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Allow HTTP <--> HTTPS redirects (max 3) in Download class.

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Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>
This commit is contained in:
Jeffrey Han 2015-08-08 17:08:36 -05:00
parent b98c646106
commit b9adf59d53
1 changed files with 52 additions and 5 deletions
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51
src/itdelatrisu/opsu/downloads/Download.java
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@ -46,6 +46,9 @@ public class Download {
/** Read timeout, in ms. */
public static final int READ_TIMEOUT = 10000;
/** Maximum number of HTTP/HTTPS redirects to follow. */
public static final int MAX_REDIRECTS = 3;
/** Time between download speed and ETA updates, in ms. */
private static final int UPDATE_INTERVAL = 1000;
@ -172,13 +175,57 @@ public class Download {
new Thread() {
@Override
public void run() {
// open connection, get content length
// open connection
HttpURLConnection conn = null;
try {
conn = (HttpURLConnection) url.openConnection();
URL downloadURL = url;
int redirectCount = 0;
boolean isRedirect = false;
do {
isRedirect = false;
conn = (HttpURLConnection) downloadURL.openConnection();
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setReadTimeout(READ_TIMEOUT);
conn.setUseCaches(false);
// allow HTTP <--> HTTPS redirects
// http://download.java.net/jdk7u2/docs/technotes/guides/deployment/deployment-guide/upgrade-guide/article-17.html
conn.setInstanceFollowRedirects(false);
conn.setRequestProperty("User-Agent", "Mozilla/5.0...");
// check for redirect
int status = conn.getResponseCode();
if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM ||
status == HttpURLConnection.HTTP_SEE_OTHER || status == HttpURLConnection.HTTP_USE_PROXY) {
URL base = conn.getURL();
String location = conn.getHeaderField("Location");
URL target = null;
if (location != null)
target = new URL(base, location);
conn.disconnect();
// check for problems
String error = null;
if (location == null)
error = String.format("Download for URL '%s' is attempting to redirect without a 'location' header.", base.toString());
else if (!target.getProtocol().equals("http") && !target.getProtocol().equals("https"))
error = String.format("Download for URL '%s' is attempting to redirect to a non-HTTP/HTTPS protocol '%s'.", base.toString(), target.getProtocol());
else if (redirectCount > MAX_REDIRECTS)
error = String.format("Download for URL '%s' is attempting too many redirects (over %d).", base.toString(), MAX_REDIRECTS);
if (error != null) {
ErrorHandler.error(error, null, false);
throw new IOException();
}
// follow redirect
downloadURL = target;
redirectCount++;
isRedirect = true;
}
} while (isRedirect);
// store content length
contentLength = conn.getContentLength();
} catch (IOException e) {
status = Status.ERROR;