| 1 | //go:build windows && !native_webview2loader |
| 2 | |
| 3 | package webviewloader |
| 4 | |
| 5 | import ( |
| 6 | "path/filepath" |
| 7 | |
| 8 | "golang.org/x/sys/windows/registry" |
| 9 | ) |
| 10 | |
| 11 | const ( |
| 12 | kNumChannels = 4 |
| 13 | kInstallKeyPath = "Software\\Microsoft\\EdgeUpdate\\ClientState\\" |
| 14 | kMinimumCompatibleVersion = "86.0.616.0" |
| 15 | ) |
| 16 | |
| 17 | var ( |
| 18 | kChannelName = [kNumChannels]string{ |
| 19 | "", "beta", "dev", "canary", // "internal" |
| 20 | } |
| 21 | |
| 22 | kChannelUuid = [kNumChannels]string{ |
| 23 | "{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}", |
| 24 | "{2CD8A007-E189-409D-A2C8-9AF4EF3C72AA}", |
| 25 | "{0D50BFEC-CD6A-4F9A-964C-C7416E3ACB10}", |
| 26 | "{65C35B14-6C1D-4122-AC46-7148CC9D6497}", |
| 27 | //"{BE59E8FD-089A-411B-A3B0-051D9E417818}", |
| 28 | } |
| 29 | |
| 30 | minimumCompatibleVersion, _ = parseVersion(kMinimumCompatibleVersion) |
| 31 | ) |
| 32 | |
| 33 | func findInstalledClientDll(preferCanary bool) (clientPath string, version *version, err error) { |
| 34 | for i := 0; i < kNumChannels; i++ { |
| 35 | channel := i |
| 36 | if preferCanary { |
| 37 | channel = (kNumChannels - 1) - i |
| 38 | } |
| 39 | |
| 40 | key := kInstallKeyPath + kChannelUuid[channel] |
| 41 | for _, checkSystem := range []bool{true, false} { |
| 42 | clientPath, version, err := findInstalledClientDllForChannel(key, checkSystem) |
| 43 | if err == errNoClientDLLFound { |
| 44 | continue |
| 45 | } |
| 46 | if err != nil { |
| 47 | return "", nil, err |
| 48 | } |
| 49 | |
| 50 | version.channel = kChannelName[channel] |
| 51 | return clientPath, version, nil |
| 52 | } |
| 53 | } |
| 54 | return "", nil, errNoClientDLLFound |
| 55 | } |
| 56 | |
| 57 | func findInstalledClientDllForChannel(subKey string, system bool) (clientPath string, clientVersion *version, err error) { |
| 58 | key := registry.LOCAL_MACHINE |
| 59 | if !system { |
| 60 | key = registry.CURRENT_USER |
| 61 | } |
| 62 | |
| 63 | regKey, err := registry.OpenKey(key, subKey, registry.READ|registry.WOW64_32KEY) |
| 64 | if err != nil { |
| 65 | return "", nil, mapFindErr(err) |
| 66 | } |
| 67 | defer regKey.Close() |
| 68 | |
| 69 | embeddedEdgeSubFolder, _, err := regKey.GetStringValue("EBWebView") |
| 70 | if err != nil { |
| 71 | return "", nil, mapFindErr(err) |
| 72 | } |
| 73 | |
| 74 | if embeddedEdgeSubFolder == "" { |
| 75 | return "", nil, errNoClientDLLFound |
| 76 | } |
| 77 | |
| 78 | versionString := filepath.Base(embeddedEdgeSubFolder) |
| 79 | version, err := parseVersion(versionString) |
| 80 | if err != nil { |
| 81 | return "", nil, errNoClientDLLFound |
| 82 | } |
| 83 | |
| 84 | if version.compare(minimumCompatibleVersion) < 0 { |
| 85 | return "", nil, errNoClientDLLFound |
| 86 | } |
| 87 | |
| 88 | dllPath, err := findEmbeddedClientDll(embeddedEdgeSubFolder) |
| 89 | if err != nil { |
| 90 | return "", nil, mapFindErr(err) |
| 91 | } |
| 92 | |
| 93 | return dllPath, &version, nil |
| 94 | } |
| 95 |