前者是server代码如下

Server {
domain: null,
_events:
{ request:
{ [Function]
domain: undefined,
_events: [Object],
_maxListeners: undefined,
setMaxListeners: [Function: setMaxListeners],
getMaxListeners: [Function: getMaxListeners],
emit: [Function: emit],
addListener: [Function: addListener],
on: [Function: addListener],
once: [Function: once],
removeListener: [Function: removeListener],
removeAllListeners: [Function: removeAllListeners],
listeners: [Function: listeners],
listenerCount: [Function: listenerCount],
init: [Function: init],
defaultConfiguration: [Function: defaultConfiguration],
lazyrouter: [Function: lazyrouter],
handle: [Function: handle],
use: [Function: use],
route: [Function: route],
engine: [Function: engine],
param: [Function: param],
set: [Function: set],
path: [Function: path],
enabled: [Function: enabled],
disabled: [Function: disabled],
enable: [Function: enable],
disable: [Function: disable],
checkout: [Function],
connect: [Function],
copy: [Function],
delete: [Function],
get: [Function],
head: [Function],
lock: [Function],
'm-search': [Function],
merge: [Function],
mkactivity: [Function],
mkcalendar: [Function],
mkcol: [Function],
move: [Function],
notify: [Function],
options: [Function],
patch: [Function],
post: [Function],
propfind: [Function],
proppatch: [Function],
purge: [Function],
put: [Function],
report: [Function],
search: [Function],
subscribe: [Function],
trace: [Function],
unlock: [Function],
unsubscribe: [Function],
all: [Function: all],
del: [Function],
render: [Function: render],
listen: [Function: listen],
request: [Object],
response: [Object],
cache: {},
engines: {},
settings: [Object],
_eventsCount: ,
locals: [Object],
mountpath: '/',
_router: [Object] },
connection: [Function: connectionListener],
clientError: [Function] },
_eventsCount: ,
_maxListeners: undefined,
_connections: ,
_handle:
TCP {
_externalStream: {},
fd: ,
reading: false,
owner: [Circular],
onread: null,
onconnection: [Function: onconnection],
writeQueueSize: },
_usingSlaves: false,
_slaves: [],
_unref: false,
allowHalfOpen: true,
pauseOnConnect: false,
httpAllowHalfOpen: false,
timeout: ,
_pendingResponseData: ,
_connectionKey: '6::::3000' }

后者还没有实例化算是一个类:代码如下:

{ [Function]
domain: undefined,
_events: { mount: [Function: onmount] },
_maxListeners: undefined,
setMaxListeners: [Function: setMaxListeners],
getMaxListeners: [Function: getMaxListeners],
emit: [Function: emit],
addListener: [Function: addListener],
on: [Function: addListener],
once: [Function: once],
removeListener: [Function: removeListener],
removeAllListeners: [Function: removeAllListeners],
listeners: [Function: listeners],
listenerCount: [Function: listenerCount],
init: [Function: init],
defaultConfiguration: [Function: defaultConfiguration],
lazyrouter: [Function: lazyrouter],
handle: [Function: handle],
use: [Function: use],
route: [Function: route],
engine: [Function: engine],
param: [Function: param],
set: [Function: set],
path: [Function: path],
enabled: [Function: enabled],
disabled: [Function: disabled],
enable: [Function: enable],
disable: [Function: disable],
checkout: [Function],
connect: [Function],
copy: [Function],
delete: [Function],
get: [Function],
head: [Function],
lock: [Function],
'm-search': [Function],
merge: [Function],
mkactivity: [Function],
mkcalendar: [Function],
mkcol: [Function],
move: [Function],
notify: [Function],
options: [Function],
patch: [Function],
post: [Function],
propfind: [Function],
proppatch: [Function],
purge: [Function],
put: [Function],
report: [Function],
search: [Function],
subscribe: [Function],
trace: [Function],
unlock: [Function],
unsubscribe: [Function],
all: [Function: all],
del: [Function],
render: [Function: render],
listen: [Function: listen],
request: IncomingMessage { app: [Circular] },
response: ServerResponse { app: [Circular] },
cache: {},
engines: {},
settings:
{ 'x-powered-by': true,
etag: 'weak',
'etag fn': [Function: wetag],
env: 'development',
'query parser': 'extended',
'query parser fn': [Function: parseExtendedQueryString],
'subdomain offset': ,
'trust proxy': false,
'trust proxy fn': [Function: trustNone],
view: [Function: View],
views: '/Users/Amanda/Downloads/aa/blog/views',
'jsonp callback name': 'callback' },
_eventsCount: ,
locals:
{ settings:
{ 'x-powered-by': true,
etag: 'weak',
'etag fn': [Function: wetag],
env: 'development',
'query parser': 'extended',
'query parser fn': [Function: parseExtendedQueryString],
'subdomain offset': ,
'trust proxy': false,
'trust proxy fn': [Function: trustNone],
view: [Function: View],
views: '/Users/Amanda/Downloads/aa/blog/views',
'jsonp callback name': 'callback' } },
mountpath: '/',
_router:
{ [Function: router]
params: {},
_params: [],
caseSensitive: false,
mergeParams: undefined,
strict: false,
stack: [ [Object], [Object], [Object] ] } }

另外app.createServer()此方法已经被废除;属于旧代码;websocket要监听服务器,监听实例化得app,即第一种server;

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