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https://github.com/NousResearch/hermes-agent.git
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42bc07d107
The hidden BrowserWindow used by fetchLinkTitle to scrape page titles had no will-download handler on its session. When a link artifact URL responds with Content-Disposition: attachment, Electron fires will-download and the file is saved for real — explaining the spurious download on the Artifacts page. Add guardLinkTitleSession() (parallel to the existing audio-mute guard for #49505) that installs a will-download handler which immediately cancels every download item on the hermes:link-titles session. Call it from getLinkTitleSession() right after the request-type blocklist is wired up.
52 lines
1.8 KiB
JavaScript
52 lines
1.8 KiB
JavaScript
'use strict'
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// Hidden BrowserWindow used by tier-2 link-title resolution: when curl can't
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// read a page <title> (bot walls, JS-rendered pages), we briefly load the URL
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// in an offscreen window and read its title. That window loads arbitrary
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// user-linked pages, so it must never emit sound or trigger real downloads.
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function linkTitleWindowOptions(partitionSession) {
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return {
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show: false,
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width: 1280,
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height: 800,
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webPreferences: {
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backgroundThrottling: false,
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contextIsolation: true,
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javascript: true,
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nodeIntegration: false,
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sandbox: true,
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session: partitionSession,
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webSecurity: true
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}
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}
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}
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// Create the offscreen title-fetch window and immediately mute it. Without the
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// mute, autoplaying media on the loaded page (e.g. a YouTube link) leaks ~2s of
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// audio every time a session containing such links is re-rendered. See #49505.
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function createLinkTitleWindow(BrowserWindow, partitionSession) {
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const window = new BrowserWindow(linkTitleWindowOptions(partitionSession))
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try {
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window.webContents.setAudioMuted(true)
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} catch {
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// webContents may be unavailable in degraded/headless environments; muting
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// is best-effort and the window is destroyed within a few seconds anyway.
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}
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return window
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}
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// Cancel any download the title-fetch window triggers. Without this, a link
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// artifact URL served with Content-Disposition: attachment auto-downloads every
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// time the Artifacts page renders and fetchLinkTitle loads it.
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function guardLinkTitleSession(partitionSession) {
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try {
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partitionSession.on('will-download', (_event, item) => item.cancel())
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} catch {
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// best-effort; worst case is a spurious download
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}
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}
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module.exports = { createLinkTitleWindow, guardLinkTitleSession, linkTitleWindowOptions }
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