mirror of
https://github.com/MarSeventh/CloudFlare-ImgBed.git
synced 2026-04-24 22:25:07 +00:00
498 lines
19 KiB
JavaScript
498 lines
19 KiB
JavaScript
import { errorHandling, telemetryData } from "./utils/middleware";
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function UnauthorizedException(reason) {
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return new Response(reason, {
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status: 401,
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statusText: "Unauthorized",
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headers: {
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"Content-Type": "text/plain;charset=UTF-8",
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// Disables caching by default.
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"Cache-Control": "no-store",
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// Returns the "Content-Length" header for HTTP HEAD requests.
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"Content-Length": reason.length,
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},
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});
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}
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function isValidAuthCode(envAuthCode, authCode) {
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return authCode === envAuthCode;
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}
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function isAuthCodeDefined(authCode) {
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return authCode !== undefined && authCode !== null && authCode.trim() !== '';
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}
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function getCookieValue(cookies, name) {
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const match = cookies.match(new RegExp('(^| )' + name + '=([^;]+)'));
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return match ? decodeURIComponent(match[2]) : null;
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}
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function authCheck(env, url, request) {
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// 优先从请求 URL 获取 authCode
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let authCode = url.searchParams.get('authCode');
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// 如果 URL 中没有 authCode，从 Referer 中获取
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if (!authCode) {
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const referer = request.headers.get('Referer');
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if (referer) {
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try {
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const refererUrl = new URL(referer);
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authCode = new URLSearchParams(refererUrl.search).get('authCode');
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} catch (e) {
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console.error('Invalid referer URL:', e);
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}
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}
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}
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// 如果 Referer 中没有 authCode，从请求头中获取
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if (!authCode) {
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authCode = request.headers.get('authCode');
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}
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// 如果请求头中没有 authCode，从 Cookie 中获取
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if (!authCode) {
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const cookies = request.headers.get('Cookie');
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if (cookies) {
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authCode = getCookieValue(cookies, 'authCode');
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}
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}
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if (isAuthCodeDefined(env.AUTH_CODE) && !isValidAuthCode(env.AUTH_CODE, authCode)) {
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return false;
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}
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return true;
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}
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export async function onRequestPost(context) { // Contents of context object
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const { request, env, params, waitUntil, next, data } = context;
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const url = new URL(request.url);
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const clonedRequest = await request.clone();
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// 鉴权
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if (!authCheck(env, url, request)) {
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return UnauthorizedException('Unauthorized');
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}
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// 获得上传IP
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const uploadIp = request.headers.get("cf-connecting-ip") || request.headers.get("x-real-ip") || request.headers.get("x-forwarded-for") || request.headers.get("x-client-ip") || request.headers.get("x-host") || request.headers.get("x-originating-ip") || request.headers.get("x-cluster-client-ip") || request.headers.get("forwarded-for") || request.headers.get("forwarded") || request.headers.get("via") || request.headers.get("requester") || request.headers.get("true-client-ip") || request.headers.get("client-ip") || request.headers.get("x-remote-ip") || request.headers.get("x-originating-ip") || request.headers.get("fastly-client-ip") || request.headers.get("akamai-origin-hop") || request.headers.get("x-remote-ip") || request.headers.get("x-remote-addr") || request.headers.get("x-remote-host") || request.headers.get("x-client-ip") || request.headers.get("x-client-ips") || request.headers.get("x-client-ip")
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// 判断上传ip是否被封禁
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const isBlockedIp = await isBlockedUploadIp(env, uploadIp);
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if (isBlockedIp) {
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return new Response('Error: Your IP is blocked', { status: 403 });
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}
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// 获得上传渠道
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const urlParamUploadChannel = url.searchParams.get('uploadChannel');
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let uploadChannel = 'TelegramNew';
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switch (urlParamUploadChannel) {
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case 'telegram':
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uploadChannel = 'TelegramNew';
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break;
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case 'cfr2':
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uploadChannel = 'CloudflareR2';
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break;
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default:
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uploadChannel = 'TelegramNew';
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break;
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}
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// 错误处理和遥测
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await errorHandling(context);
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telemetryData(context);
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// img_url 未定义或为空的处理逻辑
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if (typeof env.img_url == "undefined" || env.img_url == null || env.img_url == "") {
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return new Response('Error: Please configure KV database', { status: 500 });
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}
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// 获取文件信息
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const time = new Date().getTime();
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const formdata = await clonedRequest.formData();
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const fileType = formdata.get('file').type;
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const fileName = formdata.get('file').name;
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const fileSize = (formdata.get('file').size / 1024 / 1024).toFixed(2); // 文件大小，单位MB
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const metadata = {
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FileName: fileName,
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FileType: fileType,
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FileSize: fileSize,
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UploadIP: uploadIp,
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ListType: "None",
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TimeStamp: time,
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}
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// 检查fileType和fileName是否存在
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if (fileType === null || fileType === undefined || fileName === null || fileName === undefined) {
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return new Response('Error: fileType or fileName is wrong, check the integrity of this file!', { status: 400 });
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}
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let fileExt = fileName.split('.').pop(); // 文件扩展名
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if (!isExtValid(fileExt)) {
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// 如果文件名中没有扩展名，尝试从文件类型中获取
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fileExt = fileType.split('/').pop();
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if (fileExt === fileType || fileExt === '' || fileExt === null || fileExt === undefined) {
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// Type中无法获取扩展名
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fileExt = 'unknown' // 默认扩展名
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}
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}
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// 构建文件ID
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const nameType = url.searchParams.get('uploadNameType') || 'default'; // 获取命名方式
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const unique_index = time + Math.floor(Math.random() * 10000);
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let fullId = '';
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if (nameType === 'index') {
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fullId = unique_index + '.' + fileExt;
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} else if (nameType === 'origin') {
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fullId = fileName? fileName : unique_index + '.' + fileExt;
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} else {
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fullId = fileName? unique_index + '_' + fileName : unique_index + '.' + fileExt;
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}
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// 获得返回链接格式, default为返回/file/id, full为返回完整链接
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const returnFormat = url.searchParams.get('returnFormat') || 'default';
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let returnLink = '';
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if (returnFormat === 'full') {
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returnLink = `${url.origin}/file/${fullId}`;
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} else {
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returnLink = `/file/${fullId}`;
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}
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// 清除CDN缓存
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const cdnUrl = `https://${url.hostname}/file/${fullId}`;
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await purgeCDNCache(env, cdnUrl, url);
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// ====================================不同渠道上传=======================================
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// 出错是否切换渠道自动重试，默认开启
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const autoRetry = url.searchParams.get('autoRetry') === 'false' ? false : true;
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let err = '';
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// 上传到不同渠道
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if (uploadChannel === 'CloudflareR2') {
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// -------------CloudFlare R2 渠道---------------
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const res = await uploadFileToCloudflareR2(env, formdata, fullId, metadata, returnLink);
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if (res.status === 200 || !autoRetry) {
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return res;
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} else {
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err = await res.text();
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}
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} else {
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// ----------------Telegram New 渠道-------------------
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const res = await uploadFileToTelegram(env, formdata, fullId, metadata, fileExt, fileName, fileType, url, clonedRequest, returnLink);
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if (res.status === 200 || !autoRetry) {
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return res;
