httptrace

The main idea is the ability to track a set of events that occur within a lifecycle of a http request. For example, dns resolution, tcp connection creation, data written to the tcp connection, data received from the tcp connection and so on.

client request lifecycle % chmod +x runner.sh
% ./runner.sh

developer@Developers-MacBook-Air httptrace % ./runner.sh starting to create conn www.bing.com:443 starting to look up dns {"Host":"www.bing.com"} done looking up dns {"Addrs":[{"IP":"204.79.197.200","Zone":""},{"IP":"13.107.21.200","Zone":""},{"IP":"2620:1ec:c11::200","Zone":""}],"Err":null,"Coalesced":false} starting tcp connection {"addr":"204.79.197.200:443","network":"tcp"} tcp connection created {"addr":"204.79.197.200:443","err":null,"network":"tcp"} connection established {"Conn":{},"Reused":false,"WasIdle":false,"IdleTime":0}

body closed starting to create conn www.bing.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":1868251459}

body closed starting to create conn www.bing.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":1923763459}

body closed starting to create conn www.google.com:443 starting to look up dns {"Host":"www.google.com"} done looking up dns {"Addrs":[{"IP":"142.250.199.36","Zone":""},{"IP":"2404:6800:4001:808::2004","Zone":""}],"Err":null,"Coalesced":false} starting tcp connection {"addr":"142.250.199.36:443","network":"tcp"} tcp connection created {"addr":"142.250.199.36:443","err":null,"network":"tcp"} connection established {"Conn":{},"Reused":false,"WasIdle":false,"IdleTime":0}

body closed starting to create conn www.google.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":1680313625}

body closed starting to create conn www.google.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":1692113542}

body closed starting to create conn www.bing.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":8235616584}

body closed starting to create conn www.bing.com:443 connection established {"Conn":{},"Reused":true,"WasIdle":true,"IdleTime":1839693708}

body closed developer@Developers-MacBook-Air httptrace %