Delphi ve C++Builder uygulamalarına PDFium VCL Component iş akışlarını, Lazarus/FPC projelerine PDFium LCL Component iş akışlarını; görüntüleme, render, formlar, yazdırma, preflight raporları ve standart odaklı doğrulama için kaynak kodlu bileşenlerle ekleyin.
Bu yazı teams triaging incoming PDFs before routing them to compliance, support, conversion, or data-entry workflows için hazırlanmıştır. PDF intake and review workbench konusunu tek bir bileşen çağrısı olarak değil, üretim düzeyinde belge mühendisliği olarak ele alır.
Pratik risk şudur: intake tools become unreliable when preview, metadata, warnings, annotations, security state, and operator decisions live in separate screens. Bu nedenle akışın yazılı sözleşmeye, gözlemlenebilir tanılara ve gerçekçi regresyon dosyalarına ihtiyacı vardır.
Mimari kararlar
Create one intake record per document. intake states such as new, blocked, needs review, ready, rejected, and archived / metadata fields, warnings, thumbnail strategy, and operator notes
- intake states such as new, blocked, needs review, ready, rejected, and archived
- metadata fields, warnings, thumbnail strategy, and operator notes
- routing rules for encrypted, signed, damaged, image-only, or oversized files
- retention policy for original files, previews, reports, and review decisions
Uygulama akışı
Summarize document risk before routing. Aşağıdaki sıra, iş akışını Delphi ve C++Builder ekipleri için incelenebilir tutar.
- create an intake record before rendering pages or modifying the file
- collect metadata, security state, page count, text availability, and warnings
- generate thumbnails and preview pages without changing the source document
- surface blockers and recommended routing actions to the operator
- store the final decision with enough evidence for downstream teams
Doğrulama kanıtı
Intake evidence that supports hand-off. Bu alanları çıktı veya destek kaydıyla birlikte saklayın.
- source path, hash, page count, metadata, encryption status, and signature status
- warnings for forms, annotations, attachments, damaged objects, or missing text
- operator decision, routing destination, comment, and time of hand-off
- preview generation status and reason when a file cannot be previewed
Preview should explain, not just display
A review workbench should make document facts visible: page count, encryption, forms, annotations, attachments, signatures, metadata, text availability, and validation findings. Operators can then route a file without guessing.
Support package design
Once PDFium Component is deployed, the most valuable support package is the one that explains the input, profile, output, and exact stage that failed.
- source path, hash, page count, metadata, encryption status, and signature status
- warnings for forms, annotations, attachments, damaged objects, or missing text
- operator decision, routing destination, comment, and time of hand-off
- preview generation status and reason when a file cannot be previewed
- terminology snapshot: intake, review workbench, thumbnail, metadata
Mühendislik inceleme notları: PDF intake and review workbench
Özelliğin bir demoyu aşıp sürüm, destek ve müşteri eskalasyonu sırasında savunulabilir olduğunu doğrulamak için bu inceleme notlarını kullanın.
- Karar: intake states such as new, blocked, needs review, ready, rejected, and archived. Uygulama baskı noktası: collect metadata, security state, page count, text availability, and warnings. Kabul kanıtı: operator decision, routing destination, comment, and time of hand-off. Regresyon tetikleyicisi: oversized files need queue limits and operator feedback rather than silent delays
- Karar: metadata fields, warnings, thumbnail strategy, and operator notes. Uygulama baskı noktası: generate thumbnails and preview pages without changing the source document. Kabul kanıtı: preview generation status and reason when a file cannot be previewed. Regresyon tetikleyicisi: password-protected files need a secure credential hand-off or a blocked state
- Karar: routing rules for encrypted, signed, damaged, image-only, or oversized files. Uygulama baskı noktası: surface blockers and recommended routing actions to the operator. Kabul kanıtı: source path, hash, page count, metadata, encryption status, and signature status. Regresyon tetikleyicisi: image-only files should not be routed to text extraction without a warning
- Karar: retention policy for original files, previews, reports, and review decisions. Uygulama baskı noktası: store the final decision with enough evidence for downstream teams. Kabul kanıtı: warnings for forms, annotations, attachments, damaged objects, or missing text. Regresyon tetikleyicisi: signed documents may require read-only review to preserve trust
- Karar: intake states such as new, blocked, needs review, ready, rejected, and archived. Uygulama baskı noktası: create an intake record before rendering pages or modifying the file. Kabul kanıtı: operator decision, routing destination, comment, and time of hand-off. Regresyon tetikleyicisi: oversized files need queue limits and operator feedback rather than silent delays
Sınır durumları
- password-protected files need a secure credential hand-off or a blocked state
- image-only files should not be routed to text extraction without a warning
- signed documents may require read-only review to preserve trust
- oversized files need queue limits and operator feedback rather than silent delays
Delphi / C++Builder notes
PDFium Component should sit behind a small service boundary that receives files, streams, profiles, and credentials, then returns output paths, warnings, metrics, and validation status. Important terms include intake, review workbench, thumbnail, metadata, routing, document risk.
