[google-appengine] Fetch URL problem
Hi, I've a problem with fetch URL using appengine.. this is my code:
try {
URL url = new URL("http://www.example.com/atom.xml";);
BufferedReader reader = new BufferedReader(new
InputStreamReader(url.openStream()));
String line;
while ((line = reader.readLine()) != null) {
// ...
}
reader.close();
} catch (MalformedURLException e) {
// ...
} catch (Exception e) {
// ...
}
the error is:
java.lang.NullPointerException
at java.util.Collections.addAll(Unknown Source)
at sun.security.ssl.AbstractTrustManagerWrapper.(Unknown Source)
at sun.security.ssl.SSLContextImpl.chooseTrustManager(Unknown Source)
at sun.security.ssl.SSLContextImpl.engineInit(Unknown Source)
at javax.net.ssl.SSLContext.init(Unknown Source)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createNonvalidatingScheme(LocalURLFetchService.java:241)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createHttpClient(LocalURLFetchService.java:263)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.getNonValidatingClient(LocalURLFetchService.java:508)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.access$100(LocalURLFetchService.java:82)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:422)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.doPrivilegedExecute(LocalURLFetchService.java:409)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.fetch(LocalURLFetchService.java:377)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:527)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:481)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:458)
at java.util.concurrent.Executors$PrivilegedCallable$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.concurrent.Executors$PrivilegedCallable.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
the same in a simple java app work fine..
I had test in local
can you help me?
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[google-appengine] Fetch URL problem nullpointerexception
Hi, I've a problem with fetch URL using appengine..
the problem is on url.openStream() (nullpointerexception) but url is not
null
this is my code:
try {
URL url = new URL(site);
BufferedReader reader = new BufferedReader(new
InputStreamReader(url.openStream()));
String line;
while ((line = reader.readLine()) != null) {
}
reader.close();
} catch (MalformedURLException e) {
} catch (Exception e) {
}
the error is:
java.lang.NullPointerException
at java.util.Collections.addAll(Unknown Source)
at sun.security.ssl.AbstractTrustManagerWrapper.(Unknown Source)
at sun.security.ssl.SSLContextImpl.chooseTrustManager(Unknown Source)
at sun.security.ssl.SSLContextImpl.engineInit(Unknown Source)
at javax.net.ssl.SSLContext.init(Unknown Source)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createNonvalidatingScheme(LocalURLFetchService.java:241)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createHttpClient(LocalURLFetchService.java:263)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.getNonValidatingClient(LocalURLFetchService.java:508)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.access$100(LocalURLFetchService.java:82)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:422)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.doPrivilegedExecute(LocalURLFetchService.java:409)
at
com.google.appengine.api.urlfetch.dev.LocalURLFetchService.fetch(LocalURLFetchService.java:377)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:527)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:481)
at
com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:458)
at java.util.concurrent.Executors$PrivilegedCallable$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.concurrent.Executors$PrivilegedCallable.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
the same in a simple java app work fine..
I had test in local
can you help me?
--
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[google-appengine] Re: Fetch URL problem nullpointerexception
WOW thank you very much ;)
It's work, this is a very strange bug..
Mario
Il giorno venerdì 12 ottobre 2012 18:29:01 UTC+2, Vinny P ha scritto:
>
> Are you using Java 7? If so, you need to downgrade to Java 6. This is a
> known bug (you can see a similar stacktrace from Oracle:
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7145592 the only
> workaround listed is to use Java 6).
>
> If I recall correctly, App Engine only supports Java 5 & 6, not 7.
>
> If you're not using Java 7, you'll have to post more of your code. Or
> deploy your app to App Engine production and see if the problem fixes
> itself; you may have an issue with your local dev environment.
>
> -Vinny P
>
> On Friday, October 12, 2012 10:37:10 AM UTC-5, Mario Buonomo wrote:
>>
>> Hi, I've a problem with fetch URL using appengine..
>>
>> the problem is on url.openStream() (nullpointerexception) but url is not
>> null
>>
>> this is my code:
>>
>> try {
>> URL url = new URL(site);
>> BufferedReader reader = new BufferedReader(new
>> InputStreamReader(url.openStream()));
>> String line;
>> while ((line = reader.readLine()) != null) {
>> }
>> reader.close();
>> } catch (MalformedURLException e) {
>> } catch (Exception e) {
>> }
>>
>> the error is:
>> java.lang.NullPointerException
>> at java.util.Collections.addAll(Unknown Source)
>> at sun.security.ssl.AbstractTrustManagerWrapper.(Unknown Source)
>> at sun.security.ssl.SSLContextImpl.chooseTrustManager(Unknown Source)
>> at sun.security.ssl.SSLContextImpl.engineInit(Unknown Source)
>> at javax.net.ssl.SSLContext.init(Unknown Source)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createNonvalidatingScheme(LocalURLFetchService.java:241)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.createHttpClient(LocalURLFetchService.java:263)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.getNonValidatingClient(LocalURLFetchService.java:508)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.access$100(LocalURLFetchService.java:82)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:422)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService$7.run(LocalURLFetchService.java:409)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.doPrivilegedExecute(LocalURLFetchService.java:409)
>> at
>> com.google.appengine.api.urlfetch.dev.LocalURLFetchService.fetch(LocalURLFetchService.java:377)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>> at java.lang.reflect.Method.invoke(Unknown Source)
>> at
>> com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:527)
>> at
>> com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:481)
>> at
>> com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:458)
>> at java.util.concurrent.Executors$PrivilegedCallable$1.run(Unknown Source)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at java.util.concurrent.Executors$PrivilegedCallable.call(Unknown Source)
>> at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
>> at java.util.concurrent.FutureTask.run(Unknown Source)
>> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>> at java.lang.Thread.run(Unknown Source)
>>
>> the same in a simple java app work fine..
>>
>> I had test in local
>> can you help me?
>>
>
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