AWS SignatureDoesNotMatch
接收：
SignatureDoesNotMatch我们计算的请求签名与您提供的签名不匹配。 检查您的AWS秘密访问密钥和签名方法。 详细信息请参阅服务文档。
有以下几点：
String associateTag = "example-20";
String awsAccessKeyId = "accessKeyId";
String awsSecretKey = "secretKey";
String endpoint = "webservices.amazon.com";
String uri = "/onca/xml";
String charset = "UTF8";
private String buildQueryString(String keywords) {
Map<String,String> params = new ArrayMap<>();
List<String> pairs = new ArrayList<>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
params.put("Service","AWSECommerceService");
params.put("Operation","ItemSearch");
params.put("AWSAccessKeyId",awsAccessKeyId);
params.put("AssociateTag",associateTag);
params.put("SearchIndex","All");
params.put("ResponseGroup","Images,ItemAttributes");
params.put("Timestamp",sdf.format(new Date()));
params.put("Keywords", keywords);
Map<String, String> treeMap = new TreeMap<>(params);
try {
for (Map.Entry<String, String> param : treeMap.entrySet()) {
pairs.add(URLEncoder.encode(param.getKey(), charset) + "=" + URLEncoder.encode(param.getValue(), charset));
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String queryString = "";
for (int i = 0; i < pairs.size(); i++) {
if (i != 0) {
queryString += "&";
}
queryString += pairs.get(i);
}
Log.d(TAG, "queryString: " + queryString);
return queryString;
}
private String buildSignature(String queryString) {
String hash = "";
try {
String message = "GETn" + endpoint + "n" + uri + "n" + queryString;
Log.d(TAG, "message: " + message);
Mac sha_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(awsSecretKey.getBytes(charset), "HmacSHA256");
sha_HMAC.init(secret_key);
hash = Base64.encodeToString(sha_HMAC.doFinal(message.getBytes(charset)), Base64.DEFAULT);
}
catch (Exception e){
System.out.println("Error");
}
return hash;
}
public void searchProducts(String keywords) {
String requestUrl = "";
String queryString = buildQueryString(keywords);
String signature = buildSignature(queryString);
Log.d(TAG, "signature: " + signature);
try {
requestUrl = "http://" + endpoint + uri + "?" + queryString + "&Signature=" + URLEncoder.encode(signature, charset);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Log.d(TAG, "requestUrl: " + requestUrl);
Ion.with(context)
.load(requestUrl)
.asString()
.setCallback(new FutureCallback<String>() {
@Override
public void onCompleted(Exception e, String result) {
Log.d(TAG, "searchProducts result: " + result);
}
});
}
可能是什么问题呢？
确保你的系统时钟是正确的。 使用NTP同步它是个好主意。 在过去，当时间不同步时，我看到了签名错误。
我之前见过的是，这通常取决于权限。 检查访问和密钥是否正确，并且您有足够的权限。
更改：
Base64.DEFAULT;
至：
Base64.NO_WRAP;