使用 Nginx Upload Module 实现上传文件功能

转载自: http://www.tuicool.com/wx/aUrAzm

 

普通网站在实现文件上传功能的时候,一般是使用Python,Java等后端程序实现,比较麻烦。Nginx有一个Upload模块,可以非常简单的实现文件上传功能。此模块的原理是先把用户上传的文件保存到临时文件,然后在交由后台页面处理,并且把文件的原名,上传后的名称,文件类型,文件大小set到页面。下面和大家具体介绍一下。

一、编译安装Nginx

为了使用Nginx Upload Module,需要编译安装Nginx,将upload module编译进去。upload module的代码可以去Github上下载: Upload Module

之后的编译安装Nginx这里就不介绍,不了解的可以参考: Ubuntu 14.10下源码编译安装Nginx 1.8.0

二、Nginx配置

Nginx upload module的简单配置如下:

server {

    listen *:80 default_server;

    server_name 192.168.1.251;

    client_max_body_size 20m;

    client_body_buffer_size 512k;

    proxy_set_header Host $host;

    proxy_set_header X-Real-IP $remote_addr;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_set_header REMOTE_ADD $remote_addr;

    location /upload {

# 转到后台处理URL,表示Nginx接收完上传的文件后,然后交给后端处理的地址

upload_pass @python;

# 临时保存路径, 可以使用散列

# 上传模块接收到的文件临时存放的路径, 1 表示方式,该方式是需要在/tmp/nginx_upload下创建以0到9为目录名称的目录,上传时候会进行一个散列处理。

upload_store /tmp/nginx_upload;

# 上传文件的权限,rw表示读写 r只读

upload_store_access user:rw group:rw all:rw;

set $upload_field_name "file";

# upload_resumable on;

# 这里写入http报头,pass到后台页面后能获取这里set的报头字段

upload_set_form_field "${upload_field_name}_name" $upload_file_name;

upload_set_form_field "${upload_field_name}_content_type" $upload_content_type;

upload_set_form_field "${upload_field_name}_path" $upload_tmp_path;

# Upload模块自动生成的一些信息,如文件大小与文件md5值

upload_aggregate_form_field "${upload_field_name}_md5" $upload_file_md5;

upload_aggregate_form_field "${upload_field_name}_size" $upload_file_size;

# 允许的字段,允许全部可以 "^.*$"

upload_pass_form_field "^.*$";

# upload_pass_form_field "^submit$|^description$";

# 每秒字节速度控制,0表示不受控制,默认0, 128K

upload_limit_rate 0;

# 如果pass页面是以下状态码,就删除此次上传的临时文件

upload_cleanup 400 404 499 500-505;

# 打开开关,意思就是把前端脚本请求的参数会传给后端的脚本语言,比如:http://192.168.1.251:9000/upload/?k=23,后台可以通过POST['k']来访问。

upload_pass_args on;  

    }

    location @python {

proxy_pass http://localhost:9999;

# return 200;  # 如果不需要后端程序处理,直接返回200即可

    }

}

三、后端处理程序

这里我们使用Django作为后端处理程序,比较简单,具体如下:

首先创建Django项目:

django-admin.py startproject uploadmodule

然后,创建views.py文件,代码如下:

# -*- coding: utf-8 -*-

import os

import json

from django.http import HttpResponse

from django.views.decorators.csrf import csrf_exempt

UPLOAD_FILE_PATH = '/tmp/nginx_upload/'

@csrf_exempt

def upload(request):

request_params = request.POST

file_name = request_params['file_name']

file_content_type = request_params['file_content_type']

file_md5 = request_params['file_md5']

file_path = request_params['file_path']

file_size = request_params['file_size']

ip_address = request.META.get('HTTP_X_REAL_IP') or request.META.get('HTTP_REMOTE_ADD')

# save file to tmp

new_file_name = '%s_%s' % (file_md5, ip_address)

new_file_path = ''.join([UPLOAD_FILE_PATH, new_file_name, os.path.splitext(file_name)[-1]])

with open(new_file_path, 'a') as new_file:

with open(file_path, 'rb') as f:

new_file.write(f.read())

content = json.dumps({

'name': file_name,

'content_type': file_content_type,

'md5': file_md5,

'path': file_path,

'size': file_size,

'ip': ip_address,

})

response = HttpResponse(content, content_type='application/json; charset=utf-8')

return response

四、示例

上面的代码完成之后,我们通过下面的命令启动Django后端程序:

cd uploadmodule/

python manage.py runserver 0.0.0.0:9999

然后,模拟POST请求:http://192.168.1.251/upload/,上传一个jpg文件,返回结果如下:

{

"name": "6125444419718417450.jpg",

"ip": "192.168.1.121",

"content_type": "image/jpeg",

"path": "/tmp/nginx_upload/0000000002",

"md5": "c3b1bd2e72694a8d5fc4548b9ecd9e18",

"size": "37980"

}

参考:

Ubuntu 14.10下源码编译安装Nginx 1.8.0

HttpUploadModule - Nginx Community

vkholodkov/nginx-upload-module at 2.2

 

Uploading to nginx using the nginx upload module with php_handler

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