我正在使用couchdb4j api通过sessiondb与versiondb（版本0.11.2）建立连接。 Couchdb数据库受用户名和密码保护， 试图建立联系 Session（String host，int port，String user，String pass，boolean usesAuth，boolean secure）构造函数，提供host，port，user，pass和usersAuth true，secure false， 但它无法与用户名和密码建立连接并发出警告身份验证错误：无法应对任何这些挑战：{}。 我使用了正确的用户名和密码。
答案 0 :(得分：1)
尝试使用积极维护的CouchDB lib http://www.ektorp.org/。
答案 1 :(得分：1)
我通过编写一个简单的Curl类来解决同样的问题，该类简化了通信并以String形式返回JSON，因为这是返回的内容。
它应该是自我解释的，您可以阅读提示的主要方法。
package path.to.the.class;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.codec.binary.Base64;
import Log;
/**
* This class takes on the simple task of doing http calls to any http web service like a web page or alike. Since the
* class is streamlined for JSON use this is the most easiest to set up.
*
* @author mikael.p.larsson@epsilon.nu
*
*/
public class Curl {
private Map<String, String> requestProperties = null;
private String charsetName = "UTF8";
public static final String GET = "GET";
public static final String PUT = "PUT";
public static final String POST = "POST";
public static final String HEAD = "HEAD";
public static final String DELETE = "DELETE";
/**
* This is the default constructor for Curl which takes it for granted that you want to communicate and read JSON.
* Most of the times this approach works even if plain html or text is requested.
*/
public Curl() {
requestProperties = new HashMap<String, String>();
requestProperties.put("Content-Type", "application/json");
}
/**
* With this alternate constructor a map containing header strings can be provided, useful if something apart from
* JSON is to be consumed.
*
* @param requestProperties
* a Map containing the header strings.
*/
public Curl(Map<String, String> requestProperties) {
this.requestProperties = requestProperties;
}
/**
* Public setter to enable setting charsetName.
*
* @param charsetName
* @return this instance to enable on liners.
*/
public Curl setCharsetName(String charsetName) {
this.charsetName = charsetName;
return this;
}
/**
* In the world of the web this is the command that a web browser does for you after you have entered an url into
* the address field. When using GET there should be no side effects on the site the data was requested from; the
* get method only consumes data and sends nothing.
*
* @param urlAsString
* the url to fetch from the internet.
* @return The response from the server
*/
public String get(String urlAsString) {
return doHttpCall(urlAsString, GET, null);
}
/**
* Put should be used when a resource should be sent to a server.
*
* @param urlAsString
* the url to the resource.
* @param doc
* the content to put
* @return The response from the server.
*/
public String put(String urlAsString, String doc) {
return doHttpCall(urlAsString, "PUT", doc);
}
/**
* Post should be used when a resource should be posted to a server.
*
* @param urlAsString
* the url to the resource.
* @param doc
* the content to put
* @return The response from the server.
*/
public String post(String urlAsString, String doc) {
return doHttpCall(urlAsString, "POST", doc);
}
/**
* Mostly to be considered as a get without the contents, Here implemented as an is the resource available function.
*
* @param urlAsString
* the url to the resource.
* @return The responseMessage from the server.
*/
public String head(String urlAsString) {
return doHttpCall(urlAsString, "HEAD", null);
}
/**
* Deletes a resource from an url. Be careful!
*
* @param urlAsString
* The url to the resource to delete.
* @return The response from the server.
*/
public String delete(String urlAsString) {
try {
return doHttpCall(urlAsString, "DELETE", null);
} catch (Exception e) {
Log.warn("No object to delete found at " + urlAsString + ".");
return "No object to delete found at " + urlAsString + ".";
}
}
/**
* This method does the actual HTTP communication to simplify the methods above.
*
* @param urlAsString
* The url to resource in question.
* @param method
* The method to be used.
* @param doc
* The resource to send or null if none.
* @return The response from the server.
*/
private String doHttpCall(String urlAsString, String method, String doc) {
StringBuffer result = new StringBuffer();
HttpURLConnection httpUrlConnection = null;
try {
URL url = new URL(urlAsString);
httpUrlConnection = (HttpURLConnection) url.openConnection();
httpUrlConnection.setDoInput(true);
httpUrlConnection.setRequestMethod(method);
if (url.getUserInfo() != null) {
String basicAuth = "Basic " + new String(new Base64().encode(url.getUserInfo().getBytes()));
httpUrlConnection.setRequestProperty("Authorization", basicAuth);
}
httpUrlConnection.setRequestProperty("Content-Length", "0");
for (String key : requestProperties.keySet()) {
httpUrlConnection.setRequestProperty(key, requestProperties.get(key));
}
if (doc != null && !doc.isEmpty()) {
httpUrlConnection.setDoOutput(true);
httpUrlConnection.setRequestProperty("Content-Length", "" + doc.getBytes(charsetName));
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(httpUrlConnection.getOutputStream(),
charsetName);
outputStreamWriter.write(doc);
outputStreamWriter.close();
}
readInputStream(result, httpUrlConnection.getInputStream());
} catch (RuntimeException e) {
Log.info(e.getMessage());
} catch (MalformedURLException e) {
Log.warn("The url '" + urlAsString + "' is malformed.");
} catch (IOException e) {
try {
result.append(e.getMessage());
readInputStream(result, httpUrlConnection.getErrorStream());
if ("".equals(result.toString())) {
result.append("Error ");
result.append(httpUrlConnection.getResponseCode());
result.append(" : ");
result.append(httpUrlConnection.getResponseMessage());
result.append(". Exception message is: [");
result.append(e.getMessage());
result.append("]");
}
} catch (IOException e1) {
}
} finally {
if ("HEAD".equalsIgnoreCase(method)) {
try {
result.append(httpUrlConnection.getResponseMessage());
} catch (IOException e) {
Log.fatal("This is as low as we can get, nothing worked!");
e.printStackTrace();
}
}
if (httpUrlConnection != null)
httpUrlConnection.disconnect();
}
return result.toString();
}
/**
* Local helper method that reads data from an inputstream.
*
* @param result
* The read text.
* @param inputStream
* The stream to read.
* @throws UnsupportedEncodingException
* @throws IOException
*/
private void readInputStream(StringBuffer result, InputStream inputStream) throws UnsupportedEncodingException,
IOException {
if (inputStream == null)
throw new IOException("No working inputStream.");
InputStreamReader streamReader = new InputStreamReader(inputStream, charsetName);
BufferedReader bufferedReader = new BufferedReader(streamReader);
String row;
while ((row = bufferedReader.readLine()) != null) {
result.append(row);
result.append("\n");
}
bufferedReader.close();
streamReader.close();
}
/**
* A main method to provide the possibility to use this exact class from the command line.
* <p>
* usage:
* <code>java -cp target/classes/. path.to.the.class.Curl http://server.domain.nu:port/path/to/resource method [data]</code>
* </p>
*
* @param args
* in order: url method data
*/
public static void main(String[] args) {
if (args.length < 2) {
System.out.println("usage: Curl path method [data]");
System.exit(0);
}
String url = args[0];
String method = args[1];
String data = args.length == 3 ? args[2] : null;
Curl curl = new Curl();
if (method.equals("head")) {
System.out.println(curl.head(url));
System.exit(0);
}
if (method.equals("put")) {
System.out.println(curl.put(url, data));
System.exit(0);
}
System.out.println(curl.doHttpCall(url, method, data));
}
}
答案 2 :(得分：0)
尝试将配置参数required_valid_user更改为true