723 lines
16 KiB
Go
723 lines
16 KiB
Go
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// Package drpc provides a drpc client
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package drpc
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import (
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"context"
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"fmt"
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"net"
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"strings"
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"sync"
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"time"
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"github.com/unistack-org/micro/v3/broker"
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"github.com/unistack-org/micro/v3/client"
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"github.com/unistack-org/micro/v3/codec"
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"github.com/unistack-org/micro/v3/errors"
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"github.com/unistack-org/micro/v3/metadata"
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"storj.io/drpc/drpcconn"
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dmetadata "storj.io/drpc/drpcmetadata"
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)
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var (
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DefaultContentType = "application/drpc+proto"
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)
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type drpcClient struct {
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opts client.Options
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//pool *pool
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init bool
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sync.RWMutex
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}
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func (d *drpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
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var header map[string]string
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if md, ok := metadata.FromOutgoingContext(ctx); ok {
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header = make(map[string]string, len(md))
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for k, v := range md {
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header[strings.ToLower(k)] = v
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}
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} else {
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header = make(map[string]string, 2)
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}
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// set timeout in nanoseconds
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header[metadata.HeaderTimeout] = fmt.Sprintf("%d", opts.RequestTimeout)
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// set the content type for the request
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// header["x-content-type"] = req.ContentType()
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ctx = dmetadata.AddPairs(ctx, header)
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cf, err := d.newCodec(req.ContentType())
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if err != nil {
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return errors.InternalServerError("go.micro.client", err.Error())
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}
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//maxRecvMsgSize := d.maxRecvMsgSizeValue()
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//maxSendMsgSize := d.maxSendMsgSizeValue()
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var grr error
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var dialCtx context.Context
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var cancel context.CancelFunc
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if opts.DialTimeout >= 0 {
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dialCtx, cancel = context.WithTimeout(ctx, opts.DialTimeout)
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} else {
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dialCtx, cancel = context.WithCancel(ctx)
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}
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defer cancel()
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// TODO: handle g.secure
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/*
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grpcDialOptions := []grpc.DialOption{
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g.secure(addr),
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grpc.WithDefaultCallOptions(
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grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
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grpc.MaxCallSendMsgSize(maxSendMsgSize),
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),
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}
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if opts := g.getGrpcDialOptions(); opts != nil {
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grpcDialOptions = append(grpcDialOptions, opts...)
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}
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cc, err := g.pool.getConn(dialCtx, addr, grpcDialOptions...)
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if err != nil {
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return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
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}
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defer func() {
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// defer execution of release
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g.pool.release(cc, grr)
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}()
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*/
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ch := make(chan error, 1)
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_ = dialCtx
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//rc, err := net.DialContext(ctx, "tcp", addr)
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rc, err := net.Dial("tcp", addr)
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if err != nil {
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return err
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}
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defer rc.Close()
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cc := drpcconn.New(rc)
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defer cc.Close()
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go func() {
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err := cc.Invoke(ctx, methodToDRPC(req.Service(), req.Endpoint()), &wrapMicroCodec{cf}, req.Body(), rsp)
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ch <- microError(err)
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}()
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select {
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case err := <-ch:
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grr = err
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case <-ctx.Done():
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grr = errors.Timeout("go.micro.client", "%v", ctx.Err())
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}
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return grr
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}
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/*
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func (g *drpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
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var header map[string]string
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if md, ok := metadata.FromOutgoingContext(ctx); ok {
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header = make(map[string]string, len(md))
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for k, v := range md {
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header[k] = v
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}
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} else {
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header = make(map[string]string)
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}
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// set timeout in nanoseconds
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if opts.StreamTimeout > time.Duration(0) {
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header["timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
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}
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// set the content type for the request
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header["x-content-type"] = req.ContentType()
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md := gmetadata.New(header)
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ctx = gmetadata.NewOutgoingContext(ctx, md)
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cf, err := g.newCodec(req.ContentType())
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if err != nil {
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return errors.InternalServerError("go.micro.client", err.Error())
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}
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var dialCtx context.Context
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var cancel context.CancelFunc
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if opts.DialTimeout >= 0 {
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dialCtx, cancel = context.WithTimeout(ctx, opts.DialTimeout)
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} else {
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dialCtx, cancel = context.WithCancel(ctx)
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}
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defer cancel()
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grpcDialOptions := []grpc.DialOption{
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// g.secure(addr),
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}
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if opts := g.getGrpcDialOptions(); opts != nil {
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grpcDialOptions = append(grpcDialOptions, opts...)
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}
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cc, err := g.pool.getConn(dialCtx, addr, grpcDialOptions...)
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if err != nil {
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return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
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}
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desc := &grpc.StreamDesc{
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StreamName: req.Service() + req.Endpoint(),
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ClientStreams: true,
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ServerStreams: true,
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}
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grpcCallOptions := []grpc.CallOption{
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grpc.ForceCodec(cf),
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grpc.CallContentSubtype(cf.String()),
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}
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if opts := g.getGrpcCallOptions(); opts != nil {
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grpcCallOptions = append(grpcCallOptions, opts...)
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}
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// create a new cancelling context
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newCtx, cancel := context.WithCancel(ctx)
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st, err := cc.NewStream(newCtx, desc, methodToGRPC(req.Service(), req.Endpoint()), grpcCallOptions...)
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if err != nil {
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// we need to cleanup as we dialled and created a context
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// cancel the context
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cancel()
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// release the connection
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g.pool.release(cc, err)
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// now return the error
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return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
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}
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// set request codec
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if r, ok := req.(*grpcRequest); ok {
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r.codec = cf
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}
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// setup the stream response
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stream := &grpcStream{
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ClientStream: st,
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context: ctx,
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request: req,
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response: &response{
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conn: cc,
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stream: st,
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codec: cf,
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},
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conn: cc,
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close: func(err error) {
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// cancel the context if an error occurred
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if err != nil {
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cancel()
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}
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// defer execution of release
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g.pool.release(cc, err)
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},
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}
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// set the stream as the response
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val := reflect.ValueOf(rsp).Elem()
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val.Set(reflect.ValueOf(stream).Elem())
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return nil
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}
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func (g *drpcClient) poolMaxStreams() int {
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if g.opts.Context == nil {
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return DefaultPoolMaxStreams
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}
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v := g.opts.Context.Value(poolMaxStreams{})
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if v == nil {
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return DefaultPoolMaxStreams
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}
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return v.(int)
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}
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func (g *drpcClient) poolMaxIdle() int {
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if g.opts.Context == nil {
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return DefaultPoolMaxIdle
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}
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v := g.opts.Context.Value(poolMaxIdle{})
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if v == nil {
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return DefaultPoolMaxIdle
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}
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return v.(int)
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}
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func (g *drpcClient) maxRecvMsgSizeValue() int {
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if g.opts.Context == nil {
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return DefaultMaxRecvMsgSize
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}
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v := g.opts.Context.Value(maxRecvMsgSizeKey{})
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if v == nil {
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return DefaultMaxRecvMsgSize
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}
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return v.(int)
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}
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func (g *drpcClient) maxSendMsgSizeValue() int {
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if g.opts.Context == nil {
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return DefaultMaxSendMsgSize
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}
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v := g.opts.Context.Value(maxSendMsgSizeKey{})
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if v == nil {
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return DefaultMaxSendMsgSize
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}
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return v.(int)
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}
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*/
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func (d *drpcClient) newCodec(ct string) (codec.Codec, error) {
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d.RLock()
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defer d.RUnlock()
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if idx := strings.IndexRune(ct, ';'); idx >= 0 {
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ct = ct[:idx]
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}
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if c, ok := d.opts.Codecs[ct]; ok {
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return c, nil
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}
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return nil, codec.ErrUnknownContentType
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}
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func (d *drpcClient) Init(opts ...client.Option) error {
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if len(opts) == 0 && d.init {
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return nil
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}
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// size := d.opts.PoolSize
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// ttl := d.opts.PoolTTL
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for _, o := range opts {
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o(&d.opts)
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}
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/*
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// update pool configuration if the options changed
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if size != d.opts.PoolSize || ttl != d.opts.PoolTTL {
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d.pool.Lock()
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d.pool.size = d.opts.PoolSize
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d.pool.ttl = int64(d.opts.PoolTTL.Seconds())
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d.pool.Unlock()
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}
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*/
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if err := d.opts.Broker.Init(); err != nil {
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return err
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}
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if err := d.opts.Tracer.Init(); err != nil {
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return err
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}
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if err := d.opts.Router.Init(); err != nil {
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return err
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}
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if err := d.opts.Logger.Init(); err != nil {
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return err
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}
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if err := d.opts.Meter.Init(); err != nil {
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return err
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}
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if err := d.opts.Transport.Init(); err != nil {
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return err
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}
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d.init = true
|
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||
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return nil
|
||
|
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}
|
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|
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|
||
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func (d *drpcClient) Options() client.Options {
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return d.opts
|
||
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}
|
||
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|
||
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func (d *drpcClient) NewMessage(topic string, msg interface{}, opts ...client.MessageOption) client.Message {
|
||
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return newDRPCEvent(topic, msg, d.opts.ContentType, opts...)
