Improve instance detection
Instance detection is now based on NodeInfo, which is standardized and lighterweight.
This commit is contained in:
Nikita Karamov
parent
6d4eca0131
commit
2ad24a91da
2 changed files with 146 additions and 182 deletions
146
src/pages/api/detect/[domain].ts
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146
src/pages/api/detect/[domain].ts
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/*!
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* © 2023 Nikita Karamov
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* Licensed under AGPL v3 or later
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*/
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import type { APIRoute } from "astro";
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import { FediverseProject } from "../../../constants";
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import { normalizeURL } from "../../../util";
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interface FediverseProjectData {
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publishEndpoint: string;
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params: {
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text: string;
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};
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}
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const PROJECTS: Map<FediverseProject, FediverseProjectData> = new Map([
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[
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FediverseProject.Mastodon,
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{
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publishEndpoint: "share",
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params: {
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text: "text",
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},
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},
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],
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[
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FediverseProject.GNUSocial,
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{
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publishEndpoint: "/notice/new",
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params: {
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text: "status_textarea",
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},
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},
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],
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[
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FediverseProject.Pleroma,
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{
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publishEndpoint: "share",
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params: {
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text: "message",
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},
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},
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],
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[
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FediverseProject.Friendica,
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{
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publishEndpoint: "compose",
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params: {
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text: "body",
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},
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},
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],
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[
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FediverseProject.Hubzilla,
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{
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publishEndpoint: "rpost",
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params: {
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text: "body",
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},
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},
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],
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[
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FediverseProject.Misskey,
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{
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publishEndpoint: "share",
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params: {
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text: "text",
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},
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},
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],
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]);
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interface NodeInfoList {
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links: {
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rel: string;
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href: string;
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}[];
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}
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interface NodeInfo {
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[key: string]: unknown;
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software: {
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[key: string]: unknown;
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name: string;
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};
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}
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type NonEmptyArray<T> = [T, ...T[]];
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function isNotEmpty<T>(array: T[]): array is NonEmptyArray<T> {
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return array.length > 0;
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}
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const checkNodeInfo = async (domain: string): Promise<FediverseProject> => {
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const nodeInfoListUrl = new URL(
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"/.well-known/nodeinfo",
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normalizeURL(domain),
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);
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const nodeInfoListResponse = await fetch(nodeInfoListUrl);
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const nodeInfoList = (await nodeInfoListResponse.json()) as NodeInfoList;
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if (isNotEmpty(nodeInfoList.links)) {
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const nodeInfoUrl = nodeInfoList.links[0].href;
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const nodeInfoResponse = await fetch(nodeInfoUrl);
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const nodeInfo = (await nodeInfoResponse.json()) as NodeInfo;
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return nodeInfo.software.name as FediverseProject;
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} else {
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throw new Error(`No nodeinfo found for ${domain}`);
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}
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};
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export const get: APIRoute = async ({ params }) => {
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const domain = params.domain as string;
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try {
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const projectId = await checkNodeInfo(domain);
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if (!PROJECTS.has(projectId)) {
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throw new Error(`Unexpected project ID: ${projectId}`);
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}
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const projectData = PROJECTS.get(projectId) as FediverseProjectData;
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return new Response(
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JSON.stringify({
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host: domain,
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project: projectId,
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publishEndpoint: projectData.publishEndpoint,
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params: projectData.params,
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}),
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{
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status: 200,
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headers: {
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"Cache-Control": "s-maxage=86400, max-age=86400, public",
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"Content-Type": "application/json",
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},
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},
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);
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} catch {
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return new Response(JSON.stringify({ error: "Couldn't detect instance" }), {
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status: 404,
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headers: {
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"Content-Type": "application/json",
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},
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});
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}
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};
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@ -1,182 +0,0 @@
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/*!
