Windows服务器向Linux服务器传输含!的密码报错求助

问题出在手动处理Basic认证编码的方式不符合HTTP规范，和Windows/Linux的转义规则无关。以下是两种解决方案：

方案1：使用RestSharp内置Basic认证器（推荐） #

RestSharp提供了专门的HttpBasicAuthenticator，会自动遵循RFC 7617规范处理用户名和密码的编码，包括特殊字符，无需手动拼接和转码：

string Username = "myUserName";
string Password = "password123!";

var client = new RestClient("https://linuxserver/xml-data/data-producer-listdata");
// 配置内置Basic认证
client.Authenticator = new HttpBasicAuthenticator(Username, Password);

var request = new RestRequest("", Method.Get);
request.AddHeader("cache-control", "no-cache");
request.AddHeader("Connection", "keep-alive");

var response = client.Execute(request);

方案2：手动规范编码（不推荐） #

如果必须手动处理认证头，需改用UTF-8编码（HTTP Basic Auth规范要求）而非ASCII编码，确保特殊字符被正确转换：

string Username = "myUserName";
string Password = "password123!";
string authenticationString = $"{Username}:{Password}";
// 用UTF-8编码替代ASCII
byte[] authBytes = System.Text.Encoding.UTF8.GetBytes(authenticationString);
string base64EncodedAuthenticationString = Convert.ToBase64String(authBytes);

var client = new RestClient("https://linuxserver/xml-data/data-producer-listdata");

var request = new RestRequest("", Method.Get);
request.AddHeader("cache-control", "no-cache");
request.AddHeader("Authorization", "Basic " + base64EncodedAuthenticationString);
request.AddHeader("Connection", "keep-alive");
var response = client.Execute(request);

为什么之前的方法失效？ #

HTTP Basic Auth规范要求将用户名密码拼接后用UTF-8编码再转Base64，而非ASCII。虽然!属于ASCII字符，但部分服务端会严格校验编码格式，手动用ASCII编码可能导致服务端解析失败，返回400错误。

内容的提问来源于stack exchange，提问作者David