我设法为单个 Web 请求获得了两个响应：
- 我的 webapi 响应（带有 200 状态码的简单字符串）
- 一个 404，看起来像一个静态文件处理程序
来自 chrome 的屏幕截图：
我的设置是：
- F＃
- Ubuntu 15.10 上的单声道
- xsp4 作为网络服务器
- Owin作为路由引擎
正如您从屏幕截图中看到的那样，在浏览器响应的第一行打印了正确的响应（有时 - 叹息），然后立即在页面上跟随标准 404 页面。
启动代码：
type Startup() =
static member RegisterWebApi(config: HttpConfiguration) =
// Configure routing
config.MapHttpAttributeRoutes()
// Configure serialization
config.Formatters.XmlFormatter.UseXmlSerializer <- true
config.Formatters.JsonFormatter.SerializerSettings.ContractResolver <- Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()
member __.Configuration(builder: IAppBuilder) =
let config = new HttpConfiguration()
Startup.RegisterWebApi(config)
builder.UseWebApi(config) |> ignore
builder.UseErrorPage() |> ignore
控制器代码：
[<RoutePrefix("api")>]
type WordsearchController() =
inherit ApiController()
[<Route("")>]
member this.Get() =
this.Request.CreateResponse<string>(HttpStatusCode.OK, "This is my simple output")
我尝试删除 web.config 中的静态文件处理程序，在启动时使用 MVC 样式路由映射，以及控制器的各种路由属性。
似乎 webapi 路由和静态文件处理程序都将他们的两分钱投入到响应中，而不是一个压倒另一个。
根据来自@mark 的请求，该请求是对http://localhost:9000/api的简单 GET ，响应为：
标题
HTTP/1.0 404 Not Found
Date: Mon, 18 Jan 2016 00:11:17 GMT
Server: Mono.WebServer.XSP/4.2.0.0 Linux
X-AspNet-Version: 4.0.30319
Content-Length: 5085
Cache-Control: private
Content-Type: text/html
Keep-Alive: timeout=15, max=94
Connection: Keep-Alive
身体
GET api
404 Not Found
localhost:9000
5.0 KB
127.0.0.1:9000
2ms
HeadersResponseHTMLCache
<string>This is my simple output</string><?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional
.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
body { background-color: #FFFFFF; font-size: .75em; font-family: Verdana, Helvetica, Sans-Serif; margin
: 0; padding: 0; color: #696969; }
a:link { color: #000000; text-decoration: underline; }
a:visited { color: #000000; }
a:hover { color: #000000; text-decoration: none; }
a:active { color: #12eb87; }
p, ul { margin-bottom: 20px; line-height: 1.6em; }
pre { font-size: 1.2em; margin-left: 20px; margin-top: 0px; }
h1, h2, h3, h4, h5, h6 { font-size: 1.6em; color: #000; font-family: Arial, Helvetica, sans-serif; }
h1 { font-weight: bold; margin-bottom: 0; margin-top: 0; padding-bottom: 0; }
h2 { font-size: 1em; padding: 0 0 0px 0; color: #696969; font-weight: normal; margin-top: 0; margin-bottom
: 20px; }
h2.exceptionMessage { white-space: pre; }
h3 { font-size: 1.2em; }
h4 { font-size: 1.1em; }
h5, h6 { font-size: 1em; }
#header { position: relative; margin-bottom: 0px; color: #000; padding: 0; background-color: #5c87b2
; height: 38px; padding-left: 10px; }
#header h1 { font-weight: bold; padding: 5px 0; margin: 0; color: #fff; border: none; line-height: 2em
; font-family: Arial, Helvetica, sans-serif; font-size: 32px !important; }
#header-image { float: left; padding: 3px; margin-left: 1px; margin-right: 1px; }
#header-text { color: #fff; font-size: 1.4em; line-height: 38px; font-weight: bold; }
#main { padding: 20px 20px 15px 20px; background-color: #fff; _height: 1px; }
#footer { color: #999; padding: 5px 0; text-align: left; line-height: normal; margin: 20px 0px 0px 0px
; font-size: .9em; border-top: solid 1px #5C87B2; }
#footer-powered-by { float: right; }
.details { font-family: monospace; border: solid 1px #e8eef4; white-space: pre; font-size: 1.2em; overflow
: auto; padding: 6px; margin-top: 6px; background-color: #eeeeff; color: 555555 }
.details-wrapped { white-space: normal }
.details-header { margin-top: 1.5em }
.details-header a { font-weight: bold; text-decoration: none }
p { margin-bottom: 0.3em; margin-top: 0.1em }
.sourceErrorLine { color: #770000; font-weight: bold; }
</style>
<script type="text/javascript">
var hideElementsById = new Array ();
window.onload = function () {
if (!hideElementsById || hideElementsById.length < 1)
return;
for (index in hideElementsById)
toggle (hideElementsById [index]);
}
function toggle (divId)
{
var e = document.getElementById (divId);
if (!e)
return;
var h = document.getElementById (divId + "Hint");
if (e.style.display == "block" || e.style.display == "") {
e.style.display = "none";
if (h)
h.innerHTML = " (click to show)";
} else {
e.style.display = "block";
if (h)
h.innerHTML = " (click to hide)";
}
}
</script>
<title>Error 404</title>
</head>
<body>
<div class="page">
<div id="header">
<div id="header-text">Application Exception</div>
</div>
<div id="main">
<h1>System.Web.HttpException</h1>
<h2 class="exceptionMessage">The resource cannot be found.</h2>
<p><strong>Description:</strong> HTTP 404.The resource you are looking for (or one of its dependencies
) could have been removed, had its name changed, or is temporarily unavailable. Please review the following
URL and make sure that it is spelled correctly.</p><p><strong>Details:</strong> Requested URL: /api
</p>
<div><strong>Exception stack trace:</strong></div>
<div class="details"> at System.Web.StaticFileHandler.ProcessRequest (System.Web.HttpContext context
) <0x403b0a40 + 0x00733> in <filename unknown>:0
at System.Web.DefaultHttpHandler.BeginProcessRequest (System.Web.HttpContext context, System.AsyncCallback
callback, System.Object state) <0x403b0240 + 0x00153> in <filename unknown>:0
at System.Web.HttpApplication+<Pipeline>c__Iterator1.MoveNext () <0x40332110 + 0x04416>
; in <filename unknown>:0
at System.Web.HttpApplication.Tick () <0x40330c60 + 0x00057> in <filename unknown>:0 <
/div><div id="footer">
<div style="color:Black;"><strong>Version Information:</strong> <tt>4.2.1 (Stable 4.2.1.102/6dd2d0d
Thu Nov 12 09:52:44 UTC 2015)</tt>; ASP.NET Version: <tt>4.0.30319.17020</tt></div>
<div id="footer-powered-by">Powered by <a href="http://mono-project.com/">Mono</a></div>
</div>
</div>
</div>
</body>
</html>
<!--
[System.Web.HttpException]: Path '/api' was not found.
at System.Web.StaticFileHandler.ProcessRequest (System.Web.HttpContext context) <0x403b0a40 + 0x00733
> in <filename unknown>:0
at System.Web.DefaultHttpHandler.BeginProcessRequest (System.Web.HttpContext context, System.AsyncCallback
callback, System.Object state) <0x403b0240 + 0x00153> in <filename unknown>:0
at System.Web.HttpApplication+<Pipeline>c__Iterator1.MoveNext () <0x40332110 + 0x04416> in <filename
unknown>:0
at System.Web.HttpApplication.Tick () <0x40330c60 + 0x00057> in <filename unknown>:0
-->
1 request
5.0 KB
2ms (onload: 88ms)