Connects to a MongoDB instance.
If the host/port form is used, default settings will be used, which enable safe updates, but no fsync. By specifying a URL instead, it is possible to fully customize the settings. See http://www.mongodb.org/display/DOCS/Connections for the complete set of options. Note that 'sslverifycertificate' is only present in some client bindings, including here.
Note that the returned MongoClient uses a vibe.core.connectionpool.ConnectionPool internally to create and reuse connections as necessary. Thus, the MongoClient instance can - and should - be shared among all fibers in a thread by storing in in a thread local variable.
Authenticated connections are supported by using a URL connection string such as "mongodb://user:password@host". Note that the driver currently only supports the "MongoDB-CR" authentication mechanism. Since new MongoDB versions, starting with 3.0, default to the new "SCRAM-SHA-1" method, it is necessary to manually switch to the old method. See http://stackoverflow.com/questions/29006887/mongodb-cr-authentication-failed for more information.
// connecting with default settings: auto client = connectMongoDB("127.0.0.1"); auto users = client
.getCollection("users"); users .insert(Bson("peter"));
// connecting using the URL form with custom settings auto client = connectMongoDB("mongodb://localhost/?slaveOk=true");
// connecting with SSL encryption enabled and verification off auto client = connectMongoDB("mongodb://localhost/?ssl=true&sslverifycertificate=false");
|host||Specifies the host name or IP address of the MongoDB server.|
|port||Can be used to specify the port of the MongoDB server if different from the default one.|
|host_or_url||Can either be a host name, in which case the default port will be used, or a URL with the mongodb:// scheme.|
|settings||An object containing the full set of possible configuration options.|
A new MongoClient instance that can be used to access the database.
Throws an exception if a mongodb:// URL is given and the URL cannot be parsed. An exception will not be thrown if called with a hostname and port.