Add content purge filter

* This filter can be added in case ALL content in a certain
time range needs to be purged.
* Fixes CI problems

Author: Petr Pchelko

lib/purge_content.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const mwUtil = require('./mwUtil');
+
+module.exports = (hyper, req, next, options) => {
+    const startTime = Date.parse(options.start_time);
+    const endTime = Date.parse(options.end_time);
+
+    return next(hyper, req)
+    .then((res) => {
+        if (!startTime || !endTime) {
+            return res;
+        }
+
+        const contentTimestamp = mwUtil.extractDateFromEtag(res.headers.etag);
+        if (!contentTimestamp || contentTimestamp < startTime || contentTimestamp > endTime) {
+            return res;
+        }
+
+        if (mwUtil.isNoCacheRequest(req)) {
+            return res;
+        }
+
+        req.headers['cache-control'] = 'no-cache';
+        return next(hyper, req);
+    });
+};

package.json

@@ -56,6 +56,7 @@
     "eslint-plugin-jsdoc": "^20.4.0",
     "eslint-plugin-json": "^1.4.0",
     "js-yaml": "^3.13.1",
+    "jsonc-parser": "3.2.0",
     "mocha": "^6.2.3",
     "mocha-lcov-reporter": "^1.3.0",
     "mocha.parallel": "^0.15.6",

test/features/pagecontent/language_variants.js

@@ -158,7 +158,7 @@ describe('Language variants', function() {
             assert.deepEqual(res.headers['content-language'], 'de');
             assert.deepEqual(res.headers['x-restbase-sunset'] || null, 'true');
             assert.checkString(res.headers.etag, /^"\d+\/[a-f0-9-]+"$/);
-            assert.deepEqual(res.body.extract, 'Das ist eine testseite');
+            assert.deepEqual(res.body.extract, 'Das ist eine testseite!');
         })
     });