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| unit Scrapix.Core;
interface
uses
{Winapi}
WinApi.Windows, WinApi.Messages,
{System}
System.SysUtils, System.Classes, System.Generics.Collections,
System.RegularExpressions, System.Types, System.Net.HttpClient,
System.Net.URLClient, System.IOUtils, System.Threading, System.SyncObjs,
{Vcl}
Vcl.ComCtrls, Vcl.StdCtrls, Vcl.CheckLst, Vcl.Graphics,
{StyleControls VCL}
scControls,
{Translate.Core}
Translate.Core;
const
// États d'exploration
STATE_RUNNING = 0;
STATE_PAUSED = 1;
STATE_CANCEL = 2;
// User-Agent utilisé pour toutes les requêtes HTTP
UserAgent = 'Scrapix/1.0';
type
TScrapix = class
private
{ --- Données de suivi et compteurs --- }
VisitedLinks: TDictionary<string, Boolean>;
FFoundFiles: TDictionary<string, Boolean>;
FBrokenLinks: TDictionary<string, Boolean>;
TotalLinks: Integer;
FileCount: Integer;
BrokenCount: Integer;
FRobotsBlocked: Integer;
FLinksTraversed: Integer;
{ --- Contrôle d'exécution --- }
FState: Integer;
FPauseEvent: TEvent;
FStoppedEvent: TEvent;
{ --- Paramètres de crawl --- }
RequestTimeoutMs: Integer;
RequestDelayMs: Integer;
SameDomainOnly: Boolean;
RootDomain: string;
{ --- Téléchargement --- }
FAutoDownload: Boolean;
DownloadFolder: string;
{ --- Robots.txt --- }
RobotsRules: TDictionary<string, TStringList>;
FRespectRobots: Boolean;
{ --- Filtres de ressources --- }
FSearchImages: Boolean;
FSearchDocuments: Boolean;
FSearchAudio: Boolean;
FSearchVideo: Boolean;
FSearchWeb: Boolean;
{ --- Exécution courante --- }
FRunning: Boolean;
FMaxDepth: Integer;
{ --- Chemins de rapports temporaires --- }
FVisitedFilePath: string;
FBrokenFilePath: string;
FFoundFilePath: string;
FLogFilePath: string;
FLogLock: TCriticalSection;
FDisableUIUpdates: Boolean;
{ --- Limites configurables --- }
FFoundFilesLimit: Integer;
FExploreLimit: Integer;
{ --- Fonctions internes --- }
// Retourne true si les mises à jour UI sont autorisées
function UIUpdatesAllowed: Boolean;
// Récupère le contenu d'une URL via GET et met à jour le ListView (thread-safe)
function GetWebContent(const URL: string; ListView: TscListView;
Depth: Integer; Logging: TscListBox): string;
// Extrait les liens <a href="..."> et normalise les URL
procedure ExtractLinks(const HTML: string; BaseURL: string;
var LinkList: TStringList);
// Extrait sources médias (images, docs, audio, vidéo, ressources web) selon les flags actifs
procedure ExtractMediaSources(const HTML: string; BaseURL: string;
var ImageList, DocList, AudioList, VideoList, WebList: TStringList);
// Incrémente le compteur d'URL bloquées par robots.txt et met à jour le StatusBar
procedure IncrementRobotsBlocked(StatusBar: TscStatusBar);
// Incrémente le compteur de liens parcourus et applique la limite d'exploration
procedure IncrementLinksTraversed(StatusBar: TscStatusBar);
// Traite et enregistre un lien cassé : UI, dictionnaire, fichier rapport
procedure MarkBrokenLink(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; Logging: TscListBox);
// Vérifie la disponibilité d'un fichier via HEAD; fallback GET range si HEAD échoue
function IsFileAvailable(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; Depth: Integer; Logging: TscListBox): Boolean;
// Télécharge une ressource dans le dossier de téléchargement (organisé par type)
function DownloadFile(const URL: string; Client: THTTPClient;
out LocalPath: string; Logging: TscListBox): Boolean;
// Routine factorisée pour traiter une liste de ressources (vérif, robots, dispo, download)
procedure ProcessResourceGroup(ResourceList: TStringList;
const AcceptExts: array of string; StatusBar: TscStatusBar;
ListView: TscListView; Depth: Integer; const DefaultUIType: string;
Logging: TscListBox);
// Traite toutes les listes de ressources extraites d'une page (appel ProcessResourceGroup)
procedure ProcessFoundFiles(ImageList, DocList, AudioList, VideoList,
WebList: TStringList; StatusBar: TscStatusBar; ListView: TscListView;
CheckList: TscCheckListBox; Depth: Integer; Logging: TscListBox);
// Exploration récursive d'une page : récupération, extraction, traitement, récursion
procedure ExploreLinksRecursive(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; CheckList: TscCheckListBox; Depth: Integer;
Logging: TscListBox);
// Vérifie si LinkURL appartient au même domaine que BaseURL (ou sous-domaine)
function IsSameDomain(const BaseURL, LinkURL: string): Boolean;
// Normalise une URL relative ou absolue en URL absolue utilisable
function NormalizeURL(const BaseURL, RelOrAbsURL: string): string;
// Wrappers thread-safe pour mise à jour ListView / StatusBar
procedure SafeUpdateListViewStatus(ListView: TscListView;
const URL, StatusText: string; const Method: string = '');
procedure SafeUpdateListViewDownloadState(ListView: TscListView;
const URL, DownloadState: string);
procedure SafeUpdateListViewInfo(ListView: TscListView; const URL: string;
RespMs: Integer; const SizeBytes: string; Depth: Integer);
procedure SafeScrollListViewToBottom(ListView: TscListView);
procedure SafeSetStatusBarPanel(StatusBar: TscStatusBar;
PanelIndex: Integer; const Text: string);
// Logging thread-safe vers une TscListBox
procedure SafeLog(Logging: TscListBox; const Msg: string);
// robots.txt helpers : parse, cache et vérifie l'autorisation
function ParseRobots(const RobotsText: string;
OutList: TStringList): Boolean;
function EnsureRobotsForHost(const Host, Scheme: string): Boolean;
function IsAllowedByRobots(const URL: string): Boolean;
public
// Constructeur : initialise structure et valeurs par défaut
constructor Create;
// Destructeur : annule, attend et libère ressources
destructor Destroy; override;
// Configure les paramètres du crawl (timeouts, limites, options)
procedure ConfigureCrawl(const ARequestTimeoutMs, ARequestDelayMs: Integer;
ASameDomainOnly: Boolean; AAutoDownload: Boolean; ARespectRobots: Boolean;
AFoundFilesLimit: Integer; AExploreLimit: Integer);
// Démarre l'exploration synchroniquement ; crée rapports si demandé
procedure ExploreLinks(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; CheckList: TscCheckListBox; MaxDepth: Integer;
SaveBrokenToFile, SaveVisitedToFile, SaveFoundFilesToFile: Boolean;
Logging: TscListBox);
// Mettre en pause, reprendre ou annuler l'exploration
procedure PauseExploration;
procedure ResumeExploration;
procedure CancelExploration;
function IsCanceled: Boolean;
function IsPaused: Boolean;
function IsRunning: Boolean;
// Attend l'arrêt complet (bloquant) ; supprime le paramètre Timeout
function WaitForStop: Boolean;
// Applique les filtres de types de fichiers depuis une CheckList UI
procedure ApplyFileTypeFiltersFromCheckList(CheckList: TscCheckListBox);
