falconry/falcon

ASGI: Add affordances and recipe for long-polling

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#1,808 建立於 2020年12月12日

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描述

The 3.0 ASGI implementation already affords long-polling, but it would be useful to provide a recipe to demonstrate the pattern in the context of a Falcon app.

Also, for the sake of efficiency, we may want to provide a req.wait_disconnect() or similar method that can be executed in a background task within a responder. The responder could then use this in order to detect if it should abandon a long-poll early in the case that the client bails out. This is similar to what asgi.App does when streaming SSE's (using watch_disconnect().

貢獻者指南

技術棧
pythonrest api
領域
backendapi
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
3-5 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
Python experienceFalcon basicsASGI conceptsLong polling patterns
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
35
研究方向
Review the existing ASGI implementation in Falcon, particularly the 'asgi.App' class and its 'watch disconnect' method. Examine the issue comments for further design discussions. Determine the signature and behavior of a proposed 'req.wait disconnect()' method and document a recipe for implementing long polling in a Falcon application.