Delphi 多部分/表单数据请求的Indy MIME解码返回尾部CR/LF
Indy 10.6修订版5128似乎包含了一个更改,它打破了以下HTTP表单上传的代码 接收到的数据在末尾包含两个附加字节,即CR/LF对 阅读5127和5128之间更改的代码行并没有找到根本原因 当我找到时间并将结果发布在这里时,我将尝试调试它(但可能有人更快) 这是一个独立的演示应用程序,它在Delphi 多部分/表单数据请求的Indy MIME解码返回尾部CR/LF,delphi,http,indy,multipartform-data,Delphi,Http,Indy,Multipartform Data,Indy 10.6修订版5128似乎包含了一个更改,它打破了以下HTTP表单上传的代码 接收到的数据在末尾包含两个附加字节,即CR/LF对 阅读5127和5128之间更改的代码行并没有找到根本原因 当我找到时间并将结果发布在这里时,我将尝试调试它(但可能有人更快) 这是一个独立的演示应用程序,它在http://127.0.0.1:8080 program IndyMultipartUploadDemo; {$APPTYPE CONSOLE} uses IdHTTPServer, IdCu
http://127.0.0.1:8080
program IndyMultipartUploadDemo;
{$APPTYPE CONSOLE}
uses
IdHTTPServer, IdCustomHTTPServer, IdContext, IdSocketHandle, IdGlobal,
IdMessageCoder, IdGlobalProtocols, IdMessageCoderMIME, IdMultiPartFormData,
SysUtils, Classes;
type
TMimeHandler = procedure(var VDecoder: TIdMessageDecoder;
var VMsgEnd: Boolean; const Response: TIdHTTPResponseInfo) of object;
TMyServer = class(TIdHTTPServer)
private
procedure ProcessMimePart(var VDecoder: TIdMessageDecoder;
var VMsgEnd: Boolean; const Response: TIdHTTPResponseInfo);
function IsHeaderMediaType(const AHeaderLine, AMediaType: String): Boolean;
function MediaTypeMatches(const AValue, AMediaType: String): Boolean;
function GetUploadFolder: string;
procedure HandleMultipartUpload(Request: TIdHTTPRequestInfo; Response:
TIdHTTPResponseInfo; MimeHandler: TMimeHandler);
public
procedure InitComponent; override;
procedure DoCommandGet(AContext: TIdContext;
ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo); override;
end;
procedure Demo;
var
Server: TMyServer;
begin
ReportMemoryLeaksOnShutdown := True;
Server := TMyServer.Create;
try
try
Server.Active := True;
except
on E: Exception do
begin
WriteLn(E.ClassName + ' ' + E.Message);
end;
end;
WriteLn('Hit any key to terminate.');
ReadLn;
finally
Server.Free;
end;
end;
procedure TMyServer.InitComponent;
var
Binding: TIdSocketHandle;
begin
inherited;
Bindings.Clear;
Binding := Bindings.Add;
Binding.IP := '127.0.0.1';
Binding.Port := 8080;
KeepAlive := True;
end;
procedure TMyServer.DoCommandGet(AContext: TIdContext;
ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo);
begin
AResponseInfo.ContentType := 'text/html';
AResponseInfo.CharSet := 'UTF-8';
if ARequestInfo.CommandType = hcGET then
begin
AResponseInfo.ContentText :=
'<!DOCTYPE HTML>' + #13#10
+ '<html>' + #13#10
+ ' <head>' + #13#10
+ ' <title>Multipart Upload Example</title>' + #13#10
+ ' </head>' + #13#10
+ ' <body> ' + #13#10
+ ' <form enctype="multipart/form-data" method="post">' + #13#10
+ ' <fieldset>' + #13#10
+ ' <legend>Standard file upload</legend>' + #13#10
+ ' <label>File input</label>' + #13#10
+ ' <input type="file" class="input-file" name="upload" />' + #13#10
+ ' <button type="submit" class="btn btn-default">Upload</button>' + #13#10
+ ' </fieldset>' + #13#10
+ ' </form>' + #13#10
+ ' </body>' + #13#10
+ '</html>' + #13#10;
end
else
begin
if ARequestInfo.CommandType = hcPOST then
begin
if IsHeaderMediaType(ARequestInfo.ContentType, 'multipart/form-data') then
begin
HandleMultipartUpload(ARequestInfo, AResponseInfo, ProcessMimePart);
end;
end;
end;
end;
// based on code on the Indy and Winsock Forum articles
