refactor(header): replace url crate with percent-encoding

Cargo.toml

@@ -27,13 +27,13 @@ httparse = "1.0"
 language-tags = "0.2"
 log = "0.3"
 mime = "0.3.2"
+percent-encoding = "1.0"
 time = "0.1"
 tokio-core = "0.1.6"
 tokio-proto = "0.1"
 tokio-service = "0.1"
 tokio-io = "0.1"
 unicase = "2.0"
-url = "1.0"
 
 [dev-dependencies]
 num_cpus = "1.0"

src/header/parsing.rs

@@ -4,7 +4,7 @@ use language_tags::LanguageTag;
 use std::str;
 use std::str::FromStr;
 use std::fmt::{self, Display};
-use url::percent_encoding;
+use percent_encoding;
 
 use header::Raw;
 use header::shared::Charset;
@@ -156,23 +156,18 @@ pub fn http_percent_encode(f: &mut fmt::Formatter, bytes: &[u8]) -> fmt::Result
 }
 
 mod percent_encoding_http {
-    use std::fmt;
+    use percent_encoding;
-    use url::percent_encoding;
 
+    // internal module because macro is hard-coded to make a public item
+    // but we don't want to public export this item
     define_encode_set! {
-        /// This encode set is used for HTTP header values and is defined at
+        // This encode set is used for HTTP header values and is defined at
-        /// https://tools.ietf.org/html/rfc5987#section-3.2
+        // https://tools.ietf.org/html/rfc5987#section-3.2
         pub HTTP_VALUE = [percent_encoding::SIMPLE_ENCODE_SET] | {
             ' ', '"', '%', '\'', '(', ')', '*', ',', '/', ':', ';', '<', '-', '>', '?',
             '[', '\\', ']', '{', '}'
         }
     }
-
-    impl fmt::Debug for HTTP_VALUE {
-        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-            f.pad("HTTP_VALUE")
-        }
-    }
 }
 
 #[cfg(test)]

src/lib.rs

@@ -17,6 +17,7 @@
 //! If just starting out, **check out the [Guides](https://hyper.rs/guides)
 //! first.**
 
+extern crate base64;
 extern crate bytes;
 #[macro_use] extern crate futures;
 extern crate futures_cpupool;
@@ -24,14 +25,13 @@ extern crate httparse;
 extern crate language_tags;
 #[macro_use] extern crate log;
 pub extern crate mime;
-extern crate base64;
+#[macro_use] extern crate percent_encoding;
 extern crate time;
 extern crate tokio_core as tokio;
 #[macro_use] extern crate tokio_io;
 extern crate tokio_proto;
 extern crate tokio_service;
 extern crate unicase;
-#[macro_use] extern crate url;
 
 #[cfg(all(test, feature = "nightly"))]
 extern crate test;