Question

我正在尝试从Android Studio中的应用程序请求AWS DynamoDB中的一些条目。我为scanResult得到CRC32不匹配。有谁知道为什么会这样。在下面附加片段和堆栈跟踪。

credentials = new CognitoCachingCredentialsProvider(
            MapValidate.getContext(), // Context
            “FILLED_MY_ID_HERE", // Identity Pool ID
            Regions.US_EAST_1 // Region
    );

AmazonDynamoDBClient dynamoDB = new AmazonDynamoDBClient(credentials);
Region usEast1 = Region.getRegion(Regions.US_EAST_1);
dynamoDB.setRegion(usEast1);

HashMap<String,Condition> scanFilter = new HashMap<String,Condition>();

Condition condition1lat = new Condition()
            .withComparisonOperator(ComparisonOperator.EQ.toString())
            .withAttributeValueList(new AttributeValue().withS(user_lat));
scanFilter.put("DegLat", condition1lat);

ScanRequest scanRequest = new ScanRequest()
            .withTableName("MY_TABLE_NAME")
            .withAttributesToGet("DegLat","DegLong","Latitude")
            .withScanFilter(scanFilter);

ScanResult result = dynamoDB.scan(scanRequest);

我收到以下异常，如下所示：

04-28 19:34:03.729    4744-4793/com.google.sample I/AmazonHttpClient﹕ 
Unable to execute HTTP request: 
Client calculated crc32 checksum didn't match that calculated by server side

Answer 1

CRC校验和错误可能是由请求标头中的请求压缩引起的。如果您还没有这样做，请使用ClientConfiguration尝试以下操作：

a[contains(@onclick,'servletLinkJunkHere...')]/preceding-sibling::IMG/@SRC

Answer 2

更新：我刚刚解决了这个问题。这是sdk-2.2.0的问题。几天前升级到最新版本的2.2.1解决了这个问题。

Answer 3

Android SDK实际上不支持ClientConfiguration.DEFAULT_USE_GIP ...如果您查看HttpRequestFactory类https://github.com/aws/aws-sdk-android/blob/4de3a3146d66d9ab5684eb5e71d5a2cef9f4dec9/aws-android-sdk-core/src/main/java/com/amazonaws/http/HttpRequestFactory.java，它会尝试考虑这一点如果您没有明确设置Accept-Encoding，那么sdk默认会关闭压缩。但是，如果你明确地设置它，你可能会遇到压缩问题。

如果这不能解决您的问题，请告诉我。

谢谢，韦斯顿

AWS crc32不匹配发电机

3 个答案: