HTTP Archive Specification by Honza HTTP Archive Specification by Honza

 

We have been working with Simon Perkins and Steve Souders on an open format for exporting HTTP tracing information. It's called HTTP Archive (HAR) and we have just finished spec v1.1.

The format is already supported by Firebug (withNetExport extension installed), HTTPWatch 6.2 and also DebugBar 5.3. Further tools like Show Slow andCesium could be the next.

The key idea is to have a common format for archiving HTTP information that are captured by HTTP sniffers. These logs contain valuable info about page load performance and can be further used to analyze and optimize weaknesses of the monitored page.

There is already a few blog posts about this, explaining all details and so, let me just summarize the most important links here.

Links

HAR Specification

HAR Discussion Group (first post moderated)

HAR Viewer Online preview of *.har files.

NetExport Firebug Extension for exporting HTTP logs.

Recommended Firebug Configuration: Firebug 1.5a26+NetExport 0.7b5

Rss Commenti

4 Comments

  1. Is this similar to the "Session Archive" (zip based) used by fiddler?

    #1 Fowl
  2. @Fowl: Yes, but Fiddler uses *.saz files, Fiddler Session Archive Zip (among others). This file contains different structure (with roughly the same info as HAR). We are in touch with Eric Lawrence (the author of Fiddler) and I hope Fiddler will be one of those tools that also support HAR.

    #2 Honza
  3. I love it so much

    #3 Memee
  4. [...] support - Being able to save Speed Tracer’s data to file and share it is great. Recently, Firebug, HttpWatch, and DebugBar have all launched support for the HTTP Archive file format I helped [...]

    #4 High Performance Web Sites :: Speed Tracer - visibility into the browser

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