MiniWeb

MiniWeb is a Http server library written in Java targeted for embedded projects. MiniWeb’s goals are to be small and lightweight as possible while providing simple and easy to use API. MiniWeb uses the very mature and robust Apache HttpComponents at its core. MiniWeb only supports what is necessary to get an embedded web project up and running quickly (no servlets).

Checkout the MiniWeb GitHub page

Example Usage

Create a server that serves files from “public” folder:

Server server = new ServerBuilder()  
    .port(9000)
    .mapLocation("/*", new File("public"))
    .create();

server.start();  

Controllers

Handle request programmatically is very simple with Controllers. The following example will respond the a request for /cgi/hello with the text world.

@Controller
class MyController {

@RequestMapping("hello")
public void handleHello(HttpRequest request, HttpResponse response) throws Exception {  
    StringEntity retval = new StringEntity("world");
    response.setEntity(retval);
    }
}

Server server = new ServerBuilder()  
    .port(9000)
    .mapController("/cgi/*", new MyController())
    .mapDirectory("/*", new File("public"))
    .create();

server.start();  

Query params

Controllers can even handle URL query params. For example:

@Controller
class MyController {

@RequestMapping("hello")
public void handleHello(@RequestParam("param1") String param1Value,  
         @RequestParam("bananas") int numBananas) {
    System.out.println("look param1 value is: " + param1);
    System.out.println("how many bananas? " + numBananas);
    }
}

Sending a /cgi/hello?param1=cool&bananas=5 and the value of param1Value would be “cool” and numBananas would be 5 as expected.

You can also use parts of the url path as parameters like so:

@RequestMapping(value = "request/{id}")
public void pathParam(@PathVariable("id") String myId, HttpResponse response) throws Exception {  
    StringEntity retval = new StringEntity(myId);
    response.setEntity(retval);
}

JSON REST Requests

Controllers can also be used to handle REST requests without all the overhead of parsing JSON manually. For example:

class MyModel {  
    String name;
}

@Controller
class MyController {

@RequestMapping("hello", method = RequestMethod.Post)
public void handleHello(@Body MyModel obj) {  
    System.out.println("automatically parsing json in the body and creating a POJO: " + obj);
    }
}

performing a POST to this endpoint with json: { "name": "awesome!" }. Note: the request must have a Content-Header header value set to application/json.

JSON REST Response

sending a response with JSON is also easy. Just add the @Body annotation to your handle methods.

class MyModel {  
String name;  
}

@Controller
class MyController {

@RequestMapping("hello")
@Body
public MyModel handleHello() {  
    //just create a new POJO and return it. MiniWeb will handle serializing it to JSON
    MyModel retval = new MyModel();
    retval.name = "rockin";
    return retval;
  }
}

Paul Soucy

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