Question

我尝试启用CORS，允许我的角度应用与新的MVC6 Web Api对话。

＆＃34; GET＆＃34;工作，但＆＃34; POST＆＃34;不会因为首先发送CORS预检。 IIS拦截此预检并作出响应。

在WebApi2中，我能够通过以下web.config设置阻止IIS拦截预检。

<configuration>
  <system.webServer>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET, HEAD, POST, DEBUG, DELETE, PUT, PATCH, OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>
</configuration>

然后我可以插入请求并返回我想要的标题＆＃34; OPTIONS＆＃34;。

protected void Application_BeginRequest(object sender, EventArgs e)
{
    if (Context.Request.Path.Contains("api/") && Context.Request.HttpMethod == "OPTIONS")
    {
        Context.Response.AddHeader("Access-Control-Allow-Origin", Context.Request.Headers["Origin"]);
        Context.Response.AddHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        Context.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
        Context.Response.AddHeader("Access-Control-Allow-Credentials", "true");
        Context.Response.End();
    }
}

我能够在新的MVC6 WebApi中完成这两项工作，但出于某种原因，我无法让IIS停止拦截＆＃34; OPTIONS＆＃34;预检。

我在MVC中使用此代码，我相信如果我只能让IIS停止拦截＆＃34; OPTIONS＆＃34;请求。

        app.Use(async (httpContext, next) =>
        {
            httpContext.Response.OnSendingHeaders((state) =>
            {

                if (httpContext.Request.Path.Value.Contains("api/") && httpContext.Request.Method == "OPTIONS")
                {
                    httpContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { httpContext.Request.Headers["Origin"] });
                    httpContext.Response.Headers.Add("Access-Control-Allow-Headers", new[] { "Origin, X-Requested-With, Content-Type, Accept" });
                    httpContext.Response.Headers.Add("Access-Control-Allow-Methods", new[] { "GET, POST, PUT, DELETE, OPTIONS" });
                    httpContext.Response.Headers.Add("Access-Control-Allow-Credentials", new[] { "true" });
                    return;
                }
            }, null);

            await next();

        });

有没有人对此有所了解或有一个有CORS工作的MVC6的工作示例？

由于

Answer 1

我建议一个正常工作：

app.Use(async (context, next) =>
{
    context.Response.Headers.Add("Access-Control-Allow-Origin", "*");
    context.Response.Headers.Add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
    context.Response.Headers.Add("Access-Control-Allow-Headers", new[] { "Content-Type, x-xsrf-token" });

    if (context.Request.Method == "OPTIONS")
    {
        context.Response.StatusCode = 200;
    }
    else
    {
        await next();
    }
});

IIS Intercept Preflight MVC6

1 个答案: