Move core middleware to the request handler.

src/handlers/requestHandler.js

@@ -1,3 +1,11 @@
+const http = require("http");
+const fs = require("fs");
+const net = require("net");
+const generateErrorStack = require("../utils/generateErrorStack.js");
+const serverHTTPErrorDescs = require("../res/httpErrorDescriptions.js");
+const fixNodeMojibakeURL = require("../utils/urlMojibakeFixer.js");
+const ipMatch = require("../utils/ipMatch.js");
+const matchHostname = require("../utils/matchHostname.js");
 const generateServerString = require("../utils/generateServerString.js");
 let serverconsole = {};
 let middleware = [];
@@ -22,6 +30,681 @@ function requestHandler(req, res) {
   // SVR.JS configuration object (modified)
   const config = Object.assign(process.serverConfig);
 
+  config.generateServerString = () => {
+    return generateServerString(config.exposeServerVersion);
+  };
+
+  // getCustomHeaders() in SVR.JS 3.x
+  config.getCustomHeaders = () => {
+    let ph = Object.assign(config.customHeaders);
+    if (config.customHeadersVHost) {
+      let vhostP = null;
+      config.customHeadersVHost.every(function (vhost) {
+        if (
+          matchHostname(vhost.host, req.headers.host) &&
+          ipMatch(vhost.ip, req.socket ? req.socket.localAddress : undefined)
+        ) {
+          vhostP = vhost;
+          return false;
+        } else {
+          return true;
+        }
+      });
+      if (vhostP && vhostP.headers) {
+        const phNu = Object.assign(vhostP.headers);
+        Object.keys(phNu).forEach(function (phNuK) {
+          ph[phNuK] = phNu[phNuK];
+        });
+      }
+    }
+    Object.keys(ph).forEach(function (phk) {
+      if (typeof ph[phk] == "string")
+        ph[phk] = ph[phk].replace(/\{path\}/g, req.url);
+    });
+    ph["Server"] = config.generateServerString();
+    return ph;
+  };
+
+  // Estimate fromMain from SVR.JS 3.x
+  let fromMain = !(config.secure && !req.socket.encrypted);
+
+  // Make HTTP/1.x API-based scripts compatible with HTTP/2.0 API
+  if (config.enableHTTP2 == true && req.httpVersion == "2.0") {
+    // Set HTTP/1.x methods (to prevent process warnings)
+    res.writeHeadNodeApi = res.writeHead;
+    res.setHeaderNodeApi = res.setHeader;
+
+    res.writeHead = function (a, b, c) {
+      let table = c;
+      if (typeof b == "object") table = b;
+      if (table == undefined) table = this.tHeaders;
+      if (table == undefined) table = {};
+      table = Object.assign(table);
+      Object.keys(table).forEach(function (key) {
+        const al = key.toLowerCase();
+        if (
+          al == "transfer-encoding" ||
+          al == "connection" ||
+          al == "keep-alive" ||
+          al == "upgrade"
+        )
+          delete table[key];
+      });
+      if (res.stream && res.stream.destroyed) {
+        return false;
+      } else {
+        return res.writeHeadNodeApi(a, table);
+      }
+    };
+    res.setHeader = function (headerName, headerValue) {
+      const al = headerName.toLowerCase();
+      if (
+        al != "transfer-encoding" &&
+        al != "connection" &&
+        al != "keep-alive" &&
+        al != "upgrade"
+      )
+        return res.setHeaderNodeApi(headerName, headerValue);
+      return false;
+    };
+
+    // Set HTTP/1.x headers
+    if (!req.headers.host) req.headers.host = req.headers[":authority"];
+    if (!req.url) req.url = req.headers[":path"];
+    if (!req.protocol) req.protocol = req.headers[":scheme"];
+    if (!req.method) req.method = req.headers[":method"];
+    if (
+      req.headers[":path"] == undefined ||
+      req.headers[":method"] == undefined
+    ) {
+      let err = new Error(
+        'Either ":path" or ":method" pseudoheader is missing.',
+      );
+      if (Buffer.alloc) err.rawPacket = Buffer.alloc(0);
+      if (req.socket && req.socket.server)
+        req.socket.server.emit("clientError", err, req.socket);
+    }
+  }
+
+  /*if (req.headers["x-svr-js-from-main-thread"] == "true" && req.socket && (!req.socket.remoteAddress || req.socket.remoteAddress == "::1" || req.socket.remoteAddress == "::ffff:127.0.0.1" || req.socket.remoteAddress == "127.0.0.1" || req.socket.remoteAddress == "localhost" || req.socket.remoteAddress == host || req.socket.remoteAddress == "::ffff:" + host)) {
+      let headers = config.getCustomHeaders();
+      res.writeHead(204, http.STATUS_CODES[204], headers);
+      res.end();
+      return;
+    }*/
+
+  req.url = fixNodeMojibakeURL(req.url);
+
+  let headWritten = false;
+  let lastStatusCode = null;
+  res.writeHeadNative = res.writeHead;
+  res.writeHead = (code, codeDescription, headers) => {
+    if (
+      !(
+        headWritten &&
+        process.isBun &&
+        code === lastStatusCode &&
+        codeDescription === undefined &&
+        codeDescription === undefined
+      )
+    ) {
+      if (headWritten) {
+        process.emitWarning("res.writeHead called multiple times.", {
+          code: "WARN_SVRJS_MULTIPLE_WRITEHEAD",
+        });
+        return res;
+      } else {
+        headWritten = true;
+      }
+      if (code >= 400 && code <= 599) {
+        if (code >= 400 && code <= 499) process.err4xxcounter++;
+        else if (code >= 500 && code <= 599) process.err5xxcounter++;
+        logFacilities.errmessage(
+          "Server responded with " + code.toString() + " code.",
+        );
+      } else {
+        logFacilities.resmessage(
+          "Server responded with " + code.toString() + " code.",
+        );
+      }
+      if (typeof codeDescription != "string" && http.STATUS_CODES[code]) {
+        if (!headers) headers = codeDescription;
+        codeDescription = http.STATUS_CODES[code];
+      }
+      lastStatusCode = code;
+    }
+    res.writeHeadNative(code, codeDescription, headers);
+  };
+
+  let finished = false;
+  res.on("finish", () => {
+    if (!finished) {
+      finished = true;
+      logFacilities.locmessage("Client disconnected.");
+    }
+  });
+  res.on("close", () => {
+    if (!finished) {
+      finished = true;
+      logFacilities.locmessage("Client disconnected.");
+    }
+  });
+
+  req.isProxy = false;
+  if (req.url[0] != "/" && req.url != "*") req.isProxy = true;
+  logFacilities.locmessage(
+    "Somebody connected to " +
