Re: [android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
We are experiencing this problem occasionally on Verizon phones. We don't seem to have this issue on other networks, so it seems to be something on the carrier side. Our server does include Cache-control: no-store, no-cache in its reply header. On Friday, November 2, 2012 11:01:15 AM UTC-4, Robert Greenwalt wrote: Even if this is a carrier issue, please let us know - we'd like the carriers to do the right thing and do have some contacts to explore issues like this. Kieth, was this on mobile data or on wifi (or other)? On Fri, Nov 2, 2012 at 7:06 AM, bob b...@coolfone.comze.com javascript: wrote: Are you using WiFi or your phone's data connection? I saw this strange issue with this Origami Iris game where it would somehow load a page from the cache if I used my MetroPCS connection. Didn't happen on Wifi though. Very weird. On Friday, November 2, 2012 1:27:38 AM UTC-5, Keith Wiley wrote: A few weeks ago I mentioned that I was experiencing unwanted http caching (I mentioned it here because I wasn't sure if the cause of the problem was the Android OS performing the caching in a way that didn't make sense to me). At the time, it was suggested that I experiment with getUseCaches() and setUseCaches(). This has definitely not solved the problem. First of all, it does indeed appear that caching is enabled by default (as is GZipping the stream interestingly, I think I've read about this somewhere). However, setting caching false doesn't help. Not only does my app not confidently load an updated version of the file from the server, but it doesn't even detect that the file is gone from the server (if I change its name for example). Rather, the app still happily retrieves the cached version of the file, even though I'm calling setUseCaches(false). Does anyone have any thoughts on how else to fix this problem? I know there is a solution because the phone's web browser app (actually, I'm using Dolphin) properly loads the server version of the file every time. Once again, I don't mean to bring this up on an Android forum if it really isn't an Android issue...but I'm not sure whether the problem is coming from the Android system for some reason (I'm not sure whether I should expect my code to work in any other Java environment, just not Android). Where else might the cache be coming from if the URLConnection's useCaches variable is definitely false (verified as I step over setUseCaches(false) in the debugger)? I'm sorry if this is off-topic, I appreciate any help. Here's how I load the file: String address = httpUrlOfFileOnMyWebserver; URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); if (conn.getUseCaches()) conn.setUseCaches(false); InputStream is = (InputStream)conn.getContent()**; Reader reader = new InputStreamReader(is, UTF-8); StringWriter writer = new StringWriter(); char[] buffer = new char[1024]; for (int length = 0; (length = reader.read(buffer)) 0;) writer.write(buffer, 0, length); is.close(); reader.close(); writer.close(); String fileStr = writer.toString(); -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-d...@googlegroups.comjavascript: To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
On Friday, 16 November 2012 02:28:34 UTC+1, gt8887b wrote: We are experiencing this problem occasionally on Verizon phones. We don't seem to have this issue on other networks, so it seems to be something on the carrier side. Our server does include Cache-control: no-store, no-cache in its reply header. Note that carriers often have http proxies which can get in the way and mess stuff. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
Why was my response to this message deleted? At any rate, all I said was that I wasn't familiar with the methods you suggested and that I'll look them up. Thanks. On Friday, November 2, 2012 6:59:25 AM UTC-7, Streets Of Boston wrote: Did you try to add caching headers to the request and/or response: Your android client app' request: If-None-Match: **, If-Modified-Since: **, If-Unmodified-Since: ** Your server's response: Cache-Control: *no-cache*, ETag: *x* On Friday, November 2, 2012 2:40:57 AM UTC-4, Keith Wiley wrote: I guess one solution that seems to show promise is appending an unused randomized GET variable to the end of the URL. That seems pretty hackish though. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
I guess one solution that seems to show promise is appending an unused randomized GET variable to the end of the URL. That seems pretty hackish though. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
Did you try to add caching headers to the request and/or response: Your android client app' request: If-None-Match: **, If-Modified-Since: **, If-Unmodified-Since: ** Your server's response: Cache-Control: *no-cache*, ETag: *x* On Friday, November 2, 2012 2:40:57 AM UTC-4, Keith Wiley wrote: I guess one solution that seems to show promise is appending an unused randomized GET variable to the end of the URL. That seems pretty hackish though. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
