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    return send_file( $in_fh,
        streaming    => 1,
...
            }
        },
    );

Device::WebIO::Dancer:5371] error @2014-08-13 18:01:28> Route exceptio
+n: isa check for "path_info" failed: GLOB(0x222a5c8) is not a string!
+ at (eval 197) line 27.

    return send_file( \'foo',
        streaming    => 1,
...
            }
        },
    );

    return send_file( '/dev/zero',
        streaming    => 1,
...
            }
        },
    );

return send_file( '$in_fh,
        streaming    => 1,
        content_type => $mime_type,
    );