+      (config.secure && fromMain
+        ? (typeof config.sport == "number" ? "port " : "socket ") + config.sport
+        : (typeof config.port == "number" ? "port " : "socket ") +
+          config.port) +
+      "...",
+  );
+
+  if (req.socket == null) {
+    logFacilities.errmessage("Client socket is null!!!");
+    return;
+  }
+
+  // Set up X-Forwarded-For
+  let reqip = req.socket.remoteAddress;
+  let reqport = req.socket.remotePort;
+  let oldip = "";
+  let oldport = "";
+  let isForwardedValid = true;
+  if (config.enableIPSpoofing) {
+    if (req.headers["x-forwarded-for"] != undefined) {
+      let preparedReqIP = req.headers["x-forwarded-for"]
+        .split(",")[0]
+        .replace(/ /g, "");
+      let preparedReqIPvalid = net.isIP(preparedReqIP);
+      if (preparedReqIPvalid) {
+        if (
+          preparedReqIPvalid == 4 &&
+          req.socket.remoteAddress &&
+          req.socket.remoteAddress.indexOf(":") > -1
+        )
+          preparedReqIP = "::ffff:" + preparedReqIP;
+        reqip = preparedReqIP;
+        reqport = null;
+        try {
+          oldport = req.socket.remotePort;
+          oldip = req.socket.remoteAddress;
+          req.socket.realRemotePort = reqport;
+          req.socket.realRemoteAddress = reqip;
+          req.socket.originalRemotePort = oldport;
+          req.socket.originalRemoteAddress = oldip;
+          res.socket.realRemotePort = reqport;
+          res.socket.realRemoteAddress = reqip;
+          res.socket.originalRemotePort = oldport;
+          res.socket.originalRemoteAddress = oldip;
+        } catch (err) {
+          // Address setting failed
+        }
+      } else {
+        isForwardedValid = false;
+      }
+    }
+  }
+
+  process.reqcounter++;
+
+  // Process the Host header
+  let oldHostHeader = req.headers.host;
+  if (typeof req.headers.host == "string") {
+    req.headers.host = req.headers.host.toLowerCase();
+    if (!req.headers.host.match(/^\.+$/))
+      req.headers.host = req.headers.host.replace(/\.$/g, "");
+  }
+
+  logFacilities.reqmessage(
+    "Client " +
+      (!reqip || reqip == ""
+        ? "[unknown client]"
+        : reqip +
+          (reqport && reqport !== 0 && reqport != "" ? ":" + reqport : "")) +
+      " wants " +
+      (req.method == "GET"
+        ? "content in "
+        : req.method == "POST"
+          ? "to post content in "
+          : req.method == "PUT"
+            ? "to add content in "
+            : req.method == "DELETE"
+              ? "to delete content in "
+              : req.method == "PATCH"
+                ? "to patch content in "
+                : "to access content using " + req.method + " method in ") +
+      (req.headers.host == undefined || req.isProxy ? "" : req.headers.host) +
+      req.url,
+  );
+  if (req.headers["user-agent"] != undefined)
+    logFacilities.reqmessage("Client uses " + req.headers["user-agent"]);
+  if (oldHostHeader && oldHostHeader != req.headers.host)
+    logFacilities.resmessage(
+      "Host name rewritten: " + oldHostHeader + " => " + req.headers.host,
+    );
+
+  // Header and footer placeholders
+  res.head = "";
+  res.foot = "";
+
+  res.responseEnd = (body) => {
+    // If body is Buffer, then it is converted to String anyway.
+    res.write(res.head + body + res.foot);
+    res.end();
+  };
+
+  // Server error calling method
+  res.error = (errorCode, extName, stack, ch) => {
+    if (typeof errorCode !== "number") {
+      throw new TypeError("HTTP error code parameter needs to be an integer.");
+    }
+
+    // Handle optional parameters
+    if (extName && typeof extName === "object") {
+      ch = stack;
+      stack = extName;
+      extName = undefined;
+    } else if (
+      typeof extName !== "string" &&
+      extName !== null &&
+      extName !== undefined
+    ) {
+      throw new TypeError("Extension name parameter needs to be a string.");
+    }
+
+    if (
+      stack &&
+      typeof stack === "object" &&
+      Object.prototype.toString.call(stack) !== "[object Error]"
+    ) {
+      ch = stack;
+      stack = undefined;
+    } else if (
+      typeof stack !== "object" &&
+      typeof stack !== "string" &&
+      stack
+    ) {
+      throw new TypeError(
+        "Error stack parameter needs to be either a string or an instance of Error object.",
+      );
+    }
+
+    // Determine error file
+    function getErrorFileName(list, callback, _i) {
+      function medCallback(p) {
+        if (p) callback(p);
+        else {
+          if (errorCode == 404) {
+            fs.access(config.page404, fs.constants.F_OK, function (err) {
+              if (err) {
+                fs.access(
+                  "." + errorCode.toString(),
+                  fs.constants.F_OK,
+                  function (err) {
+                    try {
+                      if (err) {
+                        callback(errorCode.toString() + ".html");
+                      } else {
+                        callback("." + errorCode.toString());
+                      }
+                    } catch (err2) {
+                      res.error(500, err2);
+                    }
+                  },
+                );
+              } else {
+                try {
+                  callback(config.page404);
+                } catch (err2) {
+                  res.error(500, err2);
+                }
+              }
+            });
+          } else {
+            fs.access(
+              "." + errorCode.toString(),
+              fs.constants.F_OK,
+              function (err) {
+                try {
+                  if (err) {
+                    callback(errorCode.toString() + ".html");
+                  } else {
+                    callback("." + errorCode.toString());
+                  }
+                } catch (err2) {
+                  res.error(500, err2);
+                }
+              },
+            );
+          }
+        }
+      }
+
+      if (!_i) _i = 0;
+      if (_i >= list.length) {
+        medCallback(false);
+        return;
+      }
+
+      if (
+        list[_i].scode != errorCode ||
+        !(
+          matchHostname(list[_i].host, req.headers.host) &&
+          ipMatch(list[_i].ip, req.socket ? req.socket.localAddress : undefined)
