Use ThreadingTCPServer

Use socket.ThreadingTCPServer for RedirectServer. Allows
multiple simultaneous requests.

Add manual test helper script tools/requests-timer.sh

Issue #9

goto_http_redirect_server/goto_http_redirect_server.py

@@ -52,10 +52,11 @@
 IP_LOCALHOST = '127.0.0.1'
 HOSTNAME = socket.gethostname()
 
+# RedirectServer class things
+SOCKET_LISTEN_BACKLOG = 30  # eventually passed to socket.listen
 # HTTP Status Code used for redirects (among several possible redirect codes)
 REDIRECT_CODE_DEFAULT = http.HTTPStatus.PERMANENT_REDIRECT
 Redirect_Code = REDIRECT_CODE_DEFAULT
-
 SIGNAL_RELOAD_UNIX = 'SIGUSR1'
 SIGNAL_RELOAD_WINDOWS = 'SIGBREAK'
 # signal to cause --redirects file reload
@@ -700,12 +701,19 @@ def load_redirects(from_to: FromTo_List,
     return entrys_files
 
 
-class RedirectServer(socketserver.TCPServer):
+class RedirectServer(socketserver.ThreadingTCPServer):
     """
     Custom Server to allow reloading redirects while serve_forever.
     """
     field_delimiter = FIELD_DELMITER_DEFAULT
 
+    def __init__(self, *args):
+        """adjust parameters of the Parent class"""
+        super().__init__(*args)
+        self.block_on_close = False
+        self.request_queue_size = SOCKET_LISTEN_BACKLOG
+        self.timeout = 5
+
     def __enter__(self):
         """Python version <= 3.5 does not implement BaseServer.__enter__"""
         if hasattr(socketserver.TCPServer, '__enter__'):

tools/requests-timer.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+
+if [[ ${#} != 1 ]] && [[ ${#} != 2 ]]; then
+    echo "usage:
+
+    $(basename -- "${0}") URL [COUNT]
+
+        URL of the request
+        COUNT of request processes
+
+This script is to aid manual testing of many requests and the time elapsed.
+It starts COUNT child processes that loop curl request of URL.
+
+For each request, it prints:
+
+    milliseconds for request,HTTP return code,[PASS|FAIL] of curl request
+
+For example:
+
+    913,200,PASS
+" >&2
+    exit 1
+fi
+
+
+readonly url=${1}
+declare -a PIDs=()
+
+function time_ms() {
+    # epoch time in milliseconds
+    echo -n "$(($(date '+%s%N') / 1000000))"
+}
+
+declare -i reqs=${2:-5}  # requestors
+declare tspl=0.1  # time sleep per launch, per request
+
+# create ${reqs} number of child process of loops of curl requests
+for i in $(seq 1 ${reqs}); do
+   (
+        set +e
+        sleep $(python -c "print(${reqs} * ${tspl} + 2);")
+        declare mesg=
+        while sleep ${tspl}; do
+            start=$(time_ms)
+            if out=$(curl -v "${url}" 2>&1); then
+                mesg='PASS'
+            else
+                mesg='FAIL'
+            fi
+            end=$(time_ms)
+            code=$(echo "${out}" | grep -Fe '< HTTP/1.0 ' | grep -oEe ' [[:digit:]]+ ' | tr -d ' ')
+            echo "$((${end} - ${start})),${code},${mesg}"
+        done
+   ) &
+   PIDs[${#PIDs[@]}]=$!
+   sleep ${tspl}
+done
+
+function exit_() {
+    (
+        set -x
+        #kill "${PIDs[@]}"
+    )
+}
+trap exit_ EXIT
+
+echo "Script PID is $$" >&2
+echo "Child PIDs is ${PIDs[*]}" >&2
+echo "exit via Ctrl+c" >&2
+wait