Wireless Application Protocol and the mobile web before the web

Table of contents

  1. A little stroll down the history lane
  2. WAP - Wireless Application Protocol
  3. WML - Wireless Markup Language
  4. Converting Digg to WML
  5. Conclusion

A little stroll down the history lane

About two weeks ago, I watched this outstanding documentary on YouTube Springboard: the secret history of the first real smartphone about the history of smartphones and phones in general. It brought back so many memories. I never had an actual smartphone before the Android. The closest to smartphone was Sony Ericsson P1. A fantastic phone and I broke it in Prague after a party and that was one of those rare occasions where I was actually mad at myself. But nevertheless, after that phone, the next one was an Android one.

Before that, I only owned normal phones from Nokia and Siemens etc. Nothing special, actually. These are the phones we are talking about. Before 2007. Apple and Android phones didn’t exist yet.

These phones were rocking:

  • No selfie cameras.
  • ~2 inch displays.
  • ~120 MHz beast CPU’s.
  • 144p main cameras.
  • But they had a headphone jack.

Let’s take a look at these beauties.

Old phones

WAP - Wireless Application Protocol

Not that one! We are talking about Wireless Application Protocol and not Cardi B’s song 😃

WAP stands for Wireless Application Protocol. It is a protocol designed for micro-browsers, and it enables the access of internet in the mobile devices. It uses the mark-up language WML (Wireless Markup Language and not HTML), WML is defined as XML 1.0 application. Furthermore, it enables creating web applications for mobile devices. In 1998, WAP Forum was founded by Ericson, Motorola, Nokia and Unwired Planet whose aim was to standardize the various wireless technologies via protocols. (source)

WAP protocol was resulted by the joint efforts of the various members of WAP Forum. In 2002, WAP forum was merged with various other forums of the industry, resulting in the formation of Open Mobile Alliance (OMA). (source)

These were some wild times. Devices had tiny screens and data transmission rates were abominable. But they were capable of rendering WML (Wireless Markup Language). This was very similar to HTML, actually. It is a markup language, after all.

These pages could be served by Apache and could be generated by CGI scripts on the backend. The only difference was the limited markup language.

WML - Wireless Markup Language

Just like web browsers use HTML for content structure, older mobile device browsers use WML - if you need to support really old mobile phones using WML browsers, you will need to know about it. WML is XML-based (an XML vocabulary just like XHTML and MathML, but not HTML) and does not use the same metaphor as HTML. HTML is a single document with some metadata packed away in the head, and a body encapsulating the visible page. With WML, the metaphor does not envisage a page, but rather a deck of cards. A WML file might have several pages or cards contained within it. (source)

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
  <card id="home" title="Example Homepage">
    <p>Welcome to the Example homepage</p>
  </card>
</wml>

There is an amazing tutorial on Tutorialpoint about WML.

Converting Digg to WML

This task is completely useless and not really feasible nowadays, but I had to give it a try for old-time sake. Since the data is already there in a form of RSS feed, I could take this feed and parse it and create a WML version of the homepage.

We will need:

  • Python3 + Pip
  • ImageMagick
  • feedparser and mako templating
# for fedora 35
sudo dnf install ImageMagick python3-pip

# tempalting engine for python
pip install mako --user

# for parsing rss feeds
pip install feedparser --user

Project folder structure should look like the following.

12:43:53 m@khan wap → tree -L 1
.
├── generate.py
└── template.wml

After that, I created a small template for the homepage.

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.2//EN" "http://www.wapforum.org/DTD/wml_1.2.xml">

<wml>

  <card title="Digg - What the Internet is talking about right now">

    % for item in entries:
      <p><img src="/images/${item.id}.jpg" width="175" height="95" alt="${item.title}" /></p>
      <p><small>${item.kicker}</small></p>
      <p><big><b>${item.title}</b></big></p>
      <p>${item.description}</p>
    % endfor

  </card>

</wml>

And the parser that parses RSS feed looks like this.

import os
import feedparser
from mako.template import Template

os.system('mkdir -p www/images')

template = Template(filename='template.wml')

feed = feedparser.parse('https://digg.com/rss/top.xml')

entries = feed.entries[:15]

for entry in entries:
  print('Processing image with id {}'.format(entry.id))
  os.system('wget -q -O www/images/{}.jpg "{}"'.format(entry.id, entry.links[1].href))
  os.system('convert www/images/{}.jpg -type Grayscale -resize 175x -depth 3 -quality 30 www/images/{}.jpg'.format(entry.id, entry.id))

html = template.render(entries = entries)

with open('www/index.wml', 'w+') as fp:
  fp.write(html)

This script will create a folder www and in the folder www/images for storing resized images.

Be sure you don’t use SSL and use just normal HTTP for serving the content. These old phones will have problems with TLS 1.3 etc.

If you look at the python file, I convert all the images into tiny B&W images. They should be WBMP (Wireless BitMaP) but I choose JPEGs for this, and it seems to work properly.

Because I currently don’t have a phone old enough to test it on, I used an emulator. And it was really hard to find one. I found WAP Proof on shareware junction, and it did the job well enough. I will try to find and actual device to test it on.

If you are using Nginx to serve the contents, add a directive to the hosts file that will automatically server index.wml file.

server {
  index index.wml index.html index.htm index.nginx-debian.html;
}

Conclusion

Well, this was pointless, but very fun! You can give it a try on digg.mitjafelicijan.com but make sure you are using a browser or old emulator that supports WML.


Leave a comment

You can write me an email at m@mitjafelicijan.com or comment bellow.


Read more from this site


Articles from blogs I follow around the net

Generated with openring.