refactor widget api design

this passes all widget API calls through the backend, with a pluggable design and reusable API handlers

src/utils/api-helpers.js

@@ -0,0 +1,34 @@
+const formats = {
+  emby: `{url}/emby/{endpoint}?api_key={key}`,
+  pihole: `{url}/admin/{endpoint}`,
+  radarr: `{url}/api/v3/{endpoint}?apikey={key}`,
+  sonarr: `{url}/api/v3/{endpoint}?apikey={key}`,
+  speedtest: `{url}/api/{endpoint}`,
+  tautulli: `{url}/api/v2?apikey={key}&cmd={endpoint}`,
+  traefik: `{url}/api/{endpoint}`,
+  portainer: `{url}/api/endpoints/{env}/{endpoint}`,
+  rutorrent: `{url}/plugins/httprpc/action.php`,
+  jellyseerr: `{url}/api/v1/{endpoint}`,
+  ombi: `{url}/api/v1/{endpoint}`,
+  npm: `{url}/api/{endpoint}`,
+};
+
+export function formatApiCall(api, args) {
+  const match = /\{.*?\}/g;
+  const replace = (match) => {
+    const key = match.replace(/\{|\}/g, "");
+    return args[key];
+  };
+
+  return formats[api].replace(match, replace);
+}
+
+export function formatApiUrl(widget, endpoint) {
+  const params = new URLSearchParams({
+    type: widget.type,
+    group: widget.service_group,
+    service: widget.service_name,
+    endpoint,
+  });
+  return `/api/services/proxy?${params.toString()}`;
+}

src/utils/http.js

@@ -44,3 +44,20 @@ export function httpRequest(url, params) {
     request.end();
   });
 }
+
+export function httpProxy(url, params = {}) {
+  const constructedUrl = new URL(url);
+
+  if (constructedUrl.protocol === "https:") {
+    const httpsAgent = new https.Agent({
+      rejectUnauthorized: false,
+    });
+
+    return httpsRequest(constructedUrl, {
+      agent: httpsAgent,
+      ...params,
+    });
+  } else {
+    return httpRequest(constructedUrl, params);
+  }
+}

src/utils/proxies/credentialed.js

@@ -0,0 +1,28 @@
+import { getServiceWidget } from "utils/service-helpers";
+import { formatApiCall } from "utils/api-helpers";
+import { httpProxy } from "utils/http";
+
+export default async function credentialedProxyHandler(req, res) {
+  const { group, service, endpoint } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const url = new URL(formatApiCall(widget.type, { endpoint, ...widget }));
+      const [status, contentType, data] = await httpProxy(url, {
+        withCredentials: true,
+        credentials: "include",
+        headers: {
+          "X-API-Key": `${widget.key}`,
+          "Content-Type": "application/json",
+        },
+      });
+
+      res.setHeader("Content-Type", contentType);
+      return res.status(status).send(data);
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}

src/utils/proxies/generic.js

@@ -0,0 +1,21 @@
+import { getServiceWidget } from "utils/service-helpers";
+import { formatApiCall } from "utils/api-helpers";
+import { httpProxy } from "utils/http";
+
+export default async function genericProxyHandler(req, res) {
+  const { group, service, endpoint } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const url = new URL(formatApiCall(widget.type, { endpoint, ...widget }));
+      const [status, contentType, data] = await httpProxy(url);
+
+      res.setHeader("Content-Type", contentType);
+      return res.status(status).send(data);
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}

src/utils/proxies/npm.js

@@ -0,0 +1,37 @@
+import { getServiceWidget } from "utils/service-helpers";
+import { formatApiCall } from "utils/api-helpers";
+
+export default async function npmProxyHandler(req, res) {
+  const { group, service, endpoint } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const url = new URL(formatApiCall(widget.type, { endpoint, ...widget }));
+
+      const loginUrl = `${widget.url}/api/tokens`;
+      const body = { identity: widget.username, secret: widget.password };
+
+      const authResponse = await fetch(loginUrl, {
+        method: "POST",
+        body: JSON.stringify(body),
+        headers: {
+          "Content-Type": "application/json",
+        },
+      }).then((response) => response.json());
+
+      const apiResponse = await fetch(url, {
+        method: "GET",
+        headers: {
+          "Content-Type": "application/json",
+          Authorization: "Bearer " + authResponse.token,
+        },
+      }).then((response) => response.json());
+
+      return res.send(apiResponse);
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}

src/utils/proxies/nzbget.js

@@ -0,0 +1,39 @@
+import { JSONRPCClient } from "json-rpc-2.0";
+import { getServiceWidget } from "utils/service-helpers";
+
+export default async function nzbgetProxyHandler(req, res) {
+  const { group, service, endpoint } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const constructedUrl = new URL(widget.url);
+      constructedUrl.pathname = "jsonrpc";
+
+      const authorization = Buffer.from(`${widget.username}:${widget.password}`).toString("base64");
+
+      const client = new JSONRPCClient((jsonRPCRequest) =>
+        fetch(constructedUrl.toString(), {
+          method: "POST",
+          headers: {
+            "content-type": "application/json",
+            authorization: `Basic ${authorization}`,
+          },
+          body: JSON.stringify(jsonRPCRequest),
+        }).then(async (response) => {
+          if (response.status === 200) {
+            const jsonRPCResponse = await response.json();
+            return client.receive(jsonRPCResponse);
+          } else if (jsonRPCRequest.id !== undefined) {
+            return Promise.reject(new Error(response.statusText));
+          }
+        })
+      );
+
+      return res.send(await client.request(endpoint));
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}

src/utils/proxies/rutorrent.js

@@ -0,0 +1,30 @@
+import RuTorrent from "rutorrent-promise";
+
+import { getServiceWidget } from "utils/service-helpers";
+
+export default async function rutorrentProxyHandler(req, res) {
+  const { group, service } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const constructedUrl = new URL(widget.url);
+
+      const rutorrent = new RuTorrent({
+        host: constructedUrl.hostname,
+        port: constructedUrl.port,
+        path: constructedUrl.pathname,
+        ssl: constructedUrl.protocol === "https:",
+        username: widget.username,
+        password: widget.password,
+      });
+
+      const data = await rutorrent.get(["d.get_down_rate", "d.get_up_rate", "d.get_state"]);
+
+      return res.status(200).send(data);
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}

src/utils/service-helpers.js

@@ -0,0 +1,33 @@
+import { promises as fs } from "fs";
+import path from "path";
+import yaml from "js-yaml";
+
+export async function getServiceWidget(group, service) {
+  const servicesYaml = path.join(process.cwd(), "config", "services.yaml");
+  const fileContents = await fs.readFile(servicesYaml, "utf8");
+  const services = yaml.load(fileContents);
+
+  // map easy to write YAML objects into easy to consume JS arrays
+  const servicesArray = services.map((group) => {
+    return {
+      name: Object.keys(group)[0],
+      services: group[Object.keys(group)[0]].map((entries) => {
+        return {
+          name: Object.keys(entries)[0],
+          ...entries[Object.keys(entries)[0]],
+        };
+      }),
+    };
+  });
+
+  const serviceGroup = servicesArray.find((g) => g.name === group);
+  if (serviceGroup) {
+    const serviceEntry = serviceGroup.services.find((s) => s.name === service);
+    if (serviceEntry) {
+      const { widget } = serviceEntry;
+      return widget;
+    }
+  }
+
+  return false;
+}