Buffer!ubyte which you can use as ForwardRange or DirectAccessRange, or extract data with .data() method.
globalLogLevel(LogLevel.info); auto r = getContent("https://httpbin.org/stream/20"); assert(r.splitter('\n').filter!("a.length>0").count == 20);
Call GET, and return response content. This is the simplest case, when all you need is the response body.