Merge pull request #1108 from MixinNetwork/feature/header_fields

Update header fields

Author: over140

Mixin/Service/Audio/Cacheable Asset/CacheableAssetFileDescription.swift

@@ -78,11 +78,7 @@ extension CacheableAssetFileDescription {
             guard let response = response as? HTTPURLResponse else {
                 return nil
             }
-            // Before iOS 13.0 Swift treat HTTP header fields as case sensitive
-            // Refactor this after deployment targets updates to iOS 13.0
-            // https://bugs.swift.org/browse/SR-2429
-            let headers = response.allHeaderFields as NSDictionary
-            guard let contentRange = headers["Content-Range"] as? String else {
+            guard let contentRange = response.value(forHTTPHeaderField: "content-range") else {
                 return nil
             }
             guard let maxRange = contentRange.components(separatedBy: "/").last else {
@@ -98,7 +94,7 @@ extension CacheableAssetFileDescription {
                 self.contentType = nil
             }
             self.contentLength = contentLength
-            if let acceptRanges = headers["Accept-Ranges"] as? String {
+            if let acceptRanges = response.value(forHTTPHeaderField: "accept-ranges") {
                 self.isByteRangeAccessSupported = acceptRanges.contains("bytes")
             } else {
                 self.isByteRangeAccessSupported = false

Mixin/UserInterface/Controllers/Login/LoginMobileNumberViewController.swift

@@ -101,7 +101,7 @@ final class LoginMobileNumberViewController: MobileNumberViewController {
                     if !error.isTransportTimedOut {
                         var userInfo = [String: Any]()
                         userInfo["error"] = "\(error)"
-                        if let requestId = weakSelf.request?.response?.allHeaderFields["x-request-id"]  {
+                        if let requestId = weakSelf.request?.response?.value(forHTTPHeaderField: "x-request-id")  {
                             userInfo["requestId"] = requestId
                         }
                         if let statusCode = weakSelf.request?.response?.statusCode {

MixinServices/MixinServices/Services/API/MixinAPI.swift

@@ -152,7 +152,7 @@ extension MixinAPI {
         let host = MixinHost.http
 
         func handleDeauthorization(response: HTTPURLResponse?) {
-            let xServerTime = TimeInterval(response?.allHeaderFields[caseInsensitive: "x-server-time"] ?? "0") ?? 0
+            let xServerTime = TimeInterval(response?.value(forHTTPHeaderField: "x-server-time") ?? "0") ?? 0
             let serverTimeIntervalSince1970 = xServerTime / TimeInterval(NSEC_PER_SEC)
             let serverTime = Date(timeIntervalSince1970: serverTimeIntervalSince1970)
             if abs(requestTime.timeIntervalSinceNow) > secondsPerMinute {
@@ -187,8 +187,8 @@ extension MixinAPI {
             .responseData(queue: queue, completionHandler: { (response) in
                 switch response.result {
                 case .success(let data):
-                    if let requestId = response.request?.allHTTPHeaderFields?["X-Request-Id"], !requestId.isEmpty {
-                        let responseRequestId = response.response?.allHeaderFields[caseInsensitive: "x-request-id"] ?? ""
+                    if let requestId = response.request?.value(forHTTPHeaderField: "x-request-id"), !requestId.isEmpty {
+                        let responseRequestId = response.response?.value(forHTTPHeaderField: "x-request-id") ?? ""
                         if requestId != responseRequestId {
                             Logger.general.error(category: "MixinAPI", message: "Mismatched request id. Request path: \(response.request?.url?.path), id: \(requestId), responded header: \(response.response?.allHeaderFields)")
                             completion(.failure(.internalServerError))
@@ -213,7 +213,7 @@ extension MixinAPI {
                     }
                 case let .failure(error):
                     let path = response.request?.url?.path ?? "(null)"
-                    let requestId = response.request?.allHTTPHeaderFields?["X-Request-Id"] ?? "(null)"
+                    let requestId = response.request?.value(forHTTPHeaderField: "x-request-id") ?? "(null)"
                     Logger.general.error(category: "MixinAPI", message: "Request with path: \(path), id: \(requestId), failed with error: \(error)" )
                     if shouldToggleServer(for: error) {
                         MixinHost.toggle(currentHttpHost: host)
@@ -247,23 +247,3 @@ extension MixinAPI {
     }
 
 }
-
-fileprivate extension Dictionary where Key == AnyHashable, Value == Any {
-    
-    subscript(caseInsensitive key: String) -> String? {
-        get {
-            if let k = keys.first(where: { ($0 as? String)?.lowercased() == key }) {
-                return self[k] as? String
-            }
-            return nil
-        }
-        set {
-            if let k = keys.first(where: { ($0 as? String)?.lowercased() == key }) {
-                self[k] = newValue
-            } else {
-                self[key] = newValue
-            }
-        }
-    }
-    
-}