Handling of /meta?name=Illustration_WxH@1 requests

src/book.cpp

@@ -104,7 +104,7 @@ void Book::update(const zim::Archive& archive) {
   m_mediaCount = getArchiveMediaCount(archive);
   m_size = static_cast<uint64_t>(getArchiveFileSize(archive)) << 10;
 
-  getArchiveFavicon(archive, m_favicon, m_faviconMimeType);
+  getArchiveFavicon(archive, 48, m_favicon, m_faviconMimeType);
 }
 
 #define ATTR(name) node.attribute(name).value()

src/reader.cpp

@@ -134,7 +134,7 @@ Entry Reader::getMainPage() const
 
 bool Reader::getFavicon(string& content, string& mimeType) const
 {
-  return kiwix::getArchiveFavicon(*zimArchive, content, mimeType);
+  return kiwix::getArchiveFavicon(*zimArchive, 48, content, mimeType);
 }
 
 string Reader::getZimFilePath() const

src/server/internalServer.cpp

@@ -94,6 +94,16 @@ inline std::string normalizeRootUrl(std::string rootUrl)
   return rootUrl.empty() ? rootUrl : "/" + rootUrl;
 }
 
+unsigned parseIllustration(const std::string& s)
+{
+  int nw(0), nh(0), nEnd(0);
+  long int w(-1), h(-1);
+  if ( sscanf(s.c_str(), "Illustration_%n%ldx%n%ld@1%n)", &nw, &w, &nh, &h, &nEnd) == 2
+     && nEnd == (int)s.size() && !isspace(s[nw]) && !isspace(s[nh]) && w == h && w >= 0) {
+    return w;
+  }
+  return 0;
+}
 } // unnamed namespace
 
 static IdNameMapper defaultNameMapper;
@@ -408,7 +418,9 @@ std::unique_ptr<Response> InternalServer::handle_meta(const RequestContext& requ
   } else if (meta_name == "publisher") {
     content = getMetaPublisher(*archive);
   } else if (meta_name == "favicon") {
-    getArchiveFavicon(*archive, content, mimeType);
+    getArchiveFavicon(*archive, 48, content, mimeType);
+  } else if (const unsigned illustrationSize = parseIllustration(meta_name)) {
+    getArchiveFavicon(*archive, illustrationSize, content, mimeType);
   } else {
     return Response::build_404(*this, request, bookName, "");
   }

src/tools/archiveTools.cpp

@@ -97,10 +97,10 @@ std::string getArchiveId(const zim::Archive& archive) {
   return (std::string) archive.getUuid();
 }
 
-bool getArchiveFavicon(const zim::Archive& archive,
+bool getArchiveFavicon(const zim::Archive& archive, unsigned size,
                            std::string& content, std::string& mimeType){
   try {
-    auto item = archive.getIllustrationItem();
+    auto item = archive.getIllustrationItem(size);
     content = item.getData();
     mimeType = item.getMimetype();
     return true;

src/tools/archiveTools.h

@@ -42,7 +42,7 @@ namespace kiwix
     std::string getMetaFlavour(const zim::Archive& archive);
     std::string getArchiveId(const zim::Archive& archive);
 
-    bool getArchiveFavicon(const zim::Archive& archive,
+    bool getArchiveFavicon(const zim::Archive& archive, unsigned size,
                            std::string& content, std::string& mimeType);
 
     unsigned int getArchiveMediaCount(const zim::Archive& archive);

test/server.cpp

@@ -197,6 +197,7 @@ const ResourceCollection resources200Uncompressible{
   { WITH_ETAG, "/meta?content=zimfile&name=creator" },
   { WITH_ETAG, "/meta?content=zimfile&name=publisher" },
   { WITH_ETAG, "/meta?content=zimfile&name=favicon" },
+  { WITH_ETAG, "/meta?content=zimfile&name=Illustration_48x48@1" },
 
   { WITH_ETAG, "/zimfile/I/m/Ray_Charles_classic_piano_pose.jpg" },