我有一个界面,并希望将其作为REST API打开。
接口:
string createToken(String username, String scopes);
REST Web API:
@GET
@Path("/createToken")
@Override
public string createToken(@InjectParam String username, String scopes) {
...
}
作为一个简单的Java API,接口本身是有意义的 - 由特定(唯一)用户创建访问令牌。
但是,作为REST Web API,我需要上一步来检索用户名,这是基于http头中传递的一些用户数据,如SSO密钥。
如何将值注入username
- 从HTTP标头中提取?谢谢。
答案 0 :(得分:1)
创建Provider以将值注入自定义注释。请参阅小工作示例here。请参阅下面的内联源。
该示例从sso标记中提取用户名。这是一个虚拟提取。
*我没有使用@InjectParam
。
调用示例:
curl -X POST -H "ssoToken: 1234" http://localhost:8080/JerseyCustomParamInjection-1.0-SNAPSHOT/oauth2/createAccessToken
自定义注释:
@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface LoggedUser {
}
进行注射的提供者:
@Provider
public class LoggedUserProvider implements
Injectable<String>,
InjectableProvider<LoggedUser, Parameter> {
@Context
private HttpServletRequest request;
public LoggedUserProvider() {
}
@Override
public Injectable<String> getInjectable(ComponentContext cc, LoggedUser a, com.sun.jersey.api.model.Parameter c) {
return this;
}
@Override
public ComponentScope getScope() {
return ComponentScope.PerRequest;
}
@Override
public String getValue() {
String sso = request.getHeader("ssoToken");
if (sso == null) {
throw new WebApplicationException(Response.Status.UNAUTHORIZED);
}
// Retreive username from soo
String username = " <extracted username from sso="+sso+">";
return username;
}
}
定义要注入值的资源:
@Path("/oauth2")
public class Resource {
@POST
@Path("/createAccessToken")
public String createAccessToken(
@LoggedUser String username
) {
return username + " <created access token using the logged in injected username>";
}
}
Servlet配置(web.xml):
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Restful Web Application</display-name>
<servlet>
<servlet-name>jersey-serlvet</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>info.fastpace.jerseycustomparaminjection</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>jersey-serlvet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
答案 1 :(得分:0)
您应该使用HeaderParam
。见this
@GET
@Path("/createToken")
@Override
public string createToken(@HeaderParam("username") String username, String scopes) {
...
}
如果你必须提取用户名并且必须注入它,你将必须实现一个提供者:
@Provider
public class UsernameProvider
extends AbstractHttpContextInjectable<Locale>
implements InjectableProvider<Context, Type> {
@Override
public Injectable<E> getInjectable(ComponentContext compCntxt, Context cntxt, Type typ) {
if (typ.equals(String.class)) {
return this;
}
return null;
}
@Override
public ComponentScope getScope() {
return ComponentScope.PerRequest;
}
@Override
public String getValue(HttpContext httpCntxt) {
final Request rqst = httpCntxt.getRequest();
String username = null;
//Extract 'username' from Headers
return username;
}
}
详细解释here