mongodb C/C++ driver 通过帐号验证登录mongo服务器并进行相应操作

1。C 语言登录mongodb，解决登录失败错误：Authentication failed.: mongoc client_authenticate error

代码如下：

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#include
<bson.h>

#include <bcon.h>

#include <mongoc.h>

int main (int argc,

      char *argv[])

{

     mongoc_client_t *client;

     mongoc_database_t *database;

     mongoc_collection_t *collection;

     bson_t *command, reply,
*insert;

     bson_error_t error;

     char *str;

     bool retval;

        

     mongoc_init ();

     client = mongoc_client_new("mongodb://mydbUser:aaaaaa@localhost:27017/?authSource=mydb");

     database = mongoc_client_get_database
(client,
"mydb");

     collection = mongoc_client_get_collection
(client,
"mydb", "student");

     command = BCON_NEW
("ping", BCON_INT32
(1));

     retval = mongoc_client_command_simple
(client,
"mydbUser", command, NULL, &reply, &error);

     if (!retval) {

         fprintf (stderr,
"%s\n", error.message);

         return EXIT_FAILURE;

     }

     str = bson_as_json
(&reply, NULL);

     printf ("%s\n",
str);

     insert = BCON_NEW
("hello", BCON_UTF8
("world"));

     if (!mongoc_collection_insert
(collection, MONGOC_INSERT_NONE, insert, NULL, &error))
{

         fprintf (stderr,
"%s\n", error.message);

     }

     bson_destroy (insert);

     bson_destroy (&reply);

     bson_destroy (command);

     bson_free (str);

     mongoc_collection_destroy (collection);

     mongoc_database_destroy (database);

     mongoc_client_destroy (client);

     mongoc_cleanup ();

     return 0;

}

代码中第18行是登录关键：

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client = mongoc_client_new("mongodb://mydbUser:aaaaaa@localhost:27017/?authSource=mydb")

容易看出登录是已uri格式登录的，并可划分成几部分：

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mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]

开始我的登录出错是因为uri格式不对，错误提示：

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what(): Authentication failed.: mongoc client_authenticate
error

2。C++ 登录mongodb

代码如下：

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#include
<iostream>

#include <bsoncxx/builder/stream/document.hpp>

#include <bsoncxx/json.hpp>

#include <mongocxx/client.hpp>

#include <mongocxx/instance.hpp>

int main(int, char**)
{

    mongocxx::instance inst{};

    mongocxx::client conn{mongocxx::uri{"mongodb://mydbUser:aaaaaa@localhost:27017/?authSource=mydb"}};

    bsoncxx::builder::stream::document document{};

    auto collection = conn["mydb"]["student"];

    document <<
"hai!!!" <<
"world!!!";

    collection.insert_one(document.view());

    auto cursor = collection.find({});

    for (auto&& doc
: cursor) {

        std::cout
<< bsoncxx::to_json(doc)
<<
std::endl;

    }

}

登录成功关键代码是第11行：

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mongocxx::client conn{mongocxx::uri{"mongodb://mydbUser:aaaaaa@localhost:27017/?authSource=mydb"}}

说明同C 语言！！

参考链接：

C语言参考：http://api.mongodb.org/c/1.2.0/tutorial.html#connecting

C语言参考2：http://api.mongodb.org/c/1.2.0/

C++参考：https://github.com/mongodb/mongo-cxx-driver/wiki/Quickstart-Guide-(New-Driver)

登录细节参考：https://docs.mongodb.org/manual/reference/connection-string/

登录细节参考2： http://api.mongodb.org/c/current/authentication.html