fetch() — astro Function Reference

Architecture documentation for the fetch() function in cached-font-fetcher.ts from the astro codebase.

Function typescript CoreAstro RenderingEngine

Entity Profile

CoreAstro→ RenderingEngine→ fetch() — astro Function Reference

Dependency Diagram

graph TD
  1433ecdf_5efc_6b47_6da2_e0c4bcebae21["fetch()"]
  767f384c_0dbf_0041_0eb2_69933f4c7602["CachedFontFetcher"]
  1433ecdf_5efc_6b47_6da2_e0c4bcebae21 -->|defined in| 767f384c_0dbf_0041_0eb2_69933f4c7602
  style 1433ecdf_5efc_6b47_6da2_e0c4bcebae21 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/astro/src/assets/fonts/infra/cached-font-fetcher.ts lines 35–56

	async fetch({ id, url, init }: FontFileData): Promise<Buffer> {
		return await this.#cache(this.#storage, id, async () => {
			try {
				if (isAbsolute(url)) {
					return await this.#readFile(url);
				}
				const response = await this.#fetch(url, init ?? undefined);
				if (!response.ok) {
					throw new Error(`Response was not successful, received status code ${response.status}`);
				}
				return Buffer.from(await response.arrayBuffer());
			} catch (cause) {
				throw new AstroError(
					{
						...AstroErrorData.CannotFetchFontFile,
						message: AstroErrorData.CannotFetchFontFile.message(url),
					},
					{ cause },
				);
			}
		});
	}