chirp

A simple http measurement tool based on libcurl. It takes a single url as an argument and emits timestamped, columnar measurement data to stdout.

goals

• ping, but for http
• be small
• be unsurprising
• be composable

building

$ make install

running

$ chirp http://www.canary.io
1424107725 http://www.canary.io 10.0.1.39 23.235.44.133 31.492 50.288 115.498 117.325 449 13884 0 200
1424107726 http://www.canary.io 10.0.1.39 23.235.44.133 5.419 22.581 39.062 42.888 448 13884 0 200
1424107727 http://www.canary.io 10.0.1.39 23.235.44.133 5.383 20.985 40.595 43.136 448 13884 0 200
1424107728 http://www.canary.io 10.0.1.39 23.235.44.133 5.410 19.897 38.481 39.913 448 13884 0 200
^C

output

chirp emits the following fields for consumption:

• timestamp
• url being measured
• ip of the host running chirp, returns n/a if unavailable
• ip chirp connected to, return n/a if unavailable
• time taken (in milliseconds) to resolve the url
• time taken (in milliseconds) to connect to the url
• time taken (in milliseconds) to receive the first byte
• total time taken (in milliseconds)
• header size
• body size
• libcurl return status code
• http status code