/**
 * RequestLineParser
 *
 * Parses HTTP request lines (method, URL) and header lines.
 * Handles all standard HTTP methods and header parsing.
 *
 * Supported syntax:
 * - METHOD URL [HTTP/version]
 * - Header-Name: header-value
 */
import { HttpMethod } from '../types';
/**
 * Result from parsing a method line
 */
export interface RequestLineResult {
    method: HttpMethod;
    url: string;
}
/**
 * Result from parsing a header line
 */
export interface HeaderResult {
    key: string;
    value: string;
}
/**
 * Result from parsing multiple lines
 */
export interface ParsedLinesResult {
    method: HttpMethod | null;
    url: string | null;
    headers: HeaderResult[];
    /** Index where body content starts (after empty line) */
    bodyStartIndex: number | null;
}
export declare class RequestLineParser {
    /**
     * Regex pattern for detecting HTTP method lines
     */
    private static readonly METHOD_PATTERN;
    /**
     * Check if a line is an HTTP method line
     */
    isMethodLine(line: string): boolean;
    /**
     * Parse a method line to extract method and URL
     */
    parseMethodLine(line: string): RequestLineResult | null;
    /**
     * Check if a line is a header line
     */
    isHeaderLine(line: string): boolean;
    /**
     * Parse a header line to extract key and value
     */
    parseHeaderLine(line: string): HeaderResult | null;
    /**
     * Parse multiple lines to extract method, URL, and headers
     * Stops at empty line (body start)
     */
    parseLines(lines: string[]): ParsedLinesResult;
    /**
     * Check if a line is an HTTP method line
     */
    static isMethodLine(line: string): boolean;
    /**
     * Parse a method line to extract method and URL
     */
    static parseMethodLine(line: string): RequestLineResult | null;
    /**
     * Check if a line is a header line
     */
    static isHeaderLine(line: string): boolean;
    /**
     * Parse a header line to extract key and value
     */
    static parseHeaderLine(line: string): HeaderResult | null;
}