Release v2.15.4

src/web/middleware/error-page.js

@@ -0,0 +1,48 @@
+function wantsHtmlErrorPage(req, res) {
+  const isXhr = String(req.get && req.get('X-Requested-With') || '').toLowerCase() === 'xmlhttprequest';
+  const requestPath = String(req.originalUrl || req.path || '');
+  const acceptsHtml = !req.accepts || req.accepts('html');
+  const contentType = String(res.get && res.get('Content-Type') || '').toLowerCase();
+
+  return !isXhr && requestPath.indexOf('/api/') !== 0 && acceptsHtml && (!contentType || contentType.indexOf('text/html') === 0);
+}
+
+function createErrorPage(pages, req, statusCode, message) {
+  const isServerError = statusCode >= 500;
+  return pages.renderErrorPage({
+    statusCode: statusCode,
+    message: isServerError ? '' : String(message || ''),
+    detail: isServerError ? 'The server could not complete the request.' : '',
+    backUrl: req.currentUser ? '/dashboard' : '/login',
+    backLabel: req.currentUser ? 'Back to dashboard' : 'Sign in'
+  }, req.currentUser);
+}
+
+module.exports = function registerErrorPageMiddleware(app, pages) {
+  app.use(function (req, res, next) {
+    const send = res.send;
+    const sendStatus = res.sendStatus;
+
+    res.send = function (body) {
+      const statusCode = Number(res.statusCode) || 200;
+      const isHtml = typeof body === 'string' && /^\s*</.test(body);
+
+      if (statusCode >= 400 && statusCode < 600 && !isHtml && wantsHtmlErrorPage(req, res)) {
+        return send.call(res, createErrorPage(pages, req, statusCode, body));
+      }
+
+      return send.apply(res, arguments);
+    };
+
+    res.sendStatus = function (statusCode) {
+      if (statusCode >= 400 && statusCode < 600 && wantsHtmlErrorPage(req, res)) {
+        res.statusCode = statusCode;
+        return res.send(createErrorPage(pages, req, statusCode));
+      }
+
+      return sendStatus.call(res, statusCode);
+    };
+
+    next();
+  });
+};