使用Webservice请求uri太久

Question

我想通过需要这样的uri的网络服务进行创建：

http://<url>/webservice.php?operation=<operation>&elementType=<elementType>&element=<element>&

我的问题是，元素是html正文的电子邮件的所有信息，大约6000个字符。
我想这样称呼网址：

var request = WebRequest.Create(urlToUse.ToString());
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = urlToUse.Length;

var requestStream = request.GetRequestStream();
var requestStreamWriter = new StreamWriter(requestStream);
requestStreamWriter.Write(urlToUse);
requestStreamWriter.Close();

var response = request.GetResponse();
var responseStream = response.GetResponseStream();
if (responseStream == null) return null;
var responseStreamReader = new StreamReader(responseStream);

var responseFromServer = responseStreamReader.ReadToEnd();

responseStreamReader.Close();
responseStream.Close();
response.Close();

但在

var response = request.GetResponse();

并说uri太长。

我无法更改服务器的最大URL长度，并且Web服务需要URL中的参数。
我还没有找到适合我的解决方案，因此对您有所帮助。

更新：
对于面临相同问题的任何人，对我有用的解决方案是将查询放入类似的字节数组中

var encoding = new UTF8Encoding();
byte[] bytes = enconding.GetBytes((queryString));

并将其写入webrequest而不是我的queryString

var stream = request.GetRequestStream();
stream.Write(bytes, 0, bytes.Length);

Answer 1

您可以将数据放在请求的主体中，如下所示：

using (var client = new HttpClient())
{
    client.BaseAddress = new Uri("http://<url>/webservice.php");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    var jsonContent = JsonConvert.SerializeObject(new YourObject
    {
        // Pseudo code... Replace <...> with your values etc
        Operation = <YourOperation>,
        ElementType = <YourElementType>,
        Element = <YourElement>,
        // etc...
    });

    HttpResponseMessage response;
    using (HttpContent httpContent = new StringContent(jsonContent, Encoding.UTF8, "application/json"))
    {
        response = await client.PostAsync("youroperation/", httpContent);
    }

    // Do something with response if you want
}

这是基于JSON的，但是可以是您想要传递的任何内容...这是一个简单的示例，希望可以使您对如何进行操作有所了解。

Answer 2

您需要在问号处分割urlToUse：

像这样的东西（未经测试）

string[] parts = urlToUse.ToString().Split(new char[]{'?'}, 2);
string url = parts[0];
string data = parts[1];
var request = WebRequest.Create(url);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;

var requestStream = request.GetRequestStream();
var requestStreamWriter = new StreamWriter(requestStream);
requestStreamWriter.Write(data);
requestStreamWriter.Close();

var response = request.GetResponse();
var responseStream = response.GetResponseStream();
if (responseStream == null) return null;
var responseStreamReader = new StreamReader(responseStream);

var responseFromServer = responseStreamReader.ReadToEnd();

responseStreamReader.Close();
responseStream.Close();
response.Close();

祝您一切顺利。