The Foo application will request services from the Bar application and expect replies.
Foo应用程序将请求Bar应用程序中的服务，并期望获得回复。
The request is opened using POST instead of GET, and the Content-Type header is set to let the server know what sort of data it should expect.
请求使用POST而非GET打开，而且Content - type头被设置为让服务器预知它能得到何种数据。
The request is opened using POST instead of GET, and the Content-Type header is set to let the server know what sort of data it should expect.
请求使用POST而非GET打开，而且Content - type头被设置为让服务器预知它能得到何种数据。
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