| 1 | package installer |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/sha256" |
| 6 | "encoding/hex" |
| 7 | "fmt" |
| 8 | "io" |
| 9 | "net/http" |
| 10 | "net/url" |
| 11 | "os" |
| 12 | "path/filepath" |
| 13 | "runtime" |
| 14 | "strings" |
| 15 | "time" |
| 16 | |
| 17 | "golang.org/x/mod/semver" |
| 18 | |
| 19 | "github.com/gosuda/portal-tunnel/v2/types" |
| 20 | "github.com/gosuda/portal-tunnel/v2/utils" |
| 21 | ) |
| 22 | |
| 23 | const updateCheckInterval = 24 * time.Hour |
| 24 | |
| 25 | var updateCheckClient = utils.NewHTTPClient( |
| 26 | utils.WithHTTPTimeout(10*time.Second), |
| 27 | utils.WithHTTPCheckRedirect(func(req *http.Request, via []*http.Request) error { |
| 28 | return http.ErrUseLastResponse |
| 29 | }), |
| 30 | ) |
| 31 | |
| 32 | var updateDownloadClient = utils.NewHTTPClient(utils.WithHTTPTimeout(120 * time.Second)) |
| 33 | |
| 34 | func StartUpdateCheck(currentVersion string) { |
| 35 | binURL, _, ok := assetURLs("") |
| 36 | if !ok { |
| 37 | return |
| 38 | } |
| 39 | |
| 40 | go func() { |
| 41 | for { |
| 42 | req, err := http.NewRequestWithContext(context.Background(), http.MethodHead, binURL, nil) |
| 43 | if err == nil { |
| 44 | resp, err := updateCheckClient.Do(req) |
| 45 | if err == nil { |
| 46 | location := resp.Header.Get("Location") |
| 47 | _ = resp.Body.Close() |
| 48 | |
| 49 | if parsed, err := url.Parse(location); err == nil { |
| 50 | segments := strings.Split(strings.TrimPrefix(parsed.Path, "/"), "/") |
| 51 | if len(segments) >= 5 { |
| 52 | version := segments[4] |
| 53 | current := strings.TrimSpace(currentVersion) |
| 54 | if current != "" && !strings.HasPrefix(current, "v") { |
| 55 | current = "v" + current |
| 56 | } |
| 57 | latestValid := strings.HasPrefix(version, "v") && semver.IsValid(version) |
| 58 | if latestValid && semver.IsValid(current) && semver.Compare(version, current) > 0 { |
| 59 | fmt.Fprintf(os.Stderr, "\nA new version is available: %s. Run 'portal update' to upgrade.\n", version) |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | time.Sleep(updateCheckInterval) |
| 67 | } |
| 68 | }() |
| 69 | } |
| 70 | |
| 71 | func UpdateCurrentBinary(version string) error { |
| 72 | binURL, checksumURL, ok := assetURLs(version) |
| 73 | if !ok { |
| 74 | return fmt.Errorf("unsupported platform: %s/%s", runtime.GOOS, runtime.GOARCH) |
| 75 | } |
| 76 | |
| 77 | execPath, err := os.Executable() |
| 78 | if err != nil { |
| 79 | return fmt.Errorf("failed to determine executable path: %w", err) |
| 80 | } |
| 81 | execPath, err = filepath.EvalSymlinks(execPath) |
| 82 | if err != nil { |
| 83 | return fmt.Errorf("failed to resolve executable path: %w", err) |
| 84 | } |
| 85 | |
| 86 | tmpFile, err := os.CreateTemp("", "portal-update-*") |
| 87 | if err != nil { |
| 88 | return fmt.Errorf("failed to create temp file: %w", err) |
| 89 | } |
| 90 | defer func() { _ = os.Remove(tmpFile.Name()) }() |
| 91 | |
| 92 | req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, binURL, nil) |
| 93 | if err != nil { |
| 94 | _ = tmpFile.Close() |
