client.go

Documentation: github.com/Azure/azure-sdk-for-go/services/cosmos-db/mongodb

     1  // Package mongodb provides Mongo DB dataplane clients for Microsoft Azure CosmosDb Services.
     2  package mongodb
     3  
     4  // Copyright (c) Microsoft Corporation. All rights reserved.
     5  // Licensed under the MIT License. See License.txt in the project root for license information.
     6  
     7  import (
     8  	"context"
     9  	"crypto/tls"
    10  	"fmt"
    11  	"net"
    12  	"strings"
    13  
    14  	"github.com/Azure/azure-sdk-for-go/services/cosmos-db/mgmt/2015-04-08/documentdb"
    15  	"github.com/Azure/go-autorest/autorest"
    16  	"github.com/Azure/go-autorest/autorest/adal"
    17  	"github.com/Azure/go-autorest/autorest/azure"
    18  	"github.com/globalsign/mgo"
    19  )
    20  
    21  const (
    22  	cosmosDbConnectionPort = 10255
    23  )
    24  
    25  // NewMongoDBClientWithConnectionString returns a MongoDb session to communicate with CosmosDB using a connection string.
    26  func NewMongoDBClientWithConnectionString(connectionString string) (*mgo.Session, error) {
    27  
    28  	// strip out the "ssl=true" option as MongoDb driver does not support by default SSL.
    29  	connectionString = strings.Replace(connectionString, "ssl=true", "", -1)
    30  	dialInfo, err := mgo.ParseURL(connectionString)
    31  
    32  	if err != nil {
    33  		return nil, err
    34  	}
    35  
    36  	return NewMongoDBClient(dialInfo)
    37  }
    38  
    39  // NewMongoDBClientWithCredentials returns a MongoDb session to communicate with CosmosDB using a username and a password.
    40  func NewMongoDBClientWithCredentials(username, password, host string) (*mgo.Session, error) {
    41  
    42  	dialInfo := &mgo.DialInfo{
    43  		Addrs:    []string{fmt.Sprintf("%s:%d", host, cosmosDbConnectionPort)},
    44  		Username: username,
    45  		Password: password,
    46  	}
    47  
    48  	return NewMongoDBClient(dialInfo)
    49  }
    50  
    51  // NewMongoDBClientWithSPToken returns a  session to communicate with CosmosDB using an auth token.
    52  func NewMongoDBClientWithSPToken(spToken *adal.ServicePrincipalToken, subscriptionID, resourceGroup, account string, environment azure.Environment) (*mgo.Session, error) {
    53  
    54  	authorizer := autorest.NewBearerAuthorizer(spToken)
    55  
    56  	cosmosDbClient := documentdb.NewDatabaseAccountsClientWithBaseURI(environment.ResourceManagerEndpoint, subscriptionID)
    57  	cosmosDbClient.Authorizer = authorizer
    58  	cosmosDbClient.AddToUserAgent("dataplane mongodb")
    59  
    60  	result, err := cosmosDbClient.ListConnectionStrings(context.Background(), resourceGroup, account)
    61  
    62  	if err != nil {
    63  		return nil, err
    64  	}
    65  
    66  	connectionStrings := *result.ConnectionStrings
    67  
    68  	for _, connectionString := range connectionStrings {
    69  		session, err := NewMongoDBClientWithConnectionString(*connectionString.ConnectionString)
    70  
    71  		if session != nil && err == nil {
    72  			return session, nil
    73  		}
    74  	}
    75  
    76  	return nil, err
    77  }
    78  
    79  // NewMongoDBClientWithMSI returns a MongoDB session to communicate with CosmosDB using MSI.
    80  func NewMongoDBClientWithMSI(subscriptionID, resourceGroup, account string, environment azure.Environment) (*mgo.Session, error) {
    81  
    82  	msiEndpoint, err := adal.GetMSIVMEndpoint()
    83  	spToken, err := adal.NewServicePrincipalTokenFromMSI(msiEndpoint, environment.ResourceManagerEndpoint)
    84  
    85  	if err != nil {
    86  		return nil, err
    87  	}
    88  
    89  	return NewMongoDBClientWithSPToken(spToken, subscriptionID, resourceGroup, account, environment)
    90  }
    91  
    92  // NewMongoDBClient returns a MongoDB session to communicate with CosmosDB.
    93  func NewMongoDBClient(dialInfo *mgo.DialInfo) (*mgo.Session, error) {
    94  
    95  	dialInfo.DialServer = func(addr *mgo.ServerAddr) (net.Conn, error) {
    96  		return tls.Dial("tcp", addr.String(), &tls.Config{})
    97  	}
    98  
    99  	session, err := mgo.DialWithInfo(dialInfo)
   100  
   101  	if err != nil {
   102  		return nil, err
   103  	}
   104  
   105  	return session, nil
   106  }
   107
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