TekH
f1c8e223dd
Updated the `ComposeSignaturePreviewPng` method in the `IPdfPageImageRenderer` interface to return a `Stream` instead of a `byte[]` for improved memory efficiency when handling large image data. - Added `ComposeSignaturePreviewPngBytes` extension method to convert the `Stream` to a `byte[]` for backward compatibility. - Updated `PdfPageImageRenderer` to return a `Stream` and adjusted its internal logic to reset the `MemoryStream` position before returning. - Modified `DevSignatureInkController` to use the `Stream`-based implementation for HTTP responses. - Made minor formatting adjustments in `PdfPageImageRenderer`. These changes optimize memory usage while maintaining compatibility with existing workflows that require `byte[]`.
100 lines
3.7 KiB
C#
100 lines
3.7 KiB
C#
using DigitalData.Core.Abstraction.Application.Repository;
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using DevExpress.Drawing;
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using DevExpress.Pdf;
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using EnvelopeGenerator.Application.Common.Dto;
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using EnvelopeGenerator.Domain.Entities;
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using EnvelopeGenerator.Domain.Interfaces;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.EntityFrameworkCore;
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using EnvelopeGenerator.Application.Common.Interfaces.Doc;
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namespace EnvelopeGenerator.Server.Controllers;
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/// <summary>
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/// Temporary development endpoint to download stored signature ink image by element id.
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/// </summary>
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[ApiController]
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[AllowAnonymous]
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[Route("api/dev/signature-ink")]
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public class DevSignatureInkController(
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IRepository<DocReceiverElement> repository,
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IWebHostEnvironment environment,
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IConfiguration configuration,
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IPdfPageImageRenderer renderer) : ControllerBase
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{
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/// <summary>
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/// Downloads the signature image stored in INK for the given DocumentReceiverElement id.
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/// </summary>
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[HttpGet("{id:int}")]
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public async Task<IActionResult> DownloadInk([FromRoute] int id, CancellationToken cancel)
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{
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if (!IsEndpointEnabled())
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return NotFound();
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var element = await repository.Query
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.AsNoTracking()
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.Where(e => e.Id == id)
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.Select(e => new DocReceiverElementDto
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{
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Id = e.Id,
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Ink = e.Ink
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})
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.SingleOrDefaultAsync(cancel);
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if (element is null)
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return NotFound($"DocumentReceiverElement not found for id={id}.");
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if (element.Ink is not { Length: > 0 })
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return NotFound($"No signature image (Ink) found for id={id}.");
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var image = element.ToImage();
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return File(image.Bytes, image.ContentType, $"signature-ink-{id}{image.FileExtension}");
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}
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/// <summary>
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/// Downloads a composed signature image (background + ink + signer metadata) for the given element id.
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/// </summary>
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[HttpGet("{id:int}/composed")]
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public async Task<IActionResult> DownloadComposedInk([FromRoute] int id, CancellationToken cancel)
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{
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if (!IsEndpointEnabled())
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return NotFound();
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var element = await repository.Query
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.AsNoTracking()
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.Where(e => e.Id == id)
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.Select(e => new DocReceiverElementDto
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{
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Id = e.Id,
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Ink = e.Ink,
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FullName = e.FullName,
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Position = e.Position,
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Place = e.Place,
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ChangedWhen = e.ChangedWhen
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})
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.SingleOrDefaultAsync(cancel);
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if (element is null)
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return NotFound($"DocumentReceiverElement not found for id={id}.");
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if (element.Ink is not { Length: > 0 })
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return NotFound($"No signature image (Ink) found for id={id}.");
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if (element.ChangedWhen is null)
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return Conflict($"DocumentReceiverElement id={id} has null ChangedWhen. Element is not signed yet or data integrity is broken.");
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if (string.IsNullOrWhiteSpace(element.FullName) || string.IsNullOrWhiteSpace(element.Place))
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return Conflict($"DocumentReceiverElement id={id} is missing signer metadata (FullName or Place).");
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if (!renderer.IsSupportedImageFormat(element.Ink!))
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return StatusCode(StatusCodes.Status415UnsupportedMediaType);
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var composedStream = renderer.ComposeSignaturePreviewPng(element);
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return File(composedStream, "image/png", $"signature-composed-{id}.png");
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}
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private bool IsEndpointEnabled()
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=> environment.IsDevelopment() || configuration.GetValue<bool>("DevEndpoints:EnableSignatureInkInProduction");
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}
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