我正在学习编码和NodeJS。有一件事我一直被卡住了，那就是试图学习响应对象。它是巨大的，当我 console.log()或 console.dir()它时，我无法消化所有的信息。
有一个工具非常方便，那就是Chrome JSON查看器扩展器。还有这个 jsonviewer.stack.hu 做了同样的事情，允许你发布JSON对象，并提供一个可读的对象视图。
不幸的是，它不接受常规对象（从我的CLI复制和粘贴的对象）。我试过在对象上使用JSON.stringfy()，但这个方法会剥离原始对象上90%的属性。
有没有一种简单的解决方案，可以查看CLI记录的对象，并能折叠和展开属性？
该对象在CLI中的记录如下。
Response {
_events: [Object: null prototype] {},
_eventsCount: 0,
_maxListeners: undefined,
res: IncomingMessage {
_readableState: ReadableState {
objectMode: false,
highWaterMark: 16384,
buffer: BufferList { head: null, tail: null, length: 0 },
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: true,
endEmitted: true,
reading: false,
sync: true,
needReadable: false,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
paused: false,
emitClose: true,
autoDestroy: false,
destroyed: false,
defaultEncoding: 'utf8',
awaitDrain: 0,
readingMore: true,
decoder: [StringDecoder],
encoding: 'utf8'
},
readable: false,
_events: [Object: null prototype] {
end: [Array],
data: [Array],
error: [Array],
close: [Function: bound emit]
},
_eventsCount: 4,
_maxListeners: undefined,
socket: Socket {
connecting: false,
_hadError: false,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: true,
_events: [Object: null prototype],
_eventsCount: 6,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
parser: null,
_httpMessage: [ClientRequest],
[Symbol(asyncId)]: 150,
[Symbol(kHandle)]: [TCP],
[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],
readable: true,
_events: [Object: null prototype],
_eventsCount: 6,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
parser: null,
_httpMessage: [ClientRequest],
[Symbol(asyncId)]: 150,
[Symbol(kHandle)]: [TCP],
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0
},
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: true,
headers: {
'x-powered-by': 'Express',
'set-cookie': [Array],
location: '/',
vary: 'Accept',
'content-type': 'text/plain; charset=utf-8',
'content-length': '23',
date: 'Sat, 09 May 2020 09:52:40 GMT',
connection: 'close'
},
rawHeaders: [
'X-Powered-By',
'Express',
'Set-Cookie',
'access_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwiYWRtaW4iOnRydWUsInVzZXJpZCI6MSwiaWF0IjoxNTg5MDE3OTYwfQ.x4sRUhSqMaTFt2S3mrv6k3LOUecIgUJ4Cy8zWvdemss; Max-Age=3600; Path=/; Expires=Sat, 09 May 2020 10:52:40 GMT; HttpOnly',
'Location',
'/',
'Vary',
'Accept',
'Content-Type',
'text/plain; charset=utf-8',
'Content-Length',
'23',
'Date',
'Sat, 09 May 2020 09:52:40 GMT',
'Connection',
'close'
],
trailers: {},
rawTrailers: [],
aborted: false,
upgrade: false,
url: '',
method: null,
statusCode: 302,
statusMessage: 'Found',
client: Socket {
connecting: false,
_hadError: false,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: true,
_events: [Object: null prototype],
_eventsCount: 6,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
parser: null,
_httpMessage: [ClientRequest],
[Symbol(asyncId)]: 150,
[Symbol(kHandle)]: [TCP],
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0
},
_consuming: false,
_dumped: false,
req: ClientRequest {
_events: [Object: null prototype],
_eventsCount: 3,
_maxListeners: undefined,
outputData: [],
outputSize: 0,
writable: true,
_last: true,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: true,
sendDate: false,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
_contentLength: 39,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Socket],
connection: [Socket],
_header: 'POST /authenticate HTTP/1.1\r\n' +
'Host: 127.0.0.1:41185\r\n' +
'Accept-Encoding: gzip, deflate\r\n' +
'User-Agent: node-superagent/3.8.3\r\n' +
'Content-Type: application/json\r\n' +
'Content-Length: 39\r\n' +
'Connection: close\r\n' +
'\r\n',
_onPendingData: [Function: noopPendingOutput],
agent: [Agent],
socketPath: undefined,
method: 'POST',
path: '/authenticate',
_ended: true,
res: [Circular],
aborted: false,
timeoutCb: null,
upgradeOrConnect: false,
parser: null,
