/*
* Copyright (C) 2010 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.client.android.result.supplement;
import java.io.IOException;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpUriRequest;
import org.oskardroid.pg.R;
import android.content.Context;
import android.os.Handler;
import android.widget.TextView;
import com.google.zxing.client.android.AndroidHttpClient;
import com.google.zxing.client.result.URIParsedResult;
final class URIResultInfoRetriever extends SupplementalInfoRetriever {
private static final String[] REDIRECTOR_HOSTS = {
"http://bit.ly/",
"http://tinyurl.com/",
"http://tr.im/",
"http://goo.gl/",
"http://ow.ly/",
};
private final URIParsedResult result;
private final String redirectString;
URIResultInfoRetriever(TextView textView, URIParsedResult result, Handler handler,
Context context) {
super(textView, handler, context);
redirectString = context.getString(R.string.msg_redirect);
this.result = result;
}
@Override
void retrieveSupplementalInfo() throws IOException, InterruptedException {
String oldURI = result.getURI();
String newURI = unredirect(oldURI);
int count = 0;
while (count < 3 && !oldURI.equals(newURI)) {
append(redirectString + ": " + newURI);
count++;
oldURI = newURI;
newURI = unredirect(newURI);
}
setLink(newURI);
}
private static String unredirect(String uri) throws IOException {
if (!isRedirector(uri)) {
return uri;
}
HttpUriRequest head = new HttpHead(uri);
AndroidHttpClient client = AndroidHttpClient.newInstance(null);
HttpResponse response = client.execute(head);
int status = response.getStatusLine().getStatusCode();
if (status == 301 || status == 302) {
Header redirect = response.getFirstHeader("Location");
if (redirect != null) {
String location = redirect.getValue();
if (location != null) {
return location;
}
}
}
return uri;
}
private static boolean isRedirector(String uri) {
for (String redirectorHost : REDIRECTOR_HOSTS) {
if (uri.startsWith(redirectorHost)) {
return true;
}
}
return false;
}
}