Downloading files from S3 plugin and using it

General
1

Hello, i’m using the AWS S3 Storage plugin from the latest orthanc.

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But when I try to manually download files from the bucket and upload it in another Orthanc or just use dcmdump to see the files content, i got errors.

csvmigrator-1  | Downloading file: s3://jpc-test-bucket/6ad603a2-7be5-4351-b88f-5116b9fdb3e3.dcm
csvmigrator-1  | Uploading file to Orthanc...
orthanc-1      | I0612 14:28:57.195479 HttpServer.cpp:1262] (http) POST /instances
orthanc-1      | I0612 14:28:57.195688 OrthancRestApi.cpp:163] (http) Receiving a DICOM file of 233826 bytes through HTTP
orthanc-1      | W: DcmItem: Length of element (9c78,77c4) is odd
orthanc-1      | E: DcmElement: Unknown Tag & Data (9c78,77c4) larger (3449575541) than remaining bytes (233810) in file, premature end of stream
orthanc-1      | E0612 14:28:57.196145 OrthancException.cpp:61] Bad file format: Cannot parse an invalid DICOM file (size: 233826 bytes)

❯ dcmdump 0cf7c239-a54d-4808-a09d-c120f9fe9e07.dcm
W: DcmItem: Length of element (9c78,77c4) is odd
E: DcmElement: Unknown Tag & Data (9c78,77c4) larger (3449575541) than remaining bytes in file
W: DcmItem: Dataset not in ascending tag order, at element (9c78,77c4)
E: dcmdump: I/O suspension or premature end of stream: reading file: 0cf7c239-a54d-4808-a09d-c120f9fe9e07.dcm
2

Hi,

It seems you have enabled StorageCompression so the files are compressed. You must then use OrthancRecoverCompressedFile to uncompress them. You can download it from here.

The most generic way to retrieve a file is to use the Orthanc Rest API http://localhost:8042/instance/{id}/file

HTH,

Alain

1 Like
3

Hi Alain,

I got it! Thanks for the help!

João