wizardly-snippets

Curl

Index

• Standard curl
• Certificate validation
• Performance monitoring with curl

Standard curl

curl -vko /dev/null https://github.com

Certificate validation

openssl s_client -connect https://github.com </dev/null 2>/dev/null | openssl x509 -noout -text | grep DNS:

Performance monitoring with curl

Single run

curl -kw "time_namelookup:  %{time_namelookup} \
            \ntime_connect:  %{time_connect} \
            \ntime_appconnect:  %{time_appconnect} \
            \ntime_pretransfer:  %{time_pretransfer} \
            \ntime_redirect:  %{time_redirect} \
            \ntime_starttransfer:  %{time_starttransfer} \
            \n----------\ntime_total:  %{time_total} \
            \n" -o /dev/null -s "https://github.com/"

Continuos monitoring with watch

watch -d -c -n 2 'curl -kw "time_namelookup:  %{time_namelookup}\ntime_connect:  %{time_connect}\ntime_appconnect:  %{time_appconnect}\ntime_pretransfer:  %{time_pretransfer}\ntime_redirect:  %{time_redirect}\ntime_starttransfer:  %{time_starttransfer}\n----------\ntime_total:  %{time_total}\n" -o /dev/null -s "https://github.com/"'

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