Работа с WebDAV Яндекс диска на Delphi. Часть 2(собственно в этой части все и изложенно).

04.05.2016 /

Delphi

В статье рассмотрено работа с сервисами Яндекс диска с помощью Delphi и библиотеки Synapse, исходники будут написаны в Delphi XE6.

Во второй части рассматривается уже сама работа с Янднес диском

Доброго времени суток уважаемый читатель. Прошло уже более полугода как я написал первую часть, вторая часть собственно была готова еще тогда но начались какие-то проблемы и неприятности… но не будем блудословить и начнем заниматься делом т.е. разбором работы с яндекс диском используя Delphi и библиотеки senapse. Сразу хочу выразить огромную признательность сайту и , а также разделу справка яндекс диска, именно блягадоря я и написал маленькое тестовое приложение работающие с яндекс диском, а дальше была написанна утилита резервного копирования БД 1С на яндекс диск.

Сначала я выложу весь код модуля содержащего процедуры и функции для работы с яндекс диском, а потом я попытаюсь объяснить назначение процедур и функций данного модуля, и в самом конце я прекреплю пример откомпелированое приложения для работы с яндекс диском.

unit webDAV;

interface

uses Classes, SysUtils, httpsend, synacode, ssl_openssl, synautil, httpapp,
     XMLDoc, XMLIntf, Generics.Collections, Winapi.Windows, Winapi.Messages,
     Vcl.ComCtrls;

const
  cWebDAVServer = 'https://webdav.yandex.ru/';

type
  TWDResource = class
  private
    FHref         : string;
    FStatusCode   : integer;
    FContentLength: int64;
    FCreationDate : TDateTime;
    FLastmodified : TDateTime;
    FDisplayName  : string;
    FContentType  : string;
    FCollection   : Boolean;
  public
    property StatusCode   : integer read FStatusCode;
    property ContentLength: int64 read FContentLength;
    property CreationDate : TDateTime read FCreationDate;
    property Lastmodified : TDateTime read FLastmodified;
    property DisplayName  : string read FDisplayName;
    property ContentType  : string read FContentType;
    property Href: string read FHref;
    property Collection   : Boolean read FCollection;
end;

TWDResourceList = class(TList<TWDResource>)
public
  constructor Create;
  destructor Destroy;override;
  procedure Clear;
end;

type
  TWebDAVSend = class
  private
    FHTTP : THTTPSend;
    FToken: AnsiString;
    FPassword: string;
    FLogin: string;
    FCurDir : string;
    FResources: TWDResourceList;
    procedure SetLogin(const Value: string);
    procedure SetPassword(const Value: string);
    procedure SetToken;
    procedure ParseResources(const AXMLStr: string);
    function GetRequestURL(const Element: string; EncodePath:boolean=True): string;
    function EncodeUTF8URI(const URI: string): string;
    function PROPFIND(Depth: integer; const Element: String; errToDisplay : boolean = false): string;

  public
    constructor Create;
    destructor Destroy; override;
    property Login: string read FLogin write SetLogin;
    property Password: string read FPassword write SetPassword;
    property Resources: TWDResourceList read FResources;
    property CurDir : string read FCurDir;

    function GetData(DAVDir : string; errToDisplay : boolean = false): TListview;
    function PUT(const ElementHref: string; aFileName: string; errToDisplay : boolean = false): boolean;
    function MKCOL(const ElementPath: string; errToDisplay : boolean = false): boolean;
    function Get(const ElementHref: string; var Response:TStream; errToDisplay : boolean = false): boolean;
    function DAVDelete(const ElementPath: string; errToDisplay : boolean = false): boolean;
  end;
//==================================================================


implementation

uses DateUtils;

resourcestring
  rsPropfindError = 'Ошибка при выполнении запроса PROPFIND';

procedure SaveErrFile(errStr : string);
var
 ErrFile : string;
 f : TextFile;
begin
 ErrFile := ExtractFileDir(ExtractFilePath(ParamStr(0))) + '\error.log';
 AssignFile(f, ErrFile);
if not FileExists(ErrFile) then
 begin
  Rewrite(f);
  CloseFile(f);
 end;
 Append(f);
 Writeln(f,  DateToStr(SysUtils.Date) +
            ' ' + TimeToStr(SysUtils.Time) + ' - ' + errStr );
 Flush(f);
 CloseFile(f);
end;

function GetFileSize(FileName: string): Int64;
var F: TMemoryStream;
begin
  try
    F:=TMemoryStream.Create;
    F.LoadFromFile(FileName);
    Result:=F.Size;
  finally
    F.Free;
  end;
end;

function TzSpecificLocalTimeToSystemTime(lpTimeZoneInformation: PTimeZoneInformation; var lpLocalTime, lpUniversalTime: TSystemTime): BOOL; stdcall;
  external kernel32 name 'TzSpecificLocalTimeToSystemTime';
{$EXTERNALSYM TzSpecificLocalTimeToSystemTime}

function SystemTimeToUTC(Sys: TDateTime): TDateTime;
var
  TimeZoneInf: _TIME_ZONE_INFORMATION;
  SysTime, LocalTime: TSystemTime;
begin
  if GetTimeZoneInformation(TimeZoneInf) < $FFFFFFFF then
  begin
    DatetimetoSystemTime(Sys, SysTime);
    if TzSpecificLocalTimeToSystemTime(@TimeZoneInf, SysTime, LocalTime) then
      Result := SystemTimeToDateTime(LocalTime)
    else
      Result := Sys;
  end
  else
    Result := Sys;
end;

function UTCToSystemTime(UTC: TDateTime): TDateTime;
var
  TimeZoneInf: _TIME_ZONE_INFORMATION;
  UTCTime, LocalTime: TSystemTime;
begin
  if GetTimeZoneInformation(TimeZoneInf) < $FFFFFFFF then
  begin
    DatetimetoSystemTime(UTC, UTCTime);
    if SystemTimeToTzSpecificLocalTime(@TimeZoneInf, UTCTime, LocalTime) then
    begin
      Result := SystemTimeToDateTime(LocalTime);
    end
    else
      Result := UTC;
  end
  else
    Result := UTC;
end;

function ISODateTime2UTC(const AValue: string; ADateOnly: Boolean = False): TDateTime;
var
  I, Len: Integer;
  DD, MM, YY: Word;
  HH, MN, SS, ZZ: Word;
  HH1, MN1: Integer;
  TimeOffsetSign: Char;
begin
  Len := Length(AValue);
  YY := StrToIntDef(copy(AValue, 1, 4), 0);
  I := 5;
  if (I <= Len) and (AValue[I] = '-') then
    inc(I);
  MM := StrToIntDef(copy(AValue, I, 2), 0);
  inc(I, 2);
  if (I <= Len) and (AValue[I] = '-') then
    inc(I);
  DD := StrToIntDef(copy(AValue, I, 2), 0);
  inc(I, 2);
  HH := 0;
  MN := 0;
  SS := 0;
  ZZ := 0;
  if not ADateOnly and (I <= Len) and (AValue[I] = 'T') then
  begin
    inc(I);
    HH := StrToIntDef(copy(AValue, I, 2), 0);
    inc(I, 2);
    if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then
    begin
      if AValue[I] = ':' then
        inc(I);
      MN := StrToIntDef(copy(AValue, I, 2), 0);
      inc(I, 2);
      if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then
      begin
        if AValue[I] = ':' then
          inc(I);
        SS := StrToIntDef(copy(AValue, I, 2), 0);
        inc(I, 2);
        if (I <= Len) and (AValue[I] = '.') then
        begin
          inc(I);
          ZZ := StrToIntDef(copy(AValue, I, 3), 0);
          inc(I, 3);
        end;
      end;
    end;
  end;
  Result := EncodeDateTime(YY, MM, DD, HH, MN, SS, ZZ);
  if ADateOnly then
    Exit;
  if (I <= Len) and CharInSet(AValue[I], ['Z', '+', '-']) then
  begin
    if AValue[I] <> 'Z' then
    begin
      TimeOffsetSign := AValue[I];
      inc(I);
      HH1 := StrToIntDef(copy(AValue, I, 2), 0);
      inc(I, 2);
      if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then
      begin
        if AValue[I] = ':' then
          inc(I);
        MN1 := StrToIntDef(copy(AValue, I, 2), 0);
      end
      else
        MN1 := 0;
      if TimeOffsetSign = '+' then
      begin
        HH1 := -HH1;
        MN1 := -MN1;
      end;
      Result := IncHour(Result, HH1);
      Result := IncMinute(Result, MN1);
    end;
  end
  else Result := SystemTimeToUTC(Result);
end;


