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Add dnsresolve client chain elements
Signed-off-by: Artem Glazychev <artem.glazychev@xored.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| // Copyright (c) 2020-2022 Doc.ai and/or its affiliates. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at: | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package dnsresolve | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "net" | ||
|
|
||
| "github.com/golang/protobuf/ptypes/empty" | ||
| "google.golang.org/grpc" | ||
|
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| "github.com/networkservicemesh/api/pkg/api/registry" | ||
|
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| "github.com/networkservicemesh/sdk/pkg/registry/core/next" | ||
|
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| "github.com/networkservicemesh/sdk/pkg/tools/clienturlctx" | ||
| "github.com/networkservicemesh/sdk/pkg/tools/interdomain" | ||
| ) | ||
|
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| type dnsNSResolveClient struct { | ||
| resolver Resolver | ||
| registryService string | ||
| } | ||
|
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| // NewNetworkServiceRegistryClient creates new NetworkServiceRegistryClient that can resolve passed domain to clienturl | ||
| func NewNetworkServiceRegistryClient(opts ...Option) registry.NetworkServiceRegistryClient { | ||
| var clientOptions = &options{ | ||
| resolver: net.DefaultResolver, | ||
| registryService: DefaultRegistryService, | ||
| } | ||
|
|
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| for _, opt := range opts { | ||
| opt(clientOptions) | ||
| } | ||
|
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| r := &dnsNSResolveClient{ | ||
| resolver: clientOptions.resolver, | ||
| registryService: clientOptions.registryService, | ||
| } | ||
|
|
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| return r | ||
| } | ||
|
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| func (d *dnsNSResolveClient) Register(ctx context.Context, ns *registry.NetworkService, opts ...grpc.CallOption) (*registry.NetworkService, error) { | ||
| domain := interdomain.Domain(ns.Name) | ||
| url, err := resolveDomain(ctx, d.registryService, domain, d.resolver) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ctx = clienturlctx.WithClientURL(ctx, url) | ||
| ns.Name = interdomain.Target(ns.Name) | ||
| resp, err := next.NetworkServiceRegistryClient(ctx).Register(ctx, ns, opts...) | ||
|
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| resp.Name = interdomain.Join(resp.Name, domain) | ||
|
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| return resp, err | ||
| } | ||
|
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| type dnsNSResolveFindClient struct { | ||
| registry.NetworkServiceRegistry_FindClient | ||
| domain string | ||
| } | ||
|
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| func (c *dnsNSResolveFindClient) Recv() (*registry.NetworkServiceResponse, error) { | ||
| resp, err := c.NetworkServiceRegistry_FindClient.Recv() | ||
| if err != nil { | ||
| return resp, err | ||
| } | ||
| resp.NetworkService.Name = interdomain.Join(resp.NetworkService.Name, c.domain) | ||
|
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| return resp, err | ||
| } | ||
|
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| func (d *dnsNSResolveClient) Find(ctx context.Context, q *registry.NetworkServiceQuery, opts ...grpc.CallOption) (registry.NetworkServiceRegistry_FindClient, error) { | ||
| domain := interdomain.Domain(q.NetworkService.Name) | ||
| if domain == "" { | ||
| return nil, errors.New("domain cannot be empty") | ||
| } | ||
| url, err := resolveDomain(ctx, d.registryService, domain, d.resolver) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ctx = clienturlctx.WithClientURL(ctx, url) | ||
| q.NetworkService.Name = interdomain.Target(q.NetworkService.Name) | ||
|
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| resp, err := next.NetworkServiceRegistryClient(ctx).Find(ctx, q, opts...) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return &dnsNSResolveFindClient{ | ||
| NetworkServiceRegistry_FindClient: resp, | ||
| domain: domain, | ||
| }, nil | ||
| } | ||
|
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| func (d *dnsNSResolveClient) Unregister(ctx context.Context, ns *registry.NetworkService, opts ...grpc.CallOption) (*empty.Empty, error) { | ||
| domain := interdomain.Domain(ns.Name) | ||
| url, err := resolveDomain(ctx, d.registryService, domain, d.resolver) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ctx = clienturlctx.WithClientURL(ctx, url) | ||
| ns.Name = interdomain.Target(ns.Name) | ||
| defer func() { | ||
| ns.Name = interdomain.Join(ns.Name, domain) | ||
| }() | ||
| return next.NetworkServiceRegistryClient(ctx).Unregister(ctx, ns, opts...) | ||
| } |
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