我正在使用 Node.js 构建服务器。由于多种原因，我无法从客户端（使用应用程序或邮递员）触发有效请求。但我可以在服务器端注销数据。目前，一条路线有问题并返回“错误 400：错误请求”。我怎样才能找出原因？
这是我的路线（它使用Now Serverless 功能）：
const route = ({ request, response }) => {
if (!response.headersSent) {
response.locals
.dispatch(postIssueToken(request.body))
.then(body => response.status(201).send(body))
.catch(err => handleError(response, err));
}
console.log('response', response);
console.log('response.body', response.body);
return { request, response };
};
我尝试注销响应，但上面有数百个键，我找不到content. 例如response.body是undefined.
如何找出 400 错误的原因？我认为在某处的响应中必须有一条消息或某些东西？
为了完成，这里是完整的回应：
response ServerResponse {
_events: [Object: null prototype] {
finish: [ [Function: bound resOnFinish], [Function], [AsyncFunction] ]
},
_eventsCount: 1,
_maxListeners: undefined,
outputData: [],
outputSize: 0,
writable: true,
_last: true,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: true,
sendDate: true,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
_contentLength: 171,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: Socket {
connecting: false,
_hadError: false,
_parent: null,
_host: null,
_readableState: ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: BufferList { head: null, tail: null, length: 0 },
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
paused: false,
emitClose: false,
autoDestroy: false,
destroyed: false,
defaultEncoding: 'utf8',
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null
},
readable: true,
_events: [Object: null prototype] {
end: [Array],
timeout: [Function: socketOnTimeout],
data: [Function: bound socketOnData],
error: [Function: socketOnError],
close: [Array],
drain: [Function: bound socketOnDrain],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause]
},
_eventsCount: 8,
_maxListeners: undefined,
_writableState: WritableState {
objectMode: false,
highWaterMark: 16384,
finalCalled: false,
needDrain: false,
ending: false,
ended: false,
finished: false,
destroyed: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function: bound onwrite],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 3,
prefinished: false,
errorEmitted: false,
emitClose: false,
autoDestroy: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object]
},
writable: true,
allowHalfOpen: true,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [TCP],
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 0,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '4:127.0.0.1:0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 11
},
_server: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [TCP],
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 0,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '4:127.0.0.1:0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 11
},
parser: HTTPParser {
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: bound onParserExecute],
_headers: [],
_url: '',
socket: [Circular],
incoming: [IncomingMessage],
outgoing: null,
maxHeaderPairs: 2000,
_consumed: true,
onIncoming: [Function: bound parserOnIncoming],
parsingHeadersStart: 0
},
on: [Function: socketListenerWrap],
addListener: [Function: socketListenerWrap],
prependListener: [Function: socketListenerWrap],
_paused: false,
_httpMessage: [Circular],
[Symbol(asyncId)]: 110,
[Symbol(kHandle)]: TCP {
reading: true,
onconnection: null,
_consumed: true,
[Symbol(owner)]: [Circular]
},
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0
},
connection: Socket {
connecting: false,
_hadError: false,
_parent: null,
_host: null,
_readableState: ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: BufferList { head: null, tail: null, length: 0 },
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
paused: false,
emitClose: false,
autoDestroy: false,
destroyed: false,
defaultEncoding: 'utf8',
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null
},
readable: true,
_events: [Object: null prototype] {
end: [Array],
timeout: [Function: socketOnTimeout],
data: [Function: bound socketOnData],
error: [Function: socketOnError],
close: [Array],
drain: [Function: bound socketOnDrain],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause]
},
_eventsCount: 8,
_maxListeners: undefined,
_writableState: WritableState {
objectMode: false,
highWaterMark: 16384,
finalCalled: false,
needDrain: false,
ending: false,
ended: false,
finished: false,
destroyed: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function: bound onwrite],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 3,
prefinished: false,
errorEmitted: false,
emitClose: false,
autoDestroy: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object]
},
writable: true,
allowHalfOpen: true,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [TCP],
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 0,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '4:127.0.0.1:0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 11
},
_server: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [TCP],
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 0,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '4:127.0.0.1:0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 11
},
parser: HTTPParser {
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: bound onParserExecute],
_headers: [],
_url: '',
socket: [Circular],
incoming: [IncomingMessage],
outgoing: null,
maxHeaderPairs: 2000,
_consumed: true,
onIncoming: [Function: bound parserOnIncoming],
parsingHeadersStart: 0
},
on: [Function: socketListenerWrap],
addListener: [Function: socketListenerWrap],
prependListener: [Function: socketListenerWrap],
_paused: false,
_httpMessage: [Circular],
[Symbol(asyncId)]: 110,
[Symbol(kHandle)]: TCP {
reading: true,
onconnection: null,
_consumed: true,
[Symbol(owner)]: [Circular]
},
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0
},
_header: 'HTTP/1.1 400 Bad Request\r\n' +
'content-type: application/json; charset=utf-8\r\n' +
'content-length: 171\r\n' +
'etag: W/"ab-khiRb+G+3bll2jfE5KBPWTiybSE"\r\n' +
'Date: Fri, 22 Nov 2019 09:58:51 GMT\r\n' +
'Connection: close\r\n' +
'\r\n',
_onPendingData: [Function: bound updateOutgoingData],
_sent100: false,
_expect_continue: false,
status: [Function],
send: [Function],
json: [Function],
locals: {
get: [Function: get],
db: {
admin: [FirebaseNamespace],
database: [Database],
firestore: [Firestore],
app: [FirebaseApp]
},
dispatch: [AsyncFunction]
},
statusCode: 400,
statusMessage: 'Bad Request',
[Symbol(kNeedDrain)]: false,
[Symbol(isCorked)]: false,
[Symbol(kOutHeaders)]: [Object: null prototype] {
'content-type': [ 'content-type', 'application/json; charset=utf-8' ],
'content-length': [ 'content-length', 171 ],
etag: [ 'etag', 'W/"ab-khiRb+G+3bll2jfE5KBPWTiybSE"' ]
}
}