constructor TWebDAVSend.Create;
begin
  inherited;
  FHTTP := THTTPSend.Create;
  FResources := TWDResourceList.Create;
end;

destructor TWebDAVSend.Destroy;
begin
  FHTTP.Free;
  FResources.Free;
  inherited;
end;

procedure TWebDAVSend.SetToken;
begin
  FToken:=EncodeBase64(FLogin+':'+FPassword);
end;

procedure TWebDAVSend.SetLogin(const Value: string);
begin
  FLogin := Value;
  SetToken;
end;

procedure TWebDAVSend.SetPassword(const Value: string);
begin
  FPassword := Value;
  SetToken;
end;

function TWebDAVSend.EncodeUTF8URI(const URI: string): string;
var
  i: integer;
  Char: AnsiChar;
begin
  result := '';
  for i := 1 to length(URI) do
  begin
    if not(URI[i] in URLFullSpecialChar) then
      begin
      for Char in UTF8String(URI[i]) do
        Result:=Result+'%'+IntToHex(Ord(Char), 2)
      end
    else
      Result:=Result+URI[i];
  end;
end;

function TWebDAVSend.GetRequestURL(const Element: string; EncodePath:boolean): string;
var URI: string;
begin
  if Length(Element)>0 then
    begin
      URI:=Element;
      if URI[1]='/' then
        Delete(URI,1,1);
      if EncodePath then
        Result:=cWebDAVServer+EncodeUTF8URI(URI)
      else
        Result:=cWebDAVServer+URI
    end
  else
   Result:=cWebDAVServer;
end;

//чтение содержимого каталога


//*********************************************************************
procedure TWebDAVSend.ParseResources(const AXMLStr: string);
var XMLDoc: IXMLDocument;
    ResponseNode,ChildNode,PropNodeChild, PropertyNode: IXMLNode;
     s, su,Value: string;
begin
  XMLDoc:=TXMLDocument.Create(nil);
  try
    XMLDoc.LoadFromXML(AXMLStr);
    if not XMLDoc.IsEmptyDoc then
      begin
        ResponseNode:=XMLDoc.DocumentElement.ChildNodes.First;
        while Assigned(ResponseNode) do
          begin
            FResources.Add(TWDResource.Create);
            ChildNode:=ResponseNode.ChildNodes.First;
            while Assigned(ChildNode) do
              begin
                if ChildNode.NodeName='d:href' then
//                   FResources.Last.FHref:=ChildNode.Text
                   FResources.Last.FHref:=Utf8ToAnsi(ChildNode.Text)

                else
                  if ChildNode.NodeName='d:propstat' then
                    begin
                      PropNodeChild:=ChildNode.ChildNodes.First;
                      while Assigned(PropNodeChild) do
                        begin
                          if PropNodeChild.NodeName='d:status' then
                            begin
                              Value:=PropNodeChild.Text;
                              s := Trim(SeparateRight(Value, ' '));
                              su := Trim(SeparateLeft(s, ' '));
                              FResources.Last.FStatusCode:=StrToIntDef(su, 0);
                            end
                          else
                            if PropNodeChild.NodeName='d:prop' then
                              begin
                                PropertyNode:=PropNodeChild.ChildNodes.First;
                                while Assigned(PropertyNode) do
                                  begin
                                    if PropertyNode.NodeName='d:creationdate' then
                                      FResources.Last.FCreationDate := UTCToSystemTime(ISODateTime2UTC(PropertyNode.Text))
                                    else
                                      if PropertyNode.NodeName='d:displayname' then
                                        FResources.Last.FDisplayName:=Utf8ToAnsi(PropertyNode.Text)
                                      else
                                        if PropertyNode.NodeName='d:getcontentlength' then
                                          FResources.Last.FContentLength:=PropertyNode.NodeValue
                                        else
                                          if PropertyNode.NodeName='d:getlastmodified' then
                                            FResources.Last.FLastmodified:=DecodeRfcDateTime(PropertyNode.Text)
                                          else
                                            if PropertyNode.NodeName='d:resourcetype' then
                                              FResources.Last.FCollection:=PropertyNode.ChildNodes.Count > 0;
                                    PropertyNode:=PropertyNode.NextSibling;
                                  end;
                              end;
                          PropNodeChild:=PropNodeChild.NextSibling;
                        end;
                    end;
                ChildNode:=ChildNode.NextSibling;
              end;
            ResponseNode:=ResponseNode.NextSibling;
          end;
      end;
  finally
    XMLDoc:=nil;
  end;
end;

function TWebDAVSend.GetData(DAVDir : string; errToDisplay : boolean): TListView;
var
 Str: string;
 lvl : byte;
begin

