From d747ac66e687db828f7dd9d0ff8a99ce1f802698 Mon Sep 17 00:00:00 2001
From: Menci <huanghaorui301@gmail.com>
Date: Wed, 20 Mar 2019 20:17:01 +0800
Subject: [PATCH 1/3] Workaround a race condition in submitting

---
 modules/problem.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/modules/problem.js b/modules/problem.js
index afa41dc..84df7e2 100644
--- a/modules/problem.js
+++ b/modules/problem.js
@@ -683,7 +683,9 @@ app.post('/problem/:id/submit', app.multer.fields([{ name: 'answer', maxCount: 1
             code: formatted
           });
 
-          await formattedCode.save();
+          try {
+            await formattedCode.save();
+          } catch (e) {}
         }
       }
     }

From 3ae5262797efe0ac607bbb712f727072bf744ce6 Mon Sep 17 00:00:00 2001
From: Menci <huanghaorui301@gmail.com>
Date: Wed, 20 Mar 2019 20:21:42 +0800
Subject: [PATCH 2/3] Workaround Sequelize's .save() possibly won't resolve bug

---
 models/common.js |  3 ++-
 utility.js       | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/models/common.js b/models/common.js
index 952e1a1..7e1342f 100644
--- a/models/common.js
+++ b/models/common.js
@@ -34,7 +34,8 @@ class Model {
     for (let key in obj) this.record.set(key, obj[key]);
 
     let isNew = this.record.isNewRecord;
-    await this.record.save();
+
+    await syzoj.utils.withTimeoutRetry(() => this.record.save());
     if (!isNew) return;
 
     await this.reload();
diff --git a/utility.js b/utility.js
index 54eec06..21936c2 100644
--- a/utility.js
+++ b/utility.js
@@ -294,5 +294,18 @@ module.exports = {
   async saveConfig() {
     let fs = require('fs-extra');
     fs.writeFileAsync(syzoj.configDir, JSON.stringify(syzoj.config, null, 2));
+  },
+  withTimeoutRetry(func) {
+    let attemptCount = 0;
+    return new Promise((resolve, reject) => {
+      function attempt() {
+        if (attemptCount++) console.log(`syzoj.utils.withTimeout(): attemptCount = ${attemptCount}`);
+        Promise.method(func)().timeout(5000)
+        .then(resolve)
+        .catch(Promise.TimeoutError, attempt)
+        .catch(reject);
+      }
+      attempt();
+    });
   }
 };

From dd132158f223397e8cf764a2a5a36e9dbddf67c2 Mon Sep 17 00:00:00 2001
From: Menci <huanghaorui301@gmail.com>
Date: Wed, 20 Mar 2019 20:28:00 +0800
Subject: [PATCH 3/3] =?UTF-8?q?=E8=AE=A9=E6=88=91=E5=BA=B7=E5=BA=B7?=
 =?UTF-8?q?=E6=98=AF=E5=93=AA=E4=B8=AA=E5=B0=8F=E5=8F=AF=E7=88=B1=E4=B8=8D?=
 =?UTF-8?q?=E5=A5=BD=E5=A5=BD=E7=9C=8B=E6=95=99=E7=A8=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app.js b/app.js
index 01c6dcf..a8eb5bd 100644
--- a/app.js
+++ b/app.js
@@ -22,6 +22,14 @@ global.syzoj = {
     console.log(obj);
   },
   async run() {
+    // Check config
+    if (syzoj.config.session_secret === '@SESSION_SECRET@'
+     || syzoj.config.email_jwt_secret === '@EMAIL_JWT_SECRET@'
+     || syzoj.config.db.password === '@DATABASE_PASSWORD@') {
+      console.log('Please generate and fill the secrets in config!');
+      process.exit();
+    }
+
     let Express = require('express');
     global.app = Express();