Add optional serde support

Cargo.toml

@@ -14,6 +14,12 @@ futures-fs = "0.0.4"
 http = "0.1.5"
 log = "0.4.1"
 mime = "0.3.5"
+serde = { version = "1.0", optional = true }
+serde_derive = { version = "1.0", optional = true }
+
+[features]
+default = []
+with-serde = ["serde", "serde_derive"]
 
 [dev-dependencies]
 env_logger = "0.5.9"

src/lib.rs

@@ -10,6 +10,12 @@ extern crate http;
 extern crate log;
 extern crate mime;
 
+#[cfg(feature = "with-serde")]
+extern crate serde;
+#[cfg(feature = "with-serde")]
+#[macro_use]
+extern crate serde_derive;
+
 use std::path::PathBuf;
 
 mod error;

src/types.rs

@@ -6,6 +6,7 @@ use futures_cpupool::CpuPool;
 use super::FilenameGenerator;
 
 #[derive(Clone, Debug, PartialEq)]
+#[cfg_attr(feature = "with-serde", derive(Deserialize, Serialize))]
 pub enum NamePart {
     Map(String),
     Array,
@@ -278,6 +279,7 @@ pub type MultipartHash = (Vec<NamePart>, MultipartContent);
 pub type MultipartForm = Vec<MultipartHash>;
 
 #[derive(Clone, Debug, PartialEq)]
+#[cfg_attr(feature = "with-serde", derive(Deserialize, Serialize))]
 pub enum MultipartContent {
     File {
         filename: String,