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Fix Transmission proxy error with URL and CSRF caching

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Jason Fischer 2022-09-28 08:56:43 -07:00
parent 69adb3fde2
commit 1ea8e38372
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1 changed files with 25 additions and 6 deletions
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31
src/widgets/transmission/proxy.js
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@ -1,21 +1,39 @@
import cache from "memory-cache";
import { httpProxy } from "utils/proxy/http";
import { formatApiCall } from "utils/proxy/api-helpers";
import getServiceWidget from "utils/config/service-helpers";
import createLogger from "utils/logger";
import widgets from "widgets/widgets";
const proxyName = "transmissionProxyHandler";
const headerCacheKey = `${proxyName}__headers`;
const logger = createLogger(proxyName);
export default async function transmissionProxyHandler(req, res) {
const { group, service, endpoint } = req.query;
if (!group || !service) {
logger.debug("Invalid or missing service '%s' or group '%s'", service, group);
return res.status(400).json({ error: "Invalid proxy service type" });
}
const widget = await getServiceWidget(group, service);
if (!widget) {
logger.debug("Invalid or missing widget for service '%s' in group '%s'", service, group);
return res.status(400).json({ error: "Invalid proxy service type" });
}
const url = new URL(formatApiCall(widget.type, { endpoint, ...widget }));
let headers = cache.get(headerCacheKey);
if (!headers) {
headers = {
"content-type": "application/json",
}
cache.put(headerCacheKey, headers);
}
const url = new URL(formatApiCall(widgets[widget.type].api, { endpoint, ...widget }));
const csrfHeaderName = "x-transmission-session-id";
const method = "POST";
@ -27,10 +45,6 @@ export default async function transmissionProxyHandler(req, res) {
},
});
const headers = {
"content-type": "application/json",
};
let [status, contentType, data, responseHeaders] = await httpProxy(url, {
method,
auth,
@ -39,8 +53,9 @@ export default async function transmissionProxyHandler(req, res) {
});
if (status === 409) {
// Transmission is rejecting the request, but returning a CSRF token
logger.debug("Transmission is rejecting the request, but returning a CSRF token");
headers[csrfHeaderName] = responseHeaders[csrfHeaderName];
cache.put(headerCacheKey, headers);
// retry the request, now with the CSRF token
[status, contentType, data, responseHeaders] = await httpProxy(url, {
@ -51,6 +66,10 @@ export default async function transmissionProxyHandler(req, res) {
});
}
if (status !== 200) {
logger.error("Error getting data from Transmission: %d. Data: %s", status, data);
}
if (contentType) res.setHeader("Content-Type", contentType);
return res.status(status).send(data);
}