[config] Add option for changing max payload size on requests sent to server. Closes #5775.

config/kibana.yml

@@ -8,6 +8,9 @@
 # specify that path here. The basePath can't end in a slash.
 # server.basePath: ""
 
+# The maximum payload size in bytes on incoming server requests.
+# server.maxPayloadBytes: 1048576
+
 # The Elasticsearch instance to use for all your queries.
 # elasticsearch.url: "http://localhost:9200"
 

src/server/config/schema.js

@@ -28,6 +28,7 @@ module.exports = () => Joi.object({
   server: Joi.object({
     host: Joi.string().hostname().default('0.0.0.0'),
     port: Joi.number().default(5601),
+    maxPayloadBytes: Joi.number().default(1048576),
     autoListen: Joi.boolean().default(true),
     defaultRoute: Joi.string(),
     basePath: Joi.string().default('').allow('').regex(/(^$|^\/.*[^\/]$)/, `start with a slash, don't end with one`),

src/server/http/index.js

@@ -20,7 +20,10 @@ module.exports = function (kbnServer, server, config) {
       strictHeader: false
     },
     routes: {
-      cors: config.get('server.cors')
+      cors: config.get('server.cors'),
+      payload: {
+        maxBytes: config.get('server.maxPayloadBytes')
+      }
     }
   };