[CB-9435] cordova-ios cannot handle Unicode U+2028 (line separator) or U+2029 (paragraph separator)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: cordova-ios
• Labels: cordova-ios-4.0.x
• Assignee: Jesse MacFadyen
• Reporter: Chris Brody
• Created: 30/Jul/15 23:59
• Updated: 23/Aug/18 06:56
• Resolved: 02/Oct/15 21:32

Description

In https://github.com/litehelpers/Cordova-sqlite-storage/issues/147 someone reported that my sqlite plugin could not handle \u2028 characters on iOS, and further testing on my part isolated this to the result callback message. I made a version of cordova-ext-echo at https://github.com/brodybits/cordova-ext-echo-and-length that can be used to demonstrate this issue cordova-ios.

If I install the plugin from https://github.com/brodybits/cordova-ext-echo-and-length and run the following code on the iOS version:

        var Echo = cordova.require('org.apache.cordova.plugins.echo.Echo');
        Echo.echo('first\u2027second', function(v) {
          console.log('cb 1: ' + v);
        });
        Echo.echo('third\u2028fourth', function(v) {
          console.log('cb 2: ' + v);
        });
        Echo.echo('fifth\u2029six', function(v) {
          console.log('cb 3: ' + v);
        });

        Echo.len('first\u2027second', function(v) {
          console.log('len cb 1: ' + v);
        });
        Echo.len('third\u2028fourth', function(v) {
          console.log('len cb 2: ' + v);
        });
        Echo.len('fifth\u2029six', function(v) {
          console.log('len cb 3: ' + v);
        });

I get the following result:

2015-07-31 01:21:11.968 cijt[25760:18e03] cb 1: first‧second
2015-07-31 01:21:11.971 cijt[25760:18e03] len cb 1: 12
2015-07-31 01:21:11.973 cijt[25760:18e03] len cb 2: 12
2015-07-31 01:21:11.973 cijt[25760:18e03] len cb 3: 9

We can see that we can send a string with U+2028 and U+2029 from Javascript to Objective-C with no problems: if Objective-C calculates and returns the length it works but if Objective-C tries to send the same string back to Javascript it fails.

I discovered the following article that seems to describe the cause: http://timelessrepo.com/json-isnt-a-javascript-subset (Cordova does seem to handle the \u000A and \u000D characters OK.)

When I ran the same test program on Android (with the same plugin installed), I get all of the callbacks ok (trace filtered by hand):

I/chromium(14744): [INFO:CONSOLE(173)] "cb 1: first‧second", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)
I/chromium(14744): [INFO:CONSOLE(173)] "cb 2: third
fourth", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)
I/chromium(14744): [INFO:CONSOLE(173)] "cb 3: fifth
six", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)
I/chromium(14744): [INFO:CONSOLE(173)] "len cb 1: 12", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)
I/chromium(14744): [INFO:CONSOLE(173)] "len cb 2: 12", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)
I/chromium(14744): [INFO:CONSOLE(173)] "len cb 3: 9", source: file:///android_asset/www/plugins/cordova-plugin-console/www/console-via-logger.js (173)