聊聊dubbogo的TokenFilter

编程

本文主要研究一下dubbo-go的TokenFilter

TokenFilter

dubbo-go-v1.4.2/filter/filter_impl/token_filter.go

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

// GetTokenFilter ...

func GetTokenFilter() filter.Filter {

return &TokenFilter{}

}

  • GetTokenFilter创建了TokenFilter

Invoke

dubbo-go-v1.4.2/filter/filter_impl/token_filter.go

// 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

// 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

以上是 聊聊dubbogo的TokenFilter 的全部内容, 来源链接: utcz.com/z/518473.html

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