pub enum Action {
    Close,
    UpgradeTls,
    NoReply,
    Reply,
}
Expand description
Action indicates the recommended action to take on a response
Send the response and close the connection
Upgrade the connection to use TLS
Do not reply, wait for the client to send more data
Send a reply and keep the connection open
Performs copy-assignment from 
source. 
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Formats the value using the given formatter. 
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This method tests for self and other values to be equal, and is used
by ==.
This method tests for !=. The default implementation is almost always
sufficient, and should not be overridden without very good reason.
Immutably borrows from an owned value. 
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Mutably borrows from an owned value. 
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Returns the argument unchanged.
Calls U::from(self).
That is, this conversion is whatever the implementation of
From<T> for U chooses to do.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. 
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Uses borrowed data to replace owned data, usually by cloning. 
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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.