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C# HTTP POST and GET

By Dag, on December 30th, 2016

Dabbling in C# a little bit, and wanted to note some partial code (albeit legacy) for post/get against web. For e.g. json and xml APIs.

string postString = "";

// Log into local PMS.
var webcall = (HttpWebRequest)WebRequest.Create(PMS_AUTH_URL);
postString += "username=" + PMS_USERNAME;
postString += "&password=" + PMS_PASSWORD;
var postStringEnc = System.Text.Encoding.UTF8.GetBytes(postString);
			
webcall.Method = "POST";
webcall.ContentType = "application/x-www-form-urlencoded";
webcall.ContentLength = postStringEnc.Length;
webcall.Headers.Add("Content-Length","0");
webcall.Headers.Add("X-Plex-Client-Identifier","PulsePlexWatch");
using (var stream = webcall.GetRequestStream())
{
	stream.Write(postStringEnc, 0, postStringEnc.Length);
}

var callres = (HttpWebResponse)webcall.GetResponse();
var calltxt = new System.IO.StreamReader(callres.GetResponseStream()).ReadToEnd();

// Check login success.
XmlDocument pmsXml = new XmlDocument();
pmsXml.LoadXml(calltxt);
XmlNode pmsXmlNode = pmsXml.SelectSingleNode("user/authentication-token");
if (pmsXmlNode == null)
	return "PMS Login to retrieve token failed.";
else
	// Do something with pmsXmlNode.InnerText.Trim();