从自托管的网络API控制台应用程序返回JSONP [英] Return jsonp from self hosted WEB API Console app
问题描述
我已经使用这个博客帖子描述的JSONP格式:<一个href=\"http://www.west-wind.com/weblog/posts/2012/Apr/02/Creating-a-JSONP-Formatter-for-ASPNET-Web-API\" rel=\"nofollow\">http://www.west-wind.com/weblog/posts/2012/Apr/02/Creating-a-JSONP-Formatter-for-ASPNET-Web-API
I've use the jsonp formatter described in this blog post: http://www.west-wind.com/weblog/posts/2012/Apr/02/Creating-a-JSONP-Formatter-for-ASPNET-Web-API
具有使用格式化使用自托管控制台应用程序试图人?
Has anybody tried using the formatter with a self hosted console application?
我试过在一个普通MVC 4项目格式化,并立即奏效。不过,我想在一个自托管控制台应用程序来使用它,我有很多的麻烦得到它的工作。
I've tried the formatter in a regular MVC 4 project, and it worked immediately. However, I would like to use it in a self hosted console application, and I've had a lot of trouble getting it to work.
我已经注册的格式,并验证它补充说:
I've registered the formatter, and verified that it is added:
var config = new HttpSelfHostConfiguration(serviceUrl);
config.Formatters.Insert(0, new JsonpMediaTypeFormatter());
我核实,当我提出用下面的code的请求格式化被调用:
I have verified that the formatter is being called when I make a request with the following code:
$("#TestButton").click(function () {
$.ajax({
url: 'http://localhost:8082/Api/Test',
type: 'GET',
dataType: 'jsonp',
success: function(data) {
alert(data.TestProperty);
}
});
})
我在提琴手检查,我得到的回应是:
I've checked in Fiddler, and the response I get is:
HTTP/1.1 504 Fiddler - Receive Failure
Content-Type: text/html; charset=UTF-8
Connection: close
Timestamp: 09:30:51.813
[Fiddler] ReadResponse() failed: The server did not return a response for this request.
我会非常感激,如果任何人都可以阐明这是怎么回事一些轻!
I'd be really grateful if anybody can shed some light on what is going on!
谢谢,
弗朗西斯
推荐答案
我怀疑的处置这里的StreamWriter引起的问题。尝试适应 WriteToStreamAsync
方法:
I suspect that Disposing the StreamWriter causes issues here. Try adapting the WriteToStreamAsync
method:
public override Task WriteToStreamAsync(
Type type,
object value,
Stream stream,
HttpContent content,
TransportContext transportContext
)
{
if (string.IsNullOrEmpty(JsonpCallbackFunction))
{
return base.WriteToStreamAsync(type, value, stream, content, transportContext);
}
// write the JSONP pre-amble
var preamble = Encoding.ASCII.GetBytes(JsonpCallbackFunction + "(");
stream.Write(preamble, 0, preamble.Length);
return base.WriteToStreamAsync(type, value, stream, content, transportContext).ContinueWith((innerTask, state) =>
{
if (innerTask.Status == TaskStatus.RanToCompletion)
{
// write the JSONP suffix
var responseStream = (Stream)state;
var suffix = Encoding.ASCII.GetBytes(")");
responseStream.Write(suffix, 0, suffix.Length);
}
}, stream, TaskContinuationOptions.ExecuteSynchronously);
}
这篇关于从自托管的网络API控制台应用程序返回JSONP的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!