Asp.NET 简易通用WebServices 附件服务

[toc]
总述:
用了很久的附件分离服务, .NET 2.0平台开始使用.  配置好服务后, 由调用端定义并管理目录级次.  调用端存储目录即可. 
附件服务:

相应配置节点放入 web.config

<?xml version="1.0"?>
<configuration>
<system.web>
<httpRuntime maxRequestLength="409600" executionTimeout="60000" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="100" enableVersionHeader="true"/>
<compilation debug="true"/>
</system.web>
<appSettings>
<add key="path" value="D:\XXX\FileAttachments\"/>
<add key="pathSignature" value="D:\XXX\Signature\"/>
</appSettings>
</configuration>

代码部分; 
- 采用较早的.NET 2.0 部分, 所以写法较旧, 写入时委托异步先写临时文件, 完毕再写入真实文件. 减少一定的资源占用.

using System;
using System.Collections.Generic;using System.Web;
using System.Web.Services;
using System.IO;
using System.Configuration;
using System.Text;
using System.Threading;namespace SY_FileService
{
/// <summary>
/// WebService1 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
// [System.Web.Script.Services.ScriptService]
public class FileService : System.Web.Services.WebService
{ [WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public bool upload(byte[] f, string path,string fileName)
{
try
{
var path1 = ConfigurationManager.AppSettings["path"] + path; if (!Directory.Exists(Path.GetDirectoryName(path1)))
{
Directory.CreateDirectory(Path.GetDirectoryName(path1));
} if (!File.Exists(path1))
{
new Thread(delegate()
{
var tmppath = ConfigurationManager.AppSettings["path"] +"文件映射/"+ DateTime.Now.ToString("yyyyMMdd") + ".txt";
if (!Directory.Exists(Path.GetDirectoryName(tmppath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(tmppath));
}
using (FileStream fs = new FileStream(tmppath, FileMode.Append, FileAccess.Write, FileShare.Write))
{
using (StreamWriter sw = new StreamWriter(fs, Encoding.Default))
{
sw.Write(path + " * " + fileName + "\r\n");
}
}
}) { IsBackground=true}.Start(); File.Create(path1).Close();
}
File.WriteAllBytes(path1, f);
return true;
}
catch (Exception)
{ return false;
}
} [WebMethod]
public bool Delete(string path)
{
try
{
var path1 = ConfigurationManager.AppSettings["path"] + path; if (!Directory.Exists(Path.GetDirectoryName(path1)))
{
Directory.CreateDirectory(Path.GetDirectoryName(path1));
} if (File.Exists(path1))
{
File.Delete(path1);
}
return true;
}
catch (Exception ex)
{ return false;
}
}
[WebMethod]
public byte[] Download(string path)
{
try
{
var path1 = ConfigurationManager.AppSettings["path"] + path; if (!Directory.Exists(Path.GetDirectoryName(path1)))
{
Directory.CreateDirectory(Path.GetDirectoryName(path1));
} if (File.Exists(path1))
{
return File.ReadAllBytes(path1);
}
return new byte[] { };
}
catch (Exception)
{
return new byte[] { };
}
} [WebMethod]
public bool uploadSignature(byte[] f, string path, string fileName)
{
try
{
var path1 = ConfigurationManager.AppSettings["pathSignature"] + path; if (!Directory.Exists(Path.GetDirectoryName(path1)))
{
Directory.CreateDirectory(Path.GetDirectoryName(path1));
} if (!File.Exists(path1))
{
new Thread(delegate()
{
var tmppath = ConfigurationManager.AppSettings["path"] + "文件映射/" + DateTime.Now.ToString("yyyyMMdd") + ".txt";
if (!Directory.Exists(Path.GetDirectoryName(tmppath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(tmppath));
}
using (FileStream fs = new FileStream(tmppath, FileMode.Append, FileAccess.Write, FileShare.Write))
{
using (StreamWriter sw = new StreamWriter(fs, Encoding.Default))
{
sw.Write(path + " * " + fileName + "\r\n");
}
}
}) { IsBackground = true }.Start(); File.Create(path1).Close();
}
File.WriteAllBytes(path1, f);
return true;
}
catch (Exception)
{ return false;
}
}
[WebMethod]
public byte[] DownloadSignature(string path)
{
try
{
var path1 = ConfigurationManager.AppSettings["pathSignature"] + path; if (!Directory.Exists(Path.GetDirectoryName(path1)))
{
Directory.CreateDirectory(Path.GetDirectoryName(path1));
} if (File.Exists(path1))
{
return File.ReadAllBytes(path1);
}
return new byte[] { };
}
catch (Exception ex)
{ return new byte[] { };
}
}
}
}


如下以签名为例, 表示的调用代码;

HttpResult HttpUploadFile(string url, byte[] fileBuffer, string fileName)
{
// 设置参数
var request = WebRequest.Create(url) as HttpWebRequest;
request.CookieContainer = new CookieContainer();
request.AllowAutoRedirect = true;
request.Method = "POST";
string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
var itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
var endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); //请求头部信息
var headerBuilder = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
var headerBytes = Encoding.UTF8.GetBytes(headerBuilder.ToString()); var requestStream = request.GetRequestStream();
requestStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
requestStream.Write(headerBytes, 0, headerBytes.Length);
requestStream.Write(fileBuffer, 0, fileBuffer.Length);
requestStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
requestStream.Close(); //发送请求并获取相应回应数据
var response = request.GetResponse() as HttpWebResponse; //直到request.GetResponse()程序才开始向目标网页发送Post请求
var responseStream = response.GetResponseStream();
var streamReader = new StreamReader(responseStream, Encoding.UTF8); //返回结果
string content = streamReader.ReadToEnd();
var result = JsonConvert.DeserializeObject<HttpResult>(content);
return result;
} public byte[] DownloadSignature(string path) {
BMPFileService.DownloadSignatureRequest inValue = new BMPFileService.DownloadSignatureRequest();
inValue.Body = new BMPFileService.DownloadSignatureRequestBody();
inValue.Body.path = path;
BMPFileService.DownloadSignatureResponse retVal = ((BMPFileService.FileServiceSoap)(this)).DownloadSignature(inValue);
return retVal.Body.DownloadSignatureResult;
}//使用调用:
appr.Signature = a["签名"] == DBNull.Value ? "" : Convert.ToBase64String(fs.DownloadSignature(HttpUtility.UrlDecode(a["签名"].ToString(), Encoding.UTF8)));

同理, 相应的上传配置文件, 需要自定义目录, 下载时取得端口, 需要自定义配置:

<add key="FileApiHost" value="localhost:9992" />
<add key="SignPath" value="XXX\Content\Signatures\" />
<add key="ProjectAttachmentPath" value="XXX/Content/ProjectAttachmentFiles/" />
<add key="FileServer" value="/XXXFiles" />