feat: provide basic data getters

- c.Query(), from URL query string - c.PostFormValue(), from POST form -
c.FormValue(), from both URL query and POST form - c.BindJSON(), from request
body

3 files changed, 42 insertions, 1 deletions

diff --git a/context.go b/context.go
index 6241179..a364e5d 100644
--- a/context.go
+++ b/context.go
@@ -80,7 +80,7 @@ func (c *Context) InternalError(msg string) {
 	c.Error(http.StatusInternalServerError, msg)
 }
 
-/* Cookies */
+/* === Cookies === */
 
 func (c *Context) Cookies() []*http.Cookie {
 	return c.R.Cookies()
@@ -111,3 +111,35 @@ func (c *Context) SetCookie(name string, value string) {
 	}
 	c.SetCompleteCookie(&cookie)
 }
+
+/* === Request Data === */
+
+// Context.FormValue gets value from request form
+// form contains URL querys and POST Form value
+//
+// alias of 'c.Form[key]`
+func (c *Context) FormValue(key string) string {
+	return c.Form.Get(key)
+}
+
+// Context.PostFormValue works similarly to Context.FormValue
+// but it does NOT contain URL querys, only POST form
+func (c *Context) PostFormValue(key string) string {
+	return c.R.PostFormValue(key)
+}
+
+// Context.Query gets value from request URL query
+//
+// alias of 'c.Querys[key]'
+func (c *Context) Query(key string) string {
+	return c.Querys.Get(key)
+}
+
+// Context.BindJSON takes the container for JSON data
+// decodes request body and then writes data to container
+func (c *Context) BindJSON(v any) error {
+	c.R.Body = http.MaxBytesReader(c.W, c.R.Body, 2<<20)
+	dec := json.NewDecoder(c.R.Body)
+	dec.DisallowUnknownFields()
+	return dec.Decode(v)
+}
diff --git a/engine.go b/engine.go
index 6fc1060..4d44fa1 100644
--- a/engine.go
+++ b/engine.go
@@ -38,11 +38,19 @@ func (a *Engine) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		http.NotFound(w, req)
 		return
 	}
+
+	err := req.ParseForm()
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
 	handler(&Context{
 		W:      w,
 		R:      req,
 		Params: params,
 		Querys: req.URL.Query(),
+		Form:   req.Form,
 	})
 }
 
diff --git a/types.go b/types.go
index 36e4f13..93f1487 100644
--- a/types.go
+++ b/types.go
@@ -10,6 +10,7 @@ type Context struct {
 	R      *http.Request
 	Params map[string]string
 	Querys url.Values
+	Form   url.Values
 }
 
 type Handler func(c *Context)