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.NET Forum / .NET Framework / New Users / December 2004HTTP Handler to create, write files & account privileges
Hi, I need to use an HTTPHandler to create and write files. I wanted to create the file in the directory that has this handler, and other handlers. For me, this directory is: c:\Inetpub\wwwroot\HttpHandlers. I get an error: "Access to the path "C:\Inetpub\wwwroot\HTTPHandlers\bidhero.ccn" is denied." I can have the code write files to other locations just fine. I'm using ASP.net v.1.1 on Windows XP, and Windows 2003. 1. Which would be the best place to create and write this file to? This is not a temporary file. Once created, it will be there for the length of the application. 2. I've read several posts regarding this error, and they talk of account privileges. How do I know which account is running this program, and how do I change account privileges? How safe is it to change privileges to allow a process to write? Thanks. -Shefali Hello shefali, If the HttpHandler is writing out a file strictly for the purpose of allowing a client to later make a request for it, why not just serve the file right out of the HttpHandler? I do this all over the place for images that are stored in a database. If you're not using it for this purpose, why is the handler creating/writing files? -- Matt Berther http://www.mattberther.com > Hi, > [quoted text clipped - 18 lines] > Thanks. > -Shefali Matt, Thanks for your response. What I have is two http handlers, one that receives data, saves this data, data must stay persistent, and another handler that receives requests for this data, and writes a file out as the response. Both have to handle multiple requests at the same time. So, how would what you propose work? Would I have a string or a property in the class that I would write data to, and it would be stored in memory? Like I said, the data needs to persist for the lifetime of the web application (httphandler). What happens if the server reboots? So, back to, if the only way to do this is to write a file, which physical location should I write the file to? Thank a ton. -Shefali > Hello shefali, > [quoted text clipped - 32 lines] > > Thanks. > > -Shefali Hello shefali, Fair enough... I presume that you've checked that the ASPNET account has the appropriate NTFS permissions to actually write to that location? -- Matt Berther http://www.mattberther.com > Matt, > [quoted text clipped - 52 lines] >>> Thanks. >>> -Shefali Also remember that for Win2003 by default the "Network Service" account will need write access to that location as the worker process doesn't run under the ASPNET account Regards Richard Blewett - DevelopMentor http://www.dotnetconsult.co.uk/weblog http://www.dotnetconsult.co.uk Hello shefali, Fair enough... I presume that you've checked that the ASPNET account has the appropriate NTFS permissions to actually write to that location? -- Matt Berther http://www.mattberther.com Hello Richard Blewett [DevelopMentor], Of course... Thanks for mentioning that... -- Matt Berther http://www.mattberther.com > Also remember that for Win2003 by default the "Network Service" > account will need write access to that location as the worker process [quoted text clipped - 13 lines] > Matt Berther > http://www.mattberther.com Matt, Richard, Thank you for your inputs. Like I said, I have several web apps. If I change the ASPNET account privilege to 'administrator', that would give all the webapps on the system full control. Instead, would it not be better, if I don't change the account privilege for the ASPNET account (leave it to its current 'limited' setting), and write the files 'systemroot/temp'? Reading the .net Framework developers Guide, section 'ASP.NET Required Access Control Lists (ACLs)', it seems that 'systemroot/temp' has access type 'Read/write/delete' and this location is used to support web services. What do you think? Thanks again. -Shefali > Hello Richard Blewett [DevelopMentor], > [quoted text clipped - 21 lines] > > Matt Berther > > http://www.mattberther.com Hello shefali, I wasnt suggesting you set the priviledge to 'administrator'. I suggested that you set the permissions on the folder you want to write to to allow the ASPNET account. -- Matt Berther http://www.mattberther.com > Matt, Richard, > [quoted text clipped - 36 lines] >>> Matt Berther >>> http://www.mattberther.com Thank you very much. I did just this, and 'am happy with the solution. Thanks a ton. -Shefali > Hello shefali, > [quoted text clipped - 46 lines] > >>> Matt Berther > >>> http://www.mattberther.com
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