// Autorise la désactivation des mises à jour UI (tests, performances)
property DisableUIUpdates: Boolean read FDisableUIUpdates
write FDisableUIUpdates;
end;
implementation
uses
System.Net.Mime, System.StrUtils;
function TScrapix.UIUpdatesAllowed: Boolean;
begin
Result := not FDisableUIUpdates;
end;
procedure TScrapix.SafeScrollListViewToBottom(ListView: TscListView);
begin
if not UIUpdatesAllowed then
Exit;
if ListView = nil then
Exit;
if TThread.Current.ThreadID = MainThreadID then
begin
if (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
if ListView.Items.Count > 0 then
ListView.Items[ListView.Items.Count - 1].MakeVisible(False);
end
else
begin
TThread.Queue(nil,
procedure
begin
if not UIUpdatesAllowed then
Exit;
if (ListView = nil) or (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
if ListView.Items.Count > 0 then
ListView.Items[ListView.Items.Count - 1].MakeVisible(False);
end);
end;
end;
procedure TScrapix.SafeSetStatusBarPanel(StatusBar: TscStatusBar;
PanelIndex: Integer; const Text: string);
begin
if not UIUpdatesAllowed then
Exit;
if StatusBar = nil then
Exit;
if PanelIndex < 0 then
Exit;
if TThread.Current.ThreadID = MainThreadID then
begin
if (csDestroying in StatusBar.ComponentState) or
(not StatusBar.HandleAllocated) then
Exit;
if PanelIndex < StatusBar.Panels.Count then
StatusBar.Panels[PanelIndex].Text := Text;
end
else
begin
TThread.Queue(nil,
procedure
begin
if not UIUpdatesAllowed then
Exit;
if (StatusBar = nil) or (csDestroying in StatusBar.ComponentState) or
(not StatusBar.HandleAllocated) then
Exit;
if PanelIndex < StatusBar.Panels.Count then
StatusBar.Panels[PanelIndex].Text := Text;
end);
end;
end;
procedure TScrapix.SafeUpdateListViewStatus(ListView: TscListView;
const URL, StatusText: string; const Method: string = '');
var
sURL, sStatus, sMethod: string;
I: Integer;
Item: TListItem;
begin
if not UIUpdatesAllowed then
Exit;
if ListView = nil then
Exit;
sURL := NormalizeURL(URL, URL);
if sURL = '' then
sURL := URL;
sStatus := StatusText;
sMethod := Method;
if TThread.Current.ThreadID = MainThreadID then
begin
if (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
for I := 0 to ListView.Items.Count - 1 do
begin
Item := ListView.Items[I];
if SameText(Item.Caption, sURL) or SameText(Item.Caption, URL) then
begin
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[0] := sStatus;
Item.SubItems[5] := sMethod;
SafeScrollListViewToBottom(ListView);
Exit;
end;
end;
Item := ListView.Items.Add;
Item.Caption := sURL;
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[0] := sStatus;
Item.SubItems[5] := sMethod;
SafeScrollListViewToBottom(ListView);
end
else
begin
TThread.Queue(nil,
procedure
var
I2: Integer;
It: TListItem;
begin
if not UIUpdatesAllowed then
Exit;
if (ListView = nil) or (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
for I2 := 0 to ListView.Items.Count - 1 do
begin
It := ListView.Items[I2];
if SameText(It.Caption, sURL) or SameText(It.Caption, URL) then
begin
while It.SubItems.Count < 6 do
It.SubItems.Add('');
It.SubItems[0] := sStatus;
It.SubItems[5] := sMethod;
SafeScrollListViewToBottom(ListView);
Exit;
end;
end;
It := ListView.Items.Add;
It.Caption := sURL;
while It.SubItems.Count < 6 do
It.SubItems.Add('');
It.SubItems[0] := sStatus;
It.SubItems[5] := sMethod;
SafeScrollListViewToBottom(ListView);
end);
end;
end;
procedure TScrapix.SafeUpdateListViewDownloadState(ListView: TscListView;
const URL, DownloadState: string);
var
sURL, sState: string;
I: Integer;
Item: TListItem;
begin
if not UIUpdatesAllowed then
Exit;
if ListView = nil then
Exit;
sURL := NormalizeURL(URL, URL);
if sURL = '' then
sURL := URL;
sState := DownloadState;
if TThread.Current.ThreadID = MainThreadID then
begin
if (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
for I := 0 to ListView.Items.Count - 1 do
begin
Item := ListView.Items[I];
if SameText(Item.Caption, sURL) or SameText(Item.Caption, URL) then
begin
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[1] := sState;
SafeScrollListViewToBottom(ListView);
Exit;
end;
end;
Item := ListView.Items.Add;
Item.Caption := sURL;
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[1] := sState;
SafeScrollListViewToBottom(ListView);
end
else
begin
TThread.Queue(nil,
procedure
var
I2: Integer;
It: TListItem;
begin
if not UIUpdatesAllowed then
Exit;
if (ListView = nil) or (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
for I2 := 0 to ListView.Items.Count - 1 do
begin
It := ListView.Items[I2];
if SameText(It.Caption, sURL) or SameText(It.Caption, URL) then
begin
while It.SubItems.Count < 6 do
It.SubItems.Add('');
It.SubItems[1] := sState;
SafeScrollListViewToBottom(ListView);
Exit;
end;
end;
It := ListView.Items.Add;
It.Caption := sURL;
while It.SubItems.Count < 6 do
It.SubItems.Add('');
It.SubItems[1] := sState;
SafeScrollListViewToBottom(ListView);
end);
end;
end;
procedure TScrapix.SafeUpdateListViewInfo(ListView: TscListView;
const URL: string; RespMs: Integer; const SizeBytes: string; Depth: Integer);
var
sURL, sRespMs, sSizeLocal, sDepth: string;
DepthLocal: Integer;
I: Integer;
Item: TListItem;
begin
if not UIUpdatesAllowed then
Exit;
if ListView = nil then
Exit;
sURL := NormalizeURL(URL, URL);
if sURL = '' then
sURL := URL;
if RespMs < 0 then
sRespMs := ''
else
sRespMs := IntToStr(RespMs);
sSizeLocal := SizeBytes;
DepthLocal := Depth;
if DepthLocal > 0 then
sDepth := IntToStr(DepthLocal)
else
sDepth := '';
if TThread.Current.ThreadID = MainThreadID then
begin
if (csDestroying in ListView.ComponentState) or
(not ListView.HandleAllocated) then
Exit;
for I := 0 to ListView.Items.Count - 1 do
begin
Item := ListView.Items[I];
if SameText(Item.Caption, sURL) or SameText(Item.Caption, URL) then
begin
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[2] := sRespMs;
Item.SubItems[3] := sSizeLocal;
if sDepth <> '' then
Item.SubItems[4] := sDepth;
SafeScrollListViewToBottom(ListView);
Exit;
end;
end;
Item := ListView.Items.Add;
Item.Caption := sURL;
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[2] := sRespMs;
Item.SubItems[3] := sSizeLocal;
if sDepth <> '' then
Item.SubItems[4] := sDepth;
SafeScrollListViewToBottom(ListView);
end
else
begin
TThread.Queue(nil,
procedure
begin
if not UIUpdatesAllowed then
Exit;
SafeUpdateListViewInfo(ListView, URL, RespMs, SizeBytes, Depth);
end);
end;
end;
procedure TScrapix.SafeLog(Logging: TscListBox; const Msg: string);
const
HORIZONTAL_MARGIN = 16;
var
NewWidth, CurrExtent, ClientW: Integer;
CanvasHandle: TCanvas;
S: string;
begin
S := Msg;
if UIUpdatesAllowed and (Logging <> nil) then
begin
if TThread.Current.ThreadID = MainThreadID then
begin
