feat(github_releases): add support for github_releases driver (#7844 close #7842)

* feat(github_releases): 添加对 GitHub Releases 的支持

* feat(github_releases): 增加目录大小和更新时间，增加请求缓存

* Feat(github_releases): 可选填入 GitHub token 来提高速率限制或访问私有仓库

* Fix(github_releases): 修复仓库无权限或不存在时的异常

* feat(github_releases): 支持显示所有版本，开启后不显示文件夹大小

* feat(github_releases): 兼容无子目录

drivers/github_releases/driver.go

@@ -0,0 +1,153 @@
+package github_releases
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"time"
+
+	"strings"
+
+	"github.com/alist-org/alist/v3/internal/driver"
+	"github.com/alist-org/alist/v3/internal/errs"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/pkg/utils"
+)
+
+type GithubReleases struct {
+	model.Storage
+	Addition
+
+	releases []Release
+}
+
+func (d *GithubReleases) Config() driver.Config {
+	return config
+}
+
+func (d *GithubReleases) GetAddition() driver.Additional {
+	return &d.Addition
+}
+
+func (d *GithubReleases) Init(ctx context.Context) error {
+	SetHeader(d.Addition.Token)
+	repos, err := ParseRepos(d.Addition.RepoStructure, d.Addition.ShowAllVersion)
+	if err != nil {
+		return err
+	}
+	d.releases = repos
+	return nil
+}
+
+func (d *GithubReleases) Drop(ctx context.Context) error {
+	ClearCache()
+	return nil
+}
+
+func (d *GithubReleases) List(ctx context.Context, dir model.Obj, args model.ListArgs) ([]model.Obj, error) {
+	files := make([]File, 0)
+	path := fmt.Sprintf("/%s", strings.Trim(dir.GetPath(), "/"))
+
+	for _, repo := range d.releases {
+		if repo.Path == path { // 与仓库路径相同
+			resp, err := GetRepoReleaseInfo(repo.RepoName, repo.ID, path, d.Storage.CacheExpiration)
+			if err != nil {
+				return nil, err
+			}
+			files = append(files, resp.Files...)
+
+			if d.Addition.ShowReadme {
+				resp, err := GetGithubOtherFile(repo.RepoName, path, d.Storage.CacheExpiration)
+				if err != nil {
+					return nil, err
+				}
+				files = append(files, *resp...)
+			}
+
+		} else if strings.HasPrefix(repo.Path, path) { // 仓库路径是目录的子目录
+			nextDir := GetNextDir(repo.Path, path)
+			if nextDir == "" {
+				continue
+			}
+			if d.Addition.ShowAllVersion {
+				files = append(files, File{
+					FileName: nextDir,
+					Size:     0,
+					CreateAt: time.Time{},
+					UpdateAt: time.Time{},
+					Url:      "",
+					Type:     "dir",
+					Path:     fmt.Sprintf("%s/%s", path, nextDir),
+				})
+				continue
+			}
+
+			repo, _ := GetRepoReleaseInfo(repo.RepoName, repo.Version, path, d.Storage.CacheExpiration)
+
+			hasSameDir := false
+			for index, file := range files {
+				if file.FileName == nextDir {
+					hasSameDir = true
+					files[index].Size += repo.Size
+					files[index].UpdateAt = func(a time.Time, b time.Time) time.Time {
+						if a.After(b) {
+							return a
+						}
+						return b
+					}(files[index].UpdateAt, repo.UpdateAt)
+					break
+				}
+			}
+
+			if !hasSameDir {
+				files = append(files, File{
+					FileName: nextDir,
+					Size:     repo.Size,
+					CreateAt: repo.CreateAt,
+					UpdateAt: repo.UpdateAt,
+					Url:      repo.Url,
+					Type:     "dir",
+					Path:     fmt.Sprintf("%s/%s", path, nextDir),
+				})
+			}
+		}
+	}
+
+	return utils.SliceConvert(files, func(src File) (model.Obj, error) {
+		return src, nil
+	})
+}
+
+func (d *GithubReleases) Link(ctx context.Context, file model.Obj, args model.LinkArgs) (*model.Link, error) {
+	link := model.Link{
+		URL:    file.GetID(),
+		Header: http.Header{},
+	}
+	return &link, nil
+}
+
+func (d *GithubReleases) MakeDir(ctx context.Context, parentDir model.Obj, dirName string) (model.Obj, error) {
+	return nil, errs.NotImplement
+}
+
+func (d *GithubReleases) Move(ctx context.Context, srcObj, dstDir model.Obj) (model.Obj, error) {
+	return nil, errs.NotImplement
+}
+
+func (d *GithubReleases) Rename(ctx context.Context, srcObj model.Obj, newName string) (model.Obj, error) {
+	return nil, errs.NotImplement
+}
+
+func (d *GithubReleases) Copy(ctx context.Context, srcObj, dstDir model.Obj) (model.Obj, error) {
+	return nil, errs.NotImplement
+}
+
+func (d *GithubReleases) Remove(ctx context.Context, obj model.Obj) error {
+	return errs.NotImplement
+}
+
+func (d *GithubReleases) Put(ctx context.Context, dstDir model.Obj, stream model.FileStreamer, up driver.UpdateProgress) (model.Obj, error) {
+	return nil, errs.NotImplement
+}
+
+var _ driver.Driver = (*GithubReleases)(nil)