Question

从我的Android应用程序中，我试图删除存储在tomcat的webapps目录中的图像。当我尝试以下代码时，它给我403状态代码。我在网上查了一下，发现如果请求是合法的，那么它会提供该代码但是禁止该操作。谁能告诉我哪里出错了。我的代码是：

HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("DELETE");
int responseCode = connection.getResponseCode();

当我尝试使用HttpClient时，它给了我同样的错误 - HTTP / 1.1 403 Forbidden

HttpClient httpClient = new DefaultHttpClient();
                  try {
                    httpClient.getParams().setParameter(
                            "http.socket.timeout", new Integer(90000));
                    HttpDelete delete = new HttpDelete(new URI(
                            "http://192.168.2.1:9090/LocationUpdaterServlet/images/"
                                    + userid));
                    Toast.makeText(Image.this, "Removing your picture", 5000).show();
                    HttpResponse response = httpClient.execute(delete);
                    if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
                        System.out.println(response.getStatusLine());
                    } else {
                        // Here every thing is fine.
                    }
                    HttpEntity resEntity = response.getEntity();
                    if (resEntity == null)
                        System.out
                                .println("---------Error No Response !!!-----");
                }catch (Exception ex) {
                    System.out.println("---------Error----"+ ex.getMessage());
                    ex.printStackTrace();
                } finally {
                    httpClient.getConnectionManager().shutdown();

                }

Answer 1

在web.xml中，启用其他http方法：

<servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</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>false</param-value>
    </init-param>
    <init-param>
        <param-name>readonly</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

默认情况下，在tomcat中加载参数debug和listings，而默认值readonly为true，这意味着只有GET和POST可用。

其他可用的参数：

     debug               Debugging detail level for messages logged     
                         by this servlet.  [0]                          

     fileEncoding        Encoding to be used to read static resources   
                         [platform default]                             

     input               Input buffer size (in bytes) when reading      
                         resources to be served.  [2048]                

     listings            Should directory listings be produced if there 
                         is no welcome file in this directory?  [false] 
                         WARNING: Listings for directories with many    
                         entries can be slow and may consume            
                         significant proportions of server resources.   

     output              Output buffer size (in bytes) when writing     
                         resources to be served.  [2048]                

     readonly            Is this context "read only", so HTTP           
                         commands like PUT and DELETE are               
                         rejected?  [true]                              

     readmeFile          File to display together with the directory    
                         contents. [null]                               

     sendfileSize        If the connector used supports sendfile, this  
                         represents the minimal file size in KB for     
                         which sendfile will be used. Use a negative    
                         value to always disable sendfile.  [48]        

     useAcceptRanges     Should the Accept-Ranges header be included    
                         in responses where appropriate? [true]

Answer 2

Tomcat提供了一个servlet init参数（readonly），而不是你可以设置为启用PUT，DELETE。

我遇到了一个不同但相关的问题，我注意到了这个参数。

请查看此处的文档以获取相关信息：http://tomcat.apache.org/tomcat-7.0-doc/default-servlet.html

http删除403错误tomcat

2 个答案: