如何使用 PHP SDK 3 从 AWS API Gateway 访问 API

Question

谁能帮助弄清楚如何使用 AWS Signature、AWS Credentials 和 PHP SDK 3 来访问 API Gateway API？似乎 AWS 签名实际上并未将标头附加到 Guzzle 请求。

这是我的代码：

<?php

require 'vendor/autoload.php';

use Aws\Credentials\Credentials;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Request;
use Aws\Signature\SignatureV4;

$access_key = '<access_key>';
$secret_key = '<secret_key>';
$url = 'https://<api-id>.execute-api.us-east-1.amazonaws.com/v1/camel?q=*';
$region = 'us-east-1';

$credentials = new Credentials($access_key, $secret_key);
var_dump($credentials);

$client = new Client();
$request = new Request('GET', $url);
var_dump($request);

$s4 = new SignatureV4("execute-api", $region);
$s4 = new SignatureV4("execute-api", "us-east-1");
$s4->signRequest($request, $credentials);
var_dump($s4);
var_dump($request);

$response = $client->send($request);

我得到的错误是：

( ! ) Fatal error: Uncaught exception 
'GuzzleHttp\Exception\ClientException' with message ' in 
/path/to/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php on 
line 113

( ! ) GuzzleHttp\Exception\ClientException: Client error: `GET 
https://<api-id>.execute-api.us-east-1.amazonaws.com/v1/camel?q=*` 
resulted in a `403 Forbidden` response: {"message":"Missing 
Authentication Token"} in 
/path/to/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php on 
line 113
Call Stack
#   Time    Memory  Function    Location
1   0.0002  234048  {main}( )   ../access.php:0
2   0.2801  486272  GuzzleHttp\Client->send( )  ../access.php:29
3   0.3787  574224  GuzzleHttp\Promise\Promise->wait( ) ../Client.php:106

access.php 的第 29 行是：

$response = $client->send($request);

从 var_dumps 中看不到正在添加任何标头。我能够在 API Gateway 和 Postman 中成功测试此端点。启用 CORS 似乎没有什么区别。

有没有人解决过这个问题？

https://forums.aws.amazon.com/post!reply.jspa?messageID=795522和https://forums.aws.amazon.com/thread.jspa?messageID=774631&tstart=0也涵盖了这个问题，但是那里没有解决方案。

Answer 1

谢谢，迈克尔，你在上面的帮助。

您必须使用 new SignatureV4 的返回值，这是一个修改后的请求。

$s4 = new SignatureV4("execute-api", $region);
$signedrequest = $s4->signRequest($request, $credentials);

$response = $client->send($signedrequest);

echo $response->getBody();