部署的代码不起作用，但在本地起作用

时间：2019-07-25 18:22:28

标签： java rest google-app-engine servlets

我正在建立一个休息服务，以便通过发帖请求上传文件。 我有两个servlet，首先接收请求并更改URI，以调用blob键，然后将请求转发到将要保存文件的servlet。

我的servlet如下：

uploadfiles.java

    /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package costache.examproject;

import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Gabriel
 */
public class uploadfiles extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();

            String bloblink = blobstoreService.createUploadUrl("/upload");

            String[] linkcut = bloblink.split("_ah");
            String newUri = "_ah" + linkcut[1];
            request.getRequestDispatcher(newUri).forward(request, response);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}

upload.java 

package costache.examproject;
import java.io.IOException;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;

public class upload extends HttpServlet {
    private BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();

    @Override
    public void doPost(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException {

        Map<String, List<BlobKey>> blobs = blobstoreService.getUploads(req);
        List<BlobKey> blobKeys = blobs.get("myFile");

        if (blobKeys == null || blobKeys.isEmpty()) {
            res.sendRedirect("/");
        } else {
            res.sendRedirect("/serve?blob-key=" + blobKeys.get(0).getKeyString());
        }
    }
}

如果我尝试通过帖子发送文件，它将在本地运行（调试器会触发两个servlet的每个点），但是一旦部署在GAE上却没有，它会返回“错误：未找到”

表单HTML：

<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
    <head>

        <title>TODO supply a title</title>
        <meta charset="windows-1252">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <div>TODO write content</div>


        <form action="uploadfiles" method="post" enctype="multipart/form-data">

            Nome: <input id="n" type="text" name="foo">
            Consumer: <input id="c" type="text" name="consumer">
            Uploader: <input id="u" type="text" name="uploader">
            Contenuto: <input id="co" type="file" name="myFile">
            <input type="submit" />
        </form>
    </body>

</html>

Web.xml 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <display-name>examproject</display-name>
    <filter>
        <filter-name>ObjectifyFilter</filter-name>
        <filter-class>com.googlecode.objectify.ObjectifyFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>ObjectifyFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <listener>
        <listener-class>filters.OfyStarter</listener-class>
    </listener>
    <servlet>
        <servlet-name>registrazione</servlet-name>
        <servlet-class>costache.examproject.registrazione</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>login</servlet-name>
        <servlet-class>costache.examproject.login</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>upload</servlet-name>
        <servlet-class>costache.examproject.upload</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>serve</servlet-name>
        <servlet-class>costache.examproject.serve</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>caricafile</servlet-name>
        <servlet-class>costache.examproject.caricafile</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>upload2</servlet-name>
        <servlet-class>costache.examproject.upload2</servlet-class>
    </servlet>
    <servlet>
        <servlet-name>uploadfiles</servlet-name>
        <servlet-class>costache.examproject.uploadfiles</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>registrazione</servlet-name>
        <url-pattern>/registrazione</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>login</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>upload</servlet-name>
        <url-pattern>/upload</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>serve</servlet-name>
        <url-pattern>/serve</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>caricafile</servlet-name>
        <url-pattern>/caricafile</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>upload2</servlet-name>
        <url-pattern>/upload2</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>uploadfiles</servlet-name>
        <url-pattern>/uploadfiles</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
</web-app>

pom.xml 

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>costache</groupId>
    <artifactId>examproject-247809</artifactId>
    <packaging>war</packaging>
    <version>3</version>

    <name>test3</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-storage</artifactId>
            <version>1.82.0</version>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>com.google.appengine.tools</groupId>
            <artifactId>appengine-gcs-client</artifactId>
            <version>0.8</version> 
        </dependency>

        <dependency>
            <groupId>com.googlecode.json-simple</groupId>
            <artifactId>json-simple</artifactId>
            <version>1.1.1</version>
        </dependency>

        <dependency>
            <groupId>com.googlecode.objectify</groupId>
            <artifactId>objectify</artifactId>
            <version>5.1.22</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.google.appengine</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>1.9.64</version>
            </plugin>
        </plugins>
    </build>
</project>

另一个问题是注释不起作用，如果我尝试@MultiPartConfig或@WebServlet，它们实际上什么也没做。

0 个答案:

没有答案
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