Cannot load URL: Connection refused (using Java API)

Tim

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Mar 2, 2010, 6:48:34 PM3/2/10

to reCAPTCHA

I've been using ReCaptcha in a production environment since October
2009, via the Java API (net.tanesha.recaptcha), and it has worked
quite well. Users of my web site use recaptcha hundreds/thousands of
times per day. To monitor recaptcha, every few minutes my app sends a
request to recaptcha (https://api-secure.recaptcha.net/). To do this
"ping", I call net.tanesha.recaptcha.ReCaptchaImpl.checkAnswer(), and
pass in bogus data. If I get a response, I know the service is
available. 99.9% of the time this works just fine. But a few times a
week I get this exception:

java.lang.Exception: Unable to access captcha server
... 5 lines omitted ...
Caused by: net.tanesha.recaptcha.ReCaptchaException: Cannot load URL:
Connection refused
at
net.tanesha.recaptcha.http.SimpleHttpLoader.httpPost(SimpleHttpLoader.java:
89)
at net.tanesha.recaptcha.ReCaptchaImpl.checkAnswer(ReCaptchaImpl.java:
61)

Our firewall allows outbound connections to all IP ranges listed on
the wiki page (http://wiki.recaptcha.net/index.php/
Firewalls_and_reCAPTCHA)

This exception typically occurs a few (1-6) times in a row, then
starts working again correctly. This connection is coming from within
a hosted data center, over a redundant Internet connection. Our
network engineer says the problem is not within our systems, and he's
rarely wrong. I searched this group and couldn't find any users with
the same problem. Any idea why this happens?

reCAPTCHA Support

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Mar 2, 2010, 7:07:02 PM3/2/10

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Often this type of issue is caused by a network operator in between the reCAPTCHA servers and your servers. If this type of problem persists, you should give your upstream ISP traceroute data from when the exceptions occur.

-b

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Java Geek

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Mar 2, 2010, 7:20:55 PM3/2/10

to reCAPTCHA

ack, typo. I meant http://api-verify.recaptcha.net/verify not
https://api-secure.recaptcha.net/.

Md.Mahabubur Rahman

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Mar 2, 2010, 11:15:25 PM3/2/10

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------------------------------------------------------------------------
Dear sir,
I am interest this work.

hari chouhan

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Dec 27, 2012, 7:35:23 AM12/27/12

to reca...@googlegroups.com

Hi,

can you help me to resolve this problem i am getting follwin exception pls help me to resolve this problem.. exception coming from "ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challengeField, responseField); " this lins pls find exception detail below

net.tanesha.recaptcha.ReCaptchaException: Cannot load URL: Connection reset

at net.tanesha.recaptcha.http.SimpleHttpLoader.httpPost(SimpleHttpLoader.java:89)

at net.tanesha.recaptcha.ReCaptchaImpl.checkAnswer(ReCaptchaImpl.java:61)

at sg.gov.frontier.common.web.ui.controller.efm.EFMController.createEFMCase(EFMController.java:146)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:471)

at sg.gov.frontier.core.techinfra.web.BaseWebController.handleRequestInternal(BaseWebController.java:133)

at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)

at sun.reflect.GeneratedMethodAccessor205.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:196)

at $Proxy24.handleRequest(Unknown Source)

at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at sg.gov.frontier.validator.web.ValidationWebContextFilter.doFilter(ValidationWebContextFilter.java:29)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)

at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)