从本地连接到Cloudant DB时出现连接错误

我是cloudant的新手。 我编写了连接cloudant DB的代码，它是bluemix中的DBaas。 我已在本地编写代码来连接cloudant DB。 以下是代码

try { user="4728f43d-fcd2-41f0-be63-8945a78a9dab-bluemix"; password="xxxxxxxxxxxxxxxx"; url="https://4728f43d-fcd2-41f0-be63-8945a78a9dab-bluemix:[e-mail]"; System.setProperty("http.proxyHost", "9.184.9.13"); System.setProperty("http.proxyPort", "80"); //user="8452e722-8945-47d9-b372-ede45e55a7a7-bluemix"; //password="xxxxxxxxxxxxxxxx"; //url="https://8452e722-8945-47d9-b372-ede45e55a7a7-bluemix:[e-mail]"; CloudantClient client = ClientBuilder.account(user) .username(user) .password(password) .build(); return client; } catch (CouchDbException e) { throw new RuntimeException("Unable to connect to repository", e); } 

我在Web sphere应用程序Liberty配置文件上本地部署了应用程序。 在访问数据库连接时，我遇到了exception。 请告诉我连接cloudant DB需要做些什么。 我正在使用cloudant-client-2.2.0.jar来访问云端数据库

 [ERROR ] Failed to read cookie response header Connection refused: connect [ERROR ] Failed to get response code from request Connection refused: connect [err] java.lang.RuntimeException: DB Not found [err] at com.ibm.util.CloudantClientMgr.getDB(CloudantClientMgr.java:106) [err] at com.ibm.dao.CloudantDaoImpl.getSiteList(CloudantDaoImpl.java:54) [err] at com.ibm.service.SocialKeyManagerImpl.getSiteList(SocialKeyManagerImpl.java:60) [err] at com.ibm.actions.BaseAction.execute(BaseAction.java:56) [err] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) [err] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) [err] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) [err] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) [err] at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) [err] at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [err] at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1287) [err] at [internal classes] [err] at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125) [err] at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:207) [err] at [internal classes] [err] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [err] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [err] at java.lang.Thread.run(Thread.java:745) [err] Caused by: com.cloudant.client.org.lightcouch.CouchDbException: Error retrieving server response [err] at com.cloudant.client.org.lightcouch.CouchDbClient.execute(CouchDbClient.java:535) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.executeToInputStream(CouchDbClient.java:550) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.put(CouchDbClient.java:361) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.put(CouchDbClient.java:351) [err] at com.cloudant.client.org.lightcouch.CouchDatabaseBase.create(CouchDatabaseBase.java:437) [err] at com.cloudant.client.org.lightcouch.CouchDatabaseBase.(CouchDatabaseBase.java:61) [err] at com.cloudant.client.org.lightcouch.CouchDatabase.(CouchDatabase.java:26) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.database(CouchDbClient.java:165) [err] at com.cloudant.client.api.CloudantClient.database(CloudantClient.java:216) [err] at com.ibm.util.CloudantClientMgr.getDB(CloudantClientMgr.java:103) [err] ... 37 more [err] Caused by: java.net.ConnectException: Connection refused: connect [err] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [err] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [err] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [err] at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [err] at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1676) [err] at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1674) [err] at java.security.AccessController.doPrivileged(Native Method) [err] at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1672) [err] at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1245) [err] at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468) [err] at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.execute(CouchDbClient.java:483) [err] ... 46 more [err] Caused by: java.net.ConnectException: Connection refused: connect [err] at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) [err] at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) [err] at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) [err] at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) [err] at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) [err] at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) [err] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) [err] at java.net.Socket.connect(Socket.java:579) [err] at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:625) [err] at sun.net.NetworkClient.doConnect(NetworkClient.java:175) [err] at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) [err] at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) [err] at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:275) [err] at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:371) [err] at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191) [err] at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:933) [err] at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177) [err] at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1301) [err] at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468) [err] at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338) [err] at com.cloudant.http.interceptors.CookieInterceptor.interceptResponse(CookieInterceptor.java:102) [err] at com.cloudant.http.HttpConnection.execute(HttpConnection.java:244) [err] at com.cloudant.client.org.lightcouch.CouchDbClient.execute(CouchDbClient.java:475) [err] ... 46 more 

Answer 1

您使用的代理设置适用于HTTP。 使用account方法创建CloudantClient ，默认情况下将使用HTTPS over HTTP。 使用HTTPS代理可以解决您的问题。

Answer 2

在上面的代码中，您似乎使用了http的系统属性。 如JVM代理文档中所述，http vs https的JVM范围代理设置需要不同的系统属性。 对于http s，它们是：

 https.proxyHost https.proxyPort 

值得注意的是，您还可以设置专门用于CloudantClient的代理，而不是使用JVM宽代理的系统属性。 例如：

 CloudantClient client = ClientBuilder.account(user) .username(user) .password(password) .proxyURL(new URL("https://9.184.9.13")) .build(); 

我认为这个选项也适用于代理只有一个http端点，例如proxyURL(new URL("http://9.184.9.13")) ，但很明显，在这种情况下你的通信将是未加密的客户端和代理。

Answer 3

只有在明确设置时，代理配置才适用于我：

 Authenticator authenticator = new Authenticator() { public PasswordAuthentication getPasswordAuthentication() { return (new PasswordAuthentication(cloudantProxyUsername, cloudantProxyPassword.toCharArray())); } }; Authenticator.setDefault(authenticator);