I use HttpURLConnection to crawler https://translate.google.com/ .
InetSocketAddress addr = new InetSocketAddress("127.0.0.1", 1082);
Proxy proxy = new Proxy(Proxy.Type.HTTP, addr);
url = new URL("https://translate.google.com/");
HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);
conn.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("User-Agent",
"Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.76 Mobile Safari/537.36");
conn.setRequestProperty("Accept", "*/*");
Map<String, List<String>> reqHeaders = conn.getHeaderFields();
List<String> reqTypes = reqHeaders.get("Content-Type");
for (String ss : reqTypes) {
System.out.println(ss);
}
InputStream in = conn.getInputStream();
String s = IOUtils.toString(in, "UTF-8");
System.out.println(s.substring(0, 100));
Map<String, List<String>> resHeader = conn.getHeaderFields();
List<String> resTypes = resHeader.get("Content-Type");
for (String ss : resTypes) {
System.out.println(ss);
}
Console is
But When I change url to http://translate.google.com/ . It works well.
I know actually HttpURLConnection is HttpsURLConnection when i crawler https://translate.google.com/ . I try to use HttpsURLConnection and it still garbled.
Any suggestions?
conn.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
The response is compressed, because the above line tells the server that the client is able to understand encodings specified in Accept-Encoding
.
Try to comment this line or handle this situation.
There's a more specific implementation for HTTPS ie HttpsURLConnection
, in case you're interested in https-specific features, eg:
import javax.net.ssl.HttpsURLConnection;
....
URL url = new URL("https://www.google.com/");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
I accept Jerry Chin's answer.Solves my problem. My answer just recording how i resolve this problem. If this approach is unreasonable.Let me know, I'll remove this answer.
conn.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
And then I check response Content-Encoding.It's gzip.
So i use GZIPInputStream to receive.
InputStream in = conn.getInputStream();
GZIPInputStream gzis=new GZIPInputStream(in);
InputStreamReader reader = new InputStreamReader(gzis);
BufferedReader br = new BufferedReader(reader);
The InputStream is normal.
BTW,If you don't need Accept-Encoding,you can remove it.
And do not forget check user-agent. It's very important and different operating systems corresponding to different user-agent.
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