if (not(csDestroying in Logging.ComponentState)) and Logging.HandleAllocated
then
begin
try
Logging.Items.Add(S);
Logging.ItemIndex := Logging.Items.Count - 1;
except
end;
try
CanvasHandle := Logging.Canvas;
NewWidth := CanvasHandle.TextWidth(S) + HORIZONTAL_MARGIN;
except
NewWidth := 0;
end;
if NewWidth > 0 then
begin
CurrExtent := SendMessage(Logging.Handle,
LB_GETHORIZONTALEXTENT, 0, 0);
if NewWidth > CurrExtent then
SendMessage(Logging.Handle, LB_SETHORIZONTALEXTENT, NewWidth, 0)
else
begin
ClientW := Logging.ClientWidth;
if CurrExtent < ClientW then
SendMessage(Logging.Handle, LB_SETHORIZONTALEXTENT, ClientW, 0);
end;
end;
end;
end
else
begin
TThread.Queue(nil,
procedure
var
W: Integer;
Ce: Integer;
Cw: Integer;
begin
if not UIUpdatesAllowed then
Exit;
if (Logging = nil) or (csDestroying in Logging.ComponentState) or
(not Logging.HandleAllocated) then
Exit;
try
Logging.Items.Add(S);
Logging.ItemIndex := Logging.Items.Count - 1;
except
end;
try
W := Logging.Canvas.TextWidth(S) + HORIZONTAL_MARGIN;
except
W := 0;
end;
if W > 0 then
begin
Ce := SendMessage(Logging.Handle, LB_GETHORIZONTALEXTENT, 0, 0);
if W > Ce then
SendMessage(Logging.Handle, LB_SETHORIZONTALEXTENT, W, 0)
else
begin
Cw := Logging.ClientWidth;
if Ce < Cw then
SendMessage(Logging.Handle, LB_SETHORIZONTALEXTENT, Cw, 0);
end;
end;
end);
end;
end;
if (FLogFilePath <> '') and Assigned(FLogLock) then
begin
try
FLogLock.Acquire;
try
try
TFile.AppendAllText(FLogFilePath, S + sLineBreak, TEncoding.UTF8);
except
end;
finally
FLogLock.Release;
end;
except
end;
end;
end;
function TScrapix.NormalizeURL(const BaseURL, RelOrAbsURL: string): string;
var
S: string;
BaseUri: TURI;
SchemeHost, BasePath, BaseTrimmed: string;
Idx: Integer;
begin
Result := '';
S := Trim(RelOrAbsURL);
if S = '' then
Exit;
Idx := Pos('#', S);
if Idx > 0 then
Delete(S, Idx, MaxInt);
if S.StartsWith('mailto:', True) or S.StartsWith('javascript:', True) or
S.StartsWith('tel:', True) or S.StartsWith('data:', True) then
Exit;
if S.StartsWith('//') then
begin
Result := 'https:' + S;
Exit;
end;
if S.StartsWith('http://', True) or S.StartsWith('https://', True) then
begin
try
Result := TURI.Create(S).ToString
except
Result := S
end;
Exit;
end;
if BaseURL = '' then
Exit;
try
BaseUri := TURI.Create(BaseURL)
except
Exit
end;
SchemeHost := BaseUri.Scheme + '://' + BaseUri.Host;
if BaseUri.Port > 0 then
SchemeHost := SchemeHost + ':' + IntToStr(BaseUri.Port);
if S.StartsWith('/') then
begin
Result := SchemeHost + S;
Exit;
end;
BasePath := BaseUri.Path;
if (BasePath = '') or BasePath.EndsWith('/') then
BaseTrimmed := BasePath
else
BaseTrimmed := ExtractFilePath(BasePath);
if (BaseTrimmed = '') or (BaseTrimmed[1] <> '/') then
BaseTrimmed := '/' + BaseTrimmed;
Result := SchemeHost + BaseTrimmed;
if not Result.EndsWith('/') then
Result := Result + '/';
Result := Result + S;
try
Result := TURI.Create(Result).ToString
except
end;
end;
function GetResponseHeaderValue(const Resp: IHTTPResponse;
const HeaderName: string): string;
var
I: Integer;
begin
Result := '';
if Resp = nil then
Exit;
for I := 0 to Length(Resp.Headers) - 1 do
if SameText(Resp.Headers[I].Name, HeaderName) then
Exit(Resp.Headers[I].Value);
end;
function FormatBytes(const SizeBytes: string): string;
var
Bytes: Int64;
d: Double;
DigitsOnly: string;
begin
Result := '';
if Trim(SizeBytes) = '' then
Exit;
if Trim(SizeBytes).ToLower = 'n/a' then
begin
Result := 'n/a';
Exit;
end;
try
Bytes := StrToInt64(Trim(SizeBytes))
except
DigitsOnly := TRegEx.Replace(SizeBytes, '[^0-9]', '');
if DigitsOnly = '' then
Exit;
try
Bytes := StrToInt64(DigitsOnly)
except
Exit
end;
end;
if Bytes = 0 then
begin
Result := 'n/a';
Exit;
end;
if Bytes < 1024 then
Result := Format('%d Octets', [Bytes])
else if Bytes < Int64(1024) * 1024 then
begin
d := Bytes / 1024;
Result := FormatFloat('0.##', d) + ' Ko';
end
else if Bytes < Int64(1024) * 1024 * 1024 then
begin
d := Bytes / (1024 * 1024);
Result := FormatFloat('0.##', d) + ' Mo';
end
else
begin
d := Bytes / (1024 * 1024 * 1024);
Result := FormatFloat('0.##', d) + ' Go';
end;
end;
function TScrapix.ParseRobots(const RobotsText: string;
OutList: TStringList): Boolean;
var
Lines: TArray<string>;
I: Integer;
CurrentAgents: TStringList;
L: string;
AgentMatched: Boolean;
PathPart: string;
begin
Result := False;
OutList.Clear;
if RobotsText = '' then
Exit;
Lines := RobotsText.Split([#13#10, #10, #13],
TStringSplitOptions.ExcludeEmpty);
CurrentAgents := TStringList.Create;
try
CurrentAgents.Clear;
AgentMatched := False;
for I := 0 to Length(Lines) - 1 do
begin
L := Trim(Lines[I]);
if L = '' then
begin
CurrentAgents.Clear;
AgentMatched := False;
Continue;
end;
if StartsText('User-agent:', L) then
begin
CurrentAgents.Clear;
CurrentAgents.Add(Trim(Copy(L, Length('User-agent:') + 1, MaxInt)
).ToLower);
AgentMatched := SameText(CurrentAgents[0], 'Scrapix') or
SameText(CurrentAgents[0], '*');
Continue;
end;
if AgentMatched and StartsText('Disallow:', L) then
begin
PathPart := Trim(Copy(L, Length('Disallow:') + 1, MaxInt));
if PathPart = '' then
Continue;
if not PathPart.StartsWith('/') then
PathPart := '/' + PathPart;
if OutList.IndexOf(PathPart) = -1 then
OutList.Add(PathPart);
end;
end;
finally
CurrentAgents.Free;
end;
Result := True;
end;
function TScrapix.EnsureRobotsForHost(const Host, Scheme: string): Boolean;
var
Key: string;
RobotsURL, RobotsText: string;
Client: THTTPClient;
RespStream: TStringStream;
Resp: IHTTPResponse;
SL, NewSL: TStringList;
begin
if Host = '' then
Exit(False);
Key := LowerCase(Host);
if RobotsRules = nil then
RobotsRules := TDictionary<string, TStringList>.Create;
if RobotsRules.ContainsKey(Key) then
Exit(True);
RobotsURL := Scheme + '://' + Host + '/robots.txt';
Client := THTTPClient.Create;
try
Client.ConnectionTimeout := RequestTimeoutMs;
Client.ResponseTimeout := RequestTimeoutMs;
Client.UserAgent := UserAgent;
RespStream := TStringStream.Create('', TEncoding.UTF8);
try
try
Resp := Client.Get(RobotsURL, RespStream);
RobotsText := RespStream.DataString
except
RobotsText := '';
end;
finally
RespStream.Free;
end;
finally
Client.Free;
end;
SL := TStringList.Create;
try
ParseRobots(RobotsText, SL);
NewSL := TStringList.Create;
NewSL.Assign(SL);
RobotsRules.Add(Key, NewSL);
finally
SL.Free;
end;
Result := True;
end;
function TScrapix.IsAllowedByRobots(const URL: string): Boolean;
var
Host, Scheme, Path: string;
Rules: TStringList;
Key: string;
U: TURI;
I: Integer;
DisallowPath: string;
begin
if not FRespectRobots then
Exit(True);
Result := True;
if URL = '' then
Exit(True);
try
U := TURI.Create(URL);
Host := U.Host;
Scheme := U.Scheme;
Path := U.Path;
if Path = '' then
Path := '/';
except
Exit(True);
