Add host detection
This re-implements the posting that was achieved in v3.
This commit is contained in:
Nikita Karamov
parent
2301f2dc32
commit
378351a5d8
3 changed files with 94 additions and 110 deletions
102
api/share.js
102
api/share.js
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@ -1,102 +0,0 @@
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/*!
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share2fedi - Instance-agnostic share page for the Fediverse.
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Copyright (C) 2020-2023 Nikita Karamov <me@kytta.dev>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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import http from "http";
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import https from "https";
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const pathsMap = {
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mastodon: {
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checkUrl: "/api/v1/instance/rules",
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postUrl: "share",
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textParam: "text",
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},
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gnuSocial: {
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checkUrl: "/api/statusnet/version.xml",
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postUrl: "/notice/new",
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textParam: "status_textarea",
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},
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pleroma: {
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checkUrl: "/api/v1/pleroma/federation_status",
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postUrl: "share",
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textParam: "message",
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},
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};
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const queryUrl = (url, service) => {
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return new Promise((resolve, reject) => {
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const get = url.protocol === "https:" ? https.get : http.get;
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get(url, ({ statusCode }) => {
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if (statusCode === 200) {
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console.debug(url.href, "is", service);
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resolve(service);
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} else {
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reject(url);
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}
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}).on("error", (error) => {
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reject(error);
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});
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});
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};
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const detectService = async (instanceURL) => {
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const checkPromises = Object.entries(pathsMap).map(
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([service, { checkUrl }]) =>
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queryUrl(new URL(checkUrl, instanceURL), service),
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);
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return await Promise.any(checkPromises);
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};
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const requestListener = async (request, response) => {
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if (request.method !== "POST") {
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response.writeHead(405).end();
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return;
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}
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let data = "";
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request.on("data", (chunk) => {
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data += chunk.toString();
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});
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request.on("end", () => {
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const requestBody = new URLSearchParams(data);
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const postText = requestBody.get("text") || "";
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const instanceURL =
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requestBody.get("instance") || "https://mastodon.social/";
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detectService(instanceURL)
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.then((service) => {
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const publishUrl = new URL(pathsMap[service].postUrl, instanceURL);
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publishUrl.search = new URLSearchParams([
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[pathsMap[service].textParam, postText],
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]);
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response.writeHead(303, { Location: publishUrl.toString() }).end();
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})
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.catch((error) => {
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response.writeHead(400).end(error);
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});
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});
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};
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if (!import.meta.env || import.meta.env.PROD) {
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http.createServer(requestListener).listen(8080);
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}
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export const viteNodeApp = requestListener;
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78
src/pages/api/detect/[host].ts
Normal file
78
src/pages/api/detect/[host].ts
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@ -0,0 +1,78 @@
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import { APIRoute } from "astro";
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import { normalizeURL } from "../../../util";
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const PROJECTS = {
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mastodon: {
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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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gnuSocial: {
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checkUrl: "/api/statusnet/version.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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pleroma: {
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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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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;
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const promises = Object.entries(PROJECTS).map(([service, { checkUrl }]) =>
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checkProjectUrl(new URL(checkUrl, normalizeURL(host)), service),
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);
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try {
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const project = await Promise.any(promises);
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return new Response(
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JSON.stringify({
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host,
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project,
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publishEndpoint: PROJECTS[project].publishEndpoint,
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params: PROJECTS[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: 400,
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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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@ -1,16 +1,24 @@
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import { APIRoute } from "astro";
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export const post: APIRoute = async ({ redirect, request }) => {
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export const post: APIRoute = async ({ redirect, request, url }) => {
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const formData = await request.formData();
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const text = (formData.get("text") as string) || "";
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const instanceDomain =
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const instanceHost =
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(formData.get("instance") as string) || "mastodon.social";
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const publishUrl = new URL("/share", `https://${instanceDomain}/`);
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publishUrl.search = new URLSearchParams({
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text,
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}).toString();
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return redirect(publishUrl.toString(), 303);
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try {
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const response = await fetch(new URL(`/api/detect/${instanceHost}`, url));
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const { host, publishEndpoint, params } = await response.json();
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const publishUrl = new URL(publishEndpoint, `https://${host}/`);
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publishUrl.search = new URLSearchParams([[params.text, text]]).toString();
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return redirect(publishUrl.toString(), 303);
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} catch {
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return new Response(JSON.stringify({ error: "Couldn't detect instance" }), {
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status: 400,
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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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