maxHeadersCount: null,
[Symbol(kNeedDrain)]: false,
[Symbol(isCorked)]: false,
[Symbol(kOutHeaders)]: [Object: null prototype]
},
text: 'Found. Redirecting to /'
},
request: Test {
_events: [Object: null prototype] {},
_eventsCount: 0,
_maxListeners: undefined,
_agent: false,
_formData: null,
method: 'POST',
url: 'http://127.0.0.1:41185/authenticate',
_header: {
'user-agent': 'node-superagent/3.8.3',
'content-type': 'application/json'
},
header: {
'User-Agent': 'node-superagent/3.8.3',
'Content-Type': 'application/json'
},
writable: true,
_redirects: 1,
_maxRedirects: 0,
cookies: '',
qs: {},
_query: [],
qsRaw: [],
_redirectList: [],
_streamRequest: false,
_buffer: true,
app: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 0,
_handle: null,
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '6::::0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 148
},
_asserts: [ [Function: bound ] ],
_server: Server {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 0,
_handle: null,
_usingWorkers: false,
_workers: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
keepAliveTimeout: 5000,
maxHeadersCount: null,
headersTimeout: 40000,
_connectionKey: '6::::0',
[Symbol(IncomingMessage)]: [Function: IncomingMessage],
[Symbol(ServerResponse)]: [Function: ServerResponse],
[Symbol(asyncId)]: 148
},
_data: { username: 'admin', password: 'admin' },
req: ClientRequest {
_events: [Object: null prototype],
_eventsCount: 3,
_maxListeners: undefined,
outputData: [],
outputSize: 0,
writable: true,
_last: true,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: true,
sendDate: false,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
_contentLength: 39,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Socket],
connection: [Socket],
_header: 'POST /authenticate HTTP/1.1\r\n' +
'Host: 127.0.0.1:41185\r\n' +
'Accept-Encoding: gzip, deflate\r\n' +
'User-Agent: node-superagent/3.8.3\r\n' +
'Content-Type: application/json\r\n' +
'Content-Length: 39\r\n' +
'Connection: close\r\n' +
'\r\n',
_onPendingData: [Function: noopPendingOutput],
agent: [Agent],
socketPath: undefined,
method: 'POST',
path: '/authenticate',
_ended: true,
res: [IncomingMessage],
aborted: false,
timeoutCb: null,
upgradeOrConnect: false,
parser: null,
maxHeadersCount: null,
[Symbol(kNeedDrain)]: false,
[Symbol(isCorked)]: false,
[Symbol(kOutHeaders)]: [Object: null prototype]
},
protocol: 'http:',
host: '127.0.0.1:41185',
_endCalled: true,
_callback: [Function],
res: IncomingMessage {
_readableState: [ReadableState],
readable: false,
_events: [Object: null prototype],
_eventsCount: 4,
_maxListeners: undefined,
socket: [Socket],
connection: [Socket],
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: true,
headers: [Object],
rawHeaders: [Array],
trailers: {},
rawTrailers: [],
aborted: false,
upgrade: false,
url: '',
method: null,
statusCode: 302,
statusMessage: 'Found',
client: [Socket],
_consuming: false,
_dumped: false,
req: [ClientRequest],
text: 'Found. Redirecting to /'
},
response: [Circular],
called: true
},
req: ClientRequest {
_events: [Object: null prototype] {
drain: [Function],
error: [Function],
prefinish: [Function: requestOnPrefinish]
},
_eventsCount: 3,
_maxListeners: undefined,
outputData: [],
outputSize: 0,
writable: true,
_last: true,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: true,
sendDate: false,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
_contentLength: 39,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: Socket {
connecting: false,
_hadError: false,
_parent: null,
_host: null,
_readableState: [ReadableState],
readable: true,
_events: [Object: null prototype],
_eventsCount: 6,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
parser: null,
_httpMessage: [Circular],
[Symbol(asyncId)]: 150,
[Symbol(kHandle)]: [TCP],
[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],
readable: true,
_events: [Object: null prototype],
