Hi There,
I have a small ASP.NET application under development. I am using VS.NET 2002
(2003 upgrade is on the way) with .NET Framework 1.1. It is hosted on a web
hosting service in the US. I am experiencing the "Viewstate corrupted" error
message on a particular page, when that page is left for a period of time
and I return to it again, and submit it again. The page in question has a
drop-down list of various RSS news feeds I am interested in, so I'll often
look at a set of news articles, read one and return to my page and choose
another RSS feed.
I have been informed by my web hosting organisation that the problem is
caused by "worker process recycling". That is, to minimise resources after a
period of inactivity, the worker process servicing requests for my web site
is
re-used.
Does this sound plausible? Many of the other explanations regarding
synchronised machine keys in machine.config files sound much more likely to
me.
Also, even if this were the case, why would the servicing of a subsequent
request by a different worker process consider the client-side persisted
viewstate to be corrupt? That's the bit I just don't understand.
Any help or suggestions would be greatly appreciated.
Regards,
Trevor Andrew 3 2827
Hi Justin,
Thanks for that ... I understand that viewstate is encoded, and the bits
that are persisted on the server side are the machine keys to perform this
encoding. But isn't that all that is persisted server side? Surely none of
the web form related viewstate data is persisted server side?
Regards,
Trevor Andrew
"S. Justin Gengo" <sj*****@aboutf ortunate.com> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. I don't believe the entire view state is persisted. But part of the view state is persisted server side. Let me see if I can explain this
clearly... For security reasons the view state is encoded. Part of the encoding
process is kept server side and is used to compare a submitted view state with the part kept on the server. This makes it very difficult for someone to impersonate a page post back sending false data in the viewstate.
-- S. Justin Gengo, MCP Web Developer
Free code library at: www.aboutfortunate.com
"Out of chaos comes order." Nietzche "Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:eT******** ********@tk2msf tngp13.phx.gbl. .. Hi There,
By way of further clarification, I have been told by my web hosting company that:
a. Viewstate IS persisted on the server, and hence this is where the problem arises. b. This is only an issue with Windows 2003, which they are now running. c. There is no way to stop ASP.NET persisting a copy of viewstate on the server.
Not wishing to sound sceptical, but points a) and c) above really puzzle me. I thought that Viewstate (as opposed to session state) was most
definitely only a client side form of persistence. Can someone confirm one way or
the other?
Regards, Trevor Andrew
"Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. Hi There,
I have a small ASP.NET application under development. I am using
VS.NET 2002 (2003 upgrade is on the way) with .NET Framework 1.1. It is hosted on
a web hosting service in the US. I am experiencing the "Viewstate corrupted" error message on a particular page, when that page is left for a period of time and I return to it again, and submit it again. The page in question
has a drop-down list of various RSS news feeds I am interested in, so I'll often look at a set of news articles, read one and return to my page and choose another RSS feed.
I have been informed by my web hosting organisation that the problem
is caused by "worker process recycling". That is, to minimise resources
after a period of inactivity, the worker process servicing requests for my web site is re-used.
Does this sound plausible? Many of the other explanations regarding synchronised machine keys in machine.config files sound much more
likely to me.
Also, even if this were the case, why would the servicing of a subsequent request by a different worker process consider the client-side
persisted viewstate to be corrupt? That's the bit I just don't understand.
Any help or suggestions would be greatly appreciated.
Regards, Trevor Andrew
Trevor,
Yes, I believe that is correct.
--
S. Justin Gengo, MCP
Web Developer
Free code library at: www.aboutfortunate.com
"Out of chaos comes order."
Nietzche
"Trevor Andrew" <nn**@tassoc.co m.au> wrote in message
news:e%******** **********@TK2M SFTNGP09.phx.gb l... Hi Justin,
Thanks for that ... I understand that viewstate is encoded, and the bits that are persisted on the server side are the machine keys to perform this encoding. But isn't that all that is persisted server side? Surely none of the web form related viewstate data is persisted server side?
Regards, Trevor Andrew
"S. Justin Gengo" <sj*****@aboutf ortunate.com> wrote in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. I don't believe the entire view state is persisted. But part of the view state is persisted server side. Let me see if I can explain this clearly... For security reasons the view state is encoded. Part of the encoding
process is kept server side and is used to compare a submitted view state with
the part kept on the server. This makes it very difficult for someone to impersonate a page post back sending false data in the viewstate.
-- S. Justin Gengo, MCP Web Developer
Free code library at: www.aboutfortunate.com
"Out of chaos comes order." Nietzche "Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:eT******** ********@tk2msf tngp13.phx.gbl. .. Hi There,
By way of further clarification, I have been told by my web hosting company that:
a. Viewstate IS persisted on the server, and hence this is where the problem arises. b. This is only an issue with Windows 2003, which they are now
running. c. There is no way to stop ASP.NET persisting a copy of viewstate on
the server.
Not wishing to sound sceptical, but points a) and c) above really
puzzle me. I thought that Viewstate (as opposed to session state) was most definitely only a client side form of persistence. Can someone confirm one way or the other?
Regards, Trevor Andrew
"Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. > Hi There, > > I have a small ASP.NET application under development. I am using VS.NET 2002 > (2003 upgrade is on the way) with .NET Framework 1.1. It is hosted
on a web > hosting service in the US. I am experiencing the "Viewstate
corrupted" error > message on a particular page, when that page is left for a period of time > and I return to it again, and submit it again. The page in question
has a > drop-down list of various RSS news feeds I am interested in, so I'll often > look at a set of news articles, read one and return to my page and choose > another RSS feed. > > I have been informed by my web hosting organisation that the problem is > caused by "worker process recycling". That is, to minimise resources after a > period of inactivity, the worker process servicing requests for my
web site > is > re-used. > > Does this sound plausible? Many of the other explanations regarding > synchronised machine keys in machine.config files sound much more likely to > me. > > Also, even if this were the case, why would the servicing of a subsequent > request by a different worker process consider the client-side persisted > viewstate to be corrupt? That's the bit I just don't understand. > > Any help or suggestions would be greatly appreciated. > > Regards, > Trevor Andrew > >
Trevor,
Yes, I believe that is correct.
--
S. Justin Gengo, MCP
Web Developer
Free code library at: www.aboutfortunate.com
"Out of chaos comes order."
Nietzche
"Trevor Andrew" <nn**@tassoc.co m.au> wrote in message
news:e%******** **********@TK2M SFTNGP09.phx.gb l... Hi Justin,
Thanks for that ... I understand that viewstate is encoded, and the bits that are persisted on the server side are the machine keys to perform this encoding. But isn't that all that is persisted server side? Surely none of the web form related viewstate data is persisted server side?
Regards, Trevor Andrew
"S. Justin Gengo" <sj*****@aboutf ortunate.com> wrote in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. I don't believe the entire view state is persisted. But part of the view state is persisted server side. Let me see if I can explain this clearly... For security reasons the view state is encoded. Part of the encoding
process is kept server side and is used to compare a submitted view state with
the part kept on the server. This makes it very difficult for someone to impersonate a page post back sending false data in the viewstate.
-- S. Justin Gengo, MCP Web Developer
Free code library at: www.aboutfortunate.com
"Out of chaos comes order." Nietzche "Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:eT******** ********@tk2msf tngp13.phx.gbl. .. Hi There,
By way of further clarification, I have been told by my web hosting company that:
a. Viewstate IS persisted on the server, and hence this is where the problem arises. b. This is only an issue with Windows 2003, which they are now
running. c. There is no way to stop ASP.NET persisting a copy of viewstate on
the server.
Not wishing to sound sceptical, but points a) and c) above really
puzzle me. I thought that Viewstate (as opposed to session state) was most definitely only a client side form of persistence. Can someone confirm one way or the other?
Regards, Trevor Andrew
"Trevor Andrew" <nn**@tassoc.co m.au> wrote in message news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. > Hi There, > > I have a small ASP.NET application under development. I am using VS.NET 2002 > (2003 upgrade is on the way) with .NET Framework 1.1. It is hosted
on a web > hosting service in the US. I am experiencing the "Viewstate
corrupted" error > message on a particular page, when that page is left for a period of time > and I return to it again, and submit it again. The page in question
has a > drop-down list of various RSS news feeds I am interested in, so I'll often > look at a set of news articles, read one and return to my page and choose > another RSS feed. > > I have been informed by my web hosting organisation that the problem is > caused by "worker process recycling". That is, to minimise resources after a > period of inactivity, the worker process servicing requests for my
web site > is > re-used. > > Does this sound plausible? Many of the other explanations regarding > synchronised machine keys in machine.config files sound much more likely to > me. > > Also, even if this were the case, why would the servicing of a subsequent > request by a different worker process consider the client-side persisted > viewstate to be corrupt? That's the bit I just don't understand. > > Any help or suggestions would be greatly appreciated. > > Regards, > Trevor Andrew > >
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