+        )
+      ) {
+        getErrorFileName(list, callback, _i + 1);
+        return;
+      } else {
+        fs.access(list[_i].path, fs.constants.F_OK, function (err) {
+          if (err) {
+            getErrorFileName(list, callback, _i + 1);
+          } else {
+            medCallback(list[_i].path);
+          }
+        });
+      }
+    }
+
+    getErrorFileName(config.errorPages, function (errorFile) {
+      // Generate error stack if not provided
+      if (Object.prototype.toString.call(stack) === "[object Error]")
+        stack = generateErrorStack(stack);
+      if (stack === undefined)
+        stack = generateErrorStack(new Error("Unknown error"));
+
+      if (errorCode == 500 || errorCode == 502) {
+        logFacilities.errmessage(
+          "There was an error while processing the request!",
+        );
+        logFacilities.errmessage("Stack:");
+        logFacilities.errmessage(stack);
+      }
+
+      // Hide the error stack if specified
+      if (config.stackHidden) stack = "[error stack hidden]";
+
+      // Validate the error code and handle unknown codes
+      if (serverHTTPErrorDescs[errorCode] === undefined) {
+        res.error(501, extName, stack);
+      } else {
+        // Process custom headers if provided
+        let cheaders = { ...config.getCustomHeaders(), ...ch };
+
+        cheaders["Content-Type"] = "text/html; charset=utf-8";
+
+        // Set default Allow header for 405 error if not provided
+        if (errorCode == 405 && !cheaders["Allow"])
+          cheaders["Allow"] = "GET, POST, HEAD, OPTIONS";
+
+        // Read the error file and replace placeholders with error information
+        fs.readFile(errorFile, function (err, data) {
+          try {
+            if (err) throw err;
+            res.writeHead(errorCode, http.STATUS_CODES[errorCode], cheaders);
+            res.responseEnd(
+              data
+                .toString()
+                .replace(
+                  /{errorMessage}/g,
+                  errorCode.toString() +
+                    " " +
+                    http.STATUS_CODES[errorCode]
+                      .replace(/&/g, "&amp;")
+                      .replace(/</g, "&lt;")
+                      .replace(/>/g, "&gt;"),
+                )
+                .replace(/{errorDesc}/g, serverHTTPErrorDescs[errorCode])
+                .replace(
+                  /{stack}/g,
+                  stack
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;")
+                    .replace(/\r\n/g, "<br/>")
+                    .replace(/\n/g, "<br/>")
+                    .replace(/\r/g, "<br/>")
+                    .replace(/ {2}/g, "&nbsp;&nbsp;"),
+                )
+                .replace(
+                  /{path}/g,
+                  req.url
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;"),
+                )
+                .replace(
+                  /{server}/g,
+                  "" +
+                    (
+                      config.generateServerString() +
+                      (!config.exposeModsInErrorPages || extName == undefined
+                        ? ""
+                        : " " + extName)
+                    )
+                      .replace(/&/g, "&amp;")
+                      .replace(/</g, "&lt;")
+                      .replace(/>/g, "&gt;") +
+                    (req.headers.host == undefined || req.isProxy
+                      ? ""
+                      : " on " +
+                        String(req.headers.host)
+                          .replace(/&/g, "&amp;")
+                          .replace(/</g, "&lt;")
+                          .replace(/>/g, "&gt;")),
+                )
+                .replace(
+                  /{contact}/g,
+                  config.serverAdministratorEmail
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;")
+                    .replace(/\./g, "[dot]")
+                    .replace(/@/g, "[at]"),
+                ),
+            ); // Replace placeholders in error response
+          } catch (err) {
+            let additionalError = 500;
+            // Handle additional error cases
+            if (err.code == "ENOENT") {
+              additionalError = 404;
+            } else if (err.code == "ENOTDIR") {
+              additionalError = 404; // Assume that file doesn't exist
+            } else if (err.code == "EACCES") {
+              additionalError = 403;
+            } else if (err.code == "ENAMETOOLONG") {
+              additionalError = 414;
+            } else if (err.code == "EMFILE") {
+              additionalError = 503;
+            } else if (err.code == "ELOOP") {
+              additionalError = 508;
+            }
+
+            res.writeHead(errorCode, http.STATUS_CODES[errorCode], cheaders);
+            res.write(
+              (
+                '<!DOCTYPE html><html><head><title>{errorMessage}</title><meta name="viewport" content="width=device-width, initial-scale=1.0" /><style>html{background-color:#dfffdf;color:#000000;font-family:FreeSans, Helvetica, Tahoma, Verdana, Arial, sans-serif;margin:0.75em}body{background-color:#ffffff;padding:0.5em 0.5em 0.1em;margin:0.5em auto;width:90%;max-width:800px;-webkit-box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15);-moz-box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15);box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15)}h1{text-align:center;font-size:2.25em;margin:0.3em 0 0.5em}code{background-color:#dfffdf;-webkit-box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);-moz-box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);display:block;padding:0.2em;font-family:"DejaVu Sans Mono", "Bitstream Vera Sans Mono", Hack, Menlo, Consolas, Monaco, monospace;font-size:0.85em;margin:auto;width:95%;max-width:600px}table{width:95%;border-collapse:collapse;margin:auto;overflow-wrap:break-word;word-wrap:break-word;word-break:break-all;word-break:break-word;position:relative;z-index:0}table tbody{background-color:#ffffff;color:#000000}table tbody:after{-webkit-box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);-moz-box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);content:\' \';position:absolute;top:0;left:0;right:0;bottom:0;z-index:-1}table