feat: betterified the contents.Type and context way to set content type.

contents/main.go

@@ -1,25 +1,29 @@
 package contents
 
-import (
+type Option interface {
-)
+	KeyValue() [2]string
+}
 
 type CharSet string
 const (
 	Utf8 = "utf-8"
 )
+func (cs CharSet) KeyValue() [2]string {
+	return [2]string{
+		"charset",
+		string(cs),
+	}
+}
 
 type Type string
 const (
 	// Using the UTF-8 by default.
 	Unknown Type = "application/octet-stream"
 	Binary
-	Plain Type = "text/plain"
+	Plain= "text/plain"
-	Css Type = "text/css"
+	Css= "text/css"
-	Html Type = "text/html"
+	Html= "text/html"
-	Json Type = "application/json"
+	Json= "application/json"
-	UrlEncoded = "application/x-www-form-urlencoded"
+	UrlEncoded= "application/x-www-form-urlencoded"
 )
 
-func (t Type) CharSet(set CharSet) Type {
-	return t + ";" + Type(set)
-}

context.go

@@ -2,6 +2,7 @@ package bond
 
 import (
 	"io"
+	"strings"
 	"encoding/json"
 	"net/http"
 	"net/url"
@@ -31,12 +32,17 @@ func (c *Context) SetStatus(status Status) {
 }
 
 // Set the reply content type.
-func (c *Context) SetContentType(typ contents.Type) {
+func (c *Context) SetContentType(typ contents.Type, opts ...contents.Option) {
-	c.SetHeader("Content-Type", string(typ))
+	ret := string(typ)
+	for _, opt := range opts {
+		kv := opt.KeyValue()
+		ret += ";"+kv[0]+"="+kv[1]
+	}
+	c.SetHeader("Content-Type", ret)
 }
 
 // Get the request content type.
-func (c *Context) ContentType() ContentType {
+func (c *Context) ContentType() contents.Type {
 	ret, ok := c.Header("Content-Type")
 	if !ok {
 		return ""
@@ -44,7 +50,11 @@ func (c *Context) ContentType() ContentType {
 	if len(ret) < 1 {
 		return ""
 	}
-	return contents.Type(ret[0])
+	splits := strings.SplitN(ret[0], ";", 2)
+	if len(splits) < 0 {
+		return ""
+	}
+	return contents.Type(splits[0])
 }
 
 func (c *Context) SetHeader(k, v string) {
@@ -114,6 +124,18 @@ func (c *Context) NotFound() {
 	http.NotFound(c.W, c.R)
 }
 
+func (c *Context) InternalServerError(err error) {
+	c.W.WriteHeader(http.StatusInternalServerError)
+	if err != nil {
+		c.Printf("500 Internal Server Error: %q", err)
+	} else {
+	}
+}
+
+func (c *Context) Print(v ...any) (int, error) {
+	return fmt.Print(v...)
+}
+
 func (c *Context) Printf(format string, v ...any) (int, error) {
 	return fmt.Fprintf(c.W, format, v...)
 }