技术标签： Linux 与运维 Node.js nodejs
时下不少场景，都是申请一个 VPS 主机来托管运行 Web 项目的，小弟我也不例外——购买了一个小型的 CentOS VPS 使用着。在使用的过程中，面临一个问题，就是同一类型的服务端环境还好——但如果是一个 PHP、一个 ASP、 一个 JSP 的三种类型的服务端项目并存着，该怎么分配唯一的 80 端口呢？因为商业 WWW 网站的话，往往只能占用 80 端口，——当然，如果只是做服务的话，如接口服务之类的，使用了其他端口就不会与 80 端口冲突。因此，许多开发者都会面临到 80 端口这个问题，并且实际情况会受到成本的限制。如果为一个项目就单独买一个 VPS 的话，着实不太经济、不太合算，管理起来也不方便。这样的话，我们就应该好好考虑一下，怎么在提供一个 80 端口的情况下，分发到多种服务端那里去，最终让不同的主机执行各自的 Web 项目。
亲，那么这项需求是可以实现的吗？是的，而且并不是什么“神奇的技术”，也不是什么复杂的技术。不知你是否有了解，网络服务中的“反向代理（Reverse Proxy）”，其中的一个功能就是可以完成端口的分发的。我们不妨以域名为“路由分发”：凡是 AA.com 域名请求的，分发到 PHP 82 端口执行；凡是 BB.com 域名请求的，分发到 ASP 83 端口执行；…… 如此类推。当然这里的端口只说说明用而已，您可以任意配置，反正就是从 80 端口接收回来的请求，先作一次处理，进而分发。反向代理，通俗地讲，就是左手转右手而已。
每当提起反向代理器，人们通常一想到的就是 Nginx，但是今天我们暂时忽略大名鼎鼎的 Nginx，采用同样也是使用单线程、事件循环的服务端小弟——Node 来达成。首先 Node 采用 JS 作服务端编程，而不是 Nginx 写配置或 Lua，比较符合我的味口，其次自己对 Node 也比较熟悉，配置各方面什么的更为顺手。
完成该项功能的是 node-http-proxy 包。下载、安装请键入：
npm install http-proxy安装完毕后，新建一个 proxy.js 文件，输入：
var http = require('http'), httpProxy = require('http-proxy');
// 新建一个代理 Proxy Server 对象
var proxy = httpProxy.createProxyServer({});
// 捕获异常
proxy.on('error', function (err, req, res) {
res.writeHead(500, {
'Content-Type': 'text/plain'
});
res.end('Something went wrong. And we are reporting a custom error message.');
});
// 另外新建一个 HTTP 80 端口的服务器，也就是常规 Node 创建 HTTP 服务器的方法。
// 在每次请求中，调用 proxy.web(req, res config) 方法进行请求分发
var server = require('http').createServer(function(req, res) {
// 在这里可以自定义你的路由分发
var host = req.headers.host, ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
console.log("client ip:" + ip + ", host:" + host);
switch(host){
case 'aaaa.com':
case 'bbs.aaaa.com':
proxy.web(req, res, { target: 'http://xyd.bbbbb.com:82' });
break;
case 'vps.cccc.com':
proxy.web(req, res, { target: 'http://xyd.bbbbb.com:8080' });
break;
case 'dddd.com':
case 'www.dddd.com':
proxy.web(req, res, { target: 'http://localhost:81' });
break;
case 'eeeeee.com.cn':
case 'www.eeee.com.cn':
proxy.web(req, res, { target: 'http://eeeee.com.cn:8082' });
break;
default:
res.writeHead(200, {
'Content-Type': 'text/plain'
});
res.end('Welcome to my server!');
}
});
console.log("listening on port 80")
server.listen(80);除此之外，还可以利用 node-http-proxy 做负载均衡、Websocket （使用 proxy.ws() 语法）等相关的工作。
若说使用代理服务器的代价，可能就是会比不用消耗多的资源，消耗多的 CPU 运算罢了。
使用问题：不能指定文件夹 proxy.web(req, res, { target: 'http://housecn.com.cn:81/foo/' });
可以在一个主机上配置多个网站了：2015--5-28:
switch(host){
case '5222222.com':
case 'www.5222222.com':
if(req.url.indexOf('/grand') != -1){
proxy.web(req, res, { target: 'http://127.0.0.1:8081' });
}else{
res.writeHead(302, {
// 'Location': 'http://new.5222222.com:8080/grand/'
'Location': 'http://5222222.com/grand/'
});
res.end();
}
break;
....
