tag:blogger.com,1999:blog-5502193732299119611.post1110722844980419712..comments2009-09-11T17:18:55.462-07:00The App Engine Fanhttp://www.blogger.com/profile/14769199738243128956noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-5502193732299119611.post-2142459774177200642009-09-11T17:18:55.462-07:002009-09-11T17:18:55.462-07:00&gt;Do you know if they have restrictions with long-id keys?<br /><br />I&#39;m not aware of that, but that doesn&#39;t mean there are none. This would probably be an interesting question for the App Engine forum. If you hear anything there, can you please post it back to this discussion thread?<br /><br />Thanks.<br /><br /> JensThe App Engine Fanhttp://www.blogger.com/profile/14769199738243128956noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-1904282233066788062009-09-11T03:06:23.133-07:002009-09-11T03:06:23.133-07:00Little known fact indeed ...thanks<br />Do you know if they have restrictions with long-id keys? (Like maybe some extra encoding/decoding internally)Casterhttp://www.blogger.com/profile/01556230467425114872noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-72844831084234020462009-09-10T19:12:38.676-07:002009-09-10T19:12:38.676-07:00&gt; what was the reason behind the encoding/decoding (prefixed with &#39;:&#39;) of the keys?<br /><br />Excellent question :-)<br />It is a little known fact that all string keys in App Engine have to start with a non-numeric value. If you try to create a primary string key like &quot;123&quot;, the API will throw an Error. A common pattern to prevent that from happening is to always prepend a non-numeric character (in this example, the colon)The App Engine Fanhttp://www.blogger.com/profile/14769199738243128956noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-80908705349845441072009-09-10T04:24:59.541-07:002009-09-10T04:24:59.541-07:00Btw, in the protobuf persistence, what was the reason behind the encoding/decoding (prefixed with &#39;:&#39;) of the keys?Casterhttp://www.blogger.com/profile/01556230467425114872noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-62305362295292905782009-04-21T15:27:00.000-07:002009-04-21T15:27:00.000-07:00I used : <A HREF="http://www.movable-type.co.uk/scripts/tea-block.html" REL="nofollow">Block TEA (Tiny Encryption Algorithm)</A>After the encryption I converted the encrypted string to longs before posting it to GAE.Adihttp://www.blogger.com/profile/01331735648858763677noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-60315007196859987572009-04-21T06:06:00.000-07:002009-04-21T06:06:00.000-07:00Hi Adi,<br /><br />Thanks for the feedback :-)<br />Out of curiosity: what did you use to encrypt the passwords on the client side? I have yet to implement my "Scrambler", and it would be cool if I do not have to reinvent the wheel.<br /><br />Cheers,<br /><br /> JensThe App Engine Fanhttp://www.blogger.com/profile/14769199738243128956noreply@blogger.comtag:blogger.com,1999:blog-5502193732299119611.post-71774110525927417122009-04-19T15:32:00.000-07:002009-04-19T15:32:00.000-07:00Hi,<br />Great blog ! <br />I have also created a password manager as my first GAE application:<A HREF="http://paswd.appspot.com/" REL="nofollow">password++</A> <br />It looks easier using GWT !<br /><br />AdiAdihttp://www.blogger.com/profile/01331735648858763677noreply@blogger.com