115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
package requestid
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import (
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"context"
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"net/textproto"
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"go.unistack.org/micro/v4/client"
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"go.unistack.org/micro/v4/logger"
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"go.unistack.org/micro/v4/metadata"
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"go.unistack.org/micro/v4/options"
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"go.unistack.org/micro/v4/server"
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"go.unistack.org/micro/v4/util/id"
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)
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func init() {
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logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs, func(ctx context.Context) []interface{} {
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if v, ok := ctx.Value(XRequestIDKey{}).(string); ok {
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return []interface{}{DefaultMetadataKey, v}
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}
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return nil
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})
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}
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type XRequestIDKey struct{}
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// DefaultMetadataKey contains metadata key x-request-id
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var DefaultMetadataKey = textproto.CanonicalMIMEHeaderKey("x-request-id")
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// DefaultMetadataFunc wil be used if user not provide own func to fill metadata
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var DefaultMetadataFunc = func(ctx context.Context) (context.Context, error) {
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var xid string
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var err error
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if _, ok := ctx.Value(XRequestIDKey{}).(string); !ok {
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xid, err = id.New()
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if err != nil {
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return ctx, err
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}
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ctx = context.WithValue(ctx, XRequestIDKey{}, xid)
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}
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imd, ok := metadata.FromIncomingContext(ctx)
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if !ok {
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imd = metadata.New(1)
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imd.Set(DefaultMetadataKey, xid)
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ctx = metadata.NewIncomingContext(ctx, imd)
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} else if _, ok = imd.Get(DefaultMetadataKey); !ok {
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imd.Set(DefaultMetadataKey, xid)
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}
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omd, ok := metadata.FromOutgoingContext(ctx)
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if !ok {
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omd = metadata.New(1)
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omd.Set(DefaultMetadataKey, xid)
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ctx = metadata.NewOutgoingContext(ctx, imd)
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} else if _, ok = omd.Get(DefaultMetadataKey); !ok {
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omd.Set(DefaultMetadataKey, xid)
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}
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return ctx, nil
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}
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type wrapper struct {
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client.Client
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}
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func NewClientWrapper() client.Wrapper {
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return func(c client.Client) client.Client {
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handler := &wrapper{
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Client: c,
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}
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return handler
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}
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}
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func NewClientCallWrapper() client.CallWrapper {
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return func(fn client.CallFunc) client.CallFunc {
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return func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
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var err error
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if ctx, err = DefaultMetadataFunc(ctx); err != nil {
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return err
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}
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return fn(ctx, addr, req, rsp, opts)
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}
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}
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}
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func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...options.Option) error {
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var err error
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if ctx, err = DefaultMetadataFunc(ctx); err != nil {
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return err
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}
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return w.Client.Call(ctx, req, rsp, opts...)
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}
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func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...options.Option) (client.Stream, error) {
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var err error
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if ctx, err = DefaultMetadataFunc(ctx); err != nil {
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return nil, err
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}
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return w.Client.Stream(ctx, req, opts...)
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}
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func NewServerHandlerWrapper() server.HandlerWrapper {
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return func(fn server.HandlerFunc) server.HandlerFunc {
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return func(ctx context.Context, req server.Request, rsp interface{}) error {
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var err error
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if ctx, err = DefaultMetadataFunc(ctx); err != nil {
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return err
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}
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return fn(ctx, req, rsp)
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}
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}
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}
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