284 lines
7.1 KiB
Go
284 lines
7.1 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"github.com/gin-gonic/gin"
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"io"
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"net"
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"net/http"
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"os"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"time"
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)
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const (
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sizeLimit = 1024 * 1024 * 1024 * 2 // 允许的文件大小，默认2GB
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host = "0.0.0.0" // 监听地址
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port = 5000 // 监听端口
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)
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var (
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exps = []*regexp.Regexp{
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regexp.MustCompile(`^(?:https?://)?github\.com/([^/]+)/([^/]+)/(?:releases|archive)/.*$`),
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regexp.MustCompile(`^(?:https?://)?github\.com/([^/]+)/([^/]+)/(?:blob|raw)/.*$`),
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regexp.MustCompile(`^(?:https?://)?github\.com/([^/]+)/([^/]+)/(?:info|git-).*$`),
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regexp.MustCompile(`^(?:https?://)?raw\.github(?:usercontent|)\.com/([^/]+)/([^/]+)/.+?/.+$`),
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regexp.MustCompile(`^(?:https?://)?gist\.github(?:usercontent|)\.com/([^/]+)/.+?/.+`),
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regexp.MustCompile(`^(?:https?://)?api\.github\.com/repos/([^/]+)/([^/]+)/.*`),
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regexp.MustCompile(`^(?:https?://)?huggingface\.co(?:/spaces)?/([^/]+)/(.+)$`),
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regexp.MustCompile(`^(?:https?://)?cdn-lfs\.hf\.co(?:/spaces)?/([^/]+)/([^/]+)(?:/(.*))?$`),
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regexp.MustCompile(`^(?:https?://)?download\.docker\.com/([^/]+)/.*\.(tgz|zip)$`),
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regexp.MustCompile(`^(?:https?://)?(github|opengraph)\.githubassets\.com/([^/]+)/.+?$`),
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}
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httpClient *http.Client
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config *Config
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configLock sync.RWMutex
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)
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type Config struct {
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WhiteList []string `json:"whiteList"`
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BlackList []string `json:"blackList"`
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}
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func main() {
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gin.SetMode(gin.ReleaseMode)
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router := gin.Default()
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httpClient = &http.Client{
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Transport: &http.Transport{
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DialContext: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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}).DialContext,
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MaxIdleConns: 1000,
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MaxIdleConnsPerHost: 1000,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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ResponseHeaderTimeout: 300 * time.Second,
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},
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}
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loadConfig()
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go func() {
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for {
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time.Sleep(10 * time.Minute)
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loadConfig()
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}
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}()
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// 初始化Skopeo相关路由 - 在任何通配符路由之前注册
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initSkopeoRoutes(router)
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// 单独处理根路径请求，避免冲突
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router.GET("/", func(c *gin.Context) {
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c.File("./public/index.html")
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})
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// 指定具体的静态文件路径，避免使用通配符
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router.Static("/public", "./public")
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// 对于.html等特定文件注册
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router.GET("/skopeo.html", func(c *gin.Context) {
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c.File("./public/skopeo.html")
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})
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router.GET("/search.html", func(c *gin.Context) {
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c.File("./public/search.html")
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})
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// 图标文件
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router.GET("/favicon.ico", func(c *gin.Context) {
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c.File("./public/favicon.ico")
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})
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router.GET("/bj.svg", func(c *gin.Context) {
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c.File("./public/bj.svg")
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})
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// 注册dockerhub搜索路由
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RegisterSearchRoute(router)
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// 创建GitHub文件下载专用的限流器
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githubLimiter := NewIPRateLimiter()
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// 注册NoRoute处理器，应用限流中间件
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router.NoRoute(RateLimitMiddleware(githubLimiter), handler)
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err := router.Run(fmt.Sprintf("%s:%d", host, port))
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if err != nil {
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fmt.Printf("Error starting server: %v\n", err)
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}
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}
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func handler(c *gin.Context) {
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rawPath := strings.TrimPrefix(c.Request.URL.RequestURI(), "/")
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for strings.HasPrefix(rawPath, "/") {
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rawPath = strings.TrimPrefix(rawPath, "/")
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}
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if !strings.HasPrefix(rawPath, "http") {
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c.String(http.StatusForbidden, "无效输入")
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return
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}
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matches := checkURL(rawPath)
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if matches != nil {
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if len(config.WhiteList) > 0 && !checkList(matches, config.WhiteList) {
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c.String(http.StatusForbidden, "不在白名单内，限制访问。")
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return
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}
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if len(config.BlackList) > 0 && checkList(matches, config.BlackList) {
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c.String(http.StatusForbidden, "黑名单限制访问")
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return
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}
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} else {
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c.String(http.StatusForbidden, "无效输入")
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return
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}
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if exps[1].MatchString(rawPath) {
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rawPath = strings.Replace(rawPath, "/blob/", "/raw/", 1)
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}
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proxy(c, rawPath)
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}
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func proxy(c *gin.Context, u string) {
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req, err := http.NewRequest(c.Request.Method, u, c.Request.Body)
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if err != nil {
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c.String(http.StatusInternalServerError, fmt.Sprintf("server error %v", err))
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return
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}
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for key, values := range c.Request.Header {
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for _, value := range values {
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req.Header.Add(key, value)
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}
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}
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req.Header.Del("Host")
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resp, err := httpClient.Do(req)
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if err != nil {
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c.String(http.StatusInternalServerError, fmt.Sprintf("server error %v", err))
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return
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}
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defer func(Body io.ReadCloser) {
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err := Body.Close()
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if err != nil {
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}
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}(resp.Body)
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// 检查文件大小限制
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if contentLength := resp.Header.Get("Content-Length"); contentLength != "" {
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if size, err := strconv.Atoi(contentLength); err == nil && size > sizeLimit {
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c.String(http.StatusRequestEntityTooLarge, "File too large.")
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return
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}
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}
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// 清理安全相关的头
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resp.Header.Del("Content-Security-Policy")
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resp.Header.Del("Referrer-Policy")
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resp.Header.Del("Strict-Transport-Security")
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// 对于需要处理的shell文件，我们使用chunked传输
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isShellFile := strings.HasSuffix(strings.ToLower(u), ".sh")
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if isShellFile {
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resp.Header.Del("Content-Length")
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resp.Header.Set("Transfer-Encoding", "chunked")
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}
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// 复制其他响应头
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for key, values := range resp.Header {
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for _, value := range values {
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c.Header(key, value)
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}
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}
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if location := resp.Header.Get("Location"); location != "" {
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if checkURL(location) != nil {
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c.Header("Location", "/"+location)
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} else {
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proxy(c, location)
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return
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}
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}
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c.Status(resp.StatusCode)
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// 处理响应体
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if isShellFile {
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// 获取真实域名
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realHost := c.Request.Header.Get("X-Forwarded-Host")
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if realHost == "" {
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realHost = c.Request.Host
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}
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// 如果域名中没有协议前缀，添加https://
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if !strings.HasPrefix(realHost, "http://") && !strings.HasPrefix(realHost, "https://") {
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realHost = "https://" + realHost
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}
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// 使用ProcessGitHubURLs处理.sh文件
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processedBody, _, err := ProcessGitHubURLs(resp.Body, resp.Header.Get("Content-Encoding") == "gzip", realHost, true)
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if err != nil {
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c.String(http.StatusInternalServerError, fmt.Sprintf("处理shell文件时发生错误: %v", err))
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return
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}
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if _, err := io.Copy(c.Writer, processedBody); err != nil {
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c.String(http.StatusInternalServerError, fmt.Sprintf("写入响应时发生错误: %v", err))
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return
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}
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} else {
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// 对于非.sh文件，直接复制响应体
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if _, err := io.Copy(c.Writer, resp.Body); err != nil {
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return
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}
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}
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}
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func loadConfig() {
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file, err := os.Open("config.json")
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if err != nil {
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fmt.Printf("Error loading config: %v\n", err)
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return
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}
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defer func(file *os.File) {
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err := file.Close()
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if err != nil {
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}
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}(file)
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var newConfig Config
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decoder := json.NewDecoder(file)
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if err := decoder.Decode(&newConfig); err != nil {
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fmt.Printf("Error decoding config: %v\n", err)
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return
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}
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configLock.Lock()
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config = &newConfig
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configLock.Unlock()
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}
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func checkURL(u string) []string {
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for _, exp := range exps {
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if matches := exp.FindStringSubmatch(u); matches != nil {
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return matches[1:]
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}
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}
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return nil
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}
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func checkList(matches, list []string) bool {
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for _, item := range list {
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if strings.HasPrefix(matches[0], item) {
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return true
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}
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}
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return false
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}
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