|
||
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}
|
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|
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|
||
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func (d *drpcClient) NewRequest(service, method string, req interface{}, reqOpts ...client.RequestOption) client.Request {
|
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return newDRPCRequest(service, method, req, d.opts.ContentType, reqOpts...)
|
||
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}
|
||
|
|
|
||
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func (d *drpcClient) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
|
||
|
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if req == nil {
|
||
|
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return errors.InternalServerError("go.micro.client", "req is nil")
|
||
|
|
} else if rsp == nil {
|
||
|
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return errors.InternalServerError("go.micro.client", "rsp is nil")
|
||
|
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}
|
||
|
|
// make a copy of call opts
|
||
|
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callOpts := d.opts.CallOptions
|
||
|
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for _, opt := range opts {
|
||
|
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opt(&callOpts)
|
||
|
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}
|
||
|
|
|
||
|
|
// check if we already have a deadline
|
||
|
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td, ok := ctx.Deadline()
|
||
|
|
if !ok {
|
||
|
|
// no deadline so we create a new one
|
||
|
|
var cancel context.CancelFunc
|
||
|
|
ctx, cancel = context.WithTimeout(ctx, callOpts.RequestTimeout)
|
||
|
|
defer cancel()
|
||
|
|
} else {
|
||
|
|
// got a deadline so no need to setup context
|
||
|
|
// but we need to set the timeout we pass along
|
||
|
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opt := client.WithRequestTimeout(time.Until(td))
|
||
|
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opt(&callOpts)
|
||
|
|
}
|
||
|
|
|
||
|
|
// should we noop right here?
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
|
||
|
|
// make copy of call method
|
||
|
|
dcall := d.call
|
||
|
|
|
||
|
|
// wrap the call in reverse
|
||
|
|
for i := len(callOpts.CallWrappers); i > 0; i-- {
|
||
|
|
dcall = callOpts.CallWrappers[i-1](dcall)
|
||
|
|
}
|
||
|
|
|
||
|
|
// use the router passed as a call option, or fallback to the rpc clients router
|
||
|
|
if callOpts.Router == nil {
|
||
|
|
callOpts.Router = d.opts.Router
|
||
|
|
}
|
||
|
|
|
||
|
|
if callOpts.Selector == nil {
|
||
|
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callOpts.Selector = d.opts.Selector
|
||
|
|
}
|
||
|
|
|
||
|
|
// inject proxy address
|
||
|
|
// TODO: don't even bother using Lookup/Select in this case
|
||
|
|
if len(d.opts.Proxy) > 0 {
|
||
|
|
callOpts.Address = []string{d.opts.Proxy}
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookup the route to send the reques to
|
||
|
|
// TODO apply any filtering here
|
||
|
|
routes, err := d.opts.Lookup(ctx, req, callOpts)
|
||
|
|
if err != nil {
|
||
|
|
return errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
|
||
|
|
// balance the list of nodes
|
||
|
|
next, err := callOpts.Selector.Select(routes)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// return errors.New("go.micro.client", "request timeout", 408)
|
||
|
|
call := func(i int) error {
|
||
|
|
// call backoff first. Someone may want an initial start delay
|
||
|
|
t, err := callOpts.Backoff(ctx, req, i)
|
||
|
|
if err != nil {
|
||
|
|
return errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
|
||
|
|
// only sleep if greater than 0
|
||
|
|
if t.Seconds() > 0 {
|
||
|
|
time.Sleep(t)
|
||
|
|
}
|
||
|
|
|
||
|
|
// get the next node
|
||
|
|
node := next()
|
||
|
|
|
||
|
|
// make the call
|
||
|
|
err = dcall(ctx, node, req, rsp, callOpts)
|
||
|
|
|
||
|
|
// record the result of the call to inform future routing decisions
|
||
|
|
if verr := d.opts.Selector.Record(node, err); verr != nil {
|
||
|
|
return verr
|
||
|
|
}
|
||
|
|
|
||
|
|
// try and transform the error to a go-micro error
|
||
|
|
if verr, ok := err.(*errors.Error); ok {
|
||
|
|
return verr
|
||
|
|
}
|
||
|
|
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
ch := make(chan error, callOpts.Retries+1)
|
||
|
|
var derr error
|
||
|
|
|
||
|
|
for i := 0; i <= callOpts.Retries; i++ {
|
||
|
|
go func(i int) {
|
||
|
|
ch <- call(i)
|
||
|
|
}(i)
|
||
|
|
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
|
||
|
|
case err := <-ch:
|
||
|
|
// if the call succeeded lets bail early
|
||
|
|
if err == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
retry, rerr := callOpts.Retry(ctx, req, i, err)
|
||
|
|
if rerr != nil {
|
||
|
|
return rerr
|
||
|
|
}
|
||
|
|
|
||
|
|
if !retry {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
derr = err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return derr
|
||
|
|
}
|
||
|
|
|
||
|
|
func (g *drpcClient) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
|
||
|
|
return nil, nil
|
||
|
|
/*
|
||
|
|
// make a copy of call opts
|
||
|
|
callOpts := g.opts.CallOptions
|
||
|
|
for _, opt := range opts {
|
||
|
|
opt(&callOpts)
|
||
|
|
}
|
||
|
|
|
||
|
|
// #200 - streams shouldn't have a request timeout set on the context
|
||
|
|
|
||
|
|
// should we noop right here?
