首页手记 [工具类]模拟请求时提交大字符串

[工具类]模拟请求时提交大字符串

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写在前面

开发中也会经常用到模拟请求的东东，有时候提交的数据比较大，一般的方式就不行了，这个时候，下面的方式就会更好的解决你的问题。

方法

提交的数据比较大的时候，就会用到这个方法，当然可以对该方法进行修改一下，也可以提交文件。

/// <summary>
/// 提交大数据量 /// </summary>
/// <param name="url"></param>
/// <param name="postData"></param>
/// <returns></returns>
public static string PostBigString(string url, string postData)
{ string responseContent; var memStream = new MemoryStream(); var webRequest = (HttpWebRequest)WebRequest.Create(url); // 边界符
var boundary = "---------------" + DateTime.Now.Ticks.ToString("x"); // 边界符
var beginBoundary = Encoding.ASCII.GetBytes("--" + boundary + "\r\n"); //var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read); // 最后的结束符
var endBoundary = Encoding.ASCII.GetBytes("--" + boundary + "--\r\n"); // 设置属性
webRequest.Method = "POST";
webRequest.Timeout = 40000;
webRequest.ContentType = "multipart/form-data; boundary=" + boundary; // 写入文件
const string filePartHeader = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" + "Content-Type: application/octet-stream\r\n\r\n"; var header = string.Format(filePartHeader, "", ""); var headerbytes = Encoding.UTF8.GetBytes(header);

memStream.Write(beginBoundary, 0, beginBoundary.Length);
memStream.Write(headerbytes, 0, headerbytes.Length); var buffer = Encoding.UTF8.GetBytes(postData); // 写入字符串的Key
var stringKeyHeader = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"" + "\r\n\r\n{1}\r\n"; string formitem = string.Format(stringKeyHeader, "value", postData); byte[] formitembytes = Encoding.UTF8.GetBytes(formitem);
memStream.Write(formitembytes, 0, formitembytes.Length); // 写入最后的结束边界符
memStream.Write(endBoundary, 0, endBoundary.Length);

webRequest.ContentLength = memStream.Length; var requestStream = webRequest.GetRequestStream();

memStream.Position = 0; var tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();

requestStream.Write(tempBuffer, 0, tempBuffer.Length); //requestStream.Close(); //加入这行会报错！

var httpWebResponse = (HttpWebResponse)webRequest.GetResponse(); using (var httpStreamReader = new StreamReader(httpWebResponse.GetResponseStream(),
Encoding.GetEncoding("utf-8")))
{
responseContent = httpStreamReader.ReadToEnd();
}

httpWebResponse.Close();
webRequest.Abort(); return responseContent;
}

普通的模拟post请求的方法

/// <summary>
/// post请求 /// </summary>
/// <param name="url">请求的地址</param>
/// <param name="postdata">参数</param>
/// <returns></returns>
public static string PostString(string url, string postdata)
{ string strJson = string.Empty; try
{ byte[] buffer = Encoding.UTF8.GetBytes(postdata);
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
request.Method = "POST";
request.Accept = "application/json;charset:utf-8";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = buffer.Length; using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(buffer, 0, buffer.Length);
} using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{ using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
{
strJson = sr.ReadToEnd();
}
} return strJson;
} catch (Exception ex)
{ throw ex;
}
}

对于一般的post请求，上面的方法已经能解决了，但是对应提交的数据比较大的时候，上面的这个方法就会显得力不从心了。