我在 Swift 中使用预签名 url 将多部分数据上传到 S3 存储桶中时收到错误。
我的代码是:-
func AWSS3UploadMultipartData(data: Data, strVideoName : String, strContentType: String , _ completion: @escaping s3CompletionHandler)
{
let multipartRequest = AWSS3CreateMultipartUploadRequest()
multipartRequest?.key = strVideoName
multipartRequest?.bucket = S3BucketName
multipartRequest?.contentType = strContentType
let awsService = AWSS3.default()
awsService.createMultipartUpload(multipartRequest!) { (multipartUploadOutput, error) in
self.multipartUploadId = multipartUploadOutput?.uploadId
self.completedPartsInfo = AWSS3CompletedMultipartUpload()
self.uploadAllParts()
}
}
func uploadAllParts ()
{
repeat {
// get the length of the chunk
let thisChunkSize = xxxxx;
// get the chunk data
let chunk = xxxxxx
//saving the file to Documents Directory in chunkURL
self.uploadAWSPart(uploadDict: dict, fileURL: chunkURL!, mediaName : fileName,
awsPartNumber: offset)
offset += thisChunkSize;
} while (offset < length);
}
func uploadAWSPart(uploadDict : [String : Any], fileURL : URL, mediaName : String, awsPartNumber : Int)
{
let getPreSignedURLRequest = AWSS3GetPreSignedURLRequest()
getPreSignedURLRequest.bucket = S3BucketName
getPreSignedURLRequest.key = mediaName
getPreSignedURLRequest.httpMethod = AWSHTTPMethod.PUT;
getPreSignedURLRequest.expires = Date(timeIntervalSinceNow: 36 * 60 * 60);
getPreSignedURLRequest.contentType = contentType
getPreSignedURLRequest.setValue(self.multipartUploadId, forRequestParameter: "uploadId")
getPreSignedURLRequest.setValue(String(awsPartNumber), forRequestParameter: "partNumber")
let MD5 = self.md5File(url: fileURL)
getPreSignedURLRequest.contentMD5 = MD5
let presignedTask =
AWSS3PreSignedURLBuilder.default().getPreSignedURL(getPreSignedURLRequest)
presignedTask.continueWith(executor: AWSExecutor.mainThread(), block: { (task:AWSTask!) -> AnyObject! in
if let presignedURL = task.result
{
///This is the response of presignedURL:-
*******************************************************
https://bucketName.s3-ap-south-
1.amazonaws.com/c9e407127756360d54b85a469b728e0d_1534190164.75355.mp4?
X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-
Credential=AKIAIBZJLCO6SJCZZ7YQ%2F20180813%2Fap-south-
1%2Fs3%2Faws4_request&X-Amz-Date=20180813T195604Z&X-Amz-
Expires=129599&X-Amz-SignedHeaders=content-md5%3Bcontent-
type%3Bhost&uploadId=RSjis.pARzI3IPESBYvxWhcY5ta_ybURr7fnUK4fKBVTTS9cMjyVfG4nmJVAu
O.cQ.K7mSAPpLzLwW7CElIUyFaXnMmCTrr7A2p7r1KG79Q-&partNumber=0&X-Amz-
Signature=f2d555fd64f80e1ba86c8ed0b0eb63a1b184304fcbfde6a91198163df2a67900
*********************************************************
self.startUploadForPresignedURL (presignedURL as URL, chunkURL: fileURL, md5 :
MD5!, MediaName : mediaName, strContentType : contentType, awsPartNumber:
awsPartNumber)
}
return nil
})
}
