Android-发送HTTPS Get请求

我想向google shopping api发送HTTPS Get请求，但是没有什么对我有效，例如，下面是我目前正在尝试的：

try {        
    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet();
    request.setURI(new URI("https://www.googleapis.com/shopping/search/v1/public/products/?key={my_key}&country=&q=t-shirts&alt=json&rankByrelevancy="));
    HttpResponse response = client.execute(request);
} catch (URISyntaxException e) {
    e.printStackTrace();
} catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}   
return response;

---

如果有人对如何改进或替换它有任何建议，请提前告诉我，谢谢。

您是否将此添加到您的清单中

<uses-permission android:name="android.permission.INTERNET" />

---

如果您不告诉我们错误是什么，很难说清楚

---

但是，如果您在UI线程上运行此操作，并且web服务器需要几秒钟以上的时间来响应，则系统将发出应用程序无响应警告。确保在单独的线程上执行任何网络传输。

您应该会遇到编译错误

这是正确的版本：

HttpResponse response = null;
try {        
    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet();
    request.setURI(new URI("https://www.googleapis.com/shopping/search/v1/public/products/?key={my_key}&country=&q=t-shirts&alt=json&rankByrelevancy="));
    response = client.execute(request);
} catch (URISyntaxException e) {
    e.printStackTrace();
} catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}   
return response;

因此，现在如果您有错误，您的响应将返回为null

一旦您得到响应并检查它是否为null，您就需要获取内容（即您的JSON）

这将为您提供一个要使用的InputStream。如果要将其转换为字符串，请执行以下操作或等效操作：

拥有此字符串后，需要从中创建JSONObject：

---

完成了

您可以使用URLConnection类以这种方式进行尝试

String error = ""; // string field
private String getDataFromUrl(String demoIdUrl) {

    String result = null;
    int resCode;
    InputStream in;
    try {
        URL url = new URL(demoIdUrl);
        URLConnection urlConn = url.openConnection();

        HttpsURLConnection httpsConn = (HttpsURLConnection) urlConn;
        httpsConn.setAllowUserInteraction(false);
        httpsConn.setInstanceFollowRedirects(true);
        httpsConn.setRequestMethod("GET");
        httpsConn.connect();
        resCode = httpsConn.getResponseCode();

        if (resCode == HttpURLConnection.HTTP_OK) {
            in = httpsConn.getInputStream();

            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    in, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line).append("\n");
            }
            in.close();
            result = sb.toString();
        } else {
            error += resCode;
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return result;
}

我在这里写了两个方法。复制这两个方法。在第一个方法中，uri=要发送请求的url：

第一种方法：

和另一种方法，该方法完成对第一种方法的所有信任证书

第二种方法：

多亏了

添加一个Java类CustomSSLSocketFactory.Java

 import java.io.IOException;
 import java.net.Socket;
 import java.net.UnknownHostException;
 import java.security.KeyManagementException;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
 import java.security.UnrecoverableKeyException;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManager;
 import javax.net.ssl.X509TrustManager;
 import org.apache.http.conn.ssl.SSLSocketFactory;

 public class CustomSSLSocketFactory extends SSLSocketFactory{
SSLContext sslContext = SSLContext.getInstance("TLS");
/**
 * Generate Certificate for ssl connection
 * @param truststore
 * @throws NoSuchAlgorithmException
 * @throws KeyManagementException
 * @throws KeyStoreException
 * @throws UnrecoverableKeyException
 */
public CustomSSLSocketFactory(KeyStore truststore)
        throws NoSuchAlgorithmException, KeyManagementException,
        KeyStoreException, UnrecoverableKeyException {
    super(truststore);
    TrustManager tm = new X509TrustManager(){
        @Override
        public void checkClientTrusted(X509Certificate[] arg0, String arg1)
                throws CertificateException {
        }
        @Override
        public void checkServerTrusted(X509Certificate[] chain,
                                       String authType) throws CertificateException {
        }
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    };
    sslContext.init(null, new TrustManager[] {tm}, null);
}

@Override
public Socket createSocket(Socket socket, String host, int port,
                           boolean autoClose) throws IOException, UnknownHostException {
    return sslContext.getSocketFactory().createSocket(socket, host, port,
            autoClose);
}

@Override
public Socket createSocket() throws IOException {
    return sslContext.getSocketFactory().createSocket();
}
 }

在代码中

    String cloud_url="https://www.google.com";
    HttpClient client = new DefaultHttpClient();
        if(cloud_url.toLowerCase().contains("https://")){
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
            trustStore.load(null, null);
            SSLSocketFactory sf = new CustomSSLSocketFactory(trustStore);
            sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            HttpParams params = new BasicHttpParams();
            SchemeRegistry registry = new SchemeRegistry();
            registry.register(new Scheme("https", sf, 443));

            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);
            client= new DefaultHttpClient(ccm, params);
        }


        HttpGet request= new HttpGet( );
        request.setURI(new URI( cloud_url));
        HttpResponse response = client.execute(request);

