node.js - koa.js streaming response from remote url -

i want create koa route acts proxy url, delivers file few dozens of megabytes.

therefore not block when making response. using this.body = yield request.get(url); currently, request [co-request]1 module.

how stream response client ?

edit :

i doing following :

var req = require('request'); //... this.body = req(url).pipe(fs.createwritestream(this.params.what));

if paste url in browser, file fine. if error: cannot pipe. not readable. in route.

turns out solution :

var req = require('request'); //... this.body = req(url);

this because this.body has readable stream, req(url) returns. @danneu explanation.

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