重构项目

pkg/core/page.go

@@ -0,0 +1,75 @@
+package core
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"os"
+)
+
+type PageVFS struct {
+	backend Backend
+	client  *http.Client
+
+	org      string
+	repo     string
+	commitID string
+}
+
+func NewPageVFS(
+	client *http.Client,
+	backend Backend,
+	org string,
+	repo string,
+	commitID string,
+) *PageVFS {
+	return &PageVFS{
+		client:   client,
+		backend:  backend,
+		org:      org,
+		repo:     repo,
+		commitID: commitID,
+	}
+}
+
+func (p *PageVFS) NativeOpen(ctx context.Context, path string, headers http.Header) (*http.Response, error) {
+	return p.backend.Open(ctx, p.client, p.org, p.repo, p.commitID, path, headers)
+}
+
+func (p *PageVFS) Exists(ctx context.Context, path string) (bool, error) {
+	open, err := p.NativeOpen(ctx, path, nil)
+	if open != nil {
+		defer open.Body.Close()
+	}
+	if err != nil || open == nil {
+		return false, err
+	}
+	if open.StatusCode != http.StatusOK {
+		return false, nil
+	}
+	return true, nil
+}
+
+func (p *PageVFS) Open(ctx context.Context, path string) (io.ReadCloser, error) {
+	resp, err := p.NativeOpen(ctx, path, nil)
+	if err != nil {
+		if resp != nil {
+			_ = resp.Body.Close()
+		}
+		return nil, err
+	}
+	if resp.StatusCode != http.StatusOK {
+		_ = resp.Body.Close()
+		return nil, os.ErrNotExist
+	}
+	return resp.Body, nil
+}
+
+func (p *PageVFS) Read(ctx context.Context, path string) ([]byte, error) {
+	open, err := p.Open(ctx, path)
+	if err != nil {
+		return nil, err
+	}
+	defer open.Close()
+	return io.ReadAll(open)
+}