From 7125b8713233cde760bf1a43a38fa91eb2b8e9c1 Mon Sep 17 00:00:00 2001
From: Wilko van der Veen <wilko.vanderveen@ad.dfnld.nl>
Date: Tue, 26 Apr 2022 15:17:55 +0200
Subject: [PATCH] Fix missing inline option for smtp mailer and added some unit
 tests for this change.

---
 src/Senders/FluentEmail.Smtp/SmtpSender.cs    |   8 ++-
 .../Attachments/fluentemail_logo_64x64.png    | Bin 0 -> 20822 bytes
 .../FluentEmail.Core.Tests.csproj             |   3 +
 .../FluentEmail.Core.Tests/SmtpSenderTests.cs |  57 ++++++++++++++++++
 4 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 test/FluentEmail.Core.Tests/Attachments/fluentemail_logo_64x64.png

diff --git a/src/Senders/FluentEmail.Smtp/SmtpSender.cs b/src/Senders/FluentEmail.Smtp/SmtpSender.cs
index 4b13d288..6d214370 100644
--- a/src/Senders/FluentEmail.Smtp/SmtpSender.cs
+++ b/src/Senders/FluentEmail.Smtp/SmtpSender.cs
@@ -3,6 +3,7 @@
 using FluentEmail.Core.Models;
 using System;
 using System.Net.Mail;
+using System.Net.Mime;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -146,9 +147,12 @@ private MailMessage CreateMailMessage(IFluentEmail email)
 
             data.Attachments.ForEach(x =>
             {
-                System.Net.Mail.Attachment a = new System.Net.Mail.Attachment(x.Data, x.Filename, x.ContentType);
+                System.Net.Mail.Attachment a = new System.Net.Mail.Attachment(x.Data, x.Filename, x.ContentType)
+                {
+                    ContentId = x.ContentId
+                };
 
-                a.ContentId = x.ContentId;
+                a.ContentDisposition.Inline = x.IsInline;
 
                 message.Attachments.Add(a);
             });
diff --git a/test/FluentEmail.Core.Tests/Attachments/fluentemail_logo_64x64.png b/test/FluentEmail.Core.Tests/Attachments/fluentemail_logo_64x64.png
new file mode 100644
index 0000000000000000000000000000000000000000..1aab18dc4cbc1380fdf9f5c4057f28a3878416f3
GIT binary patch
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diff --git a/test/FluentEmail.Core.Tests/FluentEmail.Core.Tests.csproj b/test/FluentEmail.Core.Tests/FluentEmail.Core.Tests.csproj
index cc26ca67..fc3ed0cb 100644
--- a/test/FluentEmail.Core.Tests/FluentEmail.Core.Tests.csproj
+++ b/test/FluentEmail.Core.Tests/FluentEmail.Core.Tests.csproj
@@ -30,6 +30,9 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <EmbeddedResource Include="test-embedded.txt" />
+    <None Update="Attachments\fluentemail_logo_64x64.png">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="logotest.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
diff --git a/test/FluentEmail.Core.Tests/SmtpSenderTests.cs b/test/FluentEmail.Core.Tests/SmtpSenderTests.cs
index 8fca3c39..64625d90 100644
--- a/test/FluentEmail.Core.Tests/SmtpSenderTests.cs
+++ b/test/FluentEmail.Core.Tests/SmtpSenderTests.cs
@@ -90,6 +90,63 @@ public async Task CanSendEmailWithAttachments()
             Assert.IsNotEmpty(files);
         }
 
+        [Test]
+        public async Task CanSendEmailWithInlineImageAndAttachments()
+        {
+            var stream = File.OpenRead(@"C:\Users\wilko.vanderveen\source\repos\FluentEmail\test\FluentEmail.Core.Tests\Attachments\fluentemail_logo_64x64.png");
+                    
+            stream.Seek(0, SeekOrigin.Begin);
+
+            var attachment = new Attachment
+            {
+                IsInline = true,
+                Data = stream,
+                ContentType = "image/png",
+                Filename = "fluentemail-logo.png",
+                ContentId = "MyVeryCoolContentId"
+            };
+
+            var email = TestEmail
+                .Attach(attachment);
+
+            email.Body("<html><head></head><body><img src=\"cid:MyVeryCoolContentId\" /></body></html", true);
+      
+
+            var response = await email.SendAsync();
+
+            Assert.IsTrue(response.Successful);
+            var files = Directory.EnumerateFiles(tempDirectory, "*.eml");
+            Assert.IsNotEmpty(files);
+        }
+
+        [Test]
+        public async Task CanSendEmailWithInlineImage()
+        {
+            var stream = File.OpenRead(@"C:\Users\wilko.vanderveen\source\repos\FluentEmail\test\FluentEmail.Core.Tests\Attachments\fluentemail_logo_64x64.png");
+
+            stream.Seek(0, SeekOrigin.Begin);
+
+            var attachment = new Attachment
+            {
+                IsInline = true,
+                Data = stream,
+                ContentType = "image/png",              
+                ContentId = "MyVeryCoolContentId"
+            };
+
+            var email = TestEmail
+                .Attach(attachment);
+
+            email.Body("<html><head></head><body><img src=\"cid:MyVeryCoolContentId\" /></body></html", true);
+
+
+            var response = await email.SendAsync();
+
+            Assert.IsTrue(response.Successful);
+            var files = Directory.EnumerateFiles(tempDirectory, "*.eml");
+            Assert.IsNotEmpty(files);
+        }
+
         [Test]
         public async Task CanSendAsyncHtmlAndPlaintextTogether()
         {