  FResources.Clear;
  lvl := 1;

//  Str:= PROPFIND(1, InputBox('Ресурс', 'Ресурс', ''));

  str := PROPFIND(lvl, DAVDir, errToDisplay);

  if (Length(Trim(Str)) > 0) then
   begin
      ParseResources(Str);
      FCurDir := DAVDir;
   end;

end;

//************************ Чтение содержимого каталога ********************
function TWebDAVSend.PROPFIND(Depth: integer; const Element: String;
                              errToDisplay : boolean): string;
begin
  with FHTTP do
  begin
    Headers.Clear;
    Document.Clear;
    Headers.Add('Authorization: Basic ' + FToken);
    Headers.Add('Depth: ' + IntToStr(Depth));
    Headers.Add('Accept: */*');
    if HTTPMethod('PROPFIND', GetRequestURL(Element)) then
      result := ReadStrFromStream(Document, Document.Size)
    else
     if errToDisplay then
       raise Exception.Create(rsPropfindError+' '+ResultString)
      else
       SaveErrFile(rsPropfindError+' '+ResultString + ' (PROPFIND' + Element + ')');
  end;
end;
//************************ Создание папки *********************************
function TWebDAVSend.MKCOL(const ElementPath: string; errToDisplay : boolean): boolean;
begin
  Result:=False;
  with FHTTP do
  begin
    Headers.Clear;
    Document.Clear;
    Headers.Add('Authorization: Basic ' + FToken);
    Headers.Add('Accept: */*');
    if HTTPMethod('MKCOL', GetRequestURL(ElementPath)) then
      begin
        Result:=ResultCode=201;
        if not Result then
         if errToDisplay then
           raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)
          else
           SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (MKCOL ' + ElementPath + ')');
      end
    else
     if errToDisplay then
       raise Exception.Create(rsPropfindError+' '+ResultString + ' (MKCOL ' + ElementPath + ')')
      else
       SaveErrFile(rsPropfindError+' '+ResultString);
  end;
end;
//************************ скачивание с яндекс дтска***********************
function TWebDAVSend.Get(const ElementHref: string; var Response:TStream;
                         errToDisplay : boolean): boolean;
var URL: string;
begin
  if not Assigned(Response) then Exit;
  URL:=GetRequestURL(ElementHref, false);
  with FHTTP do
  begin
    Headers.Clear;
    Document.Clear;
    Headers.Add('Authorization: Basic ' + FToken);
    Headers.Add('Accept: */*');
    if HTTPMethod('GET', URL) then
      begin
        Result:=ResultCode=200;
        if not Result then
         begin
          if errToDisplay then
            raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)
           else
            SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (GET ' + ElementHref + ')');
         end
        else
          Document.SaveToStream(Response);
      end
    else
     if errToDisplay then
       raise Exception.Create(rsPropfindError+' '+ResultString)
      else
       SaveErrFile(rsPropfindError+' '+ResultString + ' (GET ' + ElementHref + ')');
  end;
end;
//-------------------------- загрузкам на яндекс диск-----------------------
function TWebDAVSend.PUT(const ElementHref: string; aFileName: string;
                         errToDisplay : boolean): boolean;
var
  s : TStream;
  st : String;
  fLength : int64;
begin
 s := TFileStream.Create(aFileName,fmOpenRead);
 fLength := s.Size;
 with FHTTP do
  begin
   Headers.Clear;
   Document.Clear;
   Headers.Add('Authorization: Basic ' + FToken);
   Headers.Add('Accept: */*');
   Document.LoadFromStream(s);
   Headers.Add('Expect: 100-continue');
   Headers.Add('Content-Type: application/binary');
//   Headers.Add('Content-Length: ' + intToStr(fLength));     //
   if HTTPMethod('PUT', GetRequestURL(ElementHref)) then
     begin
      result:=ResultCode=201;
      if not Result then
       if errToDisplay then
         raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)
        else
         SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (PUT ' + ElementHref + ')');
     end
    else
     if errToDisplay then
       raise Exception.Create(rsPropfindError+' '+ResultString + ' (PUT ' + ElementHref + ')')
      else
       SaveErrFile(rsPropfindError+' '+ResultString);
  end;
 s.Free;
end;
//----------------------------- удаление файла/папки ---------------------------
function TWebDAVSend.DAVDelete(const ElementPath: string; errToDisplay : boolean): boolean;
begin
  Result:=False;
  with FHTTP do
  begin
    Headers.Clear;
    Document.Clear;
    Headers.Add('Authorization: Basic ' + FToken);
    Headers.Add('Accept: */*');
    if HTTPMethod('DELETE', GetRequestURL(ElementPath)) then
      begin
        Result:=ResultCode=204;
        if not Result then
         if errToDisplay then
           raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)
          else
           SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (DELETE ' +
                       ElementPath  + ')');
      end
    else
     if errToDisplay then
       raise Exception.Create(rsPropfindError+' '+ResultString + ' (DELETE ' +
                       ElementPath  + ')')
      else
       SaveErrFile(rsPropfindError+' '+ResultString);
  end;
end;

