mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-15 02:40:23 +00:00
5a66991bb3
updating the kubernetes release to the latest in main go.mod Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
407 lines
11 KiB
Go
407 lines
11 KiB
Go
package runtime
|
|
|
|
import (
|
|
"context"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"net/textproto"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"google.golang.org/grpc/codes"
|
|
"google.golang.org/grpc/grpclog"
|
|
"google.golang.org/grpc/metadata"
|
|
"google.golang.org/grpc/status"
|
|
)
|
|
|
|
// MetadataHeaderPrefix is the http prefix that represents custom metadata
|
|
// parameters to or from a gRPC call.
|
|
const MetadataHeaderPrefix = "Grpc-Metadata-"
|
|
|
|
// MetadataPrefix is prepended to permanent HTTP header keys (as specified
|
|
// by the IANA) when added to the gRPC context.
|
|
const MetadataPrefix = "grpcgateway-"
|
|
|
|
// MetadataTrailerPrefix is prepended to gRPC metadata as it is converted to
|
|
// HTTP headers in a response handled by grpc-gateway
|
|
const MetadataTrailerPrefix = "Grpc-Trailer-"
|
|
|
|
const metadataGrpcTimeout = "Grpc-Timeout"
|
|
const metadataHeaderBinarySuffix = "-Bin"
|
|
|
|
const xForwardedFor = "X-Forwarded-For"
|
|
const xForwardedHost = "X-Forwarded-Host"
|
|
|
|
// DefaultContextTimeout is used for gRPC call context.WithTimeout whenever a Grpc-Timeout inbound
|
|
// header isn't present. If the value is 0 the sent `context` will not have a timeout.
|
|
var DefaultContextTimeout = 0 * time.Second
|
|
|
|
// malformedHTTPHeaders lists the headers that the gRPC server may reject outright as malformed.
|
|
// See https://github.com/grpc/grpc-go/pull/4803#issuecomment-986093310 for more context.
|
|
var malformedHTTPHeaders = map[string]struct{}{
|
|
"connection": {},
|
|
}
|
|
|
|
type (
|
|
rpcMethodKey struct{}
|
|
httpPathPatternKey struct{}
|
|
|
|
AnnotateContextOption func(ctx context.Context) context.Context
|
|
)
|
|
|
|
func WithHTTPPathPattern(pattern string) AnnotateContextOption {
|
|
return func(ctx context.Context) context.Context {
|
|
return withHTTPPathPattern(ctx, pattern)
|
|
}
|
|
}
|
|
|
|
func decodeBinHeader(v string) ([]byte, error) {
|
|
if len(v)%4 == 0 {
|
|
// Input was padded, or padding was not necessary.
|
|
return base64.StdEncoding.DecodeString(v)
|
|
}
|
|
return base64.RawStdEncoding.DecodeString(v)
|
|
}
|
|
|
|
/*
|
|
AnnotateContext adds context information such as metadata from the request.
|
|
|
|
At a minimum, the RemoteAddr is included in the fashion of "X-Forwarded-For",
|
|
except that the forwarded destination is not another HTTP service but rather
|
|
a gRPC service.
|
|
*/
|
|
func AnnotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, error) {
|
|
ctx, md, err := annotateContext(ctx, mux, req, rpcMethodName, options...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if md == nil {
|
|
return ctx, nil
|
|
}
|
|
|
|
return metadata.NewOutgoingContext(ctx, md), nil
|
|
}
|
|
|
|
// AnnotateIncomingContext adds context information such as metadata from the request.
|
|
// Attach metadata as incoming context.
|
|
func AnnotateIncomingContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, error) {
|
|
ctx, md, err := annotateContext(ctx, mux, req, rpcMethodName, options...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if md == nil {
|
|
return ctx, nil
|
|
}
|
|
|
|
return metadata.NewIncomingContext(ctx, md), nil
|
|
}
|
|
|
|
func isValidGRPCMetadataKey(key string) bool {
|
|
// Must be a valid gRPC "Header-Name" as defined here:
|
|
// https://github.com/grpc/grpc/blob/4b05dc88b724214d0c725c8e7442cbc7a61b1374/doc/PROTOCOL-HTTP2.md
|
|
// This means 0-9 a-z _ - .
