我在使用Breeze消耗我的OData时遇到了问题。我的api托管在另一台服务器上,我使用的是asp.net web api 2.0(随VS 2013预览一起提供)。我知道web api已正确配置为CORS,因为我已经测试了它没有微风,它工作正常。
这是启用CORS的web api 2.0代码:
var cors = new EnableCorsAttribute("http://localhost:7122/", "*", "*");
config.EnableCors(cors);
这是我的IEdmModel
private static IEdmModel CreateModel()
{
var modelBuilder = new ODataConventionModelBuilder {Namespace = "Test.Domain.Model"};
modelBuilder.EntitySet<MuscleGroup>("MuscleGroup");
modelBuilder.EntitySet<Exercise>("Exercises");
modelBuilder.EntitySet<ExerciseCategory>("ExerciseCategories");
modelBuilder.EntitySet<Muscle>("Muscle");
return modelBuilder.GetEdmModel();
}
这是控制器:
[EnableCors(origins: "http://localhost:7122", headers: "*", methods: "*")] //this enables CORS for controller
public class MuscleGroupController : EntitySetController<MuscleGroup, int>
{
private readonly DatabaseContext _databaseContext = new DatabaseContext();
[Queryable]
public override IQueryable<MuscleGroup> Get()
{
return _databaseContext.MuscleGroups;
}
protected override MuscleGroup GetEntityByKey(int key)
{
return _databaseContext.MuscleGroups.Find(key);
}
}
以下是我使用breeze消费OData的方法:
app.adminMuscleGroup.dataService = ( function(breeze, logger) {
breeze.config.initializeAdapterInstances({ dataService: "OData" });
var servicename = "http://localhost:23758/odata/";
var manager = new breeze.EntityManager(servicename);
manager.enableSaveQueuing(true);
var dataService = {
getAll: getAll,
};
return dataService;
function getAll() {
var query = breeze.EntityQuery.from("MuscleGroup").orderBy("Name");
return manager.executeQuery(query);
}
这是我得到的错误:
Failed to load resource: the server responded with a status of 400 (Bad Request) http://localhost:23758/odata/$metadata
Failed to load resource: Origin http://localhost:7122 is not allowed by Access-Control-Allow-Origin. http://localhost:23758/odata/$metadata
XMLHttpRequest cannot load http://localhost:23758/odata/$metadata. Origin http://localhost:7122 is not allowed by Access-Control-Allow-Origin. MuscleGroup:1
[Q] Unhandled rejection reasons (should be empty):
Array[0]
q.js:891
Error: Metadata query failed for: http://localhost:23758/odata/$metadata; Logger.js:52
我不知道的是为什么查询的网址是:http://localhost:23758/odata/$metadata
而不是http://localhost:23758/odata/$metadata#MuscleGroup
我知道this回答解释了如何使用带有CORS的breeze,但我相信这是先前的web api 2并且我不需要为CORS处理编写类,因为我现在可以使用:< / p>
var cors = new EnableCorsAttribute("http://localhost:7122/", "*", "*");
长话短说,我的api很好地处理CORS(我已经测试过了)但是由于某些原因它不适用于微风。
修改
我已从控制器中删除此行[EnableCors(origins: "http://localhost:7122", headers: "*", methods: "*")]
,并且刚刚启用了CROS globbaly,但现在我收到此错误:
[Q] Unhandled rejection reasons (should be empty):
Array[0]
q.js:891
Error: Metadata query failed for http://localhost:23758/odata/$metadata; Unable to process returned metadata: Cannot read property 'end' of null Logger.js:52
我不知道这个属性 end 是什么,因为它没有在我的实体中定义
答案 0 :(得分:5)
var cors = new EnableCorsAttribute(
"http://localhost:7122/",
"*",
"*",
"DataServiceVersion, MaxDataServiceVersion"
);
config.EnableCors(cors);
尝试将DataServiceVersion
和MaxDataServiceVersion
添加到EnableCorsAttribute
。
这对我有用。我找到了here。