end;
Key := LowerCase(Host);
if (RobotsRules = nil) or (not RobotsRules.ContainsKey(Key)) then
EnsureRobotsForHost(Host, Scheme);
if (RobotsRules <> nil) and RobotsRules.ContainsKey(Key) then
begin
Rules := RobotsRules[Key];
for I := 0 to Rules.Count - 1 do
begin
DisallowPath := Rules[I];
if Path.StartsWith(DisallowPath, True) then
begin
Result := False;
Exit;
end;
end;
end;
end;
constructor TScrapix.Create;
begin
inherited Create;
VisitedLinks := nil;
FFoundFiles := nil;
RequestTimeoutMs := 30000;
RequestDelayMs := 0;
SameDomainOnly := True;
FState := STATE_RUNNING;
FPauseEvent := TEvent.Create(nil, True, True, '');
FStoppedEvent := TEvent.Create(nil, True, True, '');
TotalLinks := 0;
FileCount := 0;
BrokenCount := 0;
FRobotsBlocked := 0;
FLinksTraversed := 0;
FAutoDownload := False;
DownloadFolder := '';
RobotsRules := nil;
FRespectRobots := True;
FSearchImages := True;
FSearchDocuments := True;
FSearchAudio := True;
FSearchVideo := True;
FSearchWeb := True;
FFoundFiles := TDictionary<string, Boolean>.Create;
FBrokenLinks := TDictionary<string, Boolean>.Create;
FRunning := False;
FMaxDepth := 0;
FFoundFilesLimit := 2000;
FExploreLimit := 100;
FVisitedFilePath := '';
FBrokenFilePath := '';
FFoundFilePath := '';
FLogFilePath := '';
FLogLock := TCriticalSection.Create;
FDisableUIUpdates := False;
end;
destructor TScrapix.Destroy;
var
SL: TStringList;
begin
CancelExploration;
WaitForStop;
FreeAndNil(VisitedLinks);
FreeAndNil(FFoundFiles);
FreeAndNil(FBrokenLinks);
FreeAndNil(FPauseEvent);
FreeAndNil(FStoppedEvent);
FreeAndNil(FLogLock);
if Assigned(RobotsRules) then
begin
for SL in RobotsRules.Values do
SL.Free;
RobotsRules.Free;
end;
inherited;
end;
procedure TScrapix.PauseExploration;
begin
TInterlocked.Exchange(FState, STATE_PAUSED);
if Assigned(FPauseEvent) then
FPauseEvent.ResetEvent;
end;
procedure TScrapix.ResumeExploration;
begin
TInterlocked.Exchange(FState, STATE_RUNNING);
if Assigned(FPauseEvent) then
FPauseEvent.SetEvent;
end;
procedure TScrapix.CancelExploration;
begin
TInterlocked.Exchange(FState, STATE_CANCEL);
if Assigned(FPauseEvent) then
FPauseEvent.SetEvent;
end;
function TScrapix.IsCanceled: Boolean;
begin
Result := TInterlocked.CompareExchange(FState, 0, 0) = STATE_CANCEL;
end;
function TScrapix.IsPaused: Boolean;
begin
Result := TInterlocked.CompareExchange(FState, 0, 0) = STATE_PAUSED;
end;
function TScrapix.IsRunning: Boolean;
begin
Result := TInterlocked.CompareExchange(PInteger(@FRunning)^, 0, 0) <> 0;
end;
function TScrapix.WaitForStop: Boolean;
begin
CancelExploration;
if Assigned(FStoppedEvent) then
begin
Result := FStoppedEvent.WaitFor(INFINITE) = wrSignaled;
Exit;
end;
while FRunning do
Sleep(20);
Result := not FRunning;
end;
procedure TScrapix.ConfigureCrawl(const ARequestTimeoutMs, ARequestDelayMs
: Integer; ASameDomainOnly: Boolean; AAutoDownload: Boolean;
ARespectRobots: Boolean; AFoundFilesLimit: Integer; AExploreLimit: Integer);
begin
if ARequestTimeoutMs <= 0 then
RequestTimeoutMs := 30000
else
RequestTimeoutMs := ARequestTimeoutMs;
if ARequestDelayMs < 0 then
RequestDelayMs := 0
else
RequestDelayMs := ARequestDelayMs;
SameDomainOnly := ASameDomainOnly;
FAutoDownload := AAutoDownload;
FRespectRobots := ARespectRobots;
if AFoundFilesLimit < 1 then
FFoundFilesLimit := 1
else if AFoundFilesLimit > 2000 then
FFoundFilesLimit := 2000
else
FFoundFilesLimit := AFoundFilesLimit;
if AExploreLimit < 1 then
FExploreLimit := 1
else if AExploreLimit > 100 then
FExploreLimit := 100
else
FExploreLimit := AExploreLimit;
end;
function TScrapix.GetWebContent(const URL: string; ListView: TscListView;
Depth: Integer; Logging: TscListBox): string;
var
Client: THTTPClient;
Mem: TMemoryStream;
Resp: IHTTPResponse;
ContentType, ContentLength: string;
StatusCode: Integer;
NormURL: string;
StartTick, EndTick, ElapsedMs: Cardinal;
S: RawByteString;
I: Integer;
begin
Result := '';
if URL = '' then
Exit;
NormURL := NormalizeURL(URL, URL);
if NormURL = '' then
Exit;
Client := THTTPClient.Create;
try
Client.ConnectionTimeout := RequestTimeoutMs;
Client.ResponseTimeout := RequestTimeoutMs;
Client.UserAgent := UserAgent;
Mem := TMemoryStream.Create;
try
try
StartTick := GetTickCount;
Resp := Client.Get(NormURL, Mem);
EndTick := GetTickCount;
ElapsedMs := EndTick - StartTick;
StatusCode := -1;
ContentType := '';
ContentLength := '';
if Resp <> nil then
begin
StatusCode := Resp.StatusCode;
ContentType := GetResponseHeaderValue(Resp, 'Content-Type');
ContentLength := GetResponseHeaderValue(Resp, 'Content-Length');
if ContentLength = '' then
ContentLength := GetResponseHeaderValue(Resp, 'Content-Range');
if (ContentLength <> '') and ContentLength.StartsWith('bytes', True)
then
begin
I := LastDelimiter('/', ContentLength);
if I > 0 then
ContentLength := Copy(ContentLength, I + 1, MaxInt);
end;
end;
if ContentLength = '' then
ContentLength := IntToStr(Mem.Size);
if Mem.Size > 0 then
begin
SetLength(S, Mem.Size);
Mem.Position := 0;
Mem.ReadBuffer(S[1], Mem.Size);
Result := string(S);
end
else
Result := '';
if Assigned(ListView) then
begin
SafeUpdateListViewStatus(ListView, NormURL,
Format('%d %s', [StatusCode, ContentType]), 'GET');
SafeUpdateListViewInfo(ListView, NormURL, ElapsedMs,
FormatBytes(ContentLength), Depth);
end;
if Assigned(Logging) then
SafeLog(Logging, Format('GET %s -> %d %s (%s)', [NormURL, StatusCode,
ContentType, FormatBytes(ContentLength)]));
except
on E: Exception do
begin
if Assigned(ListView) then
begin
SafeUpdateListViewStatus(ListView, NormURL,
'Exception : ' + E.Message, 'GET');
SafeUpdateListViewInfo(ListView, NormURL, -1, '', Depth);
end;
if Assigned(Logging) then
SafeLog(Logging, Format('GET Exception %s : %s',
[NormURL, E.Message]));
Result := '';
end;
end;
finally
Mem.Free;
end;
if RequestDelayMs > 0 then
TThread.Sleep(RequestDelayMs);
finally
Client.Free;
end;
end;
procedure TScrapix.ExtractLinks(const HTML: string; BaseURL: string;
var LinkList: TStringList);
var
Regex: TRegEx;
Match: TMatch;
RawLink, Link: string;
begin
Regex := TRegEx.Create('<a\s+(?:[^>]*?\s+)?href="([^"]*)"', [roIgnoreCase]);
Match := Regex.Match(HTML);
while Match.Success do
begin
RawLink := Match.Groups[1].Value.Trim;
Match := Match.NextMatch;
if RawLink = '' then
Continue;
Link := NormalizeURL(BaseURL, RawLink);
if Link = '' then
Continue;
if (VisitedLinks = nil) or not VisitedLinks.ContainsKey(Link) then
if LinkList.IndexOf(Link) = -1 then
LinkList.Add(Link);
end;
end;
function RemoveURLParams(const URL: string): string;
var
P: Integer;
begin
Result := URL;
P := Pos('?', Result);
if P > 0 then
Result := Copy(Result, 1, P - 1);
end;
procedure TScrapix.ExtractMediaSources(const HTML: string; BaseURL: string;
