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64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package component
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import (
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"git.noahlan.cn/northlan/nnet/nface"
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"reflect"
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"unicode"
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"unicode/utf8"
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)
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var (
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typeOfError = reflect.TypeOf((*error)(nil)).Elem()
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typeOfBytes = reflect.TypeOf(([]byte)(nil))
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typeOfConnection = reflect.TypeOf((nface.IConnection)(nil))
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)
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func isExported(name string) bool {
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w, _ := utf8.DecodeRuneInString(name)
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return unicode.IsUpper(w)
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}
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func isExportedOrBuiltinType(t reflect.Type) bool {
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for t.Kind() == reflect.Ptr {
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t = t.Elem()
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}
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// PkgPath will be non-empty even for an exported type,
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// so we need to check the type name as well.
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return isExported(t.Name()) || t.PkgPath() == ""
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}
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func isHandlerMethod(method reflect.Method) bool {
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mt := method.Type
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// 必须是可导出的
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if isExportedOrBuiltinType(mt) {
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return false
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}
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// 必须具有3个入参: receiver, *Request, []byte/pointer
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// receiver指代 func (*receiver) xxx() 的receiver部分
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if mt.NumIn() != 3 {
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return false
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}
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// 至少要有一个出参 且是error
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if mt.NumOut() < 1 {
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return false
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}
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// 第一个显式入参必须是实现了IConnection的具体类的指针类型
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if t1 := mt.In(1); t1.Kind() != reflect.Ptr || t1 != typeOfConnection {
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return false
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}
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// 第二个显式入参必须是 []byte 或者 任意pointer
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if t2 := mt.In(2); t2.Kind() != reflect.Ptr || t2 != typeOfBytes {
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return false
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}
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// 最后一个出参必须是error
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if o1 := mt.Out(mt.NumOut() - 1); o1 != typeOfError {
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return false
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}
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return true
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}
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