{ TWDResourceList }
procedure TWDResourceList.Clear;
var i:integer;
begin
  for I := Count-1 downto 0 do
    Extract(Items[0]).Free;
  inherited Clear;
end;

constructor TWDResourceList.Create;
begin
  inherited Create;
end;

destructor TWDResourceList.Destroy;
begin
  Clear;
  inherited;
end;

end.

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unit webDAV;

interface

uses Classes, SysUtils, httpsend, synacode, ssl_openssl, synautil, httpapp,

XMLDoc, XMLIntf, Generics.Collections, Winapi.Windows, Winapi.Messages,

Vcl.ComCtrls;

const

cWebDAVServer = 'https://webdav.yandex.ru/';

type

TWDResource = class

private

FHref : string;

FStatusCode : integer;

FContentLength: int64;

FCreationDate : TDateTime;

FLastmodified : TDateTime;

FDisplayName : string;

FContentType : string;

FCollection : Boolean;

public

property StatusCode : integer read FStatusCode;

property ContentLength: int64 read FContentLength;

property CreationDate : TDateTime read FCreationDate;

property Lastmodified : TDateTime read FLastmodified;

property DisplayName : string read FDisplayName;

property ContentType : string read FContentType;

property Href: string read FHref;

property Collection : Boolean read FCollection;

end;

TWDResourceList = class(TList<TWDResource>)

public

constructor Create;

destructor Destroy;override;

procedure Clear;

end;

type

TWebDAVSend = class

private

FHTTP : THTTPSend;

FToken: AnsiString;

FPassword: string;

FLogin: string;

FCurDir : string;

FResources: TWDResourceList;

procedure SetLogin(const Value: string);

procedure SetPassword(const Value: string);

procedure SetToken;

procedure ParseResources(const AXMLStr: string);

function GetRequestURL(const Element: string; EncodePath:boolean=True): string;

function EncodeUTF8URI(const URI: string): string;

function PROPFIND(Depth: integer; const Element: String; errToDisplay : boolean = false): string;

public

constructor Create;

destructor Destroy; override;

property Login: string read FLogin write SetLogin;

property Password: string read FPassword write SetPassword;

property Resources: TWDResourceList read FResources;

property CurDir : string read FCurDir;

function GetData(DAVDir : string; errToDisplay : boolean = false): TListview;

function PUT(const ElementHref: string; aFileName: string; errToDisplay : boolean = false): boolean;

function MKCOL(const ElementPath: string; errToDisplay : boolean = false): boolean;

function Get(const ElementHref: string; var Response:TStream; errToDisplay : boolean = false): boolean;

function DAVDelete(const ElementPath: string; errToDisplay : boolean = false): boolean;

end;

//==================================================================

implementation

uses DateUtils;

resourcestring

rsPropfindError = 'Ошибка при выполнении запроса PROPFIND';

procedure SaveErrFile(errStr : string);

var

ErrFile : string;

f : TextFile;

begin

ErrFile := ExtractFileDir(ExtractFilePath(ParamStr(0))) + '\error.log';

AssignFile(f, ErrFile);

if not FileExists(ErrFile) then

begin

Rewrite(f);

CloseFile(f);

end;

Append(f);

Writeln(f, DateToStr(SysUtils.Date) +

' ' + TimeToStr(SysUtils.Time) + ' - ' + errStr );

Flush(f);

CloseFile(f);

end;

function GetFileSize(FileName: string): Int64;

var F: TMemoryStream;

begin

try

F:=TMemoryStream.Create;

