public async Task <BlogResponse <string> > GenerateAsync(GenerateSignatureInput input)
{
return(await _cache.GenerateAsync(input, async() =>
{
var response = new BlogResponse <string>();
var ip = _httpContextAccessor.HttpContext.Request.Headers["X-Real-IP"].FirstOrDefault() ??
_httpContextAccessor.HttpContext.Request.Headers["X-Forwarded-For"].FirstOrDefault() ??
_httpContextAccessor.HttpContext.Connection.RemoteIpAddress.MapToIPv4().ToString();
var type = Signature.KnownTypes.Dictionary.FirstOrDefault(x => x.Value == input.TypeId).Key;
if (type.IsNullOrEmpty())
{
response.IsFailed($"The signature type not exists.");
return response;
}
var signature = await _signatures.FindAsync(x => x.Name == input.Name && x.Type == type);
if (signature is not null)
{
response.Result = signature.Url;
return response;
}
var api = _signatureOptions.Urls
.OrderBy(x => GuidGenerator.Create())
.Select(x => new { Url = x.Key, Param = string.Format(x.Value, input.Name, input.TypeId) })
.FirstOrDefault();
var content = new StringContent(api.Param);
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(api.Url, content);
var httpResult = 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(httpResult).Groups["imgUrl"].Value;
var url = $"{$"{input.Name}_{type}".ToMd5()}.png";
var signaturePath = Path.Combine(_signatureOptions.Path, url);
var imgBuffer = await client.GetByteArrayAsync(imgUrl);
await imgBuffer.DownloadAsync(signaturePath);
await _signatures.InsertAsync(new Signature
{
Name = input.Name,
Type = type,
Url = url,
Ip = ip
});
response.Result = url;
return response;
}));
/// <summary>
/// 生成个性艺术签名
/// </summary>
/// <param name="input"></param>
/// <param name="factory"></param>
/// <returns></returns>
public async Task <ServiceResult <string> > GenerateSignatureAsync(GenerateSignatureInput input, Func <Task <ServiceResult <string> > > factory)
{
return(await Cache.GetOrAddAsync(KEY_GenerateSignature.FormatWith(input.Name, input.Id), factory, CacheStrategy.ONE_HOURS));
}
/// <summary>
/// 生成个性艺术签名
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public async Task <ServiceResult <string> > GenerateSignatureAsync(GenerateSignatureInput input)
{
var result = new ServiceResult <string>();
var ip = _httpContextAccessor.HttpContext.Request.GetClientIp();
// TODO:当前ip是否在小黑屋，禁止使用
// 验签，请求是否合法
var sign = $"{input.Name}_{input.Id}_{input.Timestamp}".EncodeMd5String().ToLower();
if (input.Sign != sign)
{
result.IsFailed("验签不正确");
return(result);
}
return(await _signatureCacheService.GenerateSignatureAsync(input, async() =>
{
// 签名类型
var type = typeof(SignatureEnum).TryToList().FirstOrDefault(x => x.Value.Equals(input.Id))?.Description;
if (string.IsNullOrEmpty(type))
{
result.IsFailed("签名类型不存在");
return result;
}
// 查询是否存在此签名，存在则直接返回
var signature = await _signatureRepository.FindAsync(x => x.Name.Equals(input.Name) && x.Type.Equals(type));
if (signature.IsNotNull())
{
result.IsSuccess(signature.Url);
return result;
}
// 签名图片名称
var signaturePicName = $"{sign}.png";
// 在配置文件中随机取一条签名api
var signatureUrl = AppSettings.Signature.Urls.OrderBy(x => GuidGenerator.Create()).Select(x => new
{
Url = x.Key,
Parameter = x.Value.FormatWith(input.Name, input.Id)
}).FirstOrDefault();
// 发送请求，获取结果
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.14 Safari/537.36 Edg/83.0.478.13");
var httpResponse = await client.PostAsync(signatureUrl.Url, content);
var httpResult = await httpResponse.Content.ReadAsStringAsync();
// 正则获取api返回的签名图片
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(httpResult).Groups["imgUrl"].Value;
// 签名保存的路径
var signaturePath = Path.Combine(AppSettings.Signature.Path, signaturePicName);
// 保存图片至本地
var imgBuffer = await client.GetByteArrayAsync(imgUrl);
await imgBuffer.DownloadAsync(signaturePath);
// 添加水印
await signaturePath.AddWatermarkAndSaveItAsync();
// 保存调用记录
var entity = new Domain.Signature.Signature
{
Name = input.Name,
Type = type,
Url = signaturePicName,
Ip = ip,
CreateTime = DateTime.Now
};
await _signatureRepository.InsertAsync(entity);
result.IsSuccess(entity.Url);
return result;
}));
public async Task <ServiceResult <string> > GenerateSignatureForPostAsync([FromBody] GenerateSignatureInput input)
{
return(await _signatureService.GenerateSignatureAsync(input));
}
public async Task <BlogResponse <string> > GenerateAsync(GenerateSignatureInput input, Func <Task <BlogResponse <string> > > func) => await Cache.GetOrAddAsync(CachingConsts.CacheKeys.GenerateSignature(input.Name, input.TypeId), func, CachingConsts.CacheStrategy.ONE_HOURS);
