http node cannot handle large files in post request

[adasilva70]

This issue was originally reported by Bluemix customer via a support case.

http node cannot handle large files (it works fine in the non-Bluemix version of node-red).
I created a very simple flow:

• http input node configured for POST and accepting files
• empty function node
• http response

then I tried to post a large file using curl:

curl -d "@failreq.json" -X POST http://adasilva-node-red.mybluemix.net/test

The file has about 220kb. I cloned this repo and tried to change the index.js file adding the following code:

 var maxApiRequestSize = settings.apiMaxLength || '5mb';
 app.use(bodyParser.json({limit:maxApiRequestSize}));
 app.use(bodyParser.urlencoded({limit:maxApiRequestSize,extended:true}));

but it did not help. Here is the error I am seeing:

2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT 30 Jan 23:00:55 - [warn] [http in:355828e2.d32798] Error: request entity too large
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at readStream (/home/vcap/app/node_modules/node-red/node_modules/raw-body/index.js:196:17)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at getRawBody (/home/vcap/app/node_modules/node-red/node_modules/raw-body/index.js:106:12)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at read (/home/vcap/app/node_modules/node-red/node_modules/body-parser/lib/read.js:76:3)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at urlencodedParser (/home/vcap/app/node_modules/node-red/node_modules/body-parser/lib/types/urlencoded.js:115:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at metricsHandler (/home/vcap/app/node_modules/node-red/nodes/core/io/21-httpin.js:215:59)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at httpMiddleware (/home/vcap/app/node_modules/node-red/nodes/core/io/21-httpin.js:207:59)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at cookieParser (/home/vcap/app/node_modules/cookie-parser/index.js:56:14)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Route.dispatch (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/route.js:112:3)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at /home/vcap/app/node_modules/node-red/node_modules/express/lib/router/index.js:281:22
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Function.process_params (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/index.js:335:12)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at next (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/index.js:275:10)
   2018-01-30T18:00:55.78-0500 [APP/PROC/WEB/0] OUT     at Layer.handle [as handle_request] (/home/vcap/app/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)