node.js - express response with a callback -



node.js - express response with a callback -

is possible send response express, , wait homecoming response before continuing?

a typical scenario this

server sends request server b. server b processes request , sends server server b waits response server before continuing server farther processing of response server b , sends server b server b handles rest of processing required.

my understanding handled callbacks. in express expect

res.write('response', callback);

function callback() { //do stuff }

i don't see possible res.write method though. there method can utilize express functionality? i've never used socket.io before, seems scenario websockets useful. wrong in assumption?

res.on('finish', callback);

is sent when lastly of info given os deal with.

http://nodejs.org/api/http.html#http_event_finish

if need know when client receives/processes data, however, client must send server, in case socket.io help.

node.js asynchronous express callback

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