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conn.go
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conn.go
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package service
import (
"context"
"crypto/tls"
"errors"
"net"
"net/http"
"strings"
"sync"
"time"
"github.com/andrescosta/goico/pkg/env"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/timeout"
rpc "google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/test/bufconn"
)
var (
netConn = NetConn{}
DefaultGrpcDialer = netConn
DefaultGrpcListener = netConn
DefaultHTTPListener = netConn
DefaultHTTPClient = netConn
)
var ErrEmptyAddress = errors.New("address is empty")
type (
GrpcDialer interface {
Dial(ctx context.Context, addr string, o ...rpc.DialOption) (*rpc.ClientConn, error)
}
GrpcListener interface {
Listen(addr string) (net.Listener, error)
}
HTTPListener interface {
Listen(addr string) (net.Listener, error)
}
HTTPTranporter interface {
Tranport(addr string) (*http.Transport, error)
}
HTTPClientBuilder interface {
NewHTTPClient(addr string) (*http.Client, error)
}
)
type GrpcConn struct {
Dialer GrpcDialer
Listener GrpcListener
}
type HTTPConn struct {
ClientBuilder HTTPClientBuilder
Listener HTTPListener
}
func (s HTTPConn) ClientBuilderOrDefault() HTTPClientBuilder {
if s.ClientBuilder == nil {
return DefaultHTTPClient
}
return s.ClientBuilder
}
func (s HTTPConn) ListenerOrDefault() HTTPListener {
if s.Listener == nil {
return DefaultHTTPListener
}
return s.Listener
}
type NetConn struct{}
func (NetConn) Dial(_ context.Context, addr string, _ ...rpc.DialOption) (*rpc.ClientConn, error) {
if addr == "" {
return nil, ErrEmptyAddress
}
var creds credentials.TransportCredentials
if strings.HasSuffix(addr, ":443") {
creds = credentials.NewTLS(&tls.Config{MinVersion: tls.VersionTLS12})
} else {
creds = insecure.NewCredentials()
}
c, err := rpc.Dial(addr, rpc.WithTransportCredentials(creds))
if err != nil {
return nil, err
}
return c, nil
}
func (NetConn) Listen(addr string) (net.Listener, error) {
return net.Listen("tcp", addr)
}
func (NetConn) NewHTTPClient(_ string) (*http.Client, error) {
transport := http.DefaultTransport
return &http.Client{
Timeout: 1 * time.Second,
Transport: transport,
}, nil
}
type BufConn struct {
timeout time.Duration
mu *sync.Mutex
listeners map[string]*bufconn.Listener
}
func NewBufConn() *BufConn {
return NewBufConnWithTimeout(*env.Duration("dial.timeout"))
}
func NewBufConnWithTimeout(timeout time.Duration) *BufConn {
return &BufConn{
timeout: timeout,
listeners: make(map[string]*bufconn.Listener),
mu: &sync.Mutex{},
}
}
func (t *BufConn) Dial(_ context.Context, addr string, _ ...rpc.DialOption) (*rpc.ClientConn, error) {
if addr == "" {
return nil, ErrEmptyAddress
}
l := t.listenerFor(addr)
ctxDialerOp := rpc.WithContextDialer(func(ctx context.Context, _ string) (net.Conn, error) { return l.DialContext(ctx) })
timeOutOp := rpc.WithUnaryInterceptor(
timeout.UnaryClientInterceptor(t.timeout),
)
c, err := rpc.Dial(addr, rpc.WithTransportCredentials(insecure.NewCredentials()), ctxDialerOp, timeOutOp)
if err != nil {
return nil, err
}
return c, nil
}
func (t *BufConn) Listen(addr string) (net.Listener, error) {
if addr == "" {
return nil, ErrEmptyAddress
}
return t.listenerFor(addr), nil
}
func (t *BufConn) Tranport(addr string) (*http.Transport, error) {
if addr == "" {
return nil, ErrEmptyAddress
}
l := t.listenerFor(addr)
return &http.Transport{
DialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
return l.DialContext(ctx)
},
}, nil
}
func (t *BufConn) listenerFor(addr string) *bufconn.Listener {
t.mu.Lock()
defer t.mu.Unlock()
listener, ok := t.listeners[addr]
if !ok {
listener = bufconn.Listen(1000)
t.listeners[addr] = listener
}
return listener
}
func (t *BufConn) CloseAll() {
for _, v := range t.listeners {
_ = v.Close()
}
}
func (t *BufConn) Close(addr string) error {
t.mu.Lock()
defer t.mu.Unlock()
l, ok := t.listeners[addr]
if ok {
delete(t.listeners, addr)
return l.Close()
}
return nil
}
func (t *BufConn) NewHTTPClient(addr string) (*http.Client, error) {
transport, err := t.Tranport(addr)
if err != nil {
return nil, err
}
return &http.Client{
Timeout: t.timeout,
Transport: transport,
}, nil
}