img{margin:0;display:inline}th,tr{padding:0.15em;text-align:center}th{background-color:#007000;color:#ffffff}th a{color:#ffffff}td,th{padding:0.225em}td{text-align:left}tr:nth-child(odd){background-color:#dfffdf}hr{color:#ffffff}@media screen and (prefers-color-scheme: dark){html{background-color:#002000;color:#ffffff}body{background-color:#000f00;-webkit-box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15);-moz-box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15);box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15)}code{background-color:#002000;-webkit-box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1);-moz-box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1);box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1)}a{color:#ffffff}a:hover{color:#00ff00}table tbody{background-color:#000f00;color:#ffffff}table tbody:after{-webkit-box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175);-moz-box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175);box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175)}tr:nth-child(odd){background-color:#002000}}</style></head><body><h1>{errorMessage}</h1><p>{errorDesc}</p>' +
+                (additionalError == 404
+                  ? ""
+                  : "<p>Additionally, a {additionalError} error occurred while loading an error page.</p>") +
+                "<p><i>{server}</i></p></body></html>"
+              )
+                .replace(
+                  /{errorMessage}/g,
+                  errorCode.toString() +
+                    " " +
+                    http.STATUS_CODES[errorCode]
+                      .replace(/&/g, "&amp;")
+                      .replace(/</g, "&lt;")
+                      .replace(/>/g, "&gt;"),
+                )
+                .replace(/{errorDesc}/g, serverHTTPErrorDescs[errorCode])
+                .replace(
+                  /{stack}/g,
+                  stack
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;")
+                    .replace(/\r\n/g, "<br/>")
+                    .replace(/\n/g, "<br/>")
+                    .replace(/\r/g, "<br/>")
+                    .replace(/ {2}/g, "&nbsp;&nbsp;"),
+                )
+                .replace(
+                  /{path}/g,
+                  req.url
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;"),
+                )
+                .replace(
+                  /{server}/g,
+                  "" +
+                    (
+                      config.generateServerString() +
+                      (!config.exposeModsInErrorPages || extName == undefined
+                        ? ""
+                        : " " + extName)
+                    )
+                      .replace(/&/g, "&amp;")
+                      .replace(/</g, "&lt;")
+                      .replace(/>/g, "&gt;") +
+                    (req.headers.host == undefined || req.isProxy
+                      ? ""
+                      : " on " +
+                        String(req.headers.host)
+                          .replace(/&/g, "&amp;")
+                          .replace(/</g, "&lt;")
+                          .replace(/>/g, "&gt;")),
+                )
+                .replace(
+                  /{contact}/g,
+                  config.serverAdministratorEmail
+                    .replace(/&/g, "&amp;")
+                    .replace(/</g, "&lt;")
+                    .replace(/>/g, "&gt;")
+                    .replace(/\./g, "[dot]")
+                    .replace(/@/g, "[at]"),
+                )
+                .replace(/{additionalError}/g, additionalError.toString()),
+            ); // Replace placeholders in error response
+            res.end();
+          }
+        });
+      }
+    });
+  };
+
+  // Function to perform HTTP redirection to a specified destination URL
+  res.redirect = (destination, isTemporary, keepMethod, customHeaders) => {
+    // If keepMethod is a object, then save it to customHeaders
+    if (typeof keepMethod == "object") customHeaders = keepMethod;
+
+    // If isTemporary is a object, then save it to customHeaders
+    if (typeof isTemporary == "object") customHeaders = isTemporary;
+
+    // If customHeaders are not provided, get the default custom headers
+    if (customHeaders === undefined) customHeaders = config.getCustomHeaders();
+
+    // Set the "Location" header to the destination URL
+    customHeaders["Location"] = destination;
+
+    // Determine the status code for redirection based on the isTemporary and keepMethod flags
+    const statusCode = keepMethod
+      ? isTemporary
+        ? 307
+        : 308
+      : isTemporary
+        ? 302
+        : 301;
+
+    // Write the response header with the appropriate status code and message
+    res.writeHead(statusCode, http.STATUS_CODES[statusCode], customHeaders);
+
+    // Log the redirection message
+    logFacilities.resmessage("Client redirected to " + destination);
+
+    // End the response
+    res.end();
+
+    // Return from the function
+    return;
+  };
+
+  try {
+    res.head = fs.existsSync("./.head")
+      ? fs.readFileSync("./.head").toString()
+      : fs.existsSync("./head.html")
+        ? fs.readFileSync("./head.html").toString()
+        : ""; // header
+    res.foot = fs.existsSync("./.foot")
+      ? fs.readFileSync("./.foot").toString()
+      : fs.existsSync("./foot.html")
+        ? fs.readFileSync("./foot.html").toString()
+        : ""; // footer
+  } catch (err) {
+    res.error(500, err);
+  }
+
+  // Authenticated user variable
+  req.authUser = null;
+
+  if (req.url == "*") {
+    // Handle "*" URL
+    if (req.method == "OPTIONS") {
+      // Respond with list of methods
+      let hdss = config.getCustomHeaders();
+      hdss["Allow"] = "GET, POST, HEAD, OPTIONS";
+      res.writeHead(204, http.STATUS_CODES[204], hdss);
+      res.end();
+      return;
+    } else {
+      // SVR.JS doesn't understand that request, so throw an 400 error
+      res.error(400);
+      return;
+    }
+  }
+
+  if (req.headers["expect"] && req.headers["expect"] != "100-continue") {
+    // Expectations not met.
+    res.error(417);
+    return;
+  }
+
+  if (req.method == "CONNECT") {
+    // CONNECT requests should be handled in "connect" event.
