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JavaScript

/**
* Background script - handles cookie operations and API calls
*/
// Store for captured Discord token
let discordToken = null;
let discordTokenCapturedAt = null;
// Store for Pixiv OAuth
let pixivRefreshToken = null;
let pixivTokenCapturedAt = null;
let pixivOAuthPending = null; // { codeVerifier, tabId, resolve, reject }
// Pixiv OAuth constants (these are public - used by all Pixiv mobile apps)
const PIXIV_CLIENT_ID = 'MOBrBDS8blbauoSck0ZfDbtuzpyT';
const PIXIV_CLIENT_SECRET = 'lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj';
const PIXIV_OAUTH_URL = 'https://app-api.pixiv.net/web/v1/login';
const PIXIV_TOKEN_URL = 'https://oauth.secure.pixiv.net/auth/token';
const PIXIV_REDIRECT_URI = 'https://app-api.pixiv.net/web/v1/users/auth/pixiv/callback';
// Track initialization state
let initialized = false;
/**
* Ensure extension is initialized
*/
async function ensureInitialized() {
if (!initialized) {
console.log('Initializing extension...');
try {
await api.init();
await loadDiscordToken();
await loadPixivToken();
initialized = true;
console.log('Extension initialized successfully');
} catch (error) {
console.error('Failed to initialize extension:', error);
throw error;
}
}
}
// Initialize API on startup
browser.runtime.onInstalled.addListener(async () => {
console.log('GallerySubscriber extension installed');
await ensureInitialized();
});
browser.runtime.onStartup.addListener(async () => {
console.log('GallerySubscriber extension startup');
await ensureInitialized();
});
// Also initialize immediately in case background wakes up from idle
ensureInitialized().catch(err => console.error('Initial init failed:', err));
/**
* Load Discord token from storage
*/
async function loadDiscordToken() {
const stored = await browser.storage.local.get(['discordToken', 'discordTokenCapturedAt']);
if (stored.discordToken) {
discordToken = stored.discordToken;
discordTokenCapturedAt = stored.discordTokenCapturedAt;
console.log('Loaded Discord token from storage (captured:', discordTokenCapturedAt, ')');
}
}
/**
* Save Discord token to storage
*/
async function saveDiscordToken(token) {
discordToken = token;
discordTokenCapturedAt = new Date().toISOString();
await browser.storage.local.set({
discordToken: token,
discordTokenCapturedAt: discordTokenCapturedAt
});
console.log('Discord token captured and saved');
}
/**
* Load Pixiv token from storage
*/
async function loadPixivToken() {
const stored = await browser.storage.local.get(['pixivRefreshToken', 'pixivTokenCapturedAt']);
if (stored.pixivRefreshToken) {
pixivRefreshToken = stored.pixivRefreshToken;
pixivTokenCapturedAt = stored.pixivTokenCapturedAt;
console.log('Loaded Pixiv refresh token from storage (captured:', pixivTokenCapturedAt, ')');
}
}
/**
* Save Pixiv refresh token to storage
*/
async function savePixivToken(token) {
pixivRefreshToken = token;
pixivTokenCapturedAt = new Date().toISOString();
await browser.storage.local.set({
pixivRefreshToken: token,
pixivTokenCapturedAt: pixivTokenCapturedAt
});
console.log('Pixiv refresh token captured and saved');
}
/**
* Generate a random code verifier for PKCE (43-128 chars, URL-safe)
*/
function generateCodeVerifier() {
const array = new Uint8Array(32);
crypto.getRandomValues(array);
return base64UrlEncode(array);
}
/**
* Generate code challenge from verifier (SHA-256 hash, base64url encoded)
*/
async function generateCodeChallenge(verifier) {
const encoder = new TextEncoder();
const data = encoder.encode(verifier);
const hash = await crypto.subtle.digest('SHA-256', data);
return base64UrlEncode(new Uint8Array(hash));
}
/**
* Base64 URL encode (no padding, URL-safe characters)
*/
function base64UrlEncode(buffer) {
