@allmaps/stdlib/dist/fetch.js

Allmaps Standard Library

export async function fetchUrl(input, init, fetchFn) {
    let response;
    if (typeof fetchFn === 'function') {
        response = await fetchFn(input, init);
    }
    else {
        response = await fetch(input, init);
    }
    if (!response.ok) {
        const json = await response.json();
        if (json && json.error) {
            throw new Error(json.error);
        }
        else if (response.statusText) {
            throw new Error(response.statusText);
        }
        else if (response.status === 404) {
            throw new Error(`Not found: ${input} (404)`);
        }
        else if (response.status === 500) {
            throw new Error('Internal server error (500)');
        }
        else {
            throw new Error(`Failed to fetch: ${input} (${response.status})`);
        }
    }
    return response;
}
export async function fetchJson(input, init, fetchFn) {
    const response = await fetchUrl(input, init, fetchFn);
    return await response.json();
}
export async function fetchImageInfo(imageUri, init, fetchFn) {
    return await fetchJson(`${imageUri}/info.json`, init, fetchFn);
}
export async function fetchImageBitmap(input, init, fetchFn) {
    const response = await fetchUrl(input, init, fetchFn);
    const blob = await response.blob();
    return await createImageBitmap(blob);
}