Re: MsgBase.put_msg_header() failing to save header
By: Nightfox to Digital Man on Mon Aug 15 2016 08:08 pm
> Re: MsgBase.put_msg_header() failing to save header
> By: Digital Man to Nightfox on Wed Aug 10 2016 22:00:02
>
> > >>> Why might put_msg_header() fail?
>
> > DM>> For a number of reasons. Try printing the msgbase.status and
> > DM>> msgbase.error values when whever put_msg_header() fails along with
> > DM>> the parameter values you're passing to put_msg_header(), and then
> > DM>> share the results here. That'll help to isolate the cause of the
> > DM>> error.
>
> >> This is the status and error message I'm getting when it fails to save
> >> the message:
> >> Status: -101
> >> Error: illegal header length increase: 770 (4 blocks) vs 752 (3
> >> blocks)
>
> DM> This means that the modified message header requires more storage
> DM> (blocks in the *.shd file) than what was allocated for the original
> DM> message header. The read header used 752 bytes (3 256-byte blocks) and
> DM> the modified header requires 770 bytes (4 256-byte blocks). Setting the
> DM> "read" attribute should not increase the storage space for a header at
> DM> all, so something else is changing between when you read the header and
> DM> when you're attempting to write it.
>
> My reader script shouldn't do anything that increases the size of the header
> before I write it.
If you don't pass 'false' as the 3rd argument to MsgBase.get_msg_header(), some
header fields are expanded (e.g. missing message-IDs created) and some header
fields which are non-existent or blank in the SMB are created in the JS
instance of the header. So like the JS object model doc says:
"Pass false for the expand_fields argument (default: true) if you will
be re-writing the header later with put_msg_header()"
digital man
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