Capacity of the plugin channels

Plugins Plugin Development
1

Hi,

I’m currently thinking about the communication between my plugin and my mod. I would like to know if this is a good idea to upload a file through the plugin channel system or I should use my own way to exchange files between the server and the client?

2

Hmm… Well it’s just using the MC packet system, so I don’t see why not. All you need is a byte array representation of your file.

I’m not actually sure if there’s some inherent maximum size for the channels system, so I’ll leave that for someone else to answer.

3

The vanilla packet allows up to 0x100000 (2**20, 1048576) which is a 20-bit integer

However, in Forge, Forge allows more data to be sent using a multipart packet (over the channel FML|MP), in this case, Forge will send multiple S3FPacketCustomPayload packets and reconstruct on the other side.
This mulitpart packet allows for a maximum of 4278169680 bytes (I got this from FMLProxyPacket.MAX_LENGTH) however it will only work for Forge <–> Forge server communication (this includes SpongeForge)

I would not suggest sending large files as this could block the network for a short time while the data is written/read and processed. But IDK if it’s a problem as I’ve never had a mod send a large chunk of data at a time.

4

Thanks for the reply, the files uploaded through the network are small(less than 1mb), I don’t think that will block the network.

Thanks @simon816.