There is a "@" character in my password and I tried to use connection string URI to connect MongoDB

_{mongo 'mongodb://user:abc@123@localhost:27017'}

And I get this error:

~➜ ~ mongo 'mongodb://da:abc@123@localhost:27017'
MongoDB shell version v3.4.0
connecting to: mongodb://da:abc@123@localhost:27017
2017-02-14T15:02:59.061+0800 I NETWORK [main] getaddrinfo("123@localhost") failed: nodename nor servname provided, or not known
2017-02-14T15:02:59.063+0800 E QUERY [main] Error: couldn't initialize connection to host 123@localhost, address is invalid :
connect@src/mongo/shell/mongo.js:234:13
@(connect):1:6
exception: connect failed~

But _{mongo admin -u da -p 'abc@123'} works well.So I read the mongo shell and mongo-cxx-driver code and I found this:

~namespace

{ const char kMongoDBURL[] = // scheme: non-capturing "mongodb://" // credentials: two inner captures for user and password "(?:([^:]+)(?::([^@]+))?@)?" // servers: grabs all host:port or UNIX socket names "((?:(?:[^\\/]+|/.+.sock?),?)+)" // database: matches anything but the chars that cannot // be part of a MongoDB database name. "(?:/([^/\\.\\ \"*<>:\\|\\?]*))?" // options "(?:\\?(?:(.+=.+)&?)+)*"; }

// namespace~

So it means that if my connection URI is

_{mongo 'mongodb://user:abc@123@localhost:27017'}

it will return _{mongodb://da1:abc@} rather than _{mongodb://da1:abc@123@} ,is it a bug or I missed something?

Thanks.