Nginx+Nodejs搭建图片服务器

Nginx+Nodejs搭建图片服务器

　　图片上传请求由Node处理，图片访问请求由Nginx处理。

1、Nginx配置

#user  nobody;worker_processes  1;#error_log  logs/error.log;#error_log  logs/error.log  notice;#error_log  logs/error.log  info;#pid        logs/nginx.pid;events {    worker_connections  1024;}http {    include       mime.types;    default_type  application/octet-stream;    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '    #                  '$status $body_bytes_sent "$http_referer" '    #                  '"$http_user_agent" "$http_x_forwarded_for"';    #access_log  logs/access.log  main;    sendfile        on;    tcp_nopush     on;    sendfile_max_chunk 256K;    #keepalive_timeout  0;    keepalive_timeout  65;    #gzip  on;        upstream localhost {        server localhost:3000;#node服务器    }    server {        listen       80;        server_name  localhost;                        #开启索引功能        autoindex    on;                #关闭计算文件确切大小        autoindex_exact_size off;        #charset koi8-r;        #access_log  logs/host.access.log  main;        #上传操作由node服务器处理        location / {            proxy_pass    http://localhost;            index    index.html;        }                #映射图片访问url        location /image/ {            expires 30d;#缓存时间            root    E:/Study/nginx/nginx-1.7.6/files;        }        #error_page  404              /404.html;        # redirect server error pages to the static page /50x.html        #        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }        # proxy the php scripts to Apache listening on 127.0.0.1:80        #        #location ~ /.php$ {        #    proxy_pass   http://127.0.0.1;        #}        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000        #        #location ~ /.php$ {        #    root           html;        #    fastcgi_pass   127.0.0.1:9000;        #    fastcgi_index  index.php;        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;        #    include        fastcgi_params;        #}        # deny access to .htaccess files, if Apache's document root        # concurs with nginx's one        #        #location ~ //.ht {        #    deny  all;        #}    }    # another virtual host using mix of IP-, name-, and port-based configuration    #    #server {    #    listen       8000;    #    listen       somename:8080;    #    server_name  somename  alias  another.alias;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}    # HTTPS server    #    #server {    #    listen       443 ssl;    #    server_name  localhost;    #    ssl_certificate      cert.pem;    #    ssl_certificate_key  cert.key;    #    ssl_session_cache    shared:SSL:1m;    #    ssl_session_timeout  5m;    #    ssl_ciphers  HIGH:!aNULL:!md5;    #    ssl_prefer_server_ciphers  on;    #    location / {    #        root   html;    #        index  index.html index.htm;    #    }    #}}

2、nodejs项目架构

　　1）项目结构图

　　2）bin/www 是启动脚本

#!/usr/bin/env nodevar debug = require('debug')('file-server');var app = require('../app');app.set('port', process.env.PORT || 3000);var server = app.listen(app.get('port'), function() {  console.log('Express server listening on port ' + server.address().port);  debug('Express server listening on port ' + server.address().port);});

　　3）config/setting.json 是程序中用的一些常量以json格式配置

{    "image_url":"http://localhost/image",    "image_dir":"E:/Study/nginx/nginx-1.7.6/files/image",    "tmp_dir":"E:/Study/nginx/nginx-1.7.6/tmp"}

　　4）controller/file-ctrl.js 是文件上传的处理代码

var fs = require('fs');var path = require('path');var    formidable = require('formidable');var util = require('util');var fs = require('fs');var path = require('path');var setting = require('../config/setting.json');/** * 上传 */exports.upload = function(req,res){    var form = new formidable.IncomingForm();    form.encoding = 'utf-8';    //如果需要临时文件保持原始文件扩展名，设置为true    form.keepExtensions = false;    //文件大小限制，默认2MB    form.maxFieldsSize = 2 * 1024 * 1024;    //图片存放目录    var imageDir = setting.image_dir;    //上传临时目录    var tmpDir = setting.tmp_dir;    form.uploadDir = tmpDir;//目录需要已存在    /**     * fields 表单中的其他属性     * files  文件集合     */    form.parse(req, function(err, fields, files) {        //图片完整路径        var imagePath = path.resolve(imageDir, files.file.name);        //将临时目录中的图片移动到图片存放目录下        fs.rename(files.file.path,imagePath,function(err){            if(err) {                res.json({'success':false,'msg':err});            }else{                var image_url = setting.image_url+'/'+files.file.name;                res.json({'success':true,'msg':'上传成功！','image_url':image_url});                //res.json({'success':true,'msg':'上传成功！','image_url':image_url,'fields':util.inspect({fields: fields, files: files})});            }        });    });}/** * 下载 */exports.download = function(req,res){    var filename = req.params.filename;    var dir = setting.file_dir;    var file_path = path.resolve(dir,filename);    fs.exists(file_path,function(exists) {        if(!exists) {            res.json({'success':false,'msg':'文件不存在！'});        }else{            res.download(file_path,function(err){                if(err) {                    res.json({'success':false,'msg':err});                }            });                    }    });    }

　　5）routes/route.js 是整个项目的路由控制

var express = require('express');var router = express.Router();var file_ctrl = require('../controller/file-ctrl')/**上传文件*/router.post('/upload',file_ctrl.upload);module.exports = router;

　　6）app.js 是项目的全局配置

var express = require('express');var path = require('path');var favicon = require('static-favicon');var logger = require('morgan');var cookieParser = require('cookie-parser');var bodyParser = require('body-parser');var routes = require('./routes/route');var app = express();// view engine setupapp.set('views', path.join(__dirname, 'views'));app.set('view engine', 'jade');app.use(favicon());app.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded());app.use(cookieParser());app.use(express.static(path.join(__dirname, 'public')));app.use('/', routes);/// catch 404 and forward to error handlerapp.use(function(req, res, next) {    var err = new Error('Not Found');    err.status = 404;    next(err);});/// error handlers// development error handler// will print stacktraceif (app.get('env') === 'development') {    app.use(function(err, req, res, next) {        res.status(err.status || 500);        res.render('error', {            message: err.message,            error: err        });    });}// production error handler// no stacktraces leaked to userapp.use(function(err, req, res, next) {    res.status(err.status || 500);    res.render('error', {        message: err.message,        error: {}    });});module.exports = app;

　　6）package.json　　是依赖包管理

{  "name": "file-server",  "version": "0.0.1",  "private": true,  "scripts": {    "start": "node ./bin/www"  },  "dependencies": {    "express": "~4.2.0",    "static-favicon": "~1.0.0",    "morgan": "~1.0.0",    "cookie-parser": "~1.0.1",    "body-parser": "~1.0.0",    "debug": "~0.7.4",    "jade": "~1.3.0",    "formidable":"*"  }}

　　项目用到了expressjs框架。

3、简单写一个html上传页面

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>        <title>upload</title>    <meta http-equiv="pragma" content="no-cache">    <meta http-equiv