swagger-ui-bundle.js (~1MB) file too big for hosting in AWS Lambda behind ALB

Q&A (please complete the following information)

• OS: client Windows / server: Amazon Linux 2, AWS Lambda
• Browser: all affected (it’s a server issue)
• Version: N/A
• Method of installation: via Swashbuckle.AspNetCore
• Swagger-UI version: 3.25.0
• Swagger/OpenAPI version: N/A

Describe the bug you’re encountering

This issue is related to size of the swagger-ui-bundle.js file. Currently it’s close to 1MB which makes it not possible to host in AWS Lambda (behind AWS ALB - Application Load Balancer). AWS ALB + AWS Lambda has a limit for files it can transfer which is set to 1MB which has been already reached when trying to serve swagger-ui-bundle.js file from version 3.25.0

This issue is to open the discussion about how we could potentially solve it, e.g.:

• is there a chance to decrease size of swagger-ui-bundle.js file?
• could we split this file into smaller chunks?

Expected behavior

SwaggerUI can be hosted in AWS Lambda.

[DamianKedzior]

Hi @webron, just wanted to follow up with you and ask if you have a plan in mind to address this issue?

[srudenkord]

Just to confirm the workaround works. Code should be like the following

  public void ConfigureServices(IServiceCollection services)
        {

             ...

            services.AddResponseCompression(options =>
            {
                options.Providers.Add<BrotliCompressionProvider>();
                options.Providers.Add<GzipCompressionProvider>();
                options.MimeTypes = new[] {"application/json", "text/tab-separated-values", "application/javascript", "text/csv", "text"};
            });

            
        }
        
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            .....
            
            app.UseResponseCompression();

            .....   
        }