Example of dynamically generating a zip file download from ASP.NET, with minimal threading and memory usage.
Specifically, with this code:
- No file is ever completely in memory at any time. As files are read, they are immediately compressed and sent to the browser.
- No threads are ever blocked waiting on reads or writes. The fully-asynchronous code permits threads to return to the thread pool unless they are actually executing code.
There are five examples in this repository, each on its own branch:
- net6-ziparchive - ASP.NET (.NET 6.0) using the built-in
ZipArchive - core-ziparchive - ASP.NET (.NET Core 1.0) using the built-in
ZipArchive - core-dotnetzip - ASP.NET (.NET Core 1.0) using
DotNetZip(which restricts this application to the full .NET Framework) - full-ziparchive - ASP.NET (.NET 4.6.1) using the built-in
ZipArchive - full-dotnetzip - ASP.NET (.NET 4.6.1) using
DotNetZip
The core-ziparchive and full-ziparchive branches include a workaround for a bug in the ZipArchive class on those platforms. The net6-ziparchive does not include that workaround since the bug has been fixed.
The net6-ziparchive, core-ziparchive, and core-dotnetzip branches include their own FileCallbackResult to asynchronously stream output on demand.