Are you using WiFi or your phone's data connection? I saw this strange issue with this Origami Iris game where it would somehow load a page from the cache if I used my MetroPCS connection. Didn't happen on Wifi though. Very weird. On Friday, November 2, 2012 1:27:38 AM UTC-5, Keith Wiley wrote: A few weeks ago I mentioned that I was experiencing unwanted http caching (I mentioned it here because I wasn't sure if the cause of the problem was the Android OS performing the caching in a way that didn't make sense to me). At the time, it was suggested that I experiment with getUseCaches() and setUseCaches(). This has definitely not solved the problem. First of all, it does indeed appear that caching is enabled by default (as is GZipping the stream interestingly, I think I've read about this somewhere). However, setting caching false doesn't help. Not only does my app not confidently load an updated version of the file from the server, but it doesn't even detect that the file is gone from the server (if I change its name for example). Rather, the app still happily retrieves the cached version of the file, even though I'm calling setUseCaches(false). Does anyone have any thoughts on how else to fix this problem? I know there is a solution because the phone's web browser app (actually, I'm using Dolphin) properly loads the server version of the file every time. Once again, I don't mean to bring this up on an Android forum if it really isn't an Android issue...but I'm not sure whether the problem is coming from the Android system for some reason (I'm not sure whether I should expect my code to work in any other Java environment, just not Android). Where else might the cache be coming from if the URLConnection's useCaches variable is definitely false (verified as I step over setUseCaches(false) in the debugger)? I'm sorry if this is off-topic, I appreciate any help. Here's how I load the file: String address = httpUrlOfFileOnMyWebserver; URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); if (conn.getUseCaches()) conn.setUseCaches(false); InputStream is = (InputStream)conn.getContent(); Reader reader = new InputStreamReader(is, UTF-8); StringWriter writer = new StringWriter(); char[] buffer = new char[1024]; for (int length = 0; (length = reader.read(buffer)) 0;) writer.write(buffer, 0, length); is.close(); reader.close(); writer.close(); String fileStr = writer.toString(); -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
Even if this is a carrier issue, please let us know - we'd like the carriers to do the right thing and do have some contacts to explore issues like this. Kieth, was this on mobile data or on wifi (or other)? On Fri, Nov 2, 2012 at 7:06 AM, bob b...@coolfone.comze.com wrote: Are you using WiFi or your phone's data connection? I saw this strange issue with this Origami Iris game where it would somehow load a page from the cache if I used my MetroPCS connection. Didn't happen on Wifi though. Very weird. On Friday, November 2, 2012 1:27:38 AM UTC-5, Keith Wiley wrote: A few weeks ago I mentioned that I was experiencing unwanted http caching (I mentioned it here because I wasn't sure if the cause of the problem was the Android OS performing the caching in a way that didn't make sense to me). At the time, it was suggested that I experiment with getUseCaches() and setUseCaches(). This has definitely not solved the problem. First of all, it does indeed appear that caching is enabled by default (as is GZipping the stream interestingly, I think I've read about this somewhere). However, setting caching false doesn't help. Not only does my app not confidently load an updated version of the file from the server, but it doesn't even detect that the file is gone from the server (if I change its name for example). Rather, the app still happily retrieves the cached version of the file, even though I'm calling setUseCaches(false). Does anyone have any thoughts on how else to fix this problem? I know there is a solution because the phone's web browser app (actually, I'm using Dolphin) properly loads the server version of the file every time. Once again, I don't mean to bring this up on an Android forum if it really isn't an Android issue...but I'm not sure whether the problem is coming from the Android system for some reason (I'm not sure whether I should expect my code to work in any other Java environment, just not Android). Where else might the cache be coming from if the URLConnection's useCaches variable is definitely false (verified as I step over setUseCaches(false) in the debugger)? I'm sorry if this is off-topic, I appreciate any help. Here's how I load the file: String address = httpUrlOfFileOnMyWebserver; URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); if (conn.getUseCaches()) conn.setUseCaches(false); InputStream is = (InputStream)conn.getContent()**; Reader reader = new InputStreamReader(is, UTF-8); StringWriter writer = new StringWriter(); char[] buffer = new char[1024]; for (int length = 0; (length = reader.read(buffer)) 0;) writer.write(buffer, 0, length); is.close(); reader.close(); writer.close(); String fileStr = writer.toString(); -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
I don't generally use wifi unless there is an explicit reason to do so (poor cell coverage AND good wifi coverage...a rare combination). My data plan and data usage do not drive me to go to wifi (e.g. to save bandwidth). On Friday, November 2, 2012 7:06:52 AM UTC-7, bob wrote: Are you using WiFi or your phone's data connection? I saw this strange issue with this Origami Iris game where it would somehow load a page from the cache if I used my MetroPCS connection. Didn't happen on Wifi though. Very weird. On Friday, November 2, 2012 1:27:38 AM UTC-5, Keith Wiley wrote: A few weeks ago I mentioned that I was experiencing unwanted http caching (I mentioned it here because I wasn't sure if the cause of the problem was the Android OS performing the caching in a way that didn't make sense to me). At the time, it was suggested that I experiment with getUseCaches() and setUseCaches(). This has definitely not solved the problem. First of all, it does indeed appear that caching is enabled by default (as is GZipping the stream interestingly, I think I've read about this somewhere). However, setting caching false doesn't help. Not only does my app not confidently load an updated version of the file from the server, but it doesn't even detect that the file is gone from the server (if I change its name for example). Rather, the app still happily retrieves the cached version of the file, even though I'm calling setUseCaches(false). Does anyone have any thoughts on how else to fix this problem? I know there is a solution because the phone's web browser app (actually, I'm using Dolphin) properly loads the server version of the file every time. Once again, I don't mean to bring this up on an Android forum if it really isn't an Android issue...but I'm not sure whether the problem is coming from the Android system for some reason (I'm not sure whether I should expect my code to work in any other Java environment, just not Android). Where else might the cache be coming from if the URLConnection's useCaches variable is definitely false (verified as I step over setUseCaches(false) in the debugger)? I'm sorry if this is off-topic, I appreciate any help. Here's how I load the file: String address = httpUrlOfFileOnMyWebserver; URL url = new URL(address); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); if (conn.getUseCaches()) conn.setUseCaches(false); InputStream is = (InputStream)conn.getContent(); Reader reader = new InputStreamReader(is, UTF-8); StringWriter writer = new StringWriter(); char[] buffer = new char[1024]; for (int length = 0; (length = reader.read(buffer)) 0;) writer.write(buffer, 0, length); is.close(); reader.close(); writer.close(); String fileStr = writer.toString(); -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
I haven't considered testing different kinds of connections...I figured the phone was responsible for the caching and the issue was unrelated to the connection...but I could test it. For that matter, it could be the fault of the particular phone (perhaps this phone caches http data without permission). At the current time, most of my tests have been performed over cell, not wifi (TMobile, Seattle area if that matters). On Friday, November 2, 2012 8:01:15 AM UTC-7, Robert Greenwalt wrote: Even if this is a carrier issue, please let us know - we'd like the carriers to do the right thing and do have some contacts to explore issues like this. Kieth, was this on mobile data or on wifi (or other)? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: (Http)URLConnection.setUseCaches(false) isn't working
There could be an overzealous cache somewhere in the middle - either intentionally, or misconfigured, or an old buggy version. For example: http://squid-web-proxy-cache.1019090.n4.nabble.com/Problem-with-cached-entries-w-ETag-and-request-without-If-None-Match-header-td1048627.html I also vaguely recall a mention of overzealous caching in the nginx wiki (probably under Expires or ETag)... -- K 2012/11/2 Keith Wiley kbwi...@gmail.com I haven't considered testing different kinds of connections...I figured the phone was responsible for the caching and the issue was unrelated to the connection...but I could test it. For that matter, it could be the fault of the particular phone (perhaps this phone caches http data without permission). At the current time, most of my tests have been performed over cell, not wifi (TMobile, Seattle area if that matters). On Friday, November 2, 2012 8:01:15 AM UTC-7, Robert Greenwalt wrote: Even if this is a carrier issue, please let us know - we'd like the carriers to do the right thing and do have some contacts to explore issues like this. Kieth, was this on mobile data or on wifi (or other)? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
