public async Task <string> GetWxQrCodeAsync(string appId, string secret, string scene, string path, int width = 430)
{
var key = KeyForOther($"File:Qrcode:{path}_{scene}_{width}");
var fileUrl = await Database.StringGetAsync(key);
if (!fileUrl.IsNull)
{
return(fileUrl.ToString());
}
var token = await GetWxAccessTokenAsync(appId, secret);
var result = await WeixinHelper.CreateQRCodeAsync(token, scene, path, width);
if (result.Code > 0)
{
throw new Exception($"小程序二维码请求错误，{result.Message}");
}
var filename = Guid.NewGuid().ToString().ToLower() + ".jpg";
var dir = Path.Combine(Environment.CurrentDirectory, "wwwroot", "qrcode");
Directory.CreateDirectory(dir);
var filepath = Path.Combine(Environment.CurrentDirectory, "wwwroot", "qrcode", filename);
using (var file = new FileStream(filepath, FileMode.Create, FileAccess.Write))
{
file.Write(result.Result, 0, result.Result.Length);
}
var url = $"{AppSetting.Setting.FileDomain}/qrcode/{filename}";
await Database.StringSetAsync(key, url);
return(url);
}