diff options
Diffstat (limited to 'vendor/github.com/aws/aws-sdk-go/private/protocol/host.go')
-rw-r--r-- | vendor/github.com/aws/aws-sdk-go/private/protocol/host.go | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/github.com/aws/aws-sdk-go/private/protocol/host.go b/vendor/github.com/aws/aws-sdk-go/private/protocol/host.go new file mode 100644 index 0000000000..d7d42db0a6 --- /dev/null +++ b/vendor/github.com/aws/aws-sdk-go/private/protocol/host.go @@ -0,0 +1,68 @@ +package protocol + +import ( + "strings" + + "github.com/aws/aws-sdk-go/aws/request" +) + +// ValidateEndpointHostHandler is a request handler that will validate the +// request endpoint's hosts is a valid RFC 3986 host. +var ValidateEndpointHostHandler = request.NamedHandler{ + Name: "awssdk.protocol.ValidateEndpointHostHandler", + Fn: func(r *request.Request) { + err := ValidateEndpointHost(r.Operation.Name, r.HTTPRequest.URL.Host) + if err != nil { + r.Error = err + } + }, +} + +// ValidateEndpointHost validates that the host string passed in is a valid RFC +// 3986 host. Returns error if the host is not valid. +func ValidateEndpointHost(opName, host string) error { + paramErrs := request.ErrInvalidParams{Context: opName} + labels := strings.Split(host, ".") + + for i, label := range labels { + if i == len(labels)-1 && len(label) == 0 { + // Allow trailing dot for FQDN hosts. + continue + } + + if !ValidHostLabel(label) { + paramErrs.Add(request.NewErrParamFormat( + "endpoint host label", "[a-zA-Z0-9-]{1,63}", label)) + } + } + + if len(host) > 255 { + paramErrs.Add(request.NewErrParamMaxLen( + "endpoint host", 255, host, + )) + } + + if paramErrs.Len() > 0 { + return paramErrs + } + return nil +} + +// ValidHostLabel returns if the label is a valid RFC 3986 host label. +func ValidHostLabel(label string) bool { + if l := len(label); l == 0 || l > 63 { + return false + } + for _, r := range label { + switch { + case r >= '0' && r <= '9': + case r >= 'A' && r <= 'Z': + case r >= 'a' && r <= 'z': + case r == '-': + default: + return false + } + } + + return true +} |