stream: support more options

[legendecas]

Support following construction options for stream

• [ ] objectMode
• [ ] decodeStrings

[Txiaozhe]

Can you assign it to me? I will try! Thanks:)

[legendecas]

Can you assign it to me? I will try! Thanks:)

Yes, definitely

[Txiaozhe]

Thanks!:)

[yorkie]

@Txiaozhe we could discuss here, the object mode is designed for writing stuffs in buffer/string, and create pipelines for object processing. Thus we should take a look at how object mode works in ShadowNode, if that implementation takes too much memory or performance, I think we should reconsider this feature :)

[Txiaozhe]

I have read some source code about stream module of ShadowNode, but I didn't find anything special with node except it is not perfect yet. If we keep it's data struct in array, I think it is not very appropriate to do some slow operate. And if there are few practical scenarios for objectNode option, I think we could shelve it temporary!

[yorkie]

Array is simpler than linked one, the linked object should take more memory.

[Txiaozhe]

Yeah, stream of ShadowNode is simpler and more resource-efficient, so if there are few practical scenarios for objectNode option, I think we could shelve it temporary