|
|
// Only lowercase letters are valid in the wire protocol, but the client library will normalize
|
|
// uppercase ASCII to lowercase, so uppercase ASCII is also acceptable.
|
|
bytes := []byte(key) // gRPC validates strings on the byte level, not Unicode.
|
|
for _, ch := range bytes {
|
|
validLowercaseLetter := ch >= 'a' && ch <= 'z'
|
|
validUppercaseLetter := ch >= 'A' && ch <= 'Z'
|
|
validDigit := ch >= '0' && ch <= '9'
|
|
validOther := ch == '.' || ch == '-' || ch == '_'
|
|
if !validLowercaseLetter && !validUppercaseLetter && !validDigit && !validOther {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func isValidGRPCMetadataTextValue(textValue string) bool {
|
|
// Must be a valid gRPC "ASCII-Value" as defined here:
|
|
// https://github.com/grpc/grpc/blob/4b05dc88b724214d0c725c8e7442cbc7a61b1374/doc/PROTOCOL-HTTP2.md
|
|
// This means printable ASCII (including/plus spaces); 0x20 to 0x7E inclusive.
|
|
bytes := []byte(textValue) // gRPC validates strings on the byte level, not Unicode.
|
|
for _, ch := range bytes {
|
|
if ch < 0x20 || ch > 0x7E {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func annotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcMethodName string, options ...AnnotateContextOption) (context.Context, metadata.MD, error) {
|
|
ctx = withRPCMethod(ctx, rpcMethodName)
|
|
for _, o := range options {
|
|
ctx = o(ctx)
|
|
}
|
|
timeout := DefaultContextTimeout
|
|
if tm := req.Header.Get(metadataGrpcTimeout); tm != "" {
|
|
var err error
|
|
timeout, err = timeoutDecode(tm)
|
|
if err != nil {
|
|
return nil, nil, status.Errorf(codes.InvalidArgument, "invalid grpc-timeout: %s", tm)
|
|
}
|
|
}
|
|
var pairs []string
|
|
for key, vals := range req.Header {
|
|
key = textproto.CanonicalMIMEHeaderKey(key)
|
|
switch key {
|
|
case xForwardedFor, xForwardedHost:
|
|
// Handled separately below
|
|
continue
|
|
}
|
|
|
|
for _, val := range vals {
|
|
// For backwards-compatibility, pass through 'authorization' header with no prefix.
|
|
if key == "Authorization" {
|
|
pairs = append(pairs, "authorization", val)
|
|
}
|
|
if h, ok := mux.incomingHeaderMatcher(key); ok {
|
|
if !isValidGRPCMetadataKey(h) {
|
|
grpclog.Errorf("HTTP header name %q is not valid as gRPC metadata key; skipping", h)
|
|
continue
|
|
}
|
|
// Handles "-bin" metadata in grpc, since grpc will do another base64
|
|
// encode before sending to server, we need to decode it first.
