Скачивание XLS документа по ссылке

src/xls_downloader/interface.rs

@@ -0,0 +1,44 @@
+use chrono::{DateTime, Utc};
+
+#[derive(PartialEq, Debug)]
+pub enum FetchError {
+    NoUrlProvided,
+    Unknown,
+    BadStatusCode,
+    BadContentType,
+    BadHeaders,
+}
+
+pub struct FetchOk {
+    pub etag: String,
+    pub uploaded_at: DateTime<Utc>,
+    pub requested_at: DateTime<Utc>,
+    pub data: Option<Vec<u8>>,
+}
+
+impl FetchOk {
+    pub fn head(etag: String, uploaded_at: DateTime<Utc>) -> Self {
+        FetchOk {
+            etag,
+            uploaded_at,
+            requested_at: Utc::now(),
+            data: None,
+        }
+    }
+
+    pub fn get(etag: String, uploaded_at: DateTime<Utc>, data: Vec<u8>) -> Self {
+        FetchOk {
+            etag,
+            uploaded_at,
+            requested_at: Utc::now(),
+            data: Some(data),
+        }
+    }
+}
+
+pub type FetchResult = Result<FetchOk, FetchError>;
+
+pub trait XLSDownloader {
+    async fn fetch(&self, head: bool) -> FetchResult;
+    async fn set_url(&mut self, url: String) -> Result<(), FetchError>;
+}