}
资源:
附带一个 静态服务器
const http = require('http'); //引入node http模块
const fs = require('fs'); //引入node 文件读写fs模块
const path = require('path'); //引入 node path模块
const url = require('url'); //引入 url 模块
const resMime = require('./resMime.js'); //引入自定义模块，模块主要处理响应头
const config = {
port: 8888,
webRoot: require('os').type() == 'Darwin' ? '/Users/xinzhang/dev/project/aj-ts/' : 'C:\\project\\aj-ts'
};
const server = http.createServer((req, res) => { // http.createServer()创建服务器
let pathName = url.parse(req.url).pathname; // 获取req.url,并且转换请求的路径
// console.log(url.parse('index.html/12323123')); 会得到 index.html
// console.log(pathName); // 控制台打印看能不能得到请求路径
if (pathName == '/') // 如果请求为空或“/”，则把请求路径改为index.html
pathName = '/index.html';
if (pathName == '/favicon.ico') // 如果请求为“/favicon.ico”图标,则直接结束不处理
res.end();
else {
// 这里正式写处理逻辑
// console.log('开始读取文件');
let extName = path.extname(pathName);//拿到扩展名（比如说：'index.html' => '.html'）
// 下面用到 fs 去读取客户端请求的文件，path.join拼接成绝对路径
fs.readFile(path.join(config.webRoot || __dirname, pathName), function (err, data) { // 绝对路径，path.jion(__dirname,pathName)
if (err) {
// 没有找到的话，就走ERR，转去加载404页面
console.log(err);
res.writeHead(404, { "Content-Type": "text/html;chartset='utf8'" })
res.write("Not found"); // 把文件写回客户端
res.end(); // 结束
// fs.readFile(path.join(config.webRoot || __dirname, `404.html`), (err, data) => {
// // res.writeHead()向客户端返回响应头，状态码404，因为返回的是自己写的404页面，所以响应头应该为"Content-Type":"text/html;chartset='utf8'"
// res.writeHead(404, { "Content-Type": "text/html;chartset='utf8'" })
// res.write(data); // 把文件写回客户端
// res.end(); // 结束
// })
} else {
// 这里fs找到了请求资源
// console.log(data) // 打印看看资源的内容
var mime = resMime.getMime(fs, extName); // 调用外部模块resMime,这个模块我是用来，请求的文件后缀名转换成mime标准的响应头Content-Type类型（比如说：'.css'=>'text/css','.js'=>'text/javascript'）
res.writeHead(200, { "Content-Type": `${mime};chartset='utf8'` });
res.write(data); // 把文件写回客户端
res.end(); // 结束
}
});
}
});
server.listen(config.port); // 让服务器跑在8887端口
console.log('Server ready');resMime.js
const Mimes = {
".323": "text/h323",
".3gp": "video/3gpp",
".aab": "application/x-authoware-bin",
".aam": "application/x-authoware-map",
".aas": "application/x-authoware-seg",
".acx": "application/internet-property-stream",
".ai": "application/postscript",
".aif": "audio/x-aiff",
".aifc": "audio/x-aiff",
".aiff": "audio/x-aiff",
".als": "audio/X-Alpha5",
".amc": "application/x-mpeg",
".ani": "application/octet-stream",
".apk": "application/vnd.android.package-archive",
".asc": "text/plain",
".asd": "application/astound",
".asf": "video/x-ms-asf",
".asn": "application/astound",
".asp": "application/x-asap",
".asr": "video/x-ms-asf",
".asx": "video/x-ms-asf",
".au": "audio/basic",
".avb": "application/octet-stream",
".avi": "video/x-msvideo",
".awb": "audio/amr-wb",
".axs": "application/olescript",
".bas": "text/plain",
".bcpio": "application/x-bcpio",
".bin ": "application/octet-stream",
".bld": "application/bld",
".bld2": "application/bld2",
".bmp": "image/bmp",
".bpk": "application/octet-stream",
".bz2": "application/x-bzip2",
".c": "text/plain",
".cal": "image/x-cals",
".cat": "application/vnd.ms-pkiseccat",
".ccn": "application/x-cnc",
".cco": "application/x-cocoa",
".cdf": "application/x-cdf",
".cer": "application/x-x509-ca-cert",
".cgi": "magnus-internal/cgi",
".chat": "application/x-chat",
".class": "application/octet-stream",
