Rick,
Checkout the text in the subject. I receive this content from a popular web service my app uses. I discovered that this text is crashing the JSON parser - E.g. loSerializer.DeserializeJson(m.lc).
In the framework we have: lcName = CHRTRAN(lcName," `~!@#$%^&*()-+={}[]|/?.,<>:;'" + ["],"")
Maybe you can add the ° in here?
Uh no 😃
If you have JSON that includes invalid characters that are not supported by FoxPro it'll crash. Since the serializer creates properties from the JSON properties and FoxPro can't use 'dynamic' string based names like JavaScript it's going to break. This will happen with any variable that includes extended characters that can't be expressed as FoxPro values.
Garbage in - Garbage out stands pretty much in this scenario.
+++ Rick ---
I did predict your answer to one of my dev's just seconds before reading it (lol). However, I would think that if your comment is ubiquitous that a site like jsonlint or the equivalent should fail the formatting and validation, no?
(holding my breath until you reply...)
For JavaScript you can use:
var obj = {};
obj["Really Hot 100° Weather"] = "Hot Potato";
var text = obj["Really Hot 100° Weather"]; // Hot Potato
However JavaScript also doesn't support that same var name as an attach object property, same as FoxPro.
Point is - if people do stupid shit in JSON, it won't translate into Foxpro. I suppose we could strip just about everything but numbers, text and certain dashes, so as to be legal, but then you run into other problems like duplication very quickly.
+++ Rick ---
My thought was that since the framework already has this: lcName = CHRTRAN(lcName," `~!@#$%^&*()-+={}[]|/?.,<>:;'" + ["],"") - You have set the stage for eliminating non-alpha characters.
- or -
Wouldn't we want to display - \u00b0
Ok fine. Challenge accepted.
As far as I know FoxPro supports varnames to only have alpha numeric digits and _. Everything else is effectively invalid.
Add Property to wwJsonSerializer:
VarNameCharacterFilter = ""
In Init:
lcCharFilter = ""
FOR lnX = 1 TO 255
IF (lnX >= 65 AND lnX <= 90) OR ;
(lnX >= 97 AND lnX <= 122) OR ;
(lnX >=48 AND lnX <=57) OR ;
lnX = 95
loop
ENDIF
lcCharFilter = lcCharFilter + CHR(lnX)
ENDFOR
THIS.VarNameCharacterFilter = lcCharFilter
In ParseObject:
lcName = CHRTRAN(lcName,this.VarNameCharacterFilter,"")
This then works:
DO wwJsonSerializer && Load Libs
lcJson = [{ "100°Weather_zZAa09": "It's hot" }]
o = CREATEOBJECT("wwJsonSerializer")
loResult = o.DeSerializeJson(lcJson)
? loResult._100Weather_zZAa09
Note FoxPro doesn't allow vars that start with a digit so the serializer prefixes with _.
+++ Rick ---
Ha! You are awesome. By any chance will your slick lil funtion make its way into the framework for 6.18 ?
Yes.
But you can fix your code now and run it.
Or you can download an update from:
+++ Rick ---