---

在HttpPost中也可以工作。

这不是您的完整代码，因为在上面的场景中，

响应

变量不在return语句的范围内。i、 e.您在try块中声明它，这样就不起作用了。出什么问题了？我已经编辑了我的文章，加入了try括号，但仅此而已。我是否应该删除try和catch括号，只使用“throws exception…”这样我就可以访问响应变量？什么不起作用？有例外吗，Logcat？当问题来自httpClient时，我建议首先检查响应状态代码，即httpResponse.getStatusLine（）.getStatusCode（）；我试着像你建议的那样检查响应状态，但它有下划线，并给出了一个错误，我使用日志找出返回的响应是什么，它是“org.apache.http.message”。BasicHttpResponse@46241178“不过这并不重要，因为这次它没有强行关闭。你知道我如何使用响应值吗，它应该返回一个JSON格式的数组，我可以解析，但它看起来不像。希望您已经解决了您的问题java.lang.ClassCastException:com.android.okhttp.internal.http.HttpURLConnectionImpl不能转换为javax.net.ssl.httpsurlconnection，如果我使用

HttpURLConnection

，而不是

HttpsURLConnection

在此代码中，有什么区别？由于

HttpsURLConnection

继承自

HttpURLConnection

，相同实例中的相同方法将在

.connect

和

上调用。我错了吗？是的！[链接]（）不适合我？发生SSLPeerUnspecifiedException异常：(
String error = ""; // string field
private String getDataFromUrl(String demoIdUrl) {

    String result = null;
    int resCode;
    InputStream in;
    try {
        URL url = new URL(demoIdUrl);
        URLConnection urlConn = url.openConnection();

        HttpsURLConnection httpsConn = (HttpsURLConnection) urlConn;
        httpsConn.setAllowUserInteraction(false);
        httpsConn.setInstanceFollowRedirects(true);
        httpsConn.setRequestMethod("GET");
        httpsConn.connect();
        resCode = httpsConn.getResponseCode();

        if (resCode == HttpURLConnection.HTTP_OK) {
            in = httpsConn.getInputStream();

            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    in, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line).append("\n");
            }
            in.close();
            result = sb.toString();
        } else {
            error += resCode;
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return result;
}

public  static String Getdata (String uri ){

        BufferedReader reader = null;

        try {

            URL url = new URL(uri);
            HttpURLConnection con = null;

            URL testUrlHttps = new URL(uri);
            if (testUrlHttps.getProtocol().toLowerCase().equals("https"))
            {
                trustAllHosts();
                HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
                https.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
                con = https;
            } else
            {
                con = (HttpURLConnection) url.openConnection();
            }


            con.setReadTimeout(15000);
            con.setConnectTimeout(15000);
            StringBuilder sb = new StringBuilder();
            reader = new BufferedReader(new InputStreamReader(con.getInputStream()));

            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }

            return sb.toString();

        } catch (Exception e) {
            e.printStackTrace();
            return "";
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    return "";
                }
            }
        }
    }

private static void trustAllHosts()
    {
        // Create a trust manager that does not validate certificate chains
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager()
        {
            public java.security.cert.X509Certificate[] getAcceptedIssuers()
            {
                return new java.security.cert.X509Certificate[] {};
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException
            {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException
            {
            }
        } };

        // Install the all-trusting trust manager
        try
        {
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

 import java.io.IOException;
 import java.net.Socket;
 import java.net.UnknownHostException;
 import java.security.KeyManagementException;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
 import java.security.UnrecoverableKeyException;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManager;
 import javax.net.ssl.X509TrustManager;
 import org.apache.http.conn.ssl.SSLSocketFactory;

 public class CustomSSLSocketFactory extends SSLSocketFactory{
SSLContext sslContext = SSLContext.getInstance("TLS");
/**
 * Generate Certificate for ssl connection
 * @param truststore
 * @throws NoSuchAlgorithmException
 * @throws KeyManagementException
 * @throws KeyStoreException
 * @throws UnrecoverableKeyException
 */
public CustomSSLSocketFactory(KeyStore truststore)
        throws NoSuchAlgorithmException, KeyManagementException,
        KeyStoreException, UnrecoverableKeyException {
    super(truststore);
    TrustManager tm = new X509TrustManager(){
        @Override
        public void checkClientTrusted(X509Certificate[] arg0, String arg1)
                throws CertificateException {
        }
        @Override
        public void checkServerTrusted(X509Certificate[] chain,
                                       String authType) throws CertificateException {
        }
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    };
    sslContext.init(null, new TrustManager[] {tm}, null);
}

@Override
public Socket createSocket(Socket socket, String host, int port,
                           boolean autoClose) throws IOException, UnknownHostException {
    return sslContext.getSocketFactory().createSocket(socket, host, port,
            autoClose);
}

@Override
public Socket createSocket() throws IOException {
    return sslContext.getSocketFactory().createSocket();
}
 }

    String cloud_url="https://www.google.com";
    HttpClient client = new DefaultHttpClient();
        if(cloud_url.toLowerCase().contains("https://")){
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
            trustStore.load(null, null);
            SSLSocketFactory sf = new CustomSSLSocketFactory(trustStore);
            sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            HttpParams params = new BasicHttpParams();
            SchemeRegistry registry = new SchemeRegistry();
            registry.register(new Scheme("https", sf, 443));

            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);
            client= new DefaultHttpClient(ccm, params);
        }


        HttpGet request= new HttpGet( );
        request.setURI(new URI( cloud_url));
        HttpResponse response = client.execute(request);