I asked a Microsoft PM about this with regard to the XSLT document() function and using it to access a database. He said it could be done purely in managed code (no PInvoke). I never tried it though.
Richard > -----Original Message----- > From: dotnet discussion [mailto:[EMAIL PROTECTED]]On Behalf Of > David B. Bitton > Sent: 10 May 2002 15:28 > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] custom URL protocol handler > > > As the "original poster", or as I like to call myself, Dave, perhaps a > clarification is necessary. The idea came from a concept that was brought > by the Apache FOP development mailing list. FOP is a Java package for > rendering XSL-FO into formats such as PDF. > > The code allows for the XSL-FO to reference an external image > source by way > of a URL. When a developer asked about how to retreive images from a DB, > someone said that what they had done, is defined a custom URL protocol > handler that returned the image from the DB as a byte stream, the > same as if > it was fetched from a HTTP server. > > Ok, so I am currently developing an app that parses template files, and > outputs content based on the files. I thought that it would be a neat > concept if I could use custom URL's that my parser would pickup, and call > the proper custom protocol handler. > > Now, I've seen from the original postings, that I need to implement two > classes that inherit from WebRequest and WebResponse. Where my question > lies, is two fold. First, does anyone have a sample if this being done? > And second, once I have these classes, how are they known to be > called when > I create the WebClient() object? > > -- > > David B. Bitton > [EMAIL PROTECTED] > www.codenoevil.com > > Code Made Fresh DailyT > ----- Original Message ----- > From: "Thomas Tomiczek" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, May 10, 2002 4:02 AM > Subject: Re: custom URL protocol handler > > > I know, STILL I am not so sure what the original poster actually wants > to achieve. And I am pretty sure he does not talk of C++ :-) > > > Regards > > Thomas Tomiczek > THONA Consulting Ltd. > (Microsoft MVP C#/.NET) > > -----Original Message----- > From: Valery Pryamikov [mailto:[EMAIL PROTECTED]] > Sent: Freitag, 10. Mai 2002 09:55 > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] custom URL protocol handler > > Thomas, > IE clickable and pluggable protocol handlers are rather different > things. With PPH you can use URL from any URLMoniker consumer, like f.e. > source to XML Document, or URL for DirectX media surface image, and > anything else. You control your own URL schema as you wish, and at last > - to implement PPH isn't such a difficult job, esp. if you use helper > classes from my web page ;-). > As an example - vp.inlineurl protocol is only 32 lines of C++ code long > ;-). > > -Valery. > > -----Original Message----- > From: Thomas Tomiczek [mailto:[EMAIL PROTECTED]] > Sent: Friday, May 10, 2002 9:46 AM > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] custom URL protocol handler > > Valery, > > You define overkill by a far margin - well, it MAY be. > > To implement a handler for a "clickable" protocol in IE all you need is > ONE (!) registry key to be set. Then the hyperlink click will start an > executable with the hyperlink as parameter. > > The original poster asked for a class exposed, BUT - maybe he wants to > make something like an email client, look-wise. Actually, I would have > preferred to know more about what he wants to achieve - he wants > something handled from within IE, and if this is as a result for a > hyperlink (like the user clicking on a hyperlink to start an > application), then this is easier. > > We use the protocol handler plus a "pickup application" that is then > starting the real app and getting the URL by windows message. > > Reference: > http://msdn.microsoft.com/workshop/networking/pluggable/overview/appendi > x_a.asp > > Titled: Registering an Application to a URL Protocol > > In most cases this is enough :-) > > Regards > > Thomas Tomiczek > THONA Consulting Ltd. > (Microsoft MVP C#/.NET) > > -----Original Message----- > From: Valery Pryamikov [mailto:[EMAIL PROTECTED]] > Sent: Freitag, 10. Mai 2002 09:33 > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] custom URL protocol handler > > Hi, > To use it from IE (and other URLMoniker consumers) you have to > implement your own Pluggable Protocol Handler. You can find a couple of > C++ (VC6) samples how to implement your PPH on my webpage > http://home.online.no/~valery. Tim Tabor also has PPH sample on his > website, which you can check. > Clear .Net solution doesn't quite work, except if you just go interop > way, implement all necessary PPH support+registration and register you > .Net object as COM object. You'll also need to put it into the GAC along > the way, for making it available for any URLMoniker consumer. > Another way of solving it could be to implement un-managed PPH (in C++) > and host CLR from it. It will give you many more available choices than > going other way around. F.e. just think of the providing you own > Evidence, or/and ApplicationBase/PrivateBinPath, ConfigurationFile and > so fourth. > Possibilities with the later solution is quite impressive, like f.e. you > can use CodeDOM to dynamically compile and run embedded > Jscript/CSharp/VB.Net code; use .Net remoting for communicating to .Net > remote objects and/or webservices + many-many more. > And hosting CLR is rather simple and straight-forward task - check > "hosting interfaces.doc" in Tools Developers Guide. > > -Valery. > > -----Original Message----- > From: David B. Bitton [mailto:[EMAIL PROTECTED]] > Sent: Thursday, May 09, 2002 11:25 PM > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] custom URL protocol handler > > Thanks. I checked out the link, but I'm not seeing how I would use this > to > create my own protocol. For example, I'd like to be able to put in a > URL > "foo://bar" and have a class handle that accordingly. Once I have > something > coded, how do I use it, and can I use it in IE on the local machine? > > -- > > David B. Bitton > [EMAIL PROTECTED] > www.codenoevil.com > > Code Made Fresh Daily(tm) > ----- Original Message ----- > From: "Marsh, Drew" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, May 07, 2002 1:45 PM > Subject: Re: custom URL protocol handler > > > > David B. Bitton [mailto:[EMAIL PROTECTED]] wrote: > > > > > Java 2 allows for the definition of custom URL protocol > > > handlers. By this, any entity that takes a URL as location > > > for data, you can create a custom protocol (like cvs://), and > > > your custom protocol handler would fetch the data. > > > > > > Can I do this in .NET? > > > > Yup, check out the System.Net.WebRequest architecture, specifically > the > > section called "Programming Pluggable Protocols"[1]. > > > > HTH, > > Drew > > > > [1] > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, > or > subscribe to other DevelopMentor lists at http://discuss.develop.com. > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or > subscribe to other DevelopMentor lists at http://discuss.develop.com. > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or > subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
