move rendering of headers to the Headers object

examples/client.rs

@@ -32,8 +32,8 @@ fn main() {
     };
 
     let mut res = req
-        .start().ok().expect("Error writing Headers.")
-        .send().ok().expect("Error sending Request.");
+        .start().unwrap()
+        .send().unwrap();
 
     println!("Response: {}", res.status);
     println!("{}", res.headers);

src/client/request.rs

@@ -112,7 +112,6 @@ impl Request<Fresh> {
         try_io!(write!(self.body, "{} {} {}", self.method, uri, self.version))
         try_io!(self.body.write(LINE_ENDING));
 
-        debug!("{}", self.headers);
 
         let mut chunked = true;
         let mut len = 0;
@@ -142,10 +141,8 @@ impl Request<Fresh> {
             }
         }
 
-        for (name, header) in self.headers.iter() {
-            try_io!(write!(self.body, "{}: {}", name, header));
-            try_io!(self.body.write(LINE_ENDING));
-        }
+        debug!("headers [\n{}]", self.headers);
+        try_io!(write!(self.body, "{}", self.headers));
 
         try_io!(self.body.write(LINE_ENDING));
 

src/header/mod.rs

@@ -17,7 +17,7 @@ use std::sync::RWLock;
 use uany::{UncheckedAnyDowncast, UncheckedAnyMutDowncast};
 use typeable::Typeable;
 
-use http::read_header;
+use http::{read_header, LineEnding};
 use {HttpResult};
 
 /// Common Headers
@@ -244,11 +244,10 @@ impl Headers {
 
 impl fmt::Show for Headers {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        try!("Headers {\n".fmt(fmt));
         for (k, v) in self.iter() {
-            try!(write!(fmt, "\t{}: {}\n", k, v));
+            try!(write!(fmt, "{}: {}{}", k, v, LineEnding));
         }
-        "}".fmt(fmt)
+        Ok(())
     }
 }
 
@@ -349,7 +348,7 @@ mod tests {
     use mime::{Mime, Text, Plain};
     use super::CaseInsensitive;
     use super::{Headers, Header};
-    use super::common::{ContentLength, ContentType, Accept};
+    use super::common::{ContentLength, ContentType, Accept, Host};
 
     fn mem(s: &str) -> MemReader {
         MemReader::new(s.as_bytes().to_vec())
@@ -443,5 +442,20 @@ mod tests {
         *headers.get_mut::<ContentLength>().unwrap() = ContentLength(20);
         assert_eq!(*headers.get::<ContentLength>().unwrap(), ContentLength(20));
     }
+
+    #[test]
+    fn test_headers_show() {
+        let mut headers = Headers::new();
+        headers.set(ContentLength(15));
+        headers.set(Host("foo.bar".into_string()));
+
+        let s = headers.to_string();
+        // hashmap's iterators have arbitrary order, so we must sort first
+        let mut pieces = s[].split_str("\r\n").collect::<Vec<&str>>();
+        pieces.sort();
+        let s = pieces.into_iter().rev().collect::<Vec<&str>>().connect("\r\n");
+        assert_eq!(s[], "Host: foo.bar\r\nContent-Length: 15\r\n");
+
+    }
 }
 

src/http.rs

@@ -1,5 +1,6 @@
 //! Pieces pertaining to the HTTP message protocol.
 use std::cmp::min;
+use std::fmt;
 use std::io::{mod, Reader, IoResult};
 use std::u16;
 
@@ -211,6 +212,23 @@ pub const LF: u8 = b'\n';
 pub const STAR: u8 = b'*';
 pub const LINE_ENDING: &'static [u8] = &[CR, LF];
 
+/// A `Show`able struct to easily write line endings to a formatter.
+pub struct LineEnding;
+
+impl fmt::Show for LineEnding {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        fmt.write(LINE_ENDING)
+    }
+}
+
+impl Slice<u8> for LineEnding {
+    fn as_slice(&self) -> &[u8] {
+        LINE_ENDING
+    }
+}
+
+
+
 /// Determines if byte is a token char.
 ///
 /// > ```notrust

src/server/response.rs

@@ -97,11 +97,9 @@ impl Response<Fresh> {
             }
         }
 
-        for (name, header) in self.headers.iter() {
-            debug!("header {}: {}", name, header);
-            try!(write!(self.body, "{}: {}", name, header));
-            try!(self.body.write(LINE_ENDING));
-        }
+
+        debug!("headers [\n{}]", self.headers);
+        try!(write!(self.body, "{}", self.headers));
 
         try!(self.body.write(LINE_ENDING));