[Feature Enhancement]: Add a URL-returning overload of `getBlob(from:cid:)`

オープン
#337 コメント 3 件 リアクション 0 件 担当者 0 名 GitHub で見る

まだ誰も着手していません。

評価

難易度
4/5
見積もり時間
1〜2日
初心者へのやさしさ
52/100
issue の種類
機能追加
明瞭さ
おおむね明確
活発さ
静か
技術スタック
swift

調査の方向性

Start by reading the existing getBlob(from:cid:) implementation and the account PDS endpoint resolution discussed in issue #319. Add a synchronous overload that builds a URL using the resolved PDS endpoint and the supplied DID and CID; done means callers can obtain a URL without downloading the blob as Data. The issue names no relevant test file, so locate tests for getBlob and endpoint resolution before making the change.

索引モデルが issue の本文から書いたものです。

説明

enhancement
Summary

getBlob(from:cid:) currently returns Data via an async throws call, which is appropriate for saving or exporting a blob. However, display-oriented APIs such as SwiftUI's AsyncImage and AVPlayer require a URL, not Data. A synchronous URL-building overload with the same name would cover this use case without an additional download.

Pain points

Callers that only need a URL for playback or image loading are forced to either:

  • Download the full blob as Data and convert it to UIImage/NSImage — wasting memory and blocking the async task before display can begin, or
  • Construct the URL manually from the PDS endpoint string, bypassing the typed API.

Concrete cases where a URL is required by the consuming API:

  • SwiftUI AsyncImage(url:) — displays a blob image (thumbnail, avatar stored as blob, etc.) with built-in lazy loading and caching. Accepts URL, not Data.
  • AVPlayer(url:) — streams a video blob for playback. AVPlayer must be initialised with a URL; passing Data is not supported.
Considered Alternatives

Keeping a raw helper that builds the URL from a PDS endpoint string — this works but lives outside the typed API and requires the caller to manage the endpoint separately.

Is this a breaking change?

No

Additional Context

The com.atproto.sync.getBlob lexicon specifies "output": { "encoding": "*/*" } and notes it is implemented by PDS. The URL-returning overload should therefore resolve the account's PDS endpoint rather than hardcoding a relay (see #319).

The new synchronous overload can construct the correct URL from the resolved PDS endpoint and the provided DID/CID query parameters.
Proposed addition:

public func getBlob(from accountDID: String, cid: String) -> URL?

Swift disambiguates the two overloads at the call site: the existing async throws form is chosen when the caller writes try await, and the new synchronous form is chosen when a URL? is expected without await.

主要言語
Swift
スター
226
フォーク
40
平均マージ
5時間 8分
マージ済み PR(30日)
3

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

MasterJ93/ATProtoKit のほかの issue

MasterJ93/ATProtoKit の issue をすべて見る

似ている issue

Swift の issue をもっと見る

新しい issue をメールで受け取る

初心者向けの GitHub issue を短くまとめたダイジェスト。