Openresty配置文件上传下载

1. 下载包安装Openresty

openresty-1.13.6.1下载地址 https://openresty.org/download/openresty-1.13.6.1.tar.gz

安装请自行百度。

2. 配置

2.1 nginx.conf

user root;
worker_processes  20;

error_log  logs/error.log notice;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    server {
        listen       8082;
        server_name  localhost;
        # 最大允许上传的文件大小
        client_max_body_size 200m;        

        location / {
            root   html;
            index  index.html index.htm;
        }
        set $store_dir "/sdf/slb/openresty/nginx/html/download/"; # 文件存储路径
        # 文件上传接口：http://xxx:8082/upfile
        location /upfile {
            content_by_lua_file conf/lua/upload.lua; # 实现文件上传的逻辑
        }
        # 文件下载入口: http://xxx:8082/download
        location /download {
            autoindex on;
            autoindex_localtime on;
            root   html;
            index  index.html;
        }
        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

　　

2.2 upload.lua（文件位于conf/lua/upload.lua）

-- upload.lua
--==========================================
-- 文件上传
--==========================================
local upload = require "resty.upload"
local cjson = require "cjson"
local chunk_size = 4096
local form, err = upload:new(chunk_size)
if not form then
    ngx.log(ngx.ERR, "failed to new upload: ", err)
    ngx.exit(ngx.HTTP_INTERNAL_SERVER_ERROR)
end
form:set_timeout(1000)
-- 字符串 split 分割
string.split = function(s, p)
    local rt= {}
    string.gsub(s, '[^'..p..']+', function(w) table.insert(rt, w) end )
    return rt
end
-- 支持字符串前后 trim
string.trim = function(s)
    return (s:gsub("^%s*(.-)%s*$", "%1"))
end
-- 文件保存的根路径
local saveRootPath = ngx.var.store_dir
-- 保存的文件对象
local fileToSave
--文件是否成功保存
local ret_save = false
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
        -- 开始读取 http header
        -- 解析出本次上传的文件名
        local key = res[1]
        local value = res[2]
        if key == "Content-Disposition" then
            -- 解析出本次上传的文件名
            -- form-data; name="testFileName"; filename="testfile.txt"
            local kvlist = string.split(value, ';')
            for _, kv in ipairs(kvlist) do
                local seg = string.trim(kv)
                if seg:find("filename") then
                    local kvfile = string.split(seg, "=")
                    local filename = string.sub(kvfile[2], 2, -2)
                    if filename then
                        fileToSave = io.open(saveRootPath .. filename, "w+")
                        if not fileToSave then
                            ngx.say("failed to open file ", filename)
                            return
                        end
                        break
                    end
                end
            end
        end
    elseif typ == "body" then
        -- 开始读取 http body
        if fileToSave then
            fileToSave:write(res)
        end
    elseif typ == "part_end" then
        -- 文件写结束，关闭文件
        if fileToSave then
            fileToSave:close()
            fileToSave = nil
        end

        ret_save = true
    elseif typ == "eof" then
        -- 文件读取结束
        break
    else
        ngx.log(ngx.INFO, "do other things")
    end
end
if ret_save then
    ngx.say("save file ok")
end

　　

3. 测试

3.1 启动openresty

sbin/nginx

3.2 上传文件

通过地址http://192.168.23.65:8082/upfile上传文件。

3.3 下载文件

通过http://192.168.23.65:8082/download下载文件。

x. 参考资料

http://www.codexiu.cn/nginx/blog/11024/