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fix

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This commit is contained in:
Stefan Hardegger
2026-06-08 09:41:56 +02:00
parent f4908637b3
commit a2ed2f7b79
1 changed files with 41 additions and 10 deletions
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43
backend/src/main/java/com/storycove/service/EPUBImportService.java
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@@ -481,20 +481,25 @@ public class EPUBImportService {
return htmlContent;
}
// Index all image resources by href and by bare filename for flexible lookup
// Index all image resources by href and by bare filename for flexible lookup.
// Also index resources whose media type epublib could not recognise (returns null for formats
// like WebP that are absent from its built-in type registry) by falling back to the href extension.
Map<String, Resource> byHref = new HashMap<>();
Map<String, Resource> byFilename = new HashMap<>();
for (Resource resource : book.getResources().getAll()) {
if (resource.getMediaType() != null &&
resource.getMediaType().toString().startsWith("image/")) {
String href = resource.getHref();
if (href != null) {
if (href == null) continue;
boolean isImageByMediaType = resource.getMediaType() != null &&
resource.getMediaType().toString().startsWith("image/");
boolean isImageByExtension = hasImageExtension(href);
if (isImageByMediaType || isImageByExtension) {
byHref.put(href, resource);
String filename = href.contains("/") ? href.substring(href.lastIndexOf('/') + 1) : href;
byFilename.putIfAbsent(filename, resource);
}
}
}
if (byHref.isEmpty()) {
log.debug("No image resources found in EPUB for story: {}", storyId);
@@ -530,7 +535,7 @@ public class EPUBImportService {
}
String mediaType = resource.getMediaType() != null ?
resource.getMediaType().toString() : "image/jpeg";
resource.getMediaType().toString() : getMediaTypeFromHref(resource.getHref());
String extension = getExtensionFromMediaType(mediaType);
String filename = "epub-img-" + System.currentTimeMillis() + "-" +
(int) (Math.random() * 100000) + "." + extension;
@@ -620,6 +625,32 @@ public class EPUBImportService {
}
}
/**
* Determine MIME type from the file extension in an EPUB resource href.
* Used as a fallback when epublib does not recognise the media type (e.g. WebP).
*/
private String getMediaTypeFromHref(String href) {
if (href == null) return "image/jpeg";
String lower = href.toLowerCase();
if (lower.endsWith(".png")) return "image/png";
if (lower.endsWith(".gif")) return "image/gif";
if (lower.endsWith(".webp")) return "image/webp";
if (lower.endsWith(".svg")) return "image/svg+xml";
return "image/jpeg"; // covers .jpg, .jpeg and unknown formats
}
/**
* Returns true if the href path ends with a known image file extension.
* Used to index EPUB resources whose media type epublib could not determine.
*/
private boolean hasImageExtension(String href) {
if (href == null) return false;
String lower = href.toLowerCase();
return lower.endsWith(".jpg") || lower.endsWith(".jpeg") ||
lower.endsWith(".png") || lower.endsWith(".gif") ||
lower.endsWith(".webp") || lower.endsWith(".svg");
}
private ReadingPositionDto convertToDto(ReadingPosition position) {
if (position == null) return null;