var ImageList, DocList, AudioList, VideoList, WebList: TStringList);
var
RegexImg, RegexDoc, RegexAudio, RegexVideo: TRegEx;
RegexCss, RegexJs, RegexFont, RegexHtmlLink: TRegEx;
Match: TMatch;
RawSource, Source: string;
procedure AddIfNew(List: TStringList; const S: string);
begin
if (S <> '') and (TPath.GetExtension(S) <> '') and (List.IndexOf(S) = -1)
then
List.Add(S);
end;
begin
if FSearchImages then
begin
RegexImg := TRegEx.Create
('<img\s+[^>]*src="([^"]+\.(jpg|jpeg|png|gif|bmp|webp|svg))"',
[roIgnoreCase]);
Match := RegexImg.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(ImageList, Source);
Match := Match.NextMatch;
end;
end;
if FSearchDocuments then
begin
RegexDoc := TRegEx.Create
('<a\s+[^>]*href="([^"]+\.(pdf|zip|rtf|doc|docx|xls|xlsx|ppt|pptx))"',
[roIgnoreCase]);
Match := RegexDoc.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(DocList, Source);
Match := Match.NextMatch;
end;
end;
if FSearchAudio then
begin
RegexAudio := TRegEx.Create
('(?:<audio\b[^>]*>.*?<source[^>]*src="([^"]+\.(mp3|wav|ogg|m4a|flac))")|href="([^"]+\.(mp3|wav|ogg|m4a|flac))"',
[roIgnoreCase, roSingleLine]);
Match := RegexAudio.Match(HTML);
while Match.Success do
begin
if Match.Groups[1].Value <> '' then
RawSource := Match.Groups[1].Value
else
RawSource := Match.Groups[3].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(AudioList, Source);
Match := Match.NextMatch;
end;
end;
if FSearchVideo then
begin
RegexVideo := TRegEx.Create
('(?:<video\b[^>]*>.*?<source[^>]*src="([^"]+\.(mp4|webm|mov|ogv|mkv))")|href="([^"]+\.(mp4|webm|mov|ogv|mkv))"',
[roIgnoreCase, roSingleLine]);
Match := RegexVideo.Match(HTML);
while Match.Success do
begin
if Match.Groups[1].Value <> '' then
RawSource := Match.Groups[1].Value
else
RawSource := Match.Groups[3].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(VideoList, Source);
Match := Match.NextMatch;
end;
end;
if FSearchWeb then
begin
RegexCss := TRegEx.Create('<link\s+[^>]*href="([^"]+\.(css))"[^>]*>',
[roIgnoreCase]);
Match := RegexCss.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(WebList, Source);
Match := Match.NextMatch;
end;
RegexJs := TRegEx.Create('<script\s+[^>]*src="([^"]+\.js)"',
[roIgnoreCase]);
Match := RegexJs.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(WebList, Source);
Match := Match.NextMatch;
end;
RegexHtmlLink := TRegEx.Create('<a\s+[^>]*href="([^"]+\.(html|htm))"',
[roIgnoreCase]);
Match := RegexHtmlLink.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(WebList, Source);
Match := Match.NextMatch;
end;
RegexFont := TRegEx.Create
('(?:href|src)=["'']([^"''\)]+?\.(woff2?|ttf|otf))["'']', [roIgnoreCase]);
Match := RegexFont.Match(HTML);
while Match.Success do
begin
RawSource := Match.Groups[1].Value;
Source := RemoveURLParams(RawSource);
Source := NormalizeURL(BaseURL, Source);
AddIfNew(WebList, Source);
Match := Match.NextMatch;
end;
end;
end;
procedure TScrapix.MarkBrokenLink(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; Logging: TscListBox);
begin
Inc(BrokenCount);
if Assigned(ListView) then
SafeUpdateListViewStatus(ListView, URL, GetTranslate('Broken'));
if Assigned(FBrokenLinks) and not FBrokenLinks.ContainsKey(URL) then
FBrokenLinks.Add(URL, True);
if FBrokenFilePath <> '' then
try
TFile.AppendAllText(FBrokenFilePath, URL + sLineBreak, TEncoding.UTF8)
except
end;
if Assigned(StatusBar) then
SafeSetStatusBarPanel(StatusBar, 3, IntToStr(BrokenCount));
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('BrokenLinkLog'), [URL]));
end;
procedure TScrapix.IncrementRobotsBlocked(StatusBar: TscStatusBar);
begin
Inc(FRobotsBlocked);
if Assigned(StatusBar) then
SafeSetStatusBarPanel(StatusBar, 5, IntToStr(FRobotsBlocked));
end;
procedure TScrapix.IncrementLinksTraversed(StatusBar: TscStatusBar);
begin
Inc(FLinksTraversed);
if Assigned(StatusBar) then
SafeSetStatusBarPanel(StatusBar, 7, IntToStr(FLinksTraversed));
if (FExploreLimit > 0) and (FLinksTraversed >= FExploreLimit) then
CancelExploration;
end;
function TScrapix.IsFileAvailable(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; Depth: Integer; Logging: TscListBox): Boolean;
var
Client: THTTPClient;
Resp: IHTTPResponse;
Headers: TNetHeaders;
RespMem: TMemoryStream;
StatusCode: Integer;
ContentType: string;
NormURL: string;
StartTick, EndTick, ElapsedMs: Cardinal;
ContentLength: string;
I: Integer;
begin
Result := False;
if URL = '' then
Exit;
NormURL := NormalizeURL(URL, URL);
if NormURL = '' then
Exit;
if FRespectRobots and not IsAllowedByRobots(NormURL) then
begin
if Assigned(ListView) then
SafeUpdateListViewStatus(ListView, NormURL,
GetTranslate('BlockedByRobots'), 'HEAD');
IncrementRobotsBlocked(StatusBar);
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('BlockedRobotsHEADLog'), [NormURL]));
Exit(False);
end;
Client := THTTPClient.Create;
try
Client.ConnectionTimeout := RequestTimeoutMs;
Client.ResponseTimeout := RequestTimeoutMs;
Client.UserAgent := UserAgent;
Resp := nil;
ContentLength := '';
StartTick := 0;
try
try
StartTick := GetTickCount;
Resp := Client.Head(NormURL);
EndTick := GetTickCount;
except
Resp := nil;
EndTick := GetTickCount;
end;
ElapsedMs := EndTick - StartTick;
if Resp = nil then
begin
SetLength(Headers, 1);
Headers[0].Name := 'Range';
Headers[0].Value := 'bytes=0-0';
RespMem := TMemoryStream.Create;
try
try
StartTick := GetTickCount;
Resp := Client.Get(NormURL, RespMem, Headers);
EndTick := GetTickCount;
ElapsedMs := EndTick - StartTick;
ContentLength := GetResponseHeaderValue(Resp, 'Content-Length');
if ContentLength = '' then
ContentLength := GetResponseHeaderValue(Resp, 'Content-Range');
if (ContentLength <> '') and ContentLength.StartsWith('bytes', True)
then
begin
I := LastDelimiter('/', ContentLength);
if I > 0 then
ContentLength := Copy(ContentLength, I + 1, MaxInt);
end;
if ContentLength = '' then
ContentLength := IntToStr(RespMem.Size);
except
Resp := nil;
ContentLength := '';
end;
finally
RespMem.Free;
end;
SetLength(Headers, 0);
end
else
begin
ContentLength := GetResponseHeaderValue(Resp, 'Content-Length');
end;
if Resp <> nil then
begin
StatusCode := Resp.StatusCode;
ContentType := GetResponseHeaderValue(Resp, 'Content-Type');
Result := (StatusCode >= 200) and (StatusCode < 300);
if Assigned(ListView) then
begin
if ContentLength = '' then
ContentLength := '0';
SafeUpdateListViewStatus(ListView, NormURL,
Format('%d %s', [StatusCode, ContentType]), 'HEAD');
SafeUpdateListViewInfo(ListView, NormURL, ElapsedMs,
FormatBytes(ContentLength), Depth);
end;
if Assigned(Logging) then
SafeLog(Logging, Format('HEAD %s -> %d %s (%s)', [NormURL, StatusCode,
ContentType, FormatBytes(ContentLength)]));
end
else
begin
if Assigned(ListView) then
