这显示错误“我们计算的请求签名与您提供的签名不匹配。请检查您的AWS。
string url;
integer statuscode;
String date1=json.serialize(Datetime.now());
if(date1.contains('"')){
date1=date1.replace('"','');}
String algorithmName = 'HmacSHA256';
date1=date1.substring(0,(date1.length()-5));
date1=date1+'Z';
date1=EncodingUtil.UrlEncode(date1,'UTF-8');
String Action=EncodingUtil.UrlEncode('CreateTopic','UTF-8');
String AccessKey=EncodingUtil.UrlEncode('APIKEY','UTF-8'); // API key hide due to security resion but i check it work fine for SES
String Signaturemethod=EncodingUtil.UrlEncode('HmacSHA256','UTF-8');
string str= 'GET\nsns.us-east-1.amazonaws.com\n/\nAction='+Action+'&Name=Testtopics&AWSAccessKeyId='+AccessKey+'&Timestamp='+date1+'&SignatureVersion=2&SignatureMethod='+Signaturemethod;
Blob mac = Crypto.generateMac(algorithmName,Blob.valueOf(str),Blob.valueOf('SECURITYKEY')); //blob value of key used in signature
url='https://sns.us-east-1.amazonaws.com/?Action=CreateTopic&Name=Testtopics&AWSAccessKeyId=ACCESSKEY&Timestamp='+date1+'&SignatureVersion=2&SignatureMethod=HmacSHA256&Signature='+EncodingUtil.UrlEncode(EncodingUtil.base64Encode(mac),'UTF-8'); // final url
答案 0 :(得分：0)
我对AWS没有太多想法，但下面是我能找到的。无法在任何地方测试这些东西来解决问题。
以下错误消息的常见原因是没有正确创建要签名的字符串，例如忘记URL编码字符，例如冒号（:)和Amazon S3存储桶名称中的正斜杠（/）。
<Error>
<Type>Sender</Type>
<Code>SignatureDoesNotMatch</Code>
<Message>The request signature we calculated does not match the signature you provided.
Check your AWS Secret Access Key and signing method.
Consult the service documentation for details.</Message>
</Error>
http://docs.aws.amazon.com/general/latest/gr/signature-version-2.html
http://docs.aws.amazon.com/AmazonS3/latest/dev/BucketRestrictions.html
答案 1 :(得分：0)
您的网址末尾可能会遗漏一个尾随的单引号。看看是否有所作为。
url="https://sns.us-east-1.amazonaws.com/?Action=CreateTopic&Name=Testtopics&AWSAccessKeyId=ACCESSKEY&Timestamp='+date1+'&SignatureVersion=2&SignatureMethod=HmacSHA256&Signature='+EncodingUtil.UrlEncode(EncodingUtil.base64Encode(mac),'UTF-8')+"'";