add function to serialize to vector

Author: zeegomo

src/utils/mod.rs

@@ -10,6 +10,7 @@ pub(crate) mod http;
 #[macro_use]
 mod macros;
 pub(crate) mod path;
+pub(crate) mod serialize;
 pub mod size;
 pub(crate) mod string;
 

src/utils/serialize.rs

@@ -0,0 +1,17 @@
+use serde::ser::{Serialize, SerializeSeq, Serializer};
+use std::iter::IntoIterator;
+
+pub fn to_vec<S, T>(data: T, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+    T: IntoIterator,
+    T::Item: Serialize,
+    T::IntoIter: std::iter::ExactSizeIterator,
+{
+    let data = IntoIterator::into_iter(data);
+    let mut seq = serializer.serialize_seq(Some(data.len()))?;
+    for element in data {
+        seq.serialize_element(&element)?;
+    }
+    seq.end()
+}