add text/event-stream

Author: KSemenenko

Directory.Build.props

@@ -17,8 +17,8 @@
     <RepositoryUrl>https://github.com/managedcode/MimeTypes</RepositoryUrl>
     <PackageProjectUrl>https://github.com/managedcode/MimeTypes</PackageProjectUrl>
     <Product>Managed Code - MimeTypes</Product>
-    <Version>1.0.2</Version>
-    <PackageVersion>1.0.2</PackageVersion>
+    <Version>1.0.3</Version>
+    <PackageVersion>1.0.3</PackageVersion>
 
 </PropertyGroup>
 <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">

ManagedCode.MimeTypes.Tests/GeneratorTests.cs

@@ -8,6 +8,7 @@ public class GeneratorTests
     [Fact]
     public void ExtensionsTest()
     {
+        MimeHelper.GetMimeType("somefile.pdf").ShouldBe("application/pdf");
         MimeHelper.GetMimeType("pdf").ShouldBe("application/pdf");
         MimeHelper.GetMimeType(".gz").ShouldBe("application/gzip");
         MimeHelper.GetMimeType("word.docx").ShouldBe("application/vnd.openxmlformats-officedocument.wordprocessingml.document");

ManagedCode.MimeTypes/ManagedCode.MimeTypes.csproj

@@ -3,7 +3,7 @@
     <PropertyGroup>
         <Nullable>enable</Nullable>
         <LangVersion>13</LangVersion>
-        <TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
         <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
         <CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)Generated</CompilerGeneratedFilesOutputPath>
     </PropertyGroup>

ManagedCode.MimeTypes/MimeHelper.cs

@@ -50,6 +50,52 @@ public static string GetMimeType(string extension)
     private static readonly Regex CalendarPattern = new(@"^(?:text/calendar|application/ics)$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
     private static readonly Regex EmailPattern = new(@"^(?:message/(?:rfc822|global)|application/(?:mbox|x-msmessage))", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
+    private static readonly Dictionary<byte[], string> MimeTypesForContent = new()
+    {
+        { new byte[] { 0x25, 0x50, 0x44, 0x46 }, "application/pdf" }, // PDF
+        { new byte[] { 0xFF, 0xD8, 0xFF }, "image/jpeg" }, // JPEG
+        { new byte[] { 0x89, 0x50, 0x4E, 0x47 }, "image/png" }, // PNG
+        { new byte[] { 0x47, 0x49, 0x46, 0x38 }, "image/gif" }, // GIF
+        { new byte[] { 0x50, 0x4B, 0x03, 0x04 }, "application/zip" }, // ZIP
+        { new byte[] { 0x1F, 0x8B }, "application/gzip" } // GZIP
+    };
+    
+    public static string GetMimeTypeByContent(string filePath)
+    {
+        byte[] fileHeader = new byte[4];
+        using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
+        {
+            fs.ReadExactly(fileHeader, 0, fileHeader.Length);
+        }
+
+        foreach (var mime in MimeTypes)
+        {
+            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key))
+            {
+                return mime.Value;
+            }
+        }
+
+        return "application/octet-stream"; // Default MIME type
+    }
+
+    public static string GetMimeTypeByContent(Stream fileStream)
+    {
+        byte[] fileHeader = new byte[4];
+        fileStream.ReadExactly(fileHeader, 0, fileHeader.Length);
+
+        foreach (var mime in MimeTypes)
+        {
+            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key))
+            {
+                return mime.Value;
+            }
+        }
+
+        return "application/octet-stream"; // Default MIME type
+    }
+
+    
     public static MimeTypeCategory GetMimeCategory(string mime)
     {
         if (string.IsNullOrWhiteSpace(mime))

ManagedCode.MimeTypes/mimeTypes.json

@@ -1173,5 +1173,6 @@
   "zip": "application/zip",
   "zir": "application/vnd.zul",
   "zirz": "application/vnd.zul",
-  "zmm": "application/vnd.handheld-entertainment+xml"
+  "zmm": "application/vnd.handheld-entertainment+xml",
+  "event_stream":"text/event-stream"
 }