Early rejection for requests exceeding configured maxRequestLength

[yzfeng2020]

It is is possible to implement early rejection of HTTP requests when the Content-Length header indicates a value larger than the maximum configured request length. This would be beneficial to avoid unnecessary processing of oversized requests.

The relevant code section is located at

armeria/core/src/main/java/com/linecorp/armeria/server/Http1RequestDecoder.java

Lines 211 to 226 in d30dff0

	if (contentLengthStr != null) {
	long contentLength;
	try {
	contentLength = Long.parseLong(contentLengthStr);
	} catch (NumberFormatException ignored) {
	contentLength = -1;
	}
	if (contentLength < 0) {
	fail(id, headers, HttpStatus.BAD_REQUEST, "Invalid content length", null);
	return;
	}
	contentEmpty = contentLength == 0;
	} else {
	contentEmpty = true;
	}

for H1 and

armeria/core/src/main/java/com/linecorp/armeria/server/Http2RequestDecoder.java

Lines 167 to 180 in d30dff0

	final String contentLengthStr = headers.get(HttpHeaderNames.CONTENT_LENGTH);
	if (contentLengthStr != null) {
	long contentLength;
	try {
	contentLength = Long.parseLong(contentLengthStr);
	} catch (NumberFormatException ignored) {
	contentLength = -1;
	}
	if (contentLength < 0) {
	writeErrorResponse(streamId, headers, HttpStatus.BAD_REQUEST,
	"Invalid content length", null);
	return;
	}
	}

for H2.

discord discussion: https://discord.com/channels/1087271586832318494/1087272728177942629/1275651316034699327