Hargo parses HAR files, can convert to curl format, and serve as a load test driver.
NAME:
hargo - work with HTTP Archive (.har) files
USAGE:
hargo <command> [arguments] <.har file>
VERSION:
0.1.2-dev.16 (28c9ef4)
AUTHOR:
Mark A. Richman <[email protected]>
COMMANDS:
fetch, f Fetch URLs in .har
curl, c Convert .har to curl
run, r Run .har file
validate, v Validate .har file
dump, d Dump .har file
load, l Load test .har file
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--debug Show debug output
--help, -h show help
--version, -v print the version
COPYRIGHT:
(c) 2019 Mark A. Richman
go get github.com/mrichman/hargo
cd $GOPATH/src/github.com/mrichman/hargo
go run cmd/hargo/hargo.go validate test/golang.org.har
Make sure that you have Go version 1.9 or greater (I haven't tested with lower) and that your GOPATH env variable is set (I recommand setting it to ~/go if you don't have one). If GOBIN is not set, also try setting that to ~/go/bin, as make install may fail. You can check all Go environment variables with go env.
go get -d github.com/mrichman/hargo
cd $GOPATH/src/github.com/mrichman/hargo
make install
If you use Google Chrome, you can record these files by following the steps below:
- Right-click anywhere on that page and click on Inspect Element to open Chrome's Developer Tools
- The Developer Tools will open as a panel at the bottom of the page. Click on the Network tab.
- Click the Record button, which is the solid black circle at the bottom of the Network tab, and you'll start recording activity in your browser.
- Refresh the page and start working normally
- Right-click within the Network tab and click Save as HAR with Content to save a copy of the activity that you recorded.
- Within the file window, save the HAR file.
The fetch command downloads all resources references in .har file:
hargo fetch foo.har
This will produce a directory named hargo-fetch-yyyymmddhhmmss containing all assets references by the .har file. This is similar to what you'd see when invoking wget on a particular URL.
The curl command will output a curl command line for each entry in the .har file.
hargo curl foo.har
The run command executes each HTTP request in .har file:
hargo run foo.har
This is similar to fetch but will not save any output.
The validate command will report any errors in the format of a .har file.
hargo validate foo.har
HAR file format is defined here: https://w3c.github.io/web-performance/specs/HAR/Overview.html
Dump prints information about all HTTP requests in .har file
hargo dump foo.har
Hargo can act as a load test agent. Given a .har file, hargo can spawn a number of concurrent workers to repeat each HTTP request in order. By default, hargo will spawn 10 workers and run for a duration of 60 seconds.
Hargo will also save its results to InfluxDB, if available. Each HTTP response is stored as a point of time-series data, which can be graphed by Chronograf, Grafana, or similar visualization tool for analysis.