postgresql Restlet 使用 json 接收和响应实现 post
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Restlet implementing post with json receive and response
提问by
First, what i wanted to know is what i am doing is the right way to do it.
首先，我想知道的是我在做什么是正确的方法。
I have a scenario where i have will receive a json request and i have to update the database with that, once the db is updated i have to respond back with the json acknowledgment.
我有一个场景，我将收到一个 json 请求，我必须用它更新数据库，一旦数据库更新，我必须用 json 确认响应。
What i have done so far is create the class extending application as follows:
到目前为止，我所做的是创建类扩展应用程序，如下所示：
@Override
public Restlet createRoot() {
// Create a router Restlet that routes each call to a
// new instance of ScanRequestResource.
Router router = new Router(getContext());
// Defines only one route
router.attach("/request", RequestResource.class);
return router;
}
My resource class is extending the ServerResource and i have the following method in my resource class
我的资源类正在扩展 ServerResource 并且我的资源类中有以下方法
@Post("json")
public Representation post() throws ResourceException {
try {
Representation entity = getRequestEntity();
JsonRepresentation represent = new JsonRepresentation(entity);
JSONObject jsonobject = represent.toJsonObject();
JSONObject json = jsonobject.getJSONObject("request");
getResponse().setStatus(Status.SUCCESS_ACCEPTED);
StringBuffer sb = new StringBuffer();
ScanRequestAck ack = new ScanRequestAck();
ack.statusURL = "http://localhost:8080/status/2713";
Representation rep = new JsonRepresentation(ack.asJSON());
return rep;
} catch (Exception e) {
getResponse().setStatus(Status.SERVER_ERROR_INTERNAL);
}
My first concern is the object i receive in the entity is inputrepresentation so when i fetch the jsonobject from the jsonrepresentation created i always get empty/null object.
我首先关心的是我在实体中收到的对象是 inputrepresentation，所以当我从创建的 jsonrepresentation 中获取 jsonobject 时，我总是得到空/空对象。
I have tried passing the json request with the following code as well as the client attached
我尝试使用以下代码以及附加的客户端传递 json 请求
function submitjson(){
alert("Alert 1");
$.ajax({
type: "POST",
url: "http://localhost:8080/thoughtclicksWeb/request",
contentType: "application/json; charset=utf-8",
data: "{request{id:1, request-url:http://thoughtclicks.com/status}}",
dataType: "json",
success: function(msg){
//alert("testing alert");
alert(msg);
}
});
};
Client used to call
客户端用来调用
ClientResource requestResource = new ClientResource("http://localhost:8080/thoughtclicksWeb/request");
Representation rep = new JsonRepresentation(new JSONObject(jsonstring));
rep.setMediaType(MediaType.APPLICATION_JSON);
Representation reply = requestResource.post(rep);
Any help or clues on this is hight appreciated ?
对此有何帮助或线索表示高度赞赏？
Thanks, Rahul
谢谢，拉胡尔
回答by Ashwin Jayaprakash
Using just 1 JAR jse-x.y.z/lib/org.restlet.jar, you could construct JSON by hand at the client side for simple requests:
仅使用 1 个 JAR jse-xyz/lib/org.restlet.jar，您可以在客户端手动构建 JSON 以处理简单请求：
ClientResource res = new ClientResource("http://localhost:9191/something/other");
StringRepresentation s = new StringRepresentation("" +
"{\n" +
"\t\"name\" : \"bank1\"\n" +
"}");
res.post(s).write(System.out);
At the server side, using just 2 JARs - gson-x.y.z.jarand jse-x.y.z/lib/org.restlet.jar:
在服务器端，只使用 2 个 JAR - gson-xyzjar和jse-xyz/lib/org.restlet.jar：
public class BankResource extends ServerResource {
@Get("json")
public String listBanks() {
JsonArray banksArray = new JsonArray();
for (String s : names) {
banksArray.add(new JsonPrimitive(s));
}
JsonObject j = new JsonObject();
j.add("banks", banksArray);
return j.toString();
}
@Post
public Representation createBank(Representation r) throws IOException {
String s = r.getText();
JsonObject j = new JsonParser().parse(s).getAsJsonObject();
JsonElement name = j.get("name");
.. (more) .. ..
//Send list on creation.
return new StringRepresentation(listBanks(), MediaType.TEXT_PLAIN);
}
}
回答by laz
When I use the following JSON as the request, it works:
当我使用以下 JSON 作为请求时，它可以工作：
{"request": {"id": "1", "request-url": "http://thoughtclicks.com/status"}}
Notice the double quotes and additional colon that aren't in your sample.
请注意示例中没有的双引号和额外的冒号。
