From 951c4e90b573f3d14a137bade0853fb3f0f21a5d Mon Sep 17 00:00:00 2001
From: Lia Lenckowski <lialenck@protonmail.com>
Date: Mon, 28 Aug 2023 12:42:43 +0200
Subject: supporting listening on a list of addresses

Signed-off-by: metamuffin <metamuffin@disroot.org>
---
 src/config.rs | 36 ++++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

(limited to 'src/config.rs')

diff --git a/src/config.rs b/src/config.rs
index 9e542d7..89a2b54 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,6 +1,6 @@
 use anyhow::Context;
-use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, fs::read_to_string, net::SocketAddr, path::PathBuf};
+use serde::{Deserialize, Serialize, Deserializer, de::{Visitor, Error, SeqAccess, value}};
+use std::{collections::HashMap, fmt, fs::read_to_string, net::SocketAddr, path::PathBuf};
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Config {
@@ -21,12 +21,14 @@ pub struct Limits {
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct HttpConfig {
-    pub bind: SocketAddr,
+    #[serde(deserialize_with = "string_or_seq")]
+    pub bind: Vec<SocketAddr>,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct HttpsConfig {
-    pub bind: SocketAddr,
+    #[serde(deserialize_with = "string_or_seq")]
+    pub bind: Vec<SocketAddr>,
     pub tls_cert: PathBuf,
     pub tls_key: PathBuf,
 }
@@ -45,6 +47,32 @@ pub struct FileserverConfig {
     pub index: bool,
 }
 
+// fall back to expecting a single string and putting that in a 1-length vector
+fn string_or_seq<'de, D>(des: D) -> Result<Vec<SocketAddr>, D::Error>
+where D: Deserializer<'de> {
+    struct StringOrList;
+    impl<'de> Visitor<'de> for StringOrList {
+        type Value = Vec<SocketAddr>;
+
+        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+            formatter.write_str("sequence or list")
+        }
+
+        fn visit_str<E>(self, val: &str) -> Result<Vec<SocketAddr>, E>
+        where E: Error {
+            let addr = SocketAddr::deserialize(value::StrDeserializer::new(val))?;
+            Ok(vec![addr])
+        }
+
+        fn visit_seq<A>(self, val: A) -> Result<Vec<SocketAddr>, A::Error>
+        where A: SeqAccess<'de> {
+            Vec::<SocketAddr>::deserialize(value::SeqAccessDeserializer::new(val))
+        }
+    }
+
+    des.deserialize_any(StringOrList)
+}
+
 impl Config {
     pub fn load(path: &str) -> anyhow::Result<Config> {
         let raw = read_to_string(path).context("reading config file")?;
-- 
cgit v1.2.3-70-g09d2