| 95 | return fmt.Errorf("failed to build binary request: %w", err) |
| 96 | } |
| 97 | resp, err := updateDownloadClient.Do(req) |
| 98 | if err != nil { |
| 99 | _ = tmpFile.Close() |
| 100 | return fmt.Errorf("failed to download binary: %w", err) |
| 101 | } |
| 102 | if resp.StatusCode != http.StatusOK { |
| 103 | _ = resp.Body.Close() |
| 104 | _ = tmpFile.Close() |
| 105 | return fmt.Errorf("failed to download binary: unexpected status %d", resp.StatusCode) |
| 106 | } |
| 107 | if _, err := io.Copy(tmpFile, resp.Body); err != nil { |
| 108 | _ = resp.Body.Close() |
| 109 | _ = tmpFile.Close() |
| 110 | return fmt.Errorf("failed to download binary: %w", err) |
| 111 | } |
| 112 | _ = resp.Body.Close() |
| 113 | |
| 114 | if err := tmpFile.Sync(); err != nil { |
| 115 | _ = tmpFile.Close() |
| 116 | return fmt.Errorf("failed to sync downloaded binary: %w", err) |
| 117 | } |
| 118 | if err := tmpFile.Close(); err != nil { |
| 119 | return fmt.Errorf("failed to close downloaded binary: %w", err) |
| 120 | } |
| 121 | |
| 122 | req, err = http.NewRequestWithContext(context.Background(), http.MethodGet, checksumURL, nil) |
| 123 | if err != nil { |
| 124 | return fmt.Errorf("failed to build checksum request: %w", err) |
| 125 | } |
| 126 | resp, err = updateDownloadClient.Do(req) |
| 127 | if err != nil { |
| 128 | return fmt.Errorf("failed to download checksum: %w", err) |
| 129 | } |
| 130 | defer func() { _ = resp.Body.Close() }() |
| 131 | |
| 132 | if resp.StatusCode != http.StatusOK { |
| 133 | return fmt.Errorf("checksum download returned status %d", resp.StatusCode) |
| 134 | } |
| 135 | body, err := io.ReadAll(resp.Body) |
| 136 | if err != nil { |
| 137 | return fmt.Errorf("failed to read checksum response: %w", err) |
| 138 | } |
| 139 | |
| 140 | fields := strings.Fields(strings.TrimSpace(string(body))) |
| 141 | if len(fields) == 0 { |
| 142 | return fmt.Errorf("empty checksum response") |
| 143 | } |
| 144 | expectedHash := strings.ToLower(fields[0]) |
| 145 | if len(expectedHash) != 64 { |
| 146 | return fmt.Errorf("invalid checksum format (expected 64 hex chars, got %d)", len(expectedHash)) |
| 147 | } |
| 148 | |
| 149 | f, err := os.Open(tmpFile.Name()) |
| 150 | if err != nil { |
| 151 | return fmt.Errorf("failed to open downloaded file: %w", err) |
| 152 | } |
| 153 | defer func() { _ = f.Close() }() |
| 154 | |
| 155 | h := sha256.New() |
| 156 | if _, err := io.Copy(h, f); err != nil { |
| 157 | return fmt.Errorf("failed to compute hash: %w", err) |
| 158 | } |
| 159 | |
| 160 | actualHash := hex.EncodeToString(h.Sum(nil)) |
| 161 | if actualHash != expectedHash { |
| 162 | return fmt.Errorf("hash mismatch: expected %s, got %s", expectedHash, actualHash) |
| 163 | } |
| 164 | |
| 165 | if err := replaceBinary(tmpFile.Name(), execPath); err != nil { |
| 166 | return fmt.Errorf("failed to replace binary: %w", err) |
| 167 | } |
| 168 | |
| 169 | return nil |
| 170 | } |
| 171 | |
| 172 | func assetURLs(version string) (binURL, checksumURL string, ok bool) { |
