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Bash - simple URL ping tool (URL response time measuring)
10 points
In this short article, we would like to show how in Bash, write a simple tool that pings indicated URLs checking response time.
test_requests.sh file:
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function test_request()4
{5
url="$1"6
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t1=$(date +%s%9N)8
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curl -k "${url}" &> /dev/null10
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t2=$(date +%s%9N)12
dt=$((t2 - t1))13
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printf "%16d %16d %16d %16d %s\n" \15
$dt \16
$(($dt / 1000)) \17
$(($dt / 1000000)) \18
$(($dt / 1000000000)) \19
"$url";20
}21
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echo23
echo -n " [in nanoseconds] ";24
echo -n "[in microseconds] ";25
echo -n "[in milliseconds] ";26
echo -n " [in seconds] ";27
echo -n " [requested url] ";28
echo29
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test_request "https://dirask.com/posts/MySQL-select-last-row-j890a1"31
test_request "http://localhost/posts/MySQL-select-last-row-j890a1"32
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echoScript running:
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./test_requests.sh2
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# or:4
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watch -n 1 ./test_requests.shExample output:
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Every 1.0s: ./test_requests.sh my-server: Sun May 23 13:00:56 20212
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[in nanoseconds] [in microseconds] [in milliseconds] [in seconds] [requested url]5
110754854 110754 110 0 https://dirask.com/posts/MySQL-select-last-row-j890a16
95801101 95801 95 0 http://localhost/posts/MySQL-select-last-row-j890a17
In this example, we are able to change Host: header to the proper domain.
That configuration is useful when we have VirtualHosts that redirect traffic depending on a specific domain.
test_requests.sh file:
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function test_request()4
{5
url="$1"6
host="$2"7
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t1=$(date +%s%9N)9
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if [ -n "$host" ];11
then12
curl -k --header "Host: $host" "$url" &> /dev/null13
else14
curl -k "$url" &> /dev/null15
fi16
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t2=$(date +%s%9N)18
dt=$((t2 - t1))19
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printf "%16d %16d %16d %16d %s" \21
$dt \22
$(($dt / 1000)) \23
$(($dt / 1000000)) \24
$(($dt / 1000000000)) \25
"$url";26
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[ -n "$host" ] && echo -n " (Host: $host)";28
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echo30
}31
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echo33
echo -n " [in nanoseconds] ";34
echo -n "[in microseconds] ";35
echo -n "[in milliseconds] ";36
echo -n " [in seconds] ";37
echo -n " [requested url] ";38
echo39
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test_request "https://dirask.com/posts/MySQL-select-last-row-j890a1" ""41
test_request "https://localhost/posts/MySQL-select-last-row-j890a1" "dirask.com"42
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echoScript running:
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./test_requests.sh2
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# or:4
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watch -n 1 ./test_requests.shExample output:
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Every 1.0s: ./test_requests.sh my-server: Sun May 23 13:00:56 20212
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[in nanoseconds] [in microseconds] [in milliseconds] [in seconds] [requested url]5
110754854 110754 110 0 https://dirask.com/posts/MySQL-select-last-row-j890a16
95801101 95801 95 0 https://localhost/posts/MySQL-select-last-row-j890a1 (Host: dirask.com)7
