1，首先不能建立upload物件

直接報錯

failed to new upload: request body already exists

因為之前使用過一個叫 lua_need_request_body 顯示 respons的post資訊，和這個衝突了。去掉就好了。

去掉就好了。

2，將上傳日誌寫到磁碟

package.path = '/usr/local/share/lua/5.1/?.lua;/usr/local/openresty/lualib/resty/?.lua;'
package.cpath = '/usr/local/lib/lua/5.1/?.so;'

local upload = require
 
 "upload"

local chunk_size = 4096  --如果不設定預設是4096.
local form = upload:new(chunk_size)
local file
local filelen=0
form:set_timeout(0) -- 1 sec
local filename

function get_filename(res)
    local filename = ngx.re.match(res,'(.+)filename="(.+)"(.*)')
    if filename then 
        return filename[2]
    end
 

end

local osfilepath = "/usr/local/openresty/nginx/html/"
local i=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
 
])
            if filename then
                i=i+1
                filepath = osfilepath  .. filename
                file = io.open(filepath,"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.say("file upload success")
        end
    elseif typ == "eof" then
        break
    else
    end
end
if i==0 then
    ngx.say("please upload at least one file!")
    return
end

這裡需要注意一個問題，
/usr/local/openresty/nginx/html/資料夾必須是nobody許可權，否則不能寫檔案，報錯。

chown nobody:nobody /usr/local/openresty/nginx/html

上傳啥都行了，也可以是圖片，檔案。

3，總結

lua+nginx上傳速度還是非常快的。而且很輕量。