+    res.error(501);
+    logFacilities.errmessage(
+      "CONNECT requests aren't supported. Your JS runtime probably doesn't support 'connect' handler for HTTP library.",
+    );
+    return;
+  }
+
+  if (!isForwardedValid) {
+    logFacilities.errmessage("X-Forwarded-For header is invalid.");
+    res.error(400);
+    return;
+  }
+
+  try {
+    req.parsedURL = new URL(
+      req.url,
+      "http" +
+        (req.socket.encrypted ? "s" : "") +
+        "://" +
+        (req.headers.host
+          ? req.headers.host
+          : config.domain
+            ? config.domain
+            : "unknown.invalid"),
+    );
+  } catch (err) {
+    res.error(400, err);
+    return;
+  }
+
   let index = 0;
 
   // Call the next middleware function

src/index.js

@@ -279,7 +279,6 @@ try {
 }
 
 let middleware = [
-  require("./middleware/core.js"),
   require("./middleware/urlSanitizer.js"),
   require("./middleware/redirects.js"),
   require("./middleware/blocklist.js"),

src/middleware/core.js

@@ -1,688 +0,0 @@
-const http = require("http");
-const fs = require("fs");
-const net = require("net");
-const generateErrorStack = require("../utils/generateErrorStack.js");
-const generateServerString = require("../utils/generateServerString.js");
-const serverHTTPErrorDescs = require("../res/httpErrorDescriptions.js");
-const fixNodeMojibakeURL = require("../utils/urlMojibakeFixer.js");
-const ipMatch = require("../utils/ipMatch.js");
-const matchHostname = require("../utils/matchHostname.js");
-
-module.exports = (req, res, logFacilities, config, next) => {
-  config.generateServerString = () => {
-    return generateServerString(config.exposeServerVersion);
-  };
-
-  // getCustomHeaders() in SVR.JS 3.x
-  config.getCustomHeaders = () => {
-    let ph = Object.assign(config.customHeaders);
-    if (config.customHeadersVHost) {
-      let vhostP = null;
-      config.customHeadersVHost.every(function (vhost) {
-        if (
-          matchHostname(vhost.host, req.headers.host) &&
-          ipMatch(vhost.ip, req.socket ? req.socket.localAddress : undefined)
-        ) {
-          vhostP = vhost;
-          return false;
-        } else {
-          return true;
-        }
-      });
-      if (vhostP && vhostP.headers) {
-        const phNu = Object.assign(vhostP.headers);
-        Object.keys(phNu).forEach(function (phNuK) {
-          ph[phNuK] = phNu[phNuK];
-        });
-      }
-    }
-    Object.keys(ph).forEach(function (phk) {
-      if (typeof ph[phk] == "string")
-        ph[phk] = ph[phk].replace(/\{path\}/g, req.url);
-    });
-    ph["Server"] = config.generateServerString();
-    return ph;
-  };
-
-  // Estimate fromMain from SVR.JS 3.x
-  let fromMain = !(config.secure && !req.socket.encrypted);
-
-  // Make HTTP/1.x API-based scripts compatible with HTTP/2.0 API
-  if (config.enableHTTP2 == true && req.httpVersion == "2.0") {
-    // Set HTTP/1.x methods (to prevent process warnings)
-    res.writeHeadNodeApi = res.writeHead;
-    res.setHeaderNodeApi = res.setHeader;
-
-    res.writeHead = function (a, b, c) {
-      let table = c;
-      if (typeof b == "object") table = b;
-      if (table == undefined) table = this.tHeaders;
-      if (table == undefined) table = {};
-      table = Object.assign(table);
-      Object.keys(table).forEach(function (key) {
-        const al = key.toLowerCase();
-        if (
-          al == "transfer-encoding" ||
-          al == "connection" ||
-          al == "keep-alive" ||
-          al == "upgrade"
-        )
-          delete table[key];
-      });
-      if (res.stream && res.stream.destroyed) {
-        return false;
-      } else {
-        return res.writeHeadNodeApi(a, table);
-      }
-    };
-    res.setHeader = function (headerName, headerValue) {
-      const al = headerName.toLowerCase();
-      if (
-        al != "transfer-encoding" &&
-        al != "connection" &&
-        al != "keep-alive" &&
-        al != "upgrade"
-      )
-        return res.setHeaderNodeApi(headerName, headerValue);
-      return false;
-    };
-
-    // Set HTTP/1.x headers
-    if (!req.headers.host) req.headers.host = req.headers[":authority"];
-    if (!req.url) req.url = req.headers[":path"];
-    if (!req.protocol) req.protocol = req.headers[":scheme"];
-    if (!req.method) req.method = req.headers[":method"];
-    if (
-      req.headers[":path"] == undefined ||
-      req.headers[":method"] == undefined
-    ) {
-      let err = new Error(
-        'Either ":path" or ":method" pseudoheader is missing.',
-      );
-      if (Buffer.alloc) err.rawPacket = Buffer.alloc(0);
-      if (req.socket && req.socket.server)
-        req.socket.server.emit("clientError", err, req.socket);
-    }
-  }
-
-  /*if (req.headers["x-svr-js-from-main-thread"] == "true" && req.socket && (!req.socket.remoteAddress || req.socket.remoteAddress == "::1" || req.socket.remoteAddress == "::ffff:127.0.0.1" || req.socket.remoteAddress == "127.0.0.1" || req.socket.remoteAddress == "localhost" || req.socket.remoteAddress == host || req.socket.remoteAddress == "::ffff:" + host)) {
-      let headers = config.getCustomHeaders();
-      res.writeHead(204, http.STATUS_CODES[204], headers);
-      res.end();
-      return;
-    }*/
-
-  req.url = fixNodeMojibakeURL(req.url);
-
-  let headWritten = false;
-  let lastStatusCode = null;
-  res.writeHeadNative = res.writeHead;
-  res.writeHead = function (code, codeDescription, headers) {
-    if (
-      !(
-        headWritten &&
-        process.isBun &&
-        code === lastStatusCode &&
-        codeDescription === undefined &&
-        codeDescription === undefined
-      )
-    ) {
-      if (headWritten) {
-        process.emitWarning("res.writeHead called multiple times.", {
-          code: "WARN_SVRJS_MULTIPLE_WRITEHEAD",
-        });
-        return res;
-      } else {
-        headWritten = true;
-      }
-      if (code >= 400 && code <= 599) {
-        if (code >= 400 && code <= 499) process.err4xxcounter++;
-        else if (code >= 500 && code <= 599) process.err5xxcounter++;
-        logFacilities.errmessage(
-          "Server responded with " + code.toString() + " code.",
-        );
-      } else {
-        logFacilities.resmessage(
-          "Server responded with " + code.toString() + " code.",
-        );
-      }
-      if (typeof codeDescription != "string" && http.STATUS_CODES[code]) {
-        if (!headers) headers = codeDescription;
-        codeDescription = http.STATUS_CODES[code];
-      }
-      lastStatusCode = code;
-    }
-    res.writeHeadNative(code, codeDescription, headers);
-  };
-
-  let finished = false;
-  res.on("finish", function () {