SafeUpdateListViewStatus(ListView, NormURL,
GetTranslate('NoResponse'), 'HEAD');
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('NoResponseHEADLog'),
[NormURL]));
Result := False;
end;
except
on E: Exception do
begin
if Assigned(ListView) then
begin
SafeUpdateListViewStatus(ListView, NormURL,
'Exception : ' + E.Message, '');
SafeUpdateListViewInfo(ListView, NormURL, -1, '', Depth);
end;
if Assigned(Logging) then
SafeLog(Logging, Format('HEAD Exception %s : %s',
[NormURL, E.Message]));
Result := False;
end;
end;
finally
Client.Free;
end;
end;
function TScrapix.DownloadFile(const URL: string; Client: THTTPClient;
out LocalPath: string; Logging: TscListBox): Boolean;
var
FileName, Ext, UriPath, CandidateFolder, CandidateFile, BaseName: string;
FS: TFileStream;
Resp: IHTTPResponse;
NormURL: string;
Suffix: Integer;
function DetermineSubFolderByExtension(const AExt: string): string;
begin
if AExt = '' then
Exit('Autre');
if SameText(AExt, '.jpg') or SameText(AExt, '.jpeg') or
SameText(AExt, '.png') or SameText(AExt, '.gif') or SameText(AExt, '.bmp')
or SameText(AExt, '.webp') or SameText(AExt, '.svg') then
Exit('Image');
if SameText(AExt, '.pdf') or SameText(AExt, '.zip') or
SameText(AExt, '.rtf') or SameText(AExt, '.doc') or
SameText(AExt, '.docx') or SameText(AExt, '.xls') or
SameText(AExt, '.xlsx') or SameText(AExt, '.ppt') or
SameText(AExt, '.pptx') or SameText(AExt, '.txt') then
Exit('Document');
if SameText(AExt, '.mp3') or SameText(AExt, '.wav') or
SameText(AExt, '.ogg') or SameText(AExt, '.m4a') or SameText(AExt, '.flac')
then
Exit('Audio');
if SameText(AExt, '.mp4') or SameText(AExt, '.webm') or
SameText(AExt, '.mov') or SameText(AExt, '.ogv') or SameText(AExt, '.mkv')
then
Exit('Vidéo');
if SameText(AExt, '.css') then
Exit(TPath.Combine('Ressources Web', 'CSS'));
if SameText(AExt, '.js') then
Exit(TPath.Combine('Ressources Web', 'JS'));
if SameText(AExt, '.html') or SameText(AExt, '.htm') then
Exit(TPath.Combine('Ressources Web', 'HTML'));
if SameText(AExt, '.woff') or SameText(AExt, '.woff2') or
SameText(AExt, '.ttf') or SameText(AExt, '.otf') then
Exit(TPath.Combine('Ressources Web', 'Fonts'));
Result := 'Autre';
end;
begin
Result := False;
LocalPath := '';
if (URL = '') or (Client = nil) then
Exit;
NormURL := NormalizeURL(URL, URL);
if NormURL = '' then
Exit;
if FRespectRobots and not IsAllowedByRobots(NormURL) then
begin
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('BlockedRobotsDownLog'), [NormURL]));
Exit(False);
end;
try
try
try
UriPath := TURI.Create(NormURL).Path
except
UriPath := '';
end;
FileName := TPath.GetFileName(UriPath);
if FileName = '' then
FileName := 'file';
BaseName := TPath.GetFileNameWithoutExtension(FileName);
Ext := TPath.GetExtension(FileName);
if Ext = '' then
Ext := '';
CandidateFolder := TPath.Combine(DownloadFolder,
DetermineSubFolderByExtension(Ext));
if not TDirectory.Exists(CandidateFolder) then
try
TDirectory.CreateDirectory(CandidateFolder)
except
Exit(False)
end;
CandidateFile := TPath.Combine(CandidateFolder, BaseName + Ext);
Suffix := 0;
while TFile.Exists(CandidateFile) do
begin
Inc(Suffix);
CandidateFile := TPath.Combine(CandidateFolder,
BaseName + '_' + IntToStr(Suffix) + Ext);
if Suffix > 10000 then
Break;
end;
LocalPath := CandidateFile;
FS := TFileStream.Create(LocalPath, fmCreate);
try
Resp := Client.Get(NormURL, FS);
if Resp <> nil then
Result := (Resp.StatusCode >= 200) and (Resp.StatusCode < 300)
else
Result := False;
finally
FS.Free;
if not Result then
begin
try
if TFile.Exists(LocalPath) then
TFile.Delete(LocalPath)
except
end;
LocalPath := '';
end;
end;
if Result then
begin
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('DonwLog'),
[NormURL, LocalPath]));
end
else
begin
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('DonwFailedLog'), [NormURL]));
end;
except
on E: Exception do
begin
Result := False;
LocalPath := '';
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('ExceptDonwLog'),
[URL, E.Message]));
end;
end;
finally
end;
end;
procedure TScrapix.ProcessResourceGroup(ResourceList: TStringList;
const AcceptExts: array of string; StatusBar: TscStatusBar;
ListView: TscListView; Depth: Integer; const DefaultUIType: string;
Logging: TscListBox);
var
I: Integer;
URL: string;
Available: Boolean;
DLClient: THTTPClient;
LocalPath: string;
AddedCount: Integer;
AcceptAny: Boolean;
function IsExtAccepted(const AURL: string): Boolean;
var
E: string;
AExt: string;
begin
if Length(AcceptExts) = 0 then
begin
Result := True;
Exit;
end;
AExt := LowerCase(TPath.GetExtension(AURL));
for E in AcceptExts do
if AExt = LowerCase(E) then
Exit(True);
Result := False;
end;
begin
if (ResourceList = nil) or (ResourceList.Count = 0) then
Exit;
AddedCount := 0;
AcceptAny := Length(AcceptExts) = 0;
for I := 0 to ResourceList.Count - 1 do
begin
if IsCanceled then
Exit;
while IsPaused do
begin
if IsCanceled then
Exit;
if Assigned(FPauseEvent) then
FPauseEvent.WaitFor(250);
end;
URL := ResourceList[I];
if (not AcceptAny) and (not IsExtAccepted(URL)) then
Continue;
if (FFoundFiles <> nil) and FFoundFiles.ContainsKey(URL) then
Continue;
if FRespectRobots and not IsAllowedByRobots(URL) then
begin
SafeUpdateListViewStatus(ListView, URL, GetTranslate('BlockedByRobots'));
SafeUpdateListViewDownloadState(ListView, URL, GetTranslate('Ignored'));
IncrementRobotsBlocked(StatusBar);
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('BlockedRobotsResLog'), [URL]));
Continue;
end;
Available := IsFileAvailable(URL, ListView, StatusBar, Depth, Logging);
if Available then
begin
if FAutoDownload then
begin
DLClient := THTTPClient.Create;
try
DLClient.ConnectionTimeout := RequestTimeoutMs;
DLClient.ResponseTimeout := RequestTimeoutMs;
DLClient.UserAgent := UserAgent;
SafeUpdateListViewDownloadState(ListView, URL,
GetTranslate('Downloading'));
if DownloadFile(URL, DLClient, LocalPath, Logging) then
begin
SafeUpdateListViewDownloadState(ListView, URL,
GetTranslate('Downloaded'));
Inc(AddedCount);
if FFoundFiles <> nil then
begin
FFoundFiles.Add(URL, True);
if FFoundFilePath <> '' then
try
TFile.AppendAllText(FFoundFilePath, URL + sLineBreak,
TEncoding.UTF8)
except
end;
end;
end
else
begin
SafeUpdateListViewDownloadState(ListView, URL,
GetTranslate('DownloadFailed'));
SafeUpdateListViewStatus(ListView, URL,
GetTranslate('DownloadFailed'));
end;
finally
DLClient.Free;
end;
end
else
begin
Inc(AddedCount);
SafeUpdateListViewDownloadState(ListView, URL,
GetTranslate('NotDownloaded'));
if FFoundFiles <> nil then
begin
FFoundFiles.Add(URL, True);
if FFoundFilePath <> '' then
try
TFile.AppendAllText(FFoundFilePath, URL + sLineBreak,
TEncoding.UTF8)
except
end;