|
|
if strings.HasSuffix(key, metadataHeaderBinarySuffix) {
|
|
b, err := decodeBinHeader(val)
|
|
if err != nil {
|
|
return nil, nil, status.Errorf(codes.InvalidArgument, "invalid binary header %s: %s", key, err)
|
|
}
|
|
|
|
val = string(b)
|
|
} else if !isValidGRPCMetadataTextValue(val) {
|
|
grpclog.Errorf("Value of HTTP header %q contains non-ASCII value (not valid as gRPC metadata): skipping", h)
|
|
continue
|
|
}
|
|
pairs = append(pairs, h, val)
|
|
}
|
|
}
|
|
}
|
|
if host := req.Header.Get(xForwardedHost); host != "" {
|
|
pairs = append(pairs, strings.ToLower(xForwardedHost), host)
|
|
} else if req.Host != "" {
|
|
pairs = append(pairs, strings.ToLower(xForwardedHost), req.Host)
|
|
}
|
|
|
|
xff := req.Header.Values(xForwardedFor)
|
|
if addr := req.RemoteAddr; addr != "" {
|
|
if remoteIP, _, err := net.SplitHostPort(addr); err == nil {
|
|
xff = append(xff, remoteIP)
|
|
}
|
|
}
|
|
if len(xff) > 0 {
|
|
pairs = append(pairs, strings.ToLower(xForwardedFor), strings.Join(xff, ", "))
|
|
}
|
|
|
|
if timeout != 0 {
|
|
ctx, _ = context.WithTimeout(ctx, timeout)
|
|
}
|
|
if len(pairs) == 0 {
|
|
return ctx, nil, nil
|
|
}
|
|
md := metadata.Pairs(pairs...)
|
|
for _, mda := range mux.metadataAnnotators {
|
|
md = metadata.Join(md, mda(ctx, req))
|
|
}
|
|
return ctx, md, nil
|
|
}
|
|
|
|
// ServerMetadata consists of metadata sent from gRPC server.
|
|
type ServerMetadata struct {
|
|
HeaderMD metadata.MD
|
|
TrailerMD metadata.MD
|
|
}
|
|
|
|
type serverMetadataKey struct{}
|
|
|
|
// NewServerMetadataContext creates a new context with ServerMetadata
|
|
func NewServerMetadataContext(ctx context.Context, md ServerMetadata) context.Context {
|
|
if ctx == nil {
|
|
ctx = context.Background()
|
|
}
|
|
return context.WithValue(ctx, serverMetadataKey{}, md)
|
|
}
|
|
|
|
// ServerMetadataFromContext returns the ServerMetadata in ctx
|
|
func ServerMetadataFromContext(ctx context.Context) (md ServerMetadata, ok bool) {
|
|
if ctx == nil {
|
|
return md, false
|
|
}
|
|
md, ok = ctx.Value(serverMetadataKey{}).(ServerMetadata)
|
|
return
|
|
}
|
|
|
|
// ServerTransportStream implements grpc.ServerTransportStream.
|
|
// It should only be used by the generated files to support grpc.SendHeader
|
|
// outside of gRPC server use.
|
|
type ServerTransportStream struct {
|
|
mu sync.Mutex
|
|
header metadata.MD
|
|
trailer metadata.MD
|
|
}
|
|
|
|
// Method returns the method for the stream.
|
|
func (s *ServerTransportStream) Method() string {
|
|
return ""
|
|
}
|
|
|
|
// Header returns the header metadata of the stream.
|
|
func (s *ServerTransportStream) Header() metadata.MD {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
return s.header.Copy()
|
|
}
|
|
|
|
// SetHeader sets the header metadata.
|
|
func (s *ServerTransportStream) SetHeader(md metadata.MD) error {
|
|
if md.Len() == 0 {
|
|
return nil
|
|
}
|
|
|
|
s.mu.Lock()
|
|
s.header = metadata.Join(s.header, md)
|
|
s.mu.Unlock()
|
|
return nil
|
|
}
|
|
|
|
// SendHeader sets the header metadata.
|
|
func (s *ServerTransportStream) SendHeader(md metadata.MD) error {
|
|
return s.SetHeader(md)
|
|
}
|
|
|
|
// Trailer returns the cached trailer metadata.
|
|
func (s *ServerTransportStream) Trailer() metadata.MD {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
return s.trailer.Copy()
|
|
}
|
|
|
|
// SetTrailer sets the trailer metadata.
