0

我正在使用 ServiceNow Table API - JAVA 来获取数据（GET 请求）。我正在按照以下服务现在 wiki 链接中提供的示例进行操作：

网址：http ://wiki.servicenow.com/index.php?title=Table_API_Java_Examples#gsc.tab=0

我收到“java.net.SocketException：连接重置”

Exception in thread "main" java.net.SocketException: Connection reset  
  at java.net.SocketInputStream.read(Unknown Source)  
  at java.net.SocketInputStream.read(Unknown Source)  
  at sun.security.ssl.InputRecord.readFully(Unknown Source)  
  at sun.security.ssl.InputRecord.read(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.waitForClose(Unknown Source)  
  at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)  
  at sun.security.ssl.Handshaker.kickstart(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.kickstartHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)  
  at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:396)  
  at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:355)  
  at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)  
  at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)  
  at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)  
  at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)  
  at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)  
  at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)  
  at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)  
  at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)  
  at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)  
  at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)  
  at com.ucas.reports.volumetric.Demo.go(Demo.java:64)  
  at com.ucas.reports.volumetric.Demo.main(Demo.java:31)

我正在使用 maven 来处理依赖项并使用 apache httpclient (4.5.3)。以下是我的代码供参考：

package com.reports.volumetric;  
import java.io.IOException;  
import org.apache.http.HttpHost;  
import org.apache.http.auth.AuthScope;  
import org.apache.http.auth.UsernamePasswordCredentials;  
import org.apache.http.client.CredentialsProvider;  
import org.apache.http.client.methods.CloseableHttpResponse;  
import org.apache.http.client.methods.HttpGet;  
import org.apache.http.impl.client.BasicCredentialsProvider;  
import org.apache.http.impl.client.CloseableHttpClient;  
import org.apache.http.impl.client.HttpClients;  
import org.apache.http.util.EntityUtils;  


import com.reports.util.AppConstants;  

public class Demo {  

  public static void main(String args[]) throws IOException {  
  go();  
  }  


  private static void go() throws IOException {  
      CredentialsProvider credsProvider = new BasicCredentialsProvider();  
      credsProvider.setCredentials(  
      new AuthScope(new HttpHost(new HttpHost(AppConstants.SNOW_HOST))),  
      new UsernamePasswordCredentials("WebServiceUser", "WebServiceUserPassword"));  
      CloseableHttpClient httpclient = null;  
      try {  
          httpclient = HttpClients.custom()  
                      .setDefaultCredentialsProvider(credsProvider)  
                      .build();  
          HttpGet httpget = new HttpGet("https://instance.service-
                            now.com/api/now/table/incident");  
          httpget.setHeader("Accept", "application/json");  
          System.out.println("Executing request " + httpget.getRequestLine());  
          CloseableHttpResponse response = httpclient.execute(httpget);  
      try {  
          System.out.println("----------------------------------------");  
          System.out.println(response.getStatusLine());  
          System.out.println(EntityUtils.toString(response.getEntity()));  
        } finally {  
          response.close();  
        }  
  }  finally {  
      httpclient.close();  
   }  
  }  
}

如果我使用 Web 服务凭据从浏览器打开 URL，我就能够获取数据。但是当我运行我的 java 代码时，它会抛出 java.net.SocketException: Connection reset

更新

我使用的是 Java 1.8 (jdk1.8.0_121)。我将版本更改为 1.6 (jdk1.6.0_24) 并重新运行上述程序，我得到了预期的 json 输出。我不确定为什么它在 Java 1.8 版本中失败。

