首先,以下方式是错误的(这个重复读取只能在using语句里面生效,因为用了ms对象赋值,当using结束后ms资源被释放,Request.Body就无法再读了)
[HttpPost] public async Task<string> Post() { //StreamReader sr = new StreamReader(Request.Body); //string data = await sr.ReadToEndAsync(); string data = ""; using (MemoryStream ms = new MemoryStream()) { await Request.Body.CopyToAsync(ms); //设置当前流的位置为0 ms.Seek(0, SeekOrigin.Begin); logger.LogInformation("ms.Length=" + ms.Length); //这里ReadToEnd执行完毕后requestBodyStream流的位置会从0到最后位置(即request.ContentLength) data = new StreamReader(ms, Encoding.UTF8).ReadToEnd(); logger.LogInformation("data=" + data); //设置当前流的位置为0 ms.Seek(0, SeekOrigin.Begin); Request.Body = ms; StreamReader sr = new StreamReader(Request.Body); string data2 = await sr.ReadToEndAsync(); logger.LogInformation("data2=" + data2); } string header = $"请求头:\r\n"; foreach (var item in Request.Headers) { header += $"{item.Key}:{item.Value}\r\n"; } logger.LogInformation(header); var ip = Request.Headers["X-Forwarded-For"].FirstOrDefault(); if (string.IsNullOrEmpty(ip)) { //ip = Request.HttpContext.Connection.RemoteIpAddress.ToString(); //ip = Request.HttpContext.Connection.LocalIpAddress.MapToIPv4().ToString(); ip = Request.HttpContext.Connection.RemoteIpAddress.MapToIPv4().ToString(); } logger.LogInformation("ip=" + ip); //... }
正确方式是:
[HttpPost] public async Task<string> Post() { //StreamReader sr = new StreamReader(Request.Body); //string data = await sr.ReadToEndAsync(); string data = ""; //Request.EnableBuffering();可以实现多次读取Body Request.EnableBuffering(); StreamReader sr = new StreamReader(Request.Body); data = await sr.ReadToEndAsync(); logger.LogInformation("data=" + data); Request.Body.Seek(0, SeekOrigin.Begin); //再次读取 依然可以成功读到 Request.EnableBuffering(); StreamReader sr2 = new StreamReader(Request.Body); string data2 = await sr2.ReadToEndAsync(); logger.LogInformation("data2=" + data2); Request.Body.Seek(0, SeekOrigin.Begin); string header = $"请求头:\r\n"; foreach (var item in Request.Headers) { header += $"{item.Key}:{item.Value}\r\n"; } logger.LogInformation(header); var ip = Request.Headers["X-Forwarded-For"].FirstOrDefault(); if (string.IsNullOrEmpty(ip)) { //ip = Request.HttpContext.Connection.RemoteIpAddress.ToString(); //ip = Request.HttpContext.Connection.LocalIpAddress.MapToIPv4().ToString(); ip = Request.HttpContext.Connection.RemoteIpAddress.MapToIPv4().ToString(); } logger.LogInformation("ip=" + ip); //... }
Asp.NetCore3.1 asp.net 5.0 中多次读取 Request.Body Ajax Post过来的JSON数据等 已验证有效