我想将结构化数据作为参数包含在我的HTTP GET调用中,并认为我已正确设置它,但我的API没有像我预期的那样接收数据。如何设置双方以传达结构化数据?
我的角度应用程序向Web API 2中编写的REST API提出了一个复杂的问题。
控制器方法定义为:
[RoutePrefix("v1/questions")]
public class VersionsController : ApiController
{
[Route("askComplicated")]
[HttpGet]
[ResponseType(typeof(ComplicatedResponseDto))]
public IHttpActionResult AskComplicatedQuestion(ComplicatedRequestDto complicatedRequest)
{
var responseElements = new List<ComplicatedResponseElementDto>();
foreach (var requestElement in complicatedRequest.Elements)
{
responseElements.Add(new ComplicatedResponseElementDto()
{
Id = requestElement.Id,
answer = "it is unknowable!!!"
});
}
return Ok(new ComplicatedResponseDto() { Elements = responseElements.ToArray()});
}
DTO:
public class ComplicatedRequestDto
{
public ComplicatedRequestElementDto[] Elements { get; set; }
}
public class ComplicatedRequestElementDto
{
public int Id { get; set; }
public string Question { get; set; }
}
public class ComplicatedResponseDto
{
public ComplicatedResponseElementDto[] Elements { get; set; }
}
public class ComplicatedResponseElementDto
{
public int Id { get; set; }
public string Answer { get; set; }
}
我以这种方式将其分解,因为我喜欢简单的请求和简单的响应。我采用了最适合我过去WCF工作的模式(并且理解这可能是我的问题)。
从角度来看,这是我的代码:
var request = $http({
method: "get",
url: "http://localhost:65520/v1/questions/askComplicated",
data: {
complicatedRequest : {
elements: [
{ id: 2, question: 'what is the meaning of life?' },
{ id: 3, question: 'why am I here?' },
{ id: 4, question: 'what stock should I pick?' }
]
}
}
});
return request.then(handleSuccess, handleError);
当我从我的角度应用程序调用REST API时,WEB API 2应用程序会收到它,但是ComplicatedRequestDto为null。如何正确发送数据以使其通过?
答案 0 :(得分:1)
从Get到Post更新您的API,因为当我们想要传递复杂对象时,它包含更多数据,我们有限制在URL中发送最大字符。 做以下修改:
[RoutePrefix("v1/questions")]
public class VersionsController : ApiController
{
[Route("askComplicated")]
[HttpPost]
[ResponseType(typeof(ComplicatedResponseDto))]
public IHttpActionResult AskComplicatedQuestion([FromBody]ComplicatedRequestDto complicatedRequest)
{
//write ur code here...
}
}
更新您的js代码,如下所示:
var request = $http({
method: "post",
url: "http://localhost:65520/v1/questions/askComplicated",
data: {
complicatedRequest : {
elements: [
{ id: 2, question: 'what is the meaning of life?' },
{ id: 3, question: 'why am I here?' },
{ id: 4, question: 'what stock should I pick?' }
]
},
}
});
return request.then(handleSuccess, handleError);
答案 1 :(得分:0)
您应该在方法参数之前添加 [FromUri] anotation,以通知WebAPI您要从应用程序Uri加载此参数,这是您在使用GET http操作时数据的用途数据参数。
所以你的代码应该是这样的
[RoutePrefix("v1/questions")]
public class VersionsController : ApiController
{
[Route("askComplicated")]
[HttpGet]
[ResponseType(typeof(ComplicatedResponseDto))]
public IHttpActionResult AskComplicatedQuestion([FromUri]ComplicatedRequestDto complicatedRequest)
{
var responseElements = new List<ComplicatedResponseElementDto>();
foreach (var requestElement in complicatedRequest.Elements)
{
responseElements.Add(new ComplicatedResponseElementDto()
{
Id = requestElement.Id,
answer = "it is unknowable!!!"
});
}
return Ok(new ComplicatedResponseDto() { Elements = responseElements.ToArray()});
}
您还必须更正有效负载以匹配类的结构。 corect值应如下所示:
{
"Elements": [
{
"Id": 1,
"Question": "sample string 2"
},
{
"Id": 1,
"Question": "sample string 2"
}
]
}
最后提供JavaScript代码示例(我只有jQuery,但Angular的有效负载相同):
$.ajax({url:"/v1/questions/askComplicated",data: {
"Elements": [
{
"Id": 2,
"Question": "what is the meaning of life?"
},
{
"Id": 3,
"Question": "why am I here?"
}
]
}})