mirror of
https://github.com/WJQSERVER-STUDIO/ghproxy.git
synced 2026-02-03 00:01:10 +08:00
327 lines
8.5 KiB
Go
327 lines
8.5 KiB
Go
package proxy
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import (
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"bufio"
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"compress/gzip"
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"fmt"
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"ghproxy/config"
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"io"
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"net/http"
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"net/url"
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"regexp"
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"strings"
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"github.com/cloudwego/hertz/pkg/app"
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hresp "github.com/cloudwego/hertz/pkg/protocol/http1/resp"
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"github.com/valyala/bytebufferpool"
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)
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// 定义错误类型, error承载描述, 便于处理
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type MatcherErrors struct {
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Code int
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Msg string
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Err error
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}
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var (
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ErrInvalidURL = &MatcherErrors{
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Code: 403,
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Msg: "Invalid URL Format",
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}
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ErrAuthHeaderUnavailable = &MatcherErrors{
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Code: 403,
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Msg: "AuthHeader Unavailable",
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}
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)
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func (e *MatcherErrors) Error() string {
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if e.Err != nil {
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return fmt.Sprintf("Code: %d, Msg: %s, Err: %s", e.Code, e.Msg, e.Err.Error())
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}
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return fmt.Sprintf("Code: %d, Msg: %s", e.Code, e.Msg)
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}
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func (e *MatcherErrors) Unwrap() error {
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return e.Err
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}
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func Matcher(rawPath string, cfg *config.Config) (string, string, string, error) {
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var (
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user string
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repo string
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matcher string
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)
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// 匹配 "https://github.com"开头的链接
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if strings.HasPrefix(rawPath, "https://github.com") {
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remainingPath := strings.TrimPrefix(rawPath, "https://github.com")
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if strings.HasPrefix(remainingPath, "/") {
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remainingPath = strings.TrimPrefix(remainingPath, "/")
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}
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// 预期格式/user/repo/more...
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// 取出user和repo和最后部分
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parts := strings.Split(remainingPath, "/")
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if len(parts) <= 2 {
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return "", "", "", ErrInvalidURL
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}
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user = parts[0]
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repo = parts[1]
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// 匹配 "https://github.com"开头的链接
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if len(parts) >= 3 {
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switch parts[2] {
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case "releases", "archive":
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matcher = "releases"
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case "blob", "raw":
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matcher = "blob"
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case "info", "git-upload-pack":
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matcher = "clone"
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default:
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return "", "", "", ErrInvalidURL
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}
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}
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return user, repo, matcher, nil
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}
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// 匹配 "https://raw"开头的链接
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if strings.HasPrefix(rawPath, "https://raw") {
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remainingPath := strings.TrimPrefix(rawPath, "https://")
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parts := strings.Split(remainingPath, "/")
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if len(parts) <= 3 {
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return "", "", "", ErrInvalidURL
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}
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user = parts[1]
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repo = parts[2]
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matcher = "raw"
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return user, repo, matcher, nil
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}
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// 匹配 "https://gist"开头的链接
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if strings.HasPrefix(rawPath, "https://gist") {
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remainingPath := strings.TrimPrefix(rawPath, "https://")
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parts := strings.Split(remainingPath, "/")
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if len(parts) <= 3 {
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return "", "", "", ErrInvalidURL
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}
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user = parts[1]
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repo = ""
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matcher = "gist"
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return user, repo, matcher, nil
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}
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// 匹配 "https://api.github.com/"开头的链接
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if strings.HasPrefix(rawPath, "https://api.github.com/") {
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matcher = "api"
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remainingPath := strings.TrimPrefix(rawPath, "https://api.github.com/")
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parts := strings.Split(remainingPath, "/")
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if parts[0] == "repos" {
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user = parts[1]
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repo = parts[2]
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}
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if parts[0] == "users" {
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user = parts[1]
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}
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if !cfg.Auth.ForceAllowApi {
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if cfg.Auth.AuthMethod != "header" || !cfg.Auth.Enabled {
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return "", "", "", ErrAuthHeaderUnavailable
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}
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}
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return user, repo, matcher, nil
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}
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return "", "", "", ErrInvalidURL
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}
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func EditorMatcher(rawPath string, cfg *config.Config) (bool, string, error) {
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var (
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matcher string
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)
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// 匹配 "https://github.com"开头的链接
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if strings.HasPrefix(rawPath, "https://github.com") {
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remainingPath := strings.TrimPrefix(rawPath, "https://github.com")
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if strings.HasPrefix(remainingPath, "/") {
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remainingPath = strings.TrimPrefix(remainingPath, "/")
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}
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return true, "", nil
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}
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// 匹配 "https://raw.githubusercontent.com"开头的链接
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if strings.HasPrefix(rawPath, "https://raw.githubusercontent.com") {
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return true, matcher, nil
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}
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// 匹配 "https://raw.github.com"开头的链接
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if strings.HasPrefix(rawPath, "https://raw.github.com") {
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return true, matcher, nil
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}
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// 匹配 "https://gist.githubusercontent.com"开头的链接
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if strings.HasPrefix(rawPath, "https://gist.githubusercontent.com") {
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return true, matcher, nil
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}
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// 匹配 "https://gist.github.com"开头的链接
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if strings.HasPrefix(rawPath, "https://gist.github.com") {
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return true, matcher, nil
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}
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// 匹配 "https://api.github.com/"开头的链接
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if strings.HasPrefix(rawPath, "https://api.github.com") {
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matcher = "api"
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return true, matcher, nil
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}
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return false, "", ErrInvalidURL
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}
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// 匹配文件扩展名是sh的rawPath
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func MatcherShell(rawPath string) bool {
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if strings.HasSuffix(rawPath, ".sh") {
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return true
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}
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return false
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}
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// LinkProcessor 是一个函数类型，用于处理提取到的链接。
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type LinkProcessor func(string) string
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// 自定义 URL 修改函数
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func modifyURL(url string, host string, cfg *config.Config) string {
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// 去除url内的https://或http://
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matched, _, err := EditorMatcher(url, cfg)
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if err != nil {
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logDump("Invalid URL: %s", url)
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return url
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}
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if matched {
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u := strings.TrimPrefix(url, "https://")
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u = strings.TrimPrefix(url, "http://")
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logDump("Modified URL: %s", "https://"+host+"/"+u)
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return "https://" + host + "/" + u
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}
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return url
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}
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var (
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matchedMatchers = []string{
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"blob",
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"raw",
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"gist",
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}
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)
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// matchString 检查目标字符串是否在给定的字符串集合中
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func matchString(target string, stringsToMatch []string) bool {
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matchMap := make(map[string]struct{}, len(stringsToMatch))
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for _, str := range stringsToMatch {
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matchMap[str] = struct{}{}
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}
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_, exists := matchMap[target]
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return exists
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}
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// processLinksAndWriteChunked 处理链接并将结果以 chunked 方式写入响应
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func ProcessLinksAndWriteChunked(input io.Reader, compress string, host string, cfg *config.Config, c *app.RequestContext) error {
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var reader *bufio.Reader
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if compress == "gzip" {
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// 解压 gzip
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gzipReader, err := gzip.NewReader(input)
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if err != nil {
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c.String(http.StatusInternalServerError, fmt.Sprintf("gzip 解压错误: %v", err))
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return fmt.Errorf("gzip 解压错误: %w", err)
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}
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defer gzipReader.Close()
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reader = bufio.NewReader(gzipReader)
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} else {
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reader = bufio.NewReader(input)
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}
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// 获取 chunked body writer
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chunkedWriter := hresp.NewChunkedBodyWriter(&c.Response, c.GetWriter())
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var writer io.Writer = chunkedWriter
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var gzipWriter *gzip.Writer
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if compress == "gzip" {
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gzipWriter = gzip.NewWriter(writer)
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writer = gzipWriter
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defer func() {
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if err := gzipWriter.Close(); err != nil {
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logError("gzipWriter close failed: %v", err)
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}
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}()
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}
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bufWrapper := bytebufferpool.Get()
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buf := bufWrapper.B
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size := 32768 // 32KB
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buf = buf[:cap(buf)]
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if len(buf) < size {
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buf = append(buf, make([]byte, size-len(buf))...)
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}
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buf = buf[:size] // 将缓冲区限制为 'size'
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defer bytebufferpool.Put(bufWrapper)
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urlPattern := regexp.MustCompile(`https?://[^\s'"]+`)
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scanner := bufio.NewScanner(reader)
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for scanner.Scan() {
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line := scanner.Text()
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modifiedLine := urlPattern.ReplaceAllStringFunc(line, func(originalURL string) string {
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return modifyURL(originalURL, host, cfg)
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})
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modifiedLineWithNewline := modifiedLine + "\n"
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_, err := writer.Write([]byte(modifiedLineWithNewline))
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if err != nil {
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logError("写入 chunk 错误: %v", err)
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return fmt.Errorf("写入 chunk 错误: %w", err)
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}
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if compress != "gzip" {
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if fErr := chunkedWriter.Flush(); fErr != nil {
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logError("chunkedWriter flush failed: %v", fErr)
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return fmt.Errorf("chunkedWriter flush failed: %w", fErr)
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}
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}
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}
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if err := scanner.Err(); err != nil {
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logError("读取输入错误: %v", err)
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c.String(http.StatusInternalServerError, fmt.Sprintf("读取输入错误: %v", err))
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return fmt.Errorf("读取输入错误: %w", err)
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}
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// 对于 gzip，chunkedWriter 的关闭会触发最后的 chunk
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if compress != "gzip" {
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if fErr := chunkedWriter.Flush(); fErr != nil {
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logError("final chunkedWriter flush failed: %v", fErr)
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return fmt.Errorf("final chunkedWriter flush failed: %w", fErr)
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}
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}
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return nil // 成功完成处理
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}
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// extractParts 从给定的 URL 中提取所需的部分
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func extractParts(rawURL string) (string, string, string, url.Values, error) {
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// 解析 URL
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parsedURL, err := url.Parse(rawURL)
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if err != nil {
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return "", "", "", nil, err
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}
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// 获取路径部分并分割
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pathParts := strings.Split(parsedURL.Path, "/")
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// 提取所需的部分
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if len(pathParts) < 3 {
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return "", "", "", nil, fmt.Errorf("URL path is too short")
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}
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// 提取 /WJQSERVER-STUDIO 和 /go-utils.git
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repoOwner := "/" + pathParts[1]
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repoName := "/" + pathParts[2]
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// 剩余部分
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remainingPath := strings.Join(pathParts[3:], "/")
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if remainingPath != "" {
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remainingPath = "/" + remainingPath
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}
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// 查询参数
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queryParams := parsedURL.Query()
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return repoOwner, repoName, remainingPath, queryParams, nil
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}
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