Node.js - 如何检查请求数据？
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【中文标题】Node.js - 如何检查请求数据？【英文标题】：Node.js - how to inspect request data? 【发布时间】：2017-09-25 23:09:24 【问题描述】：我有一个 Node.js 路由，它发回一些文本并记录请求：
app.post('/registerUser', function (req, res)
res.send('Hello World post!')
console.log(req);
)
然后我用 curl 击中那条路线，如下所示：
curl --data "username==test&foo==bar" http://localhost:3000/registerUser
这就是我通过节点得到的：
IncomingMessage
_readableState:
ReadableState
objectMode: false,
highWaterMark: 16384,
buffer: BufferList head: null, tail: null, length: 0 ,
length: 0,
pipes: null,
pipesCount: 0,
flowing: null,
ended: false,
endEmitted: false,
reading: false,
sync: true,
needReadable: false,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: true,
decoder: null,
encoding: null ,
readable: true,
domain: null,
_events: ,
_eventsCount: 0,
_maxListeners: undefined,
socket:
Socket
connecting: false,
_hadError: false,
_handle:
TCP
bytesRead: 183,
_externalStream: ,
fd: 14,
reading: true,
owner: [Circular],
onread: [Function: onread],
onconnection: null,
writeQueueSize: 0 ,
_parent: null,
_host: null,
_readableState:
ReadableState
objectMode: false,
highWaterMark: 16384,
buffer: [Object],
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null ,
readable: true,
domain: null,
_events:
end: [Object],
finish: [Function: onSocketFinish],
_socketEnd: [Function: onSocketEnd],
drain: [Object],
timeout: [Function],
error: [Function: socketOnError],
close: [Object],
data: [Function: socketOnData],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause] ,
_eventsCount: 10,
_maxListeners: undefined,
_writableState:
WritableState
objectMode: false,
highWaterMark: 16384,
needDrain: false,
ending: false,
ended: false,
finished: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 3,
prefinished: false,
errorEmitted: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] ,
writable: true,
allowHalfOpen: true,
destroyed: false,
_bytesDispatched: 222,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_idleTimeout: 120000,
_idleNext:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idlePrev:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idleStart: 144720,
parser:
HTTPParser
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: onParserExecute],
_headers: [],
_url: '',
_consumed: true,
socket: [Circular],
incoming: [Circular],
outgoing: null,
maxHeaderPairs: 2000,
onIncoming: [Function: parserOnIncoming] ,
on: [Function: socketOnWrap],
_paused: false,
read: [Function],
_consuming: true,
_httpMessage:
ServerResponse
domain: null,
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: false,
upgrading: false,
chunkedEncoding: false,
shouldKeepAlive: true,
useChunkedEncodingByDefault: true,
sendDate: true,
_removedHeader: [Object],
_contentLength: 17,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Circular],
connection: [Circular],
_header: 'HTTP/1.1 200 OK\r\nX-Powered-By: Express\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 17\r\nETag: W/"11-5i2g3OJs8No9M8PUhnLubxYJmZY"\r\nDate: Fri, 28 Apr 2017 00:06:49 GMT\r\nConnection: keep-alive\r\n\r\n',
_headers: [Object],
_headerNames: [Object],
_onPendingData: [Function: updateOutgoingData],
req: [Circular],
locals: ,
statusMessage: 'OK',
statusCode: 200 ,
connection:
Socket
connecting: false,
_hadError: false,
_handle:
TCP
bytesRead: 183,
_externalStream: ,
fd: 14,
reading: true,
owner: [Circular],
onread: [Function: onread],
onconnection: null,
writeQueueSize: 0 ,
_parent: null,
_host: null,
_readableState:
ReadableState
