add: remove_http_request_header convenient func

Signed-off-by: nbn01 <[email protected]>

src/hostcalls.rs

@@ -318,6 +318,15 @@ pub fn set_map_value(map_type: MapType, key: &str, value: Option<&str>) -> Resul
     }
 }
 
+pub fn remove_map_value(map_type: MapType, key: &str) -> Result<(), Status> {
+    unsafe {
+        match proxy_remove_header_map_value(map_type, key.as_ptr(), key.len()) {
+            Status::Ok => Ok(()),
+            status => panic!("unexpected status: {}", status as u32),
+        }
+    }
+}
+
 pub fn set_map_value_bytes(
     map_type: MapType,
     key: &str,

src/traits.rs

@@ -351,6 +351,10 @@ pub trait HttpContext: Context {
         hostcalls::add_map_value_bytes(MapType::HttpRequestHeaders, name, value).unwrap()
     }
 
+    fn remove_http_request_header(&self, name: &str) {
+        hostcalls::remove_map_value(MapType::HttpRequestHeaders, name).unwrap()
+    }
+
     fn on_http_request_body(&mut self, _body_size: usize, _end_of_stream: bool) -> Action {
         Action::Continue
     }