carlyrae February 2016

Echo Nest API: convert curl command for checking rate limit to c#

I'm trying to convert this curl command to c#

curl -i 'http://developer.echonest.com/api/v4/artist/profile?api_key=[API KEY]&name=weezer'

This returns a response header with content like so:

HTTP/1.1 200 OK
Content-Length: 135
X-RateLimit-Limit: 120
X-RateLimit-Remaining: 62
X-RateLimit-Used: 58

I tried this code but when I run it, it gets an exception: "HTTP Error 405 Method not allowed".

string baseurl = "http://developer.echonest.com/api/v4/artist/profile?api_key=[API KEY]&name=weezer";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(baseurl);
request.Method = "POST";
request.Accept = "application/json";
request.UserAgent = "curl/7.37.0";
request.ContentType = "application/x-www-form-urlencoded";

using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
    string data = "browser=Win7x64-C1|Chrome32|1024x768&url=http://www.google.com";
    streamWriter.Write(data);
}

var response = request.GetResponse();
string text;

using (var sr = new StreamReader(response.GetResponseStream()))
{
    text = sr.ReadToEnd();
    Console.WriteLine(text);
}

Any help will be appreciated.

Answers


David W Gray February 2016

As well as the changes Daniel suggested, I would remove the UserAgent. After that, it looks pretty much like the C# I'm using successfully. Here's a somewhat shortened version of that:

    string baseurl = "http://developer.echonest.com/api/v4/artist/profile?api_key=[API KEY]&name=weezer";
    var req = (HttpWebRequest) WebRequest.Create(baseurl);
    req.Method = WebRequestMethods.Http.Get;
    req.Accept = "application/json";

    using (var response = (HttpWebResponse) req.GetResponse())
    {
        if (response.StatusCode == HttpStatusCode.OK)
        {
            var stream = response.GetResponseStream();
            if (stream != null)
            {
                using (var sr = new StreamReader(stream))
                {
                    responseString = sr.ReadToEnd();
                }

                var remaining = GetRateInfo(response.Headers, "X-RateLimit-Remaining");
                var used = GetRateInfo(response.Headers, "X-RateLimit-Used");
                var limit = GetRateInfo(response.Headers, "X-RateLimit-Limit");
                Trace.WriteLine($"Excedeed EchoNest Limits: remaining {remaining} - used {used} - limit {limit}");
            }
        }
        else
        {
            // Error handling
        }

// And the header parsing code:

    private static int GetRateInfo(WebHeaderCollection headers, string type)
    {
        var s = headers.Get(type);
        if (s == null)
            return -1;

        int info;
        return int.TryParse(s, out info) ? info : -1;
    }

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Asked in February 2016
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