使用C＃调用REST服务时出现HTTP 500错误

Question

通过c＃调用以下REST时出现HTTP 500错误，但是我可以使用chrome REST Console进行POST

请求正文已发送（从REST控制台获取）

Request Url: http://dev-6666.amazonaws.com/CourseEnrollment
Request Method: POST
Status Code: 201
Params: {
    "MESSAGE-TYPE": "UserEnrollmentCreate",
    "PAYLOAD": "<userstd version=\"\"\"\"><user password=\"\"PSEUDO-5621b55a\"\" lastname=\"\"Wara\"\" emailaddress=\"\"student3@bloody.com\"\" loginid=\"\"BloodyStudent3\"\" firstname=\"\"Buddihi\"\" userid=\"\"19658121\"\" clientid=\"\"117112\"\" createdate=\"\"2014-04-29T03:55:54.873\"\" lastupdate=\"\"2014-05-29T03:55:54.873\"\"><userproperty propertyname=\"\"\"\" propertyvalue=\"\"\"\" createdate=\"\"\"\" lastupdate=\"\"\"\"></userproperty></user></userstd>"
}

使用的C＃方法（这是一个出现500错误的方法）

 private void TestCreateUser()
        {

            string requestData = "{\"MESSAGE-TYPE\":UserEnrollmentCreate,\"PAYLOAD\":\"<userstd version=\"\"\"\"><user password=\"\"PSEUDO-5621b55a\"\" lastname=\"\"Wara\"\" emailaddress=\"\"student3@bloody.com\"\" loginid=\"\"BloodyStudent3\"\" firstname=\"\"Buddihi\"\" userid=\"\"19658121\"\" clientid=\"\"117112\"\" createdate=\"\"2014-04-29T03:55:54.873\"\" lastupdate=\"\"2014-05-29T03:55:54.873\"\"><userproperty propertyname=\"\"\"\" propertyvalue=\"\"\"\" createdate=\"\"\"\" lastupdate=\"\"\"\"></userproperty></user></userstd>}";

            byte[] data = Encoding.UTF8.GetBytes(requestData);
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://dev-6666.amazonaws.com/CourseEnrollment");
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(data, 0, data.Length);
            dataStream.Close();

            WebResponse response = request.GetResponse();
            string result = new StreamReader(response.GetResponseStream()).ReadToEnd();

        }

Answer 1

形式URL编码的数据应采用（变量名）=（数据）＆（变量名）=（数据）的形式....

控制台表示有点混乱，因此实际数据字符串应为

string requestData = "MESSAGE-TYPE=UserEnrollmentCreate&PAYLOAD=<userstd version=\"\"\"\"><user password=\"\"PSEUDO-5621b55a\"\" lastname=\"\"Wara\"\" emailaddress=\"\"student3@bloody.com\"\" loginid=\"\"BloodyStudent3\"\" firstname=\"\"Buddihi\"\" userid=\"\"19658121\"\" clientid=\"\"117112\"\" createdate=\"\"2014-04-29T03:55:54.873\"\" lastupdate=\"\"2014-05-29T03:55:54.873\"\"><userproperty propertyname=\"\"\"\" propertyvalue=\"\"\"\" createdate=\"\"\"\" lastupdate=\"\"\"\"></userproperty></user></userstd>";

Answer 2

在您将application/json作为内容发布时指定application/x-www-form-urlencoded时，在有效的实现中响应应该为400。

WebApi可能尝试将内容解码为表单时返回500，而内容实际上是JSON，因此它是一个例外，因此返回500作为状态码。