grpc/client/client.go
Adphi 97ced73270
add metadata interceptors, auth client interceptors
Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
2022-03-11 12:33:18 +01:00

80 lines
2.3 KiB
Go

package client
import (
"context"
"crypto/tls"
"fmt"
"strings"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/resolver"
"go.linka.cloud/grpc/registry/noop"
)
type Client interface {
grpc.ClientConnInterface
}
func New(opts ...Option) (Client, error) {
c := &client{opts: &options{}}
for _, o := range opts {
o(c.opts)
}
if c.opts.registry == nil {
c.opts.registry = noop.New()
}
resolver.Register(c.opts.registry.ResolverBuilder())
c.pool = newPool(DefaultPoolSize, DefaultPoolTTL, DefaultPoolMaxIdle, DefaultPoolMaxStreams)
if c.opts.tlsConfig == nil && c.opts.Secure() {
c.opts.tlsConfig = &tls.Config{InsecureSkipVerify: true}
}
if c.opts.tlsConfig != nil {
c.opts.dialOptions = append(c.opts.dialOptions, grpc.WithTransportCredentials(credentials.NewTLS(c.opts.tlsConfig)))
}
if !c.opts.secure {
c.opts.dialOptions = append(c.opts.dialOptions, grpc.WithInsecure())
}
if len(c.opts.unaryInterceptors) > 0 {
c.opts.dialOptions = append(c.opts.dialOptions, grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(c.opts.unaryInterceptors...)))
}
if len(c.opts.streamInterceptors) > 0 {
c.opts.dialOptions = append(c.opts.dialOptions, grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(c.opts.streamInterceptors...)))
}
if c.opts.addr == "" {
c.addr = fmt.Sprintf("%s:///%s", c.opts.registry.String(), c.opts.name)
} else if strings.HasPrefix(c.opts.addr, "tcp://") {
c.addr = strings.Replace(c.opts.addr, "tcp://", "", 1)
} else {
c.addr = c.opts.addr
}
if c.opts.version != "" && c.opts.addr == "" {
c.addr = c.addr + ":" + strings.TrimSpace(c.opts.version)
}
return c, nil
}
type client struct {
addr string
pool *pool
opts *options
}
func (c *client) Invoke(ctx context.Context, method string, args interface{}, reply interface{}, opts ...grpc.CallOption) error {
pc, err := c.pool.getConn(c.addr, c.opts.dialOptions...)
if err != nil {
return err
}
return pc.Invoke(ctx, method, args, reply, opts...)
}
func (c *client) NewStream(ctx context.Context, desc *grpc.StreamDesc, method string, opts ...grpc.CallOption) (grpc.ClientStream, error) {
pc, err := c.pool.getConn(c.addr, c.opts.dialOptions...)
if err != nil {
return nil, err
}
return pc.NewStream(ctx, desc, method, opts...)
}