Catch express bodyParser错误 [英] Catch express bodyParser error
问题描述
这是我有的,它的作品:
app.use(express.bodyParser());
app.use(function(error,req,res,next){
// Catch bodyParser error
if(error.message ===invalid json){
sendError(res,myCustomErrorMessage);
} else {
next();
}
});
但这似乎对我来说是一个非常丑陋的方法,因为我正在比较可能会改变的错误信息未来快递版本。有没有其他方法可以捕捉bodyParser()错误?
编辑:
这是请求时的错误body有一个无效的json:
{
stack:'错误:在Object.exports上无效json\\\
。错误(< path> /node_modules/express/node_modules/connect/lib/utils.js:55:13)\\\
IncomingMessage。< anonymous> (< path> /node_modules/express/node_modules/connect/lib/middleware/json.js:74:71)\\\
在_coming_readable的IncomingMessage.EventEmitter.emit(events.js:92:17)\\\
。 js:872:14\\\
at process._tickDomainCallback(node.js:459:13)',
arguments:undefined,
type:undefined,
message:'invalid json'
状态:400
}
漂亮的打印堆栈:
错误:Object.exports.error(< path> / node_modules / express / node_modules / connect / lib / utils)中的json
无效.js:55:13)
在IncomingMessage。< anonymous> (< path> /node_modules/express/node_modules/connect/lib/middleware/json.js:74:71)
在IncomingMessage.EventEmitter.emit(events.js:92:17)
at _stream_readable.js:872:14
at process._tickDomainCallback(node.js:459:13)
确定,发现:
bodyParser()是json(),urlencoded()和multipart ()。我只需要调用json(),捕获错误并调用urlencoded()和multipart()。
app.use(express.json() );
app.use(function(error,req,res,next){
// Catch json error
sendError(res,myCustomErrorMessage);
});
app.use(express.urlencoded());
app.use(express.multipart());
I want to catch the error from the bodyParser() middleware when I send a json object and it is invalid because I want to send a custom response instead of a generic 400 error.
This is what I have and it works:
app.use (express.bodyParser ());
app.use (function (error, req, res, next){
//Catch bodyParser error
if (error.message === "invalid json"){
sendError (res, myCustomErrorMessage);
}else{
next ();
}
});
But this seems to me a very ugly approach because I'm comparing the error message which could change in future express versions. There's any other way to catch bodyParser() errors?
EDIT:
This is the error when the request body has an invalid json:
{
stack: 'Error: invalid json\n at Object.exports.error (<path>/node_modules/express/node_modules/connect/lib/utils.js:55:13)\n at IncomingMessage.<anonymous> (<path>/node_modules/express/node_modules/connect/lib/middleware/json.js:74:71)\n at IncomingMessage.EventEmitter.emit (events.js:92:17)\n at _stream_readable.js:872:14\n at process._tickDomainCallback (node.js:459:13)',
arguments: undefined,
type: undefined,
message: 'invalid json',
status: 400
}
Pretty printed stack:
Error: invalid json
at Object.exports.error (<path>/node_modules/express/node_modules/connect/lib/utils.js:55:13)
at IncomingMessage.<anonymous> (<path>/node_modules/express/node_modules/connect/lib/middleware/json.js:74:71)
at IncomingMessage.EventEmitter.emit (events.js:92:17)
at _stream_readable.js:872:14
at process._tickDomainCallback (node.js:459:13)
Ok, found it:
bodyParser() is a convenience function for json(), urlencoded() and multipart(). I just need to call to json(), catch the error and call to urlencoded() and multipart().
app.use (express.json ());
app.use (function (error, req, res, next){
//Catch json error
sendError (res, myCustomErrorMessage);
});
app.use (express.urlencoded ());
app.use (express.multipart ());
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