/**
 * @license
 * Copyright 2025 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Normalizes HTTP header values by handling multiline values.
 * Multiline header values are joined with commas according to HTTP/1.1 spec.
 *
 * @internal
 */
export function normalizeHeaderValue(header) {
    if (!header.includes('\n')) {
        return header;
    }
    return header
        .split('\n')
        .map(v => {
        return v.trim();
    })
        .filter(Boolean)
        .join(', ');
}
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