Try to reduce the extra crap logged when a db query fails

src/_gen_cookies.js

@@ -0,0 +1,51 @@
+const fs = require('fs');
+require('./config').load('config.yaml');
+const session = require('./session');
+
+const users = String(fs.readFileSync('/home/calvin/tmp/cytube_startup.txt'))
+        .split('\n')
+        .filter(ln => /logged in as/.test(ln))
+        .map(ln => {
+            const m = ln.match(/(\S+) logged in as (\S+)/);
+            return { ip: m[1], name: m[2] };
+        });
+
+const ip2chan = new Map();
+
+String(fs.readFileSync('/home/calvin/tmp/cytube_startup.txt'))
+        .split('\n')
+        .filter(ln => /joined/.test(ln))
+        .map(ln => {
+            const m = ln.match(/(\S+) joined (\S+)/);
+            ip2chan.set(m[1], m[2]);
+        });
+
+const db = require('./database');
+db.init();
+
+function next() {
+    if (!users.length) return;
+
+    const { ip, name } = users.shift();
+    db.users.getUser(name, (err, u) => {
+        if (err === 'User does not exist') {
+            process.nextTick(next);
+            return;
+        }
+
+        if (err) throw err;
+
+        session.genSession(u, Date.now() + 24 * 3600 * 1000, (err, s) => {
+            if (err) throw err;
+
+            if (ip2chan.has(ip)) {
+                //s = require('cookie-signature').sign(s, 'change-me');
+                console.log(`${ip}\t${name}\t${s}\t${ip2chan.get(ip)}`);
+            }
+
+            process.nextTick(next);
+        });
+    });
+}
+
+next();

src/database.js

@@ -137,7 +137,25 @@ module.exports.query = function (query, sub, callback) {
             process.nextTick(callback, null, res[0]);
         }).catch(error => {
             queryErrorCount.inc(1);
-            LOGGER.error('Legacy DB query failed.  Query: %s, Substitutions: %j, Error: %s', query, sub, error);
+
+            let subs = JSON.stringify(sub);
+            if (subs.length > 100) {
+                subs = subs.substring(0, 100) + '...';
+            }
+
+            // Attempt to strip off the beginning of the message which
+            // contains the entire substituted SQL query (followed by an
+            // error code)
+            // Thanks MySQL/MariaDB...
+            error.message = error.message.replace(/^.* - ER/, 'ER');
+
+            LOGGER.error(
+                'Legacy DB query failed.  Query: %s, Substitutions: %s, ' +
+                'Error: %s',
+                query,
+                subs,
+                error
+            );
             process.nextTick(callback, 'Database failure', null);
         }).finally(() => {
             end();