8

我正在尝试通过以下方式从我的 Android/Java 源代码访问Basecamp API ....

import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;

public class BCActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        DefaultHttpClient httpClient = new DefaultHttpClient();

        //final String url = "https://encrypted.google.com/webhp?hl=en"; //This url works
        final String url = "https://username:password@projectsource.basecamphq.com/people.xml"; //This don't
        HttpGet http = new HttpGet(url);
        http.addHeader("Accept", "application/xml");
        http.addHeader("Content-Type", "application/xml"); 

        try {

            //  HttpResponse response = httpClient.execute(httpPost);
            HttpResponse response = httpClient.execute(http);

            StatusLine statusLine = response.getStatusLine();
            System.out.println("statusLine : "+ statusLine.toString()); 

            ResponseHandler <String> res = new BasicResponseHandler();  

            String strResponse = httpClient.execute(http, res);
            System.out.println("________**_________________________\n"+strResponse);
            System.out.println("\n________**_________________________\n");

        } catch (Exception e) {
            e.printStackTrace(); 
        }

        WebView myWebView = (WebView) this.findViewById(R.id.webView);
        myWebView.loadUrl(url);//Here it works and displays XML response

    }
}

此 URL 在 中显示响应WebView，但当我尝试通过HttpClient如上所示访问时显示未经授权的异常。

这是通过 Android/Java访问Basecamp API的正确方法吗？或请为我提供正确的方法。

4

4 回答 4

11

HttpClient无法从 URI 中获取登录信用。
你必须给他们指定的方法。

如果你使用HttpClient 4.x 看看这个：
http ://hc.apache.org/httpcomponents-client-ga/tutorial/html/authentication.html

但请注意，如果您不想在HttpClient上使用新版本（Android 使用版本 3.x），您应该看这里：
http ://hc.apache.org/httpclient-3.x/authentication.html

那是理论，现在我们使用它们：
基本上我们使用HTTP，但如果你想使用HTTPS，你必须将以下分配编辑new HttpHost("www.google.com", 80, "http")到new HttpHost("www.google.com", 443, "https").

此外，您必须编辑主机 ( www.google.com ) 以解决您的问题。
注意：只需要完整的限定域名 (FQDN)，不需要完整的 URI。

HttpClient 3.x：

package com.test;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.os.Bundle;

public class Test2aActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        try {
            HttpHost targetHost = new HttpHost("www.google.com", 80, "http");

            DefaultHttpClient httpclient = new DefaultHttpClient();
            try {
                // Store the user login
                httpclient.getCredentialsProvider().setCredentials(
                        new AuthScope(targetHost.getHostName(), targetHost.getPort()),
                        new UsernamePasswordCredentials("user", "password"));

                // Create request
                // You can also use the full URI http://www.google.com/
                HttpGet httpget = new HttpGet("/");
                // Execute request
                HttpResponse response = httpclient.execute(targetHost, httpget);

                HttpEntity entity = response.getEntity();
                System.out.println(EntityUtils.toString(entity));
            } finally {
                httpclient.getConnectionManager().shutdown();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

HttpClient 4.x：

注意：您将需要来自 Apache 的新HttpClient，另外您必须重新排列顺序，即 jar 文件位于 Android 库之前。

package com.test;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.os.Bundle;

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        try {
            HttpHost targetHost = new HttpHost("www.google.com", 80, "http");

            DefaultHttpClient httpclient = new DefaultHttpClient();
            try {
                // Store the user login
                httpclient.getCredentialsProvider().setCredentials(
                        new AuthScope(targetHost.getHostName(), targetHost.getPort()),
                        new UsernamePasswordCredentials("user", "password"));

                // Create AuthCache instance
                AuthCache authCache = new BasicAuthCache();
                // Generate BASIC scheme object and add it to the local
                // auth cache
                BasicScheme basicAuth = new BasicScheme();
                authCache.put(targetHost, basicAuth);

                // Add AuthCache to the execution context
                BasicHttpContext localcontext = new BasicHttpContext();
                localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);

                // Create request
                // You can also use the full URI http://www.google.com/
                HttpGet httpget = new HttpGet("/");
                // Execute request
                HttpResponse response = httpclient.execute(targetHost, httpget, localcontext);

                HttpEntity entity = response.getEntity();
                System.out.println(EntityUtils.toString(entity));
            } finally {
                httpclient.getConnectionManager().shutdown();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
于 2011-08-18T12:10:46.660 回答
4

最后我明白了如何粘合上面答案中显示的代码......

public static void performPost(String getUri, String xml) {

    String serverName = "*******";
    String username = "*******";
    String password = "********";
    String strResponse = null;

    try {
        HttpHost targetHost = new HttpHost(serverName, 443, "https");

        DefaultHttpClient httpclient = new DefaultHttpClient();
        try {
            // Store the user login
            httpclient.getCredentialsProvider().setCredentials(
                    new AuthScope(targetHost.getHostName(), targetHost.getPort()),
                    new UsernamePasswordCredentials(username, password));

            // Create AuthCache instance
            AuthCache authCache = new BasicAuthCache();
            // Generate BASIC scheme object and add it to the local
            // auth cache
            BasicScheme basicAuth = new BasicScheme();
            authCache.put(targetHost, basicAuth);

            // Add AuthCache to the execution context
            BasicHttpContext localcontext = new BasicHttpContext();
            localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);

            // Create request
            // You can also use the full URI http://www.google.com/
            HttpPost httppost = new HttpPost(getUri);
            StringEntity se = new StringEntity(xml,HTTP.UTF_8);
            se.setContentType("text/xml");
            httppost.setEntity(se); 
            // Execute request
            HttpResponse response = httpclient.execute(targetHost, httppost, localcontext);

            HttpEntity entity = response.getEntity();
            strResponse = EntityUtils.toString(entity);

            StatusLine statusLine = response.getStatusLine();
            Log.i(TAG +": Post","statusLine : "+ statusLine.toString()); 
            Log.i(TAG +": Post","________**_________________________\n"+strResponse);
            Log.i(TAG +": Post","\n________**_________________________\n");

        } finally {
            httpclient.getConnectionManager().shutdown();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

}

一件非常重要的事情你的图书馆应该如何安排以及你需要哪些图书馆......

在此处输入图像描述

从这里你会发现这个库。

在 Eclipse 中添加它们（低于 Android sdk < 16）...

Project properties -> java build path -> Libraries -> Add external JARs

在eclipse中按顺序排列它们......

Project properties -> java build path -> order and export

对于以上 Android sdk >= 16，您必须将这些库放入“libs”文件夹中。

于 2011-08-23T07:08:21.860 回答
4

附录 CSchulz 出色且非常有帮助的答案：

在 http 客户端 4.3 中：

localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);

不再工作（ClientContext.AUTH_CACHE 已弃用）

采用：

import org.apache.http.client.protocol.HttpClientContext;

和

localcontext.setAttribute(HttpClientContext.AUTH_CACHE, authCache);

见http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/client/protocol/ClientContext.html

和：

http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/client/protocol/HttpClientContext.html

于 2013-09-17T19:42:20.247 回答
1

如果您喜欢使用其他答案中提到的 HttpClient 4.x ，您也可以使用httpclientandroidlib。这是一个没有 apache.commons 和 Android LogCat 支持的转换股票 HttpClient。

于 2011-09-01T07:59:25.627 回答