Make normalizeHeaderKey optional

[djannot]

Could you please make this function optional ?

Even if headers are supposed to be case-insensitive, many applications aren't working correctly when they header case isn't the one they were expecting. I want to build a reverse proxy based on fasthttp and need it to be compatible with any application.

[valyala]

@djannot , thanks for the feature request. I'll look into it.

[valyala]

Done - see DisableHeaderNamesNormalizing flag inside Server.

[djannot]

I've tried to use the new feature this way:

c := &fasthttp.HostClient{
        Addr: "10.64.231.196:9020",
    }

  response := fasthttp.AcquireResponse()
  response.Header.DisableNormalizing()

  err := c.DoTimeout(&ctx.Request, response, time.Second * 3600)
    if err != nil {
        log.Printf("Error: %s", err)
    }
  fmt.Println(response.Header.String())

But response headers are normalized.

Did I make something wrong ?

[valyala]

The feature wan't implemented for the HostClient :)

Just added DisableHeaderNamesNormalizing option to Client and HostClient in e252d37 . See the corresponding test in the commit for details.