| 173 | slug := runtime.GOOS + "-" + runtime.GOARCH |
| 174 | filename, ok := AssetFilename(slug) |
| 175 | if !ok { |
| 176 | return "", "", false |
| 177 | } |
| 178 | |
| 179 | baseURL := types.OfficialReleaseBaseURL + "/latest/download" |
| 180 | version = strings.TrimSpace(version) |
| 181 | if version != "" { |
| 182 | if !strings.HasPrefix(version, "v") { |
| 183 | version = "v" + version |
| 184 | } |
| 185 | baseURL = types.OfficialReleaseBaseURL + "/download/" + version |
| 186 | } |
| 187 | |
| 188 | binURL = baseURL + "/" + filename |
| 189 | return binURL, binURL + ".sha256", true |
| 190 | } |
| 191 | |
| 192 | func replaceBinary(srcPath, dstPath string) error { |
| 193 | if runtime.GOOS == "windows" { |
| 194 | return replaceBinaryWindows(srcPath, dstPath) |
| 195 | } |
| 196 | return replaceBinaryUnix(srcPath, dstPath) |
| 197 | } |
| 198 | |
| 199 | func replaceBinaryUnix(srcPath, dstPath string) error { |
| 200 | if err := os.Chmod(srcPath, 0755); err != nil { |
| 201 | return fmt.Errorf("failed to set permissions: %w", err) |
| 202 | } |
| 203 | |
| 204 | if err := os.Rename(srcPath, dstPath); err == nil { |
| 205 | return nil |
| 206 | } |
| 207 | |
| 208 | src, err := os.Open(srcPath) |
| 209 | if err != nil { |
| 210 | return err |
| 211 | } |
| 212 | defer func() { _ = src.Close() }() |
| 213 | |
| 214 | dstDir := filepath.Dir(dstPath) |
| 215 | tmp, err := os.CreateTemp(dstDir, "."+filepath.Base(dstPath)+".update-*") |
| 216 | if err != nil { |
| 217 | return fmt.Errorf("failed to create replacement file: %w", err) |
| 218 | } |
| 219 | tmpPath := tmp.Name() |
| 220 | defer func() { _ = os.Remove(tmpPath) }() |
| 221 | |
| 222 | if _, err := io.Copy(tmp, src); err != nil { |
| 223 | _ = tmp.Close() |
| 224 | return fmt.Errorf("failed to copy binary: %w", err) |
| 225 | } |
| 226 | if err := tmp.Chmod(0755); err != nil { |
| 227 | _ = tmp.Close() |
| 228 | return fmt.Errorf("failed to set replacement permissions: %w", err) |
| 229 | } |
| 230 | if err := tmp.Sync(); err != nil { |
| 231 | _ = tmp.Close() |
| 232 | return fmt.Errorf("failed to sync replacement binary: %w", err) |
| 233 | } |
| 234 | if err := tmp.Close(); err != nil { |
| 235 | return fmt.Errorf("failed to close replacement binary: %w", err) |
| 236 | } |
| 237 | if err := os.Rename(tmpPath, dstPath); err != nil { |
| 238 | return fmt.Errorf("failed to replace destination: %w", err) |
| 239 | } |
| 240 | tmpPath = "" |
| 241 | return nil |
| 242 | } |
| 243 | |
| 244 | func replaceBinaryWindows(srcPath, dstPath string) error { |
| 245 | oldPath := dstPath + ".old" |
| 246 | |
| 247 | _ = os.Remove(oldPath) |
| 248 | |
| 249 | if err := os.Rename(dstPath, oldPath); err != nil { |
| 250 | return fmt.Errorf("failed to rename old binary: %w", err) |
| 251 | } |
| 252 | |
| 253 | if err := os.Rename(srcPath, dstPath); err != nil { |
| 254 | _ = os.Rename(oldPath, dstPath) |
| 255 | return fmt.Errorf("failed to place new binary: %w", err) |
| 256 | } |
| 257 | |
| 258 | _ = os.Remove(oldPath) |
| 259 | return nil |
| 260 | } |