IIS in-proc changes some responses from content-length to chunked #10773
Description
Converting Content-Length responses to Chunked is problematic as clients may be expecting that content-length value.
Frequently reproduces with:
ctx.Request.Headers.ContentLength = ctx.Request.Path.Value.Length;
await ctx.Response.WriteAsync(ctx.Request.Path.Value);
HTTP/1.1 200 OK
Transfer-Encoding: chunked
Server: Microsoft-IIS/10.0
X-Powered-By: ASP.NET
Date: Mon, 03 Jun 2019 16:13:19 GMT
2
/a
Reproduces less frequently with:
ctx.Request.Headers.ContentLength = ctx.Request.Path.Value.Length;
return ctx.Response.WriteAsync(ctx.Request.Path.Value);
It's also known to change some auto-chunked responses to content-length, but that's less problematic as Content-Length is universally supported.