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* © 2023 Nikita Karamov
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* Licensed under AGPL v3 or later
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*/
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import type { APIRoute } from "astro";
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import { normalizeURL } from "../../../util";
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interface FediverseProjectBasic {
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publishEndpoint: string;
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params: {
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text: string;
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};
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}
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interface FediverseProjectCheckFunction extends FediverseProjectBasic {
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check: (url: string) => Promise<string>;
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}
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interface FediverseProjectCheckUrl extends FediverseProjectBasic {
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checkUrl: string;
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}
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type FediverseProject =
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| FediverseProjectCheckUrl
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| FediverseProjectCheckFunction;
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const PROJECTS: Map<string, FediverseProject> = new Map([
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[
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"mastodon",
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{
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checkUrl: "/api/v1/instance/rules",
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publishEndpoint: "share",
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params: {
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text: "text",
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},
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},
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],
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[
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"gnuSocial",
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{
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checkUrl: "/api/gnusocial/config.xml",
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publishEndpoint: "/notice/new",
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params: {
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text: "status_textarea",
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},
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},
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],
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[
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"pleroma",
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{
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checkUrl: "/api/v1/pleroma/federation_status",
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publishEndpoint: "share",
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params: {
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text: "message",
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},
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},
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],
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[
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"friendica",
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{
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checkUrl: "/api/statusnet/config",
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publishEndpoint: "compose",
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params: {
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text: "body",
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},
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},
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],
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[
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"hubzilla",
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{
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check: async (url: string): Promise<string> => {
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const response = await fetch(url);
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const htmlBody = await response.text();
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console.debug(htmlBody);
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if (
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htmlBody.includes(
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'<meta name="application-name" content="hubzilla" />',
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)
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) {
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return "hubzilla";
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}
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throw new Error(`${url} doesn't host Hubzilla`);
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},
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checkUrl: "/.well-known/zot-info",
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publishEndpoint: "rpost",
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params: {
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text: "body",
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},
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},
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],
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[
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"misskey",
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{
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check: async (url: string): Promise<string> => {
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const response = await fetch(new URL("/api/meta", url), {
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method: "POST",
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headers: {
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Accept: "application/json",
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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detail: false,
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}),
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});
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const metadata = await response.json();
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if (metadata.version) {
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return "misskey";
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}
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throw new Error(`${url} doesn't host Misskey`);
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},
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checkUrl: "/",
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publishEndpoint: "share",
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params: {
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text: "text",
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},
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},
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],
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]);
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const checkProjectUrl = (
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urlToCheck: URL,
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projectId: string,
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): Promise<string> => {
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return new Promise((resolve, reject) => {
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fetch(urlToCheck)
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.then((response) => {
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if (response.ok) {
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resolve(projectId);
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} else {
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reject(urlToCheck);
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}
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})
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.catch((error) => {
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reject(error.toString());
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});
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});
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};
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export const get: APIRoute = async ({ params }) => {
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const host = params.host as string;
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const promises = [...PROJECTS.entries()].map(([service, project]) => {
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const url = normalizeURL(host);
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if (project.check !== undefined) {
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return project.check(url);
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}
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return checkProjectUrl(new URL(project.checkUrl, url), service);
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});
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try {
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const projectId = await Promise.any(promises);
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if (!PROJECTS.has(projectId)) {
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throw new Error(`Unexpected project ID: ${projectId}`);
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}
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const project = PROJECTS.get(projectId) as FediverseProject;
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return new Response(
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JSON.stringify({
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host,
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project: projectId,
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publishEndpoint: project.publishEndpoint,
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params: project.params,
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}),
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{
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status: 200,
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headers: {
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"Cache-Control": "s-maxage=86400, max-age=86400, public",
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"Content-Type": "application/json",
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},
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},
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);
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} catch {
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return new Response(JSON.stringify({ error: "Couldn't detect instance" }), {
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status: 404,
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headers: {
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"Content-Type": "application/json",
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},
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});
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}
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};
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