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Open-source lightweight git hosting.
release_assets.go
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221 lines
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6.7 KB
| 1 | package repo |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/rand" |
| 6 | "database/sql" |
| 7 | "encoding/hex" |
| 8 | "errors" |
| 9 | "fmt" |
| 10 | "os" |
| 11 | "path/filepath" |
| 12 | "strconv" |
| 13 | "strings" |
| 14 | "time" |
| 15 | "unicode/utf8" |
| 16 | ) |
| 17 | |
| 18 | var ( |
| 19 | ErrReleaseAssetNotFound = errors.New("release asset not found") |
| 20 | ErrReleaseAssetInvalid = errors.New("invalid release asset") |
| 21 | ) |
| 22 | |
| 23 | // ReleaseAsset is an uploaded file attached to a release. |
| 24 | type ReleaseAsset struct { |
| 25 | ID int64 |
| 26 | ReleaseID int64 |
| 27 | UploaderID int64 |
| 28 | Filename string |
| 29 | StoredName string |
| 30 | Size int64 |
| 31 | ContentType string |
| 32 | DownloadCount int64 |
| 33 | CreatedAt time.Time |
| 34 | } |
| 35 | |
| 36 | // releaseAssetsSubdir lives inside the bare repository directory, so repo |
| 37 | // deletion and renaming handle asset files together with the git data. |
| 38 | const releaseAssetsSubdir = "polar-release-assets" |
| 39 | |
| 40 | // ReleaseAssetsDir returns the on-disk directory for a release's uploaded assets. |
| 41 | func (s *Service) ReleaseAssetsDir(ownerUsername, repoName string, releaseID int64) (string, error) { |
| 42 | if releaseID <= 0 { |
| 43 | return "", ErrReleaseAssetNotFound |
| 44 | } |
| 45 | diskPath, err := s.DiskPath(ownerUsername, repoName) |
| 46 | if err != nil { |
| 47 | return "", err |
| 48 | } |
| 49 | return filepath.Join(diskPath, releaseAssetsSubdir, strconv.FormatInt(releaseID, 10)), nil |
| 50 | } |
| 51 | |
| 52 | // sanitizeAssetFilename reduces an uploaded name to a safe base name. |
| 53 | func sanitizeAssetFilename(name string) (string, error) { |
| 54 | name = strings.TrimSpace(strings.ReplaceAll(name, "\\", "/")) |
| 55 | if idx := strings.LastIndex(name, "/"); idx >= 0 { |
| 56 | name = name[idx+1:] |
| 57 | } |
| 58 | name = strings.Map(func(r rune) rune { |
| 59 | if r < 32 || r == 127 || strings.ContainsRune("<>:\"|?*", r) { |
| 60 | return -1 |
| 61 | } |
| 62 | return r |
| 63 | }, name) |
| 64 | name = strings.Trim(name, ". ") |
| 65 | if name == "" { |
| 66 | return "", ErrReleaseAssetInvalid |
| 67 | } |
| 68 | for len(name) > 180 { |
| 69 | _, size := utf8.DecodeLastRuneInString(name) |
| 70 | if size <= 0 { |
| 71 | size = 1 |
| 72 | } |
| 73 | name = name[:len(name)-size] |
| 74 | } |
| 75 | name = strings.TrimRight(name, ". ") |
| 76 | if name == "" { |
| 77 | return "", ErrReleaseAssetInvalid |
| 78 | } |
| 79 | return name, nil |
| 80 | } |
| 81 | |
| 82 | // SaveReleaseAsset stores an uploaded file on disk and records it in the database. |
| 83 | func (s *Service) SaveReleaseAsset(ctx context.Context, r *Repository, releaseID, uploaderID int64, filename string, data []byte, contentType string) (*ReleaseAsset, error) { |
| 84 | display, err := sanitizeAssetFilename(filename) |
| 85 | if err != nil { |
| 86 | return nil, err |
| 87 | } |
| 88 | |
| 89 | dir, err := s.ReleaseAssetsDir(r.OwnerUsername, r.Name, releaseID) |
| 90 | if err != nil { |
| 91 | return nil, err |
| 92 | } |
| 93 | if err := os.MkdirAll(dir, 0o755); err != nil { |
| 94 | return nil, fmt.Errorf("create release assets dir: %w", err) |
| 95 | } |
| 96 | |
| 97 | var token [8]byte |
| 98 | if _, err := rand.Read(token[:]); err != nil { |
| 99 | return nil, fmt.Errorf("generate asset token: %w", err) |
| 100 | } |
| 101 | stored := hex.EncodeToString(token[:]) + "_" + display |
| 102 | full := filepath.Join(dir, stored) |
| 103 | if err := os.WriteFile(full, data, 0o644); err != nil { |
| 104 | return nil, fmt.Errorf("write release asset: %w", err) |
| 105 | } |
| 106 | |
| 107 | contentType = strings.TrimSpace(contentType) |
| 108 | if contentType == "" || len(contentType) > 120 { |
| 109 | contentType = "application/octet-stream" |
| 110 | } |
| 111 | |
| 112 | now := time.Now().UTC() |
| 113 | cctx, cancel := context.WithTimeout(ctx, 5*time.Second) |
| 114 | defer cancel() |
| 115 | res, err := s.db.ExecContext(cctx, ` |
| 116 | INSERT INTO release_assets (release_id, uploader_id, filename, stored_name, size, content_type, created_at) |
| 117 | VALUES (?, ?, ?, ?, ?, ?, ?) |
