#include "envoy/formatter/http_formatter_context.h"

#include "source/common/common/assert.h"

#include "source/common/common/empty_string.h"

#include "source/common/formatter/substitution_formatter.h"

#include "source/common/http/header_map_impl.h"

#include "source/common/http/utility.h"

namespace Envoy {

namespace Formatter {

static constexpr absl::string_view DEFAULT_FORMAT =

    "[%START_TIME%] "

    "\"%REQUEST_HEADER(:METHOD)% %REQUEST_HEADER(X-ENVOY-ORIGINAL-PATH?:PATH)% %PROTOCOL%\" "

    "%RESPONSE_CODE% "

    "%RESPONSE_FLAGS% "

    "%BYTES_RECEIVED% "

    "%BYTES_SENT% "

    "%DURATION% "

    "%RESPONSE_HEADER(X-ENVOY-UPSTREAM-SERVICE-TIME)% "

    "\"%REQUEST_HEADER(X-FORWARDED-FOR)%\" "

    "\"%REQUEST_HEADER(USER-AGENT)%\" "

    "\"%REQUEST_HEADER(X-REQUEST-ID)%\" "

    "\"%REQUEST_HEADER(:AUTHORITY)%\" "

    "\"%UPSTREAM_HOST%\"\n";

  // It is possible that failed to parse the default format string if the required formatters

  // are compiled out.

} // namespace Formatter

} // namespace Envoy