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3 days ago
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Delaying specific endpoints¶
Making an existing API slow can be easily accomplished combining mock’s Base APIs and the delay option.
$ mock serve -p 8000 --base example.com --delay 2000
You may want however to make a specific endpoint slow instead of the whole API. This can be achieved using middlewares:
$ mock serve -p 8000 --base example.com --middleware '
if [ "${MOCK_REQUEST_ENDPOINT}" = "some/endpoint" ]
then
sleep 2 # wait two seconds
fi
'
With that last example, our API at localhost:8000 will act as a proxy to example.com. All requests will be responded immediately except some/endpoint which will have a delay of 2 seconds.
An API powered by multiple languages¶
$ mock serve -p 3000 \
--route js \
--exec '
node <<EOF | mock write
console.log("Hello from Node.js!")
EOF
' \
--route python \
--exec '
python3 <<EOF | mock write
print("Hello from Python!")
EOF
' \
--route php \
--exec '
php <<EOF | mock write
<?php
echo "Hello from PHP!\n";
?>
EOF
'
Let’s test it:
$ curl localhost:3000/js
# Prints out: Hello from Node.js!
$ curl localhost:3000/python
# Prints out: Hello from Python!
$ curl localhost:3000/php
# Prints out: Hello from PHP!
A stateful API¶
$ export TMP=$(mktemp)
$ printf "0" > "${TMP}"
$ mock serve -p 3000 \
--route '/hello' \
--exec '
printf "%s + 1\n" "$(cat ${TMP})" | bc | sponge "${TMP}"
printf "This server has received %s request(s) so far." "$(cat '"${TMP}"')" | mock write
'
Let’s test it:
$ curl localhost:3000/hello
# Prints out: This server has received 1 request(s) so far.
$ curl localhost:3000/hello
# Prints out: This server has received 2 request(s) so far.
$ curl localhost:3000/hello
# Prints out: This server has received 3 request(s) so far.
