Response下載文件亂碼問題處理

女爷i 2022-06-06 07:27 147阅读 0赞

特殊字符亂碼問題如出現&和空格之類的字符  
測試IE,Chrome,手機瀏覽器,Firefox另外一套

context.Response.ContentType = "application/octet-stream";//下載跟這個關係不大,默認就這樣寫了
     if (context.Request.UserAgent.ToLower().IndexOf("firefox", System.StringComparison.Ordinal) > -1)//firefox浏览器
                {
                    context.Response.AddHeader("content-disposition", "attachment;filename=\"" + fileInfo.Name + "\"");
                }
                else {
                    context.Response.AddHeader("content-disposition", "filename=" + HttpUtility.UrlPathEncode(fileInfo.Name));//注意此處是UrlPathEncode,如果是UrlEncode也可能出現亂碼比如空格變成加號,如果下載出現相對路徑的(通常Chrome,(文件名含有空格,逗號之類的)可以將文件名加上引號"filename=\"" + HttpUtility.UrlPathEncode(fileInfo.Name) + "\"")
                }

因為配置信息沒設置導致下載

<system.web>
        
        <httpRuntime maxRequestLength="10240" requestPathInvalidCharacters="" requestValidationMode="2.0"/>
       <security>
          
          <requestFiltering allowDoubleEscaping="true"></requestFiltering>
        </security>

HttpHandler里獲取context.Request.UserAgent可能導致手持設備無法下載  
盜鏈下載里使用方法  
IHttpHandler

string Plat = context.Request.Browser.Platform;
       FileInfo fileInfo = new FileInfo(text);
    context.Response.ContentType = "application/octet-stream";
    if (Plat == "WinNT")
    {
         string Agents = context.Request.UserAgent.ToLower();//一旦獲取此值,手持設備無法下載,不知道為啥
         if (Agents.IndexOf("firefox", System.StringComparison.Ordinal) > -1)//firefox浏览器
         {
            context.Response.AddHeader("content-disposition", "attachment;filename=\"" + fileInfo.Name + "\"");
         }
        else
        {
         context.Response.AddHeader("content-disposition", "filename=" + HttpUtility.UrlPathEncode(fileInfo.Name));
        }
    }
    else
    {
    //支持手機端下載
         context.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileInfo.Name, Encoding.UTF8));
    }
    context.Response.WriteFile(text);