Spring Java découverte

Friday, November 18, 2016

Spring Boot + Spring Security + Servir ressources statiques depuis différents emplacements.

Naar de inhoud springen





Avec Spring, nous pouvons configurer des ressources statiques telles que des images, js et des fichiers css à partir d’emplacements spécifiques sous la racine de votre application Web, le classpath et d’autres emplacements. Nous pouvons même configurer plusieurs emplacements differents afin de servir des fichiers de types différents.
Une implémentation de l’interface WebMvcConfigurer dans la classe abstraite WebMvcConfigurerAdapter avec des méthodes vides permettant aux sous-classes de ne remplacer que les méthodes qui les intéressent. Pour obtenir et servir des ressources statiques à partir de différents emplacements, nous devons étendre (extend) la classe WebMvcConfigurerAdapter et nous devons implémenter(écraser) la méthode @Override addResourceHandlers () qui nous intéresse dans notre classe Application.
Prenons l’exemple simple pour servir des ressources statiques de types images et des fichiers texte à partir d’emplacements différents.
Dans cet exemple, nous allons charger des images et des fichiers texte à partir de différents emplacements comme :
  • images depuis C://images
  • text files depuis C://txtfiles
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>com.app</groupId>
 <artifactId>staticresourceloader</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>war</packaging>

 <name>staticresourceloader</name>
 <description>staticresourceloader project</description>

 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.2.5.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>

  <dependencies>
  
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-security</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-ws</artifactId>
  </dependency>
  
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-tomcat</artifactId>
   <scope>provided</scope>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
  </dependency>
 </dependencies>
 
 <build>
  <plugins>
   <plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
   </plugin>
  </plugins>
 </build>

</project>
application.properties
security.user.password=Efhj34tGVW

staticresourceloader.imageFileLocation.path:file:C:\\images\\

staticresourceloader.txtFileLocation.path:file:C:\\txtfiles\\
Application.java
package com.app.staticresourceloader;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@ComponentScan
@EnableAutoConfiguration
@SpringBootApplication
public class Application extends WebMvcConfigurerAdapter  {

 @Value("${staticresourceloader.imageFileLocation.path}")
    private String staticImageFilePath;
 
 @Value("${staticresourceloader.txtFileLocation.path}")
    private String staticTxtFilePath;
 
 public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
    
 @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/api/image/**").addResourceLocations(staticImageFilePath);
        registry.addResourceHandler("/api/txt/**").addResourceLocations(staticTxtFilePath);
    }    
}
ServletInitializer.java
package com.app.staticresourceloader;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

 @Override
 protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
  return application.sources(Application.class);
 } 
}
MyController.java
package com.app.staticresourceloader;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;


@Controller
public class MyController {

 @Value("${staticresourceloader.imageFileLocation.path}")
    private String staticImageFilePath;
 
 @Value("${staticresourceloader.txtFileLocation.path}")
    private String staticTxtFilePath;
 
 
 @RequestMapping(value="/api/getImageList", method=RequestMethod.GET, headers="Accept=application/json")
 public ResponseEntity<Collection<String>> getImageList(){
  
  Collection<String> fileList = fileList(staticImageFilePath, "image");
  
  return new ResponseEntity<Collection<String>>(fileList, HttpStatus.OK);
 } 
 
        @RequestMapping(value="/api/getTxtList", method=RequestMethod.GET, headers="Accept=application/json")
 public ResponseEntity<Collection<String>> getTxtFileList(){
  
  Collection<String> fileList = fileList(staticTxtFilePath, "txt");
  
  return new ResponseEntity<Collection<String>>(fileList, HttpStatus.OK);
 } 
 
        public Collection<String> fileList(String folderPath, String type) {
  
  File directory = new File(folderPath.replace("file:", ""));
  File[] fList = directory.listFiles();
  
  Collection<String> list = new ArrayList<String>();
  
  for (File file : fList) {
   
   list.add("http://localhost:8080/api/"+type+"/"+file.getName());
  }  
  return list;
 } 
}
Spring Boot + Spring Security + Serve static resources from different locations
OUTPUT:
Spring Boot + Spring Security + Serve static resources from different locations

Spring Boot + Spring Security + Serve static resources from different locations

Spring Boot + Spring Security + Serve static resources from different locations

Spring Boot + Spring Security + Serve static resources from different locations

Spring Boot + Spring Security + Serve static resources from different locations




    Posted by Achille at 11:32 PM
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