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proxy images through commafeed (#231)

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Athou
2013-06-22 21:36:55 +02:00
parent ab51b63b39
commit 52e4a2a0b7
10 changed files with 118 additions and 8 deletions
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56
src/main/java/com/commafeed/backend/feeds/FeedUtils.java
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@@ -21,6 +21,7 @@ import org.jsoup.nodes.Element;
import org.jsoup.nodes.Entities.EscapeMode;
import org.jsoup.safety.Cleaner;
import org.jsoup.safety.Whitelist;
import org.jsoup.select.Elements;
import org.mozilla.universalchardet.UniversalDetector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -30,6 +31,7 @@ import org.w3c.dom.css.CSSStyleDeclaration;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedEntry;
import com.commafeed.backend.model.FeedSubscription;
import com.google.api.client.util.Base64;
import com.google.api.client.util.Lists;
import com.google.gwt.i18n.client.HasDirection.Direction;
import com.google.gwt.i18n.shared.BidiUtils;
@@ -38,6 +40,7 @@ import com.steadystate.css.parser.CSSOMParser;
public class FeedUtils {
protected static Logger log = LoggerFactory.getLogger(FeedUtils.class);
private static final List<String> ALLOWED_IFRAME_CSS_RULES = Arrays.asList(
"height", "width", "border");
private static final char[] DISALLOWED_IFRAME_CSS_RULE_CHARACTERS = new char[] {
@@ -358,4 +361,57 @@ public class FeedUtils {
+ subscription.getId();
}
public static String proxyImages(String content, String publicUrl,
boolean proxyImages) {
if (!proxyImages) {
return content;
}
if (StringUtils.isBlank(content)) {
return content;
}
log.info("cc");
Document doc = Jsoup.parse(content);
Elements elements = doc.select("img");
log.info("{}", elements.size());
for (Element element : elements) {
String href = element.attr("src");
log.info(href);
if (href != null) {
String proxy = removeTrailingSlash(publicUrl) + "/rest/server/proxy?u="
+ imageProxyEncoder(href);
log.info(proxy);
element.attr("src", proxy);
}
}
return doc.body().html();
}
public static String rot13(String msg) {
StringBuilder message = new StringBuilder();
for (char c : msg.toCharArray()) {
if (c >= 'a' && c <= 'm')
c += 13;
else if (c >= 'n' && c <= 'z')
c -= 13;
else if (c >= 'A' && c <= 'M')
c += 13;
else if (c >= 'N' && c <= 'Z')
c -= 13;
message.append(c);
}
return message.toString();
}
public static String imageProxyEncoder(String url) {
return Base64.encodeBase64String(rot13(url).getBytes());
}
public static String imageProxyDecoder(String code) {
return rot13(new String(Base64.decodeBase64(code)));
}
}