From 54fa14172ddcde2520072129b7c5f526b4f08609 Mon Sep 17 00:00:00 2001
From: olegd-superoffice <104191651+olegd-superoffice@users.noreply.github.com>
Date: Thu, 28 Sep 2023 18:30:15 +0200
Subject: [PATCH] Serialize to UTF-8 bytes with System.Text.Json. (#4175)

Serializing to a UTF-8 byte array is about 5-10% faster
than using the string-based methods.
---
 .../Templates/Client.Class.liquid                      | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid b/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
index a8bc24be9a..fefd4959eb 100644
--- a/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
+++ b/src/NSwag.CodeGeneration.CSharp/Templates/Client.Class.liquid
@@ -206,7 +206,7 @@
                 var content_ = new System.Net.Http.StringContent({{ operation.ContentParameter.VariableName }});
                 content_.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse("{{ operation.Consumes }}");
 {%         elsif operation.ConsumesFormUrlEncoded -%}
-                var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.Serialize{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ operation.ContentParameter.VariableName }}, _settings.Value);
+                var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.SerializeToUtf8Bytes{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ operation.ContentParameter.VariableName }}, _settings.Value);
                 var dictionary_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.Deserialize{% else %}Newtonsoft.Json.JsonConvert.DeserializeObject{% endif %}<System.Collections.Generic.Dictionary<string, string>>(json_, _settings.Value);
                 var content_ = new System.Net.Http.FormUrlEncodedContent(dictionary_);
                 content_.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse("{{ operation.Consumes }}");
@@ -214,8 +214,8 @@
                 var content_ = new System.Net.Http.StringContent({{ operation.ContentParameter.VariableName }});
                 content_.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse("{{ operation.Consumes }}");
 {%         else -%}
-                var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.Serialize{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ operation.ContentParameter.VariableName }}, {% if SerializeTypeInformation %}typeof({{ operation.ContentParameter.Type }}), {% endif %}{% if UseRequestAndResponseSerializationSettings %}_requestSettings{% else %}_settings{% endif %}.Value);
-                var content_ = new System.Net.Http.StringContent(json_);
+                var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.SerializeToUtf8Bytes{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ operation.ContentParameter.VariableName }}, {% if SerializeTypeInformation %}typeof({{ operation.ContentParameter.Type }}), {% endif %}{% if UseRequestAndResponseSerializationSettings %}_requestSettings{% else %}_settings{% endif %}.Value);
+                var content_ = new System.Net.Http.{% if UseSystemTextJson %}ByteArrayContent{% else %}StringContent{% endif %}(json_);
                 content_.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse("{{ operation.Consumes }}");
 {%         endif -%}
                 request_.Content = content_;
@@ -269,8 +269,8 @@
                         content_.Add(new System.Net.Http.StringContent(ConvertToString(item_, System.Globalization.CultureInfo.InvariantCulture)), "{{ parameter.Name }}");
                     }
 {%                     elsif parameter.IsObject -%}
-                    var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.Serialize{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ parameter.VariableName }}, {% if UseRequestAndResponseSerializationSettings %}_requestSettings{% else %}_settings{% endif %}.Value);
-                    content_.Add(new System.Net.Http.StringContent(json_, System.Text.Encoding.UTF8, "application/json"), "{{ parameter.Name }}");
+                    var json_ = {% if UseSystemTextJson %}System.Text.Json.JsonSerializer.SerializeToUtf8Bytes{% else %}Newtonsoft.Json.JsonConvert.SerializeObject{% endif %}({{ parameter.VariableName }}, {% if UseRequestAndResponseSerializationSettings %}_requestSettings{% else %}_settings{% endif %}.Value);
+                    content_.Add(new System.Net.Http.{% if UseSystemTextJson %}ByteArrayContent(json_{% else %}StringContent(json_, System.Text.Encoding.UTF8, "application/json"{% endif %}), "{{ parameter.Name }}");
 {%                     else -%}
                     content_.Add(new System.Net.Http.StringContent(ConvertToString({{ parameter.VariableName }}, System.Globalization.CultureInfo.InvariantCulture)), "{{ parameter.Name }}");
 {%                     endif -%}