-    if (!finished) {
-      finished = true;
-      logFacilities.locmessage("Client disconnected.");
-    }
-  });
-  res.on("close", function () {
-    if (!finished) {
-      finished = true;
-      logFacilities.locmessage("Client disconnected.");
-    }
-  });
-
-  req.isProxy = false;
-  if (req.url[0] != "/" && req.url != "*") req.isProxy = true;
-  logFacilities.locmessage(
-    "Somebody connected to " +
-      (config.secure && fromMain
-        ? (typeof config.sport == "number" ? "port " : "socket ") + config.sport
-        : (typeof config.port == "number" ? "port " : "socket ") +
-          config.port) +
-      "...",
-  );
-
-  if (req.socket == null) {
-    logFacilities.errmessage("Client socket is null!!!");
-    return;
-  }
-
-  // Set up X-Forwarded-For
-  let reqip = req.socket.remoteAddress;
-  let reqport = req.socket.remotePort;
-  let oldip = "";
-  let oldport = "";
-  let isForwardedValid = true;
-  if (config.enableIPSpoofing) {
-    if (req.headers["x-forwarded-for"] != undefined) {
-      let preparedReqIP = req.headers["x-forwarded-for"]
-        .split(",")[0]
-        .replace(/ /g, "");
-      let preparedReqIPvalid = net.isIP(preparedReqIP);
-      if (preparedReqIPvalid) {
-        if (
-          preparedReqIPvalid == 4 &&
-          req.socket.remoteAddress &&
-          req.socket.remoteAddress.indexOf(":") > -1
-        )
-          preparedReqIP = "::ffff:" + preparedReqIP;
-        reqip = preparedReqIP;
-        reqport = null;
-        try {
-          oldport = req.socket.remotePort;
-          oldip = req.socket.remoteAddress;
-          req.socket.realRemotePort = reqport;
-          req.socket.realRemoteAddress = reqip;
-          req.socket.originalRemotePort = oldport;
-          req.socket.originalRemoteAddress = oldip;
-          res.socket.realRemotePort = reqport;
-          res.socket.realRemoteAddress = reqip;
-          res.socket.originalRemotePort = oldport;
-          res.socket.originalRemoteAddress = oldip;
-        } catch (err) {
-          // Address setting failed
-        }
-      } else {
-        isForwardedValid = false;
-      }
-    }
-  }
-
-  process.reqcounter++;
-
-  // Process the Host header
-  let oldHostHeader = req.headers.host;
-  if (typeof req.headers.host == "string") {
-    req.headers.host = req.headers.host.toLowerCase();
-    if (!req.headers.host.match(/^\.+$/))
-      req.headers.host = req.headers.host.replace(/\.$/g, "");
-  }
-
-  logFacilities.reqmessage(
-    "Client " +
-      (!reqip || reqip == ""
-        ? "[unknown client]"
-        : reqip +
-          (reqport && reqport !== 0 && reqport != "" ? ":" + reqport : "")) +
-      " wants " +
-      (req.method == "GET"
-        ? "content in "
-        : req.method == "POST"
-          ? "to post content in "
-          : req.method == "PUT"
-            ? "to add content in "
-            : req.method == "DELETE"
-              ? "to delete content in "
-              : req.method == "PATCH"
-                ? "to patch content in "
-                : "to access content using " + req.method + " method in ") +
-      (req.headers.host == undefined || req.isProxy ? "" : req.headers.host) +
-      req.url,
-  );
-  if (req.headers["user-agent"] != undefined)
-    logFacilities.reqmessage("Client uses " + req.headers["user-agent"]);
-  if (oldHostHeader && oldHostHeader != req.headers.host)
-    logFacilities.resmessage(
-      "Host name rewritten: " + oldHostHeader + " => " + req.headers.host,
-    );
-
-  // Header and footer placeholders
-  res.head = "";
-  res.foot = "";
-
-  res.responseEnd = (body) => {
-    // If body is Buffer, then it is converted to String anyway.
-    res.write(res.head + body + res.foot);
-    res.end();
-  };
-
-  // Server error calling method
-  res.error = (errorCode, extName, stack, ch) => {
-    if (typeof errorCode !== "number") {
-      throw new TypeError("HTTP error code parameter needs to be an integer.");
-    }
-
-    // Handle optional parameters
-    if (extName && typeof extName === "object") {
-      ch = stack;
-      stack = extName;
-      extName = undefined;
-    } else if (
-      typeof extName !== "string" &&
-      extName !== null &&
-      extName !== undefined
-    ) {
-      throw new TypeError("Extension name parameter needs to be a string.");
-    }
-
-    if (
-      stack &&
-      typeof stack === "object" &&
-      Object.prototype.toString.call(stack) !== "[object Error]"
-    ) {
-      ch = stack;
-      stack = undefined;
-    } else if (
-      typeof stack !== "object" &&
-      typeof stack !== "string" &&
-      stack
-    ) {
-      throw new TypeError(
-        "Error stack parameter needs to be either a string or an instance of Error object.",
-      );
-    }
-
-    // Determine error file
-    function getErrorFileName(list, callback, _i) {
-      function medCallback(p) {
-        if (p) callback(p);
-        else {
-          if (errorCode == 404) {
-            fs.access(config.page404, fs.constants.F_OK, function (err) {
-              if (err) {
-                fs.access(
-                  "." + errorCode.toString(),
-                  fs.constants.F_OK,
-                  function (err) {
-                    try {
-                      if (err) {
-                        callback(errorCode.toString() + ".html");
-                      } else {
-                        callback("." + errorCode.toString());
-                      }
-                    } catch (err2) {
-                      res.error(500, err2);
-                    }
-                  },
-                );
-              } else {
-                try {
-                  callback(config.page404);
-                } catch (err2) {
-                  res.error(500, err2);
-                }
-              }
-            });
-          } else {
-            fs.access(
-              "." + errorCode.toString(),
-              fs.constants.F_OK,
-              function (err) {
-                try {
-                  if (err) {
-                    callback(errorCode.toString() + ".html");
-                  } else {
-                    callback("." + errorCode.toString());
-                  }
-                } catch (err2) {
-                  res.error(500, err2);
-                }
-              },
-            );
-          }
-        }
-      }
-
-      if (!_i) _i = 0;
-      if (_i >= list.length) {
-        medCallback(false);
-        return;
-      }
-
-      if (
-        list[_i].scode != errorCode ||
-        !(
-          matchHostname(list[_i].host, req.headers.host) &&
