api2/subscription.rs: add subscription api class

Cargo.toml

@@ -30,4 +30,5 @@ openssl = "0.10"
 siphasher = "0.3"
 endian_trait = "0.6"
 walkdir = "2"
+md5 = "0.6"
 

src/api2/subscription.rs

@@ -0,0 +1,28 @@
+use failure::*;
+
+use crate::tools;
+use crate::api::schema::*;
+use crate::api::router::*;
+use serde_json::{json, Value};
+
+
+fn get_subscription(_param: Value, _info: &ApiMethod) -> Result<Value, Error> {
+
+    let url = "https://www.proxmox.com/en/proxmox-backup-server/pricing";
+    Ok(json!({
+        "status": "NotFound",
+	"message": "There is no subscription key",
+	"serverid": tools::get_hardware_address()?,
+	"url":  url,
+     }))
+}
+
+pub fn router() -> Router {
+
+    let route = Router::new()
+        .get(ApiMethod::new(
+            get_subscription,
+            ObjectSchema::new("Read subscription info.")));
+
+    route
+}

src/tools.rs

@@ -355,3 +355,16 @@ pub fn scandir<P, F>(
     }
     Ok(())
 }
+
+pub fn get_hardware_address() -> Result<String, Error> {
+
+    static FILENAME: &str = "/etc/ssh/assh_host_rsa_key.pub";
+
+    let mut file = File::open(FILENAME)?;
+    let mut contents = Vec::new();
+    file.read_to_end(&mut contents)?;
+
+    let digest = md5::compute(contents);
+
+    Ok(format!("{:0x}", digest))
+}