Error log option

.gitignore

@@ -4,4 +4,5 @@
 /config.example.json
 /data
 /test_data
-/git_secret
+/access.log
+/error.log

README.md

@@ -198,6 +198,8 @@ Any URL like `/year/month/day/anything/` will redirect to this article (and link
   the Express view engine used to render pages from templates
 * `access_log` (default: access.log)  
   log file where to save access requests (empty to disable)
+* `error_log` (default: error.log)  
+  log file where to save all server errors (empty to disable)
 * `modules`
    * `rss` (default: true)  
      activate the RSS endpoint and its features

src/app.js

@@ -102,7 +102,7 @@ module.exports = (config) => {
       const end = res.end;
       res.end = (chunk, encoding) => {
         fs.appendFile(config['access_log'],
-          res.statusCode + ' ' + req.method + ' ' + req.url + ' ' + new Date().toUTCString() + ' ' + (req.ips.join(' ') || req.ip) + '\n',
+          `${res.statusCode} ${req.method} ${req.url} ${new Date().toUTCString()} ${req.ips.join(' ') || req.ip}\n`,
           {encoding: 'UTF-8'}, () => {
             res.end = end;
             res.end(chunk, encoding);
@@ -235,10 +235,16 @@ module.exports = (config) => {
     res.status(400).send('bad request');
   });
 
+  //log all server errors
   app.use((err, req, res, next) => {
-    console.log(cons.error, `error when handling ${req.path} request : ${err}`);
+    console.log(cons.error, `error when handling ${req.method} ${req.path} request : ${err}`);
-    console.error(err.stack);
+    if (!config['error_log'])
       next(err);
+    fs.appendFile(config['error_log'],
+      `500 ${req.method} ${req.url} ${new Date().toUTCString()} ${req.ips.join(' ') || req.ip}\n${err.stack}\n`,
+      {encoding: 'UTF-8'}, () => {
+        next(err);
+      });
   });
 
   // must be use in a server.js to start the server

src/config.default.json

@@ -3,6 +3,7 @@
   "data_dir": "data",
   "view_engine": "ejs",
   "access_log": "access.log",
+  "error_log": "error.log",
   "modules": {
     "rss": true,
     "webhook": true,

test/app.test.js

@@ -21,6 +21,7 @@ config['rss']['endpoint'] = '/rsstest';
 config['rss']['length'] = 2;
 config['webhook']['endpoint'] = '/webhooktest';
 config['access_log'] = path.join(dataDir, 'access.log');
+config['error_log'] = path.join(dataDir, 'error.log');
 
 const app = require('../src/app')(config);
 
@@ -36,7 +37,16 @@ afterAll(() => {
   }
 });
 
-describe('Test logging', () => {
+describe('Test request logging', () => {
+  test('test no log', (done) => {
+    const tmp = config['access_log'];
+    config['access_log'] = '';
+    request(app).get('/rsstest').then(() => {
+      config['access_log'] = tmp;
+      expect(fs.existsSync(path.join(dataDir, 'access.log'))).toBe(false);
+      done();
+    });
+  });
   test('test get 200', (done) => {
     request(app).get('/rsstest').then(() => {
       fs.readFile(path.join(dataDir, 'access.log'), {encoding: 'UTF-8'}, (err, data) => {
@@ -69,6 +79,35 @@ describe('Test logging', () => {
   });
 });
 
+describe('Test error logging', () => {
+  test('test no log', (done) => {
+    const tmp = config['home']['hidden'];
+    config['home']['hidden'] = null;
+    const tmp2 = config['errpr_log'];
+    config['error_log'] = '';
+    request(app).get('/somefile.txt').then(() => {
+      config['home']['hidden'] = tmp;
+      config['error_log'] = tmp2;
+      expect(fs.existsSync(path.join(dataDir, 'error.log'))).toBe(false);
+      done();
+    });
+  });
+  test('test null error ', (done) => {
+    const tmp = config['home']['hidden'];
+    config['home']['hidden'] = null;
+    request(app).get('/somefile.txt').then(() => {
+      config['home']['hidden'] = tmp;
+      fs.readFile(path.join(dataDir, 'error.log'), {encoding: 'UTF-8'}, (err, data) => {
+        expect(err).toBeNull();
+        const start = data.split('\n').slice(0, 2).join('\n');
+        const expected = '500 GET /somefile.txt ' + new Date().toUTCString() + ' ::ffff:127.0.0.1\nTypeError: Cannot read property \'includes\' of null';
+        expect(start).toBe(expected);
+        done();
+      });
+    });
+  });
+});
+
 describe('Test root path', () => {
   test('404 no index no error', (done) => {
     request(app).get('/').then((response) => {

test/test_utils.js

@@ -4,12 +4,21 @@ const path = require('path');
 const deleteFolderSync = (dir) => {
   if (!fs.existsSync(dir))
     return;
-  fs.readdirSync(dir, {withFileTypes: true}).forEach((item) => {
+  let items;
+  const deleteItem = (item) => {
     if (item.isDirectory())
       deleteFolderSync(path.join(dir, item.name));
     else
       fs.unlinkSync(path.join(dir, item.name));
-  });
+  };
+  do {
+    items = fs.readdirSync(dir, {withFileTypes: true});
+    try {
+      items.forEach(deleteItem);
+    } catch (e) {
+      console.error(e);
+    }
+  } while (items.length > 0);
   fs.rmdirSync(dir);
 };