Refactor packages to have more idiomatic code base

1 files changed, 82 insertions, 0 deletions

diff --git a/http/handler/response.go b/http/handler/response.go
new file mode 100644
index 00000000..34980a36
--- /dev/null
+++ b/http/handler/response.go
@@ -0,0 +1,82 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package handler
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/miniflux/miniflux/template"
+)
+
+// Response handles HTTP responses.
+type Response struct {
+	writer   http.ResponseWriter
+	request  *http.Request
+	template *template.Engine
+}
+
+// SetCookie send a cookie to the client.
+func (r *Response) SetCookie(cookie *http.Cookie) {
+	http.SetCookie(r.writer, cookie)
+}
+
+// JSON returns a JSONResponse.
+func (r *Response) JSON() *JSONResponse {
+	r.commonHeaders()
+	return NewJSONResponse(r.writer, r.request)
+}
+
+// HTML returns a HTMLResponse.
+func (r *Response) HTML() *HTMLResponse {
+	r.commonHeaders()
+	return &HTMLResponse{writer: r.writer, request: r.request, template: r.template}
+}
+
+// XML returns a XMLResponse.
+func (r *Response) XML() *XMLResponse {
+	r.commonHeaders()
+	return &XMLResponse{writer: r.writer, request: r.request}
+}
+
+// Redirect redirects the user to another location.
+func (r *Response) Redirect(path string) {
+	http.Redirect(r.writer, r.request, path, http.StatusFound)
+}
+
+// NotModified sends a response with a 304 status code.
+func (r *Response) NotModified() {
+	r.commonHeaders()
+	r.writer.WriteHeader(http.StatusNotModified)
+}
+
+// Cache returns a response with caching headers.
+func (r *Response) Cache(mimeType, etag string, content []byte, duration time.Duration) {
+	r.writer.Header().Set("Content-Type", mimeType)
+	r.writer.Header().Set("ETag", etag)
+	r.writer.Header().Set("Cache-Control", "public")
+	r.writer.Header().Set("Expires", time.Now().Add(duration).Format(time.RFC1123))
+
+	if etag == r.request.Header.Get("If-None-Match") {
+		r.writer.WriteHeader(http.StatusNotModified)
+	} else {
+		r.writer.Write(content)
+	}
+}
+
+func (r *Response) commonHeaders() {
+	r.writer.Header().Set("X-XSS-Protection", "1; mode=block")
+	r.writer.Header().Set("X-Content-Type-Options", "nosniff")
+	r.writer.Header().Set("X-Frame-Options", "DENY")
+
+	// Even if the directive "frame-src" has been deprecated in Firefox,
+	// we keep it to stay compatible with other browsers.
+	r.writer.Header().Set("Content-Security-Policy", "default-src 'self'; img-src *; media-src *; frame-src *; child-src *")
+}
+
+// NewResponse returns a new Response.
+func NewResponse(w http.ResponseWriter, r *http.Request, template *template.Engine) *Response {
+	return &Response{writer: w, request: r, template: template}
+}