Golang Key.GetStringValue方法代码示例

// readCredentialSpecRegistry is a helper function to read a credential spec from
// the registry. If not found, we return an empty string and warn in the log.
// This allows for staging on machines which do not have the necessary components.
func readCredentialSpecRegistry(id, name string) (string, error) {
	var (
		k   registry.Key
		err error
		val string
	)
	if k, err = registry.OpenKey(registry.LOCAL_MACHINE, credentialSpecRegistryLocation, registry.QUERY_VALUE); err != nil {
		return "", fmt.Errorf("failed handling spec %q for container %s - %s could not be opened", name, id, credentialSpecRegistryLocation)
	}
	if val, _, err = k.GetStringValue(name); err != nil {
		if err == registry.ErrNotExist {
			return "", fmt.Errorf("credential spec %q for container %s as it was not found", name, id)
		}
		return "", fmt.Errorf("error %v reading credential spec %q from registry for container %s", err, name, id)
	}
	return val, nil
}

func testValues(t *testing.T, k registry.Key) {
	for _, test := range ValueTests {
		switch test.Type {
		case registry.SZ, registry.EXPAND_SZ:
			if test.WillFail {
				_, _, err := k.GetStringValue(test.Name)
				testErrNotExist(t, test.Name, err)
			} else {
				testGetStringValue(t, k, test)
				_, gottype, err := k.GetIntegerValue(test.Name)
				testErrUnexpectedType(t, test, gottype, err)
				// Size of utf16 string in bytes is not perfect,
				// but correct for current test values.
				// Size also includes terminating 0.
				testGetValue(t, k, test, (len(test.Value.(string))+1)*2)
			}
			_, _, err := k.GetStringValue(test.Name + "_string_not_created")
			testErrNotExist(t, test.Name+"_string_not_created", err)
		case registry.DWORD, registry.QWORD:
			testGetIntegerValue(t, k, test)
			_, gottype, err := k.GetBinaryValue(test.Name)
			testErrUnexpectedType(t, test, gottype, err)
			_, _, err = k.GetIntegerValue(test.Name + "_int_not_created")
			testErrNotExist(t, test.Name+"_int_not_created", err)
			size := 8
			if test.Type == registry.DWORD {
				size = 4
			}
			testGetValue(t, k, test, size)
		case registry.BINARY:
			testGetBinaryValue(t, k, test)
			_, gottype, err := k.GetStringsValue(test.Name)
			testErrUnexpectedType(t, test, gottype, err)
			_, _, err = k.GetBinaryValue(test.Name + "_byte_not_created")
			testErrNotExist(t, test.Name+"_byte_not_created", err)
			testGetValue(t, k, test, len(test.Value.([]byte)))
		case registry.MULTI_SZ:
			if test.WillFail {
				_, _, err := k.GetStringsValue(test.Name)
				testErrNotExist(t, test.Name, err)
			} else {
				testGetStringsValue(t, k, test)
				_, gottype, err := k.GetStringValue(test.Name)
				testErrUnexpectedType(t, test, gottype, err)
				size := 0
				for _, s := range test.Value.([]string) {
					size += len(s) + 1 // nil terminated
				}
				size += 1 // extra nil at the end
				size *= 2 // count bytes, not uint16
				testGetValue(t, k, test, size)
			}
			_, _, err := k.GetStringsValue(test.Name + "_strings_not_created")
			testErrNotExist(t, test.Name+"_strings_not_created", err)
		default:
			t.Errorf("unsupported type %d for %s value", test.Type, test.Name)
			continue
		}
	}
}

func testGetStringValue(t *testing.T, k registry.Key, test ValueTest) {
	got, gottype, err := k.GetStringValue(test.Name)
	if err != nil {
		t.Errorf("GetStringValue(%s) failed: %v", test.Name, err)
		return
	}
	if got != test.Value {
		t.Errorf("want %s value %q, got %q", test.Name, test.Value, got)
		return
	}
	if gottype != test.Type {
		t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype)
		return
	}
	if gottype == registry.EXPAND_SZ {
		_, err = registry.ExpandString(got)
		if err != nil {
			t.Errorf("ExpandString(%s) failed: %v", got, err)
			return
		}
	}
}

func walkKey(t *testing.T, k registry.Key, kname string) {
	names, err := k.ReadValueNames(-1)
	if err != nil {
		t.Fatalf("reading value names of %s failed: %v", kname, err)
	}
	for _, name := range names {
		_, valtype, err := k.GetValue(name, nil)
		if err != nil {
			t.Fatalf("reading value type of %s of %s failed: %v", name, kname, err)
		}
		switch valtype {
		case registry.NONE:
		case registry.SZ:
			_, _, err := k.GetStringValue(name)
			if err != nil {
				t.Error(err)
			}
		case registry.EXPAND_SZ:
			s, _, err := k.GetStringValue(name)
			if err != nil {
				t.Error(err)
			}
			_, err = registry.ExpandString(s)
			if err != nil {
				t.Error(err)
			}
		case registry.DWORD, registry.QWORD:
			_, _, err := k.GetIntegerValue(name)
			if err != nil {
				t.Error(err)
			}
		case registry.BINARY:
			_, _, err := k.GetBinaryValue(name)
			if err != nil {
				t.Error(err)
			}
		case registry.MULTI_SZ:
			_, _, err := k.GetStringsValue(name)
			if err != nil {
				t.Error(err)
			}
		case registry.FULL_RESOURCE_DESCRIPTOR, registry.RESOURCE_LIST, registry.RESOURCE_REQUIREMENTS_LIST:
			// TODO: not implemented
		default:
			t.Fatalf("value type %d of %s of %s failed: %v", valtype, name, kname, err)
		}
	}

	names, err = k.ReadSubKeyNames(-1)
	if err != nil {
		t.Fatalf("reading sub-keys of %s failed: %v", kname, err)
	}
	for _, name := range names {
		func() {
			subk, err := registry.OpenKey(k, name, registry.ENUMERATE_SUB_KEYS|registry.QUERY_VALUE)
			if err != nil {
				if err == syscall.ERROR_ACCESS_DENIED {
					// ignore error, if we are not allowed to access this key
					return
				}
				t.Fatalf("opening sub-keys %s of %s failed: %v", name, kname, err)
			}
			defer subk.Close()

			walkKey(t, subk, kname+`\`+name)
		}()
	}
}