# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/td7pwra
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解析 Golang sync-Once 用法和原理**
Once is an object that will perform exactly one action.sync.Once 是 Go 標準庫提供的使函數只執行一次的實現，常應用於單例模式，例如初始化配置、保持數據庫連接等。它可以在代碼的任意位置初始化和調用，因此可以延遲到使用時再執行，併發場景下是線程安全的。對外接口Once 對外僅暴露了唯一的方法 Do(f func())，f 爲需要執行的 ⌘ Read more