http_protocol: add AnnounceEvent::as_str, run cargo fmt

aquatic_http_protocol/src/common.rs

@@ -52,6 +52,17 @@ impl FromStr for AnnounceEvent {
     }
 }
 
+impl AnnounceEvent {
+    pub fn as_str(&self) -> Option<&str> {
+        match self {
+            Self::Started => Some("started"),
+            Self::Stopped => Some("stopped"),
+            Self::Completed => Some("completed"),
+            Self::Empty => None,
+        }
+    }
+}
+
 #[cfg(test)]
 impl quickcheck::Arbitrary for InfoHash {
     fn arbitrary(g: &mut quickcheck::Gen) -> Self {

aquatic_http_protocol/src/request.rs

@@ -283,9 +283,13 @@ impl Request {
         let query_string = split_parts.next().with_context(|| "no query string")?;
 
         if location == "/announce" {
-            Ok(Request::Announce(AnnounceRequest::from_query_string(query_string)?))
+            Ok(Request::Announce(AnnounceRequest::from_query_string(
+                query_string,
+            )?))
         } else {
-            Ok(Request::Scrape(ScrapeRequest::from_query_string(query_string)?))
+            Ok(Request::Scrape(ScrapeRequest::from_query_string(
+                query_string,
+            )?))
         }
     }