// In Cloud mode, this function wraps around http GET.
// It fetches existing content from the cache, and caches new content.
string resource_logic_web_cache_get (string url, string & error)
{
// On the Cloud, check if the URL is in the cache.
if (!config_logic_client_prepared ()) {
if (database_filebased_cache_exists (url)) {
return database_filebased_cache_get (url);
}
}
// Fetch the URL from the network.
// Do not cache the response in an error situation.
error.clear ();
string html = filter_url_http_get (url, error);
if (!error.empty ()) {
return html;
}
// In the Cloud, cache the response.
if (!config_logic_client_prepared ()) {
database_filebased_cache_put (url, html);
}
// Done.
return html;
}
string sword_logic_get_text (string source, string module, int book, int chapter, int verse)
{
#ifdef HAVE_CLIENT
// Client checks for and optionally creates the cache for this SWORD module.
if (!Database_Cache::exists (module, book)) {
Database_Cache::create (module, book);
}
// If this module/passage exists in the cache, return it (it updates the access days in the cache).
if (Database_Cache::exists (module, book, chapter, verse)) {
return Database_Cache::retrieve (module, book, chapter, verse);
}
// Fetch this SWORD resource from the server.
string address = Database_Config_General::getServerAddress ();
int port = Database_Config_General::getServerPort ();
if (!client_logic_client_enabled ()) {
// If the client has not been connected to a cloud instance,
// fetch the SWORD content from the Bibledit Cloud demo.
address = demo_address ();
port = demo_port ();
}
string url = client_logic_url (address, port, sync_resources_url ());
string resource = "[" + source + "][" + module + "]";
url = filter_url_build_http_query (url, "r", resource);
url = filter_url_build_http_query (url, "b", convert_to_string (book));
url = filter_url_build_http_query (url, "c", convert_to_string (chapter));
url = filter_url_build_http_query (url, "v", convert_to_string (verse));
string error;
string html = filter_url_http_get (url, error, true);
// In case of an error, don't cache that error, but let the user see it.
if (!error.empty ()) return error;
// Client caches this info for later.
// Except in case of predefined responses from the Cloud.
if (html != sword_logic_installing_module_text ()) {
if (html != sword_logic_fetch_failure_text ()) {
Database_Cache::cache (module, book, chapter, verse, html);
}
}
return html;
#else
string module_text;
bool module_available = false;
string osis = Database_Books::getOsisFromId (book);
string chapter_verse = convert_to_string (chapter) + ":" + convert_to_string (verse);
// See notes on function sword_logic_diatheke
// for why it is not currently fetching content via a SWORD library call.
// module_text = sword_logic_diatheke (module, osis, chapter, verse, module_available);
// Running diatheke only works when it runs in the SWORD installation directory.
string sword_path = sword_logic_get_path ();
// Running several instances of diatheke simultaneously fails.
sword_logic_diatheke_run_mutex.lock ();
// The server fetches the module text as follows:
// diatheke -b KJV -k Jn 3:16
int result = filter_shell_vfork (module_text, sword_path, "diatheke", "-b", module.c_str(), "-k", osis.c_str(), chapter_verse.c_str());
sword_logic_diatheke_run_mutex.unlock ();
if (result != 0) return sword_logic_fetch_failure_text ();
// Touch the cache so the server knows that the module has been accessed just now.
string url = sword_logic_virtual_url (module, 0, 0, 0);
database_filebased_cache_get (url);
// If the module has not been installed, the output of "diatheke" will be empty.
// If the module was installed, but the requested passage is out of range,
// the output of "diatheke" contains the module name, so it won't be empty.
module_available = !module_text.empty ();
if (!module_available) {
// Check whether the SWORD module exists.
vector <string> modules = sword_logic_get_available ();
string smodules = filter_string_implode (modules, "");
if (smodules.find ("[" + module + "]") != string::npos) {
// Schedule SWORD module installation.
// (It used to be the case that this function, to get the text,
// would wait till the SWORD module was installed, and then after installation,
// return the text from that module.
// But due to long waiting on Bibledit demo, while it would install multiple modules,
// the Bibledit demo would become unresponsive.
// So, it's better to return immediately with an informative text.)
sword_logic_install_module_schedule (source, module);
// Return standard 'installing' information. Client knows not to cache this.
return sword_logic_installing_module_text ();
} else {
return "Cannot find SWORD module " + module;
}
}
// Remove any OSIS elements.
filter_string_replace_between (module_text, "<", ">", "");
// Remove the passage name that diatheke adds.
// A reliable signature for this is the chapter and verse plus subsequent colon.
size_t pos = module_text.find (" " + chapter_verse + ":");
if (pos != string::npos) {
pos += 2;
pos += chapter_verse.size ();
module_text.erase (0, pos);
}
// Remove the module name that diatheke adds.
module_text = filter_string_str_replace ("(" + module + ")", "", module_text);
// Clean whitespace away.
module_text = filter_string_trim (module_text);
return module_text;
#endif
return "";
}