Leaky Abstractions

In the late 1990s, the Windows Shell and Internet Explorer teams introduced a lot of brilliant and intricate designs that allowed intricate extension of the shell and the browser to handle scenarios beyond what those built by Microsoft itself. For instance, Internet Explorer supported the notion of pluggable protocols (“What if some protocol, say, FTPSContinue reading “Leaky Abstractions”

Compression Context

ZIP is a great format—it’s extremely broadly deployed, relatively simple, and supports a wide variety of use-cases pretty well. ZIP is the underlying format beneath Java (.jar) Archives, Office (docx/xlsx/pptx) files, Fiddler (.saz) Session Archive ZIP files, and many more. Even though some features (Unicode filenames, AES encryption, advanced compression engines) aren’t supported by allContinue reading “Compression Context”

Repairing Corrupt ZIP Files

Fiddler’s default file format is the SAZ Format, which is just a ZIP file with a particular structure. Unfortunately, sometimes users’ SAZ files get corrupted due to failing disks or incomplete downloads, and when this happens, Fiddler can no longer open them. Because Fiddler uses a standard ZIP file, surely a good ZIP reader willContinue reading “Repairing Corrupt ZIP Files”