Whenever I try a "POST" and attempt to get a response, I get a "401 unauthorized access exception". The application I am trying to develop is automated Texts to remind me of certain events using the TextNow website.
I have looked around the internet and found that I should use NetworkCredentials to allow me to grab a response, but to no avail. I read around somewhere that because of how HTTP interaction in C# works, that it can't recognize a JSON 401 and retry with an authenticated header. How do I fix this?
namespace HTTPWebTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void snd_Click(object sender, EventArgs e)
{
string pnum = number.Text;
string msg = text.Text;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(new Uri("https://www.textnow.com/api/users/[redacted username]/messages"));
WebResponse response = null;
NetworkCredential netCredential =
new NetworkCredential("[redacted username]", "[redacted password]");
req.Credentials = netCredential;
req.PreAuthenticate = true;
req.Method = "GET";
response = (HttpWebResponse)req.GetResponse(); //error occurs here <<<<<<<<<<<
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";
req.Referer = "https://www.textnow.com/api/users/[redacted username]/messages";
req.AllowAutoRedirect = true;
req.KeepAlive = true;
req.ContentType = "application/json";
StringBuilder postData = new StringBuilder();
postData.Append("%7B%22contact_value%22%3A%22" + pnum + "%22%2C");
postData.Append("%22contact_type%22%3A2%2C");
postData.Append("%22message%22%3A%22" + msg + "%22%2C");
postData.Append("%22read%22%3A1%2C");
postData.Append("%22message_direction%22%3A2%2C");
postData.Append("%22message_type%22%3A1%2C");
postData.Append("%22date%22%3A%22Sat+Nov+30+2013+13%3A20%3A44+GMT-0800+(Pacific+Standard+Time)%22%2C");
postData.Append("%22from_name%22%3A%22[Redacted]%22%7D");
StreamWriter sw = new StreamWriter(req.GetRequestStream());
sw.Write(postData.ToString());
response = (HttpWebResponse)req.GetResponse();
}
}
}
I had forgotten to include several custom headers that the server required.
For Example:
Fiddler: