Nuget package for bitly to shorten the links

问题

I need to shorten my links using bitly in C#. Is there any nuget package for this? Can some one provide me code for that so that I can use that.

回答1:

Check out https://www.nuget.org/packages/BitlyAPI/ or just make your own call to the bit.ly api. The api is very easy to use and work with.

public string Shorten(string longUrl, string login, string apikey)
{
    var url = string.Format("http://api.bit.ly/shorten?format=json&version=2.0.1&longUrl={0}&login={1}&apiKey={2}", HttpUtility.UrlEncode(longUrl), login, apikey);

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    try
    {
        WebResponse response = request.GetResponse();
        using (Stream responseStream = response.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
            JavaScriptSerializer js = new JavaScriptSerializer();
            dynamic jsonResponse = js.Deserialize<dynamic>(reader.ReadToEnd());
            string s = jsonResponse["results"][longUrl]["shortUrl"];
            return s;
        }
    }
    catch (WebException ex)
    {
        WebResponse errorResponse = ex.Response;
        using (Stream responseStream = errorResponse.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
            String errorText = reader.ReadToEnd();
            // log errorText
        }
        throw;
    }
}

You can get your login and apikey from bit.ly by going to this link https://bitly.com/a/your_api_key

回答2:

I had problems with the Nuget package Bitly.Net so I implemented @devfunkd's solution above. However I still had the same problems on Azure see this related link so I had to develop a slightly different solution.

My solution uses a fixed OAuth Token for authentication, as suggested by bit.ly support. It worked on Azure and has the advantage that it is not depreciated like the older 'login'/'apiKey'. In case this is useful to someone here is the code, based on @devfunkd but updated to:

Use the fixed OAuth token for validation.
Use the bit.ly's V3 API, which has a nicer json format.
It uses Json.NET json deserialiser, which I mainly use.
I made it async as most of the rest of my system is async.

Note that in the code the field _bitlyToken should contain a token created by going to this page. The _logger variable holds some sort of logger so that errors are not lost.

public async Task<string> ShortenAsync(string longUrl)
{
    //with thanks to @devfunkd - see https://stackoverflow.com/questions/31487902/nuget-package-for-bitly-to-shorten-the-links

    var url = string.Format("https://api-ssl.bitly.com/v3/shorten?access_token={0}&longUrl={1}",
            _bitlyToken, HttpUtility.UrlEncode(longUrl));

    var request = (HttpWebRequest) WebRequest.Create(url);
    try
    {
        var response = await request.GetResponseAsync();
        using (var responseStream = response.GetResponseStream())
        {
            var reader = new StreamReader(responseStream, Encoding.UTF8);
            var jsonResponse = JObject.Parse(await reader.ReadToEndAsync());
            var statusCode = jsonResponse["status_code"].Value<int>();
            if (statusCode == (int) HttpStatusCode.OK)
                return jsonResponse["data"]["url"].Value<string>();

            //else some sort of problem
            _logger.ErrorFormat("Bitly request returned error code {0}, status text '{1}' on longUrl = {2}",
                statusCode, jsonResponse["status_txt"].Value<string>(), longUrl);
            //What to do if it goes wrong? I return the original long url
            return longUrl;
        }
    }
    catch (WebException ex)
    {
        var errorResponse = ex.Response;
        using (var responseStream = errorResponse.GetResponseStream())
        {
            var reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
            var errorText = reader.ReadToEnd();
            // log errorText
            _logger.ErrorFormat("Bitly access threw an exception {0} on url {1}. Content = {2}", ex.Message, url, errorText);
        }
        //What to do if it goes wrong? I return the original long url
        return longUrl;
    }
}

I hope that helps someone.

来源：https://stackoverflow.com/questions/31487902/nuget-package-for-bitly-to-shorten-the-links

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.net

bit.ly