API: Enable gzip middleware and test for it (algorand#6284)

Author: jannotti

daemon/algod/api/server/router.go

@@ -107,6 +107,7 @@ func NewRouter(logger logging.Logger, node APINodeInterface, shutdown <-chan str
 		middleware.RemoveTrailingSlash())
 	e.Use(
 		middlewares.MakeLogger(logger),
+		middleware.Gzip(),
 	)
 	// Optional middleware for Private Network Access Header (PNA). Must come before CORS middleware.
 	if node.Config().EnablePrivateNetworkAccessHeader {

test/scripts/e2e_subs/api-compression.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+filename=$(basename "$0")
+scriptname="${filename%.*}"
+date "+${scriptname} start %Y%m%d_%H%M%S"
+
+
+my_dir="$(dirname "$0")"
+source "$my_dir/rest.sh" "$@"
+
+function headers() {
+    curl -q -s -D - -o /dev/null -H "Authorization: Bearer $PUB_TOKEN" -H "Accept-Encoding: gzip, deflate, br" "$NET$1"
+}
+
+set -e
+set -x
+set -o pipefail
+export SHELLOPTS
+
+OUT=$(headers "/v2/blocks/1")
+[[ ${OUT} == *Content-Encoding:\ gzip* ]] || false
+
+date "+${scriptname} OK %Y%m%d_%H%M%S"