Question

所以我创建了一个使用CORS与.NET MVC Sidecar项目进行通信的应用程序。一切都很好，除了在IE9中，POST请求失败。我有一个允许GET工作的library，但是POST请求仍然存在问题。似乎IE9剥离了contentType标头。服务器最终将其解释为appplication/octet-stream，而不是text/plain，这是我理解的实际上是由它设置的。

在我的WebAPIConfig.cs中，我有以下函数（由Register调用）：

private static void RegisterFormatters(HttpConfiguration config)
    {
        // enable browser viewing + jsonp
        config.Formatters.Add(new BrowserJsonFormatter());
        config.Formatters.Add(new JsonpMediaTypeFormatter(new BrowserJsonFormatter()));

        // prettify json: indented + camel case
        var json = config.Formatters.JsonFormatter;
        json.SerializerSettings.Formatting = Formatting.Indented;
        json.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

        // Tell the formatter to accept text/plain
        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/plain"));
        // When we use CORS on IE9, it strips off the content type. The server assigns it application/octet-stream
        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/octet-stream"));
    }

但是，Fiddler仍然告诉我，请求没有contentType，并且服务器无法处理application/octet-stream的contentType。

有人有这个工作吗？

Answer 1

根据http://caniuse.com/cors CORS受以下浏览器支持：Firefox 3.5 +，Internet Explorer 10 +，Google Chrome 4.0 +，Safari 4.0 +， Opera 12.0+和Opera Mobile 12.0 +

XDomainRequest可能能够帮助您（IE8 +）

<!DOCTYPE html>
<html>
<head>
<title>XDR</title>
<script type="text/javascript">
var xdr = new XDomainRequest();
xdr.open("get", "http://localhost:6504/api/resourcename/1");
xdr.onload=function()
{
alert(xdr.responseText);
}
xdr.send();
</script>

Answer 2

我最后通过创建与MediaTypeFormatter一起使用的application/octet-stream来解决此问题。（我的服务器不接受这些调用，因为我没有完成IIS重置（duh），但它仍然无法正确解析对象。

这是我最终使用的格式化程序。

public class OctetStreamMediaTypeFormatter : MediaTypeFormatter
{
    public OctetStreamMediaTypeFormatter()
    {
        // We only support octet-stream
        SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/octet-stream"));
    }

    public override Task<object> ReadFromStreamAsync(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger)
    {
        var task = new Task<object>(() =>
        {
            using (var reader = new StreamReader(readStream, Encoding.UTF8))
            {
                // The data is passed as somethign identical to a query string (but not in the query string)
                var dic = HttpUtility.ParseQueryString(reader.ReadToEnd());
                var json = JsonConvert.SerializeObject(dic.AllKeys.ToDictionary(k =>
                {
                    if (k.EndsWith("[]"))
                    {
                        return k.Substring(0, k.IndexOf("[]", StringComparison.OrdinalIgnoreCase));
                    }
                    else
                    {
                        return k;
                    }
                }, k =>
                {
                    var val = dic[k];
                    // We need to speciallly handle arrays
                    if (k.EndsWith("[]"))
                    {
                        // parse into separate values;
                        var values = val.Split(',');
                        val = values.Aggregate("[", (current, value) => current + ("'" + value + "',"));
                        if (val.EndsWith(","))
                        {
                            val = val.Substring(0, val.Length - 1);
                        }
                        val += "]";
                    }
                    return val;
                }));
                // It still puts it in as a string, which is not what we want, so we need to remove the quotes
                json = json.Replace("\"[", "[").Replace("]\"", "]");
                var obj = JsonConvert.DeserializeObject(json, type);
                return obj;
            }
        });

        task.Start();

        return task;
    }

    public override bool CanReadType(Type type)
    {
        return true;
    }

    public override bool CanWriteType(Type type)
    {
        return true;
    }
}

IE9中的CORS Post失败了

2 个答案: