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Why didn’t my cached content revalidate to the web server? (IE8 edition)

Posted Monday, July 06, 2009 1:33 PM by AriPernick
For the super eagle eyed developer or Web Server admin, you might have noticed that cache entry validation happens slightly less frequently in IE8. I’m talking about the check to the Web Server (via If-Modified-Since ) to see if the cached version of Read More...
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HTTP Connection Management

Posted Friday, May 08, 2009 9:29 AM by AriPernick
HTTP is a request/response protocol. You request some resource like the HTML of a webpage and the response comes back with the HTML attached.  As each request is sent on a connection, the complete response must be read from the connection before Read More...
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Ask Perf explains how winInet is used

Posted Tuesday, August 21, 2007 10:37 AM by wndpteam
Ask Perf, the blog of the Enterprise Platforms Windows Server Performance Team, is spending some time explaining a bit of how WinInet/WinHTTP and their surrounding components work with each other. Go check it out ! -- Ari Read More...
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WinInet ETW Logs: Part 1 - Reading Logs

Posted Monday, February 05, 2007 8:00 AM by wndpteam
Hello, my name is Marcus Frazier. I am a developer on the WinInet team and I am here to talk about reading and understanding WinInet ETW logs. If you need to know how to capture these logs, check out Jonathan’s post . Keep in mind that WinInet ETW tracing Read More...
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A Tale of 20 Cookies

Posted Monday, August 28, 2006 5:00 AM by wndpteam
As more applications move to leveraging the web, either through desktop-integration or complete migration to a web model, maintaining user state on the web becomes critical. For many web sites and applications this means the use of in-memory and persistent Read More...
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Content-Encoding != Content-Type

Posted Monday, August 21, 2006 8:00 AM by wndpteam
RFC 2616 for HTTP 1.1 specifies how web servers must indicate encoding transformations using the Content-Encoding header. Although on the surface, Content-Encoding (e.g., gzip, deflate, compress) and Content-Type (e.g., x-application/x-gzip) sound similar, Read More...
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A WinINet Chunked-Encoding Story

Posted Monday, August 14, 2006 8:05 AM by wndpteam
A couple of months back, Nick Bradbury of Homesite and FeedDemon fame posted a blog entitled, " Microsoft, Please fix this WinINet bug! " where he mentioned some users of FeedDemon 2.0 were experiencing a significant CPU spike when downloading RSS feeds. Read More...
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A bit about WinInet’s Index.dat – Q&A

Posted Monday, August 07, 2006 4:59 PM by wndpteam
In my previous post I tried to explain a bit about what the index.dat files are and what has changed in IE7/Windows Vista timeframe. The post got a couple questions that I'll attempt to answer here. 1) Mike: The real problem behind index.dat is that whether Read More...
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A bit about WinInet's Index.dat

Posted Friday, August 04, 2006 3:55 PM by wndpteam
Since a recent digg article and its underlying Wikipedia entry seems a little confused about index.dat, I’d like to give some more detail about what it is and what we have changed with it in IE7/Vista’s version of WinInet. As Jeffdav explained a while Read More...
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WinINet and WinHTTP IPv6 Support in Web Proxy Auto-Discovery (WPAD) scripts enabled in Windows Vista

Posted Tuesday, July 18, 2006 3:06 PM by wndpteam
Hi, my name is Jonathan Silvera and I am the WinINet and WinHTTP Program Manager. Today I would like to talk to you about changes we have made to add IPv6 support in the WinINet and WinHTTP WPAD helper functions. The explosion of the Internet in the late Read More...
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Calling WinInet Asynchronously from managed code

Posted Tuesday, July 18, 2006 1:29 PM by wndpteam
Hi, I’m Reymarx Gereda, SDET at the Networking Development Platform in the Windows team. Recently I saw a question in one of the MSDN forums about calling WinInet API from managed functions; this is something we did for testing the component, and here Read More...
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Extensions to the Navigator Proxy Auto-Config File Format specification to support IPv6 v0.9

Posted Thursday, July 13, 2006 6:45 PM by wndpteam
The following functions are extensions to the Navigator Proxy Auto-Config File Format specification to enable WPAD scripts to handle IPv6 capable networks: Predefined Functions and Environment for the JavaScript Function FindProxyforURLEx: Hostname based Read More...
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Wanted: Developer feedback for our "Next Generation" client HTTP stack

Posted Tuesday, June 06, 2006 12:48 PM by wndpteam
As we begin the planning phase for our "Next Generation" client HTTP stack , we would love to hear from developers using our existing APIs (WinINet and WinHTTP). Please help us understand what your experience has been so far and what you would like to Read More...
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WNDP Connect Site gets an upgrade!

Posted Tuesday, June 06, 2006 9:32 AM by wndpteam
Last year we setup a small site on connect.microsoft.com in order to let our blog readers, developers and users file bugs, make suggestions and get some conntent like whitepapers and samples early. The downside to the site was that you couldn't easily Read More...
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TLS enabled by default in IE 7.0 and WinINet

Posted Wednesday, April 12, 2006 12:00 PM by wndpteam
In order to provide a more secure experience, Microsoft is enabling TLS and extensions by default in Internet Explorer 7.0 and WinINet. Starting with Windows Vista, Schannel - the Security Support Provider (SSP), which implements TLS 1.0, will send “Extensions” during SSL/TLS protocol negotiation. Read More...
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