-          ipMatch(list[_i].ip, req.socket ? req.socket.localAddress : undefined)
-        )
-      ) {
-        getErrorFileName(list, callback, _i + 1);
-        return;
-      } else {
-        fs.access(list[_i].path, fs.constants.F_OK, function (err) {
-          if (err) {
-            getErrorFileName(list, callback, _i + 1);
-          } else {
-            medCallback(list[_i].path);
-          }
-        });
-      }
-    }
-
-    getErrorFileName(config.errorPages, function (errorFile) {
-      // Generate error stack if not provided
-      if (Object.prototype.toString.call(stack) === "[object Error]")
-        stack = generateErrorStack(stack);
-      if (stack === undefined)
-        stack = generateErrorStack(new Error("Unknown error"));
-
-      if (errorCode == 500 || errorCode == 502) {
-        logFacilities.errmessage(
-          "There was an error while processing the request!",
-        );
-        logFacilities.errmessage("Stack:");
-        logFacilities.errmessage(stack);
-      }
-
-      // Hide the error stack if specified
-      if (config.stackHidden) stack = "[error stack hidden]";
-
-      // Validate the error code and handle unknown codes
-      if (serverHTTPErrorDescs[errorCode] === undefined) {
-        res.error(501, extName, stack);
-      } else {
-        // Process custom headers if provided
-        let cheaders = { ...config.getCustomHeaders(), ...ch };
-
-        cheaders["Content-Type"] = "text/html; charset=utf-8";
-
-        // Set default Allow header for 405 error if not provided
-        if (errorCode == 405 && !cheaders["Allow"])
-          cheaders["Allow"] = "GET, POST, HEAD, OPTIONS";
-
-        // Read the error file and replace placeholders with error information
-        fs.readFile(errorFile, function (err, data) {
-          try {
-            if (err) throw err;
-            res.writeHead(errorCode, http.STATUS_CODES[errorCode], cheaders);
-            res.responseEnd(
-              data
-                .toString()
-                .replace(
-                  /{errorMessage}/g,
-                  errorCode.toString() +
-                    " " +
-                    http.STATUS_CODES[errorCode]
-                      .replace(/&/g, "&amp;")
-                      .replace(/</g, "&lt;")
-                      .replace(/>/g, "&gt;"),
-                )
-                .replace(/{errorDesc}/g, serverHTTPErrorDescs[errorCode])
-                .replace(
-                  /{stack}/g,
-                  stack
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;")
-                    .replace(/\r\n/g, "<br/>")
-                    .replace(/\n/g, "<br/>")
-                    .replace(/\r/g, "<br/>")
-                    .replace(/ {2}/g, "&nbsp;&nbsp;"),
-                )
-                .replace(
-                  /{path}/g,
-                  req.url
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;"),
-                )
-                .replace(
-                  /{server}/g,
-                  "" +
-                    (
-                      config.generateServerString() +
-                      (!config.exposeModsInErrorPages || extName == undefined
-                        ? ""
-                        : " " + extName)
-                    )
-                      .replace(/&/g, "&amp;")
-                      .replace(/</g, "&lt;")
-                      .replace(/>/g, "&gt;") +
-                    (req.headers.host == undefined || req.isProxy
-                      ? ""
-                      : " on " +
-                        String(req.headers.host)
-                          .replace(/&/g, "&amp;")
-                          .replace(/</g, "&lt;")
-                          .replace(/>/g, "&gt;")),
-                )
-                .replace(
-                  /{contact}/g,
-                  config.serverAdministratorEmail
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;")
-                    .replace(/\./g, "[dot]")
-                    .replace(/@/g, "[at]"),
-                ),
-            ); // Replace placeholders in error response
-          } catch (err) {
-            let additionalError = 500;
-            // Handle additional error cases
-            if (err.code == "ENOENT") {
-              additionalError = 404;
-            } else if (err.code == "ENOTDIR") {
-              additionalError = 404; // Assume that file doesn't exist
-            } else if (err.code == "EACCES") {
-              additionalError = 403;
-            } else if (err.code == "ENAMETOOLONG") {
-              additionalError = 414;
-            } else if (err.code == "EMFILE") {
-              additionalError = 503;
-            } else if (err.code == "ELOOP") {
-              additionalError = 508;
-            }
-
-            res.writeHead(errorCode, http.STATUS_CODES[errorCode], cheaders);
-            res.write(
-              (
-                '<!DOCTYPE html><html><head><title>{errorMessage}</title><meta name="viewport" content="width=device-width, initial-scale=1.0" /><style>html{background-color:#dfffdf;color:#000000;font-family:FreeSans, Helvetica, Tahoma, Verdana, Arial, sans-serif;margin:0.75em}body{background-color:#ffffff;padding:0.5em 0.5em 0.1em;margin:0.5em auto;width:90%;max-width:800px;-webkit-box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15);-moz-box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15);box-shadow:0 5px 10px 0 rgba(0, 0, 0, 0.15)}h1{text-align:center;font-size:2.25em;margin:0.3em 0 0.5em}code{background-color:#dfffdf;-webkit-box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);-moz-box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);box-shadow:0 2px 4px 0 rgba(0, 0, 0, 0.1);display:block;padding:0.2em;font-family:"DejaVu Sans Mono", "Bitstream Vera Sans Mono", Hack, Menlo, Consolas, Monaco, monospace;font-size:0.85em;margin:auto;width:95%;max-width:600px}table{width:95%;border-collapse:collapse;margin:auto;overflow-wrap:break-word;word-wrap:break-word;word-break:break-all;word-break:break-word;position:relative;z-index:0}table tbody{background-color:#ffffff;color:#000000}table tbody:after{-webkit-box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);-moz-box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);box-shadow:0 4px 8px 0 rgba(0, 0, 0, 0.175);content:\' \';position:absolute;top:0;left:0;right:0;bottom:0;z-index:-1}table img{margin:0;display:inline}th,tr{padding:0.15em;text-align:center}th{background-color:#007000;color:#ffffff}th a{color:#ffffff}td,th{padding:0.225em}td{text-align:left}tr:nth-child(odd){background-color:#dfffdf}hr{color:#ffffff}@media screen and (prefers-color-scheme: dark){html{background-color:#002000;color:#ffffff}body{background-color:#000f00;-webkit-box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15);-moz-box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15);box-shadow:0 5px 10px 0 rgba(127, 127, 127, 0.15)}code{background-color:#002000;-webkit-box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1);-moz-box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1);box-shadow:0 2px 4px 0 rgba(127, 127, 127, 0.1)}a{color:#ffffff}a:hover{color:#00ff00}table tbody{background-color:#000f00;color:#ffffff}table tbody:after{-webkit-box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175);-moz-box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175);box-shadow:0 4px 8px 0 rgba(127, 127, 127, 0.175)}tr:nth-child(odd){background-color:#002000}}</style></head><body><h1>{errorMessage}</h1><p>{errorDesc}</p>' +
-                (additionalError == 404
-                  ? ""
-                  : "<p>Additionally, a {additionalError} error occurred while loading an error page.</p>") +
-                "<p><i>{server}</i></p></body></html>"
-              )
-                .replace(
-                  /{errorMessage}/g,
-                  errorCode.toString() +
-                    " " +
-                    http.STATUS_CODES[errorCode]
-                      .replace(/&/g, "&amp;")
-                      .replace(/</g, "&lt;")
-                      .replace(/>/g, "&gt;"),
-                )
-                .replace(/{errorDesc}/g, serverHTTPErrorDescs[errorCode])
-                .replace(
-                  /{stack}/g,
-                  stack
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;")
-                    .replace(/\r\n/g, "<br/>")
-                    .replace(/\n/g, "<br/>")
-                    .replace(/\r/g, "<br/>")
-                    .replace(/ {2}/g, "&nbsp;&nbsp;"),
-                )
-                .replace(
-                  /{path}/g,
-                  req.url
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;"),
-                )
-                .replace(
-                  /{server}/g,
-                  "" +
-                    (
-                      config.generateServerString() +
-                      (!config.exposeModsInErrorPages || extName == undefined
-                        ? ""
-                        : " " + extName)
-                    )
-                      .replace(/&/g, "&amp;")
-                      .replace(/</g, "&lt;")
-                      .replace(/>/g, "&gt;") +
-                    (req.headers.host == undefined || req.isProxy
-                      ? ""
-                      : " on " +
-                        String(req.headers.host)
-                          .replace(/&/g, "&amp;")
-                          .replace(/</g, "&lt;")
-                          .replace(/>/g, "&gt;")),
-                )
-                .replace(
-                  /{contact}/g,
-                  config.serverAdministratorEmail
-                    .replace(/&/g, "&amp;")
-                    .replace(/</g, "&lt;")
-                    .replace(/>/g, "&gt;")
-                    .replace(/\./g, "[dot]")
-                    .replace(/@/g, "[at]"),
-                )
-                .replace(/{additionalError}/g, additionalError.toString()),
-            ); // Replace placeholders in error response
-            res.end();
-          }
-        });
-      }
-    });
-  };
-
-  // Function to perform HTTP redirection to a specified destination URL
-  res.redirect = (destination, isTemporary, keepMethod, customHeaders) => {
-    // If keepMethod is a object, then save it to customHeaders
-    if (typeof keepMethod == "object") customHeaders = keepMethod;
-
-    // If isTemporary is a object, then save it to customHeaders
-    if (typeof isTemporary == "object") customHeaders = isTemporary;
-
-    // If customHeaders are not provided, get the default custom headers
-    if (customHeaders === undefined) customHeaders = config.getCustomHeaders();
-
-    // Set the "Location" header to the destination URL
-    customHeaders["Location"] = destination;
-
-    // Determine the status code for redirection based on the isTemporary and keepMethod flags
-    const statusCode = keepMethod
-      ? isTemporary
-        ? 307
-        : 308
-      : isTemporary
-        ? 302
-        : 301;
-
-    // Write the response header with the appropriate status code and message
-    res.writeHead(statusCode, http.STATUS_CODES[statusCode], customHeaders);
-
-    // Log the redirection message
-    logFacilities.resmessage("Client redirected to " + destination);
-
-    // End the response
-    res.end();
-
-    // Return from the function
-    return;
-  };
-
-  try {
-    res.head = fs.existsSync("./.head")
-      ? fs.readFileSync("./.head").toString()
-      : fs.existsSync("./head.html")
-        ? fs.readFileSync("./head.html").toString()
-        : ""; // header
-    res.foot = fs.existsSync("./.foot")
-      ? fs.readFileSync("./.foot").toString()
-      : fs.existsSync("./foot.html")
-        ? fs.readFileSync("./foot.html").toString()
-        : ""; // footer
-  } catch (err) {
-    res.error(500, err);
-  }
-
-  // Authenticated user variable
-  req.authUser = null;
-
-  if (req.url == "*") {
-    // Handle "*" URL
-    if (req.method == "OPTIONS") {
-      // Respond with list of methods
-      let hdss = config.getCustomHeaders();
-      hdss["Allow"] = "GET, POST, HEAD, OPTIONS";
-      res.writeHead(204, http.STATUS_CODES[204], hdss);
-      res.end();
-      return;
-    } else {
-      // SVR.JS doesn't understand that request, so throw an 400 error
-      res.error(400);
-      return;
-    }
-  }
-
-  if (req.headers["expect"] && req.headers["expect"] != "100-continue") {
-    // Expectations not met.
-    res.error(417);
-    return;
-  }
-
-  if (req.method == "CONNECT") {
-    // CONNECT requests should be handled in "connect" event.
-    res.error(501);
-    logFacilities.errmessage(
-      "CONNECT requests aren't supported. Your JS runtime probably doesn't support 'connect' handler for HTTP library.",
-    );
-    return;
-  }
-
-  if (!isForwardedValid) {
-    logFacilities.errmessage("X-Forwarded-For header is invalid.");
-    res.error(400);
-    return;
-  }
-
-  try {
-    req.parsedURL = new URL(
-      req.url,
-      "http" +
-        (req.socket.encrypted ? "s" : "") +
-        "://" +
-        (req.headers.host
-          ? req.headers.host
-          : config.domain
-            ? config.domain
-            : "unknown.invalid"),
-    );
-  } catch (err) {
-    res.error(400, err);
-    return;
-  }
-
-  next();
-};