MongoDB C 驱动程序安装(libmongoc) 和 BSON 库(libbson)方法

安装MongoDB C驱动程序(libmongoc)和BSON库(libbson)方法如下:

1. 安装依赖项

在安装MongoDB C驱动程序和BSON库之前，需要先安装一些依赖项。以下是在Ubuntu系统中安装这些依赖项的命令:

sudo apt-get update
sudo apt-get install -y autoconf automake libtool wget git build-essential

1. 下载源代码

从MongoDB官网下载MongoDB C驱动程序(libmongoc)和BSON库(libbson)源代码:

wget https://github.com/mongodb/mongo-c-driver/releases/download/1.17.4/mongo-c-driver-1.17.4.tar.gz
wget https://github.com/mongodb/libbson/releases/download/1.17.4/libbson-1.17.4.tar.gz

1. 安装BSON库

启动BSON库安装:

tar xzf libbson-1.17.4.tar.gz
cd libbson-1.17.4
./autogen.sh --disable-automatic-init-and-cleanup
make && sudo make install

1. 安装MongoDB C驱动程序

启动MongoDB C驱动程序安装:

tar xzf mongo-c-driver-1.17.4.tar.gz
cd mongo-c-driver-1.17.4
./autogen.sh --disable-automatic-init-and-cleanup
make && sudo make install

1. 配置项目和Makefile

安装完成后，可以在Makefile中添加以下选项来链接BSON库和MongoDB C驱动程序:

-B/usr/local/lib -lsystemd -lmongoc-1.0 -lbson-1.0

可以在项目中的C文件中添加以下头文件:

#include <mongoc/mongoc.h>

1. 示例说明

下面是两个示例说明:

6.1 链接MongoDB

mongoc_client_t *client;
mongoc_uri_t *uri;
bson_error_t error;

uri = mongoc_uri_new("mongodb://localhost:27017");
client = mongoc_client_new_from_uri(uri);
if (!mongoc_client_get_server_status(client, NULL, &error)) {
    fprintf(stderr, "%s\n", error.message);
}
mongoc_uri_destroy(uri);
mongoc_client_destroy(client);

6.2 查询数据

mongoc_client_t *client;
mongoc_collection_t *collection;
mongoc_cursor_t *cursor;
const bson_t *doc;
bson_t *query;

client = mongoc_client_new("mongodb://localhost:27017");
collection = mongoc_client_get_collection(client, "database_name", "collection_name");
query = bson_new();
cursor = mongoc_collection_find_with_opts(collection, query, NULL, NULL);

while (mongoc_cursor_next(cursor, &doc)) {
   char *json_str = bson_as_json(doc, NULL);
   printf("%s\n", json_str);
   bson_free(json_str);
}

bson_destroy(query);
mongoc_cursor_destroy(cursor);
mongoc_collection_destroy(collection);
mongoc_client_destroy(client);

以上就是MongoDB C驱动程序安装(libmongoc)和BSON库(libbson)方法的完整攻略，其中包含了安装步骤和两个示例。