152 lines
4.6 KiB
JavaScript
152 lines
4.6 KiB
JavaScript
// Website you intended to retrieve for users.
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const upstream = 'www.google.com'
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// Custom pathname for the upstream website.
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const upstream_path = '/'
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// Website you intended to retrieve for users using mobile devices.
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const upstream_mobile = 'www.google.com'
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// Countries and regions where you wish to suspend your service.
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const blocked_region = ['KP', 'SY', 'PK', 'CU']
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// IP addresses which you wish to block from using your service.
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const blocked_ip_address = ['0.0.0.0', '127.0.0.1']
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// Whether to use HTTPS protocol for upstream address.
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const https = true
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// Whether to disable cache.
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const disable_cache = true
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// Replace texts.
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const replace_dict = {
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'$upstream': '$custom_domain',
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'//google.com': ''
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}
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addEventListener('fetch', event => {
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event.respondWith(fetchAndApply(event.request));
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})
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async function fetchAndApply(request) {
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const region = request.headers.get('cf-ipcountry').toUpperCase();
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const ip_address = request.headers.get('cf-connecting-ip');
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const user_agent = request.headers.get('user-agent');
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let response = null;
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let url = new URL(request.url);
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let url_hostname = url.hostname;
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if (https == true) {
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url.protocol = 'https:';
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} else {
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url.protocol = 'http:';
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}
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if (await device_status(user_agent)) {
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var upstream_domain = upstream;
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} else {
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var upstream_domain = upstream_mobile;
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}
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url.host = upstream_domain;
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if (url.pathname == '/') {
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url.pathname = upstream_path;
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} else {
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url.pathname = upstream_path + url.pathname;
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}
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if (blocked_region.includes(region)) {
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response = new Response('Access denied: WorkersProxy is not available in your region yet.', {
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status: 403
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});
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} else if (blocked_ip_address.includes(ip_address)) {
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response = new Response('Access denied: Your IP address is blocked by WorkersProxy.', {
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status: 403
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});
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} else {
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let method = request.method;
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let request_headers = request.headers;
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let new_request_headers = new Headers(request_headers);
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new_request_headers.set('Host', upstream_domain);
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new_request_headers.set('Referer', url.protocol + '//' + url_hostname);
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let original_response = await fetch(url.href, {
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method: method,
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headers: new_request_headers
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})
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let original_response_clone = original_response.clone();
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let original_text = null;
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let response_headers = original_response.headers;
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let new_response_headers = new Headers(response_headers);
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let status = original_response.status;
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if (disable_cache) {
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new_response_headers.set('Cache-Control', 'no-store');
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}
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new_response_headers.set('access-control-allow-origin', '*');
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new_response_headers.set('access-control-allow-credentials', true);
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new_response_headers.delete('content-security-policy');
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new_response_headers.delete('content-security-policy-report-only');
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new_response_headers.delete('clear-site-data');
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if(new_response_headers.get("x-pjax-url")) {
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new_response_headers.set("x-pjax-url", response_headers.get("x-pjax-url").replace("//" + upstream_domain, "//" + url_hostname));
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}
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const content_type = new_response_headers.get('content-type');
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if (content_type != null && content_type.includes('text/html') && content_type.includes('UTF-8')) {
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original_text = await replace_response_text(original_response_clone, upstream_domain, url_hostname);
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} else {
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original_text = original_response_clone.body
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}
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response = new Response(original_text, {
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status,
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headers: new_response_headers
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})
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}
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return response;
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}
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async function replace_response_text(response, upstream_domain, host_name) {
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let text = await response.text()
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var i, j;
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for (i in replace_dict) {
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j = replace_dict[i]
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if (i == '$upstream') {
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i = upstream_domain
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} else if (i == '$custom_domain') {
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i = host_name
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}
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if (j == '$upstream') {
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j = upstream_domain
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} else if (j == '$custom_domain') {
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j = host_name
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}
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let re = new RegExp(i, 'g')
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text = text.replace(re, j);
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}
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return text;
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}
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async function device_status(user_agent_info) {
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var agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
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var flag = true;
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for (var v = 0; v < agents.length; v++) {
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if (user_agent_info.indexOf(agents[v]) > 0) {
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flag = false;
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break;
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}
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}
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return flag;
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} |