基于Node.js的简单文件服务器

by

at 2010-11-28 20:21:18

original http://www.javaeye.com/topic/827328

最近看了下Node.js，基于V8的服务端javascript，有点意思，就写了个简单的文件夹系统，用于列出系统的某个文件夹下的文件，并可以实现下载。不过对于比较大的文件，可能会有点问题。。Node.js一般在linux下运行，附件是基于cygwin的版本，可以测试下，运行方式为node filesystem.js。javaeye的文件上传很让人无奈，太慢，只好放在其他地方了。http://files.cnblogs.com/flyingzl/node.js.7z

贴下代码：

/**
 * @author flyingzl
 * @date 2010-11-27
 * 一个基于Node.js的简单文件服务器
 /

var fs=require("fs"),
    http=require("http"),
    url=require("url"),
    path=require("path"),
    mime=require("./mime").mime,
    util=require('util');

//www根目录
var root=__dirname,
    host="127.0.0.1",
    port="8888";

if(!path.existsSync(root)){
    util.error(root+"文件夹不存在，请重新制定根文件夹！");
    process.exit();
}

//显示文件夹下面的文件
function listDirectory(parentDirectory,req,res){
    fs.readdir(parentDirectory,function(error,files){
        var body=formatBody(parentDirectory,files);
        res.writeHead(200,{
            "Content-Type":"text/html;charset=utf-8",
            "Content-Length":Buffer.byteLength(body,'utf8'),
            "Server":"NodeJs("+process.version+")"
        });
        res.write(body,'utf8');
        res.end();
    });

}

//显示文件内容
function showFile(file,req,res){
    fs.readFile(filename,'binary',function(err,file){
        var contentType=mime.lookupExtension(path.extname(filename));
        res.writeHead(200,{
            "Content-Type":contentType,
            "Content-Length":Buffer.byteLength(file,'binary'),
            "Server":"NodeJs("+process.version+")"
        });
        res.write(file,"binary");
        res.end();
    })
}

//在Web页面上显示文件列表，格式为<ul><li></li><li></li></ul>
function formatBody(parent,files){
    var res=[],
        length=files.length;
    res.push("<!doctype>");
    res.push("<html>");
    res.push("<head>");
    res.push("<meta http-equiv='Content-Type' content='text/html;charset=utf-8'></meta>")
    res.push("<title>Node.js文件服务器</title>");
    res.push("</head>");
    res.push("<body width='100%'>");
    res.push("<ul>")
    files.forEach(function(val,index){
        var stat=fs.statSync(path.join(parent,val));
        if(stat.isDirectory(val)){
            val=path.basename(val)+"/";
        }else{
            val=path.basename(val);
        }
        res.push("<li><a href='"+val+"'>"+val+"</a></li>");
    });
    res.push("</ul>");
    res.push("<div style='position:relative;width:98%;bottom:5px;height:25px;background:gray'>");
    res.push("<div style='margin:0 auto;height:100%;line-height:25px;text-align:center'>Powered By Node.js</div>");
    res.push("</div>")
    res.push("</body>");
    return res.join("");
}

//如果文件找不到，显示404错误
function write404(req,res){
    var body="文件不存在:-(";
    res.writeHead(404,{
        "Content-Type":"text/html;charset=utf-8",
        "Content-Length":Buffer.byteLength(body,'utf8'),
        "Server":"NodeJs("+process.version+")"
    });
    res.write(body);
    res.end();
}

//创建服务器
http.createServer(function(req,res){
    //将url地址的中的%20替换为空格，不然Node.js找不到文件
    var pathname=url.parse(req.url).pathname.replace(/%20/g,' '),
        re=/(%[0-9A-Fa-f]{2}){3}/g;
    //能够正确显示中文，将三字节的字符转换为utf-8编码
    pathname=pathname.replace(re,function(word){
        var buffer=new Buffer(3),
            array=word.split('%');
        array.splice(0,1);
        array.forEach(function(val,index){
            buffer[index]=parseInt('0x'+val,16);
        });
        return buffer.toString('utf8');
    });
    if(pathname=='/'){
        listDirectory(root,req,res);
    }else{
        filename=path.join(root,pathname);
        path.exists(filename,function(exists){
            if(!exists){
                util.error('找不到文件'+filename);
                write404(req,res);
            }else{
                fs.stat(filename,function(err,stat){
                    if(stat.isFile()){
                        showFile(filename,req,res);
                    }else if(stat.isDirectory()){
                        listDirectory(filename,req,res);
                    }
                });
            }
        });
    }

