/// <summary>
/// Gets the <c>ReCaptchaV2Request</c> instance.
/// </summary>
/// <param name="form">Form values collection.</param>
/// <param name="serverVariables">Server variables collection.</param>
/// <returns>Returns the <c>ReCaptchaV2Request</c> instance.</returns>
public ReCaptchaV2Request GetReCaptchaV2Request(NameValueCollection form, NameValueCollection serverVariables = null)
{
if (form == null)
{
throw new ArgumentNullException("form");
}
if (!form.AllKeys.Contains("g-recaptcha-response"))
{
throw new KeyNotFoundException();
}
var response = form["g-recaptcha-response"];
if (String.IsNullOrWhiteSpace(response))
{
throw new InvalidOperationException("Response value not found");
}
string remoteAddr = null;
if (serverVariables != null && serverVariables.AllKeys.Contains("REMOTE_ADDR"))
{
remoteAddr = serverVariables["REMOTE_ADDR"];
}
var request = new ReCaptchaV2Request()
{
Secret = this._settings.SecretKey,
Response = response,
RemoteIp = remoteAddr,
};
return(request);
}
/// <summary>
/// Verifies the request asynchronously.
/// </summary>
/// <param name="request"><c>ReCaptchaV2Request</c> object.</param>
/// <returns>Returns <c>ReCaptchaV2Response</c> object.</returns>
public async Task <ReCaptchaV2Response> SiteVerifyAsync(ReCaptchaV2Request request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
var responseBody = await this.GetResponseBodyAsync(request);
var response = JsonConvert.DeserializeObject <ReCaptchaV2Response>(responseBody);
return(response);
}
/// <summary>
/// Gets the request body.
/// </summary>
/// <param name="request"><c>ReCaptchaV2Request</c> object.</param>
/// <returns>Returns the request body.</returns>
public string GetRequestBody(ReCaptchaV2Request request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
var requestBody = request.GetType()
.GetProperties(BindingFlags.Instance | BindingFlags.Public)
.ToDictionary(p => p.Name.ToLower(), p => Convert.ToString(p.GetValue(request, null)))
.Flatten();
return(requestBody);
}
/// <summary>
/// Gets the response body as a JSON format asynchronously.
/// </summary>
/// <param name="request"><c>ReCaptchaV2Request</c> object.</param>
/// <returns>Returns the response body as a JSON format.</returns>
public virtual async Task <string> GetResponseBodyAsync(ReCaptchaV2Request request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
string responseBody;
using (var client = new HttpClient())
{
var requestBody = this.GetRequestBody(request);
var content = new StringContent(requestBody, Encoding.UTF8, "application/x-www-form-urlencoded");
var httpResponse = await client.PostAsync(this._settings.RequestUrl, content);
responseBody = await httpResponse.Content.ReadAsStringAsync();
}
return(responseBody);
}
