Backend half

2025-07-11 19:56:28 +02:00
parent fa868e7c1d
commit 8600fa7c1d
19426 changed files with 3750448 additions and 8108 deletions
@@ -17,12 +17,20 @@ var escapeHtml = require('escape-html')
 var onFinished = require('on-finished')
 var parseUrl = require('parseurl')
 var statuses = require('statuses')
+var unpipe = require('unpipe')

 /**
 * Module variables.
 * @private
 */

+var DOUBLE_SPACE_REGEXP = /\x20{2}/g
+var NEWLINE_REGEXP = /\n/g
+
+/* istanbul ignore next */
+var defer = typeof setImmediate === 'function'
+  ? setImmediate
+  : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
 var isFinished = onFinished.isFinished

 /**
@@ -34,8 +42,8 @@ var isFinished = onFinished.isFinished

 function createHtmlDocument (message) {
  var body = escapeHtml(message)
-    .replaceAll('\n', '<br>')
-    .replaceAll('  ', ' &nbsp;')
+    .replace(NEWLINE_REGEXP, '<br>')
+    .replace(DOUBLE_SPACE_REGEXP, ' &nbsp;')

  return '<!DOCTYPE html>\n' +
    '<html lang="en">\n' +
@@ -81,7 +89,7 @@ function finalhandler (req, res, options) {
    var status

    // ignore 404 on in-flight response
-    if (!err && res.headersSent) {
+    if (!err && headersSent(res)) {
      debug('cannot 404 after headers sent')
      return
    }
@@ -111,11 +119,11 @@ function finalhandler (req, res, options) {

    // schedule onerror callback
    if (err && onerror) {
-      setImmediate(onerror, err, req, res)
+      defer(onerror, err, req, res)
    }

    // cannot actually respond
-    if (res.headersSent) {
+    if (headersSent(res)) {
      debug('cannot %d after headers sent', status)
      if (req.socket) {
        req.socket.destroy()
@@ -141,7 +149,15 @@ function getErrorHeaders (err) {
    return undefined
  }

-  return { ...err.headers }
+  var headers = Object.create(null)
+  var keys = Object.keys(err.headers)
+
+  for (var i = 0; i < keys.length; i++) {
+    var key = keys[i]
+    headers[key] = err.headers[key]
+  }
+
+  return headers
 }

 /**
@@ -230,6 +246,20 @@ function getResponseStatusCode (res) {
  return status
 }

+/**
+ * Determine if the response headers have been sent.
+ *
+ * @param {object} res
+ * @returns {boolean}
+ * @private
+ */
+
+function headersSent (res) {
+  return typeof res.headersSent !== 'boolean'
+    ? Boolean(res._header)
+    : res.headersSent
+}
+
 /**
 * Send response.
 *
@@ -259,9 +289,7 @@ function send (req, res, status, headers, message) {
    res.removeHeader('Content-Range')

    // response headers
-    for (const [key, value] of Object.entries(headers ?? {})) {
-      res.setHeader(key, value)
-    }
+    setHeaders(res, headers)

    // security headers
    res.setHeader('Content-Security-Policy', "default-src 'none'")
@@ -285,9 +313,29 @@ function send (req, res, status, headers, message) {
  }

  // unpipe everything from the request
-  req.unpipe()
+  unpipe(req)

  // flush the request
  onFinished(req, write)
  req.resume()
 }
+
+/**
+ * Set response headers from an object.
+ *
+ * @param {OutgoingMessage} res
+ * @param {object} headers
+ * @private
+ */
+
+function setHeaders (res, headers) {
+  if (!headers) {
+    return
+  }
+
+  var keys = Object.keys(headers)
+  for (var i = 0; i < keys.length; i++) {
+    var key = keys[i]
+    res.setHeader(key, headers[key])
+  }
+}