Add ability to configure index file

Author: SoulSharer

source/river/assets/test-config.kdl

@@ -129,6 +129,10 @@ services {
             //
             // All files within the root will be available
             base-path "."
+            // Redirect to an index file on URI like "/" GET, can include multiple options
+            //
+            // This is optional.
+            index-file "index.html"
         }
     }
 }

source/river/src/config/internal.rs

@@ -135,6 +135,7 @@ pub struct PathControl {
 #[derive(Debug, Clone)]
 pub struct FileServerConfig {
     pub(crate) name: String,
+    pub(crate) index_file: Vec<String>,
     pub(crate) listeners: Vec<ListenerConfig>,
     pub(crate) base_path: Option<PathBuf>,
 }

source/river/src/config/kdl/mod.rs

@@ -222,10 +222,22 @@ fn extract_file_server(
         None
     };
 
+    // Index File
+    //
+    let index_file = if let Some((ifnode, ifargs)) = map.get("index-file") {
+        ifargs
+            .iter()
+            .filter_map(|arg| arg.value().as_string().map(ToOwned::to_owned))
+            .collect()
+    } else {
+        vec![]
+    };
+
     Ok(FileServerConfig {
         name: name.to_string(),
         listeners: list_cfgs,
         base_path,
+        index_file,
     })
 }
 

source/river/src/files.rs

@@ -18,7 +18,7 @@ pub fn river_file_server(
     let fsconf = StaticFilesConf {
         root: conf.base_path,
         canonicalize_uri: true,
-        index_file: Vec::new().into(),
+        index_file: conf.index_file.into(),
         page_404: None,
         precompressed: Vec::new().into(),
         ..Default::default()