From c00ac1ff51c795d4d93c32e0a913e2cebf917d0c Mon Sep 17 00:00:00 2001
From: Biswakalyan Bhuyan <biswa@surgot.in>
Date: Thu, 25 Jul 2024 12:09:28 +0530
Subject: added backend and login portal

---
 backend/node_modules/forwarded/index.js | 90 +++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 backend/node_modules/forwarded/index.js

(limited to 'backend/node_modules/forwarded/index.js')

diff --git a/backend/node_modules/forwarded/index.js b/backend/node_modules/forwarded/index.js
new file mode 100644
index 0000000..b2b6bdd
--- /dev/null
+++ b/backend/node_modules/forwarded/index.js
@@ -0,0 +1,90 @@
+/*!
+ * forwarded
+ * Copyright(c) 2014-2017 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = forwarded
+
+/**
+ * Get all addresses in the request, using the `X-Forwarded-For` header.
+ *
+ * @param {object} req
+ * @return {array}
+ * @public
+ */
+
+function forwarded (req) {
+  if (!req) {
+    throw new TypeError('argument req is required')
+  }
+
+  // simple header parsing
+  var proxyAddrs = parse(req.headers['x-forwarded-for'] || '')
+  var socketAddr = getSocketAddr(req)
+  var addrs = [socketAddr].concat(proxyAddrs)
+
+  // return all addresses
+  return addrs
+}
+
+/**
+ * Get the socket address for a request.
+ *
+ * @param {object} req
+ * @return {string}
+ * @private
+ */
+
+function getSocketAddr (req) {
+  return req.socket
+    ? req.socket.remoteAddress
+    : req.connection.remoteAddress
+}
+
+/**
+ * Parse the X-Forwarded-For header.
+ *
+ * @param {string} header
+ * @private
+ */
+
+function parse (header) {
+  var end = header.length
+  var list = []
+  var start = header.length
+
+  // gather addresses, backwards
+  for (var i = header.length - 1; i >= 0; i--) {
+    switch (header.charCodeAt(i)) {
+      case 0x20: /*   */
+        if (start === end) {
+          start = end = i
+        }
+        break
+      case 0x2c: /* , */
+        if (start !== end) {
+          list.push(header.substring(start, end))
+        }
+        start = end = i
+        break
+      default:
+        start = i
+        break
+    }
+  }
+
+  // final address
+  if (start !== end) {
+    list.push(header.substring(start, end))
+  }
+
+  return list
+}
-- 
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