Method handleHeader

src/utility/WebSocketsServer.cpp:716–870

* handles http header reading for WebSocket upgrade * @param client WSclient_t * ///< pointer to the client struct * @param headerLine String ///< the header being read / processed */

 * @param headerLine String ///< the header being read / processed
 */
void WebSocketsServer::handleHeader(WSclient_t * client, String * headerLine) {

	static const char * NEW_LINE = "\r\n";

	headerLine->trim(); // remove \r

	if(headerLine->length() > 0) {
		DEBUG_WEBSOCKETS("[WS-Server][%d][handleHeader] RX: %s\n", client->num, headerLine->c_str());

		// websocket requests always start with GET see rfc6455
		if(headerLine->startsWith("GET ")) {

			// cut URL out
			client->cUrl = headerLine->substring(4, headerLine->indexOf(' ', 4));

			//reset non-websocket http header validation state for this client
			client->cHttpHeadersValid = true;
			client->cMandatoryHeadersCount = 0;

		} else if(headerLine->indexOf(':')) {
			String headerName = headerLine->substring(0, headerLine->indexOf(':'));
			String headerValue = headerLine->substring(headerLine->indexOf(':') + 1);

			// remove space in the beginning (RFC2616)
			if(headerValue[0] == ' ') {
				headerValue.remove(0, 1);
			}

			if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Connection"))) {
				headerValue.toLowerCase();
				if(headerValue.indexOf(WEBSOCKETS_STRING("upgrade")) >= 0) {
					client->cIsUpgrade = true;
				}
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Upgrade"))) {
				if(headerValue.equalsIgnoreCase(WEBSOCKETS_STRING("websocket"))) {
					client->cIsWebsocket = true;
				}
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Sec-WebSocket-Version"))) {
				client->cVersion = headerValue.toInt();
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Sec-WebSocket-Key"))) {
				client->cKey = headerValue;
				client->cKey.trim(); // see rfc6455
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Sec-WebSocket-Protocol"))) {
				client->cProtocol = headerValue;
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Sec-WebSocket-Extensions"))) {
				client->cExtensions = headerValue;
			} else if(headerName.equalsIgnoreCase(WEBSOCKETS_STRING("Authorization"))) {
				client->base64Authorization = headerValue;
			} else {
				client->cHttpHeadersValid &= execHttpHeaderValidation(headerName, headerValue);
				if(_mandatoryHttpHeaderCount > 0 && hasMandatoryHeader(headerName)) {
					client->cMandatoryHeadersCount++;
				}
			}

		} else {
			DEBUG_WEBSOCKETS("[WS-Client][handleHeader] Header error (%s)\n", headerLine->c_str());
		}