service: define request X-headers interface

This commit is contained in:
Leonard Lyubich 2020-06-18 14:35:14 +03:00
parent 73e90be443
commit 705582dbc7
2 changed files with 69 additions and 0 deletions

View file

@ -1,5 +1,13 @@
package service
import (
"io"
)
type extHdrSrcWrapper struct {
extHdrSrc ExtendedHeadersSource
}
// CutMeta returns current value and sets RequestMetaHeader to empty value.
func (m *RequestMetaHeader) CutMeta() RequestMetaHeader {
cp := *m
@ -11,3 +19,53 @@ func (m *RequestMetaHeader) CutMeta() RequestMetaHeader {
func (m *RequestMetaHeader) RestoreMeta(v RequestMetaHeader) {
*m = v
}
// ExtendedHeadersSignedData wraps passed ExtendedHeadersSource and returns SignedDataSource.
func ExtendedHeadersSignedData(headers ExtendedHeadersSource) SignedDataSource {
return &extHdrSrcWrapper{
extHdrSrc: headers,
}
}
// SignedData returns extended headers in a binary representation.
func (s extHdrSrcWrapper) SignedData() ([]byte, error) {
return SignedDataFromReader(s)
}
// SignedDataSize returns the length of extended headers slice.
func (s extHdrSrcWrapper) SignedDataSize() (res int) {
if s.extHdrSrc != nil {
for _, h := range s.extHdrSrc.ExtendedHeaders() {
if h != nil {
res += len(h.Key()) + len(h.Value())
}
}
}
return
}
// ReadSignedData copies a binary representation of the extended headers to passed buffer.
//
// If buffer length is less than required, io.ErrUnexpectedEOF returns.
func (s extHdrSrcWrapper) ReadSignedData(p []byte) (int, error) {
sz := s.SignedDataSize()
if len(p) < sz {
return 0, io.ErrUnexpectedEOF
}
if s.extHdrSrc != nil {
off := 0
for _, h := range s.extHdrSrc.ExtendedHeaders() {
if h == nil {
continue
}
off += copy(p[off:], []byte(h.Key()))
off += copy(p[off:], []byte(h.Value()))
}
}
return sz, nil
}

View file

@ -301,3 +301,14 @@ type BearerToken interface {
type BearerTokenSource interface {
GetBearerToken() BearerToken
}
// ExtendedHeader is an interface of string key-value pair with read access.
type ExtendedHeader interface {
Key() string
Value() string
}
// ExtendedHeadersSource is an interface of ExtendedHeader list with read access.
type ExtendedHeadersSource interface {
ExtendedHeaders() []ExtendedHeader
}