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
|
||
|
|
// make a copy of stream
|
||
|
|
gstream := g.stream
|
||
|
|
|
||
|
|
// wrap the call in reverse
|
||
|
|
for i := len(callOpts.CallWrappers); i > 0; i-- {
|
||
|
|
gstream = callOpts.CallWrappers[i-1](gstream)
|
||
|
|
}
|
||
|
|
|
||
|
|
// use the router passed as a call option, or fallback to the rpc clients router
|
||
|
|
if callOpts.Router == nil {
|
||
|
|
callOpts.Router = g.opts.Router
|
||
|
|
}
|
||
|
|
|
||
|
|
if callOpts.Selector == nil {
|
||
|
|
callOpts.Selector = g.opts.Selector
|
||
|
|
}
|
||
|
|
|
||
|
|
// inject proxy address
|
||
|
|
// TODO: don't even bother using Lookup/Select in this case
|
||
|
|
if len(g.opts.Proxy) > 0 {
|
||
|
|
callOpts.Address = []string{g.opts.Proxy}
|
||
|
|
}
|
||
|
|
|
||
|
|
// lookup the route to send the reques to
|
||
|
|
// TODO: move to internal lookup func
|
||
|
|
routes, err := g.opts.Lookup(ctx, req, callOpts)
|
||
|
|
if err != nil {
|
||
|
|
return nil, errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
|
||
|
|
// balance the list of nodes
|
||
|
|
next, err := callOpts.Selector.Select(routes)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
call := func(i int) (client.Stream, error) {
|
||
|
|
// call backoff first. Someone may want an initial start delay
|
||
|
|
t, err := callOpts.Backoff(ctx, req, i)
|
||
|
|
if err != nil {
|
||
|
|
return nil, errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
|
||
|
|
// only sleep if greater than 0
|
||
|
|
if t.Seconds() > 0 {
|
||
|
|
time.Sleep(t)
|
||
|
|
}
|
||
|
|
|
||
|
|
// get the next node
|
||
|
|
node := next()
|
||
|
|
|
||
|
|
// make the call
|
||
|
|
stream := &grpcStream{}
|
||
|
|
err = gstream(ctx, node, req, stream, callOpts)
|
||
|
|
|
||
|
|
// record the result of the call to inform future routing decisions
|
||
|
|
if verr := g.opts.Selector.Record(node, err); verr != nil {
|
||
|
|
return nil, verr
|
||
|
|
}
|
||
|
|
|
||
|
|
// try and transform the error to a go-micro error
|
||
|
|
if verr, ok := err.(*errors.Error); ok {
|
||
|
|
return nil, verr
|
||
|
|
}
|
||
|
|
|
||
|
|
if rerr := g.opts.Selector.Record(node, err); rerr != nil {
|
||
|
|
return nil, rerr
|
||
|
|
}
|
||
|
|
|
||
|
|
return stream, err
|
||
|
|
}
|
||
|
|
|
||
|
|
type response struct {
|
||
|
|
stream client.Stream
|
||
|
|
err error
|
||
|
|
}
|
||
|
|
|
||
|
|
ch := make(chan response, callOpts.Retries+1)
|
||
|
|
var grr error
|
||
|
|
|
||
|
|
for i := 0; i <= callOpts.Retries; i++ {
|
||
|
|
go func(i int) {
|
||
|
|
s, err := call(i)
|
||
|
|
ch <- response{s, err}
|
||
|
|
}(i)
|
||
|
|
|
||
|
|
select {
|
||
|
|
case <-ctx.Done():
|
||
|
|
return nil, errors.New("go.micro.client", fmt.Sprintf("%v", ctx.Err()), 408)
|
||
|
|
case rsp := <-ch:
|
||
|
|
// if the call succeeded lets bail early
|
||
|
|
if rsp.err == nil {
|
||
|
|
return rsp.stream, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
retry, rerr := callOpts.Retry(ctx, req, i, grr)
|
||
|
|
if rerr != nil {
|
||
|
|
return nil, rerr
|
||
|
|
}
|
||
|
|
|
||
|
|
if !retry {
|
||
|
|
return nil, rsp.err
|
||
|
|
}
|
||
|
|
|
||
|
|
grr = rsp.err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil, grr
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *drpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
|
||
|
|
var body []byte
|
||
|
|
|
||
|
|
options := client.NewPublishOptions(opts...)
