public void ReturnExpectPosWhenSubsenquenceFound()
{
var sub = new byte[] { 15, 20, 22, 23 };
var sub1 = new byte[] { 11, 20, 22, 23, 15, 15, 20, 22, 23, 222, 111, 100 };
var full = new byte[] { 11, 20, 22, 23, 15, 15, 20, 22, 23, 222, 111, 100 };
int pos = SubsenquenceFinder.Search(full, sub);
int pos1 = SubsenquenceFinder.Search(full, sub1);
Assert.AreEqual(pos, 5);
Assert.AreEqual(pos1, 0);
}
public void ReturnNegativeOneWhenSubsenquenceNotFound()
{
var sub = new byte[] { 15, 20, 22, 23 };
var sub1 = new byte[] { 11, 20, 22, 23, 15, 15, 21, 22, 23, 222, 111, 100, 2 };
var full = new byte[] { 11, 20, 22, 23, 15, 15, 21, 22, 23, 222, 111, 100 };
int pos = SubsenquenceFinder.Search(full, sub);
int pos1 = SubsenquenceFinder.Search(full, sub1);
Assert.AreEqual(pos, -1);
Assert.AreEqual(pos, -1);
}
private async Task ParseFilePartAsync(RebufferableStreamReader reader, Dictionary <string, string> partHeaders)
{
//先使用内存存储吧，遇到大文件肯定是不行的
MemoryStream ms = new MemoryStream();
var curBuffer = new byte[this.BinaryBufferSize];
var prevBuffer = new byte[this.BinaryBufferSize];
int curLength = 0;
int prevLength = await reader.ReadAsync(prevBuffer, 0, prevBuffer.Length);
int endPos = -1;
do
{
curLength = await reader.ReadAsync(curBuffer, 0, curBuffer.Length);
var fullBuffer = new Byte[prevLength + curLength];
Buffer.BlockCopy(prevBuffer, 0, fullBuffer, 0, prevLength);
Buffer.BlockCopy(curBuffer, 0, fullBuffer, prevLength, curLength);
int endBoundaryPos = SubsenquenceFinder.Search(fullBuffer, endBoundaryBytes);
int boundaryPos = SubsenquenceFinder.Search(fullBuffer, boundaryBytes);
if (endBoundaryPos >= 0 && boundaryPos >= 0)
{
if (boundaryPos < endBoundaryPos)
{
endPos = boundaryPos;
}
else
{
endPos = endBoundaryPos;
this.readEndBoundary = true;
}
}
else if (boundaryPos >= 0 && endBoundaryPos < 0)
{
endPos = boundaryPos;
}
else if (endBoundaryPos >= 0 && boundaryPos < 0)
{
endPos = endBoundaryPos;
this.readEndBoundary = true;
}
if (endPos != -1)
{
//这里endPos减2的原因是去除CRLF
ms.Write(fullBuffer, 0, endPos - 2);
var rebuffer = new byte[fullBuffer.Length - endPos];
Buffer.BlockCopy(fullBuffer, endPos, rebuffer, 0, rebuffer.Length);
reader.Rebuffer(rebuffer);
ms.Flush();
ms.Position = 0;
FilePart filePart = new FilePart()
{
Filename = partHeaders["filename"],
Name = partHeaders["name"],
Data = ms
};
this.Files.Add(filePart);
return;
}
ms.Write(prevBuffer, 0, prevLength);
ms.Flush();
prevBuffer = curBuffer;
prevLength = curLength;
}while (prevLength > 0);
if (endPos == -1)
{
ms.Close();
throw new HttpRequestParseException("http报文实体格式错误");
}
}