".clp": "application/x-msclip",
".cmx": "image/x-cmx",
".co": "application/x-cult3d-object",
".cod": "image/cis-cod",
".conf": "text/plain",
".cpio": "application/x-cpio",
".cpp": "text/plain",
".cpt": "application/mac-compactpro",
".crd": "application/x-mscardfile",
".crl": "application/pkix-crl",
".crt": "application/x-x509-ca-cert",
".csh": "application/x-csh",
".csm": "chemical/x-csml",
".csml": "chemical/x-csml",
".css": "text/css",
".cur": "application/octet-stream",
".dcm": "x-lml/x-evm",
".dcr": "application/x-director",
".dcx": "image/x-dcx",
".der": "application/x-x509-ca-cert",
".dhtml": "text/html",
".dir": "application/x-director",
".dll": "application/x-msdownload",
".dmg": "application/octet-stream",
".dms": "application/octet-stream",
".doc": "application/msword",
".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
".dot": "application/msword",
".dvi": "application/x-dvi",
".dwf": "drawing/x-dwf",
".dwg": "application/x-autocad",
".dxf": "application/x-autocad",
".dxr": "application/x-director",
".ebk": "application/x-expandedbook",
".emb": "chemical/x-embl-dl-nucleotide",
".embl": "chemical/x-embl-dl-nucleotide",
".eps": "application/postscript",
".epub": "application/epub+zip",
".eri": "image/x-eri",
".es": "audio/echospeech",
".esl": "audio/echospeech",
".etc": "application/x-earthtime",
".etx": "text/x-setext",
".evm": "x-lml/x-evm",
".evy": "application/envoy",
".exe": "application/octet-stream",
".fh4": "image/x-freehand",
".fh5": "image/x-freehand",
".fhc": "image/x-freehand",
".fif": "application/fractals",
".flr": "x-world/x-vrml",
".flv": "flv-application/octet-stream",
".fm": "application/x-maker",
".fpx": "image/x-fpx",
".fvi": "video/isivideo",
".gau": "chemical/x-gaussian-input",
".gca": "application/x-gca-compressed",
".gdb": "x-lml/x-gdb",
".gif": "image/gif",
".gps": "application/x-gps",
".gtar": "application/x-gtar",
".gz": "application/x-gzip",
".h": "text/plain",
".hdf": "application/x-hdf",
".hdm": "text/x-hdml",
".hdml": "text/x-hdml",
".hlp": "application/winhlp",
".hqx": "application/mac-binhex40",
".hta": "application/hta",
".htc": "text/x-component",
".htm": "text/html",
".html": "text/html",
".hts": "text/html",
".htt": "text/webviewhtml",
".ice": "x-conference/x-cooltalk",
".ico": "image/x-icon",
".ief": "image/ief",
".ifm": "image/gif",
".ifs": "image/ifs",
".iii": "application/x-iphone",
".imy": "audio/melody",
".ins": "application/x-internet-signup",
".ips": "application/x-ipscript",
".ipx": "application/x-ipix",
".isp": "application/x-internet-signup",
".it": "audio/x-mod",
".itz": "audio/x-mod",
".ivr": "i-world/i-vrml",
".j2k": "image/j2k",
".jad": "text/vnd.sun.j2me.app-descriptor",
".jam": "application/x-jam",
".jar": "application/java-archive",
".java": "text/plain",
".jfif": "image/pipeg",
".jnlp": "application/x-java-jnlp-file",
".jpe": "image/jpeg",
".jpeg": "image/jpeg",
".jpg": "image/jpeg",
".jpz": "image/jpeg",
".js": "application/x-javascript",
".jwc": "application/jwc",
".kjx": "application/x-kjx",
".lak": "x-lml/x-lak",
".latex": "application/x-latex",
".lcc": "application/fastman",
".lcl": "application/x-digitalloca",
".lcr": "application/x-digitalloca",
".lgh": "application/lgh",
".lha": "application/octet-stream",
".lml": "x-lml/x-lml",
".lmlpack": "x-lml/x-lmlpack",
".log": "text/plain",
".lsf": "video/x-la-asf",
