47 lines
1.4 KiB
Swift
Executable File
47 lines
1.4 KiB
Swift
Executable File
//
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// HTTPConditionalGetInfo.swift
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// RSWeb
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//
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// Created by Brent Simmons on 4/11/16.
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// Copyright © 2016 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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public struct HTTPConditionalGetInfo: Codable, Equatable {
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public let lastModified: String?
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public let etag: String?
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public init?(lastModified: String?, etag: String?) {
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if lastModified == nil && etag == nil {
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return nil
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}
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self.lastModified = lastModified
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self.etag = etag
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}
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public init?(urlResponse: HTTPURLResponse) {
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let lastModified = urlResponse.valueForHTTPHeaderField(HTTPResponseHeader.lastModified)
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let etag = urlResponse.valueForHTTPHeaderField(HTTPResponseHeader.etag)
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self.init(lastModified: lastModified, etag: etag)
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}
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public init?(headers: [AnyHashable : Any]) {
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let lastModified = headers[HTTPResponseHeader.lastModified] as? String
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let etag = headers[HTTPResponseHeader.etag] as? String
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self.init(lastModified: lastModified, etag: etag)
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}
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public func addRequestHeadersToURLRequest(_ urlRequest: inout URLRequest) {
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// Bug seen in the wild: lastModified with last possible 32-bit date, which is in 2038. Ignore those.
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// TODO: drop this check in late 2037.
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if let lastModified = lastModified, !lastModified.contains("2038") {
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urlRequest.addValue(lastModified, forHTTPHeaderField: HTTPRequestHeader.ifModifiedSince)
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}
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if let etag = etag {
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urlRequest.addValue(etag, forHTTPHeaderField: HTTPRequestHeader.ifNoneMatch)
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}
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}
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}
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