F.LoadFromFile(FileName);

Result:=F.Size;

finally

F.Free;

end;

function TzSpecificLocalTimeToSystemTime(lpTimeZoneInformation: PTimeZoneInformation; var lpLocalTime, lpUniversalTime: TSystemTime): BOOL; stdcall;

external kernel32 name 'TzSpecificLocalTimeToSystemTime';

{$EXTERNALSYM TzSpecificLocalTimeToSystemTime}

function SystemTimeToUTC(Sys: TDateTime): TDateTime;

var

TimeZoneInf: _TIME_ZONE_INFORMATION;

SysTime, LocalTime: TSystemTime;

begin

if GetTimeZoneInformation(TimeZoneInf) < $FFFFFFFF then

begin

DatetimetoSystemTime(Sys, SysTime);

if TzSpecificLocalTimeToSystemTime(@TimeZoneInf, SysTime, LocalTime) then

Result := SystemTimeToDateTime(LocalTime)

else

Result := Sys;

end

else

Result := Sys;

end;

function UTCToSystemTime(UTC: TDateTime): TDateTime;

var

TimeZoneInf: _TIME_ZONE_INFORMATION;

UTCTime, LocalTime: TSystemTime;

begin

if GetTimeZoneInformation(TimeZoneInf) < $FFFFFFFF then

begin

DatetimetoSystemTime(UTC, UTCTime);

if SystemTimeToTzSpecificLocalTime(@TimeZoneInf, UTCTime, LocalTime) then

begin

Result := SystemTimeToDateTime(LocalTime);

end

else

Result := UTC;

end

else

Result := UTC;

end;

function ISODateTime2UTC(const AValue: string; ADateOnly: Boolean = False): TDateTime;

var

I, Len: Integer;

DD, MM, YY: Word;

HH, MN, SS, ZZ: Word;

HH1, MN1: Integer;

TimeOffsetSign: Char;

begin

Len := Length(AValue);

YY := StrToIntDef(copy(AValue, 1, 4), 0);

I := 5;

if (I <= Len) and (AValue[I] = '-') then

inc(I);

MM := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

if (I <= Len) and (AValue[I] = '-') then

inc(I);

DD := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

HH := 0;

MN := 0;

SS := 0;

ZZ := 0;

if not ADateOnly and (I <= Len) and (AValue[I] = 'T') then

begin

inc(I);

HH := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then

begin

if AValue[I] = ':' then

inc(I);

MN := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then

begin

if AValue[I] = ':' then

inc(I);

SS := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

if (I <= Len) and (AValue[I] = '.') then

begin

inc(I);

ZZ := StrToIntDef(copy(AValue, I, 3), 0);

inc(I, 3);

end;

Result := EncodeDateTime(YY, MM, DD, HH, MN, SS, ZZ);

if ADateOnly then

Exit;

if (I <= Len) and CharInSet(AValue[I], ['Z', '+', '-']) then

begin

if AValue[I] <> 'Z' then

begin

TimeOffsetSign := AValue[I];

inc(I);

HH1 := StrToIntDef(copy(AValue, I, 2), 0);

inc(I, 2);

if (I <= Len) and CharInSet(AValue[I], [':', '0' .. '5']) then

begin

if AValue[I] = ':' then

inc(I);

MN1 := StrToIntDef(copy(AValue, I, 2), 0);

end

else

MN1 := 0;

if TimeOffsetSign = '+' then

begin

HH1 := -HH1;

MN1 := -MN1;

end;

Result := IncHour(Result, HH1);

Result := IncMinute(Result, MN1);

end;

end

else Result := SystemTimeToUTC(Result);

end;

constructor TWebDAVSend.Create;

begin

inherited;

FHTTP := THTTPSend.Create;

FResources := TWDResourceList.Create;

end;

destructor TWebDAVSend.Destroy;

begin

FHTTP.Free;

FResources.Free;

inherited;

end;

procedure TWebDAVSend.SetToken;

begin

FToken:=EncodeBase64(FLogin+':'+FPassword);

end;

procedure TWebDAVSend.SetLogin(const Value: string);

begin

FLogin := Value;

SetToken;

end;

procedure TWebDAVSend.SetPassword(const Value: string);

begin

FPassword := Value;

SetToken;

end;

function TWebDAVSend.EncodeUTF8URI(const URI: string): string;

var

i: integer;