// http://forums2.atozed.com/viewtopic.php?f=7&t=10924
// http://embarcadero.newsgroups.archived.at/public.delphi.internet.winsock/201107/1107276163.html
procedure TMyServer.ProcessMimePart(var VDecoder: TIdMessageDecoder;
var VMsgEnd: Boolean; const Response: TIdHTTPResponseInfo);
var
LMStream: TMemoryStream;
LNewDecoder: TIdMessageDecoder;
UploadFile: string;
begin
LMStream := TMemoryStream.Create;
try
LNewDecoder := VDecoder.ReadBody(LMStream, VMsgEnd);
if VDecoder.Filename <> '' then
begin
try
LMStream.Position := 0;
Response.ContentText := Response.ContentText
+ Format('<p>%s %d bytes</p>' + #13#10,
[VDecoder.Filename, LMStream.Size]);
// write stream to upload folder
UploadFile := GetUploadFolder + VDecoder.Filename;
LMStream.SaveToFile(UploadFile);
Response.ContentText := Response.ContentText
+ '<p>' + UploadFile + ' written</p>';
except
LNewDecoder.Free;
raise;
end;
end;
VDecoder.Free;
VDecoder := LNewDecoder;
finally
LMStream.Free;
end;
end;
function TMyServer.IsHeaderMediaType(const AHeaderLine, AMediaType: String): Boolean;
begin
Result := MediaTypeMatches(ExtractHeaderItem(AHeaderLine), AMediaType);
end;
function TMyServer.MediaTypeMatches(const AValue, AMediaType: String): Boolean;
begin
if Pos('/', AMediaType) > 0 then begin
Result := TextIsSame(AValue, AMediaType);
end else begin
Result := TextStartsWith(AValue, AMediaType + '/');
end;
end;
function TMyServer.GetUploadFolder: string;
begin
Result := ExtractFilePath(ParamStr(0)) + 'upload\';
ForceDirectories(Result);
end;
procedure TMyServer.HandleMultipartUpload(Request: TIdHTTPRequestInfo;
Response: TIdHTTPResponseInfo; MimeHandler: TMimeHandler);
var
LBoundary, LBoundaryStart, LBoundaryEnd: string;
LDecoder: TIdMessageDecoder;
LLine: string;
LBoundaryFound, LIsStartBoundary, LMsgEnd: Boolean;
begin
LBoundary := ExtractHeaderSubItem(Request.ContentType, 'boundary',
QuoteHTTP);
if LBoundary = '' then
begin
Response.ResponseNo := 400;
Response.CloseConnection := True;
Response.WriteHeader;
Exit;
end;
LBoundaryStart := '--' + LBoundary;
LBoundaryEnd := LBoundaryStart + '--';
LDecoder := TIdMessageDecoderMIME.Create(nil);
try
TIdMessageDecoderMIME(LDecoder).MIMEBoundary := LBoundary;
LDecoder.SourceStream := Request.PostStream;
LDecoder.FreeSourceStream := False;
LBoundaryFound := False;
LIsStartBoundary := False;
repeat
LLine := ReadLnFromStream(Request.PostStream, -1, True);
if LLine = LBoundaryStart then
begin
LBoundaryFound := True;
LIsStartBoundary := True;
end
else if LLine = LBoundaryEnd then
begin
LBoundaryFound := True;
end;
until LBoundaryFound;
if (not LBoundaryFound) or (not LIsStartBoundary) then
begin
Response.ResponseNo := 400;
Response.CloseConnection := True;
Response.WriteHeader;
Exit;
end;
LMsgEnd := False;
repeat
TIdMessageDecoderMIME(LDecoder).MIMEBoundary := LBoundary;
LDecoder.SourceStream := Request.PostStream;
LDecoder.FreeSourceStream := False;
LDecoder.ReadHeader;
case LDecoder.PartType of
mcptText, mcptAttachment:
begin
MimeHandler(LDecoder, LMsgEnd, Response);
end;
mcptIgnore:
begin
LDecoder.Free;
LDecoder := TIdMessageDecoderMIME.Create(nil);
end;
mcptEOF:
begin
LDecoder.Free;
LMsgEnd := True;
end;
end;
until (LDecoder = nil) or LMsgEnd;
finally
LDecoder.Free;
end;
end;
begin
Demo;
end.
