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client: add proxy option (#1885)

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* client: add proxy option

* client: add WithProxy CallOption

* use address option

* ProxyAddress => Proxy
This commit is contained in:
ben-toogood 2020-07-30 15:22:36 +01:00 committed by GitHub
parent 006bbefaf3
commit e9fc5b1671
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 35 additions and 88 deletions
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10
client/grpc/grpc.go
View File

@ -411,6 +411,11 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
callOpts.Selector = g.opts.Selector
}
// inject proxy address
if len(callOpts.Address) == 0 && len(g.opts.Proxy) > 0 {
callOpts.Address = []string{g.opts.Proxy}
}
// lookup the route to send the reques to
route, err := client.LookupRoute(req, callOpts)
if err != nil {
@ -514,6 +519,11 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
callOpts.Selector = g.opts.Selector
}
// inject proxy address
if len(callOpts.Address) == 0 && len(g.opts.Proxy) > 0 {
callOpts.Address = []string{g.opts.Proxy}
}
// lookup the route to send the reques to
route, err := client.LookupRoute(req, callOpts)
if err != nil {

15
client/mucp/mucp.go
View File

@ -17,7 +17,6 @@ import (
"github.com/micro/go-micro/v3/registry"
"github.com/micro/go-micro/v3/transport"
"github.com/micro/go-micro/v3/util/buf"
"github.com/micro/go-micro/v3/util/net"
"github.com/micro/go-micro/v3/util/pool"
)
@ -379,6 +378,11 @@ func (r *rpcClient) Call(ctx context.Context, request client.Request, response i
callOpts.Selector = r.opts.Selector
}
// inject proxy address
if len(callOpts.Address) == 0 && len(r.opts.Proxy) > 0 {
callOpts.Address = []string{r.opts.Proxy}
}
// lookup the route to send the request via
route, err := client.LookupRoute(request, callOpts)
if err != nil {
@ -403,7 +407,7 @@ func (r *rpcClient) Call(ctx context.Context, request client.Request, response i
retries := callOpts.Retries
// disable retries when using a proxy
if _, _, ok := net.Proxy(request.Service(), callOpts.Address); ok {
if len(r.opts.Proxy) > 0 {
retries = 0
}
@ -475,6 +479,11 @@ func (r *rpcClient) Stream(ctx context.Context, request client.Request, opts ...
callOpts.Selector = r.opts.Selector
}
// inject proxy address
if len(callOpts.Address) == 0 && len(r.opts.Proxy) > 0 {
callOpts.Address = []string{r.opts.Proxy}
}
// lookup the route to send the request via
route, err := client.LookupRoute(request, callOpts)
if err != nil {
@ -504,7 +513,7 @@ func (r *rpcClient) Stream(ctx context.Context, request client.Request, opts ...
retries := callOpts.Retries
// disable retries when using a proxy
if _, _, ok := net.Proxy(request.Service(), callOpts.Address); ok {
if len(r.opts.Proxy) > 0 {
retries = 0
}

9
client/options.go
View File

@ -17,6 +17,8 @@ import (
type Options struct {
// Used to select codec
ContentType string
// Proxy address to send requests via
Proxy string
// Plugged interfaces
Broker broker.Broker
@ -149,6 +151,13 @@ func ContentType(ct string) Option {
}
}
// Proxy sets the proxy address
func Proxy(addr string) Option {
return func(o *Options) {
o.Proxy = addr
}
}
// PoolSize sets the connection pool size
func PoolSize(d int) Option {
return func(o *Options) {

12
client/util.go
View File

@ -6,19 +6,15 @@ import (
"github.com/micro/go-micro/v3/errors"
"github.com/micro/go-micro/v3/router"
"github.com/micro/go-micro/v3/selector"
pnet "github.com/micro/go-micro/v3/util/net"
)
// LookupRoute for a request using the router and then choose one using the selector
func LookupRoute(req Request, opts CallOptions) (*router.Route, error) {
// check to see if the proxy has been set, if it has we don't need to lookup the routes; net.Proxy
// returns a slice of addresses, so we'll use a random one. Eventually we should to use the
// selector for this.
service, addresses, _ := pnet.Proxy(req.Service(), opts.Address)
if len(addresses) > 0 {
// check to see if an address was provided as a call option
if len(opts.Address) > 0 {
return &router.Route{
Service: service,
Address: addresses[rand.Int()%len(addresses)],
Service: req.Service(),
Address: opts.Address[rand.Int()%len(opts.Address)],
}, nil
}

41
util/net/net.go
View File

@ -4,7 +4,6 @@ import (
"errors"
"fmt"
"net"
"os"
"strconv"
"strings"
)
@ -78,43 +77,3 @@ func Listen(addr string, fn func(string) (net.Listener, error)) (net.Listener, e
// why are we here?
return nil, fmt.Errorf("unable to bind to %s", addr)
}
// Proxy returns the proxy and the address if it exits
func Proxy(service string, address []string) (string, []string, bool) {
var hasProxy bool
// get proxy. we parse out address if present
if prx := os.Getenv("MICRO_PROXY"); len(prx) > 0 {
// default name
if prx == "service" {
prx = "go.micro.proxy"
address = nil
}
// check if its an address
if v := strings.Split(prx, ":"); len(v) > 1 {
address = []string{prx}
}
service = prx
hasProxy = true
return service, address, hasProxy
}
if prx := os.Getenv("MICRO_NETWORK"); len(prx) > 0 {
// default name
if prx == "service" {
prx = "go.micro.network"
}
service = prx
hasProxy = true
}
if prx := os.Getenv("MICRO_NETWORK_ADDRESS"); len(prx) > 0 {
address = []string{prx}
hasProxy = true
}
return service, address, hasProxy
}

36
util/net/net_test.go
View File

@ -2,7 +2,6 @@ package net
import (
"net"
"os"
"testing"
)
@ -25,38 +24,3 @@ func TestListen(t *testing.T) {
// Expect addr DO NOT has extra ":" at the end!
}
// TestProxyEnv checks whether we have proxy/network settings in env
func TestProxyEnv(t *testing.T) {
service := "foo"
address := []string{"bar"}
s, a, ok := Proxy(service, address)
if ok {
t.Fatal("Should not have proxy", s, a, ok)
}
test := func(key, val, expectSrv, expectAddr string) {
// set env
os.Setenv(key, val)
s, a, ok := Proxy(service, address)
if !ok {
t.Fatal("Expected proxy")
}
if len(expectSrv) > 0 && s != expectSrv {
t.Fatal("Expected proxy service", expectSrv, "got", s)
}
if len(expectAddr) > 0 {
if len(a) == 0 || a[0] != expectAddr {
t.Fatal("Expected proxy address", expectAddr, "got", a)
}
}
os.Unsetenv(key)
}
test("MICRO_PROXY", "service", "go.micro.proxy", "")
test("MICRO_NETWORK", "service", "go.micro.network", "")
test("MICRO_NETWORK_ADDRESS", "10.0.0.1:8081", "", "10.0.0.1:8081")
}