fix: Context.Bind

pkg/net/http/blademaster/context.go

@@ -276,9 +276,17 @@ func (c *Context) BindWith(obj interface{}, b binding.Binding) error {
 	return c.mustBindWith(obj, b)
 }
 
-// Bind bind req arg with defult form binding.
+// Bind checks the Content-Type to select a binding engine automatically,
+// Depending the "Content-Type" header different bindings are used:
+//     "application/json" --> JSON binding
+//     "application/xml"  --> XML binding
+// otherwise --> returns an error.
+// It parses the request's body as JSON if Content-Type == "application/json" using JSON or XML as a JSON input.
+// It decodes the json payload into the struct specified as a pointer.
+// It writes a 400 error and sets Content-Type header "text/plain" in the response if input is not valid.
 func (c *Context) Bind(obj interface{}) error {
-	return c.mustBindWith(obj, binding.Form)
+	b := binding.Default(c.Request.Method, c.Request.Header.Get("Content-Type"))
+	return c.mustBindWith(obj, b)
 }
 
 // mustBindWith binds the passed struct pointer using the specified binding engine.