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} else {
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err = await res.text();
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}
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}
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// 上传失败，开始自动切换渠道重试
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const res = await tryRetry(err, env, uploadChannel, formdata, fullId, metadata, fileExt, fileName, fileType, url, clonedRequest, returnLink);
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return res;
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}
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// 自动切换渠道重试
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async function tryRetry(err, env, uploadChannel, formdata, fullId, metadata, fileExt, fileName, fileType, url, clonedRequest, returnLink) {
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// 渠道列表
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const channelList = ['CloudflareR2', 'TelegramNew'];
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const errMessages = {};
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errMessages[uploadChannel] = 'Error: ' + uploadChannel + err;
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for (let i = 0; i < channelList.length; i++) {
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if (channelList[i] !== uploadChannel) {
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let res = null;
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if (channelList[i] === 'CloudflareR2') {
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res = await uploadFileToCloudflareR2(env, formdata, fullId, metadata, returnLink);
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} else if (channelList[i] === 'TelegramNew') {
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res = await uploadFileToTelegram(env, formdata, fullId, metadata, fileExt, fileName, fileType, url, clonedRequest, returnLink);
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}
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if (res.status === 200) {
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return res;
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} else {
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errMessages[channelList[i]] = 'Error: ' + channelList[i] + await res.text();
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}
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}
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}
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return new Response(JSON.stringify(errMessages), { status: 500 });
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}
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// 上传到Cloudflare R2
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async function uploadFileToCloudflareR2(env, formdata, fullId, metadata, returnLink) {
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// 检查R2数据库是否配置
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if (typeof env.img_r2 == "undefined" || env.img_r2 == null || env.img_r2 == "") {
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return new Response('Error: Please configure R2 database', { status: 500 });
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}
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const R2DataBase = env.img_r2;
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// 写入R2数据库
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await R2DataBase.put(fullId, formdata.get('file'));
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// 图像审查
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const R2PublicUrl = env.R2PublicUrl;
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const moderateUrl = `${R2PublicUrl}/${fullId}`;
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metadata = await moderateContent(env, moderateUrl, metadata);
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// 更新metadata，写入KV数据库
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try {
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metadata.Channel = "CloudflareR2";
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await env.img_url.put(fullId, "", {
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metadata: metadata,
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});
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} catch (error) {
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return new Response('Error: Failed to write to KV database', { status: 500 });
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}
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// 成功上传，将文件ID返回给客户端
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return new Response(
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JSON.stringify([{ 'src': `${returnLink}` }]),
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{
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}
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);
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}
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// 上传到Telegram
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async function uploadFileToTelegram(env, formdata, fullId, metadata, fileExt, fileName, fileType, url, clonedRequest, returnLink) {
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// 由于TG会把gif后缀的文件转为视频，所以需要修改后缀名绕过限制
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if (fileExt === 'gif') {
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const newFileName = fileName.replace(/\.gif$/, '.jpeg');
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const newFile = new File([formdata.get('file')], newFileName, { type: fileType });
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formdata.set('file', newFile);
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} else if (fileExt === 'webp') {
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const newFileName = fileName.replace(/\.webp$/, '.jpeg');
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const newFile = new File([formdata.get('file')], newFileName, { type: fileType });
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formdata.set('file', newFile);
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}
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// 选择对应的发送接口
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const fileTypeMap = {
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'image/': {'url': 'sendPhoto', 'type': 'photo'},
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'video/': {'url': 'sendVideo', 'type': 'video'},
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'audio/': {'url': 'sendAudio', 'type': 'audio'},
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'application/pdf': {'url': 'sendDocument', 'type': 'document'},
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};
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const defaultType = {'url': 'sendDocument', 'type': 'document'};
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let sendFunction = Object.keys(fileTypeMap).find(key => fileType.startsWith(key))
