mormot multipart上传文件

首先修改mormot的MultiPartFormDataEncode()

function MultiPartFormDataEncode(const MultiPart: TMultiPartDynArray;
  var MultiPartContentType, MultiPartContent: RawUTF8): boolean;
var len, boundcount, filescount, i: integer;
    boundaries: array of RawUTF8;
    bound: RawUTF8;
    W: TTextWriter;
    temp: TTextWriterStackBuffer;
  procedure NewBound;
  var random: array[1..3] of cardinal;
  begin
    FillRandom(@random,3);
    bound := BinToBase64(@random,SizeOf(Random));
    SetLength(boundaries,boundcount+1);
    boundaries[boundcount] := bound;
    inc(boundcount);
  end;
begin
  result := false;
  len := length(MultiPart);
  if len=0 then exit;

  boundcount := 0;
  filescount := 0;
  W := TTextWriter.CreateOwnedStream(temp);
  try
    // header - see https://www.w3.org/Protocols/rfc1341/7_2_Multipart.html
    NewBound;
    //MultiPartContentType := 'Content-Type: multipart/form-data; boundary='+bound;
    MultiPartContentType := 'multipart/form-data; boundary='+bound;

    for i := 0 to len-1 do
    with MultiPart[i] do
    begin
      if FileName='' then
        W.Add('--%'#13#10'Content-Disposition: form-data; name="%"'#13#10+
          'Content-Type: %'#13#10#13#10'%'#10'--%'#13#10,
          [bound,Name,ContentType,Content,bound])
      else
      begin
        // if this is the first file, create the header for files
        if filescount=0 then
        begin
          if i>0 then NewBound;

          W.Add('Content-Disposition: form-data; name="files"'#13#10+
            'Content-Type: multipart/mixed; boundary=%'#13#10#13#10,[bound]);
        end;
        inc(filescount);
        W.Add('--%'#13#10'Content-Disposition: form-data; name="%" filename="%"'#13#10+
          'Content-Type: %'#13#10,[bound, Name, FileName,MultiPartContentType]);
//        W.Add('--%'#13#10'Content-Disposition: file; filename="%"'#13#10+
//          'Content-Type: %'#13#10,[bound,FileName,ContentType]);
        if Encoding<>'' then
          W.Add('Content-Transfer-Encoding: %'#13#10,[Encoding]);
        W.AddCR;
        W.AddString(MultiPart[i].Content);
        W.Add(#13#10'--%'#13#10,[bound]);
      end;
    end;
    // footer multipart
    for i := boundcount-1 downto 0 do
      W.Add('--%--'#13#10, [boundaries[i]]);
    W.SetText(MultiPartContent);
    result := True;
  finally
    W.Free;
  end;
end;

　　

var
  part: SynCommons.TMultiPart;
  parts: SynCommons.TMultiPartDynArray;
  sFile, fileName : string;
  fs: Tfilestream;
  rs: TRawByteStringStream;
  data, ContentType : RawUTF8;
begin
  //打开文件
  if not OpenDialog1.Execute then Exit;

  sFile := OpenDialog1.FileName;
  fileName := AnsiToUtf8(ExtractFileName(sFile));
  try
    fs := Tfilestream.Create(sFile, fmOpenRead);
    rs := TRawByteStringStream.Create;
    rs.CopyFrom(fs, fs.Size);
    SetLength(parts, 1);
    part.ContentType := 'multipart/form-data;boundary=';
    part.Name := 'xssjdb';
    part.FileName := fileName;//文件名,上传至服务端的文件名,一般是原文件名，可以是别名
    part.Content := rs.DataString; //文件内容
    parts[0] := part;
    //添加参数, 服务端以request的query参数接收。与普通参数一样
    syncommons.MultiPartFormDataAddField('filename', fileName, parts);
    SynCommons.MultiPartFormDataEncode(parts, ContentType, data);

  finally
    rs.Free;
    fs.Free;
  end;
  if  http.Post('访问的地址url', data, ContentType) = 200 then
  begin
    //Memo1.Lines.Add(Utf8ToAnsi(http.Content));
  end;
end;