Stream zip downloads to the browser

[SZEINER]

Description

After choosing the method to download zip, tar.gz, nothing happens for larger projects and it looks like the preparation took a long time.

Gitea Version

1.19.3

Can you reproduce the bug on the Gitea demo site?

No

Log Gist

No response

Screenshots

No response

Git Version

1.19.3

Operating System

Windows 10

How are you running Gitea?

Runing under instance

Database

MySQL

[silverwind]

I think the operation can be improved to immediately deliver a response with transfer-encoding: chunked and "pipe" the data stream into the response. That will give instantaneous reaction in the browser, at the cost that the browser can no longer show a progress bar on the download because final size is not yet determined.

[silverwind]

Note, I'm not sure if transfer-encoding: chunked is the right way, Wikipedia says HTTP2 does not support it. But the basic idea is the same, don't set a content-size and immediately start delivering bytes while the zipping is still in-progress on the server.

[SZEINER]

I think the operation can be improved to immediately deliver a response with transfer-encoding: chunked and "pipe" the data stream into the response. That will give instantaneous reaction in the browser, at the cost that the browser can no longer show a progress bar on the download because final size is not yet determined.

That is great idea how fix that.

[silverwind]

Fixed with #35487.