| 118 | `, releaseID, uploaderID, display, stored, len(data), contentType, now) |
| 119 | if err != nil { |
| 120 | _ = os.Remove(full) |
| 121 | return nil, fmt.Errorf("insert release asset: %w", err) |
| 122 | } |
| 123 | id, _ := res.LastInsertId() |
| 124 | |
| 125 | return &ReleaseAsset{ |
| 126 | ID: id, |
| 127 | ReleaseID: releaseID, |
| 128 | UploaderID: uploaderID, |
| 129 | Filename: display, |
| 130 | StoredName: stored, |
| 131 | Size: int64(len(data)), |
| 132 | ContentType: contentType, |
| 133 | CreatedAt: now, |
| 134 | }, nil |
| 135 | } |
| 136 | |
| 137 | func (s *Service) GetReleaseAsset(ctx context.Context, assetID int64) (*ReleaseAsset, error) { |
| 138 | cctx, cancel := context.WithTimeout(ctx, 3*time.Second) |
| 139 | defer cancel() |
| 140 | |
| 141 | var a ReleaseAsset |
| 142 | err := s.db.QueryRowContext(cctx, ` |
| 143 | SELECT id, release_id, uploader_id, filename, stored_name, size, content_type, download_count, created_at |
| 144 | FROM release_assets |
| 145 | WHERE id = ? |
| 146 | `, assetID).Scan( |
| 147 | &a.ID, &a.ReleaseID, &a.UploaderID, &a.Filename, &a.StoredName, |
| 148 | &a.Size, &a.ContentType, &a.DownloadCount, &a.CreatedAt, |
| 149 | ) |
| 150 | if err != nil { |
| 151 | if errors.Is(err, sql.ErrNoRows) { |
| 152 | return nil, ErrReleaseAssetNotFound |
| 153 | } |
| 154 | return nil, fmt.Errorf("get release asset: %w", err) |
| 155 | } |
| 156 | return &a, nil |
| 157 | } |
| 158 | |
| 159 | // ListReleaseAssetsByRepo returns uploaded assets for every release of a repo, |
| 160 | // keyed by release id. One query for the whole releases page. |
| 161 | func (s *Service) ListReleaseAssetsByRepo(ctx context.Context, repoID int64) (map[int64][]ReleaseAsset, error) { |
| 162 | cctx, cancel := context.WithTimeout(ctx, 5*time.Second) |
| 163 | defer cancel() |
| 164 | |
| 165 | rows, err := s.db.QueryContext(cctx, ` |
| 166 | SELECT a.id, a.release_id, a.uploader_id, a.filename, a.stored_name, a.size, |
| 167 | a.content_type, a.download_count, a.created_at |
| 168 | FROM release_assets a |
| 169 | JOIN releases r ON r.id = a.release_id |
| 170 | WHERE r.repo_id = ? |
| 171 | ORDER BY a.created_at ASC, a.id ASC |
| 172 | `, repoID) |
| 173 | if err != nil { |
| 174 | return nil, fmt.Errorf("list release assets: %w", err) |
| 175 | } |
| 176 | defer rows.Close() |
| 177 | |
| 178 | result := map[int64][]ReleaseAsset{} |
| 179 | for rows.Next() { |
| 180 | var a ReleaseAsset |
| 181 | if err := rows.Scan( |
| 182 | &a.ID, &a.ReleaseID, &a.UploaderID, &a.Filename, &a.StoredName, |
| 183 | &a.Size, &a.ContentType, &a.DownloadCount, &a.CreatedAt, |
| 184 | ); err != nil { |
| 185 | return nil, fmt.Errorf("scan release asset: %w", err) |
| 186 | } |
| 187 | result[a.ReleaseID] = append(result[a.ReleaseID], a) |
| 188 | } |
| 189 | return result, rows.Err() |
| 190 | } |
| 191 | |
| 192 | // DeleteReleaseAsset removes the database row and the file on disk. |
| 193 | func (s *Service) DeleteReleaseAsset(ctx context.Context, r *Repository, asset *ReleaseAsset) error { |
| 194 | cctx, cancel := context.WithTimeout(ctx, 3*time.Second) |
| 195 | defer cancel() |
| 196 | |
| 197 | if _, err := s.db.ExecContext(cctx, `DELETE FROM release_assets WHERE id = ?`, asset.ID); err != nil { |
| 198 | return fmt.Errorf("delete release asset: %w", err) |
| 199 | } |
| 200 | if dir, err := s.ReleaseAssetsDir(r.OwnerUsername, r.Name, asset.ReleaseID); err == nil { |
| 201 | _ = os.Remove(filepath.Join(dir, asset.StoredName)) |
| 202 | } |
| 203 | return nil |
| 204 | } |
| 205 | |
| 206 | // RemoveReleaseAssets drops every uploaded file belonging to a release. |
| 207 | // Database rows are removed by the ON DELETE CASCADE constraint. |
| 208 | func (s *Service) RemoveReleaseAssets(r *Repository, releaseID int64) { |
| 209 | dir, err := s.ReleaseAssetsDir(r.OwnerUsername, r.Name, releaseID) |
| 210 | if err != nil { |
| 211 | return |
| 212 | } |
| 213 | _ = os.RemoveAll(dir) |
| 214 | } |
| 215 | |
| 216 | // IncrementReleaseAssetDownloads bumps the download counter (best effort). |
| 217 | func (s *Service) IncrementReleaseAssetDownloads(ctx context.Context, assetID int64) { |
| 218 | cctx, cancel := context.WithTimeout(ctx, 3*time.Second) |
| 219 | defer cancel() |
| 220 | _, _ = s.db.ExecContext(cctx, `UPDATE release_assets SET download_count = download_count + 1 WHERE id = ?`, assetID) |
| 221 | } |
| 222 |