82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
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package server
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import (
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"fmt"
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"io"
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"strings"
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"git.loafle.net/commons_go/rpc"
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"git.loafle.net/commons_go/rpc/protocol"
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)
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type ServerHandlers struct {
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Registry rpc.Registry
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codecs map[string]protocol.ServerCodec
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}
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// RegisterCodec adds a new codec to the server.
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//
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// Codecs are defined to process a given serialization scheme, e.g., JSON or
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// XML. A codec is chosen based on the "Content-Type" header from the request,
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// excluding the charset definition.
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func (sh *ServerHandlers) RegisterCodec(codec protocol.ServerCodec, contentType string) {
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if nil == sh.codecs {
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sh.codecs = make(map[string]protocol.ServerCodec)
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}
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sh.codecs[strings.ToLower(contentType)] = codec
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}
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func (sh *ServerHandlers) GetContentType(r io.Reader) string {
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return ""
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}
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func (sh *ServerHandlers) OnPreRead(r io.Reader) {
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// no op
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}
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func (sh *ServerHandlers) OnPostRead(r io.Reader) {
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// no op
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}
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func (sh *ServerHandlers) OnPreWriteResult(w io.Writer, result interface{}) {
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// no op
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}
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func (sh *ServerHandlers) OnPostWriteResult(w io.Writer, result interface{}) {
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// no op
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}
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func (sh *ServerHandlers) OnPreWriteError(w io.Writer, err error) {
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// no op
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}
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func (sh *ServerHandlers) OnPostWriteError(w io.Writer, err error) {
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// no op
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}
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func (sh *ServerHandlers) Validate() {
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if nil == sh.Registry {
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panic("Registry(RPCRegistry) must be specified.")
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}
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}
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func (sh *ServerHandlers) getCodec(contentType string) (protocol.ServerCodec, error) {
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var codec protocol.ServerCodec
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if contentType == "" && len(sh.codecs) == 1 {
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// If Content-Type is not set and only one codec has been registered,
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// then default to that codec.
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for _, c := range sh.codecs {
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codec = c
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}
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} else if codec = sh.codecs[strings.ToLower(contentType)]; codec == nil {
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return nil, fmt.Errorf("Unrecognized Content-Type: %s", contentType)
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}
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return codec, nil
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}
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func (sh *ServerHandlers) invoke(codec protocol.RegistryCodec) (result interface{}, err error) {
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return sh.Registry.Invoke(codec)
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}
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