Allow to set optional headers (#1456)

* Allow to set optional headers, that are passed on to Phoenix when the LiveView makes the initial connection

* Update Sources/LiveViewNative/Coordinators/LiveSessionConfiguration.swift

Co-authored-by: Carson Katri <[email protected]>
Signed-off-by: Adrian Schönig <[email protected]>

* Update Sources/LiveViewNative/Coordinators/LiveSessionCoordinator.swift

Co-authored-by: Carson Katri <[email protected]>
Signed-off-by: Adrian Schönig <[email protected]>

* Make `headers` nil by default

* Update CHANGELOG.md

---------

Signed-off-by: Adrian Schönig <[email protected]>
Co-authored-by: Carson Katri <[email protected]>

Author: nighthawk

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Added
 - `LiveViewNative.SwiftUI.normalize_os_version/1`
 - `LiveViewNative.SwiftUI.normalize_app_version/1`
+- Optional `LiveSessionConfiguration.headers`, sent when fetching the dead render (#1456)
 
 ## Changed
 - Submitting a form will remove focus from all fields (#1451)

Sources/LiveViewNative/Coordinators/LiveSessionConfiguration.swift

@@ -15,6 +15,11 @@ public struct LiveSessionConfiguration {
     ///
     /// By default, no connection params are provided.
     public var connectParams: ((URL) -> [String: Any])? = nil
+  
+    /// Optional headers that are sent when fetching the dead render.
+    ///
+    /// By default, no additional headers are provided.
+    public var headers: [String: String]? = nil
 
     /// The URL session configuration the coordinator will use for performing HTTP and socket requests.
     /// 
@@ -34,10 +39,12 @@ public struct LiveSessionConfiguration {
 
     public init(
         connectParams: ((URL) -> [String: Any])? = nil,
+        headers: [String: String]? = nil,
         urlSessionConfiguration: URLSessionConfiguration = .default,
         transition: AnyTransition? = nil,
         reconnectBehavior: ReconnectBehavior = .exponential
     ) {
+        self.headers = headers
         self.connectParams = connectParams
         self.urlSessionConfiguration = urlSessionConfiguration
         self.transition = transition

Sources/LiveViewNative/Coordinators/LiveSessionCoordinator.swift

@@ -349,6 +349,8 @@ public class LiveSessionCoordinator<R: RootRegistry>: ObservableObject {
 
         var request = request
         request.url = request.url!.appendingLiveViewItems()
+        request.allHTTPHeaderFields = configuration.headers
+        
         if let domValues {
             request.setValue(domValues.phxCSRFToken, forHTTPHeaderField: "x-csrf-token")
         }