".lsx": "video/x-la-asf",
".lzh": "application/octet-stream",
".m13": "application/x-msmediaview",
".m14": "application/x-msmediaview",
".m15": "audio/x-mod",
".m3u": "audio/x-mpegurl",
".m3url": "audio/x-mpegurl",
".m4a": "audio/mp4a-latm",
".m4b": "audio/mp4a-latm",
".m4p": "audio/mp4a-latm",
".m4u": "video/vnd.mpegurl",
".m4v": "video/x-m4v",
".ma1": "audio/ma1",
".ma2": "audio/ma2",
".ma3": "audio/ma3",
".ma5": "audio/ma5",
".man": "application/x-troff-man",
".map": "magnus-internal/imagemap",
".mbd": "application/mbedlet",
".mct": "application/x-mascot",
".mdb": "application/x-msaccess",
".mdz": "audio/x-mod",
".me": "application/x-troff-me",
".mel": "text/x-vmel",
".mht": "message/rfc822",
".mhtml": "message/rfc822",
".mi": "application/x-mif",
".mid": "audio/mid",
".midi": "audio/midi",
".mif": "application/x-mif",
".mil": "image/x-cals",
".mio": "audio/x-mio",
".mmf": "application/x-skt-lbs",
".mng": "video/x-mng",
".mny": "application/x-msmoney",
".moc": "application/x-mocha",
".mocha": "application/x-mocha",
".mod": "audio/x-mod",
".mof": "application/x-yumekara",
".mol": "chemical/x-mdl-molfile",
".mop": "chemical/x-mopac-input",
".mov": "video/quicktime",
".movie": "video/x-sgi-movie",
".mp2": "video/mpeg",
".mp3": "audio/mpeg",
".mp4": "video/mp4",
".mpa": "video/mpeg",
".mpc": "application/vnd.mpohun.certificate",
".mpe": "video/mpeg",
".mpeg": "video/mpeg",
".mpg": "video/mpeg",
".mpg4": "video/mp4",
".mpga": "audio/mpeg",
".mpn": "application/vnd.mophun.application",
".mpp": "application/vnd.ms-project",
".mps": "application/x-mapserver",
".mpv2": "video/mpeg",
".mrl": "text/x-mrml",
".mrm": "application/x-mrm",
".ms": "application/x-troff-ms",
".msg": "application/vnd.ms-outlook",
".mts": "application/metastream",
".mtx": "application/metastream",
".mtz": "application/metastream",
".mvb": "application/x-msmediaview",
".mzv": "application/metastream",
".nar": "application/zip",
".nbmp": "image/nbmp",
".nc": "application/x-netcdf",
".ndb": "x-lml/x-ndb",
".ndwn": "application/ndwn",
".nif": "application/x-nif",
".nmz": "application/x-scream",
".nokia-op-logo": "image/vnd.nok-oplogo-color",
".npx": "application/x-netfpx",
".nsnd": "audio/nsnd",
".nva": "application/x-neva1",
".nws": "message/rfc822",
".oda": "application/oda",
".ogg": "audio/ogg",
".oom": "application/x-AtlasMate-Plugin",
".p10": "application/pkcs10",
".p12": "application/x-pkcs12",
".p7b": "application/x-pkcs7-certificates",
".p7c": "application/x-pkcs7-mime",
".p7m": "application/x-pkcs7-mime",
".p7r": "application/x-pkcs7-certreqresp",
".p7s": "application/x-pkcs7-signature",
".pac": "audio/x-pac",
".pae": "audio/x-epac",
".pan": "application/x-pan",
".pbm": "image/x-portable-bitmap",
".pcx": "image/x-pcx",
".pda": "image/x-pda",
".pdb": "chemical/x-pdb",
".pdf": "application/pdf",
".pfr": "application/font-tdpfr",
".pfx": "application/x-pkcs12",
".pgm": "image/x-portable-graymap",
".pict": "image/x-pict",
".pko": "application/ynd.ms-pkipko",
".pm": "application/x-perl",
".pma": "application/x-perfmon",
".pmc": "application/x-perfmon",
".pmd": "application/x-pmd",
".pml": "application/x-perfmon",
".pmr": "application/x-perfmon",
".pmw": "application/x-perfmon",
".png": "image/png",
".pnm": "image/x-portable-anymap",
".pnz": "image/png",
".pot,": "application/vnd.ms-powerpoint",
".ppm": "image/x-portable-pixmap",
