To compress the message payload, select the desired compression algorithm from the drop down box, as indicated below by the blue arrow.
要压缩消息有效负载，请从下拉框中选择所需的压缩算法，如下面的蓝色箭头所示。
Theoretically new compression providers can also include encryption, but no such providers are included out of the box.
理论上，新的压缩提供器也能包含加密功能，不过类似的提供器还没有直接内置。
To enable header compression, select the Compress message headers box, as indicated in the figure by the red arrow.
要启用标题压缩，请选中 Compress message headers 框，如图中红色箭头所示。
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