Create network/mod.rs

Cargo.toml

@@ -11,3 +11,4 @@ reqwest = "0.9.20"
 serde_json = "1.0.39"
 serde = {version = "1.0.92", features = ["derive"] }
 lazy_static = "1.3"
+apply = "0.2.2"

src/core/mod.rs

@@ -1,7 +1,5 @@
 use reqwest::r#async::Client;
 
-use reqwest::StatusCode;
-
 mod games;
 mod getting_updates;
 mod inline_mode;
@@ -9,22 +7,5 @@ mod other;
 mod payments;
 mod stickers;
 mod telegram_passport;
+mod network;
 mod updating_messages;
-
-lazy_static! {
-    static ref REQWEST_CLIENT: Client = Client::new();
-}
-
-const TELEGRAM_URL_START: &str = "https://api.telegram.org/bot";
-
-#[derive(Debug)]
-pub enum Error {
-    Api {
-        status_code: StatusCode,
-        description: Option<String>,
-    },
-    Send(reqwest::Error),
-    InvalidJson(reqwest::Error),
-}
-
-pub type Response<T> = Result<T, Error>;

src/core/network/mod.rs

@@ -0,0 +1,61 @@
+use reqwest::StatusCode;
+use reqwest::r#async::Client;
+use serde_json::Value;
+use futures::compat::Future01CompatExt;
+use reqwest::r#async::multipart::Form;
+use apply::Apply;
+
+
+const TELEGRAM_URL_START: &str = "https://api.telegram.org/bot";
+
+#[derive(Debug)]
+pub enum Error {
+    Api {
+        status_code: StatusCode,
+        description: Option<String>,
+    },
+    Send(reqwest::Error),
+    InvalidJson(reqwest::Error),
+}
+
+pub type Response<T> = Result<T, Error>;
+
+pub async fn request<T: serde::de::DeserializeOwned>(
+    client: &Client,
+    token: &str,
+    method_name: &str,
+    params: Option<Form>,
+) -> Response<T> {
+    let mut response = client
+        .post(&format!(
+            "{}{token}/{method}",
+            TELEGRAM_URL_START,
+            token = token,
+            method = method_name,
+        ))
+        .apply(|req| if let Some(params) = params {
+            req.multipart(params)
+        } else { req })
+        .send()
+        .compat()
+        .await
+        .map_err(Error::Send)?;
+
+    let response_json = response
+        .json::<Value>()
+        .compat()
+        .await
+        .map_err(Error::InvalidJson)?;
+
+    if response_json["ok"] == "false" {
+        return Err(Error::Api {
+            status_code: response.status(),
+            description: match response_json.get("description") {
+                None => None,
+                Some(description) => Some(description.to_string()),
+            },
+        });
+    }
+
+    Ok(serde_json::from_value(response_json["result"].clone()).unwrap())
+}