我是node.js中的新开发人员,我想编写一个小lambda函数(在node.js中),将pdf文件(从硬盘驱动器)上传到亚马逊S3桶。
这是我的代码:
// dependencies
var util = require('util');
var fs = require('fs');
exports.handler = function (req, res) {
var file = req.files.file;
fs.readFile("C:\Users\zack\Downloads\test.pdf", function (err, data) {
if (err) throw err; // Something went wrong!
var s3bucket = new AWS.S3({params: {Bucket: 'myBucket3'}});
s3bucket.createBucket(function () {
var params = {
Key: file.originalFilename, //file.name doesn't exist as a property
Body: data
};
s3bucket.upload(params, function (err, data) {
// Whether there is an error or not, delete the temp file
fs.unlink("C:\Users\zack\Downloads\test.pdf", function (err) {
if (err) {
console.error(err);
}
console.log('Temp File Delete');
});
console.log("PRINT FILE:", file);
if (err) {
console.log('ERROR MSG: ', err);
res.status(500).send(err);
} else {
console.log('Successfully uploaded data');
res.status(200).end();
}
});
});
});
};
lambda函数向我展示了此错误消息:
"errorMessage": "RequestId: 05024c81-f44b-11e6-a45e-57b13036ad96 Process exited before completing request"
和CloudWatch:
START RequestId: e66a7653-f44b-11e6-8b1a-c511605a533b Version: $LATEST
2017-02-16T13:29:11.133Z e66a7653-f44b-11e6-8b1a-c511605a533b TypeError: Cannot read property 'file' of undefined
at exports.handler (/var/task/invoices3/invoices3.js:17:25)
END RequestId: e66a7653-f44b-11e6-8b1a-c511605a533b
REPORT RequestId: e66a7653-f44b-11e6-8b1a-c511605a533b Duration: 27.82 ms Billed Duration: 100 ms Memory Size: 1024 MB Max Memory Used: 23 MB
RequestId: e66a7653-f44b-11e6-8b1a-c511605a533b Process exited before completing request
你能告诉我问题在哪里吗?我根本不擅长node.js。
预先感谢您!
完成请求之前已退出过程
您正在收到此消息,因为您永远不会通知Lambda该功能已完成。完成后,您需要调用context.succeed()
函数,或更新代码以使用较新的callback()
方法,并在完成后调用。