@jspm/generator/lib/common/fetch-deno.js

Package Import Map Generation Tool

import { fileURLToPath } from "url";
import { wrappedFetch } from "./fetch-common.js";
export function clearCache() {}
export const fetch = wrappedFetch(async function(url, ...args) {
    const urlString = url.toString();
    if (urlString.startsWith("file:") || urlString.startsWith("data:") || urlString.startsWith("node:")) {
        try {
            let source;
            if (urlString.startsWith("file:")) {
                // @ts-ignore - can only resolve Deno when running in Deno
                source = await Deno.readTextFile(fileURLToPath(urlString));
            } else if (urlString.startsWith("node:")) {
                source = "";
            } else {
                source = decodeURIComponent(urlString.slice(urlString.indexOf(",") + 1));
            }
            return {
                status: 200,
                async text () {
                    return source.toString();
                },
                async json () {
                    return JSON.parse(source.toString());
                },
                arrayBuffer () {
                    return new TextEncoder().encode(source.toString()).buffer;
                }
            };
        } catch (e) {
            if (e.code === "EISDIR") return {
                status: 200,
                async text () {
                    return "";
                },
                async json () {
                    throw new Error("Not JSON");
                },
                arrayBuffer () {
                    return new ArrayBuffer(0);
                }
            };
            if (e.name === "NotFound") return {
                status: 404,
                statusText: e.toString()
            };
            return {
                status: 500,
                statusText: e.toString()
            };
        }
    } else {
        return globalThis.fetch(urlString, ...args);
    }
});


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