngx.log(ngx.DEBUG, "part_end done")
--调用agent的bat脚本,并用agent的返回值代替下面say的内容
--local result = io.popen('test.bat')
--local returnValue = result:read("*all")
--ngx.say(returnValue)
end
elseif typ == "eof" then
break
else
end
end
if i==0 then
ngx.say("please upload at least one file!")
return
end
ngx.log(ngx.DEBUG, "up done: ")
end
--开始调用上传文件脚本
ngx.log(ngx.DEBUG, "-------------start execute upload_package lua script--------------")
local request_method = ngx.var.request_method
if "POST" == request_method then
upload()
end
ngx.log(ngx.DEBUG, "-------------end execute upload_package lua script--------------")
比如拿到这个文件内容，加些水印之类，通过lua直接上传到真正的服务器上呢？
多谢！！！
