Rest (CRUD) API made for web programming course, initially used as a backend for the photo sharing platform university project. Now is just a demo project, showcasing some of the interesting meta-programming approaches.
Nix can get all dependencies for you, no need for pulling your hair out!
To keep your hair, look at the Building with Nix section.
- c++20 compatible compiler (GCC/Clang)
- fmt-lib (restinio dependency): https://github.com/fmtlib/fmt
- restinio (HTTP Server + router): https://github.com/Stiffstream/restinio
- refl-cpp (Static reflection): https://github.com/veselink1/refl-cpp
- BoostHana (metaprogramming): https://www.boost.org/doc/libs/1_73_0/libs/hana/doc/html/index.html
- nlohmann::json (json): https://github.com/nlohmann/json
- SOCI (DBAccessLib for SQL/sqlite): https://github.com/SOCI/soci
- Reducing boilerplate code and emracing DRY principle of programming.
- Making nice framework for building RESTful APIs.
- High performance, scalability and low latency
- Constraints on model are represented easily with type oriented constraint design.
/* Base class Model will inject json(), get_unsatisfied_constraints() and more similar methods */
struct User : Model<User> {
Field<int,cnstr::Unique> id;
Field<std::string, cnstr::Unique, cnstr::Length<1,10>, cnstr::Required> username;
Field<std::string, cnstr::Required, cnstr::Length<6,255>> password;
Field<std::string, cnstr::Unique,cnstr::Required, cnstr::NotEmpty, cnstr::Length<2,32>> email;
Field<std::string, cnstr::Required, cnstr::Length<2,64>> firstname;
Field<std::string, cnstr::Required, cnstr::Length<2,64>> lastname;
Field<int, cnstr::Required> born; // linux time (since epoch)
Field<std::string> status;
};
/* Required for static reflection */
REFL_AUTO(
type(rs::model::User),
field(id),
field(username),
field(password),
...
)rs::model::User kotur {
.username = { "kotur" },
.password = { "pwd" },
.email = { "" },
.firstname = { "Nebojsa" },
.lastname = { "Koturovic" },
.born = { "1995-10-10" },
};
/* We get '.json()' method for free with zero coding */
std::cout << kotur.json().dump(2);
/* Validation: Geting description map<key,vec<dsc>> for all unsatisfied constraints */
if (auto dsc_map = kotur.get_unsatisfied_constraints()
.transform(rs::model::cnstr::get_description); !dsc_map.empty())
std::cout << nlohmann::json(dsc_map).dump(2) << '\n';Output:
{
"born": "1995-10-10",
"email": "",
"firstname": "Nebojsa",
"lastname": "Koturovic",
"password": "pwd",
"username": "kotur"
}
{
"email": [
"Field must not be empty",
"Length should be from 2 to 32"
],
"gender": [
"Field should not be empty or invalid"
],
"password": [
"Length should be from 6 to 255"
]
}Also, our models are automatically adjusted to work with SOCI-sql library for free.
rs::model::User user;
soci::statement getUsersStmt = (sql.prepare << "SELECT * FROM users", soci::into(user));
getUsersStmt.execute();
while (getUsersStmt.fetch())
std::cout << user.json() << '\n';Output:
{
"born": "1994-04-20",
"email": "[email protected]",
"firstname": "Mladen",
"gender": "m",
"id": 1,
"join_date": "2020-06-30",
"lastname": "Mladenovic",
"password": "qweqwe123",
"permission_group": 3,
"username": "djomla96"
}
{
"born": "1995-10-10",
"email": "[email protected]",
"firstname": "Nebojsa",
"gender": "m",
"id": 2,
"join_date": "2020-07-01",
"lastname": "Koturovic",
"password": "qweqwe123",
"permission_group": 3,
"username": "kotur"
}
...It can be built with the Nix package manager
nix-buildAnd then run it
./result/bin/cpp-rest-server# Entering the shell will automatically install all of the dependencies
nix-shell
# Optinally add --pure flag to isolate shell from the rest of the system
nix-shell --pureWithin the shell, you can just build it with CMake
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make -j8
./cpp-rest-server
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