cdn 代理供应商
目前就是想用 jsdelivr 代理 github 图床，但是超限了。
text
cdn.jsdelivr.net Package size exceeded the configured limit of 50 MB.- https://cdn.jsdelivr.net/gh/ruan-cat/img-store/img/2024-06-27-14-34-20.png
- https://cdn.jsdelivr.net/gh/ruan-cat/img-store@main/img/2024-06-27-14-34-20.png
50M 额度超限
针对仓库：
本仓库被当做是我的图床，为了高效率访问里面的文件，我用的是 cdn.jsdelivr.net 代理的方案。该方案现在遇到了 50M 超限的情况。 比如该图片：
目前查到一个方案是增加 branch 分支名，继续蹭 50M 的额度。
增加显性的分支名后，确实可以访问：
但是该方案确实给我带来焦虑，就是我不确定到底有多少图片的 url 需要增加分支名，维护起来不优雅，一旦再次超限，受影响的图片就很多。一大堆的文件都会受影响。
尝试寻找新的代理方案
该方案有效。
配置自己的 worker 代理脚本
上述的教程讲的是用 cloudflare 代理特定目标的地址。代理了 github。
我的核心需求是这样的：
必定可用的地址如下：
期望未来能用的地址如下：
地址 gh-img-store.ruan-cat.com 去代理 raw.githubusercontent.com/ruan-cat/img-store/main 地址。
根据此需求，改写教程提供的 worker 代码，最终生效的 worker 如下：
worker 代码
js
// 你要镜像的网站.
const upstream = "raw.githubusercontent.com";
// 镜像网站的目录，比如你想镜像某个网站的二级目录则填写二级目录的目录名，镜像 google 用不到，默认即可.
const upstream_path = "/ruan-cat/img-store/main/";
// 镜像站是否有手机访问专用网址，没有则填一样的.
const upstream_mobile = "raw.githubusercontent.com";
// 屏蔽国家和地区.
const blocked_region = ["KP", "SY", "PK", "CU"];
// 屏蔽 IP 地址.
const blocked_ip_address = ["0.0.0.0", "127.0.0.1"];
// 镜像站是否开启 HTTPS.
const https = true;
// 文本替换.
const replace_dict = { $upstream: "$custom_domain", "//raw.githubusercontent.com": "" };
// 以下保持默认，不要动
addEventListener("fetch", (event) => {
event.respondWith(fetchAndApply(event.request));
});
async function fetchAndApply(request) {
const region = request.headers.get("cf-ipcountry").toUpperCase();
const ip_address = request.headers.get("cf-connecting-ip");
const user_agent = request.headers.get("user-agent");
let response = null;
let url = new URL(request.url);
let url_hostname = url.hostname;
if (https == true) {
url.protocol = "https:";
} else {
url.protocol = "http:";
}
if (await device_status(user_agent)) {
var upstream_domain = upstream;
} else {
var upstream_domain = upstream_mobile;
}
url.host = upstream_domain;
if (url.pathname == "/") {
url.pathname = upstream_path;
} else {
url.pathname = upstream_path + url.pathname;
}
if (blocked_region.includes(region)) {
response = new Response("Access denied: WorkersProxy is not available in your region yet.", {
status: 403,
});
} else if (blocked_ip_address.includes(ip_address)) {
response = new Response("Access denied: Your IP address is blocked by WorkersProxy.", {
status: 403,
});
} else {
let method = request.method;
let request_headers = request.headers;
let new_request_headers = new Headers(request_headers);
new_request_headers.set("Host", url.hostname);
new_request_headers.set("Referer", url.hostname);
let original_response = await fetch(url.href, {
method: method,
headers: new_request_headers,
});
let original_response_clone = original_response.clone();
let original_text = null;
let response_headers = original_response.headers;
let new_response_headers = new Headers(response_headers);
let status = original_response.status;
new_response_headers.set("access-control-allow-origin", "*");
new_response_headers.set("access-control-allow-credentials", true);
new_response_headers.delete("content-security-policy");
new_response_headers.delete("content-security-policy-report-only");
new_response_headers.delete("clear-site-data");
const content_type = new_response_headers.get("content-type");
if (content_type.includes("text/html") && content_type.includes("UTF-8")) {
original_text = await replace_response_text(original_response_clone, upstream_domain, url_hostname);
} else {
original_text = original_response_clone.body;
}
response = new Response(original_text, {
status,
headers: new_response_headers,
});
}
return response;
}
async function replace_response_text(response, upstream_domain, host_name) {
let text = await response.text();
var i, j;
for (i in replace_dict) {
j = replace_dict[i];
if (i == "$upstream") {
i = upstream_domain;
} else if (i == "$custom_domain") {
i = host_name;
}
if (j == "$upstream") {
j = upstream_domain;
} else if (j == "$custom_domain") {
j = host_name;
}
let re = new RegExp(i, "g");
text = text.replace(re, j);
}
return text;
}
async function device_status(user_agent_info) {
var agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
var flag = true;
for (var v = 0; v < agents.length; v++) {
if (user_agent_info.indexOf(agents[v]) > 0) {
flag = false;
break;
}
}
return flag;
}贡献者
ruan-cat