end;
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('FoundNotDownLog'), [URL]));
end;
end
else
begin
if not FAutoDownload then
begin
MarkBrokenLink(URL, ListView, StatusBar, Logging);
SafeUpdateListViewDownloadState(ListView, URL, GetTranslate('Broken'));
end
else
begin
SafeUpdateListViewStatus(ListView, URL, GetTranslate('Broken_Ignored'));
SafeUpdateListViewDownloadState(ListView, URL,
GetTranslate('Broken_Ignored'));
if Assigned(FBrokenLinks) and not FBrokenLinks.ContainsKey(URL) then
FBrokenLinks.Add(URL, True);
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('CorruptedDownLog'), [URL]));
end;
end;
if (FFoundFilesLimit > 0) and (FileCount + AddedCount >= FFoundFilesLimit)
then
begin
CancelExploration;
Break;
end;
end;
if AddedCount > 0 then
Inc(FileCount, AddedCount);
if Assigned(StatusBar) then
SafeSetStatusBarPanel(StatusBar, 1, IntToStr(FileCount));
if (FFoundFilesLimit > 0) and (FileCount >= FFoundFilesLimit) then
CancelExploration;
end;
procedure TScrapix.ProcessFoundFiles(ImageList, DocList, AudioList, VideoList,
WebList: TStringList; StatusBar: TscStatusBar; ListView: TscListView;
CheckList: TscCheckListBox; Depth: Integer; Logging: TscListBox);
begin
if FSearchImages then
ProcessResourceGroup(ImageList, ['.jpg', '.jpeg', '.png', '.gif', '.bmp',
'.webp', '.svg'], StatusBar, ListView, Depth, 'Image', Logging);
if FSearchDocuments then
ProcessResourceGroup(DocList, ['.pdf', '.zip', '.rtf', '.doc', '.docx',
'.xls', '.xlsx', '.ppt', '.pptx', '.txt'], StatusBar, ListView, Depth,
'Document', Logging);
if FSearchVideo then
ProcessResourceGroup(VideoList, ['.mp4', '.webm', '.mov', '.ogv', '.mkv'],
StatusBar, ListView, Depth, 'Vidéo', Logging);
if FSearchAudio then
ProcessResourceGroup(AudioList, ['.mp3', '.wav', '.ogg', '.m4a', '.flac'],
StatusBar, ListView, Depth, 'Audio', Logging);
if FSearchWeb then
ProcessResourceGroup(WebList, ['.css', '.js', '.html', '.htm', '.woff',
'.woff2', '.ttf', '.otf'], StatusBar, ListView, Depth,
'RessourceWeb', Logging);
end;
function TScrapix.IsSameDomain(const BaseURL, LinkURL: string): Boolean;
var
HostBase, HostLink: string;
TempBase: string;
function HostIsSuffixOf(const SuffixHost, FullHost: string): Boolean;
begin
Result := (SuffixHost = FullHost) or FullHost.EndsWith('.' + SuffixHost);
end;
begin
Result := False;
if LinkURL = '' then
Exit;
TempBase := Trim(BaseURL);
if TempBase = '' then
Exit;
if Pos('://', TempBase) = 0 then
HostBase := LowerCase(TempBase)
else
try
HostBase := LowerCase(TURI.Create(TempBase).Host)
except
HostBase := ''
end;
if HostBase = '' then
Exit;
try
HostLink := LowerCase(TURI.Create(LinkURL).Host)
except
HostLink := ''
end;
if HostLink = '' then
Exit;
Result := HostIsSuffixOf(HostBase, HostLink);
end;
procedure TScrapix.ExploreLinksRecursive(const URL: string;
ListView: TscListView; StatusBar: TscStatusBar; CheckList: TscCheckListBox;
Depth: Integer; Logging: TscListBox);
var
HTMLContent: string;
Links, Images, Docs, Audio, Video, Webs: TStringList;
I: Integer;
Item: TListItem;
NormURL: string;
NeedExtract: Boolean;
CurrentDepth: Integer;
begin
if IsCanceled then
Exit;
if Depth <= 0 then
Exit;
if FMaxDepth <= 0 then
CurrentDepth := Depth
else
CurrentDepth := FMaxDepth - Depth + 1;
NormURL := NormalizeURL(URL, URL);
if NormURL = '' then
Exit;
if (VisitedLinks <> nil) and VisitedLinks.ContainsKey(NormURL) then
Exit;
if FRespectRobots and not IsAllowedByRobots(NormURL) then
begin
if Assigned(ListView) then
begin
SafeUpdateListViewStatus(ListView, NormURL,
GetTranslate('BlockedByRobots'));
SafeUpdateListViewDownloadState(ListView, NormURL,
GetTranslate('Ignored'));
end;
IncrementRobotsBlocked(StatusBar);
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('BlockedRobotsLog'), [NormURL]));
Exit;
end;
while IsPaused do
begin
if IsCanceled then
Exit;
if Assigned(FPauseEvent) then
FPauseEvent.WaitFor(250);
end;
VisitedLinks.Add(NormURL, True);
Inc(TotalLinks);
IncrementLinksTraversed(StatusBar);
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('VisitedLog'),
[NormURL, CurrentDepth]));
if IsCanceled then
Exit;
if (FFoundFilesLimit > 0) and (FileCount >= FFoundFilesLimit) then
begin
CancelExploration;
Exit;
end;
if (FExploreLimit > 0) and (FLinksTraversed >= FExploreLimit) then
begin
CancelExploration;
Exit;
end;
if FVisitedFilePath <> '' then
try
TFile.AppendAllText(FVisitedFilePath, NormURL + sLineBreak,
TEncoding.UTF8)
except
end;
if Assigned(ListView) and UIUpdatesAllowed then
begin
if TThread.Current.ThreadID = MainThreadID then
begin
Item := ListView.Items.Add;
Item.Caption := NormURL;
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.SubItems[0] := GetTranslate('OnHold');
Item.SubItems[4] := IntToStr(CurrentDepth);
SafeScrollListViewToBottom(ListView);
end
else
begin
var
LV := ListView;
var
sURL := NormURL;
var
sDepth := IntToStr(CurrentDepth);
TThread.Queue(nil,
procedure
begin
if not UIUpdatesAllowed then
Exit;
if (LV = nil) or (csDestroying in LV.ComponentState) or
(not LV.HandleAllocated) then
Exit;
Item := LV.Items.Add;
while Item.SubItems.Count < 6 do
Item.SubItems.Add('');
Item.Caption := sURL;
Item.SubItems[0] := GetTranslate('OnHold');
Item.SubItems[4] := sDepth;
SafeScrollListViewToBottom(LV);
end);
end;
end;
HTMLContent := GetWebContent(NormURL, ListView, CurrentDepth, Logging);
if HTMLContent = '' then
begin
if not FAutoDownload then
begin
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('MarkBrokenLinkLog'), [NormURL]));
MarkBrokenLink(NormURL, ListView, StatusBar, Logging)
end
else
begin
SafeUpdateListViewStatus(ListView, NormURL,
GetTranslate('Broken_Ignored'));
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('NoContentLog'), [NormURL]));
end;
Exit;
end;
Links := TStringList.Create;
Images := TStringList.Create;
Docs := TStringList.Create;
Audio := TStringList.Create;
Video := TStringList.Create;
Webs := TStringList.Create;
try
ExtractLinks(HTMLContent, NormURL, Links);
NeedExtract := FSearchImages or FSearchDocuments or FSearchAudio or
FSearchVideo or FSearchWeb;
if NeedExtract then
ExtractMediaSources(HTMLContent, NormURL, Images, Docs, Audio,
Video, Webs);
ProcessFoundFiles(Images, Docs, Audio, Video, Webs, StatusBar, ListView,
CheckList, CurrentDepth, Logging);
if IsCanceled then
Exit;
if (FFoundFilesLimit > 0) and (FileCount >= FFoundFilesLimit) then
Exit;
if (FExploreLimit > 0) and (FLinksTraversed >= FExploreLimit) then
Exit;
for I := 0 to Links.Count - 1 do
begin
if IsCanceled then
Exit;
while IsPaused do
begin
if IsCanceled then
Exit;
if Assigned(FPauseEvent) then
FPauseEvent.WaitFor(250);
end;
if SameDomainOnly then
begin
if not IsSameDomain(RootDomain, Links[I]) then
Continue;
end;
