Connection timeout when downloading file

Leo C.6

Good Morning,

I got the SocketTimeoutException while I am trying to get file from dropbox account:

The code works normally on my local PC, but throws exception on hosting company's server

Do I need to do any firewall configure before I can download file from core API?

com.dropbox.core.DbxException$NetworkIO: java.net.SocketTimeoutException: connect timed out
    at com.dropbox.core.DbxRequestUtil.startGet(DbxRequestUtil.java:119)
    at com.dropbox.core.DbxClient.startGetSomething(DbxClient.java:403)
    at com.dropbox.core.DbxClient.startGetFile(DbxClient.java:391)
    at com.dropbox.core.DbxClient.getFile(DbxClient.java:345)
    at hk.org.ha.pbrc.dashboard.servlet.PmiMeasureServlet.toString(PmiMeasureServlet.java:75)
    at hk.org.ha.pbrc.dashboard.servlet.MeasurementServlet.doGet(MeasurementServlet.java:27)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:275)
    at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:371)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:975)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
    at com.dropbox.core.http.StandardHttpRequestor.doGet(StandardHttpRequestor.java:82)
    at com.dropbox.core.DbxRequestUtil.startGet(DbxRequestUtil.java:116)
    ... 27 more

Thanks in advance

Leo

Greg-DB

To use the Dropbox Core API, you need to be able to make HTTPS connections to (depending on which API calls you're making):

• api.dropbox.com
• api-content.dropbox.com
• api-notify.dropbox.com

For downloading files in particular, the relevant one is api-content.dropbox.com .

Are you able to access that from the server? (E.g., try using curl to access it directly.)