Declaration Syntax| C# |
UploadPartResponse UploadPart( UploadPartRequest request )
Parameters- request (UploadPartRequest)
- The UploadPartRequest that defines the parameters of the operation.
Return Value RemarksYou must initiate a multipart upload before you can upload any part.
Your UploadPart request must include an upload ID and a part number. The upload ID is the ID returned by Amazon S3 in response to your Initiate Multipart Upload request. Part number can be any number between 1 and 10,000, inclusive. A part number uniquely identifies a part and also defines its position within the object being uploaded. If you upload a new part using the same part number as an existing part, that part is overwritten.
To ensure data is not corrupted traversing the network, specify the Content-MD5 header in the Upload Part request. Amazon S3 checks the part data against the provided MD5 value. If they do not match, Amazon S3 returns an error.
When you upload a part, the UploadPartResponse response contains an ETag property. You should record this ETag property value and the part number. After uploading all parts, you must send a CompleteMultipartUpload request. At that time Amazon S3 constructs a complete object by concatenating all the parts you uploaded, in ascending order based on the part numbers. The CompleteMultipartUpload request requires you to send all the part numbers and the corresponding ETag values.
After you initiate a multipart upload and upload one or more parts, you must either complete or abort the multipart upload in order to stop getting charged for storage of the uploaded parts. Once you complete or abort the multipart upload, Amazon S3 will release the stored parts and stop charging you for their storage.
Examples
This example shows how to upload 13MB of data using mutlipart upload.
The data is contained in a stream and the upload is done in 3 parts:
5MB, 5MB, then the remainder.
CopyMultipart Upload Sampleint MB = (int)Math.Pow(2, 20); // Create a client AmazonS3Client client = new AmazonS3Client(); // Define input stream Stream inputStream = Create13MBDataStream(); // Initiate multipart upload InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest { BucketName = "SampleBucket", Key = "Item1" }; InitiateMultipartUploadResponse initResponse = client.InitiateMultipartUpload(initRequest); // Upload part 1 UploadPartRequest uploadRequest = new UploadPartRequest { BucketName = "SampleBucket", Key = "Item1", UploadId = initResponse.UploadId, PartNumber = 1, PartSize = 5 * MB, InputStream = inputStream }; UploadPartResponse up1Response = client.UploadPart(uploadRequest); // Upload part 2 uploadRequest = new UploadPartRequest { BucketName = "SampleBucket", Key = "Item1", UploadId = initResponse.UploadId, PartNumber = 2, PartSize = 5 * MB, InputStream = inputStream }; UploadPartResponse up2Response = client.UploadPart(uploadRequest); // Upload part 3 uploadRequest = new UploadPartRequest { BucketName = "SampleBucket", Key = "Item1", UploadId = initResponse.UploadId, PartNumber = 3, InputStream = inputStream }; UploadPartResponse up3Response = client.UploadPart(uploadRequest); // List parts for current upload ListPartsRequest listPartRequest = new ListPartsRequest { BucketName = "SampleBucket", Key = "Item1", UploadId = initResponse.UploadId }; ListPartsResponse listPartResponse = client.ListParts(listPartRequest); Debug.Assert(listPartResponse.Parts.Count == 3); // Complete the multipart upload CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest { BucketName = "SampleBucket", Key = "Item1", UploadId = initResponse.UploadId, PartETags = new List<PartETag> { new PartETag { ETag = up1Response.ETag, PartNumber = 1 }, new PartETag { ETag = up2Response.ETag, PartNumber = 2 }, new PartETag { ETag = up3Response.ETag, PartNumber = 3 } } }; CompleteMultipartUploadResponse compResponse = client.CompleteMultipartUpload(compRequest);