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分享post请求获取数据
string Url = "http://www.szbjh.com:8114/Enjoy/Service/";
string st = DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss.fff");
st = st.Replace(" ", "T") + "Z";
Dictionary<string, string> PostPara = new Dictionary<string, string>
{
{"UniqueKey","EnjoySCM40通用"},
{"MethodName","GetPartnerMenu"},
{"UserNo",""},
{"ClientTime",st},
{"ObjectData","003693"},
{"Tag",null},
{"Token","token-null"}
};
//这个Cookies我上面的代码登录确保已经获取到了
string json = HttpResponse.PostHttpResponseJson(Url, null, PostPara, Cookies);
public static string PostHttpResponseJson(string url, IWebProxy webProxy, Dictionary<string, string> postDict, CookieCollection Cookie)
{
string json = string.Empty;
Encoding encoding = Encoding.UTF8;
HttpWebResponse Response = CreatePostHttpResponse(new HttpPostParametersModel()
{
Url = url,
DictParameters = postDict,
WebProxy = webProxy,
RequestEncoding = encoding,
Cookies = Cookie
});
json = GetStream(Response, encoding);
return json;
}
/// <summary>
/// 创建POST方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="requestEncoding">发送HTTP请求时所用的编码</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static HttpWebResponse CreatePostHttpResponse(HttpPostParametersModel postParametersModel)
{
if (string.IsNullOrEmpty(postParametersModel.Url))
{
throw new ArgumentNullException("postParametersModel.Url");
}
if (postParametersModel.RequestEncoding == null)
{
throw new ArgumentNullException("postParametersModel.RequestEncoding");
}
HttpWebRequest request = null;
//如果是发送HTTPS请求
if (postParametersModel.Url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(postParametersModel.Url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version11;
}
else
{
request = WebRequest.Create(postParametersModel.Url) as HttpWebRequest;
}
if (postParametersModel.WebProxy != null)
{
request.Proxy = postParametersModel.WebProxy;
}
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
if (!string.IsNullOrEmpty(postParametersModel.UserAgent))
{
request.UserAgent = postParametersModel.UserAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
}
if (postParametersModel.Timeout.HasValue)
{
request.Timeout = postParametersModel.Timeout.Value;
}
if (postParametersModel.Cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(postParametersModel.Cookies);
}
//如果需要POST数据
if (!(postParametersModel.DictParameters == null || postParametersModel.DictParameters.Count == 0))
{
StringBuilder buffer = new StringBuilder();
int i = 0;
foreach (string key in postParametersModel.DictParameters.Keys)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", key, postParametersModel.DictParameters[key]);
}
else
{
buffer.AppendFormat("{0}={1}", key, postParametersModel.DictParameters[key]);
}
i++;
}
byte[] data = postParametersModel.RequestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
}
return request.GetResponse() as HttpWebResponse;
}
/// <summary>
/// 将response转换成文本
/// </summary>
/// <param name="response"></param>
/// <param name="encoding"></param>
/// <returns></returns>
private static string GetStream(HttpWebResponse response, Encoding encoding)
{
try
{
if (response.StatusCode == HttpStatusCode.OK)
{
switch (response.ContentEncoding.ToLower())
{
case "gzip":
{
string result = Decompress(response.GetResponseStream(), encoding);
response.Close();
return result;
}
default:
{
Byte[] buffer = new Byte[response.ContentLength];
using (StreamReader sr = new StreamReader(response.GetResponseStream(), encoding))
{
string result = sr.ReadToEnd();
sr.Close();
sr.Dispose();
response.Close();
return result;
}
}
}
}
else
{
response.Close();
}
}
catch (Exception e)
{
throw e;
}
return "";
}
private static readonly string DefaultUserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0";
/// <summary>
/// GET请求参数模型
/// </summary>
public class HttpGetParametersModel
{
/// <summary>
/// 请求的URL(GET方式就附加参数)
/// </summary>
public string Url { get; set; }
/// <summary>
/// 超时时间
/// </summary>
public int? Timeout { get; set; }
/// <summary>
///浏览器代理类型
/// </summary>
public string UserAgent { get; set; }
/// <summary>
/// Web请求代理
/// </summary>
public IWebProxy WebProxy { get; set; }
/// <summary>
/// Cookies列表
/// </summary>
public CookieCollection Cookies { get; set; }
}
/// <summary>
/// POST请求参数模型
/// </summary>
public class HttpPostParametersModel : HttpGetParametersModel
{
/// <summary>
/// POST参数字典
/// </summary>
public IDictionary<string, string> DictParameters { get; set; }
/// <summary>
/// 发送HTTP请求时所用的编码
/// </summary>
public Encoding RequestEncoding { get; set; }
}
{
"ObjectData": null,
"UniqueKey": null,
"MethodName": null,
"SourceMethodName": null,
"Tag": null,
"UserState": null,
"Exception": {
"HasException": true,
"ExceptionType": 0,
"Code": "-1",
"Message": "Unexpected character encountered while parsing value: U. Path '', line 0, position 0.",
"StackTrace": " 在 Newtonsoft.Json.JsonTextReader.ParseValue()\r\n 在 Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType(JsonReader reader, JsonContract contract, Boolean hasConverter)\r\n 在 Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)\r\n 在 Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)\r\n 在 Enjoy.Common.JsonHelper.DeserializeObject[T](String JSON)\r\n 在 Enjoy.EnjoyRun.Run(String request, String& response)\r\n 在 Enjoy.EnjoyRun.Run(String request)"
},
"HasException": true
}
我想请求出来的就是最后一张图片的json数据，但是好像中间出了点问题。请求出来数据的格式好像是对的，但是就是"ObjectData": 里面没有数据，而且下面还报错了。
...全文
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听雨停了 2018-07-20
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问题已经解决，确实如猴哥所说，传过去的参数不是json格式导致的。感谢楼上各位的意见。
情似生活 2018-07-20
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后台指定返回的数据格式不对，导致前台的数据显示异常。你检查一下返回的数据格式有没设置对
姓小名白丶 2018-07-20
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我有个想法。。。。。如果和1楼说的 json反序列化的时候出错的时候 那就后台图片返回到前台的时候 加上[jsonignore]试试 但是得保证返回的数据你可以用
二月十六 2018-07-20
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传过去的参数用json格式的试试
吉普赛的歌 2018-07-20
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你这代码比较复杂， 这方面研究也不多， 不好意思。
这个插件用过一下， 比较简洁， 你试下能不能用上： https://github.com/restsharp/RestSharp
这个插件用过一下， 比较简洁， 你试下能不能用上： https://github.com/restsharp/RestSharp
正怒月神 2018-07-20
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看错误，应该是json反序列化时出问题了。
