最近商城進行微信服務商二次進件的開發，大致有幾個點
一，服務商簽名
二，服務商證書獲取
三，圖片上傳
四，敏感信息加密
五，查詢進件狀態
除此之外，就是進件信息的拼裝
電商二級商戶進件申請單-狀態流轉
一 服務商簽名
首先準備必須的配置：商戶號、證書、秘鑰、小程序appid、appsecret
#region 服務商簽名
private string SrvPayBuildAuthAsync(string uri, string body, string method = "POST")
{
var timestamp = DateTimeOffset.Now.ToUnixTimeSeconds();
string nonce = Guid.NewGuid().ToString();
string message = $"{method}
{uri}
{timestamp}
{nonce}
{body}
";
string signature = SrvSign(message);
return $"mchid="{_wxCfg.SrvPayMerchantId}",nonce_str="{nonce}",timestamp="{timestamp}",serial_no="{_wxCfg.SrvPayCertNo}",signature="{signature}"";
}
private string SrvSign(string message)
{
var bytes = Utils.ReadBytesIfExist(_wxCfg.SrvPayCertFile);
if (bytes is null)
{
return "";
}
X509Certificate2 cert = new(bytes, _wxCfg.SrvPayMerchantId);
RSA rsa = cert.GetRSAPrivateKey();
var signData = rsa.SignData(Encoding.UTF8.GetBytes(message), HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
return Convert.ToBase64String(signData);
}
二 獲取證書
分為：第一步獲取證書，第二步解密證書
1 獲取證書
https://api.mch.weixin.qq.com/v3/certificates
#region 獲取平臺證書
public async Task<CertificatesOutModel> GetSrvCert()
{
string uri = "/v3/certificates";
var auth = SrvPayBuildAuthAsync(uri, "", "GET");
var header = new Dictionary<string, string>
{
{ "Authorization",$"WECHATPAY2-SHA256-RSA2048 {auth}"},
{ "Accept","*/*" },
{ "Accept-Encoding","gzip,deflate,brn" },
{ "User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36 Edg/90.0.818.46" },
};
return await GetUrlAsync<CertificatesOutModel>(uri, header);
}
#endregion
使用的實體：CertificatesOutModel
public sealed class CertificatesOutModel : IWXResponse
{
[JsonPropertyName("data")]
public IEnumerable<Certificates> Data { get; set; }
public string Code { get; set; }
public string Message { get; set; }
}
public class Certificates
{
[JsonPropertyName("serial_no")]
public string SerialNo { get; set; }
[JsonPropertyName("effective_time")]
public string EffectiveTime { get; set; }
[JsonPropertyName("expire_time")]
public string ExpireTime { get; set; }
[JsonPropertyName("encrypt_certificate")]
public EncryptCertificate EncryptCertificate { get; set; }
}
請求方法：GetUrlAsync
protected async Task<T> GetUrlAsync<T>(string url, Dictionary<string, string> headers = null)
{
HttpResponseMessage res = null;
try
{
if (headers != null && headers.Count > 0)
{
foreach (var header in headers)
{
_client.DefaultRequestHeaders.TryAddWithoutValidation(header.Key, header.Value);
}
}
res = await _client.GetAsync(url);
res.EnsureSuccessStatusCode();
var result = await res.Content.ReadAsStringAsync();
if (result == null)
{
return default;
}
return result.ToJson<T>();
}
catch
{
var result = await res.Content.ReadAsStringAsync();
if (result == null)
{
return default;
}
return result.ToJson<T>();
}
}
解密方法
//獲取證書
var cert = await _wxClient.GetSrvCert();
var certificateModel = cert.Data.FirstOrDefault();
if (!cert.Data.Any())
{
return new MKResult<V3WXPayApplymentIdOutModel>(code: 400, msg: "未獲取到平臺證書");
}
if (!string.IsNullOrEmpty(applyment.Body.SerialNo))
{
certificateModel = cert.Data.SingleOrDefault(s => s.SerialNo == applyment.Body.SerialNo);
}
certificateModel.EncryptCertificate.Ciphertext = AESUtility.AesGcmDecrypt(
_wxCfg.SrvApiV3Key,
certificateModel.EncryptCertificate.AssociatedData,
certificateModel.EncryptCertificate.Nonce,
certificateModel.EncryptCertificate.Ciphertext
);
三，上傳圖片
因為我的圖片保存在oss，首先要網絡圖片Bytes，對圖片進行sha256，方法在后面
protected async Task<byte[]> GetUrlBytesAsync(string url, Dictionary<string, string> headers = null)
{
try
{
if (headers != null && headers.Count > 0)
{
foreach (var header in headers)
{
_client.DefaultRequestHeaders.TryAddWithoutValidation(header.Key, header.Value);
}
}
var res = await _client.GetAsync(url);
res.EnsureSuccessStatusCode();
return await res.Content.ReadAsByteArrayAsync();
}
catch
{
return default;
}
}
然后上傳圖片
/// <summary>
/// 上傳圖片
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public async Task<MKResult<V3WXPayFileUploadOutModel>> UploadFile(string url)
{
string fileContentType;
string filetype;
if (url!.Contains(".bmp", StringComparison.OrdinalIgnoreCase))
{
fileContentType = "image/bmp";
filetype = ".bmp";
}
else if (url!.Contains(".jpg", StringComparison.OrdinalIgnoreCase))
{
fileContentType = "image/jpeg";
filetype = ".jpg";
}
else if (url!.Contains(".jpeg", StringComparison.OrdinalIgnoreCase))
{
fileContentType = "image/jpeg";
filetype = ".jpeg";
}
else
{
fileContentType = "image/png";
filetype = ".png";
}
UploadMerchantMediaImageRequest meta = new();
var fileBytes = await GetUrlBytesAsync(url);//獲取網絡圖片Bytes
if ((fileBytes?.Length ?? 0) == 0)
{
return new MKResult<V3WXPayFileUploadOutModel>(code: 400, msg: "轉換圖片失敗");
}
meta.FileHash = GetHash(fileBytes);
meta.FileName = Guid.NewGuid().ToString("N").ToLower() + filetype;
string boundary = "--BOUNDARY--" + DateTimeOffset.Now.Ticks.ToString("x");
using var fileContent = new ByteArrayContent(fileBytes);
using var metaContent = new StringContent(meta.ToJson(), Encoding.UTF8, "application/json");
using var httpContent = new MultipartFormDataContent(boundary);
httpContent.Add(metaContent, ""meta"");//meta 必須要加雙引號
httpContent.Add(fileContent, ""file"", """ + meta.FileName + """);//必須要加雙引號
httpContent.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data; boundary=" + boundary);// boundary不能加引號
metaContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse(fileContentType);
var uri = $"/v3/merchant/media/upload";
var res = await V3UpLoadFile<V3WXPayFileUploadOutModel>(uri, meta.ToJson(), httpContent);
return new MKResult<V3WXPayFileUploadOutModel>(res, 1);
}
private async Task<T> V3UpLoadFile<T>(string uri, string meta, MultipartFormDataContent content)
{
var auth = SrvPayBuildAuthAsync(uri, meta);
var header = new Dictionary<string, string>
{
{ "Authorization",$"WECHATPAY2-SHA256-RSA2048 {auth}"},
{ "Accept","*/*" },
{ "Accept-Encoding","gzip,deflate,brn" },
{ "User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36 Edg/90.0.818.46" },
};
return await V3PostFileAsync<T>(uri, header, content);
}
protected async Task<T> V3PostFileAsync<T>(string url, Dictionary<string, string> headers, MultipartFormDataContent content)
{
HttpResponseMessage res = null;
try
{
if (headers != null && headers.Count > 0)
{
foreach (var header in headers)
{
_client.DefaultRequestHeaders.TryAddWithoutValidation(header.Key, header.Value);
}
}
res = await _client.PostAsync(url, content);
res.EnsureSuccessStatusCode();
var result = await res.Content.ReadAsStringAsync();
if (result == null)
{
return default;
}
return result.ToJson<T>();
}
catch
{
var result = await res.Content.ReadAsStringAsync();
if (result == null)
{
return default;
}
return result.ToJson<T>();
}
finally
{
if (content != null)
{
content.Dispose();
}
}
}
#region 二進制內容進行sha256
private static string GetHash(byte[] bytes)
{
if (bytes == null) throw new ArgumentNullException(nameof(bytes));
using SHA256 sha = SHA256.Create();
byte[] hashBytes = sha.ComputeHash(bytes);
return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
}
四，敏感信息加密
使用獲取到的證書certificateModel，進行加密
public static class RSAUtility
{
public static string RSAEncrypt(string text, Certificates certificateModel)
{
var bytes = Encoding.UTF8.GetBytes(certificateModel.EncryptCertificate.Ciphertext);
using var x509 = new X509Certificate2(bytes);
var rsaParam = x509.GetRSAPublicKey().ExportParameters(false);
var rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParam);
var buff = rsa.Encrypt(Encoding.UTF8.GetBytes(text), true);
return Convert.ToBase64String(buff);
}
}
五，查詢進件狀態
直接使用進件返回的Id,調用接口查詢就Ok了
到此這篇關于.Net Core微信服務商二次進件的文章就介紹到這了,更多相關.Net Core微信服務商內容請搜索服務器之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持服務器之家！
原文鏈接：https://www.cnblogs.com/liuYingwei/p/15437991.html
