Make Response::from_html use text/html; charset=utf-8 (#447)

* Make Response::from_html use `text/html; charset=utf-8`

* Make Response::ok use `text/plain; charset=utf-8`

* Fix code formatting

Author: kpcyrd

examples/hyper/src/lib.rs

@@ -20,7 +20,9 @@ async fn make_request(
         .map_err(map_hyper_error)?;
     let text = std::str::from_utf8(&buf).map_err(map_utf8_error)?;
     let mut response = Response::ok(text)?;
-    response.headers_mut().append("Content-Type", "text/html")?;
+    response
+        .headers_mut()
+        .append("Content-Type", "text/html; charset=utf-8")?;
     Ok(response)
 }
 #[event(fetch)]

worker/src/response.rs

@@ -52,10 +52,10 @@ impl Response {
     }
 
     /// Create a `Response` using the body encoded as HTML. Sets the associated `Content-Type`
-    /// header for the `Response` as `text/html`.
+    /// header for the `Response` as `text/html; charset=utf-8`.
     pub fn from_html(html: impl AsRef<str>) -> Result<Self> {
         let mut headers = Headers::new();
-        headers.set(CONTENT_TYPE, "text/html")?;
+        headers.set(CONTENT_TYPE, "text/html; charset=utf-8")?;
 
         let data = html.as_ref().as_bytes().to_vec();
         Ok(Self {
@@ -130,10 +130,10 @@ impl Response {
     }
 
     /// Create a `Response` using unprocessed text provided. Sets the associated `Content-Type`
-    /// header for the `Response` as `text/plain`.
+    /// header for the `Response` as `text/plain; charset=utf-8`.
     pub fn ok(body: impl Into<String>) -> Result<Self> {
         let mut headers = Headers::new();
-        headers.set(CONTENT_TYPE, "text/plain")?;
+        headers.set(CONTENT_TYPE, "text/plain; charset=utf-8")?;
 
         Ok(Self {
             body: ResponseBody::Body(body.into().into_bytes()),