[Instantrails-users] What could be causing this BAD CLIENT error?

Dave Havard david.havard at gmail.com
Wed Oct 11 06:28:46 EDT 2006


Hi Curt

Ok, I have now tested from another windows box running IE (same version) and
all works fine. Have also tested from my SUSE10.1 box running FF (same
version) and both work fine. Strangley IE is now working on my development
box (XP) today - not sure if changed something or just got confused in the
battle yesterday!? Anyway now it is just FF not working.

I have tried uninstalling each extension but none had an effect, also tried
reinstalling FF but still no change.

Any suggestions on what to try next?

Thanks
Dave

On 11/10/06, Curt Hibbs <curt.hibbs at gmail.com> wrote:
>
> Zed, I've copied a thread from the Instant Rais mailing list below. Could
> you take a quick look and see if you have any idea what might be going on
> here?
>
> Thanks
> Curt
>
> *[Instantrails-users] Mongrel BAD CLIENT errors *
> 6 messages
> ------------------------------
>   * Dave Havard <david.havard at gmail.com> *  * Mon, Oct 9, 2006 at 3:46 PM
> *   Reply-To: instantrails-users at rubyforge.org
>  To: instantrails-users at rubyforge.org
>    Hi
>
> I have just installed InstantRails and (after some work) have got my
> existing app working. I am now getting BAD CLIENT errors on some form posts
> but have no idea why. Having looked at the mongrel docs it seems I should be
> able to get to the bottom of this if I can get debug set to true but I
> cannot see where to do this in InstantRails?
>
> Any pointers?
>
> Thanks
> Dave
>
> _______________________________________________
> Instantrails-users mailing list
> Instantrails-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/instantrails-users
>
>  ------------------------------
>   * Curt Hibbs <curt.hibbs at gmail.com> *  * Mon, Oct 9, 2006 at 10:51 PM *  Reply-To:
> curt at hibbs.com
>  To: instantrails-users at rubyforge.org
>    On 10/9/06, Dave Havard <david.havard at gmail.com > wrote:
> >
> > Hi
> >
> > I have just installed InstantRails and (after some work) have got my
> > existing app working. I am now getting BAD CLIENT errors on some form posts
> > but have no idea why. Having looked at the mongrel docs it seems I should be
> > able to get to the bottom of this if I can get debug set to true but I
> > cannot see where to do this in InstantRails?
> >
> > Any pointers?
> >
>
> You'll need to start mongrel by hand. Use Instant Rails to open a ruby
> console window (menu command "Rails Applications>Open Ruby Console Window"),
> change your current directory to move in to your Rails application's root
> directory, and then type in the "mongrel_rails" command with whatever
> options you like.
>
> Curt
>   ------------------------------
>   * Dave Havard <david.havard at gmail.com> *  * Tue, Oct 10, 2006 at 4:39 AM
> *   To: curt at hibbs.com, instantrails-users at rubyforge.org
>    Thank you Curt.
>
> That has got debugging working but has made things no clearer on why some
> of my form posts are not working. The post does not seem to get logged -
> only reported as a bad client to the console window. Any ideas what I should
> be looking for? My view contains the following code:
>
> <% @title = "Sign up" %>
> <%= error_messages_for 'user' %>
> <%= form_tag %>
> <table>
>     <tr>
>         <td>Username:</td>
>         <td><%= text_field("user", "username") %></td>
>     </tr>
>     <tr>
>         <td>Password:</td>
>         <td><%= password_field("user", "password") %></td>
>     </tr>
>     <tr>
>         <td>Confirm Password:</td>
>         <td><%= password_field("user", "confirm_password") %></td>
>     </tr>
>     <tr>
>         <td>Email Address:</td>
>         <td><%= text_field("user", "email") %></td>
>     <tr>
>         <td>First Name:</td>
>         <td><%= text_field("user", "first_name") %></td>
>     </tr>
>     <tr>
>         <td>Last Name:</td>
>         <td><%= text_field("user", "last_name") %></td>
>     </tr>
>     <tr>
>         <td>Screen Name:</td>
>         <td><%= text_field("user", "screen_name") %></td>
>     </tr>
>     <tr>
>         <td></td>
>         <td><input type="submit" value="Sign up"/></td>
>     </tr>
> </table>
> <%= end_form_tag %>
>
> Whilst my controller looks like:
>
>   def signup
>     if request.get?
>       @user = User.new
>     else
>       if params[:user][:password] != params[:user][:confirm_password]
>         flash[:notice] = "Passwords do not match!"
>       else
>         @user = User.new(params[:user])
>         if @user.save
>           session[:user] = @user.id
>           redirect_to :controller => "pages", :action => "show", :id => 1
>         end
>       end
>     end
>   end
>
> The get part of the view is being rendered fine. Only when I post back is
> it failing.
>
> Thanks
> Dave
>
>  On 10/10/06, Curt Hibbs <curt.hibbs at gmail.com> wrote:
> >
> >  On 10/9/06, Dave Havard < david.havard at gmail.com > wrote:
> > >
> > > Hi
> > >
> > > I have just installed InstantRails and (after some work) have got my
> > > existing app working. I am now getting BAD CLIENT errors on some form posts
> > > but have no idea why. Having looked at the mongrel docs it seems I should be
> > > able to get to the bottom of this if I can get debug set to true but I
> > > cannot see where to do this in InstantRails?
> > >
> > > Any pointers?
> > >
> >
> > You'll need to start mongrel by hand. Use Instant Rails to open a ruby
> > console window (menu command "Rails Applications>Open Ruby Console Window"),
> > change your current directory to move in to your Rails application's root
> > directory, and then type in the "mongrel_rails" command with whatever
> > options you like.
> >
> > Curt
> >
> > _______________________________________________
> > Instantrails-users mailing list
> > Instantrails-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/instantrails-users
> >
> >
>   ------------------------------
>   * David Morton <mortonda at dgrmm.net> *  * Tue, Oct 10, 2006 at 9:38 AM *   To:
> instantrails-users at rubyforge.org
>  Cc: curt at hibbs.com
>    -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Dave Havard wrote:
> > Thank you Curt.
> >
> > That has got debugging working but has made things no clearer on why
> > some of my form posts are not working. The post does not seem to get
> > logged - only reported as a bad client to the console window. Any ideas
> > what I should be looking for? My view contains the following code:
>
>
> According to http://mongrel.rubyforge.org/faq.html, a BAD CLIENT error
> means the
> web browser sent an invalid HTTP request; it has nothing to do with rails.
>
> What browser are you using?
>
> - From that FAQ:
>
> What does BAD CLIENT mean?
>
> It means that a request came in which Mongrel rejects because it doesn?t
> follow
> the RFC grammar. Mongrel is pretty relaxed about most requests, but in
> order to
> block the majority of security attacks for web servers it is strict about
> characters used, header formats, status line formats, etc. This is also
> based on
> matching the RFC?s grammar specification to a Ragel grammar specification,
> so
> it?s easy to compare.
>
> If you need to know why the client is triggering this, then simply hit
> your
> Mongrel processes with USR1 signals and they?ll log the full request data
> and
> parameters that were collected. Then, if you think the request is valid
> send me
> this data and I?ll look. If it?s not valid than fix the client.
>
> Mongrel takes the stance that all clients are written by software
> developers and
> that they should follow the standard. By doing this it reduces the bugs
> and
> potential security holes found in many other web servers. It also means
> that if
> you absolutely have to allow a bad client, then you?ll need to not use
> Mongrel.
>
>
>
>
> - --
> David Morton
> Maia Mailguard                        - http://www.maiamailguard.com
> Morton Software Design and Consulting - http://www.dgrmm.net
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>  ------------------------------
>   * David Morton <mortonda at dgrmm.net> *  * Tue, Oct 10, 2006 at 2:01 PM *  To:
> instantrails-users at rubyforge.org
>  Cc: curt at hibbs.com
>    -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> On Oct 10, 2006, at 9:38 AM, David Morton wrote:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Dave Havard wrote:
> >> Thank you Curt.
> >>
> >> That has got debugging working but has made things no clearer on why
> >> some of my form posts are not working. The post does not seem to get
> >> logged - only reported as a bad client to the console window. Any
> >> ideas
> >> what I should be looking for? My view contains the following code:
> >
> >
> > According to http://mongrel.rubyforge.org/faq.html, a BAD CLIENT
> > error means the
> > web browser sent an invalid HTTP request; it has nothing to do with
> > rails.
>
> actually, now that I think about it, perhaps a request has a bad
> character in it, or isn't properly url encoded?
>
>
>
> David Morton
> Maia Mailguard http://www.maiamailguard.com
> mortonda at dgrmm.net
>
>
>
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>  ------------------------------
>  * Dave Havard <david.havard at gmail.com> *  * Tue, Oct 10, 2006 at 6:16 PM
> *   Reply-To: instantrails-users at rubyforge.org
>  To: instantrails-users at rubyforge.org
>    Thanks David
>
> So are they saying that mongrel will fail if the browser is not right? I
> am testing on IE6.0.29 and FF1.5. Would be surprised if mongrel does not
> work with these browsers - how could it be used in production?
>
> Have you heard about this problem much? Seems like mongrel is become the
> server of choice for rails, but even the scaffold code is failing - can't
> believe it is rails or this issue would be plastered all over the net by
> now. At the same time a web server which will not work with FF1.5 seem
> unrealistic.
>
> Could it be something else? Maybe apache is changing something before
> passing the request to mongrel?
>
> Given InstantRails is installing elsewhere without fuss i'll test on some
> more machines...
>
> Thanks for your help.
> Dave
>
>
>
> On 10/10/06, David Morton < mortonda at dgrmm.net> wrote:
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> >
> > On Oct 10, 2006, at 9:38 AM, David Morton wrote:
> >
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > Dave Havard wrote:
> > >> Thank you Curt.
> > >>
> > >> That has got debugging working but has made things no clearer on why
> > >> some of my form posts are not working. The post does not seem to get
> > >> logged - only reported as a bad client to the console window. Any
> > >> ideas
> > >> what I should be looking for? My view contains the following code:
> > >
> > >
> > > According to http://mongrel.rubyforge.org/faq.html, a BAD CLIENT
> > > error means the
> > > web browser sent an invalid HTTP request; it has nothing to do with
> > > rails.
> >
> > actually, now that I think about it, perhaps a request has a bad
> > character in it, or isn't properly url encoded?
> >
> >
> >
> > David Morton
> > Maia Mailguard http://www.maiamailguard.com
> > mortonda at dgrmm.net
> >
> >
> >
>
> _______________________________________________
> Instantrails-users mailing list
> Instantrails-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/instantrails-users
>
>
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