refactoring favicon fetcher

src/main/java/com/commafeed/frontend/utils/FetchFavicon.java

@@ -1,150 +0,0 @@
-package com.commafeed.frontend.utils;
-
-import java.net.MalformedURLException;
-import java.net.URL;
-
-import org.jsoup.Connection.Response;
-import org.jsoup.Jsoup;
-import org.jsoup.nodes.Document;
-import org.jsoup.select.Elements;
-
-//Inspired/Ported from https://github.com/potatolondon/getfavicon
-public class FetchFavicon {
-	void inf(String message) {
-		//
-	}
-
-	static long MIN_ICON_LENGTH = 100;
-	static long MAX_ICON_LENGTH = 20000;
-	static String[] ICON_MIMETYPES = new String[] { "image/x-icon",
-			"image/vnd.microsoft.icon", "image/ico", "image/icon", "text/ico",
-			"application/ico", "image/x-ms-bmp", "image/x-bmp", "image/gif",
-			"image/png", "image/jpeg" };
-
-	static String[] ICON_MIMETYPE_BLACKLIST = new String[] { "application/xml",
-			"text/html" };
-
-	boolean in(String[] array, String value) {
-		for (String i : array) {
-			if (i.equals(value)) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	boolean isValidIconResponse(Response iconResponse) {
-		long iconLength = iconResponse.bodyAsBytes().length;
-
-		String iconContentType = iconResponse.header("Content-Type");
-		if (!iconContentType.isEmpty())
-			iconContentType = iconContentType.split(";")[0];
-
-		if (iconResponse.statusCode() != 200) {
-			inf("Status code isn't 200");
-			return false;
-		}
-
-		if (in(ICON_MIMETYPE_BLACKLIST, iconContentType)) {
-			inf("Content-Type in ICON_MIMETYPE_BLACKLIST");
-			return false;
-		}
-
-		if (iconLength < MIN_ICON_LENGTH) {
-			inf("Length below MIN_ICON_LENGTH");
-			return false;
-		}
-
-		if (iconLength > MAX_ICON_LENGTH) {
-			inf("Length greater than MAX_ICON_LENGTH");
-			return false;
-		}
-		return true;
-	}
-
-	byte[] iconAtRoot(String targetPath) {
-		Response rootIconPath;
-		try {
-			URL url = new URL(new URL(targetPath), "/favicon.ico");
-			inf(url.toString());
-			rootIconPath = Jsoup
-					.connect(url.toString())
-					.followRedirects(true)
-					.ignoreContentType(true).execute();
-		} catch (Exception e) {
-			inf("Failed to retrieve iconAtRoot");
-			return null;
-		}
-
-		if (isValidIconResponse(rootIconPath)) {
-			return rootIconPath.bodyAsBytes();
-		}
-		return null;
-	}
-
-	byte[] iconInPage(String targetPath) {
-		inf("iconInPage, trying " + targetPath);
-
-		Document pageSoup;
-		try {
-			pageSoup = Jsoup.connect(targetPath).followRedirects(true).get();
-		} catch (Exception e) {
-			inf("Failed to retrieve page to find icon");
-			return null;
-		}
-
-		Elements pageSoupIcon = pageSoup
-				.select("link[rel~=(?i)^(shortcut|icon|shortcut icon)$]");
-
-		if (pageSoupIcon.size() == 0) {
-			return null;
-		}
-		String pageIconHref = pageSoupIcon.get(0).attr("href");
-		String pageIconPath;
-		if (pageIconHref.isEmpty()) {
-			inf("No icon found in page");
-			return null;
-		}
-
-		try {
-			pageIconPath = new URL(new URL(targetPath), pageIconHref).toString();
-		} catch (MalformedURLException e1) {
-			inf("URL concatination faild");
-			return null;
-		}
-
-		inf("Found unconfirmed iconInPage at");
-
-		Response pagePathFaviconResult;
-		try {
-			pagePathFaviconResult = Jsoup.connect(pageIconPath)
-					.followRedirects(true).ignoreContentType(true)
-					.execute();
-		} catch (Exception e) {
-			inf("Failed to retrieve icon found in page");
-			return null;
-		}
-
-		if (isValidIconResponse(pagePathFaviconResult)) {
-			return pagePathFaviconResult.bodyAsBytes();
-		}
-		inf("Invalid icon found");
-		return null;
-	}
-
-	public byte[] get(String targetPath) {
-		byte[] icon;
-
-		icon = iconAtRoot(targetPath);
-		if (icon != null) {
-			return icon;
-		}
-
-		icon = iconInPage(targetPath);
-		if (icon != null) {
-			return icon;
-		}
-
-		return null; // or returning default feed
-	}
-}