次の AWS Lambda 関数に、API Geteway 経由でアクセスする方法です。
これは、３つの整数、aa,bb,cc を与えて合計 sum を計算するプログラムです。
sum_up.py
# -*- coding: utf-8 -*-
#
# sum_up.py
#
# Oct/20/2017
#
# --------------------------------------------------------------------
import sys
import json
# --------------------------------------------------------------------
def sum_up_handler(event, context):
sys.stderr.write("*** sum_up_handler *** start ***\n")
#
aa = 0
bb = 0
cc = 0
#
sys.stderr.write("Received event: " + json.dumps(event, indent=2) + "\n")
if ('aa' in event):
sys.stderr.write("aa = " + event['aa'] + "\n")
aa = int(event['aa'])
#
if ('bb' in event):
sys.stderr.write("bb = " + event['bb'] + "\n")
bb = int(event['bb'])
#
if ('cc' in event):
sys.stderr.write("cc = " + event['cc'] + "\n")
cc = int(event['cc'])
#
version = "Oct/19/2017 AM 16:42"
#
sum = aa + bb + cc
#
sys.stderr.write("version = " + version + "\n")
sys.stderr.write("sum = " + str(sum) + "\n")
sys.stderr.write("*** sum_up_handler *** end ***\n")
#
rvalue = {}
rvalue['aa'] = aa
rvalue['bb'] = bb
rvalue['cc'] = cc
rvalue['sum'] = sum
rvalue['version'] = version
rvalue['language'] = 'Python'
#
return rvalue
#
# --------------------------------------------------------------------
- これを、AWS Lambda の関数にする方法は、
- API Gateway の設定は、
-
API Gateway で cors を有効にします。
-
Web ページとスクリプトです。jQuery を使います。
cors.html
<!DOCTYPE html>
<html lang="ja">
<head>
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Cache-Control" content="no-cache" />
<meta http-equiv="CONTENT-TYPE" content="text/html; charset=utf-8" />
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="cors.js"></script>
<title>AWS API Gateway</title>
</head>
<body>
<div id="answer">answer</div>
<hr />
<div id="outarea_aa">outarea_aa</div>
<div id="outarea_bb">outarea_bb</div>
<div id="outarea_cc">outarea_cc</div>
<div id="outarea_dd">outarea_dd</div>
<div id="outarea_ee">outarea_ee</div>
<div id="outarea_ff">outarea_ff</div>
<div id="outarea_gg">outarea_gg</div>
<div id="outarea_hh">outarea_hh</div>
<hr />
Version: Oct/19/2017 PM 15:19<br />
</body>
</html>
次のプログラムの rest_api_id は、変更して下さい。
cors.js
// -----------------------------------------------------------------------
//
// cors.js
//
// Oct/20/2017
//
// -----------------------------------------------------------------------
jQuery (function ()
{
jQuery("#outarea_aa").text ("*** cors.js *** start *** PM 18:28")
getPost()
jQuery("#outarea_hh").text ("*** cors.js *** end ***")
})
// -----------------------------------------------------------------------
function getPost()
{
const rest_api_id="bbc2fbufm6"
const url="https://" + rest_api_id + ".execute-api.ap-northeast-1.amazonaws.com/test"
const params = {'aa': '121','bb': '304','cc': '256'}
const args = JSON.stringify(params)
jQuery.post(url,args,function(res)
{
const sum = res.sum
var str_out = ""
str_out += "aa = " + params['aa'] + "<br />"
str_out += "bb = " + params['bb'] + "<br />"
str_out += "cc = " + params['cc'] + "<br />"
str_out += "sum = " + sum + "<br />"
jQuery("#answer").html (str_out)
})
}
// -----------------------------------------------------------------------