resty_functions/prod/upload/upload.lua

-- local resty_sha1 = require "resty.sha1"
local upload = require "resty.upload"
-- opm get thibaultcha/lua-resty-jit-uuid
local uuid      = require "resty.jit-uuid"
local cjson     = require "cjson"

local chunk_size = 4096
local form = upload:new(chunk_size)
-- local sha1 = resty_sha1:new()
uuid.seed()
ngx.say("...FILE UPLOAD...")

local file
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
        -- local file_name = my_get_file_name(res)
        local file_name = string.format("/tmp/%s.jpeg", uuid())
        ngx.say("...CREATE FILE....")
        if file_name then
            file = io.open(file_name, "w+")
            if not file then
                ngx.say("failed to open file ", file_name)
                return
            end
        end

     elseif typ == "body" then
        if file then
            ngx.say("...WRITE DATA...")
            file:write(res)
            -- sha1:update(res)
        end

    elseif typ == "part_end" then
        ngx.say("...FINSIHED WRITTING FILE...")
        file:close()
        file = nil
        -- local sha1_sum = sha1:final()
        -- sha1:reset()
        -- my_save_sha1_sum(sha1_sum)

    elseif typ == "eof" then
        -- todo weli : create task -> task_server -> generate_task()
        ngx.say("...NO MORE FILE...")
        break
    else
        -- do nothing
    end
end