".pps": "application/vnd.ms-powerpoint",
".ppt": "application/vnd.ms-powerpoint",
".pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
".pqf": "application/x-cprplayer",
".pqi": "application/cprplayer",
".prc": "application/x-prc",
".prf": "application/pics-rules",
".prop": "text/plain",
".proxy": "application/x-ns-proxy-autoconfig",
".ps": "application/postscript",
".ptlk": "application/listenup",
".pub": "application/x-mspublisher",
".pvx": "video/x-pv-pvx",
".qcp": "audio/vnd.qcelp",
".qt": "video/quicktime",
".qti": "image/x-quicktime",
".qtif": "image/x-quicktime",
".r3t": "text/vnd.rn-realtext3d",
".ra": "audio/x-pn-realaudio",
".ram": "audio/x-pn-realaudio",
".rar": "application/octet-stream",
".ras": "image/x-cmu-raster",
".rc": "text/plain",
".rdf": "application/rdf+xml",
".rf": "image/vnd.rn-realflash",
".rgb": "image/x-rgb",
".rlf": "application/x-richlink",
".rm": "audio/x-pn-realaudio",
".rmf": "audio/x-rmf",
".rmi": "audio/mid",
".rmm": "audio/x-pn-realaudio",
".rmvb": "audio/x-pn-realaudio",
".rnx": "application/vnd.rn-realplayer",
".roff": "application/x-troff",
".rp": "image/vnd.rn-realpix",
".rpm": "audio/x-pn-realaudio-plugin",
".rt": "text/vnd.rn-realtext",
".rte": "x-lml/x-gps",
".rtf": "application/rtf",
".rtg": "application/metastream",
".rtx": "text/richtext",
".rv": "video/vnd.rn-realvideo",
".rwc": "application/x-rogerwilco",
".s3m": "audio/x-mod",
".s3z": "audio/x-mod",
".sca": "application/x-supercard",
".scd": "application/x-msschedule",
".sct": "text/scriptlet",
".sdf": "application/e-score",
".sea": "application/x-stuffit",
".setpay": "application/set-payment-initiation",
".setreg": "application/set-registration-initiation",
".sgm": "text/x-sgml",
".sgml": "text/x-sgml",
".sh": "application/x-sh",
".shar": "application/x-shar",
".shtml": "magnus-internal/parsed-html",
".shw": "application/presentations",
".si6": "image/si6",
".si7": "image/vnd.stiwap.sis",
".si9": "image/vnd.lgtwap.sis",
".sis": "application/vnd.symbian.install",
".sit": "application/x-stuffit",
".skd": "application/x-Koan",
".skm": "application/x-Koan",
".skp": "application/x-Koan",
".skt": "application/x-Koan",
".slc": "application/x-salsa",
".smd": "audio/x-smd",
".smi": "application/smil",
".smil": "application/smil",
".smp": "application/studiom",
".smz": "audio/x-smd",
".snd": "audio/basic",
".spc": "application/x-pkcs7-certificates",
".spl": "application/futuresplash",
".spr": "application/x-sprite",
".sprite": "application/x-sprite",
".sdp": "application/sdp",
".spt": "application/x-spt",
".src": "application/x-wais-source",
".sst": "application/vnd.ms-pkicertstore",
".stk": "application/hyperstudio",
".stl": "application/vnd.ms-pkistl",
".stm": "text/html",
".svg": "image/svg+xml",
".sv4cpio": "application/x-sv4cpio",
".sv4crc": "application/x-sv4crc",
".svf": "image/vnd",
".svg": "image/svg+xml",
".svh": "image/svh",
".svr": "x-world/x-svr",
".swf": "application/x-shockwave-flash",
".swfl": "application/x-shockwave-flash",
".t": "application/x-troff",
".tad": "application/octet-stream",
".talk": "text/x-speech",
".tar": "application/x-tar",
".taz": "application/x-tar",
".tbp": "application/x-timbuktu",
".tbt": "application/x-timbuktu",
".tcl": "application/x-tcl",
".tex": "application/x-tex",
".texi": "application/x-texinfo",
".texinfo": "application/x-texinfo",
