Writing at offset=0 using REST API fails for empty files

[derkades]

Trying to write a single byte at offset 0 to an empty SDMF file:

FILE_CAP=$(curl -X PUT 'http://10.0.1.1:26551/uri?format=sdmf')
curl -X PUT --data a "http://10.0.1.1:26551/uri/$FILE_CAP?offset=0" > error1.html

or MDMF:

FILE_CAP=$(curl -X PUT 'http://10.0.1.1:26551/uri?format=mdmf')
curl -X PUT --data a "http://10.0.1.1:26551/uri/$FILE_CAP?offset=0" > error2.html

Please find error files attached.

No offset works:

curl -X PUT --data a "http://10.0.1.1:26551/uri/$FILE_CAP"

Now that the file contains 1 byte ('a'), we can write at offset=1 to make it 2 bytes long ('aa'):

curl -X PUT --data a "http://10.0.1.1:26551/uri/$FILE_CAP?offset=1"

Also overwriting the first byte seems to work, but actually overwrites the entire file (unrelated issue?):

curl -X PUT --data b "http://10.0.1.1:26551/uri/$FILE_CAP?offset=1"

The file now contains 'b', while I would expect 'ba'.

[derkades]

SDMF error

[derkades]

MDMF error