src/middleware/defaultHandlerChecks.js

   1 const defaultPageCSS = require("../res/defaultPageCSS.js");
   2 const statusCodes = require("../res/statusCodes.js");
   3 const svrjsInfo = require("../../svrjs.json");
   4 const { name } = svrjsInfo;
   5
   6 module.exports = (req, res, logFacilities, config, next) => {
   7   if (req.isProxy) {
   8     let eheaders = config.getCustomHeaders();
   9     eheaders["Content-Type"] = "text/html";
  10     res.writeHead(501, statusCodes[501], eheaders);
  11     res.write(
  12       `<!DOCTYPE html><html><head><title>Proxy not implemented</title><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><style>${defaultPageCSS}</style></head><body><h1>Proxy not implemented</h1><p>${name
  13         .replace(/&/g, "&amp;")
  14         .replace(/</g, "&lt;")
  15         .replace(
  16           />/g,
  17           "&gt;"
  18         )} doesn't support proxy without proxy mod. If you're administrator of this server, then install this mod in order to use ${name
  19         .replace(/&/g, "&amp;")
  20         .replace(/</g, "&lt;")
  21         .replace(/>/g, "&gt;")} as a proxy.</p><p><i>${config
  22         .generateServerString()
  23         .replace(/&/g, "&amp;")
  24         .replace(/</g, "&lt;")
  25         .replace(/>/g, "&gt;")}</i></p></body></html>`
  26     );
  27     res.end();
  28     logFacilities.errmessage(
  29       `${name} doesn't support proxy without proxy mod.`
  30     );
  31     return;
  32   }
  33
  34   if (req.method == "OPTIONS") {
  35     let hdrs = config.getCustomHeaders();
  36     hdrs["Allow"] = "GET, POST, HEAD, OPTIONS";
  37     res.writeHead(204, statusCodes[204], hdrs);
  38     res.end();
  39     return;
  40   } else if (
  41     req.method != "GET" &&
  42     req.method != "POST" &&
  43     req.method != "HEAD"
  44   ) {
  45     res.error(405);
  46     logFacilities.errmessage("Invalid method: " + req.method);
  47     return;
  48   }
  49
  50   next();
  51 };
  52
  53 module.exports.proxySafe = true;