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? fileTypeMap[Object.keys(fileTypeMap).find(key => fileType.startsWith(key))]
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: defaultType;
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// GIF 发送接口特殊处理
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if (fileType === 'image/gif' || fileType === 'image/webp' || fileExt === 'gif' || fileExt === 'webp') {
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sendFunction = {'url': 'sendAnimation', 'type': 'animation'};
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}
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// 根据服务端压缩设置处理接口：从参数中获取serverCompress，如果为false，则使用sendDocument接口
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if (url.searchParams.get('serverCompress') === 'false') {
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sendFunction = {'url': 'sendDocument', 'type': 'document'};
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}
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// 根据发送接口向表单嵌入chat_id
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let newFormdata = new FormData();
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newFormdata.append('chat_id', env.TG_CHAT_ID);
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newFormdata.append(sendFunction.type, formdata.get('file'));
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// 构建目标 URL
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// const targetUrl = new URL(url.pathname, 'https://telegra.ph'); // telegraph接口，已失效，缅怀
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const targetUrl = new URL(`https://api.telegram.org/bot${env.TG_BOT_TOKEN}/${sendFunction.url}`); // telegram接口
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// 目标 URL 剔除 authCode 参数
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url.searchParams.forEach((value, key) => {
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if (key !== 'authCode') {
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targetUrl.searchParams.append(key, value);
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}
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});
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// 复制请求头并剔除 authCode
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const headers = new Headers(clonedRequest.headers);
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headers.delete('authCode');
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// 向目标 URL 发送请求
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let res = new Response('upload error, check your environment params about telegram channel!', { status: 400 });
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try {
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const response = await fetch(targetUrl.href, {
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method: clonedRequest.method,
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headers: {
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"User-Agent": " Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0"
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},
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body: newFormdata,
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});
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const clonedRes = await response.clone().json(); // 等待响应克隆和解析完成
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const fileInfo = getFile(clonedRes);
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const filePath = await getFilePath(env, fileInfo.file_id);
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const id = fileInfo.file_id;
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// 更新FileSize
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metadata.FileSize = (fileInfo.file_size / 1024 / 1024).toFixed(2);
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// 若上传成功，将响应返回给客户端
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if (response.ok) {
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res = new Response(
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JSON.stringify([{ 'src': `${returnLink}` }]),
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{
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}
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);
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}
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// 图像审查
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const moderateUrl = `https://api.telegram.org/file/bot${env.TG_BOT_TOKEN}/${filePath}`;
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metadata = await moderateContent(env, moderateUrl, metadata);
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// 更新metadata，写入KV数据库
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try {
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metadata.Channel = "TelegramNew";
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metadata.TgFileId = id;
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metadata.TgChatId = env.TG_CHAT_ID;
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metadata.TgBotToken = env.TG_BOT_TOKEN;
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await env.img_url.put(fullId, "", {
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metadata: metadata,
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});
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} catch (error) {
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res = new Response('Error: Failed to write to KV database', { status: 500 });
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}
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} catch (error) {
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res = new Response('upload error, check your environment params about telegram channel!', { status: 400 });
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} finally {
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return res;
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}
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}
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// 图像审查
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async function moderateContent(env, url, metadata) {
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const apikey = env.ModerateContentApiKey;
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if (apikey == undefined || apikey == null || apikey == "") {
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metadata.Label = "None";
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} else {
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try {
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const fetchResponse = await fetch(`https://api.moderatecontent.com/moderate/?key=${apikey}&url=${url}`);
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if (!fetchResponse.ok) {
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throw new Error(`HTTP error! status: ${fetchResponse.status}`);
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}
