我需要发送一些文章数据以及文件流。我使用下面的代码。发送表单数据以及用于MPP文件的内容类型“application/vnd.ms-project”的文件数据
此代码取自 http://technet.rapaport.com/Info/LotUpload/SampleCode/Full_Example.aspx。
private Stream GetPostStream(string filePath, Dictionary<string, string> paramMap, string boundary) {
Stream postDataStream = new System.IO.MemoryStream();
//adding form data
string formDataHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine +
"Content-Disposition: form-data; name=\"{0}\";" + Environment.NewLine + Environment.NewLine + "{1}";
foreach (KeyValuePair<string, string> pair in paramMap)
{
byte[] formItemBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(formDataHeaderTemplate, pair.Key, pair.Value));
postDataStream.Write(formItemBytes, 0, formItemBytes.Length);
}
//adding file data
FileInfo fileInfo = new FileInfo(filePath);
string fileHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine +
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +
Environment.NewLine + "Content-Type: application/vnd.ms-project" + Environment.NewLine + Environment.NewLine;
byte[] fileHeaderBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(fileHeaderTemplate, "UploadMPPFile", fileInfo.FullName));
postDataStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);
FileStream fileStream = fileInfo.OpenRead();
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
postDataStream.Write(buffer, 0, bytesRead);
}
fileStream.Close();
byte[] endBoundaryBytes = System.Text.Encoding.UTF8.GetBytes("--" + boundary + "--");
postDataStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
return postDataStream;
}
在JAVA上的服务器端,我使用MPXJ第三方库来读取文件数据。但是,我遇到以下异常。它报告标题签名中的一些不匹配错误。
嵌套的例外是:net.sf.mpxj.MPXJException:错误读取文件] 与根源java.io.IOException的:标题无效签名;阅读 0x2D2D2D2D2D2D0A0D,预计0xE11AB1A1E011CFD0在 org.apache.poi.poifs.storage.HeaderBlockReader。(HeaderBlockReader.java:125) 在 org.apache.poi.poifs.filesystem.POIFSFileSystem。(POIFSFileSystem.java:153) 在net.sf.mpxj.mpp.MPPReader.read(MPPReader.java:84)
任何人都可以请帮助我这种情况,并提出一些解决方案!
非常感谢。