forked from svrjs/svrjs
98 lines
4.8 KiB
JavaScript
98 lines
4.8 KiB
JavaScript
//Server-side Javascript (Node.js)
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//This implementation uses Node.js, which powers SVR.JS.
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//This implementation contains elements specific for SVR.JS mods:
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// req - A server request instance
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// res - A server response instance
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// serverconsole - A console output object for SVR.JS
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// responseEnd - Response ending method of SVR.JS
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// href - Request URL without query
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// ext - File extension of requested file
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// uobject - Request URL object
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// search - Request URL queries
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// defaultPage - An index page location (deprecated, always returns 'index.html')
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// users - A list of users (deprecated)
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// page404 - 404 Not Found page location
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// head - A head of server response
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// foot - A foot of server response
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// fd - Currently unused
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// elseCallback - Method summoning SVR.JS internal callbacks
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// callServerError - Method to end with server error
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// getCustomHeaders - Method to get headers defined in config.json file
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// origHref - Original request URL without query (before URL rewriting)
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// redirect - Method to redirect.
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// parsePostData - Method to parse POST data.
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// authUser - Authenticated HTTP user.
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//Along with elements added by this implementation:
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// disableEndElseCallbackExecute - Determines execution of elseCallback on end
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// filterHeaders - Removes invalid HTTP/1.0 headers
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// customvar1, customvar2, customvar3, customvar4 - Custom variables
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//Built-in libraries:
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// http
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// https
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// readline
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// os
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// url
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// hexstrbase64
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// fs
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// path
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// crypto
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// stream
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//If you send response remember and don't use disableEndElseCallbackExecute, use "return;", or else SVR.JS will crash.
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//If you use proxy, use filterHeaders to remove HTTP/2.0 headers, which are invalid in HTTP/1.0.
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//If you type no code, elseCallback is executed.
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//Below we have example script, which serves dynamic content.
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disableEndElseCallbackExecute = true; //Avoid crashing on async.
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var headers = getCustomHeaders(); //Headers
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if(!fs.existsSync(__dirname + "/../temp/requestCounter")) {
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fs.writeFileSync(__dirname + "/../temp/requestCounter","0"); //Reset counter
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}
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headers["Content-Type"] = 'text/html; charset=utf-8' //HTML output
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if(href == "/hello.svr") {
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fs.readFile(__dirname + "/../temp/requestCounter", (err,data) => {
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if(err) throw err;
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var requestCounter = parseInt(data.toString()); //Counter
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fs.writeFile(__dirname + "/../temp/requestCounter",(requestCounter + 1).toString(),() => {
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//Increase value of counter
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});
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res.writeHead(200, "OK", headers); //Write Head
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res.end("<html><head><title>SVR.JS ServerSide Test</title></head><body><h1>Hello World!</h1><p>This is a test from server-side JavaScript. This test is executed " + requestCounter.toString() + " times from taking server up." + (req.headers.origin == undefined ? "" : " This request is done from a proxy.") + "</p><p><i>SVR.JS/" + configJSON.version + ' (' + os.platform()[0].toUpperCase() + os.platform().slice(1) + ')' + (req.headers.host == undefined ? "" : " on " + req.headers.host) + "</p></body></html>"); //Write response
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serverconsole.resmessage("Client successfully recieved content."); //Log into SVR.JS
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return; //Prevent SVR.JS from crashing
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});
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} else if(href == "/proxy.svr") {
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callServerError(403,"SVR.JS-exampleproxy"); //Server error
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serverconsole.errmessage("Client fails to recieve content."); //Log into SVR.JS
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} else if(href.indexOf("/proxy.svr/") == 0) {
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var hn = href.split("/")[2]; //Hostname
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if(hn != "this" && !(req.socket.realRemoteAddress ? req.socket.realRemoteAddress : req.socket.remoteAddress).match(/^(?:localhost$|::1$|f[c-d][0-9a-f]{2}:|(?:::ffff:)?(?:(?:127|10)\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}|192\.168\.[0-9]{1,3}\.[0-9]{1,3}|172\.(?:1[6-9]|2[0-9]|3[0-1])\.[0-9]{1,3}\.[0-9]{1,3})$)/i) ) {
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//Prevent open proxy
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callServerError(403,"SVR.JS-exampleproxy"); //Server error
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serverconsole.errmessage("Client fails to recieve content."); //Log into SVR.JS
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return;
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}
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var hdrs = req.headers;
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hdrs["Host"] = (hn == "this" ? req.headers.host : hn);
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hdrs["Origin"] = (req.headers.host == undefined ? "" : req.headers.host);
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var options = {
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hostname: (hn == "this" ? req.headers.host.split(":")[0] : hn.split(":")[0]),
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port: (hn == "this" ? req.headers.host.split(":")[1] : (hn.split(":")[1] == undefined ? 80 : hn.split(":")[1])),
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path: req.url.replace("/proxy.svr/" + hn,""),
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method: req.method,
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headers: filterHeaders(hdrs)
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};
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var proxy = http.request(options, function (sres) {
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res.writeHead(sres.statusCode, sres.headers)
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sres.pipe(res, {
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end: true
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});
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});
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proxy.on("error",(ex) => {
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callServerError(500,"SVR.JS-exampleproxy",ex.stack); //Server error
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serverconsole.errmessage("Client fails to recieve content."); //Log into SVR.JS
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});
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req.pipe(proxy, {
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end: true
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});
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} else {
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elseCallback(); //Load SVR.JS internal callbacks
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}
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