const base64 = btoa(String.fromCharCode(...buffer));
return base64
.replace(/\+/g, '-')
.replace(/\//g, '_')
.replace(/=/g, '');
}
/**
* Initiate Pixiv OAuth flow
* Opens a new tab for the user to log in, then captures the authorization code
*/
async function initiatePixivOAuth() {
// Generate PKCE values
const codeVerifier = generateCodeVerifier();
const codeChallenge = await generateCodeChallenge(codeVerifier);
// Build OAuth URL
const params = new URLSearchParams({
code_challenge: codeChallenge,
code_challenge_method: 'S256',
client: 'pixiv-android'
});
const authUrl = `${PIXIV_OAUTH_URL}?${params.toString()}`;
console.log('Initiating Pixiv OAuth flow...');
// Create a promise that will be resolved when we get the callback
return new Promise((resolve, reject) => {
// Store the pending OAuth state
pixivOAuthPending = {
codeVerifier,
resolve,
reject,
timeoutId: setTimeout(() => {
pixivOAuthPending = null;
reject(new Error('Pixiv OAuth timed out. Please try again.'));
}, 5 * 60 * 1000) // 5 minute timeout
};
// Open the auth URL in a new tab
browser.tabs.create({ url: authUrl }).then(tab => {
pixivOAuthPending.tabId = tab.id;
console.log('Opened Pixiv OAuth tab:', tab.id);
}).catch(err => {
clearTimeout(pixivOAuthPending.timeoutId);
pixivOAuthPending = null;
reject(err);
});
});
}
/**
* Exchange authorization code for tokens
*/
async function exchangePixivCode(code, codeVerifier) {
console.log('Exchanging Pixiv authorization code for tokens...');
const params = new URLSearchParams({
client_id: PIXIV_CLIENT_ID,
client_secret: PIXIV_CLIENT_SECRET,
code: code,
code_verifier: codeVerifier,
grant_type: 'authorization_code',
include_policy: 'true',
redirect_uri: PIXIV_REDIRECT_URI
});
const response = await fetch(PIXIV_TOKEN_URL, {
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'PixivAndroidApp/5.0.234 (Android 11; Pixel 5)'
},
body: params.toString()
});
if (!response.ok) {
const errorText = await response.text();
console.error('Pixiv token exchange failed:', response.status, errorText);
throw new Error(`Token exchange failed: ${response.status}`);
}
const data = await response.json();
console.log('Pixiv token exchange successful');
if (!data.refresh_token) {
throw new Error('No refresh token in response');
}
return data.refresh_token;
}
/**
* Listen for Pixiv OAuth callback
* Intercepts the redirect to pixiv:// scheme and extracts the authorization code
*/
browser.webRequest.onBeforeRequest.addListener(
(details) => {
// Check if this is the OAuth callback
if (!pixivOAuthPending) return;
const url = new URL(details.url);
// Check for the callback URL pattern
if (url.pathname.includes('/callback') && url.searchParams.has('code')) {
const code = url.searchParams.get('code');
console.log('Captured Pixiv OAuth callback with code');
// Get the pending OAuth state
const { codeVerifier, resolve, reject, timeoutId, tabId } = pixivOAuthPending;
pixivOAuthPending = null;
clearTimeout(timeoutId);
// Close the OAuth tab
if (tabId) {
browser.tabs.remove(tabId).catch(() => {});
}
// Exchange the code for tokens
exchangePixivCode(code, codeVerifier)
.then(refreshToken => {
savePixivToken(refreshToken);
resolve(refreshToken);
})
.catch(err => {
reject(err);
});
// Cancel the request (don't actually navigate to the callback URL)
return { cancel: true };
}
},
{ urls: ['*://app-api.pixiv.net/web/v1/users/auth/pixiv/callback*'] },
['blocking']
);
/**
* Listen for Discord API requests to capture Authorization header
*/
browser.webRequest.onSendHeaders.addListener(
(details) => {
// Look for Authorization header
const authHeader = details.requestHeaders.find(
h => h.name.toLowerCase() === 'authorization'
);
if (authHeader && authHeader.value) {
// Discord user tokens don't have "Bearer " prefix
// Bot tokens have "Bot " prefix - we want user tokens
