feat: add google_drive driver

drivers/google_drive/util.go

@@ -0,0 +1,97 @@
+package google_drive
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/alist-org/alist/v3/drivers/base"
+	"github.com/go-resty/resty/v2"
+	log "github.com/sirupsen/logrus"
+)
+
+// do others that not defined in Driver interface
+
+func (d *GoogleDrive) refreshToken() error {
+	url := "https://www.googleapis.com/oauth2/v4/token"
+	var resp base.TokenResp
+	var e TokenError
+	res, err := base.RestyClient.R().SetResult(&resp).SetError(&e).
+		SetFormData(map[string]string{
+			"client_id":     d.ClientID,
+			"client_secret": d.ClientSecret,
+			"refresh_token": d.RefreshToken,
+			"grant_type":    "refresh_token",
+		}).Post(url)
+	if err != nil {
+		return err
+	}
+	log.Debug(res.String())
+	if e.Error != "" {
+		return fmt.Errorf(e.Error)
+	}
+	d.AccessToken = resp.AccessToken
+	return nil
+}
+
+func (d *GoogleDrive) request(url string, method string, callback base.ReqCallback, resp interface{}) ([]byte, error) {
+	req := base.RestyClient.R()
+	req.SetHeader("Authorization", "Bearer "+d.AccessToken)
+	req.SetQueryParam("includeItemsFromAllDrives", "true")
+	req.SetQueryParam("supportsAllDrives", "true")
+	if callback != nil {
+		callback(req)
+	}
+	if resp != nil {
+		req.SetResult(resp)
+	}
+	var e Error
+	req.SetError(&e)
+	res, err := req.Execute(method, url)
+	if err != nil {
+		return nil, err
+	}
+	if e.Error.Code != 0 {
+		if e.Error.Code == 401 {
+			err = d.refreshToken()
+			if err != nil {
+				return nil, err
+			}
+			return d.request(url, method, callback, resp)
+		}
+		return nil, fmt.Errorf("%s: %v", e.Error.Message, e.Error.Errors)
+	}
+	return res.Body(), nil
+}
+
+func (d *GoogleDrive) getFiles(id string) ([]File, error) {
+	pageToken := "first"
+	res := make([]File, 0)
+	for pageToken != "" {
+		if pageToken == "first" {
+			pageToken = ""
+		}
+		var resp Files
+		orderBy := "folder,name,modifiedTime desc"
+		if d.OrderBy != "" {
+			orderBy = d.OrderBy + " " + d.OrderDirection
+		}
+		query := map[string]string{
+			"orderBy":  orderBy,
+			"fields":   "files(id,name,mimeType,size,modifiedTime,thumbnailLink),nextPageToken",
+			"pageSize": "1000",
+			"q":        fmt.Sprintf("'%s' in parents and trashed = false", id),
+			//"includeItemsFromAllDrives": "true",
+			//"supportsAllDrives":         "true",
+			"pageToken": pageToken,
+		}
+		_, err := d.request("https://www.googleapis.com/drive/v3/files", http.MethodGet, func(req *resty.Request) {
+			req.SetQueryParams(query)
+		}, &resp)
+		if err != nil {
+			return nil, err
+		}
+		pageToken = resp.NextPageToken
+		res = append(res, resp.Files...)
+	}
+	return res, nil
+}