Tomcat7/8开启WebDAV的支持

WebDAV是一种超文本传输协议，Tomcat默认是支持WebDAV的，且默认为禁用状态。

更多详细信息，请参考：

https://zh.wikipedia.org/wiki/WebDAV

http://www.webdav.org/

开启步骤如下：

1、在Tomcat的webapps目录下新建webdav文件夹，并在此文件夹下新建WEB-INF\web.xml文件

完整的文件目录为：C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\webdav\WEB-INF\web.xml

配置Servlet，添加如下节点：

    <servlet>
        <servlet-name>webdav</servlet-name>
        <servlet-class>org.apache.catalina.servlets.WebdavServlet</servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>0</param-value>
        </init-param>
        <init-param>
            <param-name>listings</param-name>
            <param-value>true</param-value>
        </init-param>
        <!-- Read-Write Access Settings -->
        <init-param>
            <param-name>readonly</param-name>
            <param-value>false</param-value>
        </init-param>
    </servlet>
    <!-- URL Mapping -->
    <servlet-mapping>
        <servlet-name>webdav</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

配置权限，添加如下节点：

　　<security-constraint>
        <web-resource-collection>
            <web-resource-name>webdav</web-resource-name>
            <!-- Detect WebDAV Methods in URL For Whole Application -->
            <url-pattern>/*</url-pattern>
            <http-method>PROPFIND</http-method>
            <http-method>PROPPATCH</http-method>
            <http-method>COPY</http-method>
            <http-method>MOVE</http-method>
            <http-method>LOCK</http-method>
            <http-method>UNLOCK</http-method>
        </web-resource-collection>
        <!-- Restrict access by role -->
        <auth-constraint>
            <role-name>*</role-name>
        </auth-constraint>
    </security-constraint>
    <login-config>
        <auth-method>BASIC</auth-method>
        <realm-name>webdav</realm-name>
    </login-config>
    <security-role>
        <description>WebDAV User</description>
        <role-name>webdav</role-name>
    </security-role>

提示：<role-name>为自定义权限名称。

根据上面权限名称，在Tomcat账号体系中增加账号密码，配置如下：

打开C:\Program Files\Apache Software Foundation\Tomcat 7.0\conf\tomcat-users.xml

    <role rolename="webdav"/>
    <user username="root" password="root" roles="webdav"/>

提示：权限名称必须和web.xml文件配置的一一对应。

完整的web.xml文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID" version="3.0">
    <display-name>webdav</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
    <servlet>
        <servlet-name>webdav</servlet-name>
        <servlet-class>org.apache.catalina.servlets.WebdavServlet</servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>0</param-value>
        </init-param>
        <init-param>
            <param-name>listings</param-name>
            <param-value>true</param-value>
        </init-param>
        <!-- Read-Write Access Settings -->
        <init-param>
            <param-name>readonly</param-name>
            <param-value>false</param-value>
        </init-param>
    </servlet>
    <!-- URL Mapping -->
    <servlet-mapping>
        <servlet-name>webdav</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    <security-constraint>
        <web-resource-collection>
            <web-resource-name>webdav</web-resource-name>
            <!-- Detect WebDAV Methods in URL For Whole Application -->
            <url-pattern>/*</url-pattern>
            <http-method>PROPFIND</http-method>
            <http-method>PROPPATCH</http-method>
            <http-method>COPY</http-method>
            <http-method>MOVE</http-method>
            <http-method>LOCK</http-method>
            <http-method>UNLOCK</http-method>
        </web-resource-collection>
        <!-- Restrict access by role -->
        <auth-constraint>
            <role-name>*</role-name>
        </auth-constraint>
    </security-constraint>
    <login-config>
        <auth-method>BASIC</auth-method>
        <realm-name>webdav</realm-name>
    </login-config>
    <security-role>
        <description>WebDAV User</description>
        <role-name>webdav</role-name>
    </security-role>
</web-app>

整个站点文件：链接：http://pan.baidu.com/s/1mit5KO4 密码：ykkj

配置完成后，重启Tomcat，然后访问站点，出现如下样式证明已经成功：

参考：

https://www.mulesoft.com/cn/tcat/tomcat-webdav（Tomcat配置）

https://my.oschina.net/liangrockman/blog/39462（Tomcat配置）

http://www.yiibai.com/article/enable-webdav-in-apache-server-2-2-x-windows.html（Apache的配置）