[webkit-dev] Desperate for webkit help
ddkilzer at webkit.org
Tue Apr 15 16:21:17 PDT 2008
The issue appears to be that when WebKit sent a multipart/form-data boundary
with a "+" character in it, the server-side software wouldn't decode the
request properly. (When there was no "+" character in the form boundary,
everything worked fine.)
Mark didn't say what software he was using on the server side to decode the
HTML form data, but it probably requires a simple update to fix the issue.
Mark <hoicem at googlemail.com> wrote:
> Hi guys, many thanks for your advice. I'll check out the wireshark thing for
> sure. In the meantime I have managed to cobble together a demo so you can
> see hopefully the bug:
> Please go here: http://demo.jmbsoft.com/cgi-bin/ags/submit.cgi
> Enter the following information:
> Username, Password: Leave Blank
> Name:, Nickname: Whatever
> Email: something at validemailaddress.com
> Description: Enter a 30-40 character string wwerewr ewr
> Gallery URL: http://www.intotheflood.com/webkit-demo/index.html
> Category: Leave as is
> Number of Thumbs: 12
> Preview Thumb: choose "Let the script select an image from your gallery"
> Now hit submit, it will either throw up a success(submission recorded) or
> invalid message. If you get success, hit back on your browser, webkit should
> remember all the information you entered, submit again and again and
> eventually you should land upon an "invalid URL" or "Invalid email"
> I'd be really interested to know if this does indeed happen for you! You may
> need to submit a lot of times before you get the error, or you may get it
> straight away.
> many thanks
> On Sat, Apr 12, 2008 at 1:37 AM, David Kilzer <ddkilzer at webkit.org> wrote:
> > Hi Mark,
> > The best thing you could do is to file a bug on <
> > https://bugreport.apple.com/>
> > and attach source for a project that reproduces the issue, along with
> > details
> > steps to reproduce the issue. If you don't have an Apple Developer
> > Connection
> > (ADC) membership, sign up for a free "online" membership using
> > <https://connect.apple.com/>.
> > The second thing you should do is to install Wireshark (a packet sniffer)
> > on OS
> > X and use it to capture the traffic being sent back and forth to the
> > server
> > when the bug occurs. (Since this generally requires either GTK built for
> > Cocoa
> > or X11 to be installed--and using MacPorts or Fink to build it from
> > source--it
> > may be easier to capture the traffic using "tcpdump" and copying that file
> > to
> > another platform where you may install a pre-built Wireshark binary.
> > Hmm...I
> > guess there is a Wireshark binary for Intel Macs linked off the Downloads
> > page
> > now.)
> > http://www.wireshark.org/
> > http://www.macports.org/
> > http://fink.sourceforge.net/
> > I would recommend attaching the tcpdump output to the bug created on
> > bugreport.apple.com as well. This is roughly the command you want to run
> > (from
> > a Terminal) to capture the output on OS X if you don't use Wireshark
> > directly:
> > sudo tcpdump -s 0 -w packets.tcpdump -i en0
> > Finally, this kind of sounds like the issue described in this bug on
> > bugs.webkit.org:
> > https://bugs.webkit.org/show_bug.cgi?id=5760#c38
> > If you know enough about the TCP/IP protcol, you should be able to see
> > this
> > issue happening with the tcpdump packet trace.
> > Note that the behavior of this keep-alive timeout issue can vary depending
> > on
> > how "far away" the server is from your client. I think servers on a local
> > network (or subnet) display this behavior much easier than hitting a
> > "remote"
> > server.
> > Hope that helps!
> > Dave
> > Mark <hoicem at googlemail.com> wrote:
> > > Hi. I've been developing a cocoa application based around webkit for the
> > > last 18 months. It's an auto form filling/submitting tool primarily
> > designed
> > > for adult webmasters to submit their free pages to link lists. (If this
> > is
> > > an problem I guess you can stop reading now)...
> > > Currently development has grinded to a complete hault because of a
> > webkit
> > > issue that we just can't work round. We first noticed the issue with the
> > > release of Safari 3 but it still exists in the last nightly build of
> > webkit.
> > > The issue is this: imagine a simple html form. The form is like so and
> > the
> > > user filled data is in brackets:
> > >
> > > Name: (mark)
> > > Email: (whatever at qwerty123456.com)
> > > Url: (http://www.google.com)
> > >
> > > Now if we submit this form in Safari/Webkit, 40-50% of the time the web
> > > script will throw up an 'invalid email' or 'invalid url' message. At
> > first
> > > you think 'oh, I must have entered data incorrectly' but clicking back,
> > data
> > > looks fine. Submit same data again, second time round it submits fine!
> > >
> > > It seems to happen totally at random, it's like the data visible in the
> > form
> > > fields (ie, the user entered data) is not being passed onto the form
> > when
> > > submit is pressed. It worked fine prior to safari 3 and we know it's a
> > > webkit issue because it only occurs in our app/safari/webkit. Other
> > browsers
> > > submit the same data perfectly each time to the exact same html forms.
> > >
> > > It's very hard to nail down. Sometimes it will submit fine first time,
> > > sometimes if it fails first time, it can fail second time and then
> > succeed
> > > third time. You just have to keep submitting the same data until it
> > works.
> > >
> > > Can anyone please help with this? It's kinda killed our application and
> > as
> > > the title suggests I'm *desperate* for it to be fixed.
> > >
> > > kindest regards
> > >
> > > mark
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