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42 lines
1.3 KiB
42 lines
1.3 KiB
package encoding |
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import ( |
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"strings" |
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) |
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// Codec defines the interface Transport uses to encode and decode messages. Note |
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// that implementations of this interface must be thread safe; a Codec's |
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// methods can be called from concurrent goroutines. |
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type Codec interface { |
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// Marshal returns the wire format of v. |
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Marshal(v interface{}) ([]byte, error) |
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// Unmarshal parses the wire format into v. |
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Unmarshal(data []byte, v interface{}) error |
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// Name returns the name of the Codec implementation. The returned string |
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// will be used as part of content type in transmission. The result must be |
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// static; the result cannot change between calls. |
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Name() string |
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} |
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var registeredCodecs = make(map[string]Codec) |
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// RegisterCodec registers the provided Codec for use with all Transport clients and |
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// servers. |
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func RegisterCodec(codec Codec) { |
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if codec == nil { |
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panic("cannot register a nil Codec") |
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} |
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if codec.Name() == "" { |
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panic("cannot register Codec with empty string result for Name()") |
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} |
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contentSubtype := strings.ToLower(codec.Name()) |
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registeredCodecs[contentSubtype] = codec |
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} |
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// GetCodec gets a registered Codec by content-subtype, or nil if no Codec is |
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// registered for the content-subtype. |
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// |
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// The content-subtype is expected to be lowercase. |
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func GetCodec(contentSubtype string) Codec { |
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return registeredCodecs[contentSubtype] |
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}
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