objectMode: false,
highWaterMark: 16384,
buffer: [Object],
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null ,
readable: true,
domain: null,
_events:
end: [Object],
finish: [Function: onSocketFinish],
_socketEnd: [Function: onSocketEnd],
drain: [Object],
timeout: [Function],
error: [Function: socketOnError],
close: [Object],
data: [Function: socketOnData],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause] ,
_eventsCount: 10,
_maxListeners: undefined,
_writableState:
WritableState
objectMode: false,
highWaterMark: 16384,
needDrain: false,
ending: false,
ended: false,
finished: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 3,
prefinished: false,
errorEmitted: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] ,
writable: true,
allowHalfOpen: true,
destroyed: false,
_bytesDispatched: 222,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_idleTimeout: 120000,
_idleNext:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idlePrev:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idleStart: 144720,
parser:
HTTPParser
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: onParserExecute],
_headers: [],
_url: '',
_consumed: true,
socket: [Circular],
incoming: [Circular],
outgoing: null,
maxHeaderPairs: 2000,
onIncoming: [Function: parserOnIncoming] ,
on: [Function: socketOnWrap],
_paused: false,
read: [Function],
_consuming: true,
_httpMessage:
ServerResponse
domain: null,
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: false,
upgrading: false,
chunkedEncoding: false,
shouldKeepAlive: true,
useChunkedEncodingByDefault: true,
sendDate: true,
_removedHeader: [Object],
_contentLength: 17,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Circular],
connection: [Circular],
_header: 'HTTP/1.1 200 OK\r\nX-Powered-By: Express\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 17\r\nETag: W/"11-5i2g3OJs8No9M8PUhnLubxYJmZY"\r\nDate: Fri, 28 Apr 2017 00:06:49 GMT\r\nConnection: keep-alive\r\n\r\n',
_headers: [Object],
_headerNames: [Object],
_onPendingData: [Function: updateOutgoingData],
req: [Circular],
locals: ,
statusMessage: 'OK',
statusCode: 200 ,
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: false,
headers:
host: 'localhost:3000',
'user-agent': 'curl/7.43.0',
accept: '*/*',
'content-length': '23',
'content-type': 'application/x-www-form-urlencoded' ,
rawHeaders:
[ 'Host',
'localhost:3000',
'User-Agent',
'curl/7.43.0',
'Accept',
'*/*',
'Content-Length',
'23',
'Content-Type',
'application/x-www-form-urlencoded' ],
trailers: ,
rawTrailers: [],
upgrade: false,
url: '/registerUser',
method: 'POST',
statusCode: null,
statusMessage: null,
client:
Socket
connecting: false,
_hadError: false,
_handle:
TCP
bytesRead: 183,
_externalStream: ,
fd: 14,
reading: true,
owner: [Circular],
onread: [Function: onread],
onconnection: null,
writeQueueSize: 0 ,
_parent: null,
_host: null,
_readableState:
ReadableState
objectMode: false,
highWaterMark: 16384,
buffer: [Object],
length: 0,
pipes: null,
pipesCount: 0,
flowing: true,
ended: false,
endEmitted: false,
reading: true,
sync: false,
needReadable: true,
emittedReadable: false,
readableListening: false,
resumeScheduled: false,
defaultEncoding: 'utf8',
ranOut: false,
awaitDrain: 0,
readingMore: false,
decoder: null,
encoding: null ,
readable: true,
domain: null,
_events:
end: [Object],
finish: [Function: onSocketFinish],
_socketEnd: [Function: onSocketEnd],
drain: [Object],
timeout: [Function],
error: [Function: socketOnError],
close: [Object],
data: [Function: socketOnData],
resume: [Function: onSocketResume],
pause: [Function: onSocketPause] ,
_eventsCount: 10,
_maxListeners: undefined,
_writableState:
WritableState
objectMode: false,
highWaterMark: 16384,
needDrain: false,
ending: false,
ended: false,
finished: false,
decodeStrings: false,
defaultEncoding: 'utf8',
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 3,
prefinished: false,
errorEmitted: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] ,
writable: true,
allowHalfOpen: true,
destroyed: false,
_bytesDispatched: 222,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_server:
Server
domain: null,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
_connections: 1,
_handle: [Object],
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: 120000,
_pendingResponseData: 0,
_connectionKey: '6::::3000' ,
_idleTimeout: 120000,
_idleNext:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idlePrev:
TimersList
_idleNext: [Circular],
_idlePrev: [Circular],
_timer: [Object],
_unrefed: true,
msecs: 120000 ,
_idleStart: 144720,
parser:
HTTPParser
'0': [Function: parserOnHeaders],
'1': [Function: parserOnHeadersComplete],
'2': [Function: parserOnBody],
'3': [Function: parserOnMessageComplete],
'4': [Function: onParserExecute],
_headers: [],
_url: '',
_consumed: true,
socket: [Circular],
incoming: [Circular],
outgoing: null,
maxHeaderPairs: 2000,
onIncoming: [Function: parserOnIncoming] ,
on: [Function: socketOnWrap],
_paused: false,
read: [Function],
_consuming: true,
_httpMessage:
ServerResponse
domain: null,
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: false,
upgrading: false,
chunkedEncoding: false,
shouldKeepAlive: true,
useChunkedEncodingByDefault: true,
sendDate: true,
_removedHeader: [Object],
_contentLength: 17,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket: [Circular],
connection: [Circular],
_header: 'HTTP/1.1 200 OK\r\nX-Powered-By: Express\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 17\r\nETag: W/"11-5i2g3OJs8No9M8PUhnLubxYJmZY"\r\nDate: Fri, 28 Apr 2017 00:06:49 GMT\r\nConnection: keep-alive\r\n\r\n',
_headers: [Object],
_headerNames: [Object],
_onPendingData: [Function: updateOutgoingData],
req: [Circular],
locals: ,
statusMessage: 'OK',
statusCode: 200 ,
_consuming: false,
_dumped: false,
next: [Function: next],
baseUrl: '',
originalUrl: '/registerUser',
_parsedUrl:
Url
protocol: null,
slashes: null,
auth: null,
host: null,
port: null,
hostname: null,
hash: null,
search: null,
query: null,
pathname: '/registerUser',
path: '/registerUser',
href: '/registerUser',
_raw: '/registerUser' ,
params: ,
query: ,
res:
ServerResponse
domain: null,
_events: finish: [Function: resOnFinish] ,
_eventsCount: 1,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: false,
upgrading: false,
chunkedEncoding: false,
shouldKeepAlive: true,
useChunkedEncodingByDefault: true,
sendDate: true,
_removedHeader: 'content-length': false ,
_contentLength: 17,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket:
Socket
connecting: false,
_hadError: false,
_handle: [Object],
_parent: null,
_host: null,
_readableState: [Object],
readable: true,
domain: null,
_events: [Object],
_eventsCount: 10,
_maxListeners: undefined,
_writableState: [Object],
writable: true,
allowHalfOpen: true,
destroyed: false,
_bytesDispatched: 222,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: [Object],
_server: [Object],
_idleTimeout: 120000,
_idleNext: [Object],
_idlePrev: [Object],
_idleStart: 144720,
parser: [Object],
on: [Function: socketOnWrap],
_paused: false,
read: [Function],
_consuming: true,
