public int DownloadObject0(System.Web.UI.Page Page,
LibraryChannel channel,
string strPath,
bool bSaveAs,
string strStyle,
out string strError)
{
strError = "";
WebPageStop stop = new WebPageStop(Page);
// strPath = boards.GetCanonicalUri(strPath);
// 获得资源。写入文件的版本。特别适用于获得资源，也可用于获得主记录体。
// parameters:
// fileTarget 文件。注意在调用函数前适当设置文件指针位置。函数只会在当前位置开始向后写，写入前不会主动改变文件指针。
// strStyleParam 一般设置为"content,data,metadata,timestamp,outputpath";
// input_timestamp 若!=null，则本函数会把第一个返回的timestamp和本参数内容比较，如果不相等，则报错
// return:
// -1 出错。具体出错原因在this.ErrorCode中。this.ErrorInfo中有出错信息。
// 0 成功
string strMetaData = "";
string strOutputPath;
byte[] baOutputTimeStamp = null;
byte[] baContent = null;
// 只获得媒体类型
long lRet = channel.GetRes(
stop,
strPath,
0,
0,
"metadata",
out baContent,
out strMetaData,
out strOutputPath,
out baOutputTimeStamp,
out strError);
if (lRet == -1)
{
if (StringUtil.IsInList("hitcount", strStyle))
{
OutputImage(Page,
Color.FromArgb(100, Color.Red),
"?");
return 1;
}
if (channel.ErrorCode == ErrorCode.AccessDenied)
{
// 权限不够
return -1;
}
strError = "GetRes() (for metadata) Error : " + strError;
return -1;
}
if (Page.Response.IsClientConnected == false)
return -1;
// 取 metadata 中的 mime 类型信息
Hashtable values = StringUtil.ParseMedaDataXml(strMetaData,
out strError);
if (values == null)
{
strError = "ParseMedaDataXml() Error :" + strError;
return -1;
}
if (StringUtil.IsInList("hitcount", strStyle))
{
string strReadCount = (string)values["readCount"];
if (string.IsNullOrEmpty(strReadCount) == true)
strReadCount = "?";
OutputImage(Page,
Color.FromArgb(200, Color.DarkGreen),
strReadCount);
return 1;
}
#if NO
RETURN_IMAGE:
if (StringUtil.IsInList("hitcount", strStyle))
{
string strReadCount = (string)values["readCount"];
if (string.IsNullOrEmpty(strReadCount) == true)
strReadCount = "?";
// 文字图片
using (MemoryStream image = ArtText.BuildArtText(
strReadCount,
"Microsoft YaHei",
(float)12,
FontStyle.Regular,
Color.Black,
Color.White,
Color.Gray,
ArtEffect.None,
ImageFormat.Jpeg,
100))
{
Page.Response.ContentType = "image/jpeg";
Page.Response.AddHeader("Content-Length", image.Length.ToString());
Page.Response.AddHeader("Pragma", "no-cache");
Page.Response.AddHeader("Cache-Control", "no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
Page.Response.AddHeader("Expires", "0");
// FlushOutput flushdelegate = new FlushOutput(MyFlushOutput);
image.Seek(0, SeekOrigin.Begin);
StreamUtil.DumpStream(image, Page.Response.OutputStream/*, flushdelegate*/);
}
Page.Response.Flush();
return 1;
}
#endif
string strLastModifyTime = (string)values["lastmodifytime"];
if (String.IsNullOrEmpty(strLastModifyTime) == false)
{
DateTime lastmodified = DateTime.Parse(strLastModifyTime).ToUniversalTime();
string strIfHeader = Page.Request.Headers["If-Modified-Since"];
if (String.IsNullOrEmpty(strIfHeader) == false)
{
DateTime isModifiedSince = DateTimeUtil.FromRfc1123DateTimeString(strIfHeader); // .ToLocalTime();
if (DateTimeUtil.CompareHeaderTime(isModifiedSince, lastmodified) != 0)
{
// 修改过
}
else
{
// 没有修改过
Page.Response.StatusCode = 304;
Page.Response.SuppressContent = true;
return 0;
}
}
Page.Response.AddHeader("Last-Modified", DateTimeUtil.Rfc1123DateTimeString(lastmodified)); // .ToUniversalTime()
/*
Page.Response.Cache.SetLastModified(lastmodified);
Page.Response.Cache.SetCacheability(HttpCacheability.Public);
* */
}
string strMime = (string)values["mimetype"];
string strClientPath = (string)values["localpath"];
if (strClientPath != "")
strClientPath = PathUtil.PureName(strClientPath);
// TODO: 如果是非image/????类型，都要加入content-disposition
// 是否出现另存为对话框
if (bSaveAs == true)
{
string strEncodedFileName = HttpUtility.UrlEncode(strClientPath, Encoding.UTF8);
Page.Response.AddHeader("content-disposition", "attachment; filename=" + strEncodedFileName);
}
/*
Page.Response.AddHeader("Accept-Ranges", "bytes");
Page.Response.AddHeader("Last-Modified", "Wed, 21 Nov 2007 07:10:54 GMT");
* */
// 用 text/plain IE XML 搜索google
// http://support.microsoft.com/kb/329661
// http://support.microsoft.com/kb/239750/EN-US/
/*
To use this fix, you must add the following registry value to the key listed below:
Key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Value name: IsTextPlainHonored
Value type: DWORD
Value data: HEX 0x1
* */
/*
