Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Ho Robert,
I have created a bug report at http://bugzilla.xamarin.com/show_bug.cgi?id=2119.
Martin
To: mono-devel-list@lists.ximian.com
From: robe...@gmx.net
Date: Wed, 9 Nov 2011 18:52:26 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
Hi Martin,
please file a bug against MD's bugzilla. IIRC, MD has an integrated
bug reporting feature.
Robert
On 09.11.2011 18:36, H . wrote:
Hi Robert,
your suggestion is correct. It's not a problem of Mono itself but rather a
problem with MonoDevelop's debugging session.
I have extended my web app with two TextBoxes which are used to display the
contents of http_proxy and no_proxy. When running the app from within
MonoDevelop the TextBox associated with the no_proxy value is empty.
However, if I start xsp2 from the command line, both TextBoxes are
displaying the expected values. I have always used the Debug build option.
MonoDevelop is not fully resetting the environment for debugging sessions.
But it definitly resets the no_proxy variable.
This is a very confusing and difficult to track down problem. It is
especially annoying when trying to debug the new proxy support in
Mono/master that I have added within the last months. It also means, that
web apps which are using WebClient and it's proxy support will not work as
expected within a debugging session of MonoDevelop. Maybe someone that
knows more about the internals of MonoDevelop can fix this problem.
Greetings,
Martin
To: mono-devel-list@lists.ximian.com
From: robe...@gmx.net
Date: Wed, 9 Nov 2011 15:17:36 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working
in Linux ASP.NET app
On 09.11.2011 13:51, H . wrote:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;;
echo $no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following
code in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string
str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
One more eventuality: Maybe MonoDevelop is resetting the environment
while invoking XSP in debug mode.
You can check this by manually invoking XSP from a terminal where you
know that this env var is set.
Robert
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Robert, I didn't know that Linux hides certain environment variables from a process depending on the identity it is running in. I guess that the only choice for platform indepent ASP.NET apps is then to configure proxy settings via web.config. Alternatively, it is possible to set the WebClient object's Proxy property to null in case no proxies should be used. This is most likely valid in intranet environments. The current Mono/master supports both of these methods. Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Sat, 5 Nov 2011 11:47:51 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app Hi Martin, On 05.11.2011 09:48, H . wrote: Hi Robert, I am using XSP2 MonoDevelop to debug. You have to restart your user session if you've changed the proxy settings. Being environment-based, these settings won't propagate to running processes. Based on the answers I think that it might be a Linux related issue. I have implemented extensive proxy support for WebClient and it's underlying classes in Mono/master. This code is based on the no_proxy environment variable in Linux. The question is, how can we obtain the list of proxies to bypass in Linux? Is there a consistend way to do this for standard Linux apps AND Linux ASP.NET apps? There is no standard regarding proxy configuration besides those two environment variables http_proxy and no_proxy. Tools that make use of proxies (wget, curl, browsers) may have other proprietary configurations, but at the and they all support these environment variables. Robert Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 15:47:37 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default settings. A common way to solve that (if Ubuntu's config tools don't provide a facility to set either global or web server specific vars) is to set this env var globally and manually. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
2011/11/9 H . test051...@hotmail.com: Hi Robert, I didn't know that Linux hides certain environment variables from a process depending on the identity it is running in. I guess that the only choice for It doesn't, not as such. Environment variables are inherently per process, and this is the same in Windows. When a process is launched it generally inherits the environment variables from its parent, with any requested modifications. Then it boils down to how are environment variables configured administratively for a particular system? The concept of system-wide and per-user environment variables is an abstraction built on the above facility, and there is no fundamental requirement for that (e.g. it would be possibly to build a system where they are set and applied per executable name, or something entirely different). In Windows there is a control panel app to set them per user or system-wide. In Linux each distro may have different methods, but basically any system-wide environment settings will be stored in e.g. /etc/environment, and it then becomes the responsibility of a few core processes to read and apply these settings to themselves during e.g. login. Regular applications launched by the user will then inherit them. Concerning proxy settings with Ubuntu 10.04 as example: These are in System-Preferences-Network Proxy. These are by default per user (since it's under Preferences, not Administration). However, the button Apply System-Wide is provided. Clicking that then gives me: oskar$ cat /etc/environment PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games LANG=en_US.UTF-8 http_proxy=http://ff:8080/; oskar$ sudo su - www-data www-data$ printenv|grep -i prox http_proxy=http://ff:8080/ Notice how the proxy is applied also for the www-data user. However, to make the web server see the change it would have to be restarted. Possibly a reboot is the easiest way to ensure they are re-read. /Oskar platform indepent ASP.NET apps is then to configure proxy settings via web.config. Alternatively, it is possible to set the WebClient object's Proxy property to null in case no proxies should be used. This is most likely valid in intranet environments. The current Mono/master supports both of these methods. Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Sat, 5 Nov 2011 11:47:51 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app Hi Martin, On 05.11.2011 09:48, H . wrote: Hi Robert, I am using XSP2 MonoDevelop to debug. You have to restart your user session if you've changed the proxy settings. Being environment-based, these settings won't propagate to running processes. Based on the answers I think that it might be a Linux related issue. I have implemented extensive proxy support for WebClient and it's underlying classes in Mono/master. This code is based on the no_proxy environment variable in Linux. The question is, how can we obtain the list of proxies to bypass in Linux? Is there a consistend way to do this for standard Linux apps AND Linux ASP.NET apps? There is no standard regarding proxy configuration besides those two environment variables http_proxy and no_proxy. Tools that make use of proxies (wget, curl, browsers) may have other proprietary configurations, but at the and they all support these environment variables. Robert Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 15:47:37 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default settings. A common way to solve that (if Ubuntu's config tools don't provide a facility to set either global or web server specific vars) is to set this env var globally and manually. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following code in
Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value while
str2 is null
By the way, I have checked the user name of the mono process. It's the same as
the currently logged in user and therefore it should have access to all
environment variables. ASP.NET/Mono seems to have a problem reading the
no_proxy variable while the http_proxy variable can be accessed as expected.
Best regards,
Martin
From: test051...@hotmail.com
To: robe...@gmx.net; mono-devel-list@lists.ximian.com
Date: Sat, 5 Nov 2011 08:48:34 +
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
Hi Robert,
I am using XSP2 MonoDevelop to debug.
Based on the answers I think that it might be a Linux related issue.
I have implemented extensive proxy support for WebClient and it's underlying
classes in Mono/master. This code is based on the no_proxy environment variable
in Linux. The question is, how can we obtain the list of proxies to bypass in
Linux? Is there a consistend way to do this for standard Linux apps AND Linux
ASP.NET apps?
Best regards,
Martin
To: mono-devel-list@lists.ximian.com
From: robe...@gmx.net
Date: Thu, 3 Nov 2011 15:47:37 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
On 03.11.2011 14:12, H . wrote:
Hi Robert,
thanks for your hints.
The link sent describes how environment variables can be set up in
Ubuntu. Of course, nobody would try to manually set up environment
variables when trying to configure proxies. This is done by using
SystemSettingsNetwork Proxy. After that, Ubuntu sets up the
necessary environment variables. In case of the no_proxy environment
variable this can be tested by issuing echo $no_proxy on the
command line.
Yes, you may see it on *your* own command line, as a normal user,
but the web server (you didn't specify which one, so we can't help)
may have its own environment default settings.
A common way to solve that (if Ubuntu's config tools don't
provide a facility to set either global or web server
specific vars) is to set this env var globally and manually.
Robert
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Martin, (1) Configure system proxy settings and reboot machine (2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo $no_proxy returns localhost,127.0.0.0/8,*.local (3) Created an ASP.NET project in MonoDevelop and entered the following code in It's probably the desktop environment (GNOME, KDE, etc.) that either keeps resetting this env var or does not include it at all. By the way, I have checked the user name of the mono process. It's the same as the currently logged in user and therefore it should have access to all environment variables. ASP.NET/Mono seems to have a problem reading the no_proxy variable while the http_proxy variable can be accessed as expected. Your conclusion is wrong. See Oskar's explanation on how the environment is inherited etc. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
2011/11/9 H . test051...@hotmail.com:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following code
in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
By the way, I have checked the user name of the mono process. It's the same
as the currently logged in user and therefore it should have access to all
environment variables. ASP.NET/Mono seems to have a problem reading the
no_proxy variable while the http_proxy variable can be accessed as expected.
