[fix] catch max file size

frappe/boot.py

@@ -75,6 +75,7 @@ def get_bootinfo():
 
 def load_conf_settings(bootinfo):
 	from frappe import conf
+	bootinfo.max_file_size = conf.get('max_file_size') or 3145728
 	for key in ['developer_mode']:
 		if key in conf: bootinfo[key] = conf.get(key)
 

frappe/public/js/frappe/request.js

@@ -71,6 +71,10 @@ frappe.request.call = function(opts) {
 		508: function(xhr) {
 			msgprint(__("Another transaction is blocking this one. Please try again in a few seconds."));
 		},
+		413: function(data, xhr) {
+			msgprint(__("File size exceeded the maximum allowed size of {0} MB",
+				[(frappe.boot.max_file_size || 3145728) / 1048576]))
+		},
 		417: function(data, xhr) {
 			if(typeof data === "string") data = JSON.parse(data);
 			opts.error_callback && opts.error_callback(data, xhr.responseText);