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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| // | ||
| // WebRequest+WbiSign.swift | ||
| // BilibiliLive | ||
| // | ||
| // Created by yicheng on 1/12/2024. | ||
| // | ||
|
|
||
| import Alamofire | ||
| import CommonCrypto | ||
| import SwiftyJSON | ||
|
|
||
| extension WebRequest { | ||
| static func addWbiSign(method: HTTPMethod = .get, | ||
| url: URLConvertible, | ||
| parameters: Parameters = [:], | ||
| onComplete: @escaping (String?) -> Void) | ||
| { | ||
| do { | ||
| let urlObj = try url.asURL() | ||
| if urlObj.absoluteString.contains("/wbi/") == true, method == .get { | ||
| var request = URLRequest(url: urlObj) | ||
| request.method = .get | ||
| request = try URLEncoding.queryString.encode(request, with: parameters) | ||
| if let query = request.url?.query(percentEncoded: true) { | ||
| biliWbiSign(param: query) { res in | ||
| if let res { | ||
| let urlString = urlObj.absoluteString + "?" + res | ||
| onComplete(urlString) | ||
| return | ||
| } else { | ||
| onComplete(nil) | ||
| } | ||
| } | ||
| return | ||
| } | ||
| } | ||
| onComplete(nil) | ||
| } catch { | ||
| onComplete(nil) | ||
| } | ||
| } | ||
|
|
||
| // https://github.com/SocialSisterYi/bilibili-API-collect/blob/master/docs/misc/sign/wbi.md#Swift | ||
| private static func biliWbiSign(param: String, completion: @escaping (String?) -> Void) { | ||
| func getMixinKey(orig: String) -> String { | ||
| return String(mixinKeyEncTab.map { orig[orig.index(orig.startIndex, offsetBy: $0)] }.prefix(32)) | ||
| } | ||
|
|
||
| func encWbi(params: [String: Any], imgKey: String, subKey: String) -> [String: Any] { | ||
| var params = params | ||
| let mixinKey = getMixinKey(orig: imgKey + subKey) | ||
| let currTime = round(Date().timeIntervalSince1970) | ||
| params["wts"] = currTime | ||
| params = params.sorted { $0.key < $1.key }.reduce(into: [:]) { $0[$1.key] = $1.value } | ||
| params = params.mapValues { String(describing: $0).filter { !"!'()*".contains($0) } } | ||
| let query = params.map { "\($0.key)=\($0.value)" }.joined(separator: "&") | ||
| let wbiSign = calculateMD5(string: query + mixinKey) | ||
| params["w_rid"] = wbiSign | ||
| return params | ||
| } | ||
|
|
||
| func getWbiKeys(completion: @escaping (Result<(imgKey: String, subKey: String), Error>) -> Void) { | ||
| class Cache { | ||
| var imgKey: String? | ||
| var subKey: String? | ||
| var lastUpdate: Date? | ||
|
|
||
| static let shared = Cache() | ||
| } | ||
|
|
||
| if let imgKey = Cache.shared.imgKey, | ||
| let subKey = Cache.shared.subKey, | ||
| let lastUpdate = Cache.shared.lastUpdate, | ||
| Date().timeIntervalSince(lastUpdate) < 60 * 60 * 12, | ||
| Calendar.current.isDate(Date(), inSameDayAs: lastUpdate) | ||
| { | ||
| completion(.success((imgKey, subKey))) | ||
| return | ||
| } | ||
|
|
||
| let headers: HTTPHeaders = [ | ||
| "User-Agent": Keys.userAgent, | ||
| "Referer": Keys.referer, | ||
| ] | ||
|
|
||
| AF.request("https://api.bilibili.com/x/web-interface/nav", headers: headers).responseData { response in | ||
| switch response.result { | ||
| case let .success(value): | ||
| let json = JSON(value) | ||
| let imgURL = json["data"]["wbi_img"]["img_url"].string ?? "" | ||
| let subURL = json["data"]["wbi_img"]["sub_url"].string ?? "" | ||
| let imgKey = imgURL.components(separatedBy: "/").last?.components(separatedBy: ".").first ?? "" | ||
| let subKey = subURL.components(separatedBy: "/").last?.components(separatedBy: ".").first ?? "" | ||
| Cache.shared.imgKey = imgKey | ||
| Cache.shared.subKey = subKey | ||
| Cache.shared.lastUpdate = Date() | ||
| completion(.success((imgKey, subKey))) | ||
| case let .failure(error): | ||
| completion(.failure(error)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func calculateMD5(string: String) -> String { | ||
| let data = Data(string.utf8) | ||
| var digest = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH)) | ||
| _ = data.withUnsafeBytes { | ||
| CC_MD5($0.baseAddress, CC_LONG(data.count), &digest) | ||
| } | ||
| return digest.map { String(format: "%02hhx", $0) }.joined() | ||
| } | ||
|
|
||
| let mixinKeyEncTab = [ | ||
| 46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35, 27, 43, 5, 49, | ||
| 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13, 37, 48, 7, 16, 24, 55, 40, | ||
| 61, 26, 17, 0, 1, 60, 51, 30, 4, 22, 25, 54, 21, 56, 59, 6, 63, 57, 62, 11, | ||
| 36, 20, 34, 44, 52, | ||
| ] | ||
|
|
||
| getWbiKeys { result in | ||
| switch result { | ||
| case let .success(keys): | ||
| let spdParam = param.components(separatedBy: "&") | ||
| var spdDicParam = [String: String]() | ||
| spdParam.forEach { pair in | ||
| let components = pair.components(separatedBy: "=") | ||
| if components.count == 2 { | ||
| spdDicParam[components[0]] = components[1] | ||
| } | ||
| } | ||
|
|
||
| let signedParams = encWbi(params: spdDicParam, imgKey: keys.imgKey, subKey: keys.subKey) | ||
| let query = signedParams.map { "\($0.key)=\($0.value)" }.joined(separator: "&") | ||
| completion(query) | ||
| case let .failure(error): | ||
| print("Error getting keys: \(error)") | ||
| completion(nil) | ||
| } | ||
| } | ||
| } | ||
| } |
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