Post Json Data as Query String of a webrequest

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In my scenario my API handles the json reading it as

if (context.Request.Files.Count > 0)
{
jsonData = context.Request.Params["key"];
}

from my application how can i send a web request to this api without json as query string parameter. Sine Json is lengthy and i know query string is limited.

For android an ios this api works fine.

i have tried to add it to the header. but in vain.

how can i add it so that "jsonData = context.Request.Params["key"]; " will get my json.
my request format is here.

C#

urlS="http://abc.ashx?Key="+jsonRequestS;
string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
var webRequest1 = (HttpWebRequest)WebRequest.Create(urlS);
webRequest1.Method = "POST";
webRequest1.KeepAlive = false;
webRequest1.ContentType =string.Format("multipart/form-data; boundary={0}", boundary);//
Stream postDataStream1 = handler.GetPostStream(boundary,jsonRequestS);               // Writes boundary and files to memory stream.

webRequest1.ContentLength = postDataStream1.Length;
Stream reqStream1 = webRequest1.GetRequestStream();

postDataStream1.Position = 0;

var bufferBytes = new byte[postDataStream1.Length];
postDataStream1.Read(bufferBytes, 0, bufferBytes.Length);
reqStream1.Write(bufferBytes, 0, bufferBytes.Length);

postDataStream1.Close();
reqStream1.Close();

var sReader = new StreamReader(webRequest1.GetResponse().GetResponseStream());//here Am getting the error.
string resultS = sReader.ReadToEnd();

Thanks in advance.

Posted 6-Mar-13 21:05pm

anish.karunakaran

Updated 7-Mar-13 17:20pm

v2

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Prasad Khandekar · Accepted Answer · 2013-03-07T18:32:00

Hello Ashish,

Looking at your client code snippet first thing you need to do is to change very first line to read as follows

C#

urlS="http://abc.ashx";

The next thing is to change the line which creates postDataStream1. On this line you are passing boundry & jsonRequestS to GetPostStream. Assuming that jsonRequestS is a string all you need to do is change that line to

C#

handler.GetPostStream(boundary, "key=" + jsonRequestS);

Remember POST data is sent in "key=value" format. Since you are transferring any file(s), ContentTypeas "multipart/form-data; boundary=-------------------------334234ds" is unnecessary. ContentType as "application/x-www-form-urlencoded" should be sufficient.

regards,

anish.karunakaran · Accepted Answer · 2013-03-07T19:22:00

Thanks for ur Reply. I found a way to solve this.

Write the Json to the request stream with the header as

postDataStream.Write(boundarybytes, 0, boundarybytes.Length);
string header = string.Format("Content-Disposition: form-data; name=\"Key\"\r\n\r\n");
headerbytes = Encoding.Default.GetBytes(header);
postDataStream.Write(headerbytes, 0, headerbytes.Length);
headerbytes = Encoding.Default.GetBytes(jsonRequestS);//writing json request.
postDataStream.Write(headerbytes, 0, headerbytes.Length);
and at the server side it will be fine read in the statement

jsonData = context.Request.Params["key"];

Post Json Data as Query String of a webrequest

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Post Json Data as Query String of a webrequest

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