使dropwizard中的cors无法正常工作 [英] Enabling cors in dropwizard not working
问题描述
我正在研究一个dropwizard应用程序和js ui来与api交互。我需要加载json数据来更新视图,但我必须在之前启用dropwizard中的cors。我做了一些工作人员,但似乎没有用,因为dropwizard总是返回204没有内容。
I'm working on a dropwizard application and js ui to interacte with the api. I need to load json data to update views but I have to enable cors in dropwizard before that. I did some staff but it seems not working because dropwizard returns allways 204 no content.
@Override
public void run(final BGConfiguration configuration, final Environment environment) throws Exception {
final Map<String, String> params = new HashMap<>();
params.put("Access-Control-Allow-Origin", "/*");
params.put("Access-Control-Allow-Credentials", "true");
params.put("Access-Control-Expose-Headers", "true");
params.put("Access-Control-Allow-Headers", "Content-Type, X-Requested-With");
params.put("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
environment.servlets().addFilter("cors", CrossOriginFilter.class).setInitParameters(params);
}
推荐答案
这里的错误是过滤器尚未通过 addMappingForUrlPatterns
方法配置URL路径。
The bug here is that the filter hasn't been configured with a URL path via the addMappingForUrlPatterns
method.
这对我来说使用了dropwizard 0.7 .1:
This worked for me using dropwizard 0.7.1:
import org.eclipse.jetty.servlets.CrossOriginFilter;
import javax.servlet.DispatcherType;
import java.util.EnumSet;
public void run(Configuration conf, Environment environment) {
// Enable CORS headers
final FilterRegistration.Dynamic cors =
environment.servlets().addFilter("CORS", CrossOriginFilter.class);
// Configure CORS parameters
cors.setInitParameter("allowedOrigins", "*");
cors.setInitParameter("allowedHeaders", "X-Requested-With,Content-Type,Accept,Origin");
cors.setInitParameter("allowedMethods", "OPTIONS,GET,PUT,POST,DELETE,HEAD");
// Add URL mapping
cors.addMappingForUrlPatterns(EnumSet.allOf(DispatcherType.class), true, "/*");
}
我假设你在浏览器中测试这个,但是你可以通过CLI验证如下curl命令:
I'm assuming you're testing this live in a browser, but you can verify via CLI with a curl command like this:
$ curl -H "Origin: http://example.com" \
-H "Access-Control-Request-Method: POST" \
-H "Access-Control-Request-Headers: X-Requested-With" \
-X OPTIONS --verbose \
http://localhost:8080
你应该看到一个一堆访问控制 - *
响应中的HTTP标头。
You should see a bunch of Access-Control-*
HTTP headers in the response.
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