const token = authHeader.value;
// Only capture if it looks like a user token (not a bot token)
if (!token.startsWith('Bot ') && token.length > 50) {
// Only save if it's different from what we have
if (token !== discordToken) {
saveDiscordToken(token);
}
}
}
},
{ urls: ['*://discord.com/api/*', '*://*.discord.com/api/*'] },
['requestHeaders']
);
// Handle messages from popup and options pages
browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
handleMessage(message)
.then(sendResponse)
.catch(error => {
console.error('Message handler error:', error);
sendResponse({ error: error.message });
});
return true; // Keep channel open for async response
});
/**
* Route messages to appropriate handlers
* @param {object} message - Message object with type property
* @returns {Promise<object>} - Response data
*/
async function handleMessage(message) {
console.log('Handling message:', message.type);
// Ensure initialized for operations that need it
if (['EXPORT_COOKIES', 'EXPORT_ALL_COOKIES', 'GET_PLATFORM_STATUS', 'TEST_CONNECTION'].includes(message.type)) {
await ensureInitialized();
}
switch (message.type) {
case 'EXPORT_COOKIES':
return await exportCookies(message.platform);
case 'EXPORT_ALL_COOKIES':
return await exportAllCookies();
case 'GET_PLATFORM_STATUS':
return await getPlatformStatus();
case 'TEST_CONNECTION':
return await testConnection();
case 'GET_CONFIG':
return await getConfig();
case 'SAVE_CONFIG':
return await saveConfig(message.config);
default:
throw new Error(`Unknown message type: ${message.type}`);
}
}
/**
* Export cookies for a single platform to the backend
* @param {string} platformKey - Platform identifier
* @returns {Promise<object>} - Result object
*/
async function exportCookies(platformKey) {
await api.init();
const platform = PLATFORMS[platformKey];
if (!platform) {
throw new Error(`Unknown platform: ${platformKey}`);
}
let credentialData;
let credentialType;
if (platform.authType === 'token') {
// Discord - use captured token from webRequest listener
if (platformKey === 'discord') {
if (!discordToken) {
throw new Error(`No Discord token captured. Please open Discord in this browser and interact with it (e.g., switch channels) to capture the token.`);
}
credentialData = discordToken;
credentialType = 'token';
// Send to backend
const result = await api.uploadCredentials(platformKey, credentialType, credentialData);
return {
success: true,
platform: platformKey,
tokenCapturedAt: discordTokenCapturedAt,
message: result.message || 'Token exported successfully'
};
}
// Pixiv - use OAuth flow to get refresh token
if (platformKey === 'pixiv') {
// If we already have a token, use it; otherwise initiate OAuth
if (!pixivRefreshToken) {
try {
await initiatePixivOAuth();
} catch (err) {
throw new Error(`Pixiv OAuth failed: ${err.message}`);
}
}
if (!pixivRefreshToken) {
throw new Error('Failed to obtain Pixiv refresh token');
}
credentialData = pixivRefreshToken;
credentialType = 'token';
// Send to backend
const result = await api.uploadCredentials(platformKey, credentialType, credentialData);
return {
success: true,
platform: platformKey,
tokenCapturedAt: pixivTokenCapturedAt,
message: result.message || 'Refresh token exported successfully'
};
}
// Other token-based platforms require manual entry
throw new Error(`${platform.name} requires manual token entry in the web UI.`);
}
// Cookie-based auth
const cookies = await extractCookiesForPlatform(platformKey);
if (cookies.length === 0) {
throw new Error(`No cookies found for ${platform.name}. Please ensure you are logged in.`);
}
credentialData = toNetscapeFormat(cookies);
credentialType = 'cookies';
// Send to backend
const result = await api.uploadCredentials(platformKey, credentialType, credentialData);
return {
success: true,
platform: platformKey,
cookieCount: cookies.length,
message: result.message || 'Credentials exported successfully'
};
}
/**
* Export cookies for all cookie-based platforms
* @returns {Promise<object>} - Results for each platform
*/
async function exportAllCookies() {
await api.init();
const results = {};
const platforms = Object.keys(PLATFORMS);
for (const platformKey of platforms) {
const platform = PLATFORMS[platformKey];
// Skip token-based platforms (except Discord and Pixiv if we have tokens)
if (platform.authType === 'token' && !['discord', 'pixiv'].includes(platformKey)) {
results[platformKey] = {
success: false,
platform: platformKey,
skipped: true,
message: 'Token-based auth requires manual entry'
};
continue;
}
// Skip Discord if no token captured
if (platformKey === 'discord' && !discordToken) {
results[platformKey] = {
success: false,
platform: platformKey,
skipped: true,
message: 'No token captured - open Discord in browser first'
};
continue;
}
// Skip Pixiv if no token captured (don't auto-trigger OAuth in bulk export)
if (platformKey === 'pixiv' && !pixivRefreshToken) {
results[platformKey] = {
success: false,
platform: platformKey,
skipped: true,
message: 'No token - click Pixiv card to authenticate'
};
continue;
}
try {
results[platformKey] = await exportCookies(platformKey);
} catch (error) {
results[platformKey] = {
success: false,
platform: platformKey,
error: error.message
};
}
}
return results;
}
/**
* Get status information for all platforms
* @returns {Promise<object>} - Status for each platform
*/
async function getPlatformStatus() {
const status = {};
for (const [key, platform] of Object.entries(PLATFORMS)) {
try {
if (platform.authType === 'token') {
// Token-based platforms
if (key === 'discord') {
status[key] = {
name: platform.name,
authType: 'token',
hasToken: !!discordToken,
tokenCapturedAt: discordTokenCapturedAt,
hasCookies: false,
cookieCount: 0,
note: discordToken
? `Token captured ${new Date(discordTokenCapturedAt).toLocaleString()}`
: 'Open Discord in browser to capture token'
};
} else if (key === 'pixiv') {
status[key] = {
name: platform.name,
authType: 'token',
hasToken: !!pixivRefreshToken,
tokenCapturedAt: pixivTokenCapturedAt,
hasCookies: false,
cookieCount: 0,
note: pixivRefreshToken
? `Token captured ${new Date(pixivTokenCapturedAt).toLocaleString()}`
: 'Click to authenticate with Pixiv'
};
} else {
status[key] = {
name: platform.name,
authType: 'token',
hasCookies: false,
cookieCount: 0,
note: platform.note || 'Requires manual token entry'
};
}
} else {
// Cookie-based platforms
const cookies = await extractCookiesForPlatform(key);
status[key] = {
name: platform.name,
authType: 'cookies',
hasCookies: cookies.length > 0,
cookieCount: cookies.length
};
}
} catch (error) {
status[key] = {
name: platform.name,
authType: platform.authType,
hasCookies: false,
cookieCount: 0,
error: error.message
};
}
}
return status;
}
/**
* Test connection to the backend
* @returns {Promise<object>} - Connection status
*/
async function testConnection() {
await api.init();
if (!api.isConfigured()) {
return { connected: false, error: 'Not configured' };
}
try {
await api.testConnection();
return { connected: true };
} catch (error) {
return { connected: false, error: error.message };
}
}
/**
* Get current configuration
* @returns {Promise<object>} - Config object
*/
async function getConfig() {
const config = await browser.storage.local.get(['apiUrl', 'apiKey']);
return config;
}
/**
* Save configuration
* @param {object} config - Config object with apiUrl and apiKey
* @returns {Promise<object>} - Success status
*/
async function saveConfig(config) {
await browser.storage.local.set(config);
await api.init();
return { success: true };
}