Microsoft Isa Server Http Header No Cache' title='Microsoft Isa Server Http Header No Cache' />FILExt.Here youll find a collection of file extensions many linked to the programs that created the files.This is the FILExt home.Complete Technical Acronyms, Glossary Definitions for PC, SAN, NAS, QA, Testing, HDTV, Wireless, Linux, Embedded, Networks, Video, Digital, pharma, Unix, Video.Common URL Redirection Techniques for IIS, Summary David Wang.For the next several entries, I am focusing on this frequently asked topic How do I rewrite redirect forward mask requests from one URL to another with IIS Common questions that fall into this topic include Redirect requests from http server to https server i.SSL only site, ExchangeOWA loginRedirect requests from http external to http internal and back i.Redirect requests from appusernamebob to app.URLsDo any of the above either transparently client URLlocation bar does not change or explicitly.I see these and similar questions asked over, and.I rewrite my explanation again and again.MS newsgroup reader periodically sweeps my replies away, over and over.Hmm. Hey, it may be the first time you asked the question, but it is not the first time I have answered it.I get that way when I am tired.This is my attempt at giving you the full, cogent details, hopefully once and for all.My main goals are to Establish a redirection taxonomy to help you recognize and classify the type of redirection you want to perform.Show how to implement or give reasons why it is not possible each type of redirection using either built in IIS core feature, custom ISAPI Filter DLLs, custom ISAPI Extension DLLs, or custom ASP script pages I consider ASP as an arbitrary ISAPI Extension DLL which allows script code to make underlying IIS function calls.Along the way, explain any random, related tidbits that have been asked before.As expected, the more sophisticated types of redirection require custom code installed as add ons to IIS, but we are all grown ups here who can either purchase binaries or copypastecompile code, right Good Now, I plan to show you how to do all these things without purchasing any add on modules, but through explanation you should also rapidly see WHY you would want to purchase an existing solution anyone mention SUPPORTABILITY Basic Types of Redirection.In my taxonomy, the web server can perform three types of redirection to handle any given request from the client Client Side Redirection The server sends a 3. Download Software From Microsoft Volume Licensing Portal here. Redirect response with a Location header containing the new URL, and the client makes another request to the new URL.Server Side Redirection The server transparently rewrites the request URL to another URL which remains on the same website as the original.Server Side Forwarding The server transparently rewrites the request URL to another URL which does NOT remain on the same website as the original.Note the new website can be on another machine, but not necessarily.Before reading any further, I advise you to take a good look at the above classification and determine which type your question falls under.In particular, Server Side RedirectionForward have been described by people using colorful phrases such as CourtesyPretty URLURL shadowing.URL masking. PublishingExporting internal website to be accessible externally.Redirecting URL on one web server to be handled by another web server.One web server reverse proxying another server.Force HTTP requests to HTTPSSSLEtc.In any case, I believe they all fall into exactly one of the three buckets in my taxonomy.If your desired redirection does NOT fall under exactly one of the three buckets or does not fall under ANY of my three buckets.Comment or post a private Contact email to me.I am open to suggestionschange.Really. Some Subtle Points.Some people distinguish redirections by whether the URL locationaddress bar changes in the client.This classification is problematic because HTML Frames can give the illusion of a non changing URL locationaddress bar because web browsers usually only display the parent frames URL, but anyone can browse the HTML to determine where the content is really coming from.After all, the user must have download the HTML in plain text in order for the browser to display it.Thus, the non changing URL locationaddress bar hides absolutely nothing and achieves no security.Server Side RedirectionForwarding also change the response without changing the clients URL locationaddress bar, and both are very different things from HTML Frames.Some people are surprised that POST requests do not have transparent Client Side Redirection.Well, let us pretend we are the browser and look at things from its perspective, and you tell me whether Client Side Redirection should be transparent or not I just sent this large 4.GB entity body to the server and got this 3.Redirect back. Should I go ahead and automatically POST the the 4.GB entity body to the new URLWhat if I am on a dial up I just sent my usernamepassword with a form over SSL and got this 3.Redirect back. Should I send it again over UNENCRYPTED HTTP to the new URL Other Subtle Point.Now, another common user statement which frequently follows the question about how to rewrite URLs on IIS is that Apache has had these three types of redirection built in forever, so why is IIS so far behind Well, let us look at the situation objectively, apples to apples.Actually, Apache core does NOT perform ANY sort of redirection.You need to install and configure add on modules like modredirect to get Client Side Redirection, modrewrite to get Server Side Redirection, and modproxy to get Server Side Forwarding.So, the ability to redirect is NOT built in the modules happen to be in common distros and configuration is baked into httpd.Apache core. Now, IIS core performs Client Side redirection, configurable via the Http.Redirect property.IIS core is not really behind feature wise.Also, you need to install add on modules to get Server Side Redirection and Server Side Forwarding behavior, so IIS is not really behind Apache in extensibility, either.Where things differ is availability.No one seems to provide modules to do Server Side Redirection or Server Side Forwarding on IIS for free.At least, I am not aware of any freeopen source add on IIS modules which implement those Server Side behaviors I only know of for fee modules like ISAPIRewrite.So, before you come barging into IIS forumsnewsgroups asking for free code and complaining about the lack of free modules consider contributing to the common cause if you can because only then can you help improve the availability of public modules for IIS.I know that many people have written their own versions to perferm Server Side RedirectionForwarding, but none have donated their code for public use.It is all locked up on internal servers owned by private companies.HOWTO Implement Redirections, Index.Ok, that is enough preface for now.Here are all the redirection possibilities that I can think of right now, categorized by the type of redirection performed, technology used to perform the redirection, and amount of coding involved.Get ready for this index to be updated with links.Client Side Redirection using IIS Core no code Http.Redirect. IIS Core script code Http.Errors and ASPASP script code Response.Redirect. ISAPI Filter compiled code SFREQSENDRESPONSEHEADERISAPI Extension compiled code HSEREQSENDRESPONSEHEADER, HSEREQSENDURL, HSEREQSENDURLREDIRECTRESPServer Side Redirection using IIS Core no code involved IIs.Web. File and Script.Maps. ASP some code involved Server.Transfer and Server.Execute ASP onlyISAPI Filter compiled code Set.Header url in SFNOTIFYPREPROCHEADERS or SFNOTIFYAUTHCOMPLETEISAPI Extension compiled code HSEREQEXECURL and HSEREQEXECUNICODEURL and Wildcard Application Mapping.Server Side Forwarding using ISAPI Filter compilied code Using Win.Http. ISAPI Extension compiled code Using Win.Http and Wildcard Application MappingDavid.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
November 2017
Categories |