add fetch node

[jtydhr88]

Add one fetch node. Why do we need this node? In certain situations, such as in cloud environments (RunningHub, ComfyDeploy, etc.), users cannot directly access the local disk. For some nodes, like the upcoming Tripo convert node which only provides functionality to save to local storage, in these cases we need to provide a way for users to download these files through ComfyUI's built-in fetch API. Screenshot is

need BE change here https://github.com/comfyanonymous/ComfyUI/pull/8265

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[jtydhr88]

It is not only for Tripo node, but also aim to provide a way to fetch files for any cases on Cloud Platform which not be able to access local disk. In fact we already provide the ability by accessing api url: api/view?filename=xxx to allow users to download file manually, this node is to convert this api url into a node

[webfiltered]

Sounds like it would be good to have! I have a suspicion that this may end up primarily as a sidebar or the like, rather than directly on a node.

[jtydhr88]

I think you mean something like, document on google colab: