Apply connect and read timeouts uniformly.

Also use a 5 second connect/read timeout when detecting a proxy, to avoid
lengthy stalls.

src/main/java/com/threerings/getdown/data/Application.java

@@ -1241,7 +1241,7 @@ public class Application
                 InputStream in = null;
                 PrintStream out = null;
                 try {
-                    in = ConnectionUtil.open(_latest).getInputStream();
+                    in = ConnectionUtil.open(_latest, 0, 0).getInputStream();
                     BufferedReader bin = new BufferedReader(new InputStreamReader(in));
                     for (String[] pair : ConfigUtil.parsePairs(bin, ConfigUtil.createOpts(false))) {
                         if (pair[0].equals("version")) {
@@ -1648,18 +1648,13 @@ public class Application
         InputStream fin = null;
         FileOutputStream fout = null;
         try {
-            URLConnection uconn = ConnectionUtil.open(targetURL);
+            URLConnection uconn = ConnectionUtil.open(targetURL, 0, 0);
             // we have to tell Java not to use caches here, otherwise it will cache any request for
             // same URL for the lifetime of this JVM (based on the URL string, not the URL object);
             // if the getdown.txt file, for example, changes in the meanwhile, we would never hear
             // about it; turning off caches is not a performance concern, because when Getdown asks
             // to download a file, it expects it to come over the wire, not from a cache
             uconn.setUseCaches(false);
-            // configure a connect timeout if requested
-            int ctimeout = SysProps.connectTimeout();
-            if (ctimeout > 0) {
-                uconn.setConnectTimeout(ctimeout * 1000);
-            }
             fin = uconn.getInputStream();
             fout = new FileOutputStream(target);
             StreamUtil.copy(fin, fout);

src/main/java/com/threerings/getdown/launcher/Getdown.java

@@ -324,8 +324,8 @@ public abstract class Getdown extends Thread
 
         URL rurl = _app.getConfigResource().getRemote();
         try {
-            // try to make a HEAD request for this URL
-            URLConnection conn = ConnectionUtil.open(rurl);
+            // try to make a HEAD request for this URL (use short connect and read timeouts)
+            URLConnection conn = ConnectionUtil.open(rurl, 5, 5);
             if (conn instanceof HttpURLConnection) {
                 HttpURLConnection hcon = (HttpURLConnection)conn;
                 try {
@@ -1215,7 +1215,7 @@ public abstract class Getdown extends Thread
         @Override
         public void run () {
             try {
-                HttpURLConnection ucon = ConnectionUtil.openHttp(_url);
+                HttpURLConnection ucon = ConnectionUtil.openHttp(_url, 0, 0);
 
                 // if we have a tracking cookie configured, configure the request with it
                 if (_app.getTrackingCookieName() != null &&

src/main/java/com/threerings/getdown/net/HTTPDownloader.java

@@ -34,7 +34,7 @@ public class HTTPDownloader extends Downloader
     protected long checkSize (Resource rsrc)
         throws IOException
     {
-        URLConnection conn = ConnectionUtil.open(rsrc.getRemote());
+        URLConnection conn = ConnectionUtil.open(rsrc.getRemote(), 0, 0);
         try {
             // if we're accessing our data via HTTP, we only need a HEAD request
             if (conn instanceof HttpURLConnection) {
@@ -60,11 +60,7 @@ public class HTTPDownloader extends Downloader
         throws IOException
     {
         // download the resource from the specified URL
-        URLConnection conn = ConnectionUtil.open(rsrc.getRemote());
-        int rtimeout = SysProps.readTimeout();
-        if (rtimeout > 0) {
-            conn.setReadTimeout(rtimeout * 1000);
-        }
+        URLConnection conn = ConnectionUtil.open(rsrc.getRemote(), 0, 0);
         conn.connect();
 
         // make sure we got a satisfactory response code

src/main/java/com/threerings/getdown/util/ConnectionUtil.java

@@ -13,16 +13,37 @@ import java.net.URLDecoder;
 
 import org.apache.commons.codec.binary.Base64;
 
+import com.threerings.getdown.data.SysProps;
+
 public class ConnectionUtil
 {
     /**
      * Opens a connection to a URL, setting the authentication header if user info is present.
+     * @param url the URL to which to open a connection.
+     * @param connectTimeout if {@code > 0} then a timeout, in seconds, to use when opening the
+     * connection. If {@code 0} is supplied, the connection timeout specified via system properties
+     * will be used instead.
+     * @param readTimeout if {@code > 0} then a timeout, in seconds, to use while reading data from
+     * the connection. If {@code 0} is supplied, the read timeout specified via system properties
+     * will be used instead.
      */
-    public static URLConnection open (URL url)
+    public static URLConnection open (URL url, int connectTimeout, int readTimeout)
         throws IOException
     {
         URLConnection conn = url.openConnection();
 
+        // configure a connect timeout, if requested
+        int ctimeout = connectTimeout > 0 ? connectTimeout : SysProps.connectTimeout();
+        if (ctimeout > 0) {
+            conn.setConnectTimeout(ctimeout * 1000);
+        }
+
+        // configure a read timeout, if requested
+        int rtimeout = readTimeout > 0 ? readTimeout : SysProps.readTimeout();
+        if (rtimeout > 0) {
+            conn.setReadTimeout(rtimeout * 1000);
+        }
+
         // If URL has a username:password@ before hostname, use HTTP basic auth
         String userInfo = url.getUserInfo();
         if (userInfo != null) {
@@ -38,12 +59,13 @@ public class ConnectionUtil
     }
 
     /**
-     * Opens a connection to a http or https URL, setting the authentication header if user info
-     * is present. Throws a class cast exception if the connection returned is not the right type.
+     * Opens a connection to a http or https URL, setting the authentication header if user info is
+     * present. Throws a class cast exception if the connection returned is not the right type. See
+     * {@link #open} for parameter documentation.
      */
-    public static HttpURLConnection openHttp (URL url)
+    public static HttpURLConnection openHttp (URL url, int connectTimeout, int readTimeout)
         throws IOException
     {
-        return (HttpURLConnection)open(url);
+        return (HttpURLConnection)open(url, connectTimeout, readTimeout);
     }
 }