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Within LTS Haskell 24.46 (ghc-9.10.3)

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  1. setTimeout :: MonadSnap m => Int -> m ()

    snap-core Snap.Core

    Causes the handler thread to be killed n seconds from now.

  2. setContentLength :: Word64 -> Response -> Response

    snap-core Snap.Internal.Core

    A note here: if you want to set the Content-Length for the response, Snap forces you to do it with this function rather than by setting it in the headers; the Content-Length in the headers will be ignored. The reason for this is that Snap needs to look up the value of Content-Length for each request, and looking the string value up in the headers and parsing the number out of the text will be too expensive. If you don't set a content length in your response, HTTP keep-alive will be disabled for HTTP/1.0 clients, forcing a Connection: close. For HTTP/1.1 clients, Snap will switch to the chunked transfer encoding if Content-Length is not specified. Example:

    ghci> setContentLength 400 emptyResponse
    HTTP/1.1 200 OK
    Content-Length: 400
    

  3. setContentType :: ByteString -> Response -> Response

    snap-core Snap.Internal.Core

    Sets the Content-Type in the Response headers. Example:

    ghci> :set -XOverloadedStrings
    ghci> setContentType "text/html" emptyResponse
    HTTP/1.1 200 OK
    content-type: text/html
    

  4. setHeader :: HasHeaders a => CI ByteString -> ByteString -> a -> a

    snap-core Snap.Internal.Core

    Sets a header key-value-pair in a HasHeaders datatype. If a header with the same name already exists, it is overwritten with the new value. Example:

    ghci> import qualified Snap.Types.Headers as H
    ghci> setHeader "Host" "localhost" H.empty
    H {unH = [("host","localhost")]}
    ghci> setHeader "Host" "127.0.0.1" it
    H {unH = [("host","127.0.0.1")]}
    

  5. setResponseBody :: (OutputStream Builder -> IO (OutputStream Builder)) -> Response -> Response

    snap-core Snap.Internal.Core

    Sets an HTTP response body to the given stream procedure. Example:

    ghci> :set -XOverloadedStrings
    ghci> import qualified System.IO.Streams as Streams
    ghci> import qualified Data.ByteString.Builder as Builder
    ghci> :{
    ghci| let r = setResponseBody
    ghci|         (out -> do
    ghci|             Streams.write (Just $ Builder.byteString "Hello, world!") out
    ghci|             return out)
    ghci|         emptyResponse
    ghci| :}
    ghci> r
    HTTP/1.1 200 OK
    
    Hello, world!
    

  6. setResponseCode :: Int -> Response -> Response

    snap-core Snap.Internal.Core

    Sets the HTTP response code. Example:

    ghci> setResponseCode 404 emptyResponse
    HTTP/1.1 404 Not Found
    

  7. setResponseStatus :: Int -> ByteString -> Response -> Response

    snap-core Snap.Internal.Core

    Sets the HTTP response status. Note: normally you would use setResponseCode unless you needed a custom response explanation. Example:

    ghci> :set -XOverloadedStrings
    ghci> setResponseStatus 500 "Internal Server Error" emptyResponse
    HTTP/1.1 500 Internal Server Error
    

  8. setTimeout :: MonadSnap m => Int -> m ()

    snap-core Snap.Internal.Core

    Causes the handler thread to be killed n seconds from now.

  9. setContentLength :: Word64 -> Response -> Response

    snap-core Snap.Internal.Http.Types

    A note here: if you want to set the Content-Length for the response, Snap forces you to do it with this function rather than by setting it in the headers; the Content-Length in the headers will be ignored. The reason for this is that Snap needs to look up the value of Content-Length for each request, and looking the string value up in the headers and parsing the number out of the text will be too expensive. If you don't set a content length in your response, HTTP keep-alive will be disabled for HTTP/1.0 clients, forcing a Connection: close. For HTTP/1.1 clients, Snap will switch to the chunked transfer encoding if Content-Length is not specified. Example:

    ghci> setContentLength 400 emptyResponse
    HTTP/1.1 200 OK
    Content-Length: 400
    

  10. setContentType :: ByteString -> Response -> Response

    snap-core Snap.Internal.Http.Types

    Sets the Content-Type in the Response headers. Example:

    ghci> :set -XOverloadedStrings
    ghci> setContentType "text/html" emptyResponse
    HTTP/1.1 200 OK
    content-type: text/html
    

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