Sometimes a full blown spring framework is not an option, and neither is an application server (e.g. when resources are limited). This library is a lightweight REST webservice implementation. It is based on jetty and is capable of starting a webservice on a low-end device like the Raspberry Pi in a few seconds (compared to minutes for spring-boot).
Light-WS is licensed under MIT license and can therefore be used in any project, even for commercial ones.
for Gradle
compile 'com.moebiusgames:light-ws:1.3'for Maven
<dependency>
<groupId>com.moebiusgames</groupId>
<artifactId>light-ws</artifactId>
<version>1.3</version>
</dependency>
@WebService("/ws")
public class MyWebService {
@GetMapping("/get/some/info/{id}")
public String getSomeInfo(@GetParameter("id") String id) {
return "Hello " + id;
}
@GetMapping("/get/some/otherthing/{id}")
@ResultMimeType("text/html; charset=utf-8") //without this the default mime type is text/plain
public Response<Item> getSomeInfo(@GetParameter("id") int id) {
Response<String> response = new Response("Hello " + id);
if (id < 100) {
return new Response(null, HttpServletResponse.SC_NOT_FOUND);
}
return new Response(new Item(id), HttpServletResponse.SC_OK);
}
@PostMapping("/post/sth")
public void getSomePost(@PostParameter MyObject obj) {
// (expects the post parameter to be type application/json)
// do sth. with obj ...
}
@PostMapping("/upload")
@ResultMimeType("text/html; charset=utf-8") //without this the default mime type is text/plain
public String uploadFile(@PostParameter UploadedFile uploadedFile) {
// use uploadedFile.openInputStream() to open the uploaded file for reading
return "<html><h1>Uploaded successfully</h1></html>";
}
}Then you can start the webserver like this:
Server server = new Server(8080);
server.setHandler(new HandlerList(
new WebServiceHandler<>(new MyWebService())
//...
));
server.start();Now you should be able to open http://localhost:8080/ws/get/some/info/123 and get a nice greeting. And you should also be able to post a JSON to /ws/post/sth.
Note that you can also mix get(path) parameters and post like this:
@PostMapping("/post/sth/{name}")
public void getSomePost(@PostParameter MyObject obj,
@GetParameter("name") String name) {
// (expects the post parameter to be type application/json)
// do sth. with obj ...
}mvn clean package