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const moderate_data = await fetchResponse.json();
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metadata.Label = moderate_data.rating_label;
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} catch (error) {
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console.error('Moderate Error:', error);
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// 将不带审查的图片写入数据库
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metadata.Label = "None";
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} finally {
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console.log('Moderate Done');
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}
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}
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return metadata;
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}
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function getFile(response) {
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try {
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if (!response.ok) {
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return null;
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}
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const getFileDetails = (file) => ({
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file_id: file.file_id,
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file_name: file.file_name || file.file_unique_id,
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file_size: file.file_size,
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});
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if (response.result.photo) {
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const largestPhoto = response.result.photo.reduce((prev, current) =>
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(prev.file_size > current.file_size) ? prev : current
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);
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return getFileDetails(largestPhoto);
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}
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if (response.result.video) {
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return getFileDetails(response.result.video);
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}
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if (response.result.audio) {
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return getFileDetails(response.result.audio);
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}
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if (response.result.document) {
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return getFileDetails(response.result.document);
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}
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return null;
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} catch (error) {
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console.error('Error getting file id:', error.message);
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return null;
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}
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}
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async function getFilePath(env, file_id) {
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try {
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const url = `https://api.telegram.org/bot${env.TG_BOT_TOKEN}/getFile?file_id=${file_id}`;
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const res = await fetch(url, {
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method: 'GET',
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headers: {
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"User-Agent": " Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome"
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},
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})
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let responseData = await res.json();
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if (responseData.ok) {
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const file_path = responseData.result.file_path
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return file_path
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} else {
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return null;
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}
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} catch (error) {
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return null;
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}
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}
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async function purgeCDNCache(env, cdnUrl, url) {
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const options = {
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method: 'POST',
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headers: {'Content-Type': 'application/json', 'X-Auth-Email': `${env.CF_EMAIL}`, 'X-Auth-Key': `${env.CF_API_KEY}`},
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body: `{"files":["${ cdnUrl }"]}`
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};
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await fetch(`https://api.cloudflare.com/client/v4/zones/${ env.CF_ZONE_ID }/purge_cache`, options);
|
||
|
||
// 清除api/randomFileList API缓存
|
||
try {
|
||
const cache = caches.default;
|
||
// await cache.delete(`${url.origin}/api/randomFileList`); delete有bug，通过写入一个max-age=0的response来清除缓存
|
||
const nullResponse = new Response(null, {
|
||
headers: { 'Cache-Control': 'max-age=0' },
|
||
});
|
||
await cache.put(`${url.origin}/api/randomFileList`, nullResponse);
|
||
} catch (error) {
|
||
console.error('Failed to clear cache:', error);
|
||
}
|
||
}
|
||
|
||
function isExtValid(fileExt) {
|
||
return ['jpeg', 'jpg', 'png', 'gif', 'webp',
|
||
'mp4', 'mp3', 'ogg',
|
||
'mp3', 'wav', 'flac', 'aac', 'opus',
|
||
'doc', 'docx', 'ppt', 'pptx', 'xls', 'xlsx', 'pdf',
|
||
'txt', 'md', 'json', 'xml', 'html', 'css', 'js', 'ts', 'go', 'java', 'php', 'py', 'rb', 'sh', 'bat', 'cmd', 'ps1', 'psm1', 'psd', 'ai', 'sketch', 'fig', 'svg', 'eps', 'zip', 'rar', '7z', 'tar', 'gz', 'bz2', 'xz', 'apk', 'exe', 'msi', 'dmg', 'iso', 'torrent', 'webp', 'ico', 'svg', 'ttf', 'otf', 'woff', 'woff2', 'eot', 'apk', 'crx', 'xpi', 'deb', 'rpm', 'jar', 'war', 'ear', 'img', 'iso', 'vdi', 'ova', 'ovf', 'qcow2', 'vmdk', 'vhd', 'vhdx', 'pvm', 'dsk', 'hdd', 'bin', 'cue', 'mds', 'mdf', 'nrg', 'ccd', 'cif', 'c2d', 'daa', 'b6t', 'b5t', 'bwt', 'isz', 'isz', 'cdi', 'flp', 'uif', 'xdi', 'sdi'
|
||
].includes(fileExt);
|
||
}
|
||
|
||
async function isBlockedUploadIp(env, uploadIp) {
|
||
// 检查是否配置了KV数据库
|
||
if (typeof env.img_url == "undefined" || env.img_url == null || env.img_url == "") {
|
||
return false;
|
||
}
|
||
|
||
const kv = env.img_url;
|
||
let list = await kv.get("manage@blockipList");
|
||
if (list == null) {
|
||
list = [];
|
||
} else {
|
||
list = list.split(",");
|
||
}
|
||
|
||
return list.includes(uploadIp);
|
||
} |