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[OpenAPI] Refactor MapOpenApi #62194

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Jun 2, 2025
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[OpenAPI] Refactor MapOpenApi #62194

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22 changes: 14 additions & 8 deletions src/OpenApi/src/Extensions/OpenApiEndpointRouteBuilderExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,21 +54,27 @@ public static IEndpointConventionBuilder MapOpenApi(this IEndpointRouteBuilder e
var document = await documentService.GetOpenApiDocumentAsync(context.RequestServices, context.Request, context.RequestAborted);
var documentOptions = options.Get(lowercasedDocumentName);

using var writer = new Utf8BufferTextWriter();
writer.SetWriter(context.Response.BodyWriter);
using var textWriter = new Utf8BufferTextWriter();
textWriter.SetWriter(context.Response.BodyWriter);

string contentType;
OpenApiWriterBase openApiWriter;

if (UseYaml(pattern))
{
context.Response.ContentType = "text/plain+yaml;charset=utf-8";
await context.Response.StartAsync();
await document.SerializeAsync(new OpenApiYamlWriter(writer), documentOptions.OpenApiVersion, context.RequestAborted);
contentType = "text/plain+yaml;charset=utf-8";
openApiWriter = new OpenApiYamlWriter(textWriter);
}
else
{
context.Response.ContentType = "application/json;charset=utf-8";
await context.Response.StartAsync();
await document.SerializeAsync(new OpenApiJsonWriter(writer), documentOptions.OpenApiVersion, context.RequestAborted);
contentType = "application/json;charset=utf-8";
openApiWriter = new OpenApiJsonWriter(textWriter);
}

context.Response.ContentType = contentType;

await context.Response.StartAsync();
await document.SerializeAsync(openApiWriter, documentOptions.OpenApiVersion, context.RequestAborted);
await context.Response.BodyWriter.FlushAsync(context.RequestAborted);
}
}).ExcludeFromDescription();
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