Char: AnsiChar;

begin

result := '';

for i := 1 to length(URI) do

begin

if not(URI[i] in URLFullSpecialChar) then

begin

for Char in UTF8String(URI[i]) do

Result:=Result+'%'+IntToHex(Ord(Char), 2)

end

else

Result:=Result+URI[i];

end;

function TWebDAVSend.GetRequestURL(const Element: string; EncodePath:boolean): string;

var URI: string;

begin

if Length(Element)>0 then

begin

URI:=Element;

if URI[1]='/' then

Delete(URI,1,1);

if EncodePath then

Result:=cWebDAVServer+EncodeUTF8URI(URI)

else

Result:=cWebDAVServer+URI

end

else

Result:=cWebDAVServer;

end;

//чтение содержимого каталога

//*********************************************************************

procedure TWebDAVSend.ParseResources(const AXMLStr: string);

var XMLDoc: IXMLDocument;

ResponseNode,ChildNode,PropNodeChild, PropertyNode: IXMLNode;

s, su,Value: string;

begin

XMLDoc:=TXMLDocument.Create(nil);

try

XMLDoc.LoadFromXML(AXMLStr);

if not XMLDoc.IsEmptyDoc then

begin

ResponseNode:=XMLDoc.DocumentElement.ChildNodes.First;

while Assigned(ResponseNode) do

begin

FResources.Add(TWDResource.Create);

ChildNode:=ResponseNode.ChildNodes.First;

while Assigned(ChildNode) do

begin

if ChildNode.NodeName='d:href' then

// FResources.Last.FHref:=ChildNode.Text

FResources.Last.FHref:=Utf8ToAnsi(ChildNode.Text)

else

if ChildNode.NodeName='d:propstat' then

begin

PropNodeChild:=ChildNode.ChildNodes.First;

while Assigned(PropNodeChild) do

begin

if PropNodeChild.NodeName='d:status' then

begin

Value:=PropNodeChild.Text;

s := Trim(SeparateRight(Value, ' '));

su := Trim(SeparateLeft(s, ' '));

FResources.Last.FStatusCode:=StrToIntDef(su, 0);

end

else

if PropNodeChild.NodeName='d:prop' then

begin

PropertyNode:=PropNodeChild.ChildNodes.First;

while Assigned(PropertyNode) do

begin

if PropertyNode.NodeName='d:creationdate' then

FResources.Last.FCreationDate := UTCToSystemTime(ISODateTime2UTC(PropertyNode.Text))

else

if PropertyNode.NodeName='d:displayname' then

FResources.Last.FDisplayName:=Utf8ToAnsi(PropertyNode.Text)

else

if PropertyNode.NodeName='d:getcontentlength' then

FResources.Last.FContentLength:=PropertyNode.NodeValue

else

if PropertyNode.NodeName='d:getlastmodified' then

FResources.Last.FLastmodified:=DecodeRfcDateTime(PropertyNode.Text)

else

if PropertyNode.NodeName='d:resourcetype' then

FResources.Last.FCollection:=PropertyNode.ChildNodes.Count > 0;

PropertyNode:=PropertyNode.NextSibling;

end;

PropNodeChild:=PropNodeChild.NextSibling;

end;

ChildNode:=ChildNode.NextSibling;

end;

ResponseNode:=ResponseNode.NextSibling;

end;

finally

XMLDoc:=nil;

end;

function TWebDAVSend.GetData(DAVDir : string; errToDisplay : boolean): TListView;

var

Str: string;

lvl : byte;

begin

FResources.Clear;

lvl := 1;

// Str:= PROPFIND(1, InputBox('Ресурс', 'Ресурс', ''));

str := PROPFIND(lvl, DAVDir, errToDisplay);

if (Length(Trim(Str)) > 0) then

begin

ParseResources(Str);

FCurDir := DAVDir;

end;

//************************ Чтение содержимого каталога ********************

function TWebDAVSend.PROPFIND(Depth: integer; const Element: String;

errToDisplay : boolean): string;

begin

with FHTTP do

begin

Headers.Clear;

Document.Clear;

Headers.Add('Authorization: Basic ' + FToken);

Headers.Add('Depth: ' + IntToStr(Depth));

Headers.Add('Accept: */*');

if HTTPMethod('PROPFIND', GetRequestURL(Element)) then

result := ReadStrFromStream(Document, Document.Size)

else

if errToDisplay then

raise Exception.Create(rsPropfindError+' '+ResultString)

else

SaveErrFile(rsPropfindError+' '+ResultString + ' (PROPFIND' + Element + ')');

end;

