public Task <IDCardBackOCRResult> RecognizeIDCardBack(Stream idCardBackImageData)
{
var result = new IDCardBackOCRResult
{
Issuer = "Issuer",
IssueDate = new DateTime(2008, 2, 21),
ExpiresDate = new DateTime(2018, 2, 21),
};
return(Task.FromResult(result));
}
/// <summary>
/// 识别身份证背面（国徽面）。
/// </summary>
/// <param name="idCardBackImageData"></param>
/// <returns></returns>
public async Task <IDCardBackOCRResult> RecognizeIDCardBack(Stream idCardBackImageData)
{
string imgBase64;
using (var ms = new MemoryStream())
{
idCardBackImageData.CopyTo(ms);
imgBase64 = Convert.ToBase64String(ms.ToArray());
}
var requestData = new
{
image = imgBase64,
configure = new
{
side = "back",
},
};
var request = WebRequest.Create(svcUrl);
request.Method = "POST";
request.Headers.Add("Authorization", "APPCODE " + appCode);
request.ContentType = "application/json; charset=UTF-8";
var requestStream = await request.GetRequestStreamAsync();
var writer = new StreamWriter(requestStream);
var jsonWriter = new JsonTextWriter(writer);
this.serializer.Serialize(jsonWriter, requestData);
jsonWriter.Flush();
var response = await request.GetResponseAsync();
var responseStream = response.GetResponseStream();
var result = this.serializer.Deserialize <dynamic>(new JsonTextReader(new StreamReader(responseStream)));
if (!(bool)result.success)
{
throw new IDCardRecognizeException("Can not recognize");
}
var returnResult = new IDCardBackOCRResult
{
Issuer = (string)result.issue,
IssueDate = this.parseDate((string)result.start_date),
ExpiresDate = this.parseDate((string)result.end_date),
};
return(returnResult);
}
