我在 Facebook 上有一个 Node.js Heroku 应用程序，并且我不断在日志中发现以下错误（当我实际尝试访问我的应用程序时出现一般应用程序错误）：
2013-03-27T12:58:54+00:00 heroku[web.1]: Starting process with command `node web
.js`
2013-03-27T12:58:55+00:00 app[web.1]: info: socket.io started
2013-03-27T12:58:55+00:00 app[web.1]: Listening on 6925
2013-03-27T12:58:56+00:00 heroku[web.1]: State changed from starting to up
2013-03-27T13:00:40+00:00 app[web.1]: ^
2013-03-27T13:00:40+00:00 app[web.1]: undefined:1
2013-03-27T13:00:40+00:00 app[web.1]:
2013-03-27T13:00:40+00:00 app[web.1]: SyntaxError: Failed to parse JSON body: Un
expected token o
2013-03-27T13:00:40+00:00 app[web.1]: at Object.parse (native)
2013-03-27T13:00:40+00:00 app[web.1]: at EventEmitter.emit (events.js:99:17)
2013-03-27T13:00:40+00:00 app[web.1]: SyntaxError: Unexpected token S
2013-03-27T13:00:40+00:00 app[web.1]: at EventEmitter.mixin._fireError (/app
/node_modules/faceplate/node_modules/restler/lib/restler.js:192:10)
2013-03-27T13:00:40+00:00 app[web.1]: at IncomingMessage.parsers.json (/app/
node_modules/faceplate/node_modules/restler/lib/restler.js:367:9)
2013-03-27T13:00:40+00:00 app[web.1]: at EventEmitter.FaceplateSession.get (
/app/node_modules/faceplate/index.js:121:25)
2013-03-27T13:00:40+00:00 app[web.1]: at mixin._responseHandler (/app/node_m
odules/faceplate/node_modules/restler/lib/restler.js:142:20)
2013-03-27T13:00:40+00:00 app[web.1]: at EventEmitter.mixin._encode (/app/no
de_modules/faceplate/node_modules/restler/lib/restler.js:184:29)
2013-03-27T13:00:40+00:00 app[web.1]: at IncomingMessage.parsers.auto (/app/
node_modules/faceplate/node_modules/restler/lib/restler.js:356:21)
2013-03-27T13:00:40+00:00 app[web.1]: at mixin._responseHandler (/app/node_m
odules/faceplate/node_modules/restler/lib/restler.js:140:16)
2013-03-27T13:00:40+00:00 app[web.1]: at EventEmitter.mixin._decode (/app/no
de_modules/faceplate/node_modules/restler/lib/restler.js:156:7)
2013-03-27T13:00:41+00:00 heroku[web.1]: Process exited with status 1
2013-03-27T13:00:41+00:00 heroku[web.1]: State changed from up to crashed
在我的服务器代码中，我使用的是JSON.stringify，例如从查询返回到 Postgres 数据库的答案console.log(data + ': is in the tags table, with tag_id=' + JSON.stringify(result));在哪里。result但是，我从不使用JSON.parse，所以这个错误有点令人困惑，直到今天我也从未遇到过这个错误（我的应用程序在周一运行良好）。
同样令人困惑的是，如果我注释掉这些JSON.stringify调用，我仍然会收到错误消息，因此非常感谢任何想法！
根据https://github.com/heroku/faceplate/issues/26，我对我的代码进行了以下更改：
function handle_facebook_request(req, res) {
// if the user is logged in
if (req.facebook.token) {
async.parallel([
function(cb) {
// query 4 friends and send them to the socket for this socket id
req.facebook.get('/me/friends', { limit: 4 }, function(friends) {
req.friends = JSON.parse(JSON.stringify(friends));
cb();
});
},
function(cb) {
// query 16 photos and send them to the socket for this socket id
req.facebook.get('/me/photos', { limit: 16 }, function(photos) {
req.photos = JSON.parse(JSON.stringify(photos));
cb();
});
},
function(cb) {
// query 4 likes and send them to the socket for this socket id
req.facebook.get('/me/likes', { limit: 4 }, function(likes) {
req.likes = JSON.parse(JSON.stringify(likes));
cb();
});
},
function(cb) {
// use fql to get a list of my friends that are using this app
req.facebook.fql('SELECT uid, name, is_app_user, pic_square FROM user WHERE uid in (SELECT uid2 FROM friend WHERE uid1 = me()) AND is_app_user = 1', function(result) {
req.friends_using_app = JSON.parse(JSON.stringify(result));
cb();
});
}
], function() {
render_page(req, res);
});
} else {
render_page(req, res);
}
}
req.????带有eg的每一行req.friends过去就像req.friends = friends;ie 我添加了JSON.parse和JSON.stringify调用一样，没有任何改变。