wehub-resource-sync
93 lines
3.7 KiB
Swift
93 lines
3.7 KiB
Swift
import Foundation
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public enum CookieHeaderNormalizer {
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private static let headerPatterns: [String] = [
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#"(?i)-H\s*'Cookie:\s*([^']+)'"#,
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#"(?i)-H\s*\"Cookie:\s*([^\"]+)\""#,
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#"(?i)\bcookie:\s*'([^']+)'"#,
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#"(?i)\bcookie:\s*\"([^\"]+)\""#,
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#"(?i)\bcookie:\s*([^\r\n]+)"#,
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#"(?i)(?:^|\s)(?:--cookie|-b)\s*'([^']+)'"#,
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#"(?i)(?:^|\s)(?:--cookie|-b)\s*\"([^\"]+)\""#,
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#"(?i)(?:^|\s)-b([^\s=]+=[^\s]+)"#,
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#"(?i)(?:^|\s)(?:--cookie|-b)\s+([^\s]+)"#,
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]
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public static func normalize(_ raw: String?) -> String? {
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guard var value = raw?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {
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return nil
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}
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if let extracted = self.extractHeader(from: value) {
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value = extracted
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}
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value = self.stripCookiePrefix(value)
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value = self.stripWrappingQuotes(value)
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value = value.trimmingCharacters(in: .whitespacesAndNewlines)
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return value.isEmpty ? nil : value
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}
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public static func pairs(from raw: String) -> [(name: String, value: String)] {
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guard let normalized = self.normalize(raw) else { return [] }
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var results: [(name: String, value: String)] = []
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results.reserveCapacity(6)
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for part in normalized.split(separator: ";") {
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let trimmed = part.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !trimmed.isEmpty,
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let equalsIndex = trimmed.firstIndex(of: "=")
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else {
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continue
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}
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let name = trimmed[..<equalsIndex].trimmingCharacters(in: .whitespacesAndNewlines)
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let value = trimmed[trimmed.index(after: equalsIndex)...]
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.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !name.isEmpty else { continue }
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results.append((name: String(name), value: String(value)))
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}
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return results
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}
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public static func filteredHeader(from raw: String?, allowedNames: Set<String>) -> String? {
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let filtered = self.pairs(from: raw ?? "").filter { allowedNames.contains($0.name) }
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guard !filtered.isEmpty else { return nil }
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return filtered.map { "\($0.name)=\($0.value)" }.joined(separator: "; ")
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}
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private static func extractHeader(from raw: String) -> String? {
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for pattern in self.headerPatterns {
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guard let regex = try? NSRegularExpression(pattern: pattern, options: []) else { continue }
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let range = NSRange(raw.startIndex..<raw.endIndex, in: raw)
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guard let match = regex.firstMatch(in: raw, options: [], range: range),
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match.numberOfRanges >= 2,
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let captureRange = Range(match.range(at: 1), in: raw)
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else {
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continue
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}
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let captured = raw[captureRange].trimmingCharacters(in: .whitespacesAndNewlines)
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if !captured.isEmpty { return String(captured) }
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}
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return nil
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}
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private static func stripCookiePrefix(_ raw: String) -> String {
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let trimmed = raw.trimmingCharacters(in: .whitespacesAndNewlines)
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guard trimmed.lowercased().hasPrefix("cookie:") else { return trimmed }
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let idx = trimmed.index(trimmed.startIndex, offsetBy: "cookie:".count)
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return String(trimmed[idx...]).trimmingCharacters(in: .whitespacesAndNewlines)
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}
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private static func stripWrappingQuotes(_ raw: String) -> String {
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guard raw.count >= 2 else { return raw }
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if (raw.hasPrefix("\"") && raw.hasSuffix("\"")) ||
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(raw.hasPrefix("'") && raw.hasSuffix("'"))
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{
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return String(raw.dropFirst().dropLast())
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}
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return raw
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}
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}
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