github.com/tickoalcantara12/micro/v3@v3.0.0-20221007104245-9d75b9bcbab9/service/network/resolver/dnssrv/dnssrv.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License");
     2  // you may not use this file except in compliance with the License.
     3  // You may obtain a copy of the License at
     4  //
     5  //     https://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS,
     9  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    10  // See the License for the specific language governing permissions and
    11  // limitations under the License.
    12  //
    13  // Original source: github.com/micro/go-micro/v3/network/resolver/dnssrv/dnssrv.go
    14  
    15  // Package dns srv resolves names to dns srv records
    16  package dnssrv
    17  
    18  import (
    19  	"fmt"
    20  	"net"
    21  
    22  	"github.com/tickoalcantara12/micro/v3/service/network/resolver"
    23  )
    24  
    25  // Resolver is a DNS network resolve
    26  type Resolver struct{}
    27  
    28  // Resolve assumes ID is a domain name e.g micro.mu
    29  func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
    30  	_, addrs, err := net.LookupSRV("network", "udp", name)
    31  	if err != nil {
    32  		return nil, err
    33  	}
    34  	records := make([]*resolver.Record, 0, len(addrs))
    35  	for _, addr := range addrs {
    36  		address := addr.Target
    37  		if addr.Port > 0 {
    38  			address = fmt.Sprintf("%s:%d", addr.Target, addr.Port)
    39  		}
    40  		records = append(records, &resolver.Record{
    41  			Address: address,
    42  		})
    43  	}
    44  	return records, nil
    45  }