利用CloudFlare Workers反代给网站提速教程

CloudFlare是国外一家知名的cdn服务商，Workers-Proxy是基于Cloudflare Workers的轻量级Javascript 反向代理。 用户可以在Cloudflare的全球网络上部署反向代理，而无需设置虚拟专用服务器和配置Nginx或Apache。

通过配置地区和 IP 过滤器，你可以根据法律规定在部分国家和地区停用反向代理服务。借助移动端跳转工具，你可以根据用户的设备来分发不同的网站。

Workers特点：

1、建立镜像网站

2、利用Cloudflare的全球网络提高加载速度

3、提高安全性（隐藏网站的IP地址）阻止特定区域或IP地址

4、将移动用户重定向到其他网页

创建就很简单了，就不介绍了，这里分享2个版本的Workers反代代码。

第一个：

1. // 替换成你想镜像的站点
2. const upstream = ‘www.google.com’
4. // 如果那个站点有专门的移动适配站点，否则保持和上面一致
5. const upstream_mobile = ‘www.google.com’
7. // 你希望禁止哪些国家访问
8. const blocked_region = [‘RU’]
10. // 禁止自访问
11. const blocked_ip_address = [‘0.0.0.0’, ‘127.0.0.1’]
13. // 替换成你想镜像的站点
14. const replace_dict = {
15. ‘$upstream’: ‘$custom_domain’,
16. ‘//www.google.com’: ”
17. }
19. //以下内容都不用动
20. addEventListener(‘fetch’, event => {
21. event.respondWith(fetchAndApply(event.request));
22. })
24. async function fetchAndApply(request) {
26. const region = request.headers.get(‘cf-ipcountry’).toUpperCase();
27. const ip_address = request.headers.get(‘cf-connecting-ip’);
28. const user_agent = request.headers.get(‘user-agent’);
30. let response = null;
31. let url = new URL(request.url);
32. let url_host = url.host;
34. if (url.protocol == ‘http:’) {
35. url.protocol = ‘https:’
36. response = Response.redirect(url.href);
37. return response;
38. }
40. if (await device_status(user_agent)) {
41. upstream_domain = upstream
42. } else {
43. upstream_domain = upstream_mobile
44. }
46. url.host = upstream_domain;
48. if (blocked_region.includes(region)) {
49. response = new Response(‘Access denied: WorkersProxy is not available in your region yet.’, {
50. status: 403
51. });
52. } else if(blocked_ip_address.includes(ip_address)){
53. response = new Response(‘Access denied: Your IP address is blocked by WorkersProxy.’, {
54. status: 403
55. });
56. } else{
57. let method = request.method;
58. let request_headers = request.headers;
59. let new_request_headers = new Headers(request_headers);
61. new_request_headers.set(‘Host’, upstream_domain);
62. new_request_headers.set(‘Referer’, url.href);
64. let original_response = await fetch(url.href, {
65. method: method,
66. headers: new_request_headers
67. })
69. let original_response_clone = original_response.clone();
70. let original_text = null;
71. let response_headers = original_response.headers;
72. let new_response_headers = new Headers(response_headers);
73. let status = original_response.status;
75. new_response_headers.set(‘access-control-allow-origin’, ‘*’);
76. new_response_headers.set(‘access-control-allow-credentials’, true);
77. new_response_headers.delete(‘content-security-policy’);
78. new_response_headers.delete(‘content-security-policy-report-only’);
79. new_response_headers.delete(‘clear-site-data’);
81. const content_type = new_response_headers.get(‘content-type’);
82. if (content_type.includes(‘text/html’) && content_type.includes(‘UTF-8’)) {
83. original_text = await replace_response_text(original_response_clone, upstream_domain, url_host);
84. } else {
85. original_text = original_response_clone.body
86. }
88. response = new Response(original_text, {
89. status,
90. headers: new_response_headers
91. })
92. }
93. return response;
94. }
96. async function replace_response_text(response, upstream_domain, host_name) {
97. let text = await response.text()
99. var i, j;
100. for (i in replace_dict) {
101. j = replace_dict[i]
102. if (i == ‘$upstream’) {
103. i = upstream_domain
104. } else if (i == ‘$custom_domain’) {
105. i = host_name
106. }
108. if (j == ‘$upstream’) {
109. j = upstream_domain
110. } else if (j == ‘$custom_domain’) {
111. j = host_name
112. }
114. let re = new RegExp(i, ‘g’)
115. text = text.replace(re, j);
116. }
117. return text;
118. }
120. async function device_status (user_agent_info) {
121. var agents = [“Android”, “iPhone”, “SymbianOS”, “Windows Phone”, “iPad”, “iPod”];
122. var flag = true;
123. for (var v = 0; v < agents.length; v++) { if (user_agent_info.indexOf(agents[v]) > 0) {
124. flag = false;
125. break;
126. }
127. }
128. return flag;
129. }

第二个：

1. // 替换成你想镜像的站点
2. const upstream = ‘google.com’
4. // 如果那个站点有专门的移动适配站点，否则保持和上面一致
5. const upstream_mobile = ‘m.google.com’
7. // 密码访问
9. const openAuth = false
10. const username = ‘username’
11. const password = ‘password’
13. // 你希望禁止哪些国家访问
14. const blocked_region = [‘RU’]
16. // 禁止自访问
17. const blocked_ip_address = [‘0.0.0.0’, ‘127.0.0.1’]
19. // 替换成你想镜像的站点
20. const replace_dict = {
21. ‘$upstream’: ‘$custom_domain’,
22. ‘//google.com’: ”
23. }
25. function unauthorized() {
26. return new Response(‘Unauthorized’, {
27. headers: {
28. ‘WWW-Authenticate’: ‘Basic realm=”goindex”‘,
29. ‘Access-Control-Allow-Origin’: ‘*’
30. },
31. status: 401
32. });
33. }
35. function parseBasicAuth(auth) {
36. try {
37. return atob(auth.split(‘ ‘).pop()).split(‘:’);
38. } catch (e) {
39. return [];
40. }
41. }
43. function doBasicAuth(request) {
44. const auth = request.headers.get(‘Authorization’);
46. if (!auth || !/^Basic [A-Za-z0-9._~+/-]+=*$/i.test(auth)) {
47. return false;
48. }
50. const [user, pass] = parseBasicAuth(auth);
51. return user === username && pass === password;
52. }
55. async function fetchAndApply(request) {
56. if (request.method === ‘OPTIONS’) // allow preflight request
57. return new Response(”, {
58. status: 200,
59. headers: {
60. ‘Access-Control-Allow-Origin’: ‘*’,
61. ‘Access-Control-Allow-Headers’: ‘*’,
62. ‘Access-Control-Allow-Methods’: ‘GET, POST, PUT, HEAD, OPTIONS’
63. }
64. });
66. if (openAuth && !doBasicAuth(request)) {
67. return unauthorized();
68. }
69. const region = request.headers.get(‘cf-ipcountry’).toUpperCase();
70. const ip_address = request.headers.get(‘cf-connecting-ip’);
71. const user_agent = request.headers.get(‘user-agent’);
73. let response = null;
74. let url = new URL(request.url);
75. let url_host = url.host;
77. if (url.protocol == ‘http:’) {
78. url.protocol = ‘https:’
79. response = Response.redirect(url.href);
80. return response;
81. }
83. if (await device_status(user_agent)) {
84. upstream_domain = upstream
85. } else {
86. upstream_domain = upstream_mobile
87. }
89. url.host = upstream_domain;
91. if (blocked_region.includes(region)) {
92. response = new Response(‘Access denied: WorkersProxy is not available in your region yet.’, {
93. status: 403
94. });
95. } else if(blocked_ip_address.includes(ip_address)){
96. response = new Response(‘Access denied: Your IP address is blocked by WorkersProxy.’, {
97. status: 403
98. });
99. } else{
100. let method = request.method;
101. let request_headers = request.headers;
102. let new_request_headers = new Headers(request_headers);
104. new_request_headers.set(‘Host’, upstream_domain);
105. new_request_headers.set(‘Referer’, url.href);
107. let original_response = await fetch(url.href, {
108. method: method,
109. headers: new_request_headers
110. })
112. let original_response_clone = original_response.clone();
113. let original_text = null;
114. let response_headers = original_response.headers;
115. let new_response_headers = new Headers(response_headers);
116. let status = original_response.status;
118. new_response_headers.set(‘access-control-allow-origin’, ‘*’);
119. new_response_headers.set(‘access-control-allow-credentials’, true);
120. new_response_headers.delete(‘content-security-policy’);
121. new_response_headers.delete(‘content-security-policy-report-only’);
122. new_response_headers.delete(‘clear-site-data’);
124. const content_type = new_response_headers.get(‘content-type’);
125. if (content_type.includes(‘text/html’) && content_type.includes(‘UTF-8’)) {
126. original_text = await replace_response_text(original_response_clone, upstream_domain, url_host);
127. } else {
128. original_text = original_response_clone.body
129. }
131. response = new Response(original_text, {
132. status,
133. headers: new_response_headers
134. })
135. }
136. return response;
137. }
139. addEventListener(‘fetch’, event => {
140. event.respondWith(fetchAndApply(event.request).catch(err => {
141. console.error(err);
142. new Response(JSON.stringify(err.stack), {
143. status: 500,
144. headers: {
145. ‘Content-Type’: ‘application/json’
146. }
147. });
148. }));
149. })
152. async function replace_response_text(response, upstream_domain, host_name) {
153. let text = await response.text()
155. var i, j;
156. for (i in replace_dict) {
157. j = replace_dict[i]
158. if (i == ‘$upstream’) {
159. i = upstream_domain
160. } else if (i == ‘$custom_domain’) {
161. i = host_name
162. }
164. if (j == ‘$upstream’) {
165. j = upstream_domain
166. } else if (j == ‘$custom_domain’) {
167. j = host_name
168. }
170. let re = new RegExp(i, ‘g’)
171. text = text.replace(re, j);
172. }
173. return text;
174. }
176. async function device_status (user_agent_info) {
177. var agents = [“Android”, “iPhone”, “SymbianOS”, “Windows Phone”, “iPad”, “iPod”];
178. var flag = true;
179. for (var v = 0; v < agents.length; v++) { if (user_agent_info.indexOf(agents[v]) > 0) {
180. flag = false;
181. break;
182. }
183. }
184. return flag;
185. }
186.  

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