send message with multiple attachment

[junaidmgithub]

i am having issue with send message with multiple attachment.
only first attachment is taken. rest not coming to signal

[babbisch]

How do you set the command?

Try
send RECEPIENT -a /path/to/image1.png /path/to/images2.png
worked for me

[johnfreed]

I am having the same issue. It doesn't always choose the first attachment; when I send three attachments, and vary the order, it always sends the same one attachment. I have done some debugging to determine that everything is working well (all three attachments make it to sendMessage() in Manager.java. Unfortunately I don't have the skills to determine what happens after that.

In AttachmentUtils.java, there is a createAttachment() method that uses a nonstandard (deprecated?) protocol to send to the Signal servers. It uses a resumableUploadSpec, for example, which exists nowhere in the current API so far as I can tell. So at that point I'm stumped.

I'm using signal-cli on Fedora 34, openjdk-11.0.9-5

[johnfreed]

More information: The same thing happens when I use the "dbus-send" (raw) command:

dbus-send --session --type=method_call --print-reply --dest="org.asamk.Signal" /org/asamk/Signal org.asamk.Signal.sendMessage string:'Here is a message' array:string:'file1.pdf','file2.jpeg','file3.png' string:'+33000000000'

[johnfreed]

I'm wondering if the problem might be at the smartphone client. I'm using the official Signal app for Android.

[AsamK]

That could be it, as far as I know, the official clients only support multiple image attachments. Multiple attachments of different types are not supported

[johnfreed]

Some more evidence to support the idea that it's a Signal smartphone problem.

I sent 3 PNG files, all were received fine.

Sent 2 PNG and 1 JPG, all were received fine.

Sent 2 PNG and 1 PDF file, only the PDF was received.

[johnfreed]

It appears that Signal processes images differently from other attachments. Specifically, for an image, the name is removed and replaced by an arbitrary string of characters, with no indication of MIME type or former file extension (.JPG, .PNG, etc.)

Other attachments, however, are sent along with their MIME type and original filename intact. It seems as if you can't mix and match these in the same send command.