Fix http or database error on long code or compiler output

app.js

@@ -49,7 +49,8 @@ global.syzoj = {
     // Use body parser
     let bodyParser = require('body-parser');
     app.use(bodyParser.urlencoded({
-      extended: true
+      extended: true,
+      limit: '10mb'
     }));
     app.use(bodyParser.json());
 

models/judge_state.js

@@ -27,12 +27,12 @@ let Problem = syzoj.model('problem');
 
 let model = db.define('judge_state', {
   id: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true },
-  code: { type: Sequelize.TEXT },
+  code: { type: Sequelize.TEXT('medium') },
   language: { type: Sequelize.STRING(20) },
 
   status: { type: Sequelize.STRING(50) },
   score: { type: Sequelize.INTEGER },
-  result: { type: Sequelize.TEXT, json: true },
+  result: { type: Sequelize.TEXT('medium'), json: true },
 
   user_id: {
     type: Sequelize.INTEGER,