Feat: cos policy upload/download in server-side

pkg/filesystem/driver/cos/handller.go

@@ -11,6 +11,7 @@ import (
 	model "github.com/HFO4/cloudreve/models"
 	"github.com/HFO4/cloudreve/pkg/filesystem/fsctx"
 	"github.com/HFO4/cloudreve/pkg/filesystem/response"
+	"github.com/HFO4/cloudreve/pkg/request"
 	"github.com/HFO4/cloudreve/pkg/serializer"
 	"github.com/google/go-querystring/query"
 	cossdk "github.com/tencentyun/cos-go-sdk-v5"
@@ -40,18 +41,52 @@ type urlOption struct {
 
 // Driver 腾讯云COS适配器模板
 type Driver struct {
-	Policy *model.Policy
-	Client *cossdk.Client
+	Policy     *model.Policy
+	Client     *cossdk.Client
+	HTTPClient request.Client
 }
 
 // Get 获取文件
 func (handler Driver) Get(ctx context.Context, path string) (response.RSCloser, error) {
-	return nil, errors.New("未实现")
+	// 获取文件源地址
+	downloadURL, err := handler.Source(
+		ctx,
+		path,
+		url.URL{},
+		int64(model.GetIntSetting("preview_timeout", 60)),
+		false,
+		0,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// 获取文件数据流
+	resp, err := handler.HTTPClient.Request(
+		"GET",
+		downloadURL,
+		nil,
+		request.WithContext(ctx),
+	).CheckHTTPResponse(200).GetRSCloser()
+	if err != nil {
+		return nil, err
+	}
+
+	resp.SetFirstFakeChunk()
+
+	// 尝试自主获取文件大小
+	if file, ok := ctx.Value(fsctx.FileModelCtx).(model.File); ok {
+		resp.SetContentLength(int64(file.Size))
+	}
+
+	return resp, nil
 }
 
 // Put 将文件流保存到指定目录
 func (handler Driver) Put(ctx context.Context, file io.ReadCloser, dst string, size uint64) error {
-	return errors.New("未实现")
+	opt := &cossdk.ObjectPutOptions{}
+	_, err := handler.Client.Object.Put(ctx, dst, file, opt)
+	return err
 }
 
 // Delete 删除一个或多个文件，