如何测试附加文件的ASP NET ashx处理程序

Question

I have an c# ashx handler that detects files attached. It works fine.

However, I am relying on third party company to write software to send files to handler (long story). I need to test that my handler works, time difference between us and 3rd party company is becoming a nightmare.

The scenario is 3rd party software sends files every 30 seconds to handler and I need to test this works and without sounding stupid I thought I ask stackoverflow :)

I just want to test my ashx handler using test unit or whatever but no idea where to start. Typing in "handler.ashx?filename=12345.csv" is helpful but no actual file attached!

Any suggestions would be great.

Answer 1

From what I understand, you have an ashx handler that you can upload files to and you want to test it.

I have attached a sample test that assumes an ashx handler that uses a POST request for file attachments.

[TestMethod]
public void TestCallUploadHandler()
{
    const string FILE_PATH = "C:\\foo.txt";
    const string FILE_NAME = "foo.txt";
    string UPLOADER_URI =
        string.Format("http://www.foobar.com/handler.ashx?filename={0}", FILE_NAME);

    using (var stream = File.OpenRead(FILE_PATH))
    {
        var httpRequest = WebRequest.Create(UPLOADER_URI) as HttpWebRequest;
        httpRequest.Method = "POST";
        stream.Seek(0, SeekOrigin.Begin);
        stream.CopyTo(httpRequest.GetRequestStream());

        var httpResponse = httpRequest.GetResponse();
        StreamReader reader = new StreamReader(httpResponse.GetResponseStream());
        var responseString = reader.ReadToEnd();

        //Check the responsestring and see if all is ok
    }
}

Basically what you are doing is creating a WebRequest for POST and attaching the filestream to its request and filename to its query string.

Answer 2

To answer my question and many thanks to @parapura:

[TestMethod]
public void TestCallUploadHandler()
{
    const string FILE_PATH = "C:\\foo.txt";
    const string FILE_NAME = "foo.txt";
    string UPLOADER_URI = string.Format("http://www.foobar.com/handler.ashx?filename={0}", FILE_NAME);

    using (var stream = File.OpenRead(FILE_PATH))
    {
        var httpRequest = WebRequest.Create(UPLOADER_URI) as HttpWebRequest;
        httpRequest.Method = "POST";
        NetworkCredential networkCredential = new NetworkCredential("username", "pwd"); 
        httpRequest.Credentials = networkCredential;
        stream.Seek(0, SeekOrigin.Begin);
        stream.CopyTo(httpRequest.GetRequestStream());

        byte[] authBytes = Encoding.UTF8.GetBytes("username:pwd".ToCharArray());
        httpRequest.Headers["Authorization"] = "Basic " + Convert.ToBase64String(authBytes);

        var httpResponse = httpRequest.GetResponse();
        StreamReader reader = new StreamReader(httpResponse.GetResponseStream());
        var responseString = reader.ReadToEnd();

        //Check the responsestring and see if all is ok
    }
}