怎么通过tomcat中ManagerServlet远程部署项目

这篇文章将为大家详细讲解有关怎么通过tomcat中ManagerServlet远程部署项目，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

介绍

之前在邮政实习时，leader让我阅读tomcat的源代码，尝试自己实现远程部署项目的功能，于是便有了这此实践。
在Tomact中有一个Manager应用程序，它是用来管理已经部署的web应用程序，在这个应用程序中，ManagerServlet是他的主servlet，通过它我们可以获取tomcat的部分指标，远程管理web应用程序，不过这个功能会受到web应用程序部署中安全约束的保护。

当你请求ManagerServlet时，它会检查getPathInfo()返回的值以及相关的查询参数，以确定被请求的操作。它支持以下操作和参数(从servlet路径开始):

我们可以通过ManagerServlet中getPathInfo()提供的操作，将自己的项目远程部署到服务器上，下面将贴出我的实践代码，在实践它之前你只需要引入httpclient包和commons包。

封装统一的远程请求管理类

封装此类用于方便client请求ManagerServlet：

import java.io.File;import java.net.URL;import java.net.URLEncoder;import org.apache.commons.io.IOUtils;import org.apache.commons.lang.StringUtils;import org.apache.http.Header;import org.apache.http.HttpHost;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.auth.AuthScope;import org.apache.http.auth.Credentials;import org.apache.http.auth.UsernamePasswordCredentials;import org.apache.http.client.AuthCache;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpRequestBase;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.impl.conn.PoolingClientConnectionManager;import org.apache.http.protocol.BasicHttpContext;public class TomcatManager {  private static final String MANAGER_CHARSET = "UTF-8";  private String username;  private URL url;  private String password;  private String charset;  private boolean verbose;  private DefaultHttpClient httpClient;  private BasicHttpContext localContext;  /** constructor */  public TomcatManager(URL url, String username) {    this(url, username, "");  }  public TomcatManager(URL url, String username, String password) {    this(url, username, password, "ISO-8859-1");  }  public TomcatManager(URL url, String username, String password, String charset) {    this(url, username, password, charset, true);  }  public TomcatManager(URL url, String username, String password, String charset, boolean verbose) {    this.url = url;    this.username = username;    this.password = password;    this.charset = charset;    this.verbose = verbose;        // 创建网络请求相关的配置    PoolingClientConnectionManager poolingClientConnectionManager = new PoolingClientConnectionManager();    poolingClientConnectionManager.setMaxTotal(5);    this.httpClient = new DefaultHttpClient(poolingClientConnectionManager);    if (StringUtils.isNotEmpty(username)) {      Credentials creds = new UsernamePasswordCredentials(username, password);      String host = url.getHost();      int port = url.getPort() > -1 ? url.getPort() : AuthScope.ANY_PORT;      httpClient.getCredentialsProvider().setCredentials(new AuthScope(host, port), creds);      AuthCache authCache = new BasicAuthCache();      BasicScheme basicAuth = new BasicScheme();      HttpHost targetHost = new HttpHost(url.getHost(), url.getPort(), url.getProtocol());      authCache.put(targetHost, basicAuth);      localContext = new BasicHttpContext();      localContext.setAttribute(ClientContext.AUTH_CACHE, authCache);    }  }  /** 根据指定的path部署并启动一个新的应用程序 */  public TomcatManagerResponse deploy(String path, File war, boolean update) throws Exception {    StringBuilder buffer = new StringBuilder("/deploy");    buffer.append("?path=").append(URLEncoder.encode(path, charset));    if (war != null) {      buffer.append("&war=").append(URLEncoder.encode(war.toString(), charset));    }    if (update) {      buffer.append("&update=true");    }    return invoke(buffer.toString());  }  /** 获取所有已部署的web应用程序的上下文路径。格式为path:status:sessions(活动会话数) */  public TomcatManagerResponse list() throws Exception {    StringBuilder buffer = new StringBuilder("/list");    return invoke(buffer.toString());  }  /** 获取系统信息和JVM信息 */  public TomcatManagerResponse serverinfo() throws Exception {    StringBuilder buffer = new StringBuilder("/serverinfo");    return invoke(buffer.toString());  }  /** 真正发送请求的方法 */  private TomcatManagerResponse invoke(String path) throws Exception {    HttpRequestBase httpRequestBase = new HttpGet(url + path);    HttpResponse response = httpClient.execute(httpRequestBase, localContext);    int statusCode = response.getStatusLine().getStatusCode();    switch (statusCode) {      case HttpStatus.SC_OK: // 200      case HttpStatus.SC_CREATED: // 201      case HttpStatus.SC_ACCEPTED: // 202        break;      case HttpStatus.SC_MOVED_PERMANENTLY: // 301      case HttpStatus.SC_MOVED_TEMPORARILY: // 302      case HttpStatus.SC_SEE_OTHER: // 303      String redirectUrl = getRedirectUrl(response);      this.url = new URL(redirectUrl);      return invoke(path);    }    return new TomcatManagerResponse().setStatusCode(response.getStatusLine().getStatusCode())        .setReasonPhrase(response.getStatusLine().getReasonPhrase())        .setHttpResponseBody(IOUtils.toString(response.getEntity().getContent()));  }    /** 提取重定向URL */  protected String getRedirectUrl(HttpResponse response) {    Header locationHeader = response.getFirstHeader("Location");    String locationField = locationHeader.getValue();    // is it a relative Location or a full ?    return locationField.startsWith("http") ? locationField : url.toString() + '/' + locationField;  }}

封装响应结果集

@Datapublic class TomcatManagerResponse {  private int statusCode;  private String reasonPhrase;  private String httpResponseBody;}

测试远程部署

在测试之前请先在配置文件放通下面用户权限：

下面是测试成功远程部署war包的代码：

import static org.testng.AssertJUnit.assertEquals;import java.io.File;import java.net.URL;import org.testng.annotations.Test;public class TestTomcatManager {  @Test  public void testDeploy() throws Exception {    TomcatManager tm = new TomcatManager(new URL("http://localhost:8080/manager/text"), "sqdyy", "123456");    File war = new File("E:\\tomcat\\simple-war-project-1.0-SNAPSHOT.war");    TomcatManagerResponse response = tm.deploy("/simple-war-project-1.0-SNAPSHOT", war, true);    System.out.println(response.getHttpResponseBody());    assertEquals(200, response.getStatusCode());        // output:    // OK - Deployed application at context path /simple-war-project-1.0-SNAPSHOT  }  @Test  public void testList() throws Exception {    TomcatManager tm = new TomcatManager(new URL("http://localhost:8080/manager/text"), "sqdyy", "123456");    TomcatManagerResponse response = tm.list();    System.out.println(response.getHttpResponseBody());    assertEquals(200, response.getStatusCode());        // output:    // OK - Listed applications for virtual host localhost    // /:running:0:ROOT    // /simple-war-project-1.0-SNAPSHOT:running:0:simple-war-project-1.0-SNAPSHOT    // /examples:running:0:examples    // /host-manager:running:0:host-manager    // /manager:running:0:manager    // /docs:running:0:docs  }  @Test  public void testServerinfo() throws Exception {    TomcatManager tm = new TomcatManager(new URL("http://localhost:8080/manager/text"), "sqdyy", "123456");    TomcatManagerResponse response = tm.serverinfo();    System.out.println(response.getHttpResponseBody());    assertEquals(200, response.getStatusCode());        // output:    // OK - Server info    // Tomcat Version: Apache Tomcat/7.0.82    // OS Name: Windows 10    // OS Version: 10.0    // OS Architecture: amd64    // JVM Version: 1.8.0_144-b01    // JVM Vendor: Oracle Corporation  }}

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