ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format

Question

I am developing a Sencha touch 2 application. I have been following the "Styling the user interface of a Sencha Touch application" tutorial on theming of secha touch applications.

It requires me to install Ruby, Compass and SASS. I installed Ruby using the installer from rubyinstaller.org.

On executing the following command, I get the expected result which confirms correct installation:

C:\>ruby -v

ruby 1.9.3p327 (2012-11-10) [i386-mingw32]

Current source is up to date:

C:\>gem sources

** CURRENT SOURCES **

http://rubygems.org/

Next, since I am behind a proxy, I used the following command to install HAML/Compass:

C:\>gem install -p [proxy:port] compass

ERROR:  While executing gem ... (Zlib::GzipFile::Error)
not in gzip format**

Can someone help me? I found solutions such as system update, gem sources update, but everything is up to date on my system.

---

Edit:

C:\>gem install compass

works perfectly fine on my private system. When I try the same command from my workplace I need to use the proxy as mentioned above and that results in an error.

Answer 1

I assume the ERROR occurs since the web sense at my workplace blocks these downloads.

Solution: I downloaded the required gems: chunky_png, fssm, compass, sass, haml etc.. directly from http://rubygems.org/gems and placed these gems in my local directory.

After this I tried gem install compass. This first searches your local directory. On finding the required gems, installation takes place. Does not require connection to the ruby website.

Note: Run the command from the path where the gems are located

eg: I have placed the gems in C:\Ruby193\lib\ruby\gems\1.9.1\gems

So I run the following command :

C:\Ruby193\lib\ruby\gems\1.9.1\gems>gem install compass

Answer 2

I had a similar problem, it worked on my own private laptop, but failed while using a virtual server at work (running Ubuntu 12.10) that used a proxy.

Following the suggestion I found here, from the command line I defined:

export HTTPS_PROXY=proxy-address:proxy-port-number

export HTTP_PROXY=proxy-address:proxy-port-number

and then my gem install package worked fine.