".tgz": "application/x-compressed",
".thm": "application/vnd.eri.thm",
".tif": "image/tiff",
".tiff": "image/tiff",
".tki": "application/x-tkined",
".tkined": "application/x-tkined",
".toc": "application/toc",
".toy": "image/toy",
".tr": "application/x-troff",
".trk": "x-lml/x-gps",
".trm": "application/x-msterminal",
".tsi": "audio/tsplayer",
".tsp": "application/dsptype",
".tsv": "text/tab-separated-values",
".ttf": "application/octet-stream",
".ttz": "application/t-time",
".txt": "text/plain",
".uls": "text/iuls",
".ult": "audio/x-mod",
".ustar": "application/x-ustar",
".uu": "application/x-uuencode",
".uue": "application/x-uuencode",
".vcd": "application/x-cdlink",
".vcf": "text/x-vcard",
".vdo": "video/vdo",
".vib": "audio/vib",
".viv": "video/vivo",
".vivo": "video/vivo",
".vmd": "application/vocaltec-media-desc",
".vmf": "application/vocaltec-media-file",
".vmi": "application/x-dreamcast-vms-info",
".vms": "application/x-dreamcast-vms",
".vox": "audio/voxware",
".vqe": "audio/x-twinvq-plugin",
".vqf": "audio/x-twinvq",
".vql": "audio/x-twinvq",
".vre": "x-world/x-vream",
".vrml": "x-world/x-vrml",
".vrt": "x-world/x-vrt",
".vrw": "x-world/x-vream",
".vts": "workbook/formulaone",
".wav": "audio/x-wav",
".wax": "audio/x-ms-wax",
".wbmp": "image/vnd.wap.wbmp",
".wcm": "application/vnd.ms-works",
".wdb": "application/vnd.ms-works",
".web": "application/vnd.xara",
".wi": "image/wavelet",
".wis": "application/x-InstallShield",
".wks": "application/vnd.ms-works",
".wm": "video/x-ms-wm",
".wma": "audio/x-ms-wma",
".wmd": "application/x-ms-wmd",
".wmf": "application/x-msmetafile",
".wml": "text/vnd.wap.wml",
".wmlc": "application/vnd.wap.wmlc",
".wmls": "text/vnd.wap.wmlscript",
".wmlsc": "application/vnd.wap.wmlscriptc",
".wmlscript": "text/vnd.wap.wmlscript",
".wmv": "audio/x-ms-wmv",
".wmx": "video/x-ms-wmx",
".wmz": "application/x-ms-wmz",
".wpng": "image/x-up-wpng",
".wps": "application/vnd.ms-works",
".wpt": "x-lml/x-gps",
".wri": "application/x-mswrite",
".wrl": "x-world/x-vrml",
".wrz": "x-world/x-vrml",
".ws": "text/vnd.wap.wmlscript",
".wsc": "application/vnd.wap.wmlscriptc",
".wv": "video/wavelet",
".wvx": "video/x-ms-wvx",
".wxl": "application/x-wxl",
".x-gzip": "application/x-gzip",
".xaf": "x-world/x-vrml",
".xar": "application/vnd.xara",
".xbm": "image/x-xbitmap",
".xdm": "application/x-xdma",
".xdma": "application/x-xdma",
".xdw": "application/vnd.fujixerox.docuworks",
".xht": "application/xhtml+xml",
".xhtm": "application/xhtml+xml",
".xhtml": "application/xhtml+xml",
".xla": "application/vnd.ms-excel",
".xlc": "application/vnd.ms-excel",
".xll": "application/x-excel",
".xlm": "application/vnd.ms-excel",
".xls": "application/vnd.ms-excel",
".xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
".xlt": "application/vnd.ms-excel",
".xlw": "application/vnd.ms-excel",
".xm": "audio/x-mod",
".xml": "text/plain",
".xml": "application/xml",
".xmz": "audio/x-mod",
".xof": "x-world/x-vrml",
".xpi": "application/x-xpinstall",
".xpm": "image/x-xpixmap",
".xsit": "text/xml",
".xsl": "text/xml",
".xul": "text/xul",
".xwd": "image/x-xwindowdump",
".xyz": "chemical/x-pdb",
".yz1": "application/x-yz1",
".z": "application/x-compress",
".zac": "application/x-zaurus-zac",
".zip": "application/zip",
".json": "application/json"
};
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