func startUploadForPresignedURL (_ presignedURL:URL, chunkURL: URL, md5 : String, MediaName : String, strContentType : String, awsPartNumber: Int)
{
let request = NSMutableURLRequest(url: presignedURL)
request.cachePolicy = .reloadIgnoringLocalCacheData
request.timeoutInterval = Date(timeIntervalSinceNow: 36 * 60 * 60).timeIntervalSinceNow
request.httpMethod = "PUT"
request.setValue("public-read", forHTTPHeaderField: "x-amz-acl")
request.setValue(MediaName, forHTTPHeaderField: "filename")
request.setValue(strContentType, forHTTPHeaderField: "Content-Type")
request.setValue(self.md5File(url: chunkURL), forHTTPHeaderField: "Content-MD5")
let uploadTask = self.session?.uploadTask(with: request as URLRequest, fromFile: chunkURL)
uploadTask?.taskDescription = String(awsPartNumber)
uploadTask?.resume()
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
print("\(#function)")
if (error != nil) {
print("didCompleteWithError error: \(String(describing: error?.localizedDescription))")
}
else {
print("didCompleteWithError success: \(String(describing: task.response))")
}
}
错误是:-
<NSHTTPURLResponse: 0x1c4432b60> { URL: https://bucketName.s3-ap-Region.amazonaws.com/xxxxx.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIBZJLCO6SJCZZ7YQ%2F20180812%2Fap-south-1%2Fs3%2Faws4_request&X-Amz-Date=20180812T190423Z&X-Amz-Expires=129599&X-Amz-SignedHeaders=content-md5%3Bcontent-type%3Bhost&uploadId=rtRmP_xSnCVBURpnAnUFSbN5JLy9h11yDyDxtrTmMc9oAFMfIi95hX82bbupk497uIoHtC5tYXezK2fLcHb7fh_aR1win8eiAYCcKakmxvo-&partNumber=17825792&X-Amz-Signature=39d31e9f41371242099164702d329d8e81e6f4b16fabba0ed29507ceabc05130 } { Status Code: 403, Headers {
Connection = (
close
);
"Content-Type" = (
"application/xml"
);
Date = (
"Sun, 12 Aug 2018 19:04:30 GMT"
);
Server = (
AmazonS3
);
"Transfer-Encoding" = (
Identity
);
"x-amz-id-2" = (
"0bmVCpzxQZRVYUSeEKIMrxq0rMd9Ts5eYne7timdoH++ThvvNJo+Wjq9Jhckx/AP1fNiaPhVhqQ="
);
"x-amz-request-id" = (
C171A1AE06D092EF
);
} })
我尝试过不同的选择，但没有一个有效。我也尝试过使用 Alamofire 进行多部分流上传，但出现了同样的错误。我也将这个问题发布到github中的aws-sdk-ios，但他们到目前为止也没有正确的答案。任何帮助将不胜感激。
最佳答案
您应该考虑使用 AWS Mobile iOS SDK 中提供的 TransferUtility，而不是自行实现来执行分段上传。
也就是说，查看您的代码，让我惊讶的一件事是您在上传该部分的请求中设置了 x-amz-acl。该 header 不允许用于某个部分(有关上传部分时所有允许的 header 的列表，请参阅 https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPart.html)，并且可能导致服务器将其作为无效请求拒绝。 x-amz-acl header 应仅包含在 createMultiPart 请求中。 从部分上传中删除该 header ，这应该可以解决 403 错误。
请参阅第 1315 行 ( https://github.com/aws/aws-sdk-ios/blob/7c6c287f5cf0313ef042d34f18b5f82b27298a30/AWSS3/AWSS3TransferUtility.m#L1315 ) 中的代码，了解 TransferUtility 如何为部件创建预签名 URL 并使用 NSURLSessionUploadTask 上传它。
此外，请查看从第 131 行 ( https://github.com/aws/aws-sdk-ios/blob/7c6c287f5cf0313ef042d34f18b5f82b27298a30/AWSS3/AWSS3TransferUtility%2BHeaderHelper.m#L131 ) 开始的代码，了解 TransferUtility 如何查找某些 header 并将其从部分上传中删除的详细信息。
关于ios - 预签名 Url 分段上传始终返回 403，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51955997/