public async Task <Response <IList <EnumResponse> > > GetSignatureTypeAsync()
{
var response = new Response <IList <EnumResponse> >();
var result = Extension.EnumToList <SignatureEnum>();
response.Result = result;
return(await Task.FromResult(response));
}
public async Task <Response <IList <EnumResponse> > > GetHotNewsSourceAsync()
{
var response = new Response <IList <EnumResponse> >();
var result = Extension.EnumToList <HotNewsSource>();
response.Result = result;
return(await Task.FromResult(response));
}
public async Task <Response <string> > GenerateSignatureAsync(string name, int id)
{
var response = new Response <string>();
if (name.Length > 4)
{
response.Msg = "名字只支持1-4个字符";
return(response);
}
var type = Extension.EnumToList <SignatureEnum>().FirstOrDefault(x => x.Value.Equals(id))?.Description;
if (string.IsNullOrEmpty(type))
{
response.Msg = "不存在的签名类型";
return(response);
}
var signatureLog = await _context.SignatureLogs.FirstOrDefaultAsync(x => x.Name.Equals(name) && x.Type.Equals(type));
if (null != signatureLog)
{
response.Result = signatureLog.Url;
return(response);
}
var ip = HttpContext.Request.Headers["X-Forwarded-For"].FirstOrDefault();
if (string.IsNullOrEmpty(ip))
{
ip = Request.HttpContext.Connection.RemoteIpAddress.ToString();
}
var url = $"{(name + id).ToMd5()}.png";
#region 生成签名
var signatureUrl = AppSettings.Signature.Urls.OrderBy(x => Guid.NewGuid()).Select(x => new
{
Url = x.Key,
Parameter = string.Format(x.Value, name, id)
}).FirstOrDefault();
var content = new StringContent(signatureUrl.Parameter);
content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
using var client = _httpClient.CreateClient();
client.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0");
var httpResponse = await client.PostAsync(signatureUrl.Url, content);
var result = await httpResponse.Content.ReadAsStringAsync();
var regex = new Regex(@"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?<imgUrl>[^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>", RegexOptions.IgnoreCase);
var imgUrl = regex.Match(result).Groups["imgUrl"].Value;
// 生成签名路径
var signaturePath = Path.Combine(AppSettings.Signature.Path, url);
// 下载签名图片至本地
await DownloadImg(client, signaturePath, imgUrl);
// 添加水印并且保存图片
await AddWatermarkSaveItAsync(signaturePath);
#endregion
var entity = new SignatureLog
{
Name = name,
Type = type,
Url = url,
Ip = ip,
Date = DateTime.Now
};
await _context.SignatureLogs.AddAsync(entity);
await _context.SaveChangesAsync();
response.Result = url;
return(response);
}