_eventsCount: 6,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
parser: null,
_httpMessage: [Circular],
[Symbol(asyncId)]: 150,
[Symbol(kHandle)]: [TCP],
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0
},
_header: 'POST /authenticate HTTP/1.1\r\n' +
'Host: 127.0.0.1:41185\r\n' +
'Accept-Encoding: gzip, deflate\r\n' +
'User-Agent: node-superagent/3.8.3\r\n' +
'Content-Type: application/json\r\n' +
'Content-Length: 39\r\n' +
'Connection: close\r\n' +
'\r\n',
_onPendingData: [Function: noopPendingOutput],
agent: Agent {
_events: [Object: null prototype],
_eventsCount: 1,
_maxListeners: undefined,
defaultPort: 80,
protocol: 'http:',
options: [Object],
requests: {},
sockets: [Object],
freeSockets: {},
keepAliveMsecs: 1000,
keepAlive: false,
maxSockets: Infinity,
maxFreeSockets: 256
},
socketPath: undefined,
method: 'POST',
path: '/authenticate',
_ended: true,
res: IncomingMessage {
_readableState: [ReadableState],
readable: false,
_events: [Object: null prototype],
_eventsCount: 4,
_maxListeners: undefined,
socket: [Socket],
connection: [Socket],
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: true,
headers: [Object],
rawHeaders: [Array],
trailers: {},
rawTrailers: [],
aborted: false,
upgrade: false,
url: '',
method: null,
statusCode: 302,
statusMessage: 'Found',
client: [Socket],
_consuming: false,
_dumped: false,
req: [Circular],
text: 'Found. Redirecting to /'
},
aborted: false,
timeoutCb: null,
upgradeOrConnect: false,
parser: null,
maxHeadersCount: null,
[Symbol(kNeedDrain)]: false,
[Symbol(isCorked)]: false,
[Symbol(kOutHeaders)]: [Object: null prototype] {
host: [Array],
'accept-encoding': [Array],
'user-agent': [Array],
'content-type': [Array],
'content-length': [Array]
}
},
text: 'Found. Redirecting to /',
body: {},
files: undefined,
buffered: true,
headers: {
'x-powered-by': 'Express',
'set-cookie': [
'access_token=kkkhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwiYWRtaW4iOnRydWUsInVzZXJpZCI6MSwiaWF0IjoxNTg5MDE3OTYwfQ.x4sRUhSqMaTFt2S3mrv6k3LOUecIgUJ4Cy8zWvdemss; Max-Age=3600; Path=/; Expires=Sat, 09 May 2020 10:52:40 GMT; HttpOnly'
],
location: '/',
vary: 'Accept',
'content-type': 'text/plain; charset=utf-8',
'content-length': '23',
date: 'Sat, 09 May 2020 09:52:40 GMT',
connection: 'close'
},
header: {
'x-powered-by': 'Express',
'set-cookie': [
'access_token=lkJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwiYWRtaW4iOnRydWUsInVzZXJpZCI6MSwiaWF0IjoxNTg5MDE3OTYwfQ.x4sRUhSqMaTFt2S3mrv6k3LOUecIgUJ4Cy8zWvdemrr; Max-Age=3600; Path=/; Expires=Sat, 09 May 2020 10:52:40 GMT; HttpOnly'
],
location: '/',
vary: 'Accept',
'content-type': 'text/plain; charset=utf-8',
'content-length': '23',
date: 'Sat, 09 May 2020 09:52:40 GMT',
connection: 'close'
},
statusCode: 302,
status: 302,
statusType: 3,
info: false,
ok: false,
redirect: true,
clientError: false,
serverError: false,
error: false,
created: false,
accepted: false,
noContent: false,
badRequest: false,
unauthorized: false,
notAcceptable: false,
forbidden: false,
notFound: false,
unprocessableEntity: false,
type: 'text/plain',
charset: 'utf-8',
links: {},
setEncoding: [Function: bound ],
redirects: []
}
好了，我已经有了 a 解决方案，尽管是一个非常啰嗦的解决方案。
基本上我克隆了响应对象，然后将所有属性转换为enumerable。然后JSON.stringify仍然不能在新对象上执行，因为对象中包含循环引用。我们必须提供一个函数来替换循环引用（我不确定......也许是 "undefined"? 然后我们就可以将其字符串化。我已经记录了这个对象，然后复制并粘贴到JSON浏览器中。我想问题解决了--但我想有一个更简洁的解决方案。
let resclone = {...res}
//console.log(resclone);
const toEnumerable = (obj) => {
return Object.fromEntries(
Object.getOwnPropertyNames(obj).map(prop => [prop, obj[prop]])
);
};
var enumerated = toEnumerable(resclone)
const getCircularReplacer = () => {
const seen = new WeakSet();
return (key, value) => {
if (typeof value === "object" && value !== null) {
if (seen.has(value)) {
return;
}
seen.add(value);
}
return value;
};
};
let stringify = JSON.stringify(enumerated, getCircularReplacer());
console.log(stringify);