public Form Parse()
{
// locality for performance
byte[] bound_ = this.bound;
byte[] buffer_ = this.buffer;
int length_ = this.length;
// UTF-8 header builder
Header hdr = new Header(128);
Text text = new Text(128);
// keep local for speed
int boundlen = bound_.Length;
// shall init lately
Form frm = null;
int p = 0;
// skip first bound line whatever
for (;;)
{
if (buffer_[p++] == '\r' && buffer_[p++] == '\n')
{
break;
}
}
// parse parts
for (;;)
{
string name = null;
string filename = null;
string ctype = null;
// parse headers
for (;;)
{
hdr.Clear();
// parse a header line
for (;;)
{
if (p >= length_ - 2)
{
throw ParserEx;
}
byte b;
if ((b = buffer_[p++]) == '\r' && buffer_[p++] == '\n')
{
break;
}
hdr.Accept(b); // lineup the byte
}
if (hdr.Count == 0) // if empty line then quit header section
{
break;
}
if (name == null && hdr.Check("Content-Disposition"))
{
name = hdr.SeekParam("name");
filename = hdr.SeekParam("filename");
}
else if (ctype == null && hdr.Check("Content-Type"))
{
ctype = hdr.GetVvalue();
}
}
// get part's content
text.Clear();
bool plain = ctype == null || "text/plain".Equals(ctype);
int start = p; // mark down content start
int idx = 0; // index on bound
for (;;)
{
byte b = buffer_[p++];
if (b == bound_[idx])
{
idx++;
if (idx >= boundlen) // fully matched the bound accumulatively
{
if (frm == null)
{
frm = new Form(true)
{
Buffer = buffer_
}
}
;
if (plain)
{
frm.Add(name, text.ToString());
}
else
{
frm.Add(name, filename, start, p - start - boundlen);
}
// goto the ending CRLF/-- check
break;
}
}
else if (idx > 0) // if fail-match
{
if (plain) // re-add
{
for (int i = 0; i < idx; i++)
{
text.Accept(bound_[i]);
}
}
idx = 0; // reset
}
else
{
if (plain)
{
text.Accept(b);
}
}
}
// check if any more part
if (buffer_[p++] == '\r' && buffer_[p++] == '\n')
{
continue;
}
break;
} // parts
return(frm ?? Empty);
}
}