发送大量的POST数据

Question

So i'm making a program where you input some information. One part of the information requires alot of text, we are talking 100+ characters. What I found is when the data is to large it won't send the data at all. Here is the code I am using:

    public void HttpPost(string URI, string Parameters)
    {
        // this is what we are sending
        string post_data = Parameters;

        // this is where we will send it
        string uri = URI;

        // create a request
        HttpWebRequest request = (HttpWebRequest) WebRequest.Create(uri); 
        request.KeepAlive = false;
        request.ProtocolVersion = HttpVersion.Version10;
        request.Method = "POST";

        // turn our request string into a byte stream
        byte[] postBytes = Encoding.ASCII.GetBytes(post_data);

        // this is important - make sure you specify type this way
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = postBytes.Length;
        Stream requestStream = request.GetRequestStream();

        // now send it
        requestStream.Write(postBytes, 0, postBytes.Length);
        requestStream.Close();
    }

I am then calling that method like so:

 HttpPost(url, "data=" + accum + "&pass=HRS");

'accum' is the large amount of data that I am sending. This method works if I send a small amount of data. But then when it's large it won't send. Is there any way to send a post request to a .php page on my website that can exceed 100+ characters?

Thanks.

Answer 1

You're only calling GetRequestStream . That won't make the request - by default it will be buffered in memory, IIRC.

You need to call WebRequest.GetResponse() to actually make the request to the web server.

So change the end of your code to:

 // Using statement to auto-close, even if there's an exception
 using (Stream requestStream = request.GetRequestStream())
 {
     requestStream.Write(postBytes, 0, postBytes.Length);
 }

 // Now we're ready to send the data, and ask for a response
 using (WebResponse response = request.GetResponse())
 {
     // Do you really not want to do anything with the response?
 }

Answer 2

I'm using this way to post JSON data inside the request , I guess it's a little bit different but it may work ,

httpWebRequest = (HttpWebRequest)WebRequest.Create(RequestURL);
httpWebRequest.ContentType = "application/json";
                httpWebRequest.Accept = "application/json";
                httpWebRequest.Method = "POST";
String username = "UserName";
String password = "passw0rd";
String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + password));
httpWebRequest.Headers.Add("Authorization", "Basic " + encoded);
 using (StreamWriter sw = new StreamWriter(httpWebRequest.GetRequestStream()))
                {
                    string json = "{" +
                                    "\"user\":[ \"" + user + "\"] " +
                                    "}";
                    sw.Write(json);
                    sw.Flush();
                    sw.Close();
                }
using (HttpWebResponse httpResponse = (HttpWebResponse)httpWebRequest.GetResponse())
                {


                    //var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                    using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
                    {
                        var responseText = streamReader.ReadToEnd();
                        //Now you have your response.
                        //or false depending on information in the response
                    }

                    httpResponse.Close();
                }