/// <summary>
/// 通过ServerID（mediaid）从微信服务器上下载图片，保存到本地，并返回文件名
/// </summary>
/// <param name="mediaid"></param>
/// <returns></returns>
public async Task <string> Get(string mediaid)
{
var mongo = new MongoDBHelper <WeixinImgFileModels>("weixinImgFile");
//查询mongo中是否存储了mediaid对应的照片文件
var doc = await mongo.SelectOneAsync(x => x.MediaId == mediaid);
if (doc != null)
{
return(doc.FileName);
}
//如果文件没有下载过，则下载
//http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID
var queryString = HttpUtility.ParseQueryString(string.Empty);
queryString["access_token"] = await Get();
queryString["media_id"] = mediaid;
var uri = "http://file.api.weixin.qq.com/cgi-bin/media/get?" + queryString;
HttpResponseMessage response;
response = await client.GetAsync(uri);
var msg = await response.Content.ReadAsStreamAsync();
var fileName = response.Content.Headers.ContentDisposition.FileName.Replace("\"", "");
var helper = new ProjecToxfordClientHelper();
var content = await FileHelper.ReadAsync(msg);
FileHelper.SaveFile(content, fileName);
await mongo.InsertAsync(new WeixinImgFileModels()
{
FileName = fileName,
MediaId = mediaid
});
return(fileName);
}
public async Task <HttpResponseMessage> Verify(string faceId1, string faceId2)
{
var key = "verify";
var mongo = new MongoDBHelper <VerifyModels>("faceverify");
//先检查数据库中是否有上次比较的结果
var doc = await mongo.SelectOneAsync(x =>
(x.FaceID1 == faceId1 && x.FaceID2 == faceId2)
);
if (doc != null)
{
var mongoResult = new
{
faceID1 = doc.FaceID1,
faceID2 = doc.FaceID2,
confidence = doc.Confidence,
isIdentical = doc.IsIdentical
}.ToJson();
//var apiResult = doc.ToJson<VerifyModels>();
return(client.CreateHttpResponseMessage(
Request,
new Models.ProjecToxfordResponseModels(mongoResult, HttpStatusCode.OK)));
}
//如果之前的结果没有查询到，则提交牛津查询
var result = await client.PostAsync(
key,
new
{
faceId1 = faceId1,
faceId2 = faceId2
}
);
if (result.StatusCode == HttpStatusCode.OK)
{
var tmp = Newtonsoft.Json.Linq.JObject.Parse(result.Message);
//如果为了加速查询的话，我们采用两次写入
await mongo.InsertAsync(new VerifyModels()
{
FaceID1 = faceId1,
FaceID2 = faceId2,
Confidence = (double)tmp["confidence"],
IsIdentical = (bool)tmp["isIdentical"]
});
await mongo.InsertAsync(new VerifyModels()
{
FaceID1 = faceId2,
FaceID2 = faceId1,
Confidence = (double)tmp["confidence"],
IsIdentical = (bool)tmp["isIdentical"]
});
var resultJson = new
{
faceID1 = faceId1,
faceID2 = faceId2,
confidence = (double)tmp["confidence"],
isIdentical = (bool)tmp["isIdentical"]
}.ToJson();
return(client.CreateHttpResponseMessage(
Request,
new Models.ProjecToxfordResponseModels(resultJson, HttpStatusCode.OK)));
}
return(client.CreateHttpResponseMessage(Request, result));
}