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"use strict";
/**
* static files (404.html, sw.js, conf.js)
*/
//////////////////////////////////////////
// 以下是better-github-api的核心设置 //
//////////////////////////////////////////
//主页 请求无参数时跳转主页 要求有https://
const HOME_PAGE = "https://upup.cool";
//////////////////////////////////////////
// 以下是better-github-api的核心代码 //
//////////////////////////////////////////
// 获取handleRequest对请求处理的结果
addEventListener("fetch", (event) => {
event.respondWith(
handleRequest(event.request).catch(
(err) => new Response(err.stack, { status: 500 })
)
);
});
/**
* @param {Request} req
* @param {string} path
* @note 方法名修改为cdnHandler，参数增加req以返回请求，开头的几行删除
*/
async function cdnHandler(req, path) {
path = path.replace("github.com", "github.com.cnpmjs.org");
return Response.redirect(path, 302);
}
function getJsonLength(jsonData){
var jsonLength = 0;
for(var item in jsonData){
jsonLength++;
}
return jsonLength;
}
/**
* 列出当前的键值对信息
* @param {Request} request
* @param pathname
* @returns {Promise<Response>}
*/
async function list(request, pathname) {
return new Response("format is corrected, but this api is not implemented currently.", {status: 200})
}
/**
* 获取Github Release API的结果
* @param {string} owner
* @param {string} repo
* @param {string} version
* @returns {Promise<any>}
*/
async function getReleaseInfo(owner, repo, version) {
//Github API请求URL
let req = "https://api.github.com/repos/" + owner + "/" + repo + "/releases";
//根据请求的版本完善URL
if (version === "latest") {
req += "/latest";
} else {
req += "/tags/" + version;
}
//获得release信息
return await fetch(req, {
headers: {
accept: "application/json",
"Content-Type": "application/json",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.92 Safari/537.36",
},
}).then(response => response.json()) // 解析结果为JSON;
}
/**
* 获取GitHub Release的（最新）版本号
* @param {string} owner
* @param {string} repo
* @param {string} version
* @returns {string}
*/
async function getVersion(owner, repo, version) {
//先获取Release信息
const resp = await getReleaseInfo(owner, repo, version);
//tag_name即版本号
return resp.tag_name;
}
/**
* 获取某个版本的源代码
* @param request
* @param {string} owner
* @param {string} repo
* @param {string} version
* @returns {Response}
*/
async function getSource(request, owner, repo, version) {
//获取版本号
const ver = await getVersion(owner, repo, version)
// console.log(ver)
return cdnHandler(request, "https://github.com/" + owner + "/" + repo + "/archive/refs/tags/" + ver + ".zip")
}
/**
* 获取附件
* @param request
* @param {string} owner
* @param {string} repo
* @param {string} version
* @param {string} filter
* @returns {Response} TODO 统一返回格式
*/
async function getAssets(request, owner, repo, version, filter) {
//获取release信息
const resp = await getReleaseInfo(owner, repo, version);
console.log(resp)
//附件为空
if (getJsonLength(resp.assets) === 0) {
return new Response("failed to find assets.", {status: 400})
}
//未设置filter过滤器，附件只有一个则返回结果
if (!filter) {
if (getJsonLength(resp.assets) === 1) {
return cdnHandler(request, resp.assets[0].browser_download_url);
} else {
return new Response("failed to handle more than 1 asset without filter.", {status: 400})
}
}
//有filter时，提取 include exclude start end 4个过滤器
const flt = filter.split("&")
//使用filter遍历所有附件
let target, count = 0;
for (const asset of resp.assets) {
const name = asset.name
if ( (flt[1] === '' || flt[1] === undefined || name.search(flt[1]) !== -1 ) &&
(flt[2] === '' || flt[2] === undefined || name.search(flt[2]) === -1 ) &&
(flt[3] === '' || flt[3] === undefined || name.startsWith(flt[3]) ) &&
(flt[4] === '' || flt[4] === undefined || name.endsWith(flt[4]) ) ) {
target = asset.browser_download_url;
count++;
}
//超过一个匹配结果返回错误
if ( count > 1 ) {
return new Response("failed to handle multiple assets matched with filter: " + flt, {status: 400})
}
}
//无匹配结果返回错误
if (count <= 0) {
return new Response("failed to find any matched assets with filter.", {status: 400})
}
//返回正确结果
return cdnHandler(request, target);
}
/**
* TODO 获取仓库的信息：版本号、更新内容、精简的附件信息和源代码下载地址
* @param request
* @param {string} owner
* @param {string} repo
* @param {string} version
* @returns {Response}
*/
async function getInfo(request, owner, repo, version) {
//获取Release信息
const resp = await getReleaseInfo(owner, repo, version);
//判空
if (resp.tag_name === '' || resp.tag_name === undefined) {
return new Response("failed to get info, please check your url.", {status: 400})
}
//附件字段精简
let assets = []
for (const asset of resp.assets) {
assets.push({
name: asset.name,
size: asset.size,
browser_download_url: asset.browser_download_url,
})
}
//信息聚合
let info = {
version : resp.tag_name,
source : "https://github.com/" + owner + "/" + repo + "/archive/refs/tags/" + resp.tag_name + ".zip",
assets : assets,
log : resp.body
}
//返回Json格式的字符串
return new Response(JSON.stringify(info))
}
/**
* 访问GitHub仓库信息
* @param {Request} request
* @param pathname
* @returns {Promise<Response>}
*/
async function repo(request, pathname) {
//路径分隔 1=RepoOwner 2=RepoName 3...
const strs = pathname.split("/");
console.log(strs)
//判空+赋值
if (strs[1] === '' || strs[1] === undefined || strs[2] === '' || strs[2] === undefined) {
return new Response('invalid input of Repo Owner or Repo Name.', {status: 400});
}
const owner = strs[1], repo = strs[2];
//获取最新版的唯一附件
if( (strs[3] === '' || strs[3] === undefined || strs[3] === 'latest') && (strs[4] === '' || strs[4] === undefined) ){
return getAssets(request, owner, repo, "latest", "")
}
//获取过滤后的唯一附件
if ( strs[3].startsWith("&") && (strs[4] === '' || strs[4] === undefined) ) {
return getAssets(request, owner, repo, "latest", strs[3]);
}
//同上
if ( (strs[3] === 'latest' && strs[4].startsWith("&")) ) {
return getAssets(request, owner, repo, "latest", strs[4]);
}
//获取最新版本的版本号
if ( (strs[3] === 'latest' && strs[4] === 'version') || (strs[3] === 'version') ) {
const version = await getVersion(owner, repo, "latest")
return new Response(version)
}
//获取最新版本的源码
if ( (strs[3] === 'latest' && strs[4] === 'source') || (strs[3] === 'source') ) {
return getSource(request, owner, repo, "latest")
}
//获取最新版本的信息
if ( (strs[3] === 'latest' && strs[4] === 'info') || (strs[3] === 'info') ) {
console.log('进入getInfo')
return getInfo(request, owner, repo, "latest")
}
//指定标签的5种情况
const tag_name = strs[3]
//获取指定标签的唯一附件
if (strs[4] === '' || strs[4] === undefined) {
return getAssets(request, owner, repo, tag_name, "");
}
//同上且加入filter
if (strs[4].startsWith("&")) {
return getAssets(request, owner, repo, tag_name, strs[4]);
}
//获取指定标签的源代码
if (strs[4] === 'source') {
return getSource(request, owner, repo, tag_name)
}
//获取指定标签的信息
if (strs[4] === 'info') {
return getInfo(request, owner, repo, tag_name)
}
//获取指定标签的版本 P.S. 这个请求无意义，返回错误
if (strs[4] === 'version') {
return new Response("meaningless request for a version's version.", {status: 400});
}
//没有匹配的情况，返回错误
return new Response("invalid input.", {status: 400});
}
/**
* 使用KV键值对的简写访问仓库信息
* @param {Request} request
* @param pathname
* @returns {Promise<Response>}
*/
async function get(request, pathname) {
//路径分隔 1=键 2...
const strs = pathname.split("/")
let key = strs[1];
//处理空值
if (key === '' || key === undefined) {
return new Response("no key is found, check input.", {status: 400});
}
//转换成小写
key = key.toLowerCase()
//从KV命名空间获取数据
const resp = await KV.get(key);
if (resp == null) {
return new Response('failed to find key:' + key, {status: 400});
}
const value = JSON.parse(resp);
if (!value.hasOwnProperty("repo")) {
return new Response('failed to get repo info from key-value pair\'s value' + key, {status: 400});
}
const info = value.info;
const repo_info = value.repo;
// const zh = info.zh_CN;
//检查请求中有没有filter，有就替换KV里的
let filter;
if ( strs[strs.length-1].startsWith("&") ) {
filter = strs[strs.length-1];
} else {
filter = value.filter;
}
//提取get/键/...后面的参数
let param = strs.slice(2, strs.length).join("/")
if (param) param = "/" + param
//生成符合repo方法格式的请求参数
const req = "/" + repo_info + param + "/" + filter;
console.log(req)
return repo(request, req);
}
/**
* 获取已缓存的最新版本信息
* @param {Request} request
* @param pathname
* @returns {Promise<Response>}
*/
async function bucket(request, pathname) {
return fetch("");
}
/**
* 提交get的快速键值对，需要Auth认证
* @param {Request} request
* @param pathname
* @returns {Promise<Response>}
*/
async function submit(request, pathname) {
return fetch("");
}
/**
* 请求处理的主体
* @param {Request} request
* @returns {Promise<Response>}
*/
async function handleRequest(request) {
const { pathname } = new URL(request.url);
//空请求返回主页
if (pathname === '' || pathname === '/') {
return Response.redirect(HOME_PAGE, 302);
}
//列出当前的键值对信息
if (pathname.startsWith("/list")) {
return list(request, pathname)
}
//访问GitHub仓库信息
if (pathname.startsWith("/repo")) {
return repo(request, pathname.replace("/repo", ""))
}
//使用KV键值对的简写访问仓库信息
if (pathname.startsWith("/get")) {
return get(request, pathname.replace("/get", ""))
}
//获取已缓存的最新版本信息
if (pathname.startsWith("/bucket")) {
return bucket(request, pathname.replace("/bucket", ""))
}
//提交get的快速键值对，需要Auth认证
if (pathname.startsWith("/submit")) {
return submit(request, pathname.replace("/submit", ""))
}
return new Response("invalid request format.", {status: 404});
}
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