我有一个使用multipart / Form-Data的WCF服务，如何获取属性和上传的文件
答案 0 :(得分：1)
最后我的服务正常运作。
我创造了一个倍增器。
public class MultipartParser
{
public MultipartParser(Stream stream)
{
this.Parse(stream, Encoding.UTF8);
}
public static byte[][] Separate(byte[] source, byte[] separator)
{
var Parts = new List<byte[]>();
var Index = 0;
byte[] Part;
for (var I = 0; I < source.Length; ++I)
{
if (Equals(source, separator, I))
{
Part = new byte[I - Index];
Array.Copy(source, Index, Part, 0, Part.Length);
Parts.Add(Part);
Index = I + separator.Length;
I += separator.Length - 1;
}
}
Part = new byte[source.Length - Index];
Array.Copy(source, Index, Part, 0, Part.Length);
Parts.Add(Part);
return Parts.ToArray();
}
public static bool Equals(byte[] source, byte[] separator, int index)
{
for (int i = 0; i < separator.Length; ++i)
if (index + i >= source.Length || source[index + i] != separator[i])
return false;
return true;
}
private void Parse(Stream stream, Encoding encoding)
{
Regex regQuery;
Match regMatch;
string propertyType;
// The first line should contain the delimiter
byte[] data = ToByteArray(stream);
// Copy to a string for header parsing
string content = encoding.GetString(data);
int delimiterEndIndex = content.IndexOf("\r\n");
if (delimiterEndIndex > -1)
{
string delimiterString = content.Substring(0, content.IndexOf("\r\n"));
byte[] delimiterBytes = encoding.GetBytes(delimiterString);
byte[] delimiterWithNewLineBytes = encoding.GetBytes(delimiterString + "\r\n");
// the request ends DELIMITER--\r\n
byte[] delimiterEndBytes = encoding.GetBytes("\r\n" + delimiterString + "--\r\n");
int lengthDifferenceWithEndBytes = (delimiterString + "--\r\n").Length;
byte[][] separatedStream = Separate(data, delimiterWithNewLineBytes);
data = null;
for (int i = 0; i < separatedStream.Length; i++)
{
// parse out whether this is a parameter or a file
// get the first line of the byte[] as a string
string thisPieceAsString = encoding.GetString(separatedStream[i]);
if (string.IsNullOrWhiteSpace(thisPieceAsString)) { continue; }
string firstLine = thisPieceAsString.Substring(0, thisPieceAsString.IndexOf("\r\n"));
// Check the item to see what it is
regQuery = new Regex(@"(?<=name\=\"")(.*?)(?=\"")");
regMatch = regQuery.Match(firstLine);
propertyType = regMatch.Value.Trim();
// get the index of the start of the content and the end of the content
int indexOfStartOfContent = thisPieceAsString.IndexOf("\r\n\r\n") + "\r\n\r\n".Length;
// this line compares the name to the name of the html input control,
// this can be smarter by instead looking for the filename property
StreamContent myContent = new StreamContent();
if (propertyType.ToUpper().Trim() != "FILES")
{
// this is a parameter!
// if this is the last piece, chop off the final delimiter
int lengthToRemove = (i == separatedStream.Length - 1) ? lengthDifferenceWithEndBytes : 0;
string value = thisPieceAsString.Substring(indexOfStartOfContent, thisPieceAsString.Length - "\r\n".Length - indexOfStartOfContent - lengthToRemove);
myContent.StringData = value;
myContent.PropertyName = propertyType;
if (StreamContents == null)
StreamContents = new List<StreamContent>();
StreamContents.Add(myContent);
this.Success = true;
}
else
{
// this is a file!
regQuery = new Regex(@"(?<=filename\=\"")(.*?)(?=\"")");
regMatch = regQuery.Match(firstLine);
string fileName = regMatch.Value.Trim();
// get the content byte[]
// if this is the last piece, chop off the final delimiter
int lengthToRemove = (i == separatedStream.Length - 1) ? delimiterEndBytes.Length : 0;
int contentByteArrayStartIndex = encoding.GetBytes(thisPieceAsString.Substring(0, indexOfStartOfContent)).Length;
byte[] fileData = new byte[separatedStream[i].Length - contentByteArrayStartIndex - lengthToRemove];
Array.Copy(separatedStream[i], contentByteArrayStartIndex, fileData, 0, separatedStream[i].Length - contentByteArrayStartIndex - lengthToRemove);
// save the fileData byte[] as the file
myContent.PropertyName = propertyType;
myContent.FileName = fileName;
myContent.IsFile = true;
myContent.Data = fileData;
if (StreamContents == null)
StreamContents = new List<StreamContent>();
StreamContents.Add(myContent);
this.Success = true;
}
}
}
}
private byte[] ToByteArray(Stream stream)
{
byte[] buffer = new byte[32768];
using (MemoryStream ms = new MemoryStream())
{
while (true)
{
int read = stream.Read(buffer, 0, buffer.Length);
if (read <= 0)
return ms.ToArray();
ms.Write(buffer, 0, read);
}
}
}
public List<StreamContent> StreamContents { get; set; }
public bool Success
{
get;
private set;
}
public string ContentType
{
get;
private set;
}
public string Filename
{
get;
private set;
}
public List<byte[]> FileContents
{
get;
private set;
}
}
public class StreamContent
{
public byte[] Data { get; set; }
public bool IsFile { get; set; }
public string FileType { get; set; }
public string FileName { get; set; }
public string PropertyName { get; set; }
public string StringData { get; set; }
}`
使用此解析器，您可以在List对象中获取属性及其值。在服务中使用以下
MultipartParser parser = new MultipartParser(stream);
if (parser != null && parser.Success)
{
foreach (var content in parser.StreamContents)
{
if (content.IsFile) // if file
{
string path = "Your Path";
//content.FileName; file Name
//content.Data File contents in byte[]
// Write the file to the path specifies
File.WriteAllBytes(path+content.FileName, content.Data);
continue;
}
//content.PropertyName; gives u the Parameter
//content.StringData; gives u the value of the parameter
}
}