Delphi kod örneği
Aşağıdaki Delphi taslağı bu konu için pratik bir servis sınırını gösterir. Politika kontrollerini, günlüklemeyi ve doğrulamayı dar ürün çağrısı bölümünün dışında tutarak akışı test edilebilir bırakın.
procedure TIntakeWorkbench.OpenForReview(const FileName: string);
begin
PdfView.LoadFromFile(FileName);
FCaseId := CreateReviewCase(FileName, PdfView.PageCount);
FFindings := RunIntakeChecks(PdfView);
RenderThumbnailStrip;
BindFindingsToGrid(FFindings);
end;Üretim kontrol listesi
- İş akışını boş bir dosyada, normal bir müşteri dosyasında ve en kötü durum dosyasında çalıştırın
- Oluşturulan PDF'yi hedef görüntüleyici, doğrulayıcı, yazıcı veya aşağı akış uygulamasıyla açın
- Ürün sürümünü, profil sürümünü, giriş karmasını, çıktı yolunu, geçen süreyi ve uyarı sayısını kaydedin
- Parolaları, sertifikaları, geçici dosyaları ve müşteri verilerini açık saklama kuralları altında tutun
- Bir müşteri dosyası yeni bir uç durum ortaya çıkardığında regresyon belgeleri ekleyin
Ürün belgeleri
Ek kod örnekleri
procedure CollectIdentity(Pdf: TPdf; const FilePath: string;
var Rec: TIntakeRecord);
begin
Rec.Title := Pdf.Title; // Info dictionary value
Rec.Author := Pdf.Author;
Rec.CreatedAt := Pdf.CreationDate; // raw PDF date string ("D:2026...")
// An empty Info title does not mean the document is untitled. The
// component does not expose the XMP packet, so probe the raw file
// bytes for the dc:title element before trusting the blank.
if (Rec.Title = '') and FileContainsText(FilePath, 'dc:title') then
Include(Rec.Flags, ifTitleInXmpOnly);
end;procedure CollectRiskSignals(Pdf: TPdf; var Rec: TIntakeRecord);
var
i, PageNo: Integer;
Ext: string;
begin
Rec.IsEncrypted := Assigned(FPDF_GetSecurityHandlerRevision) and
(FPDF_GetSecurityHandlerRevision(Pdf.Document) <> -1);
Rec.HasForms := Pdf.FormType <> ftNone;
Rec.IsXfa := Pdf.FormType = ftXfaFull;
Rec.HasJavaScript := Pdf.JavaScriptActionCount > 0;
// AnnotationCount is a per-page property; walk the pages to total
// it. Loading a page object renders nothing, so this stays cheap.
Rec.Annotations := 0;
for PageNo := 1 to Pdf.PageCount do
begin
Pdf.PageNumber := PageNo;
Inc(Rec.Annotations, Pdf.AnnotationCount);
end;
Rec.Attachments := Pdf.AttachmentCount;
for i := 0 to Rec.Attachments - 1 do
begin
Ext := LowerCase(ExtractFileExt(string(Pdf.AttachmentName[i])));
if (Ext = '.exe') or (Ext = '.js') or (Ext = '.vbs') or (Ext = '.dll') then
Include(Rec.Flags, ifDangerousAttachment);
end;
end;