|
|
func (s *ServerTransportStream) SetTrailer(md metadata.MD) error {
|
|
if md.Len() == 0 {
|
|
return nil
|
|
}
|
|
|
|
s.mu.Lock()
|
|
s.trailer = metadata.Join(s.trailer, md)
|
|
s.mu.Unlock()
|
|
return nil
|
|
}
|
|
|
|
func timeoutDecode(s string) (time.Duration, error) {
|
|
size := len(s)
|
|
if size < 2 {
|
|
return 0, fmt.Errorf("timeout string is too short: %q", s)
|
|
}
|
|
d, ok := timeoutUnitToDuration(s[size-1])
|
|
if !ok {
|
|
return 0, fmt.Errorf("timeout unit is not recognized: %q", s)
|
|
}
|
|
t, err := strconv.ParseInt(s[:size-1], 10, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return d * time.Duration(t), nil
|
|
}
|
|
|
|
func timeoutUnitToDuration(u uint8) (d time.Duration, ok bool) {
|
|
switch u {
|
|
case 'H':
|
|
return time.Hour, true
|
|
case 'M':
|
|
return time.Minute, true
|
|
case 'S':
|
|
return time.Second, true
|
|
case 'm':
|
|
return time.Millisecond, true
|
|
case 'u':
|
|
return time.Microsecond, true
|
|
case 'n':
|
|
return time.Nanosecond, true
|
|
default:
|
|
return
|
|
}
|
|
}
|
|
|
|
// isPermanentHTTPHeader checks whether hdr belongs to the list of
|
|
// permanent request headers maintained by IANA.
|
|
// http://www.iana.org/assignments/message-headers/message-headers.xml
|
|
func isPermanentHTTPHeader(hdr string) bool {
|
|
switch hdr {
|
|
case
|
|
"Accept",
|
|
"Accept-Charset",
|
|
"Accept-Language",
|
|
"Accept-Ranges",
|
|
"Authorization",
|
|
"Cache-Control",
|
|
"Content-Type",
|
|
"Cookie",
|
|
"Date",
|
|
"Expect",
|
|
"From",
|
|
"Host",
|
|
"If-Match",
|
|
"If-Modified-Since",
|
|
"If-None-Match",
|
|
"If-Schedule-Tag-Match",
|
|
"If-Unmodified-Since",
|
|
"Max-Forwards",
|
|
"Origin",
|
|
"Pragma",
|
|
"Referer",
|
|
"User-Agent",
|
|
"Via",
|
|
"Warning":
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// isMalformedHTTPHeader checks whether header belongs to the list of
|
|
// "malformed headers" and would be rejected by the gRPC server.
|
|
func isMalformedHTTPHeader(header string) bool {
|
|
_, isMalformed := malformedHTTPHeaders[strings.ToLower(header)]
|
|
return isMalformed
|
|
}
|
|
|
|
// RPCMethod returns the method string for the server context. The returned
|
|
// string is in the format of "/package.service/method".
|
|
func RPCMethod(ctx context.Context) (string, bool) {
|
|
m := ctx.Value(rpcMethodKey{})
|
|
if m == nil {
|
|
return "", false
|
|
}
|
|
ms, ok := m.(string)
|
|
if !ok {
|
|
return "", false
|
|
}
|
|
return ms, true
|
|
}
|
|
|
|
func withRPCMethod(ctx context.Context, rpcMethodName string) context.Context {
|
|
return context.WithValue(ctx, rpcMethodKey{}, rpcMethodName)
|
|
}
|
|
|
|
// HTTPPathPattern returns the HTTP path pattern string relating to the HTTP handler, if one exists.
|
|
// The format of the returned string is defined by the google.api.http path template type.
|
|
func HTTPPathPattern(ctx context.Context) (string, bool) {
|
|
m := ctx.Value(httpPathPatternKey{})
|
|
if m == nil {
|
|
return "", false
|
|
}
|
|
ms, ok := m.(string)
|
|
if !ok {
|
|
return "", false
|
|
}
|
|
return ms, true
|
|
}
|
|
|
|
func withHTTPPathPattern(ctx context.Context, httpPathPattern string) context.Context {
|
|
return context.WithValue(ctx, httpPathPatternKey{}, httpPathPattern)
|
|
}
|