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Monthly Archives Juni 2010

Develop with iOS 4 SDK on an OS 3.0 Device

After upgrading to iOS 4.0 SDK, iPhone OS 3.0 is no longer a valid “Base SDK”. Naively switching to iPhone 3.2 prevents deployment to a 3.0 device.

But such “Project -> Edit Project Settings” work out fine:

“Deployment Target” hint found here.

Posted 23 Juni 2010 † Marcus Rohrmoser § Articles in english § development ‡ Comments (0) ° Tagged: , , , , , ,

iOS 4 Simulator crash (when installed to custom folder)

just downloaded and installed the iOS 4 SDK and as my root OS X partition is rather (too) small, I put it into a custom location /Users/Developer.Snowleopard/.

This causes the iPhone Simulator to crash and compiling gives an error like:

ibtool failed with exception: Interface Builder encountered an error communicating with the iPhone Simulator. If you …

Posted 23 Juni 2010 † Marcus Rohrmoser § Articles in english § development ‡ Comments (1) ° Tagged: , , , , ,

XCode: missing “deprecated” warnings

when developing for long-term use, you want to use APIs that aren’t likely to be removed soon, a.k.a. “deprecated”.

So, don’t use downward compatible calls below a point you really aim for.

XCode helps with compiler warnings about “deprecated” calls – if “Project -> Edit Project Settings -> GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS” is set:

But be careful, this complains e.g. …

Posted 22 Juni 2010 † Marcus Rohrmoser § Articles in english § development ‡ Comments (0) ° Tagged: , , , , , , , , ,

Simple HTTP Access Authorisation

sometimes you may want to lock down RESTful APIs or plain HTTP GET resources for authorised access by your own client software only, without requiring authentication. You don’t know who (not authenticated), but you know she may access (is authorised).

If the server has a valid SSL certificate based on a root certificate pre-installed on the …

Posted 14 Juni 2010 † Marcus Rohrmoser § sysadmin ‡ Comments (0) ° Tagged: , , , , , , , , , , ,

Automatic gzip compression for Apache2 Webservers

after failing and failing again in the last months, I finally got it with the help of http://www.debian-administration.org/articles/137

The .htaccess configuration
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css application/javascript
requires Apache’s mod_deflate enabled via
$ a2enmod deflate
Module deflate installed; run /etc/init.d/apache2 force-reload to enable.
Check the result with http://www.gidnetwork.com/tools/gzip-test.php

Caution: There seems to be an If-Modified-Since/Last-Modified HTTP 304 bug in mod_deflate, …

Posted 13 Juni 2010 † Marcus Rohrmoser § Articles in english § sysadmin ‡ Comments (1) ° Tagged: , , , , ,