percent_encoding.h

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/*
 *
 * Copyright 2016 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 
#ifndef GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H
#define GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H
 
/* Percent encoding and decoding of slices.
   Transforms arbitrary strings into safe-for-transmission strings by using
   variants of percent encoding (RFC 3986).
   Two major variants are supplied: one that strictly matches URL encoding,
     and another which applies percent encoding only to non-http2 header
     bytes (the 'compatible' variant) */
 
#include <grpc/support/port_platform.h>
 
#include "src/core/lib/slice/slice.h"
 
namespace grpc_core {
 
enum class PercentEncodingType {
  // Flags [A-Za-z0-9-_.~] as unreserved bytes for the percent encoding routines
  URL,
  // Flags ascii7 non-control characters excluding '%' as unreserved bytes for
  // the percent encoding routines
  Compatible
};
 
// Percent-encode a slice, returning the new slice (this cannot fail):
// unreserved_bytes is a bitfield indicating which bytes are considered
// unreserved and thus do not need percent encoding
Slice PercentEncodeSlice(Slice slice, PercentEncodingType type);
// Percent-decode a slice, permissively.
// If a % triplet can not be decoded, pass it through verbatim.
// This cannot fail.
Slice PermissivePercentDecodeSlice(Slice slice_in);
 
}  // namespace grpc_core
 
#endif /* GRPC_CORE_LIB_SLICE_PERCENT_ENCODING_H */