|
||
|
|
|
||
|
|
md, ok := metadata.FromOutgoingContext(ctx)
|
||
|
|
if !ok {
|
||
|
|
md = metadata.New(2)
|
||
|
|
}
|
||
|
|
md[metadata.HeaderContentType] = p.ContentType()
|
||
|
|
md[metadata.HeaderTopic] = p.Topic()
|
||
|
|
|
||
|
|
// passed in raw data
|
||
|
|
if d, ok := p.Payload().(*codec.Frame); ok {
|
||
|
|
body = d.Data
|
||
|
|
} else {
|
||
|
|
// use codec for payload
|
||
|
|
cf, err := c.newCodec(p.ContentType())
|
||
|
|
if err != nil {
|
||
|
|
return errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
// set the body
|
||
|
|
b, err := cf.Marshal(p.Payload())
|
||
|
|
if err != nil {
|
||
|
|
return errors.InternalServerError("go.micro.client", err.Error())
|
||
|
|
}
|
||
|
|
body = b
|
||
|
|
}
|
||
|
|
|
||
|
|
topic := p.Topic()
|
||
|
|
|
||
|
|
// get the exchange
|
||
|
|
if len(options.Exchange) > 0 {
|
||
|
|
topic = options.Exchange
|
||
|
|
}
|
||
|
|
|
||
|
|
return c.opts.Broker.Publish(metadata.NewOutgoingContext(ctx, md), topic, &broker.Message{
|
||
|
|
Header: md,
|
||
|
|
Body: body,
|
||
|
|
},
|
||
|
|
broker.PublishContext(options.Context),
|
||
|
|
broker.PublishBodyOnly(options.BodyOnly),
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *drpcClient) String() string {
|
||
|
|
return "drpc"
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *drpcClient) Name() string {
|
||
|
|
return d.opts.Name
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
func (g *drpcClient) getGrpcDialOptions() []grpc.DialOption {
|
||
|
|
if g.opts.CallOptions.Context == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
v := g.opts.CallOptions.Context.Value(grpcDialOptions{})
|
||
|
|
|
||
|
|
if v == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
opts, ok := v.([]grpc.DialOption)
|
||
|
|
|
||
|
|
if !ok {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
return opts
|
||
|
|
}
|
||
|
|
|
||
|
|
func (g *drpcClient) getGrpcCallOptions() []grpc.CallOption {
|
||
|
|
if g.opts.CallOptions.Context == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
v := g.opts.CallOptions.Context.Value(grpcCallOptions{})
|
||
|
|
|
||
|
|
if v == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
opts, ok := v.([]grpc.CallOption)
|
||
|
|
|
||
|
|
if !ok {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
return opts
|
||
|
|
}
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
func NewClient(opts ...client.Option) client.Client {
|
||
|
|
options := client.NewOptions(opts...)
|
||
|
|
// default content type for grpc
|
||
|
|
options.ContentType = DefaultContentType
|
||
|
|
|
||
|
|
rc := &drpcClient{
|
||
|
|
opts: options,
|
||
|
|
}
|
||
|
|
|
||
|
|
c := client.Client(rc)
|
||
|
|
|
||
|
|
// wrap in reverse
|
||
|
|
for i := len(options.Wrappers); i > 0; i-- {
|
||
|
|
c = options.Wrappers[i-1](c)
|
||
|
|
}
|
||
|
|
|
||
|
|
return c
|
||
|
|
}
|