我有一个新的 Rust Programming 后端学习。从 Web 框架开始。因为我想在 MongoDB 中使用 Rust 后端，所以我有 Nickel 的示例代码。无论如何，我也看到有 Actix Web 框架。
Actix Web 是否像 Nickel 一样支持 MongoDB？
以下示例为 MongoDB 提供 Nickel。
//main.rs — Nickel
#[macro_use]
extern crate nickel;
extern crate rustc_serialize;
#[macro_use(bson, doc)]
extern crate bson;
extern crate mongodb;
// Nickel
use nickel::{Nickel, JsonBody, HttpRouter, MediaType};
use nickel::status::StatusCode::{self};
// MongoDB
use mongodb::{Bson, bson, doc};
use mongodb::{Client, ThreadedClient};
use mongodb::db::ThreadedDatabase;
use mongodb::error::Result as MongoResult;
// bson
use bson::{Bson, Document};
use bson::oid::ObjectId;
// serde
use serde::{Serialize, Deserialize};
use std::fs::File;
use std::io::Read;
#[derive(Debug, Serialize, Deserialize)]
struct User {
firstname: String,
lastname: String,
email: String
}
fn main(){
let mut server = Nickel::new();
let mut router = Nickel::router();
router.get("/users", middleware! { |_req, _res|
let client = Client::connect("localhost", 27017)
.ok().expect("Error establishing connection.");
let coll = client.db("rusty").collection("users");
let mut cursor = coll.find(None, None).unwrap();
let mut data_result = "{\"data\":[".to_owned();
for (i, result) in cursor.enumerate() {
if let Ok(item) = result {
if let Some(&Bson::String(ref firstname)) = item.get("firstname") {
let string_data = if i == 0 {
format!("{},", firstname)
} else {
format!("{},", firstname)
};
data_result.push_str(&string_data);
}
}
}
data_result.push_str("]}");
format!("{}", data_result)
});
router.post("/users/new", middleware! { |_req, _res|
let user = _req.json_as::<User>().unwrap();
let firstname = user.firstname.to_string();
let lastname = user.lastname.to_string();
let email = user.email.to_string();
let client = Client::connect("localhost", 27017)
.ok().expect("Error establishing connection.");
let coll = client.db("rusty").collection("users");
match coll.insert_one(doc! {
"firstname" => firstname,
"lastname" => lastname,
"email" => email
}, None) {
Ok(_) => (StatusCode::Ok, "Item saved!"),
Err(e) => return _res.send(format!("{}", e))
}
});
router.delete("/users/:id", middleware! { |_req, _res|
let client = Client::connect("localhost", 27017)
.ok().expect("Failed to initialize standalone client.");
let coll = client.db("rusty").collection("users");
let object_id = _req.param("id").unwrap();
let id = match ObjectId::with_string(object_id) {
Ok(oid) => oid,
Err(e) => return _res.send(format!("{}", e))
};
match coll.delete_one(doc! {"_id" => id}, None) {
Ok(_) => (StatusCode::Ok, "Item deleted!"),
Err(e) => return _res.send(format!("{}", e))
}
});
server.utilize(router);
server.listen("0.0.0.0:3000").unwrap();
}