debug module

5 files changed, 55 insertions, 8 deletions

diff --git a/readme.md b/readme.md
index 9e96f8e..5739199 100644
--- a/readme.md
+++ b/readme.md
@@ -74,7 +74,8 @@ it will automatically be loaded and applied if valid.
     `/etc/letsencrypt/live` is possible. (string or list of strings)
   - `cert_fallback`: Path to a single directory containing a key-cert pair that
     is used when no other certificate seems appropriate. This is useful for
-    testing locally with a self-signed subjectless certificate. (optional string)
+    testing locally with a self-signed subjectless certificate. (optional
+    string)
 
 - **section `limits`**
   - Note: Make sure you do not exceed the maximum file descriptor limit on your
@@ -201,6 +202,10 @@ themselves; in that case the request is passed on.
   - `user`: User that the script is executed as. Requires to run gnix as root.
     (optional string)
 
+- **module `debug`**
+  - Replies with information about the request to debug. Includes source
+    address, HTTP version, URI and headers.
+
 #### Credentials config format
 
 Login credentials for `cookie_auth` and `http_basic_auth` are supplied as either
diff --git a/src/modules/debug.rs b/src/modules/debug.rs
new file mode 100644
index 0000000..3ab03ec
--- /dev/null
+++ b/src/modules/debug.rs
@@ -0,0 +1,44 @@
+use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
+use crate::error::ServiceError;
+use futures::Future;
+use http::{header::CONTENT_TYPE, HeaderValue, Response};
+use http_body_util::BodyExt;
+use serde::Deserialize;
+use serde_yaml::Value;
+use std::{pin::Pin, sync::Arc};
+
+pub struct DebugKind;
+
+#[derive(Deserialize)]
+struct Debug;
+
+impl NodeKind for DebugKind {
+    fn name(&self) -> &'static str {
+        "debug"
+    }
+    fn instanciate(&self, config: Value) -> anyhow::Result<Arc<dyn Node>> {
+        Ok(Arc::new(serde_yaml::from_value::<Debug>(config)?))
+    }
+}
+
+impl Node for Debug {
+    fn handle<'a>(
+        &'a self,
+        context: &'a mut NodeContext,
+        request: NodeRequest,
+    ) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
+        Box::pin(async move {
+            let s = format!(
+                "address: {:?}\nverion: {:?}\nuri: {:?}\nheaders: {:#?}",
+                context.addr,
+                request.version(),
+                request.uri(),
+                request.headers(),
+            );
+            let mut r = Response::new(s);
+            r.headers_mut()
+                .insert(CONTENT_TYPE, HeaderValue::from_static("text/plain"));
+            Ok(r.map(|b| b.map_err(|e| match e {}).boxed()))
+        })
+    }
+}
diff --git a/src/modules/error.rs b/src/modules/error.rs
index 504802f..01fe859 100644
--- a/src/modules/error.rs
+++ b/src/modules/error.rs
@@ -1,6 +1,5 @@
-use crate::error::ServiceError;
-
 use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
+use crate::error::ServiceError;
 use futures::Future;
 use serde::Deserialize;
 use serde_yaml::Value;
diff --git a/src/modules/files.rs b/src/modules/files.rs
index 607cee1..6336648 100644
--- a/src/modules/files.rs
+++ b/src/modules/files.rs
@@ -16,7 +16,6 @@ use hyper::{
     Response, StatusCode,
 };
 use log::debug;
-use markup::Render;
 use percent_encoding::percent_decode_str;
 use serde::Deserialize;
 use serde_yaml::Value;
@@ -320,14 +319,12 @@ async fn index(path: &Path, rpath: String) -> Result<String, ServiceError> {
         .filter(|e| e.as_ref().map(|(e, _)| !e.starts_with(".")).unwrap_or(true))
         .collect::<Result<Vec<_>, _>>()?;
     let banner = read_to_string(path.join("index.banner.html")).await.ok();
-    let mut s = String::new();
-    IndexTemplate {
+    let s = IndexTemplate {
         files,
         banner,
         path: rpath,
     }
-    .render(&mut s)
-    .unwrap();
+    .to_string();
     Ok(s)
 }
 
diff --git a/src/modules/mod.rs b/src/modules/mod.rs
index dfb1f02..9840935 100644
--- a/src/modules/mod.rs
+++ b/src/modules/mod.rs
@@ -10,6 +10,7 @@ use std::{net::SocketAddr, pin::Pin, sync::Arc};
 pub mod accesslog;
 pub mod auth;
 pub mod cgi;
+pub mod debug;
 pub mod error;
 pub mod file;
 pub mod files;
@@ -37,6 +38,7 @@ pub static MODULES: &[&dyn NodeKind] = &[
     &switch::SwitchKind,
     &redirect::RedirectKind,
     &cgi::CgiKind,
+    &debug::DebugKind,
 ];
 
 pub struct NodeContext {