Weird. I just did a quick test using command line program, and this
prints the correct information when run using F5 in Monodevelop, on
Mono 2.6.7.
public static void Main(string[] args)
{
Console.WriteLine(
Environment.GetEnvironmentVariable(http_proxy));
Console.WriteLine( Environment.GetEnvironmentVariable(no_proxy));
}
If you try this code both when run through Monodevelop, and when
compiled and run manually from the command line, is there a
difference?
If you move your code to Application_Start in global.asax, is there a
difference? (Long shot...)
/Oskar
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
On 09.11.2011 13:51, H . wrote:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following code
in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
One more eventuality: Maybe MonoDevelop is resetting the environment
while invoking XSP in debug mode.
You can check this by manually invoking XSP from a terminal where you
know that this env var is set.
Robert
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Oscar, thanks for your detailed explanation. To further clear things up, I have always used the button Apply System-Wide in all of my tests. The necessary environment variables should therefore be available system wide. Best regards, Martin From: oskar.bergg...@gmail.com Date: Wed, 9 Nov 2011 12:38:20 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app To: test051...@hotmail.com CC: mono-devel-list@lists.ximian.com 2011/11/9 H . test051...@hotmail.com: Hi Robert, I didn't know that Linux hides certain environment variables from a process depending on the identity it is running in. I guess that the only choice for It doesn't, not as such. Environment variables are inherently per process, and this is the same in Windows. When a process is launched it generally inherits the environment variables from its parent, with any requested modifications. Then it boils down to how are environment variables configured administratively for a particular system? The concept of system-wide and per-user environment variables is an abstraction built on the above facility, and there is no fundamental requirement for that (e.g. it would be possibly to build a system where they are set and applied per executable name, or something entirely different). In Windows there is a control panel app to set them per user or system-wide. In Linux each distro may have different methods, but basically any system-wide environment settings will be stored in e.g. /etc/environment, and it then becomes the responsibility of a few core processes to read and apply these settings to themselves during e.g. login. Regular applications launched by the user will then inherit them. Concerning proxy settings with Ubuntu 10.04 as example: These are in System-Preferences-Network Proxy. These are by default per user (since it's under Preferences, not Administration). However, the button Apply System-Wide is provided. Clicking that then gives me: oskar$ cat /etc/environment PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games LANG=en_US.UTF-8 http_proxy=http://ff:8080/; oskar$ sudo su - www-data www-data$ printenv|grep -i prox http_proxy=http://ff:8080/ Notice how the proxy is applied also for the www-data user. However, to make the web server see the change it would have to be restarted. Possibly a reboot is the easiest way to ensure they are re-read. /Oskar platform indepent ASP.NET apps is then to configure proxy settings via web.config. Alternatively, it is possible to set the WebClient object's Proxy property to null in case no proxies should be used. This is most likely valid in intranet environments. The current Mono/master supports both of these methods. Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Sat, 5 Nov 2011 11:47:51 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app Hi Martin, On 05.11.2011 09:48, H . wrote: Hi Robert, I am using XSP2 MonoDevelop to debug. You have to restart your user session if you've changed the proxy settings. Being environment-based, these settings won't propagate to running processes. Based on the answers I think that it might be a Linux related issue. I have implemented extensive proxy support for WebClient and it's underlying classes in Mono/master. This code is based on the no_proxy environment variable in Linux. The question is, how can we obtain the list of proxies to bypass in Linux? Is there a consistend way to do this for standard Linux apps AND Linux ASP.NET apps? There is no standard regarding proxy configuration besides those two environment variables http_proxy and no_proxy. Tools that make use of proxies (wget, curl, browsers) may have other proprietary configurations, but at the and they all support these environment variables. Robert Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 15:47:37 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Oscar,
yes, using a command line app everything works fine. The problems are
restricted to ASP.NET apps.
I did reboot my machine after changing proxy settings, so it shouldn't be a
problem with inheriting the environment variables between processes.
Furthermore I used the button Apply System-Wide in Ubuntu. I am sure, the
environment variables are correctly set up as they are available directly on
the command line. To be able to run xsp2 from the command line I need to extend
my test web app.
Greetings,
Martin
From: oskar.bergg...@gmail.com
Date: Wed, 9 Nov 2011 14:31:04 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
To: test051...@hotmail.com
CC: mono-devel-list@lists.ximian.com
2011/11/9 H . test051...@hotmail.com:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following code
in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
By the way, I have checked the user name of the mono process. It's the same
as the currently logged in user and therefore it should have access to all
environment variables. ASP.NET/Mono seems to have a problem reading the
no_proxy variable while the http_proxy variable can be accessed as expected.
Weird. I just did a quick test using command line program, and this
prints the correct information when run using F5 in Monodevelop, on
Mono 2.6.7.
public static void Main(string[] args)
{
Console.WriteLine(
Environment.GetEnvironmentVariable(http_proxy));
Console.WriteLine( Environment.GetEnvironmentVariable(no_proxy));
}
If you try this code both when run through Monodevelop, and when
compiled and run manually from the command line, is there a
difference?
If you move your code to Application_Start in global.asax, is there a
difference? (Long shot...)
/Oskar
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
In Monodevelop, have you had a look at the project options - Run -
General, where you can set environment variables used when running
through MD. Just to check to make sure nothing there is overriding
no_proxy for your web app.
/Oskar
2011/11/9 H . test051...@hotmail.com:
Hi Oscar,
yes, using a command line app everything works fine. The problems are
restricted to ASP.NET apps.
I did reboot my machine after changing proxy settings, so it shouldn't be a
problem with inheriting the environment variables between processes.
Furthermore I used the button Apply System-Wide in Ubuntu. I am sure, the
environment variables are correctly set up as they are available directly on
the command line. To be able to run xsp2 from the command line I need to
extend my test web app.
Greetings,
Martin
From: oskar.bergg...@gmail.com
Date: Wed, 9 Nov 2011 14:31:04 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working
in Linux ASP.NET app
To: test051...@hotmail.com
CC: mono-devel-list@lists.ximian.com
2011/11/9 H . test051...@hotmail.com:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;;
echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following
code
in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string
str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
By the way, I have checked the user name of the mono process. It's the
same
as the currently logged in user and therefore it should have access to
all
environment variables. ASP.NET/Mono seems to have a problem reading the
no_proxy variable while the http_proxy variable can be accessed as
expected.
Weird. I just did a quick test using command line program, and this
prints the correct information when run using F5 in Monodevelop, on
Mono 2.6.7.
public static void Main(string[] args)
{
Console.WriteLine(
Environment.GetEnvironmentVariable(http_proxy));
Console.WriteLine( Environment.GetEnvironmentVariable(no_proxy));
}
If you try this code both when run through Monodevelop, and when
compiled and run manually from the command line, is there a
difference?
If you move your code to Application_Start in global.asax, is there a
difference? (Long shot...)
/Oskar
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Robert,
your suggestion is correct. It's not a problem of Mono itself but rather a
problem with MonoDevelop's debugging session.
I have extended my web app with two TextBoxes which are used to display the
contents of http_proxy and no_proxy. When running the app from within
MonoDevelop the TextBox associated with the no_proxy value is empty. However,
if I start xsp2 from the command line, both TextBoxes are displaying the
expected values. I have always used the Debug build option.
MonoDevelop is not fully resetting the environment for debugging sessions. But
it definitly resets the no_proxy variable.
This is a very confusing and difficult to track down problem. It is especially
annoying when trying to debug the new proxy support in Mono/master that I have
added within the last months. It also means, that web apps which are using
WebClient and it's proxy support will not work as expected within a debugging
session of MonoDevelop. Maybe someone that knows more about the internals of
MonoDevelop can fix this problem.
Greetings,
Martin
To: mono-devel-list@lists.ximian.com
From: robe...@gmx.net
Date: Wed, 9 Nov 2011 15:17:36 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
On 09.11.2011 13:51, H . wrote:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following
code in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
One more eventuality: Maybe MonoDevelop is resetting the environment
while invoking XSP in debug mode.
