win_get_url - Fix handling of restricted headers (#57892)

* fix 57880

* ADded test

* Remove host header from test

* TEst error

* Fix tests

* fix user agent test

changelogs/fragments/win_get_url-Fix-restricted-header-handling.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "win_get_url - Fix handling of restricted headers as per (https://github.com/ansible/ansible/issues/57880)"

lib/ansible/modules/windows/win_get_url.ps1

@@ -81,7 +81,25 @@ Function Invoke-AnsibleWebRequest {
     $web_request.Method = $Method.($web_request.GetType().Name)
 
     foreach ($header in $headers.GetEnumerator()) {
-        $web_request.Headers.Add($header.Key, $header.Value)
+        # some headers need to be set on the property itself
+        switch ($header.Key) {
+            Accept { $web_request.Accept = $header.Value }
+            Connection { $web_request.Connection = $header.Value }
+            Content-Length { $web_request.ContentLength = $header.Value }
+            Content-Type { $web_request.ContentType = $header.Value }
+            Expect { $web_request.Expect = $header.Value }
+            Date { $web_request.Date = $header.Value }
+            Host { $web_request.Host = $header.Value }
+            If-Modified-Since { $web_request.IfModifiedSince = $header.Value }
+            Range { $web_request.AddRange($header.Value) }
+            Referer { $web_request.Referer = $header.Value }
+            Transfer-Encoding {
+                $web_request.SendChunked = $true
+                $web_request.TransferEncoding = $header.Value
+            }
+            User-Agent { $web_request.UserAgent = $header.Value }
+            default { $web_request.Headers.Add($header.Key, $header.Value) }
+        }
     }
 
     if ($timeout) {

test/integration/targets/win_get_url/tasks/tests_url.yml

@@ -188,6 +188,8 @@
     dest: '{{ testing_dir }}\headers.txt'
     headers:
       testing: 123
+      User-Agent: 'badAgent'
+      accept: 'text/html'
   register: headers
 
 - name: get result of send request with headers
@@ -201,3 +203,5 @@
     - headers is changed
     - headers.status_code == 200
     - (headers_actual.content | b64decode | from_json).headers.Testing == '123'
+    - (headers_actual.content | b64decode | from_json).headers["User-Agent"] == 'badAgent'
+    - (headers_actual.content | b64decode | from_json).headers.Accept == 'text/html'