_httpMessage: [Circular] ,
connection:
Socket
connecting: false,
_hadError: false,
_handle: [Object],
_parent: null,
_host: null,
_readableState: [Object],
readable: true,
domain: null,
_events: [Object],
_eventsCount: 10,
_maxListeners: undefined,
_writableState: [Object],
writable: true,
allowHalfOpen: true,
destroyed: false,
_bytesDispatched: 222,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: [Object],
_server: [Object],
_idleTimeout: 120000,
_idleNext: [Object],
_idlePrev: [Object],
_idleStart: 144720,
parser: [Object],
on: [Function: socketOnWrap],
_paused: false,
read: [Function],
_consuming: true,
_httpMessage: [Circular] ,
_header: 'HTTP/1.1 200 OK\r\nX-Powered-By: Express\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 17\r\nETag: W/"11-5i2g3OJs8No9M8PUhnLubxYJmZY"\r\nDate: Fri, 28 Apr 2017 00:06:49 GMT\r\nConnection: keep-alive\r\n\r\n',
_headers:
'x-powered-by': 'Express',
'content-type': 'text/html; charset=utf-8',
'content-length': '17',
etag: 'W/"11-5i2g3OJs8No9M8PUhnLubxYJmZY"' ,
_headerNames:
'x-powered-by': 'X-Powered-By',
'content-type': 'Content-Type',
'content-length': 'Content-Length',
etag: 'ETag' ,
_onPendingData: [Function: updateOutgoingData],
req: [Circular],
locals: ,
statusMessage: 'OK',
statusCode: 200 ,
route:
Route
path: '/registerUser',
stack: [ [Object] ],
methods: post: true
问题是我的username==test 和foo=bar 去哪儿了？如何访问req.data 或类似的东西？
我现在正在查看文档：https://nodejs.org/api/http.html#http_class_http_incomingmessage，这没有任何意义，我在请求中传递的数据没有一个字，我关心的一切都是我的数据，这就是我正在工作的on，这就是我要推送到 MongoDB 的内容。
我错过了一些大事。帮助？ :)
【问题讨论】：
继续阅读该页面。当您到达 "message.url" 时，请格外注意。有一个完整、详细的解释，以及一个你正在尝试做什么的例子...... 还有一件事我忘了提到@Wordpressor，一旦你得到正文，只需使用 req.body.email 或任何名称将其推送到数据库 ***.com/questions/34028851/… 【参考方案1】：如果您使用 express，那么如果您打印请求，简单请求将不会提供您想要的数据。
req.body 包含在请求正文中提交的数据键值对。默认情况下，它是未定义的，并在您使用 body-parser 和 multer 等正文解析中间件时填充。
这是文档中提到并由 Express Framework https://expressjs.com/en/api.html 推荐的内容
所以如果你想在 express 中检查它，可以这样做
var app =
require('express')();
var bodyParser = require('body-parser');
var multer = require('multer'); // v1.0.5
var upload = multer(); // for parsing multipart/form-data
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded( extended: true )); // for parsing application/x-www-form-urlencoded
app.post('/registerUser', function (req, res)
console.log(req.body); //console.log(req)
res.json(req.body); //res.send("hello world post")
);
您也可以在不使用 express 框架或正文解析器的情况下检查您的请求。 在这里我只是发布一个简单的例子来打印每个请求的帖子正文
var http =
require("http");
http.createServer(function (request, response)
request.on('data', function(chunk)
var bodydata = chunk.toString('utf8');
console.log(bodydata)
);
response.writeHead(200, 'Content-Type': 'text/plain');
response.end('hi welcome\n');
).listen(8081);
console.log('Server running at http://127.0.0.1:8081/');
如果你使用 bodyparser 和 express 会是什么样子
here is body is you use body parser and express
这是我的发帖请求
这是我将缓冲区转换为字符串的输出
这是我的简单节点请求，不使用包含数据事件的 express
数据作为req中的缓冲区
【讨论】：
【参考方案2】：这基本上就是 Express 的工作方式：
var express = require('express'),
bodyparser = require('body-parser');
var app = express();
// Middleware
app.use(bodyparser.urlencoded(extended: false));
app.get('/foo', function (req, res)
// GET /foo?msg=hello ---> msg: 'hello'
console.log(req.query);
);
app.post('/bar', function (req, res)
// POST msg=hello ---> msg: 'hello'
console.log(req.body);
);
app.listen(3000);
【讨论】：
【参考方案3】：如果传入的请求是GET，那么您可以通过req.query 访问它，并且这是开箱即用的 express。如果传入请求是POST，您需要使用this 之类的内容，然后您可以通过访问req.body 来访问传入信息。
【讨论】：
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