以下是在 Java 1.8 中运行时的 ssl 调试日志

*** ClientHello, TLSv1.2  
RandomCookie:  GMT: 1498393794 bytes = { 12, 120, 234, 134, 188, 168, 18, 119, 116, 190, 203, 67, 203, 117, 140, 58, 11, 37, 238, 63, 195, 158, 126, 45, 223, 152, 145, 239 }  
Session ID:  {}  
Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]  
Compression Methods:  { 0 }  
Extension elliptic_curves, curve names: {secp256r1, secp384r1, secp521r1, sect283k1, sect283r1, sect409k1, sect409r1, sect571k1, sect571r1, secp256k1}  
Extension ec_point_formats, formats: [uncompressed]  
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA256withDSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA  
Extension server_name, server_name: [type=host_name (0), value=instance.service-now.com]  
***  
main, WRITE: TLSv1.2 Handshake, length = 194  
main, waiting for close_notify or alert: state 1  
main, Exception while waiting for close java.net.SocketException: Connection reset  
main, handling exception: java.net.SocketException: Connection reset  
main, SEND TLSv1.2 ALERT:  fatal, description = unexpected_message  
main, WRITE: TLSv1.2 Alert, length = 2  
main, Exception sending alert: java.net.SocketException: Connection reset by peer: socket write error  
main, called closeSocket()  
Allow unsafe renegotiation: false  
Allow legacy hello messages: true  
Is initial handshake: true  
Is secure renegotiation: false  
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1.1  
%% No cached client session  
*** ClientHello, TLSv1.2  
RandomCookie:  GMT: 1498393854 bytes = { 85, 197, 18, 247, 65, 37, 118, 123, 184, 222, 135, 136, 206, 199, 231, 124, 208, 237, 123, 64, 244, 31, 61, 23, 131, 135, 41, 99 }  
Session ID:  {}  
Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]  
Compression Methods:  { 0 }  
Extension elliptic_curves, curve names: {secp256r1, secp384r1, secp521r1, sect283k1, sect283r1, sect409k1, sect409r1, sect571k1, sect571r1, secp256k1}  
Extension ec_point_formats, formats: [uncompressed]  
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA256withDSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA  
Extension server_name, server_name: [type=host_name (0), value=instance.service-now.com]  
***  
main, WRITE: TLSv1.2 Handshake, length = 194  
main, waiting for close_notify or alert: state 1  
main, Exception while waiting for close java.net.SocketException: Connection reset  
main, handling exception: java.net.SocketException: Connection reset  
main, SEND TLSv1.2 ALERT:  fatal, description = unexpected_message  
main, WRITE: TLSv1.2 Alert, length = 2  
main, Exception sending alert: java.net.SocketException: Connection reset by peer: socket write error  
main, called closeSocket()  
Allow unsafe renegotiation: false  
Allow legacy hello messages: true  
Is initial handshake: true  
Is secure renegotiation: false  
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1  
Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 for TLSv1.1  
Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 for TLSv1.1  
%% No cached client session  
*** ClientHello, TLSv1.2  
RandomCookie:  GMT: 1498394170 bytes = { 217, 71, 119, 16, 216, 43, 85, 204, 44, 23, 245, 62, 134, 87, 162, 228, 248, 194, 9, 10, 45, 170, 236, 196, 114, 95, 34, 181 }  
Session ID:  {}  
Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]  
Compression Methods:  { 0 }  
Extension elliptic_curves, curve names: {secp256r1, secp384r1, secp521r1, sect283k1, sect283r1, sect409k1, sect409r1, sect571k1, sect571r1, secp256k1}  
Extension ec_point_formats, formats: [uncompressed]  
Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA256withDSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA  
Extension server_name, server_name: [type=host_name (0), value=instance.service-now.com]  
***  
main, WRITE: TLSv1.2 Handshake, length = 194  
main, waiting for close_notify or alert: state 1  
Exception in thread "main" main, Exception while waiting for close java.net.SocketException: Connection reset  
main, handling exception: java.net.SocketException: Connection reset  
main, SEND TLSv1.2 ALERT:  fatal, description = unexpected_message  
main, WRITE: TLSv1.2 Alert, length = 2  
main, Exception sending alert: java.net.SocketException: Connection reset by peer: socket write error  
main, called closeSocket()  
java.net.SocketException: Connection reset  
  at java.net.SocketInputStream.read(Unknown Source)  
  at java.net.SocketInputStream.read(Unknown Source)  
  at sun.security.ssl.InputRecord.readFully(Unknown Source)  
  at sun.security.ssl.InputRecord.read(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.waitForClose(Unknown Source)  
  at sun.security.ssl.HandshakeOutStream.flush(Unknown Source)  
  at sun.security.ssl.Handshaker.kickstart(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.kickstartHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)  
  at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)  
  at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:396)  
  at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:355)  
  at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)  
  at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)  
  at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)  
  at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)  
  at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)  
  at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)  
  at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)  
  at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)  
  at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)  
  at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)  
  at com.reports.volumetric.Demo.go(Demo.java:67)  
  at com.reports.volumetric.Demo.main(Demo.java:33)
4

1 回答 1

0

也许您可以尝试使用不同的方式来查询 API 数据。下面的代码可以很好地从我的实例中获取事件数据。

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

    public class NetClientGet {

        // API Called: https://<instance>.service-now.com/api/now/table/incident?sysparm_limit=1

        public static void main(String[] args) {

            try {

                URL url = new URL(
                        "https://milind.service-now.com/api/now/table/incident?sysparm_limit=1");
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setRequestProperty("Accept", "application/json");
                conn.setRequestProperty("Content-Type", "application/json");
                conn.setRequestProperty("Authorization",
                        "<your base64 encoded authorization>");

                if (conn.getResponseCode() != 200) {
                    throw new RuntimeException("Failed : HTTP error code : "
                            + conn.getResponseCode());
                }

                BufferedReader br = new BufferedReader(new InputStreamReader(
                        (conn.getInputStream())));

                String output;
                System.out.println("Output from Server .... \n");
                while ((output = br.readLine()) != null) {
                    System.out.println(output);
                }

                conn.disconnect();

            } catch (MalformedURLException e) {

                e.printStackTrace();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

API 调用：https://.service-now.com/api/now/table/incident?sysparm_limit=1

输出：来自服务器的输出 ....

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于 2017-08-04T21:46:03.260 回答