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fix: Prefer epub format over derived formats when downloading from opds server (#1480)

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## Summary

* **What is the goal of this PR?** Prefer epub format over kepub or
other formats offered from an OPDS server
* **What changes are included?**

## Additional Context

Should address #1419 

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**<  NO >**_

---------

Co-authored-by: Arthur Tazhitdinov <lisnake@gmail.com>
This commit is contained in:
jpirnay
2026-05-20 11:46:11 -05:00
committed by GitHub
co-authored by Arthur Tazhitdinov
parent 3800179595
commit a7aa4c55d8
1 changed files with 10 additions and 2 deletions
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lib/OpdsParser/OpdsParser.cpp
+10 -2
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@@ -110,8 +110,16 @@ void XMLCALL OpdsParser::startElement(void* userData, const XML_Char* name, cons
if (self->inEntry) {
if (rel && type && strstr(rel, "opds-spec.org/acquisition") != nullptr &&
strcmp(type, "application/epub+zip") == 0) {
self->currentEntry.type = OpdsEntryType::BOOK;
self->currentEntry.href = href;
// Prefer plain EPUB links over derived formats when multiple
// acquisition links are present for one entry.
const bool isPlainEpub = strstr(href, ".epub") != nullptr || strstr(href, "/epub/") != nullptr;
const bool alreadyHasPlainEpub = self->currentEntry.type == OpdsEntryType::BOOK &&
(self->currentEntry.href.find(".epub") != std::string::npos ||
self->currentEntry.href.find("/epub/") != std::string::npos);
if (self->currentEntry.type != OpdsEntryType::BOOK || (isPlainEpub && !alreadyHasPlainEpub)) {
self->currentEntry.type = OpdsEntryType::BOOK;
self->currentEntry.href = href;
}
} else if (type && strstr(type, "application/atom+xml") != nullptr) {
if (self->currentEntry.type != OpdsEntryType::BOOK) {
self->currentEntry.type = OpdsEntryType::NAVIGATION;