Page.Response.CacheControl = "no-cache"; // 如果不用此句，text/plain会被当作xml文件打开
Page.Response.AddHeader("Pragma", "no-cache");
Page.Response.AddHeader("Cache-Control", "no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
// Page.Response.AddHeader("Cache-Control", "public");
Page.Response.AddHeader("Expires", "0");
Page.Response.AddHeader("Content-Transfer-Encoding", "binary");
* */
// 设置媒体类型
if (strMime == "text/plain")
strMime = "text";
Page.Response.ContentType = strMime;
string strSize = (string)values["size"];
if (String.IsNullOrEmpty(strSize) == false)
{
Page.Response.AddHeader("Content-Length", strSize);
}
if (Page.Response.IsClientConnected == false)
return -1;
// 传输数据
lRet = channel.GetRes(
stop,
strPath,
Page.Response.OutputStream,
"content,data,incReadCount",
null, // byte [] input_timestamp,
out strMetaData,
out baOutputTimeStamp,
out strOutputPath,
out strError);
if (lRet == -1)
{
strError = "GetRes() (for res) Error : " + strError;
return -1;
}
return 1;
}
public static int SaveUploadFile(
System.Web.UI.Page page,
LibraryChannel channel,
string strXmlRecPath,
string strFileID,
string strResTimeStamp,
HttpPostedFile postedFile,
int nLogoLimitW,
int nLogoLimitH,
out string strError)
{
strError = "";
if (String.IsNullOrEmpty(postedFile.FileName) == true
&& postedFile.ContentLength == 0)
{
return 0; // 没有必要保存
}
WebPageStop stop = new WebPageStop(page);
string strResPath = strXmlRecPath + "/object/" + strFileID;
string strLocalFileName = Path.GetTempFileName();
try
{
using (Stream t = File.Create(strLocalFileName))
{
// 缩小尺寸
int nRet = GraphicsUtil.ShrinkPic(postedFile.InputStream,
postedFile.ContentType,
nLogoLimitW,
nLogoLimitH,
true,
t,
out strError);
if (nRet == -1)
return -1;
if (nRet == 0) // 没有必要缩放
{
postedFile.InputStream.Seek(0, SeekOrigin.Begin);
StreamUtil.DumpStream(postedFile.InputStream, t);
}
}
// t.Close();
// 检测文件尺寸
FileInfo fi = new FileInfo(strLocalFileName);
if (fi.Exists == false)
{
strError = "文件 '" + strLocalFileName + "' 不存在...";
return -1;
}
string[] ranges = null;
if (fi.Length == 0)
{ // 空文件
ranges = new string[1];
ranges[0] = "";
}
else
{
string strRange = "";
strRange = "0-" + Convert.ToString(fi.Length - 1);
// 按照100K作为一个chunk
ranges = RangeList.ChunkRange(strRange,
100 * 1024);
}
byte[] timestamp = ByteArray.GetTimeStampByteArray(strResTimeStamp);
byte[] output_timestamp = null;
// 2007/12/13
string strLastModifyTime = DateTime.UtcNow.ToString("u");
string strLocalPath = postedFile.FileName;
// page.Response.Write("<br/>正在保存" + strLocalPath);
REDOWHOLESAVE:
string strWarning = "";
for (int j = 0; j < ranges.Length; j++)
{
REDOSINGLESAVE:
// Application.DoEvents(); // 出让界面控制权
if (stop.State != 0)
{
strError = "用户中断";
goto ERROR1;
}
string strWaiting = "";
if (j == ranges.Length - 1)
strWaiting = " 请耐心等待...";
string strPercent = "";
RangeList rl = new RangeList(ranges[j]);
if (rl.Count >= 1)
{
double ratio = (double)((RangeItem)rl[0]).lStart / (double)fi.Length;
strPercent = String.Format("{0,3:N}", ratio * (double)100) + "%";
}
if (stop != null)
stop.SetMessage("正在上载 " + ranges[j] + "/"
+ Convert.ToString(fi.Length)
+ " " + strPercent + " " + strLocalFileName + strWarning + strWaiting);
// page.Response.Write("."); // 防止前端因等待过久而超时
long lRet = channel.SaveResObject(
stop,
strResPath,
strLocalFileName,
strLocalPath,
postedFile.ContentType,
ranges[j],
j == ranges.Length - 1 ? true : false, // 最尾一次操作，提醒底层注意设置特殊的WebService API超时时间
timestamp,
out output_timestamp,
out strError);
/*
long lRet = channel.DoSaveResObject(strResPath,
strLocalFileName,
strLocalPath,
postedFile.ContentType,
strLastModifyTime,
ranges[j],
j == ranges.Length - 1 ? true : false, // 最尾一次操作，提醒底层注意设置特殊的WebService API超时时间
timestamp,
out output_timestamp,
out strError);
* */
timestamp = output_timestamp;
// DomUtil.SetAttr(node, "__timestamp", ByteArray.GetHexTimeStampString(timestamp));
strWarning = "";
if (lRet == -1)
{
if (channel.ErrorCode == CirculationClient.localhost.ErrorCode.TimestampMismatch)
{
timestamp = new byte[output_timestamp.Length];
Array.Copy(output_timestamp, 0, timestamp, 0, output_timestamp.Length);
strWarning = " (时间戳不匹配, 自动重试)";
if (ranges.Length == 1 || j == 0)
goto REDOSINGLESAVE;
goto REDOWHOLESAVE;
}
goto ERROR1;
}
}
return 1; // 已经保存
ERROR1:
return -1;
}
finally
{
// 不要忘记删除临时文件
File.Delete(strLocalFileName);
}
}