Continue decompressing chunks even after hyper is done downloading th…

…e body

If hyper reads compressed enough data, we were decompressing 32k by 32k
but we were throwing away the end of the body because we would end up
having lots of backed up data in the cursor when hyper was done.

components/net/connector.rs

@@ -110,7 +110,37 @@ impl Stream for WrappedBody {
                         },
                     }
                 } else {
-                    None
+                    // Hyper is done downloading but we still have uncompressed data
+                    match self.decoder {
+                        Decoder::Gzip(Some(ref mut decoder)) => {
+                            let mut buf = vec![0; BUF_SIZE];
+                            let len = decoder.read(&mut buf).ok()?;
+                            if len == 0 {
+                                return None;
+                            }
+                            buf.truncate(len);
+                            Some(buf.into())
+                        },
+                        Decoder::Deflate(ref mut decoder) => {
+                            let mut buf = vec![0; BUF_SIZE];
+                            let len = decoder.read(&mut buf).ok()?;
+                            if len == 0 {
+                                return None;
+                            }
+                            buf.truncate(len);
+                            Some(buf.into())
+                        },
+                        Decoder::Brotli(ref mut decoder) => {
+                            let mut buf = vec![0; BUF_SIZE];
+                            let len = decoder.read(&mut buf).ok()?;
+                            if len == 0 {
+                                return None;
+                            }
+                            buf.truncate(len);
+                            Some(buf.into())
+                        },
+                        _ => None,
+                    }
                 }
             })
         })