Question

尝试插入我的数据库时，我遇到了令人讨厌的h12（超时错误）。

2017-01-25T00:22:24.764591+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=POST path="/api" host=kujaflow.herokuapp.com request_id=fb69dfdf-12ef-4dc8-8feb-45bef0c26746 fwd="71.125.214.77" dyno=web.1 connect=0ms service=30005ms status=503 bytes=0

我不知道为什么会这样。我收集的节点代码看起来不错。我已经删除了用户/通行证信息....

var express = require('express');
var pg = require('pg');

var dbuser = 'xxxxxxxxx';
var dbpassword = 'xxxxxxxxx';
var dbname = 'xxxxxxxxx';
var dbhost = 'xxxxxxxxx';
var dbport = 5432;

var dbconnect = {
    user: dbuser, 
    password: dbpassword,
    host: dbhost,
    database: dbname, 
    port: dbport
};

var router = express.Router();


/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});


/* api */
router.post('/api', function(req, res, next) {

    var latitude = req.body.location.coords.latitude;
    // console.log("latitude: " + latitude);
    var longitude = req.body.location.coords.longitude;
    var heading = req.body.location.coords.heading;
    var timestamp = req.body.location.timestamp;
    var uuid = req.body.location.uuid;
    var is_moving = req.body.location.is_moving;

    pg.connect(dbconnect, function(err, client, done) {

        client.query('INSERT INTO kujadata (latitude, longitude) VALUES ($1, $2);',[latitude, longitude], function (err, result) {
            client.end();
        });

    });

});


router.get('/api', function(req, res, next) {
  res.render('index', { title: 'API' });
});

module.exports = router;

任何想法都会受到赞赏。

Answer 1

啊，是的，这里的问题是你没有正确'结束'你的/api路线。当您使用express时，您需要明确地向客户发送响应。

以下是如何重写它：

router.post('/api', function(req, res, next) {

  var latitude = req.body.location.coords.latitude;
  var longitude = req.body.location.coords.longitude;
  var heading = req.body.location.coords.heading;
  var timestamp = req.body.location.timestamp;
  var uuid = req.body.location.uuid;
  var is_moving = req.body.location.is_moving;

  pg.connect(dbconnect, function(err, client, done) {
    client.query('INSERT INTO kujadata (latitude, longitude) VALUES ($1, $2);', [latitude, longitude], function (err, result) {
      client.end();
      return res.end();
    });
  });

});

注意显式调用res.end()？这就是说明了“嘿，请求已经完成，告诉客户我们已经通过！”

你的Heroku日志显示30秒超时的原因是因为你的请求从未“结束”，如果你的请求在30秒内没有完成，Heroku将自动返回503。

Heroku h12 PG / Node.js超时错误

1 个答案: