编辑“︁NetworkDesign”︁（章节）

==== 静态内容传输 ====

Perceptions are about dynamic content. But most games have some static data, too. Like maps, tilesets, sounds. The RPManager keeps track of situation in which the client might need some of this static data. A common case is the movement of the client from one zone to another.

If the RPManager detects such a situation, it will offer the new content to the client using a [https://sourceforge.net/p/arianne/marauroa/ci/master/tree/src/marauroa/common/net/message/MessageS2CTransferREQ.java S2CTransferREQ] message. The message is composed of an array of [https://sourceforge.net/p/arianne/marauroa/ci/master/tree/src/marauroa/common/net/message/TransferContent.java TransferContent] objects containing the name of each resource, its timestamp (or checksum) and if the resource is cacheable or not.

The clients replies with a [https://sourceforge.net/p/arianne/marauroa/ci/master/tree/src/marauroa/common/net/message/MessageC2STransferACK.java C2STransferACK] acknowledging the offer. The message is composed of an array of TransferContent objects containing all the name of each resource and a flag indicating ack or not. Note: The C2STransferACK message is always sent, even if all flags indicate that no transfer should take place.

If the clients has acknowledged the need for content to be transfer, the server sends a [https://sourceforge.net/p/arianne/marauroa/ci/master/tree/src/marauroa/common/net/message/MessageS2CTransfer.java S2CTransfer]. The message contains a again an an array of TransferContent objects. This time, however, the actual data is included as well.