io,url,db: support for if-modified-since

1 files changed, 21 insertions, 4 deletions

diff --git a/src/apk_io.h b/src/apk_io.h
index c61fc6e..82102aa 100644
--- a/src/apk_io.h
+++ b/src/apk_io.h
@@ -14,6 +14,7 @@
 #include <sys/types.h>
 #include <openssl/evp.h>
 #include <fcntl.h>
+#include <time.h>
 
 #include "apk_defines.h"
 #include "apk_blob.h"
@@ -78,7 +79,7 @@ struct apk_ostream *apk_ostream_counter(off_t *);
 struct apk_istream *apk_istream_from_fd_pid(int fd, pid_t pid, int (*translate_status)(int));
 struct apk_istream *apk_istream_from_file(int atfd, const char *file);
 struct apk_istream *apk_istream_from_file_gz(int atfd, const char *file);
-struct apk_istream *apk_istream_from_fd_url(int atfd, const char *url);
+struct apk_istream *apk_istream_from_fd_url_if_modified(int atfd, const char *url, time_t since);
 struct apk_istream *apk_istream_from_url_gz(const char *url);
 size_t apk_istream_skip(struct apk_istream *istream, size_t size);
 
@@ -92,13 +93,21 @@ static inline struct apk_istream *apk_istream_from_fd(int fd)
 }
 static inline struct apk_istream *apk_istream_from_url(const char *url)
 {
-	return apk_istream_from_fd_url(AT_FDCWD, url);
+	return apk_istream_from_fd_url_if_modified(AT_FDCWD, url, 0);
+}
+static inline struct apk_istream *apk_istream_from_fd_url(int atfd, const char *url)
+{
+	return apk_istream_from_fd_url_if_modified(atfd, url, 0);
+}
+static inline struct apk_istream *apk_istream_from_url_if_modified(const char *url, time_t since)
+{
+	return apk_istream_from_fd_url_if_modified(AT_FDCWD, url, since);
 }
 
 struct apk_bstream *apk_bstream_from_istream(struct apk_istream *istream);
 struct apk_bstream *apk_bstream_from_fd_pid(int fd, pid_t pid, int (*translate_status)(int));
 struct apk_bstream *apk_bstream_from_file(int atfd, const char *file);
-struct apk_bstream *apk_bstream_from_fd_url(int atfd, const char *url);
+struct apk_bstream *apk_bstream_from_fd_url_if_modified(int atfd, const char *url, time_t since);
 struct apk_bstream *apk_bstream_tee(struct apk_bstream *from, int atfd, const char *to,
 				    apk_progress_cb cb, void *cb_ctx);
 
@@ -109,7 +118,15 @@ static inline struct apk_bstream *apk_bstream_from_fd(int fd)
 
 static inline struct apk_bstream *apk_bstream_from_url(const char *url)
 {
-	return apk_bstream_from_fd_url(AT_FDCWD, url);
+	return apk_bstream_from_fd_url_if_modified(AT_FDCWD, url, 0);
+}
+static inline struct apk_bstream *apk_bstream_from_fd_url(int fd, const char *url)
+{
+	return apk_bstream_from_fd_url_if_modified(fd, url, 0);
+}
+static inline struct apk_bstream *apk_bstream_from_url_if_modified(const char *url, time_t since)
+{
+	return apk_bstream_from_fd_url_if_modified(AT_FDCWD, url, since);
 }
 
 struct apk_ostream *apk_ostream_to_fd(int fd);