Percent decode path segments of URL

Cargo.lock

@@ -580,6 +580,7 @@ dependencies = [
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsqlite3-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "percent-encoding 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "r2d2 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -28,6 +28,7 @@ chrono = "0.4"
 clap = "2.26"
 bart = "0.1.4"
 bart_derive = "0.1.4"
+percent-encoding = "1.0.0"
 
 [dependencies.libsqlite3-sys]
 features = ["bundled"]

src/main.rs

@@ -12,6 +12,7 @@ extern crate clap;
 extern crate futures;
 extern crate futures_cpupool;
 extern crate hyper;
+extern crate percent_encoding;
 extern crate pulldown_cmark;
 extern crate r2d2;
 extern crate r2d2_diesel;

src/wiki_lookup.rs

@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 
-use futures::{Future, finished};
+use futures::{Future, finished, failed};
+use percent_encoding::percent_decode;
 
 use assets::*;
 use article_resource::ArticleResource;
@@ -66,7 +67,11 @@ impl Lookup for WikiLookup {
 
         let mut split = path[1..].split('/');
 
-        let slug = split.next().expect("Always at least one element").to_owned();
+        let slug = split.next().expect("Always at least one element");
+        let slug = match percent_decode(slug.as_bytes()).decode_utf8() {
+            Ok(x) => x,
+            Err(x) => return Box::new(failed(x.into()))
+        }.to_string();
 
         if split.next() != None {
             // Currently disallow any URLs of the form /slug/...