本文介绍了将字节数组发布到服务器的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用POST向服务器发送字节数组和字符串,但未成功完成,我在做正确的事吗?
I am using POST to sent a byte array and a string to the server but is not sucessfull, am I doing the right thing?
memStream.Write(image,0,signature.Length);,图像是一个字节数组.
memStream.Write(image, 0, signature.Length);, image is a byte array.
代码:
Uri wsHost = new Uri(WebServices.RESTEnpointAddress());
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(wsHost);
request.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate");
// Boundary
var boundary = "------------------------" + DateTime.Now.Ticks.ToString("x");
// Set the request type
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.Method = "POST";
request.KeepAlive = true;
//request.ContentLength = docByte.Length;
// Create a new memory stream
Stream memStream = new MemoryStream();
// Boundary in bytes
byte[] boundaryByte = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
// body
memStream.Write(boundaryByte, 0, boundaryByte.Length);
string ImgBody = string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n", "signImg", "tmpSignImgName");
ImgBody += "Content-Type: application/octet-stream\r\n\r\n";
byte[] ImgBodyByte = Encoding.ASCII.GetBytes(ImgBody);
memStream.Write(ImgBodyByte, 0, ImgBodyByte.Length);
memStream.Write(image, 0, signature.Length); // image ss a byte array
memStream.Write(boundaryByte, 0, boundaryByte.Length);
string signLocLatBody = string.Format("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n", "signloclat");
signLocLatBody += latitude;
byte[] signLocLatBodyByte = Encoding.ASCII.GetBytes(signLocLatBody);
memStream.Write(signLocLatBodyByte, 0, signLocLatBodyByte.Length);
memStream.Write(boundaryByte, 0, boundaryByte.Length);
Stream stream = request.GetRequestStream();
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
stream.Write(tempBuffer, 0, tempBuffer.Length);
stream.Close();
推荐答案
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
byte[] boundaryBytes = System.Text.Encoding.ASCII.GetBytes("--" + boundary + "\r\n");
HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.Create(MyUrl);
webRequest.ContentType = "multipart/form-data; boundary=" + boundary;
webRequest.Method = "POST";
using (Stream requestStream = webRequest.GetRequestStream())
{
// write boundary bytes
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
// write header bytes.
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
string header = string.Format(headerTemplate, "MyName", "MyFileName", "content type");
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
requestStream.Write(headerbytes, 0, headerbytes.Length);
using (MemoryStream memoryStream = new MemoryStream(imageBytes))
{
byte[] buffer = new byte[4096];
int bytesRead = 0;
while ((bytesRead = memoryStream.Read(buffer, 0, buffer.Length)) != 0)
{
requestStream.Write(buffer, 0, bytesRead);
}
}
// write trailing boundary bytes.
byte[] trailerBytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
requestStream.Write(trailerBytes, 0, trailerBytes.Length);
}
using (HttpWebResponse wr = (HttpWebResponse)webRequest.GetResponse())
{
using (Stream response = wr.GetResponseStream())
{
// handle response stream.
}
}
这将读取MemoryStream并将数据写入具有4096字节缓冲区的requestStream中.应该将其包装在try-catch中,以便它可以捕获异常并处理它们.
This reads a MemoryStream and writes the data to the requestStream, with a 4096 byte buffer. This should be wrapped in a try-catch so it can trap exceptions and handle them.
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