personal workspace backend flush

go_cloud/internal/storage/webdav.go

@@ -0,0 +1,113 @@
+package storage
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"path"
+	"strings"
+
+	"go.b0esche.cloud/backend/internal/config"
+)
+
+type WebDAVClient struct {
+	baseURL    string
+	user       string
+	pass       string
+	basePrefix string
+	httpClient *http.Client
+}
+
+// NewWebDAVClient returns nil if no Nextcloud URL configured
+func NewWebDAVClient(cfg *config.Config) *WebDAVClient {
+	if cfg == nil || strings.TrimSpace(cfg.NextcloudURL) == "" {
+		return nil
+	}
+	u := strings.TrimRight(cfg.NextcloudURL, "/")
+	base := cfg.NextcloudBase
+	if base == "" {
+		base = "/"
+	}
+	return &WebDAVClient{
+		baseURL:    u,
+		user:       cfg.NextcloudUser,
+		pass:       cfg.NextcloudPass,
+		basePrefix: strings.TrimRight(base, "/"),
+		httpClient: &http.Client{},
+	}
+}
+
+// ensureParent creates intermediate collections using MKCOL. Ignoring errors when already exists.
+func (c *WebDAVClient) ensureParent(ctx context.Context, remotePath string) error {
+	// build incremental paths
+	dir := path.Dir(remotePath)
+	if dir == "." || dir == "/" || dir == "" {
+		return nil
+	}
+	// split and build prefixes
+	parts := strings.Split(strings.Trim(dir, "/"), "/")
+	cur := c.basePrefix
+	for _, p := range parts {
+		cur = path.Join(cur, p)
+		mkurl := fmt.Sprintf("%s%s", c.baseURL, cur)
+		req, _ := http.NewRequestWithContext(ctx, "MKCOL", mkurl, nil)
+		if c.user != "" {
+			req.SetBasicAuth(c.user, c.pass)
+		}
+		resp, err := c.httpClient.Do(req)
+		if err != nil {
+			return err
+		}
+		resp.Body.Close()
+		// 201 created, 405 exists — ignore
+		if resp.StatusCode == 201 || resp.StatusCode == 405 {
+			continue
+		}
+	}
+	return nil
+}
+
+// Upload streams the content to the remotePath using HTTP PUT (WebDAV). remotePath should be absolute under basePrefix.
+func (c *WebDAVClient) Upload(ctx context.Context, remotePath string, r io.Reader, size int64) error {
+	if c == nil {
+		return fmt.Errorf("no webdav client configured")
+	}
+	// Ensure parent collections
+	if err := c.ensureParent(ctx, remotePath); err != nil {
+		return err
+	}
+	// Construct URL
+	// remotePath might be like /orgs/<id>/file.txt; ensure it joins to basePrefix
+	rel := strings.TrimLeft(remotePath, "/")
+	u := c.basePrefix
+	if u == "/" || u == "" {
+		u = "/"
+	}
+	full := fmt.Sprintf("%s%s/%s", c.baseURL, u, url.PathEscape(rel))
+	full = strings.ReplaceAll(full, "%2F", "/")
+
+	req, err := http.NewRequestWithContext(ctx, "PUT", full, r)
+	if err != nil {
+		return err
+	}
+	if size > 0 {
+		req.ContentLength = size
+	}
+	if c.user != "" {
+		req.SetBasicAuth(c.user, c.pass)
+	}
+	req.Header.Set("Content-Type", "application/octet-stream")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+		return nil
+	}
+	body, _ := io.ReadAll(resp.Body)
+	return fmt.Errorf("webdav upload failed: %d %s", resp.StatusCode, string(body))
+}