// Copyright 2021-2024 The Connect 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.
/**
 * Regular Expression that matches any valid gRPC-web Content-Type header value.
 * Note that this includes application/grpc-web-text with the additional base64
 * encoding.
 *
 * @private Internal code, does not follow semantic versioning.
 */
const contentTypeRegExp = /^application\/grpc-web(-text)?(?:\+(?:(json)(?:; ?charset=utf-?8)?|proto))?$/i;
const contentTypeProto = "application/grpc-web+proto";
const contentTypeJson = "application/grpc-web+json";
/**
 * Parse a gRPC-web Content-Type header value.
 *
 * @private Internal code, does not follow semantic versioning.
 */
function parseContentType(contentType) {
    const match = contentType === null || contentType === void 0 ? void 0 : contentType.match(contentTypeRegExp);
    if (!match) {
        return undefined;
    }
    const text = !!match[1];
    const binary = !match[2];
    return { text, binary };
}

export { contentTypeJson, contentTypeProto, contentTypeRegExp, parseContentType };
