Macos – Looking for HTTP debugging proxy for Mac similar to Fiddler on Windows

VPN would create a new network device, you can see it in ifconfig command, and then route all system network to that device, you could see the route use route command.

But HTTP Proxy (in this case, the Charles) is different, it just open a port, to use it, you must specify your application setting to use that port for HTTP stuffs. and as Kevin Reid's answer, curl, wget etc don't read OS X's system wide settings.

If your proxy is SOCKS (Charles supports both HTTP and SOCKS), you could use ProxyChains or tsocks for application doesn't support proxy setting.

e.g.:

$ proxychains git clone https://github.com/rofl0r/proxychains-ng

According to the Fiddler Wiki:

SAZ files are simply specially formatted .ZIP files. If you rename a .SAZ file to .ZIP, you can open it for viewing using standard ZIP viewing tools.

Inside a SAZ file, you will find:

_index.htm - an optional file containing a human readable version of the Session List. This file is not processed when loading a .SAZ file and exists solely for manual examination. [Content_Types.xml] — (Added in v2.4.0.9) A metadata file which specifies a few MIME types so the archive can be read by System.IO.Packaging or other clients that support the Open Packaging Conventions. a raw folder - containing files representing each web session. Inside the Raw folder, there will be three files for each web session.

sessid#_c.txt - contains the raw client request. sessid#_s.txt - contains the raw server request. sessid#_m.xml - contains metadata including session flags, socket reuse information, etc. The SAZ/ZIP file's comment field contains information about the version of Fiddler that generated the archive.

SAZ files should always be forward/backward compatible, although some features may be missing (e.g. socket reuse information) when loading older files into the newest versions of Fiddler.

SAZ Files MIME types are: application/x-fiddler-session-archive