Download script (compare.py)

The usage is simple:

Usage: compare.py [-d] dir1 dir2
Compares files in two directories, based on their MD5 checksum.
-d: Debug. Prints the MD5 checksum of every file to stderr.

Sample usage and output:

% python compare.py dir1 dir2
Duplicate files
============================================================

dir1/file 2.pdf
dir1/file.pdf

Common files
============================================================

dir1/image.png
dir2/image.png

dir1/test.pdf
dir2/subdir/foobar.pdf

Files only in dir1
============================================================

dir1/hello.jpg

Files only in dir2
============================================================

dir2/something.jpg
dir2/video.mov

Now, let’s see what they did in Firefox 3 (Beta 1):

The website will not be displayed and there’s only a small link at the bottom (which most people won’t see). Clicking this unfriendly link requires you to confirm two additional questions and maybe do additional settings. In short, most people won’t be able to access your site at all.

So what are possible consequences of this change for private websites?

• They will stop using SSL. That’s the easiest way. Who cares about encryption? The user won’t notice anyway.
• They will use a certificate from http://cert.startcom.org/, which is the only certificate issuer I know which should not display this nasty error message. Unfortunately, if you want wildcards (i.e. make the certificate valid for all your subdomains), you still need to pay for a “Class 2″ certificate (http://www.startssl.com/), and most providers don’t give you enough IP addresses, but that’s another issue. So there’s no free solution for wildcard domains.

What could be done to avoid this problem?

• In my opinion, encryption and trust should be separated. It is more secure to visit a website which has encryption enabled than any other website without encryption. Ideally, every website would be transferred encrypted. If someone wants trust, i.e. allow people to see that your server is really your server, then he or she could buy a certificate. In the end, you can’t really trust any website (what, if the server has been compromised?), but encryption is always a good thing (your provider or your network administrator can’t read the data).
• CAcert should be included in mainstream browsers, which unfortunately doesn’t seem to be the case, not even in Firefox.
• There should be more free certificate issuers. You shouldn’t have to pay for encryption (or trust).

What’s your opinion about this topic?

You can really feel the difference when working with both systems.

Found via digg.

But the newforms library works only for static forms. Forms that have a fixed number of fields. What I wanted to do, is create a page that allows you to edit multiple instances of a model at once. It should be similar to edit_inline, but there should be a JavaScript link that allows you to add another instance of the object.

That's why I have written classes that make it possible to handle this type of forms using Django. No AJAX is utilized to make this work.

What will it look like?

Getting started

Note: This howto won't work on Django 0.95. You need a recent SVN checkout of Django (I was using revision 4389).

I created a Python and JavaScript file that make it pretty easy to create dynamic forms. To be able to use my samples, you will have to download them and put the Python file into your application directory and the JavaScript file into your media directory:

• dynamicforms.py
• dynamicforms.js

Now let me show you have to use dynamicforms. Let's start with a simple model (models.py):

Now the view (views.py). I'll first import some stuff and create a form:

Note that I specified the template that will be used to render the form and the core fields, in this example title. Core fields are required to be able to add new elements.

The form template (form.html) itself is simple:

Feel free to style your form as you want. There are no restrictions.

Now let me add the actual view (views.py):

If there's no POST data, the form will be initialized with a list of rendered forms that are JavaScript-ready. I am passing the page's ID to make it easy to save the objects later. There's also a dummy-form that will be used for adding new objects (page_template). Note that render_js('from_template') uses the from_template function which I implemented and renders the form using the given template. You can also pass the template name via the constructor of the form. Instead of form_template, you can also use e.g. as_p.

When posting the form, a list (FormCollection) of posted forms is returned via the get_forms classmethod. We are again preparing the page_data in case the forms don't validate. If the forms are valid, their IDs and their cleaned data will be printed. This example doesn't save anything, but I'll show you later how to use the built-in form_for_instance method to save the objects.

Here's the template of the edit page (edit.html):

Note that I am using the mootools JavaScript library, because it already implements stuff like class inheritance (you will need to enable Window.Base and it's dependencies when downloading mootools). You can rewrite the JavaScript code if you use another JavaScript library.

The PageForm JavaScript class uses the page_template to add a new form if no values are specified. Forms with existing data will be created in the Window.onDomReady function.

Another example using form_for_model and form_for_instance

Here's a working view (views.py) that let's you add and edit Page objects without using the manually created PageForm:

You have to specify dynamicforms.BaseForm in form_for_model, because Django requires a BaseForm. Saving objects is as easy as calling form.save(). For updating objects I had to create another form_for_instance and pass the page's id.

Comments?

Have a lot of fun using dynamicforms and please leave a comment on this page if you like (or don't) dynamicforms or if you have suggestions.

Update (February 18th): Improved get_forms() in dynamicforms.py to allow deletion of objects (now there are no premature breaks when a form is missing).

Update (May 6th): Improved dynamicforms.js to prevent data loss when storing the template in a variable and creating multiple objects at once.

Update (August 4th): Changed clean_data to cleaned_data, improved dynamicforms.js (unicode, from_template takes now an optional extra_context argument)

Here is what I came up with:

The cooler is connected to the PC and is standing on the legs of a Netgear WLAN router.

My RSS-Reader Dashboard Widget for Mac OS X is now a Universal Binary and should run on Intel Macs. Because I don't own an Intel Mac yet, contact me if it does not work correctly.

It also supports automatic reloading of the feed and scrolling using the mouse scroller and keyboard arrows (Thanks to Nicolas Weber or implementing scrolling).

Voraussetzung für das Setup sind ein Telefonanschluss bei GGAdigiPhone und natürlich Programmier- und Bastelkenntnisse...

Die Installation und alle benötigten Scripts finden sich in meinem Telefonie-Text.

Vielleicht kann dies ja jemand auf ein Setup mit analogem Telefonanschluss (und Modem im Computer) portieren?

Habe diese Tricks noch nicht ausprobiert, vermutlich werden sie in der Schweiz nicht funktionieren.

Hat jemand Erfahrung mit dem "Hacken" von Aufzügen in der Schweiz?

Das Paket ist mit einem Mediatrix 1102 IP-Telefonie-Gerät gekommen, den man zwischen Kabelmodem und PC anschliesst. An diese Box schliesst man dann das eigentliche Telefon per RJ11 an.

Ich habe einen Text geschrieben, der erläutert, wie man die Box auch hinter einem Linux-Server mit NAT zum Laufen bringt.