HttpClient fixes.

backend/extensions/Squidex.Extensions/Actions/Fastly/FastlyActionHandler.cs

@@ -50,14 +50,16 @@ namespace Squidex.Extensions.Actions.Fastly
                 httpClient.Timeout = TimeSpan.FromSeconds(2);
 
                 var requestUrl = $"https://api.fastly.com/service/{job.FastlyServiceID}/purge/{job.Key}";
-                var request = new HttpRequestMessage(HttpMethod.Post, requestUrl);
 
+                using (var request = new HttpRequestMessage(HttpMethod.Post, requestUrl))
+                {
                     request.Headers.Add("Fastly-Key", job.FastlyApiKey);
 
                     return await httpClient.OneWayRequestAsync(request, ct: ct);
                 }
             }
         }
+    }
 
     public sealed class FastlyJob
     {

backend/extensions/Squidex.Extensions/Actions/Webhook/WebhookActionHandler.cs

@@ -57,11 +57,11 @@ namespace Squidex.Extensions.Actions.Webhook
         {
             using (var httpClient = httpClientFactory.CreateClient())
             {
-                var request = new HttpRequestMessage(HttpMethod.Post, job.RequestUrl)
+                using (var request = new HttpRequestMessage(HttpMethod.Post, job.RequestUrl)
                 {
                     Content = new StringContent(job.RequestBody, Encoding.UTF8, "application/json")
-                };
-
+                })
+                {
                     request.Headers.Add("X-Signature", job.RequestSignature);
                     request.Headers.Add("X-Application", "Squidex Webhook");
                     request.Headers.Add("User-Agent", "Squidex Webhook");
@@ -70,6 +70,7 @@ namespace Squidex.Extensions.Actions.Webhook
                 }
             }
         }
+    }
 
     public sealed class WebhookJob
     {

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/Extensions/HttpJintExtension.cs

@@ -52,9 +52,10 @@ namespace Squidex.Domain.Apps.Core.Scripting.Extensions
             {
                 using (var httpClient = httpClientFactory.CreateClient())
                 {
-                    var request = CreateRequest(url, headers);
-                    var response = await httpClient.SendAsync(request, context.CancellationToken);
-
+                    using (var request = CreateRequest(url, headers))
+                    {
+                        using (var response = await httpClient.SendAsync(request, context.CancellationToken))
+                        {
                             response.EnsureSuccessStatusCode();
 
                             var responseObject = await ParseResponse(context, response);
@@ -64,6 +65,8 @@ namespace Squidex.Domain.Apps.Core.Scripting.Extensions
                             callback(responseObject);
                         }
                     }
+                }
+            }
             catch (Exception ex)
             {
                 context.Fail(ex);

backend/src/Squidex.Domain.Apps.Entities/Backup/TempFolderBackupArchiveLocation.cs

@@ -54,7 +54,7 @@ namespace Squidex.Domain.Apps.Entities.Backup
                     {
                         client.Timeout = TimeSpan.FromHours(1);
 
-                        response = await client.GetAsync(url);
+                        response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
                         response.EnsureSuccessStatusCode();
 
                         using (var sourceStream = await response.Content.ReadAsStreamAsync())
@@ -67,6 +67,10 @@ namespace Squidex.Domain.Apps.Entities.Backup
                 {
                     throw new BackupRestoreException($"Cannot download the archive. Got status code: {response?.StatusCode}.", ex);
                 }
+                finally
+                {
+                    response?.Dispose();
+                }
             }
 
             try

backend/src/Squidex.Infrastructure/Translations/DeepLTranslator.cs

@@ -70,7 +70,10 @@ namespace Squidex.Infrastructure.Translations
                 parameters["source_lang"] = GetLanguageCode(sourceLanguage);
             }
 
-            var response = await httpClient.PostAsync(Url, new FormUrlEncodedContent(parameters), ct);
+            var body = new FormUrlEncodedContent(parameters);
+
+            using (var response = await httpClient.PostAsync(Url, body, ct))
+            {
                 var responseString = await response.Content.ReadAsStringAsync();
 
                 if (response.IsSuccessStatusCode)
@@ -90,6 +93,7 @@ namespace Squidex.Infrastructure.Translations
 
                 return new Translation(TranslationResult.Failed, resultText: responseString);
             }
+        }
 
         private static string GetLanguageCode(Language language)
         {

backend/src/Squidex/Areas/Api/Controllers/Users/UsersController.cs

@@ -189,8 +189,8 @@ namespace Squidex.Areas.Api.Controllers.Users
 
                         if (!string.IsNullOrWhiteSpace(url))
                         {
-                            var response = await client.GetAsync(url);
-
+                            using (var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead))
+                            {
                                 if (response.IsSuccessStatusCode)
                                 {
                                     var contentType = response.Content.Headers.ContentType.ToString();
@@ -210,6 +210,7 @@ namespace Squidex.Areas.Api.Controllers.Users
                         }
                     }
                 }
+            }
             catch (Exception ex)
             {
                 log.LogError(ex, w => w