程序IndyMultipartUploadDemo;
{$APPTYPE控制台}
使用
IdHTTPServer、IdCustomHTTPServer、IdContext、IdSocketHandle、IdGlobal、,
IdMessageCoder、IdGlobalProtocols、IdMessageCoderMIME、IdMultiPartFormData、,
系统、类;
类型
TMimeHandler=过程(var VDecoder:TIdMessageDecoder;
var VMsgEnd:Boolean;const-Response:TIdHTTPResponseInfo)对象;
TMyServer=class(TIdHTTPServer)
私有的
过程过程mimepart(var-VDecoder:TIdMessageDecoder;
var VMsgEnd:Boolean;const-Response:TIdHTTPResponseInfo);
函数IsHeaderMediaType(const AHeaderLine,AMediaType:String):布尔值;
函数MediaTypeMatches(const AValue,AMediaType:String):布尔值;
函数GetUploadFolder:string;
过程HandleMultipartUpload(请求:TIdHTTPRequestInfo;响应:
TIdHTTPResponseInfo;MimeHandler:TMimeHandler);
公众的
程序初始化组件;推翻
过程DoCommandGet(AContext:TIdContext;
ARequestInfo:TIdHTTPRequestInfo;AResponseInfo:TIdHTTPResponseInfo);推翻
结束;
程序演示;
变量
服务器:TMyServer;
开始
ReportMemoryLeaksOnShutdown:=True;
服务器:=TMyServer.Create;
尝试
尝试
Server.Active:=True;
除了
关于E:Exception-do
开始
WriteLn(E.ClassName+“”+E.Message);
结束;
结束;
WriteLn('按任意键终止');
ReadLn;
最后
免费服务器;
结束;
结束;
程序TMyServer.InitComponent;
变量
装订:三折;
开始
继承;
绑定。清晰;
绑定:=绑定。添加;
Binding.IP:=“127.0.0.1”;
绑定端口:=8080;
KeepAlive:=真;
结束;
过程TMyServer.DoCommandGet(AContext:TIdContext;
ARequestInfo:TIdHTTPRequestInfo;AResponseInfo:TIdHTTPResponseInfo);
开始
AResponseInfo.ContentType:=“文本/html”;
AResponseInfo.CharSet:=“UTF-8”;
如果ARequestInfo.CommandType=hcGET,则
开始
AResponseInfo.ContentText:=
'' + #13#10
+ '' + #13#10
+ ' ' + #13#10
+“多部分上传示例”+#13#10
+ ' ' + #13#10
+ ' ' + #13#10
+ ' ' + #13#10
+ ' ' + #13#10
+“标准文件上传”+#13#10
+“文件输入”+#13#10
+ ' ' + #13#10
+“上传”+#13#10
+ ' ' + #13#10
+ ' ' + #13#10
+ ' ' + #13#10
+ '' + #13#10;
结束
其他的
开始
如果ARequestInfo.CommandType=hcPOST,则
开始
如果IsHeaderMediaType(ARequestInfo.ContentType,“多部分/表单数据”),则
开始
HandleMultipartUpload(ARequestInfo、AResponseInfo、ProcessMimePart);
结束;
结束;
结束;
结束;
//基于Indy和Winsock论坛文章上的代码
// http://forums2.atozed.com/viewtopic.php?f=7&t=10924
// http://embarcadero.newsgroups.archived.at/public.delphi.internet.winsock/201107/1107276163.html
过程TMyServer.ProcessMimePart(var-VDecoder:TIdMessageDecoder;
var VMsgEnd:Boolean;const-Response:TIdHTTPResponseInfo);
变量
LMStream:tmemorestream;
LNewDecoder:TIdMessageDecoder;
上传文件:字符串;
开始
LMStream:=TMemoryStream.Create;
尝试
LNewDecoder:=VDecoder.ReadBody(LMStream,VMsgEnd);
如果VDecoder.Filename为“”,则
开始
尝试
LMStream.Position:=0;
Response.ContentText:=Response.ContentText
+格式('%s%d字节'+#13#10,
[VDecoder.Filename,LMStream.Size]);
//将流写入上载文件夹
UploadFile:=GetUploadFolder+VDecoder.Filename;
LMStream.SaveToFile(上传文件);
Response.ContentText:=Response.ContentText
+“”+上传文件+”写入“”;
除了
LNewDecoder.Free;
提高;
结束;
结束;
VDecoder.Free;
VDecoder:=LNewDecoder;
最后
LMStream.Free;
结束;
结束;
函数TMyServer.ishaderMediaType(常量AHeaderLine,AMediaType:String):布尔值;
开始
结果:=MediaTypeMatches(ExtractHeaderItem(AHeaderLine),AMediaType);
结束;
函数TMyServer.MediaTypeMatches(const AValue,AMediaType:String):布尔值;
开始
如果Pos('/',AMediaType)>0,则开始
结果:=textisame(AValue,ameditype);
结束,否则开始
结果:=TextStartsWith(AValue,AMediaType+'/');
结束;
结束;
函数TMyServer.GetUploadFolder:string;
开始
结果:=ExtractFilePath(ParamStr(0))+“upload\”;
结果;;
结束;
过程TMyServer.HandleMultipartUpload(请求:TIdHTTPRequestInfo;
响应:TIdHTTPResponseInfo;MimeHandler:TMimeHandler);
变量
LBoundary,LBoundaryStart,LBoundaryEnd:字符串;
LDecoder:TIdMessageDecoder;
莉莲:弦;
LBoundaryFound,LIsStartBoundary,LMsgEnd:Boolean;
开始
LBoundary:=ExtractHeaderSubItem(Request.ContentType,'boundary',
QuoteHTTP);
如果LBoundary='',则
开始
Response.ResponseNo:=400;
Response.CloseConnection:=True;
Response.WriteHeader;
出口
结束;
LBoundaryStart:='--'+LBoundary;
LBoundaryEnd:=LBoundaryStart+'--';
LDecoder:=TIdMessageDecoderMIME.Create(无);
尝试
TIdMessageDecoderMIME(LDecoder).MIMEBoundary:=LBoundary;
ldeconder.SourceStream:=Request.PostStream;
ldeconder.FreeSourceStream:=False;
LBoundaryFound:=False;
LIsStartBoundary:=False;
重复
LLine:=ReadLnFromStream(Request.PostStream,-1,True);
如果LLine=LBoundaryStart,则
开始
LBoundaryFound:=真;
LIsStartBoundary:=
if LContentTransferEncoding = '' then begin
// RLebeau 04/08/2014: According to RFC 2045 Section 6.1:
// "Content-Transfer-Encoding: 7BIT" is assumed if the
// Content-Transfer-Encoding header field is not present."
if IsHeaderMediaType(LContentType, 'application/mac-binhex40') then begin {Do not Localize}
LContentTransferEncoding := 'binhex40'; {do not localize}
end
// START FIX!!
else if IsHeaderMediaType(LContentType, 'application/octet-stream') then begin {Do not Localize}
LContentTransferEncoding := '8bit'; {do not localize}
end
// END FIX!!
else begin
LContentTransferEncoding := '7bit'; {do not localize}
end;
end
TIdMessageDecoderMIME(decoder).Headers.Values['Content-Transfer-Encoding'] := '8bit';
TIdMessageDecoderMIME(decoder).BodyEncoded := False;
newdecoder := Decoder.ReadBody(ms,msgEnd);