Add readability package to fetch original content

reader/scraper/scraper.go

@@ -0,0 +1,38 @@
+// 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 scraper
+
+import (
+	"errors"
+
+	"github.com/miniflux/miniflux2/http"
+	"github.com/miniflux/miniflux2/reader/readability"
+	"github.com/miniflux/miniflux2/reader/sanitizer"
+)
+
+// Fetch download a web page a returns relevant contents.
+func Fetch(websiteURL string) (string, error) {
+	client := http.NewClient(websiteURL)
+	response, err := client.Get()
+	if err != nil {
+		return "", err
+	}
+
+	if response.HasServerFailure() {
+		return "", errors.New("unable to download web page")
+	}
+
+	page, err := response.NormalizeBodyEncoding()
+	if err != nil {
+		return "", err
+	}
+
+	content, err := readability.ExtractContent(page)
+	if err != nil {
+		return "", err
+	}
+
+	return sanitizer.Sanitize(websiteURL, content), nil
+}