Support for EventSource

[KolbyML]

I think it would be really nice if Reqwest supported EventSource https://html.spec.whatwg.org/multipage/server-sent-events.html#the-eventsource-interface

The only decent crate I found for it was, https://crates.io/crates/eventsource-client but ideally I would like to use Reqwest directly for this usecase instead of another HTTP crate.

There was an issue made years ago #1224 but it was immediately closed for some reason

There is an extension of Reqwest for EventSource, but the crate hasn't been maintained for a while now https://github.com/viniciusgerevini/sse-client

[Xuanwo]

Hi, thank you @KolbyML for bringing this up. I don't get the point to add this feature directly to reqwest. It seems more like something that could be built on top of reqwest instead.

After reviewing #1224, it seems the main issue is that no one is interested in maintaining this crate. Perhaps you could collaborate with @nab-os and @jpopesculian to help maintain it?

[Zane-XY]

@Xuanwo

The reqwest-eventsource crate treat SSE stream end as an error, which is wrong and not actively maintained.

Providing APIs to consume SSE streams directly is actually one of the most important requirements, especially as AI services become more prevalent and many of them utilize SSE. I’m not sure why you believe this is not directly relevant. Direct SSE support in HTTP clients is common in other language ecosystems—for example, see the Ktor documentation: https://ktor.io/docs/client-server-sent-events.html

[Dangerise]

Surely the SSE is an essential feature for a http client .