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[英]how to request another api as Client in ServerResource method in Restlet
[英]Create a Client request inside a HTTP method in Restlet
有沒有一種方法可以在HTTP方法內發送客戶端請求?
例如,我有Items資源,並且它具有POST方法
@Post
public Representation acceptItem(Representation entity) {
1. get information from entity
2. create new Item
3. setStatus(Status.SUCCESS_CREATED)
4. send POST request of another resource (e.g. orders resource)
ClientResource ordersResource = new ClientResource(ordersURI);
orderResource.post(info);
}
碼:
公共類ItemsResource擴展了BaseResource {
/**
* Handle POST requests: create a new item.
*/
@Post
public Representation acceptItem(Representation entity) {
Representation result = null;
// Parse the given representation and retrieve pairs of
// "name=value" tokens.
Form form = new Form(entity);
String itemName = form.getFirstValue("name");
String itemDescription = form.getFirstValue("description");
// Register the new item if one is not already registered.
if (!getItems().containsKey(itemName)
&& getItems().putIfAbsent(itemName,
new Item(itemName, itemDescription)) == null) {
// Set the response's status and entity
setStatus(Status.SUCCESS_CREATED);
Representation rep = new StringRepresentation("Item created",
MediaType.TEXT_PLAIN);
// Indicates where is located the new resource.
rep.setLocationRef(getRequest().getResourceRef().getIdentifier() + "/"
+ itemName);
result = rep;
//**In this POST method, send another POST request on another resource**
ClientResource ordersResource = new ClientResource(
"http://localhost:8111/firstResource/orders");
ClientResource orderResource = null;
// Create a new item
Order order = new Order("order1", "this is an order.");
try {
Representation rO = ordersResource.post(getRepresentation(order));
orderResource = new ClientResource(rO.getLocationRef());
} catch (ResourceException e) {
System.out.println("Error status: " + e.getStatus());
System.out.println("Error message: " + e.getMessage());
}
} else { // Item is already registered.
setStatus(Status.CLIENT_ERROR_NOT_FOUND);
result = generateErrorRepresentation("Item " + itemName
+ " already exists.", "1");
}
return result;
}
}
因此,以這種方式,當客戶在項目資源上發送POST請求時,他不僅會創建項目,還會創建訂單。
我在我的代碼中嘗試過,但是導致錯誤:
Sep 16, 2014 6:57:49 PM org.restlet.engine.component.ClientRouter getNext
WARNING: The protocol used by this request is not declared in the list of client connectors. (HTTP/1.1). In case you are using an instance of the Component class, check its "clients" property.
Not Found (404) - The server has not found anything matching the request URI
如果我在主方法中放置這兩行( ClientResource ordersResource = new ClientResource(ordersURI); orderResource.post(info);
),它將起作用。 如果我將它們放入HTTP請求中,它將無法正常工作。
因此,我正在尋找一種以HTTP方法發送客戶端請求的方法?
您需要在web.xml的Servlet declation中添加以下init參數。 有了這個,您的應用程序將能夠進行HTTP HTTPS和FILE協議調用。
<init-param>
<param-name>org.restlet.clients</param-name>
<param-value>HTTP HTTPS FILE</param-value>
</init-param>
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