You can check this by manually invoking XSP from a terminal where you
know that this env var is set.
Robert
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Martin,
please file a bug against MD's bugzilla. IIRC, MD has an integrated
bug reporting feature.
Robert
On 09.11.2011 18:36, H . wrote:
Hi Robert,
your suggestion is correct. It's not a problem of Mono itself but rather a
problem with MonoDevelop's debugging session.
I have extended my web app with two TextBoxes which are used to display the
contents of http_proxy and no_proxy. When running the app from within
MonoDevelop the TextBox associated with the no_proxy value is empty. However,
if I start xsp2 from the command line, both TextBoxes are displaying the
expected values. I have always used the Debug build option.
MonoDevelop is not fully resetting the environment for debugging sessions.
But it definitly resets the no_proxy variable.
This is a very confusing and difficult to track down problem. It is
especially annoying when trying to debug the new proxy support in Mono/master
that I have added within the last months. It also means, that web apps which
are using WebClient and it's proxy support will not work as expected within a
debugging session of MonoDevelop. Maybe someone that knows more about the
internals of MonoDevelop can fix this problem.
Greetings,
Martin
To: mono-devel-list@lists.ximian.com
From: robe...@gmx.net
Date: Wed, 9 Nov 2011 15:17:36 +0100
Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in
Linux ASP.NET app
On 09.11.2011 13:51, H . wrote:
Hi Robert,
I have now debugged the issue using Ubuntu Maverick/ 32 bit. I did the
following:
(1) Configure system proxy settings and reboot machine
(2) In terminal echo $http_proxy returns http://http.proxy:8080/;; echo
$no_proxy returns localhost,127.0.0.0/8,*.local
(3) Created an ASP.NET project in MonoDevelop and entered the following
code in Default.aspx.cs
protected void Page_Load(object Sender, EventArgs e)
{
string str1=Environment.GetEnvironmentVariable(http_proxy);
string str2=Environment.GetEnvironmentVariable(no_proxy);
string strBreak=stop;//put breakpoint at this line
}
(4) After pressing F5, we can see that str1 contains it's expected value
while str2 is null
One more eventuality: Maybe MonoDevelop is resetting the environment
while invoking XSP in debug mode.
You can check this by manually invoking XSP from a terminal where you
know that this env var is set.
Robert
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Mono-devel-list@lists.ximian.com
http://lists.ximian.com/mailman/listinfo/mono-devel-list
___
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Mono-devel-list@lists.ximian.com
http://lists.ximian.com/mailman/listinfo/mono-devel-list
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Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Robert, I am using XSP2 MonoDevelop to debug. Based on the answers I think that it might be a Linux related issue. I have implemented extensive proxy support for WebClient and it's underlying classes in Mono/master. This code is based on the no_proxy environment variable in Linux. The question is, how can we obtain the list of proxies to bypass in Linux? Is there a consistend way to do this for standard Linux apps AND Linux ASP.NET apps? Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 15:47:37 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default settings. A common way to solve that (if Ubuntu's config tools don't provide a facility to set either global or web server specific vars) is to set this env var globally and manually. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Martin, On 05.11.2011 09:48, H . wrote: Hi Robert, I am using XSP2 MonoDevelop to debug. You have to restart your user session if you've changed the proxy settings. Being environment-based, these settings won't propagate to running processes. Based on the answers I think that it might be a Linux related issue. I have implemented extensive proxy support for WebClient and it's underlying classes in Mono/master. This code is based on the no_proxy environment variable in Linux. The question is, how can we obtain the list of proxies to bypass in Linux? Is there a consistend way to do this for standard Linux apps AND Linux ASP.NET apps? There is no standard regarding proxy configuration besides those two environment variables http_proxy and no_proxy. Tools that make use of proxies (wget, curl, browsers) may have other proprietary configurations, but at the and they all support these environment variables. Robert Best regards, Martin To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 15:47:37 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default settings. A common way to solve that (if Ubuntu's config tools don't provide a facility to set either global or web server specific vars) is to set this env var globally and manually. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
[Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Environment.GetEnvironmentVariable(no_proxy) not working in Linux ASP.NET app After configuring proxies in Ubuntu, the environment variable no_proxy contains the list of proxies to bypass. Using Environment.GetEnvironmentVariable(no_proxy) we can retrieve the content of this environment variable as a string. This is working fine in standard C# applications. However, when calling Environment.GetEnvironmentVariable(no_proxy) within an ASP.NET application, the return value is always null. As a result, the current proxy support in Mono fails to establish the list of proxies to bypass. I am wondering how Environment.GetEnvironmentVariable() is working behind the scenes. I guess the reason why it fails in ASP.NET is related to some kind of a permission issue. Does anybody know more about the implementation details of Environment.GetEnvironmentVariable() in Mono? ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
On 03.11.2011 13:51, H . wrote: Environment.GetEnvironmentVariable(no_proxy) not working in Linux ASP.NET app After configuring proxies in Ubuntu, the environment variable no_proxy contains the list of proxies to bypass. Using Environment.GetEnvironmentVariable(no_proxy) we can retrieve the content of this environment variable as a string. This is working fine in standard C# applications. See https://help.ubuntu.com/community/EnvironmentVariables#System-wide_environment_variables Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. My question is not about setting up environment variables. I need to retrieve the content of $no_proxy via C# in an ASP.NET app. To: mono-devel-list@lists.ximian.com From: robe...@gmx.net Date: Thu, 3 Nov 2011 13:58:50 +0100 Subject: Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app On 03.11.2011 13:51, H . wrote: Environment.GetEnvironmentVariable(no_proxy) not working in Linux ASP.NET app After configuring proxies in Ubuntu, the environment variable no_proxy contains the list of proxies to bypass. Using Environment.GetEnvironmentVariable(no_proxy) we can retrieve the content of this environment variable as a string. This is working fine in standard C# applications. See https://help.ubuntu.com/community/EnvironmentVariables#System-wide_environment_variables Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
On Nov 3, 2011, at 9:12 AM, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. My question is not about setting up environment variables. I need to retrieve the content of $no_proxy via C# in an ASP.NET app. In all likelihood, the ASP.NET user (probably www-data, the Apache/Nginx/Lighttpd user) doesn't even have NO_PROXY set in its environment, since it doesn't make sense to set it. If you want NO_PROXY to propagate to the web server's environment, you'll have to edit its startup scripts to do so. Hope that helps. —Bojan ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
Remember that Environment Variables are set per-process and inherited by copying by child processes, so are you sure they were set before the web server hosting your asp.net was started? If you change afterwards it won't propagate to the service/daemon process... Rafael Monoman Teixeira --- The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...' Isaac Asimov US science fiction novelist scholar (1920 - 1992) On Thu, Nov 3, 2011 at 10:51 AM, H . test051...@hotmail.com wrote: Environment.GetEnvironmentVariable(no_proxy) not working in Linux ASP.NET app After configuring proxies in Ubuntu, the environment variable no_proxy contains the list of proxies to bypass. Using Environment.GetEnvironmentVariable(no_proxy) we can retrieve the content of this environment variable as a string. This is working fine in standard C# applications. However, when calling Environment.GetEnvironmentVariable(no_proxy) within an ASP.NET application, the return value is always null. As a result, the current proxy support in Mono fails to establish the list of proxies to bypass. I am wondering how Environment.GetEnvironmentVariable() is working behind the scenes. I guess the reason why it fails in ASP.NET is related to some kind of a permission issue. Does anybody know more about the implementation details of Environment.GetEnvironmentVariable() in Mono? ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Environment.GetEnvironmentVariable() not working in Linux ASP.NET app
On 03.11.2011 14:12, H . wrote: Hi Robert, thanks for your hints. The link sent describes how environment variables can be set up in Ubuntu. Of course, nobody would try to manually set up environment variables when trying to configure proxies. This is done by using SystemSettingsNetwork Proxy. After that, Ubuntu sets up the necessary environment variables. In case of the no_proxy environment variable this can be tested by issuing echo $no_proxy on the command line. Yes, you may see it on *your* own command line, as a normal user, but the web server (you didn't specify which one, so we can't help) may have its own environment default settings. A common way to solve that (if Ubuntu's config tools don't provide a facility to set either global or web server specific vars) is to set this env var globally and manually. Robert ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