}).listen(port,host);

util.debug("服务器开始运行 http://"+host+":"+port)

接下来是mime.js，一个用于显示文件类型的js文件

var mime = {

//查找文件后缀类型 lookupExtension : function(ext, fallback) { return mime.TYPES[ext.toLowerCase()] || fallback || 'text/plain'; },

//文件类型 TYPES : { ".3gp" : "video/3gpp" , ".a" : "application/octet-stream" , ".ai" : "application/postscript" , ".aif" : "audio/x-aiff" , ".aiff" : "audio/x-aiff" , ".asc" : "application/pgp-signature" , ".asf" : "video/x-ms-asf" , ".asm" : "text/x-asm" , ".asx" : "video/x-ms-asf" , ".atom" : "application/atom+xml" , ".au" : "audio/basic" , ".avi" : "video/x-msvideo" , ".bat" : "application/x-msdownload" , ".bin" : "application/octet-stream" , ".bmp" : "image/bmp" , ".bz2" : "application/x-bzip2" , ".c" : "text/x-c" , ".cab" : "application/vnd.ms-cab-compressed" , ".cc" : "text/x-c" , ".chm" : "application/vnd.ms-htmlhelp" , ".class" : "application/octet-stream" , ".com" : "application/x-msdownload" , ".conf" : "text/plain" , ".cpp" : "text/x-c" , ".crt" : "application/x-x509-ca-cert" , ".css" : "text/css" , ".csv" : "text/csv" , ".cxx" : "text/x-c" , ".deb" : "application/x-debian-package" , ".der" : "application/x-x509-ca-cert" , ".diff" : "text/x-diff" , ".djv" : "image/vnd.djvu" , ".djvu" : "image/vnd.djvu" , ".dll" : "application/x-msdownload" , ".dmg" : "application/octet-stream" , ".doc" : "application/msword" , ".dot" : "application/msword" , ".dtd" : "application/xml-dtd" , ".dvi" : "application/x-dvi" , ".ear" : "application/java-archive" , ".eml" : "message/rfc822" , ".eps" : "application/postscript" , ".exe" : "application/x-msdownload" , ".f" : "text/x-fortran" , ".f77" : "text/x-fortran" , ".f90" : "text/x-fortran" , ".flv" : "video/x-flv" , ".for" : "text/x-fortran" , ".gem" : "application/octet-stream" , ".gemspec" : "text/x-script.ruby" , ".gif" : "image/gif" , ".gz" : "application/x-gzip" , ".h" : "text/x-c" , ".hh" : "text/x-c" , ".htm" : "text/html" , ".html" : "text/html" , ".ico" : "image/vnd.microsoft.icon" , ".ics" : "text/calendar" , ".ifb" : "text/calendar" , ".iso" : "application/octet-stream" , ".jar" : "application/java-archive" , ".java" : "text/x-java-source" , ".jnlp" : "application/x-java-jnlp-file" , ".jpeg" : "image/jpeg" , ".jpg" : "image/jpeg" , ".js" : "application/javascript;charset=utf-8" , ".json" : "application/json" , ".log" : "text/plain;charset=utf-8" , ".m3u" : "audio/x-mpegurl" , ".m4v" : "video/mp4" , ".man" : "text/troff" , ".mathml" : "application/mathml+xml" , ".mbox" : "application/mbox" , ".mdoc" : "text/troff" , ".me" : "text/troff" , ".mid" : "audio/midi" , ".midi" : "audio/midi" , ".mime" : "message/rfc822" , ".mml" : "application/mathml+xml" , ".mng" : "video/x-mng" , ".mov" : "video/quicktime" , ".mp3" : "audio/mpeg" , ".mp4" : "video/mp4" , ".mp4v" : "video/mp4" , ".mpeg" : "video/mpeg" , ".mpg" : "video/mpeg" , ".ms" : "text/troff" , ".msi" : "application/x-msdownload" , ".odp" : "application/vnd.oasis.opendocument.presentation" , ".ods" : "application/vnd.oasis.opendocument.spreadsheet" , ".odt" : "application/vnd.oasis.opendocument.text" , ".ogg" : "application/ogg" , ".p" : "text/x-pascal" , ".pas" : "text/x-pascal" , ".pbm" : "image/x-portable-bitmap" , ".pdf" : "application/pdf" , ".pem" : "application/x-x509-ca-cert" , ".pgm" : "image/x-portable-graymap" , ".pgp" : "application/pgp-encrypted" , ".pkg" : "application/octet-stream" , ".pl" : "text/x-script.perl" , ".pm" : "text/x-script.perl-module" , ".png" : "image/png" , ".pnm" : "image/x-portable-anymap" , ".ppm" : "image/x-portable-pixmap" , ".pps" : "application/vnd.ms-powerpoint" , ".ppt" : "application/vnd.ms-powerpoint" , ".ps" : "application/postscript" , ".psd" : "image/vnd.adobe.photoshop" , ".py" : "text/x-script.python" , ".qt" : "video/quicktime" , ".ra" : "audio/x-pn-realaudio" , ".rake" : "text/x-script.ruby" , ".ram" : "audio/x-pn-realaudio" , ".rar" : "application/x-rar-compressed" , ".rb" : "text/x-script.ruby" , ".rdf" : "application/rdf+xml" , ".roff" : "text/troff" , ".rpm" : "application/x-redhat-package-manager" , ".rss" : "application/rss+xml" , ".rtf" : "application/rtf" , ".ru" : "text/x-script.ruby" , ".s" : "text/x-asm" , ".sgm" : "text/sgml" , ".sgml" : "text/sgml" , ".sh" : "application/x-sh" , ".sig" : "application/pgp-signature" , ".snd" : "audio/basic" , ".so" : "application/octet-stream" , ".svg" : "image/svg+xml" , ".svgz" : "image/svg+xml" , ".swf" : "application/x-shockwave-flash" , ".t" : "text/troff" , ".tar" : "application/x-tar" , ".tbz" : "application/x-bzip-compressed-tar" , ".tcl" : "application/x-tcl" , ".tex" : "application/x-tex" , ".texi" : "application/x-texinfo" , ".texinfo" : "application/x-texinfo" , ".text" : "text/plain" , ".tif" : "image/tiff" , ".tiff" : "image/tiff" , ".torrent" : "application/x-bittorrent" , ".tr" : "text/troff" , ".txt" : "text/plain" , ".vcf" : "text/x-vcard" , ".vcs" : "text/x-vcalendar" , ".vrml" : "model/vrml" , ".war" : "application/java-archive" , ".wav" : "audio/x-wav" , ".wma" : "audio/x-ms-wma" , ".wmv" : "video/x-ms-wmv" , ".wmx" : "video/x-ms-wmx" , ".wrl" : "model/vrml" , ".wsdl" : "application/wsdl+xml" , ".xbm" : "image/x-xbitmap" , ".xhtml" : "application/xhtml+xml" , ".xls" : "application/vnd.ms-excel" , ".xml" : "application/xml" , ".xpm" : "image/x-xpixmap" , ".xsl" : "application/xml" , ".xslt" : "application/xslt+xml" , ".yaml" : "text/yaml" , ".yml" : "text/yaml" , ".zip" : "application/zip" } };

exports.mime=mime;

      <br><br>
      作者: <a href="http://flyingzl.javaeye.com">flyingzl</a> 
      <br>
      声明: 本文系JavaEye网站发布的原创文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！
      <br><br>
      <span style="color:red">
        <a href="http://www.javaeye.com/topic/827328" style="color:red">已有 <strong>1</strong> 人发表回复，猛击-&gt;&gt;<strong>这里</strong>&lt;&lt;-参与讨论</a>
      </span>
      <br><br><br>

JavaEye推荐

—软件人才免语言低担保赴美带薪读研！—

Google Reader