//************************ Создание папки *********************************

function TWebDAVSend.MKCOL(const ElementPath: string; errToDisplay : boolean): boolean;

begin

Result:=False;

with FHTTP do

begin

Headers.Clear;

Document.Clear;

Headers.Add('Authorization: Basic ' + FToken);

Headers.Add('Accept: */*');

if HTTPMethod('MKCOL', GetRequestURL(ElementPath)) then

begin

Result:=ResultCode=201;

if not Result then

if errToDisplay then

raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)

else

SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (MKCOL ' + ElementPath + ')');

end

else

if errToDisplay then

raise Exception.Create(rsPropfindError+' '+ResultString + ' (MKCOL ' + ElementPath + ')')

else

SaveErrFile(rsPropfindError+' '+ResultString);

end;

//************************ скачивание с яндекс дтска***********************

function TWebDAVSend.Get(const ElementHref: string; var Response:TStream;

errToDisplay : boolean): boolean;

var URL: string;

begin

if not Assigned(Response) then Exit;

URL:=GetRequestURL(ElementHref, false);

with FHTTP do

begin

Headers.Clear;

Document.Clear;

Headers.Add('Authorization: Basic ' + FToken);

Headers.Add('Accept: */*');

if HTTPMethod('GET', URL) then

begin

Result:=ResultCode=200;

if not Result then

begin

if errToDisplay then

raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)

else

SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (GET ' + ElementHref + ')');

end

else

Document.SaveToStream(Response);

end

else

if errToDisplay then

raise Exception.Create(rsPropfindError+' '+ResultString)

else

SaveErrFile(rsPropfindError+' '+ResultString + ' (GET ' + ElementHref + ')');

end;

//-------------------------- загрузкам на яндекс диск-----------------------

function TWebDAVSend.PUT(const ElementHref: string; aFileName: string;

errToDisplay : boolean): boolean;

var

s : TStream;

st : String;

fLength : int64;

begin

s := TFileStream.Create(aFileName,fmOpenRead);

fLength := s.Size;

with FHTTP do

begin

Headers.Clear;

Document.Clear;

Headers.Add('Authorization: Basic ' + FToken);

Headers.Add('Accept: */*');

Document.LoadFromStream(s);

Headers.Add('Expect: 100-continue');

Headers.Add('Content-Type: application/binary');

// Headers.Add('Content-Length: ' + intToStr(fLength)); //

if HTTPMethod('PUT', GetRequestURL(ElementHref)) then

begin

result:=ResultCode=201;

if not Result then

if errToDisplay then

raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)

else

SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (PUT ' + ElementHref + ')');

end

else

if errToDisplay then

raise Exception.Create(rsPropfindError+' '+ResultString + ' (PUT ' + ElementHref + ')')

else

SaveErrFile(rsPropfindError+' '+ResultString);

end;

s.Free;

end;

//----------------------------- удаление файла/папки ---------------------------

function TWebDAVSend.DAVDelete(const ElementPath: string; errToDisplay : boolean): boolean;

begin

Result:=False;

with FHTTP do

begin

Headers.Clear;

Document.Clear;

Headers.Add('Authorization: Basic ' + FToken);

Headers.Add('Accept: */*');

if HTTPMethod('DELETE', GetRequestURL(ElementPath)) then

begin

Result:=ResultCode=204;

if not Result then

if errToDisplay then

raise Exception.Create(IntToStr(ResultCode)+' '+ResultString)

else

SaveErrFile(IntToStr(ResultCode)+' '+ResultString + ' (DELETE ' +

ElementPath + ')');

end

else

if errToDisplay then

raise Exception.Create(rsPropfindError+' '+ResultString + ' (DELETE ' +

ElementPath + ')')

else

SaveErrFile(rsPropfindError+' '+ResultString);

end;

{ TWDResourceList }

procedure TWDResourceList.Clear;

var i:integer;

begin

for I := Count-1 downto 0 do

Extract(Items[0]).Free;

inherited Clear;

end;

constructor TWDResourceList.Create;

begin

inherited Create;

end;

destructor TWDResourceList.Destroy;

begin

Clear;

inherited;

end;

end.

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Работа с WebDAV Яндекс диска на Delphi. Часть 2(собственно в этой части все и изложенно).

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