terriajs/dist/Core/loadBlob.js

Geospatial data visualization platform.

import Resource from "terriajs-cesium/Source/Core/Resource";
import loadJson from "./loadJson";
import { ZipReader, BlobReader as ZipBlobReader, Data64URIWriter as ZipData64URIWriter, Uint8ArrayWriter as ZipUint8ArrayWriter } from "@zip.js/zip.js";
export default function loadBlob(urlOrResource, headers, body) {
    if (body !== undefined) {
        return Resource.post({
            url: urlOrResource,
            headers: headers,
            data: JSON.stringify(body),
            responseType: "blob"
        });
    }
    else {
        return Resource.fetchBlob({ url: urlOrResource, headers: headers });
    }
}
export function isJson(uri) {
    return /(\.geojson)|(\.json)\b/i.test(uri);
}
export function isZip(uri) {
    return /(\.zip\b)/i.test(uri);
}
/** Get zipjs ZipReader for given Blob */
function getZipReader(blob) {
    return new ZipReader(new ZipBlobReader(blob));
}
/** Parse zipped blob into JsonValue */
export async function parseZipJsonBlob(blob) {
    const reader = getZipReader(blob);
    return reader.getEntries().then(function (entries) {
        for (let i = 0; i < entries.length; i++) {
            const entry = entries[i];
            if (isJson(entry.filename)) {
                return entry.getData(new ZipData64URIWriter()).then(function (uri) {
                    return loadJson(uri);
                });
            }
        }
        return undefined;
    });
}
/** Parse zip Blob and return array of files (as UInt8Array) */
export async function parseZipArrayBuffers(blob) {
    const reader = getZipReader(blob);
    const entries = await reader.getEntries();
    return await Promise.all(entries.map(async (entry) => {
        return entry.directory
            ? { fileName: entry.filename, isDirectory: true }
            : {
                fileName: entry.filename,
                isDirectory: false,
                data: await entry.getData(new ZipUint8ArrayWriter())
            };
    }));
}
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