How do I use Spring Boot to serve static content located in Dropbox folder

Question

I have a Spring Boot web application  and I would like to serve static content located in a shared Dropbox directory on my Linode VPS    Dropbox images    I ve read that Spring Boot will automatically serve static content from   classpath  META-INF resources     classpath  resources     classpath  static     classpath  public      but of course my Dropbox directory is not on the classpath   Although I could configure Apache to serve the images in my Dropbox folder  I would like to take advantage of Spring Security to restrict access of the static content to authenticated users

User · Answer

Mark Sch  fer  Never too late  but add a slash     after static   spring resources static-locations file  opt x y z static    So http    lt host gt  index html is now reachable

User · Answer

You can add your own static resource handler  it overwrites the default   e g    Configuration public class StaticResourceConfiguration extends WebMvcConfigurerAdapter        Override     public void addResourceHandlers ResourceHandlerRegistry registry            registry addResourceHandler        addResourceLocations  file  path to my dropbox               There is some documentation about this in Spring Boot  but it s really just a vanilla Spring MVC feature   Also since spring boot 1 2  I think  you can simply set spring resources staticLocations

User · Answer

Note that WebMvcConfigurerAdapter is deprecated now  see WebMvcConfigurerAdapter   Due to Java 8 default methods  you only have to implement WebMvcConfigurer

User · Answer

FWIW  I didn t have any success with the spring resources static-locations recommended above  what worked for me was setting spring thymeleaf prefix   report location file  Users bill report html  spring thymeleaf prefix   report location

User · Answer

Based on  Dave Syers answer I add the following class to my  Spring Boot project    Configuration public class StaticResourceConfiguration extends WebMvcConfigurerAdapter     private static final Logger LOG   LoggerFactory getLogger StaticResourceConfiguration class      Value    static path     private String staticPath     Override  public void addResourceHandlers ResourceHandlerRegistry registry         if staticPath    null            LOG info  Serving static content from     staticPath           registry addResourceHandler        addResourceLocations  file     staticPath                 see https   stackoverflow com questions 27381781 java-spring-boot-how-to-map-my-my-app-root-to-index-html   Override  public void addViewControllers ViewControllerRegistry registry        registry addViewController      setViewName  redirect  index html           This allows me to start my spring boot app with the parameter --static path like  java -jar spring-app-1 0-SNAPSHOT jar --static path  path to my static-files    This can be very handy for development and testing

User · Answer

There s a property spring resources staticLocations that can be set in the application properties  Note that this will override the default locations  See org springframework boot autoconfigure web ResourceProperties

User · Answer

Based on  Dave Syer   kaliatech and  asmaier answers the springboot v2  way would be    Configuration  AutoConfigureAfter DispatcherServletAutoConfiguration class  public class StaticResourceConfiguration implements WebMvcConfigurer        Override   public void addResourceHandlers ResourceHandlerRegistry registry        String myExternalFilePath    file    C  temp whatever m          registry addResourceHandler   m      addResourceLocations myExternalFilePath

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Springboot  via Spring  now makes adding to existing resource handlers easy  See Dave Syers answer   To add to the existing static resource handlers  simply be sure to use a resource handler path that doesn t override existing paths    The two  also  notes below are still valid           Edit  The approach below is no longer valid   If you want to extend the default static resource handlers  then something like this seems to work    Configuration  AutoConfigureAfter DispatcherServletAutoConfiguration class  public class CustomWebMvcAutoConfig extends                     WebMvcAutoConfiguration WebMvcAutoConfigurationAdapter       Override   public void addResourceHandlers ResourceHandlerRegistry registry        String myExternalFilePath    file    C  Temp whatever m         registry addResourceHandler   m      addResourceLocations myExternalFilePath        super addResourceHandlers registry            The call to super addResourceHandlers sets up the default handlers   Also    Note the trailing slash on the external file path   Depends on your expectation for URL mappings   Consider reviewing the source code of WebMvcAutoConfigurationAdapter

User · Answer

OS  Win 10  Spring Boot  2 1 2   I wanted to serve static content from c  images  Adding this property worked for me   spring resources static-locations classpath  META-INF resources  classpath  resources  classpath  static  classpath  public  file    C  images    I found the original value of the property in the Spring Boot Doc Appendix A  This will make c  images image jpg to be accessible as http   localhost 8080 image jpg

User · Answer

To serve from file system   I added spring resources static-location file    frontend build in application properties  index html is present in the build folder  Use can also add absolute path   spring resources static-location file  User XYZ Desktop frontend build  I think similarly you can try adding Dropbox folder path

User · Answer

For the current Spring-Boot Version 1 5 3 the parameter is  spring resources static-locations  Update I configured   spring resources static-locations file  opt x y z static    and expected to get my index html living in this folder when calling  http    lt host gt  index html  This did not work  I had to include the folder name in the URL   http    lt host gt  static index html

User · Answer

You can place your folder in the root of the ServletContext   Then specify a relative or absolute path to this directory in application yml   spring    resources      static-locations  file some temp files    The resources in this folder will be available  for downloading  for example  at   http    lt host gt   lt port gt   lt context gt  your file csv

[apache] How do I use Spring Boot to serve static content located in Dropbox folder?

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