From: Jo-Philipp Wich <jow@openwrt.org>
Date: Mon, 16 Apr 2012 16:48:59 +0000 (+0000)
Subject: Fix JSON NaN
X-Git-Tag: 0.11.0~779
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b6c98f9c579e8f18af57962d0e500b5b20bf6439;p=project%2Fluci.git

Fix JSON NaN

Hi,

The attached patch fixes the JSON generation when dealing with NaN (not
a number), this makes the JSON parsing in the web browser succeed
(before it would get a "nan" which is not a valid JS value)

Chris
---

diff --git a/libs/web/luasrc/http.lua b/libs/web/luasrc/http.lua
index 8585405484..60a3e07228 100644
--- a/libs/web/luasrc/http.lua
+++ b/libs/web/luasrc/http.lua
@@ -333,7 +333,12 @@ function write_json(x)
 			write(" }")
 		end
 	elseif type(x) == "number" or type(x) == "boolean" then
-		write(tostring(x))
+		if (x ~= x) then
+			-- NaN is the only value that doesn't equal to itself.   
+			write("Number.NaN")
+		else
+			write(tostring(x))
+		end
 	elseif type(x) == "string" then
 		write("%q" % tostring(x))
 	end