ExploreLinksRecursive(Links[I], ListView, StatusBar, CheckList,
Depth - 1, Logging);
end;
if Assigned(StatusBar) then
begin
SafeSetStatusBarPanel(StatusBar, 1, IntToStr(FileCount));
SafeSetStatusBarPanel(StatusBar, 3, IntToStr(BrokenCount));
SafeSetStatusBarPanel(StatusBar, 5, IntToStr(FRobotsBlocked));
SafeSetStatusBarPanel(StatusBar, 7, IntToStr(FLinksTraversed));
end;
finally
Links.Free;
Images.Free;
Docs.Free;
Audio.Free;
Video.Free;
Webs.Free;
end;
end;
procedure TScrapix.ExploreLinks(const URL: string; ListView: TscListView;
StatusBar: TscStatusBar; CheckList: TscCheckListBox; MaxDepth: Integer;
SaveBrokenToFile, SaveVisitedToFile, SaveFoundFilesToFile: Boolean;
Logging: TscListBox);
var
UriStart: TURI;
RootFolder, StartUrlFolder, ReportFolder, StartFolderName: string;
DocFolder, FileName, FilePath, LogFolder: string;
SL: TStringList;
Key: string;
begin
if Assigned(FStoppedEvent) then
FStoppedEvent.ResetEvent;
FRunning := True;
try
FreeAndNil(VisitedLinks);
VisitedLinks := TDictionary<string, Boolean>.Create;
if Assigned(FFoundFiles) then
FFoundFiles.Clear;
if Assigned(FBrokenLinks) then
FBrokenLinks.Clear;
TotalLinks := 0;
FileCount := 0;
BrokenCount := 0;
FRobotsBlocked := 0;
FLinksTraversed := 0;
FVisitedFilePath := '';
FBrokenFilePath := '';
FFoundFilePath := '';
TInterlocked.Exchange(FState, STATE_RUNNING);
if Assigned(FPauseEvent) then
FPauseEvent.SetEvent;
if RequestTimeoutMs <= 0 then
RequestTimeoutMs := 30000;
if RequestDelayMs < 0 then
RequestDelayMs := 0;
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('StartingLog'), [URL, MaxDepth]));
try
try
UriStart := TURI.Create(URL);
RootDomain := UriStart.Host
except
RootDomain := ''
end;
RootFolder := TPath.Combine(TPath.GetDocumentsPath, 'Scrapix');
StartFolderName := RootDomain;
StartUrlFolder := TPath.Combine(RootFolder, StartFolderName);
ReportFolder := TPath.Combine(StartUrlFolder, 'Report');
try
if not TDirectory.Exists(RootFolder) then
TDirectory.CreateDirectory(RootFolder);
if not TDirectory.Exists(StartUrlFolder) then
TDirectory.CreateDirectory(StartUrlFolder);
if not TDirectory.Exists(ReportFolder) then
TDirectory.CreateDirectory(ReportFolder);
except
end;
try
LogFolder := TPath.Combine(ReportFolder, 'Logging');
if not TDirectory.Exists(LogFolder) then
TDirectory.CreateDirectory(LogFolder);
FLogFilePath := TPath.Combine(LogFolder, 'Logging.txt');
try
TFile.WriteAllText(FLogFilePath, '', TEncoding.UTF8);
except
FLogFilePath := '';
end;
except
FLogFilePath := '';
end;
DownloadFolder := TPath.Combine(StartUrlFolder, 'download');
try
if not TDirectory.Exists(DownloadFolder) then
TDirectory.CreateDirectory(DownloadFolder);
if not TDirectory.Exists(TPath.Combine(DownloadFolder, 'Image')) then
TDirectory.CreateDirectory(TPath.Combine(DownloadFolder, 'Image'));
if not TDirectory.Exists(TPath.Combine(DownloadFolder, 'Document')) then
TDirectory.CreateDirectory(TPath.Combine(DownloadFolder, 'Document'));
if not TDirectory.Exists(TPath.Combine(DownloadFolder, 'Audio')) then
TDirectory.CreateDirectory(TPath.Combine(DownloadFolder, 'Audio'));
if not TDirectory.Exists(TPath.Combine(DownloadFolder, 'Vidéo')) then
TDirectory.CreateDirectory(TPath.Combine(DownloadFolder, 'Vidéo'));
if not TDirectory.Exists(TPath.Combine(DownloadFolder, 'Web Document'))
then
TDirectory.CreateDirectory(TPath.Combine(DownloadFolder,
'Web Document'));
except
end;
if SaveBrokenToFile then
begin
FileName := 'BrokenLinks.txt';
FBrokenFilePath := TPath.Combine(ReportFolder, FileName);
try
TFile.WriteAllText(FBrokenFilePath, '', TEncoding.UTF8)
except
FBrokenFilePath := ''
end;
end;
if SaveVisitedToFile then
begin
FileName := 'VisitedLinks.txt';
FVisitedFilePath := TPath.Combine(ReportFolder, FileName);
try
TFile.WriteAllText(FVisitedFilePath, '', TEncoding.UTF8)
except
FVisitedFilePath := ''
end;
end;
if SaveFoundFilesToFile then
begin
FileName := 'FoundFiles.txt';
FFoundFilePath := TPath.Combine(ReportFolder, FileName);
try
TFile.WriteAllText(FFoundFilePath, '', TEncoding.UTF8)
except
FFoundFilePath := ''
end;
end;
FMaxDepth := MaxDepth;
if Assigned(Logging) then
SafeLog(Logging, GetTranslate('LaunchingLog'));
ExploreLinksRecursive(URL, ListView, StatusBar, CheckList,
MaxDepth, Logging);
finally
FreeAndNil(VisitedLinks);
end;
if SaveBrokenToFile and Assigned(FBrokenLinks) and (FBrokenLinks.Count > 0)
then
begin
DocFolder := TPath.GetDocumentsPath;
FileName := 'BrokenLinks.txt';
FilePath := TPath.Combine(DocFolder, FileName);
SL := TStringList.Create;
try
for Key in FBrokenLinks.Keys do
SL.Add(Key);
try
SL.SaveToFile(FilePath, TEncoding.UTF8)
except
end;
finally
SL.Free;
end;
end;
if SaveVisitedToFile and Assigned(VisitedLinks) and (VisitedLinks.Count > 0)
then
begin
DocFolder := TPath.GetDocumentsPath;
if FVisitedFilePath <> '' then
FilePath := FVisitedFilePath
else
FilePath := TPath.Combine(DocFolder, 'VisitedLinks.txt');
SL := TStringList.Create;
try
for Key in VisitedLinks.Keys do
SL.Add(Key);
try
SL.SaveToFile(FilePath, TEncoding.UTF8)
except
end;
finally
SL.Free;
end;
end;
if SaveFoundFilesToFile and Assigned(FFoundFiles) and (FFoundFiles.Count > 0)
then
begin
DocFolder := TPath.GetDocumentsPath;
if FFoundFilePath <> '' then
FilePath := FFoundFilePath
else
FilePath := TPath.Combine(DocFolder, 'FoundFiles.txt');
SL := TStringList.Create;
try
for Key in FFoundFiles.Keys do
SL.Add(Key);
try
SL.SaveToFile(FilePath, TEncoding.UTF8)
except
end;
finally
SL.Free;
end;
end;
finally
if Assigned(Logging) then
SafeLog(Logging, Format(GetTranslate('FinishedLog'),
[FileCount, BrokenCount, TotalLinks]));
FVisitedFilePath := '';
FBrokenFilePath := '';
FFoundFilePath := '';
FRunning := False;
if Assigned(FStoppedEvent) then
FStoppedEvent.SetEvent;
end;
end;
procedure TScrapix.ApplyFileTypeFiltersFromCheckList
(CheckList: TscCheckListBox);
var
Idx: Integer;
Txt: string;
begin
FSearchImages := False;
FSearchDocuments := False;
FSearchAudio := False;
FSearchVideo := False;
FSearchWeb := False;
if CheckList = nil then
Exit;
for Idx := 0 to CheckList.Count - 1 do
begin
if not CheckList.Checked[Idx] then
Continue;
Txt := Trim(CheckList.Items[Idx]);
if StartsText('Image', Txt) then
FSearchImages := True
else if StartsText('Document', Txt) then
FSearchDocuments := True
else if StartsText('Audio', Txt) then
FSearchAudio := True
else if StartsText('Vidéo', Txt) or StartsText('Video', Txt) then
FSearchVideo := True
else if StartsText('Web Document', Txt) then
FSearchWeb := True
else
case Idx of
0:
FSearchImages := True;
1:
FSearchDocuments := True;
2:
FSearchAudio := True;
3:
FSearchVideo := True;
4:
FSearchWeb := True;
end;
end;
end;
end. |
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