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Sprint Mobile Broadband / EVDO Image Compression Solution

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sdphotog
EVDO Fledgling


Joined: 22 Oct 2005
Posts: 23

PostPosted: Sun Oct 23, 2005 4:21 pm    Post subject: Sprint Mobile Broadband / EVDO Image Compression Solution Reply with quote

After doing a little research into the problem, I have found a solution to get around Sprint's proxy server compressing images. I noticed that my Treo's web browser, Blazer, receives uncompressed images. I captured Blazer's user-agent information and realized that the proxy server doesn't compress images going to that browser. So, I added "Blazer/4.0" to the end of FireFox's user-agent string, and now Firefox receives uncompressed images and HTML.

Original FireFox user-agent:
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

Modified FireFox user-agent:
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0; Blazer/4.0

Here's a link on how to change the user agent in firefox:
http://johnbokma.com/mexit/2004/04/24/changinguseragent.html

You could also use a user-agent plugin to change between the normal and modified user agents. I found one plugin called "User Agent Switcher"

I also was also able to change the user agent for Safari, but it required modifying the actual binary application file. I'm sure changing the user agent in any other Mac/PC browser will have the same results.

So far, every site i have visited comes up properly. Google comes up as the "PDA" version, but if you click on the "Preferences" link, you can change the default back to "HTML"

Enjoy!

UPDATE: Here's how to change the user agent in Safari:

First, make a copy of your Safari Application. I renamed my copy to "Safari Wireless." Then control-click or right click and show the package contents. Inside the "Contents" folder, open the file "Info.plist". I used TextEdit, which worked fine. Almost at the end of the file, you'll find this block of strings:

Code:

</array>
   <key>CFBundleVersion</key>
   <string>412.5</string>
   <key>LSMinimumSystemVersion</key>
   <string>10.3.0</string>
   <key>NSAppleScriptEnabled</key>
   <string>Yes</string>
   <key>NSMainNibFile</key>
   <string>MainMenu</string>
   <key>NSPrincipalClass</key>
   <string>BrowserApplication</string>
   <key>NSServices</key>
   <array>


You'll want to go to the "412.5" number and add ";Blazer/4.0" to the end of it. Depending on which version of Safari you're using, that 412.5 number might be different. So, once you're done, your new string should look like this:

Code:

<string>412.5; Blazer/4.0</string>


Close and save the file, and you should now how a version of Safari that loads uncompressed HTML and graphics. You could probably just make this change to your original Safari program, but I don't know if some website or program will be confused with something after the 412.5. But, I haven't had and problems yet.


Last edited by sdphotog on Mon Oct 24, 2005 12:26 pm; edited 2 times in total
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Michael
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Joined: 13 Jan 2005
Posts: 6208
Location: Cary, IL

PostPosted: Sun Oct 23, 2005 4:30 pm    Post subject: Reply with quote

GREAT POST!

This info is what these forums are all about.

Thanks!
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niteLite
EVDO Newbie


Joined: 20 Oct 2005
Posts: 4
Location: philadelphia

PostPosted: Sun Oct 23, 2005 11:36 pm    Post subject: Reply with quote

THE best post i have read on here in a while, you rock. Mr. Green
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olywogle
EVDO Newbie


Joined: 23 Oct 2005
Posts: 1

PostPosted: Mon Oct 24, 2005 12:09 am    Post subject: YOU ROCK INDEED Reply with quote

The image compression issue was the only factor till this thread was posted. I was considering return my sprint EVDO card until now. The originator of this thread just made a whole lot of sprint EVDO users very happy!!! Thanks man, you deserve some sort of "most useful thread" award for this.
Oly
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SL10
EVDO Junkie


Joined: 18 Sep 2005
Posts: 394
Location: Denver, Colorado

PostPosted: Mon Oct 24, 2005 1:53 am    Post subject: Reply with quote

Great post. Thanks for sharing. Smile
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Michael
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Joined: 13 Jan 2005
Posts: 6208
Location: Cary, IL

PostPosted: Mon Oct 24, 2005 7:21 am    Post subject: Reply with quote

I have made this post a sticky, so it will remain near the top of the list.
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RyanFlynn
EVDO Newbie


Joined: 03 Nov 2005
Posts: 1

PostPosted: Sat Nov 05, 2005 7:47 pm    Post subject: worked for me just fine. Reply with quote

Worked fantastic for me. I just wish I had though of it myself. Smile

Thank you for the insight!

Ryan
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jmyeosf
EVDO Newbie


Joined: 11 Nov 2005
Posts: 5

PostPosted: Fri Nov 18, 2005 1:04 am    Post subject: Reply with quote

Worked great for most part, on Safari. It doesn't work well when trying to log on to my Sprint account on sprint.com. Is it something that I did different?
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gbl
EVDO Newbie


Joined: 01 Dec 2005
Posts: 7
Location: LA (near Venice & Overland)

PostPosted: Mon Dec 05, 2005 12:11 pm    Post subject: Michael, thanks for pointing me in the right direction Reply with quote

Is there a fix for Internet Explorer?
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kaefer
EVDO User


Joined: 05 Dec 2005
Posts: 66

PostPosted: Mon Dec 05, 2005 3:38 pm    Post subject: Reply with quote

I did this mod last week in Firefox and it worked great. However it seems this week that I'm seeing addition picture compression (though not as bad as in IE).

Has anyone else noticed this or is it just my system?

Thanks,
-Kaefer
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benjaminhigginbotham
EVDO Newbie


Joined: 17 Dec 2005
Posts: 1

PostPosted: Sun Dec 18, 2005 12:42 am    Post subject: Reply with quote

I created a post on this topic over at my blog, TechnologyEvangelist.com. Basically, here's what I found in IE to make it work:

Open your Registry Editor (START->RUN regedit)
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent.
From here you’ll want to enter 3 new strings / values:
Compatible / compatible
Platform / Windows NT 5.0
Version / MSIE 5.5; Blazer/4.0

While I won't require you to go to our blog, I would appreciate the traffic and any comments you may have. Hopefully this hack will work for you as it did for me.
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Michael
Site Admin


Joined: 13 Jan 2005
Posts: 6208
Location: Cary, IL

PostPosted: Sun Dec 18, 2005 5:06 pm    Post subject: Reply with quote

Ben,

Thanks for posting that info, this will help many users get around the Sprint Compression problem.
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gmaltais
EVDO Newbie


Joined: 27 Dec 2005
Posts: 1

PostPosted: Tue Dec 27, 2005 1:25 pm    Post subject: Blazer/4.0 Reply with quote

I have one quick question about this issue resolution.

Do we not need to install Blazer on our Lap Tops in order to get this hack to work?

I added the strings in both the FF user string and my Registry to no resolve. I am wondering how the browsers would recognize the settings for another browser if it is not installed on the laptop itself.

I am using a Sprint Aircard 580

Thanks in advance...

Guy
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Chuck
EVDO Heavy User


Joined: 21 Mar 2005
Posts: 149

PostPosted: Wed Jan 04, 2006 6:20 pm    Post subject: Reply with quote

If you don't see an option to see an uncompressed photo then this is not happening correct?
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Michael
Site Admin


Joined: 13 Jan 2005
Posts: 6208
Location: Cary, IL

PostPosted: Wed Jan 04, 2006 11:01 pm    Post subject: Reply with quote

Correct, unless you have JavaScript disabled.

The easy way to tell if the image/page is compressed, look at the source code of the HTML page:

- all white space is removed (there are no carriage returns)
- a JavaScript is automatically inserted in the HTML (to reload the images - even if the page normally doesn't have a JavaScript)
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