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Posted to issues@cordova.apache.org by "Jesse MacFadyen (JIRA)" <ji...@apache.org> on 2015/10/02 23:32:26 UTC
[jira] [Resolved] (CB-9435) cordova-ios cannot handle Unicode
U+2028 (line separator) or U+2029 (paragraph separator)
[ https://issues.apache.org/jira/browse/CB-9435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jesse MacFadyen resolved CB-9435.
---------------------------------
Resolution: Won't Fix
Unfortunately, this cannot be addressed directly. You will need to find a work-around.
The super simplified way of seeing the issue is to simply call the following:
{code}
[self.webView stringByEvaluatingJavaScriptFromString:@"alert('Hey \u2029 WTF?');"]; // nothing gets thru ...
{code}
If, however, you do the following, you can get the value thru.
{code}
[self.webView stringByEvaluatingJavaScriptFromString:@"var str = unescape('\\u2029'); alert('Hey ' + str + ' WTF?');"];
{code}
Ultimately, this probably means that your sqlite plugin will need to escape/encode \u2028 + \u2029 going into the database, and decode them coming out.
> cordova-ios cannot handle Unicode U+2028 (line separator) or U+2029 (paragraph separator)
> -----------------------------------------------------------------------------------------
>
> Key: CB-9435
> URL: https://issues.apache.org/jira/browse/CB-9435
> Project: Apache Cordova
> Issue Type: Bug
> Components: iOS
> Reporter: Chris Brody
> Assignee: Jesse MacFadyen
> Labels: cordova-ios-4.0.x
>
> 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)
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