ios - Aws iOS sdk Pre-singed url 给出 "SignatureDoesNotMatch"错误

Question

在授予存储桶所有必要权限的情况下，使用 aws sdk 生成的预签名 URL 访问文件时遇到问题。

我已经从 github 下载了示例代码并更改了以下内容Awcredential 提供商按照我的要求。

更改如下

AWSStaticCredentialsProvider *credentialsProvider =[[AWSStaticCredentialsProvider alloc] initWithAccessKey:S3AccessKey secretKey:S3secretKey];

AWSServiceConfiguration *configuration = [[AWSServiceConfiguration alloc] initWithRegion:AWSRegionUSEast1 credentialsProvider:credentialsProvider];

AWSServiceManager.defaultServiceManager.defaultServiceConfiguration = configuration;

即使我将文件成功上传到 aws，我也无法使用上传时从 aws sdk 获取的预签名 URL 访问它们。

任何人都可以指出我在使用预签名网址访问文件时缺少的内容吗？

在浏览器中加载 url 时显示 SignatureDoesNotMatch 错误

Answer 1

“SignatureDoesNotMatch”最可能的原因是 header 字段中的内容与生成预签名 url 时提供的内容不同。

以下代码片段演示了如何使用预签名 url 生成和下载文件:

AWSS3GetPreSignedURLRequest *getPreSignedURLRequest = [AWSS3GetPreSignedURLRequest new];
    getPreSignedURLRequest.bucket = @"bucketname";
    getPreSignedURLRequest.key = @"keyname";
    getPreSignedURLRequest.HTTPMethod = AWSHTTPMethodGET;
    getPreSignedURLRequest.expires = [NSDate dateWithTimeIntervalSinceNow:3600];

    AWSS3PreSignedURLBuilder *preSignedURLBuilder = [AWSS3PreSignedURLBuilder defaultS3PreSignedURLBuilder];

    [[[preSignedURLBuilder getPreSignedURL:getPreSignedURLRequest] continueWithBlock:^id(BFTask *task) {

        if (task.error) {
            XCTAssertNil(task.error);
            return nil;
        }

        NSURL *presignedURL = task.result;
        //NSLog(@"(GET)presigned URL is: %@",presignedURL.absoluteString);

        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:presignedURL];
        request.cachePolicy = NSURLRequestReloadIgnoringLocalCacheData;

        NSError *returnError = nil;
        NSHTTPURLResponse *returnResponse = nil;

        NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&returnResponse error:&returnError];

        return nil;
    }] waitUntilFinished];