我是cloudant的新手。我编写了连接cloudant DB的代码，这是DBaas 在bluemix中。 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:xxxxxxxxxxxxxxxx@4728f43d-fcd2-41f0-be63-8945a78a9dab-bluemix.cloudant.com";
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:xxxxxxxxxxxxxxxx@8452e722-8945-47d9-b372-ede45e55a7a7-bluemix.cloudant.com";
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范围应用程序Liberty配置文件上本地部署了应用程序。 在访问数据库连接时，我遇到了异常。请告诉我连接cloudant DB需要做什么。 我正在使用cloudant-client-2.2.0.jar来访问cloudant DB
[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.<init>(CouchDatabaseBase.java:61)
[err] at com.cloudant.client.org.lightcouch.CouchDatabase.<init>(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.<init>(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
答案 0 :(得分：2)
您使用的代理设置适用于HTTP。使用CloudantClient方法创建account时，默认情况下将使用HTTPS over HTTP。使用HTTPS代理可以解决您的问题。
答案 1 :(得分：0)
在上面的代码中，您似乎使用了http的系统属性。如JVM proxies documentation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();
我认为此选项也适用于代理仅具有http端点的情况，例如proxyURL(new URL("http://9.184.9.13"))，但很明显，在这种情况下，您的通信对于客户端和代理之间的支路而言是未加密的。
答案 2 :(得分：0)
代理配置仅在我明确设置时才适用于我：
Authenticator authenticator = new Authenticator() {
public PasswordAuthentication getPasswordAuthentication() {
return (new PasswordAuthentication(cloudantProxyUsername,
cloudantProxyPassword.toCharArray()));
}
};
Authenticator.setDefault(authenticator);