Hash cache entries; replace string/unixdate attrs with TIME 'when' attr

Makefile

@@ -69,7 +69,7 @@ RSRCS = \
 #	- 	if your library does not follow the standard library naming scheme,
 #		you need to specify the path to the library and it's name.
 #		(e.g. for mylib.a, specify "mylib.a" or "path/mylib.a")
-LIBS =  be tracker shared tinyxml2 bnetapi network $(STDCPPLIBS)
+LIBS =  be tracker bnetapi network shared tinyxml2 $(STDCPPLIBS)
 
 #	Specify additional paths to directories following the standard libXXX.so
 #	or libXXX.a naming scheme. You can specify full paths or paths relative

src/Feed.cpp

@@ -10,7 +10,7 @@ Feed::Feed ( BString path, Config* cfg )
 	description = BString( "Nondescript, N/A." );
 	homeUrl = BString("");
 	xmlUrl = BString("");
-
+	updated = true;
 	filePath = GetCachePath( path, cfg );
 }
 
@@ -24,28 +24,48 @@ Feed::Feed ( ) {
 // ----------------------------------------------------------------------------
 
 BString
-Feed::GetCachePath ( BString falsePath, Config* cfg )
+Feed::GetCachePath ( BString givenPath, Config* cfg )
 {
-	BUrl falseUrl = BUrl(falsePath);
-	BString protocol = falseUrl.Protocol().String();
+	BUrl givenUrl = BUrl( givenPath );
+	BString protocol = givenUrl.Protocol().String();
 
-	if ( protocol == NULL && falseUrl.UrlString() != NULL )
-		return falsePath;
+	if ( protocol == NULL && givenUrl.UrlString() != NULL )
+		return givenPath;
 	if ( protocol != BString("http")  &&  protocol != BString("https") )
 		return NULL;
 
-	BString splitName = falseUrl.Host( );
-	splitName.Append( falseUrl.Path() );
+	return FetchRemoteFeed( givenPath, cfg );
+}
+
+BString
+Feed::FetchRemoteFeed ( BString givenPath, Config* cfg )
+{
+	BUrl givenUrl = BUrl( givenPath );
+	BString* newHash = new BString();
+	char oldHash[41];
+
+	BString splitName = givenUrl.Host( );
+	splitName.Append( givenUrl.Path() );
 	splitName.ReplaceAll("/", "_");
 
 	BString filename = cfg->cacheDir;
 	filename.Append(splitName);
 	BFile* cacheFile = new BFile( filename, B_READ_WRITE | B_CREATE_FILE );
 
-	if ( cfg->verbose )
-		printf( "Saving %s to %s...\n", falsePath.String(), filename.String() );
+	cacheFile->ReadAttr( "FeedSum", B_STRING_TYPE, 0,
+			     oldHash, 41 );
+
+	if ( cfg->verbose )
+		printf( "Saving %s...\n", givenPath.String() );
+
+	webFetch( givenUrl, cacheFile, newHash );
+
+	cacheFile->WriteAttr( "FeedSum", B_STRING_TYPE, 0,
+			      newHash->String(), newHash->CountChars() );
+
+	if ( *(newHash) == BString(oldHash) )
+		updated = false;
 
-	webFetch( falseUrl, cacheFile );
 	return filename;
 }
 

src/Feed.h

@@ -16,11 +16,13 @@ public:
 	BString	title;
 	BString	description;
 	BDateTime date;
+	BDateTime lastDate;
 	BString	homeUrl;
 	BString	xmlUrl;
 	BString	filePath;
 	BString outputDir;
 	BList	entries;
+	bool	updated;
 
 	void	Parse	( Config* );
 
@@ -38,6 +40,7 @@ public:
 
 protected:
 	BString GetCachePath ( BString, Config* );
+	BString FetchRemoteFeed ( BString, Config* );
 	int	xmlCountSiblings ( tinyxml2::XMLElement*, const char* );
 };
 

src/Pogger.cpp

@@ -148,14 +148,12 @@ processFeed ( void* feedArg )
 	BList entries;
 
 	if ( testFeed->IsAtom() ) {
-		printf("Atom\n");
 		AtomFeed* feed = (AtomFeed*)malloc( sizeof(AtomFeed) );
 		feed = new AtomFeed( testFeed->filePath, main_cfg );
 		feed->Parse(main_cfg);
 		entries = feed->entries;
 	}
 	if ( testFeed->IsRss() ) {
-		printf("RSS\n");
 		RssFeed* feed = (RssFeed*)malloc( sizeof(RssFeed) );
 		feed = new RssFeed( testFeed->filePath, main_cfg );
 		feed->Parse(main_cfg);

src/ProtocolListener.cpp

@@ -1,5 +1,8 @@
+#include <iostream>
+#include <sstream>
 #include <UrlProtocolListener.h>
 #include <Url.h>
+#include <boost/uuid/detail/sha1.hpp>
 #include "ProtocolListener.h"
 
 ProtocolListener::ProtocolListener ( bool traceLogging )
@@ -16,6 +19,8 @@ ProtocolListener::DataReceived ( BUrlRequest* caller, const char* data, off_t po
 {
 	if ( fDownloadIO != NULL )
 		fDownloadIO->Write( data, size );
+	if ( fSha1 != NULL )
+		fSha1->process_bytes( data,  size );
 }
 
 void
@@ -29,3 +34,30 @@ ProtocolListener::GetDownloadIO ( )
 {
 	return fDownloadIO;
 }
+
+void
+ProtocolListener::SetSha1 ( boost::uuids::detail::sha1* sha1 )
+{
+	fSha1 = sha1;
+}
+
+boost::uuids::detail::sha1*
+ProtocolListener::GetSha1 ( )
+{
+	return fSha1;
+}
+
+BString
+ProtocolListener::GetHash ( )
+{
+	unsigned int hashInt[5];
+	fSha1->get_digest( hashInt );
+
+	std::ostringstream hashStr;
+	for(std::size_t i=0; i<sizeof(hashInt)/sizeof(hashInt[0]); ++i) {
+		hashStr << std::hex <<hashInt[i];
+	}
+
+	return BString( hashStr.str().c_str() );
+}
+

src/ProtocolListener.h

@@ -3,6 +3,7 @@
 
 #include <UrlProtocolListener.h>
 #include <Url.h>
+#include <boost/uuid/detail/sha1.hpp>
 
 class ProtocolListener : public BUrlProtocolListener
 {
@@ -11,11 +12,17 @@ public:
 
 	virtual ~ProtocolListener();
 	virtual void DataReceived(BUrlRequest*, const char*, off_t, ssize_t);
+
 	void SetDownloadIO ( BDataIO* );
 	BDataIO* GetDownloadIO ( );
 
+	void SetSha1 ( boost::uuids::detail::sha1* );
+	boost::uuids::detail::sha1* GetSha1 ( );
+	BString GetHash ( );
+
 private:
 	BDataIO*	fDownloadIO;
+	boost::uuids::detail::sha1* fSha1;
 	bool		fTraceLogging;
 };
 

src/Util.cpp

@@ -4,6 +4,7 @@
 #include <iomanip>
 #include <DateTime.h>
 #include <HttpRequest.h>
+#include <boost/uuid/detail/sha1.hpp>
 #include "ProtocolListener.h"
 #include "Util.h"
 
@@ -73,25 +74,30 @@ withinDateRange ( BDateTime minDate, BDateTime nowDate, BDateTime maxDate )
 // ----------------------------------------------------------------------------
 
 int32
-webFetch ( char* strUrl, BDataIO* reply )
+webFetch ( BUrl url, BDataIO* reply )
 {
-	return webFetch( BUrl(strUrl), reply );
+	BString* ignored = new BString();
+	return webFetch( url, reply, ignored );
 }
 
 
 int32
-webFetch ( BUrl url, BDataIO* reply )
+webFetch ( BUrl url, BDataIO* reply, BString* hash )
 {
 	ProtocolListener listener(true);
 	BUrlContext context;
+	boost::uuids::detail::sha1 sha1;
 
 	BHttpRequest request( url, true, "HTTP", &listener, &context );
 
 	listener.SetDownloadIO( reply );
+	listener.SetSha1( &sha1 );
 
 	thread_id thread = request.Run();
 	wait_for_thread( thread, NULL );
 
+	*(hash) = listener.GetHash();
+
 	const BHttpResult& result = dynamic_cast<const BHttpResult&>( request.Result() );
 	return result.StatusCode();
 }

src/Util.h

@@ -14,8 +14,7 @@ BString dateTo3339String	( BDateTime );
 
 bool withinDateRange ( BDateTime, BDateTime, BDateTime );
 
+int32 webFetch	( BUrl,  BDataIO*, BString* );
 int32 webFetch	( BUrl,  BDataIO* );
-int32 webFetch	( char*, BDataIO* );
-
 
 #endif