序
本文主要研究一下dubbo-go的TokenFilter
TokenFilter
dubbo-go-v1.4.2/filter/filter_impl/token_filter.go
代码语言:javascript复制const (
// TOKEN ...
TOKEN = "token"
)
func init() {
extension.SetFilter(TOKEN, GetTokenFilter)
}
// TokenFilter ...
type TokenFilter struct{}
- TokenFilter的init方法设置了GetTokenFilter
GetTokenFilter
dubbo-go-v1.4.2/filter/filter_impl/token_filter.go
代码语言:javascript复制// GetTokenFilter ...
func GetTokenFilter() filter.Filter {
return &TokenFilter{}
}
- GetTokenFilter创建了TokenFilter
Invoke
dubbo-go-v1.4.2/filter/filter_impl/token_filter.go
代码语言:javascript复制// Invoke ...
func (tf *TokenFilter) Invoke(ctx context.Context, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
invokerTkn := invoker.GetUrl().GetParam(constant.TOKEN_KEY, "")
if len(invokerTkn) > 0 {
attachs := invocation.Attachments()
remoteTkn, exist := attachs[constant.TOKEN_KEY]
if exist && strings.EqualFold(invokerTkn, remoteTkn) {
return invoker.Invoke(ctx, invocation)
}
return &protocol.RPCResult{Err: perrors.Errorf("Invalid token! Forbid invoke remote service %v method %s ",
invoker, invocation.MethodName())}
}
return invoker.Invoke(ctx, invocation)
}
- Invoke方法读取constant.TOKEN_KEY的值invokerTkn,在该值有配置的前提下,从invocation.Attachments()获取对应的remoteTkn,之后对比invokerTkn与remoteTkn,相等则执行invoker.Invoke(ctx, invocation),否则返回错误结果
OnResponse
dubbo-go-v1.4.2/filter/filter_impl/token_filter.go
代码语言:javascript复制// OnResponse ...
func (tf *TokenFilter) OnResponse(ctx context.Context, result protocol.Result, invoker protocol.Invoker, invocation protocol.Invocation) protocol.Result {
return result
}
- OnResponse方法这里直接返回result
小结
TokenFilter的Invoke方法读取constant.TOKEN_KEY的值invokerTkn,在该值有配置的前提下,从invocation.Attachments()获取对应的remoteTkn,之后对比invokerTkn与remoteTkn,相等则执行invoker.Invoke(ctx, invocation),否则返回错误结果
doc
- token_filter