72 lines
2.3 KiB
TypeScript
72 lines
2.3 KiB
TypeScript
import type {Specs} from "@/urlmaker/specs.ts";
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import {b64decode, b64encode, compress, decompress, decompressString} from "@/urlmaker/utils.ts";
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import {rssalchemy as pb} from '@/urlmaker/proto/specs.ts';
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const apiBase = import.meta.env.VITE_API_BASE || document.location.origin;
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const renderEndpoint = '/api/v1/render/'; // trailing slash
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const screenshotEndpoint = '/api/v1/screenshot'; // no trailing slash
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export const presetPrefix = 'rssalchemy:';
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export async function decodeUrl(url: string): Promise<Specs> {
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const splitUrl = url.split(renderEndpoint);
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if(splitUrl.length !== 2) {
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throw 'Split failed';
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}
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let encodedData = splitUrl[1];
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return decodeSpecsPart(encodedData);
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}
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export async function decodePreset(preset: string): Promise<Specs> {
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if(!preset.startsWith(presetPrefix)) {
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throw 'Invalid preset';
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}
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let encodedData = preset.substring(presetPrefix.length);
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return decodeSpecsPart(encodedData);
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}
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export async function decodeSpecsPart(encodedData: string): Promise<Specs> {
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console.log('Decoded data len=' + encodedData.length);
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const m = encodedData.match(/(\d*):?([A-Za-z0-9+/=]+)/);
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if(!m) {
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throw 'Regex failed';
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}
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const version = m[1] ? parseInt(m[1]) : 0;
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console.log('Decoding url using version: ' + version);
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encodedData = m[2];
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let buf = b64decode(encodedData);
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switch (version) {
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case 0:
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const jsonData = await decompressString(buf);
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return JSON.parse(jsonData);
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case 1:
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const data = await decompress(buf);
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//@ts-ignore
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return pb.Specs.deserializeBinary(data).toObject();
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default:
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throw 'Unknown version'
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}
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}
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export async function encodeUrl(specs: Specs): Promise<string> {
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return `${apiBase}${renderEndpoint}${await encodeSpecsPart(specs)}`
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}
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export async function encodePreset(specs: Specs): Promise<string> {
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return `${presetPrefix}${await encodeSpecsPart(specs)}`;
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}
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export async function encodeSpecsPart(specs: Specs): Promise<string> {
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const pbSpecs = pb.Specs.fromObject(specs);
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let data = pbSpecs.serializeBinary();
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data = await compress(data);
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const encodedData = b64encode(data);
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console.log('Encoded data len=' + encodedData.length);
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const version = 1;
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return `${version}:${encodedData}`;
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}
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export function getScreenshotUrl(url: string): string {
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return `${apiBase}${screenshotEndpoint}?url=${encodeURIComponent(url)}`;
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}
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