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-rw-r--r--src/io_url.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/io_url.c b/src/io_url.c
new file mode 100644
index 0000000..cd3f26c
--- /dev/null
+++ b/src/io_url.c
@@ -0,0 +1,156 @@
+/* io_url.c - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation. See http://www.gnu.org/ for details.
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include <fetch.h>
+
+#include "apk_io.h"
+
+const char *apk_url_local_file(const char *url)
+{
+ if (strncmp(url, "file:", 5) == 0)
+ return &url[5];
+
+ if (strncmp(url, "http:", 5) != 0 &&
+ strncmp(url, "https:", 6) != 0 &&
+ strncmp(url, "ftp:", 4) != 0)
+ return url;
+
+ return NULL;
+}
+
+struct apk_fetch_istream {
+ struct apk_istream is;
+ fetchIO *fetchIO;
+ struct url_stat urlstat;
+};
+
+static int fetch_maperror(int ec)
+{
+ static const signed short map[] = {
+ [FETCH_ABORT] = -ECONNABORTED,
+ [FETCH_AUTH] = -EACCES,
+ [FETCH_DOWN] = -ECONNREFUSED,
+ [FETCH_EXISTS] = -EEXIST,
+ [FETCH_FULL] = -ENOSPC,
+ /* [FETCH_INFO] = , */
+ [FETCH_MEMORY] = -ENOMEM,
+ [FETCH_MOVED] = -ENOENT,
+ [FETCH_NETWORK] = -ENETUNREACH,
+ /* [FETCH_OK] = , */
+ [FETCH_PROTO] = -EPROTO,
+ [FETCH_RESOLV] = -ENXIO,
+ [FETCH_SERVER] = -EREMOTEIO,
+ [FETCH_TEMP] = -EAGAIN,
+ [FETCH_TIMEOUT] = -ETIMEDOUT,
+ [FETCH_UNAVAIL] = -ENOENT,
+ [FETCH_UNKNOWN] = -EIO,
+ [FETCH_URL] = -EAPKBADURL,
+ [FETCH_UNCHANGED] = -EALREADY,
+ };
+
+ if (ec < 0 || ec >= ARRAY_SIZE(map) || !map[ec]) return -EIO;
+ return map[ec];
+}
+
+static void fetch_get_meta(struct apk_istream *is, struct apk_file_meta *meta)
+{
+ struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
+
+ *meta = (struct apk_file_meta) {
+ .atime = fis->urlstat.atime,
+ .mtime = fis->urlstat.mtime,
+ };
+}
+
+static ssize_t fetch_read(struct apk_istream *is, void *ptr, size_t size)
+{
+ struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
+ ssize_t r;
+
+ r = fetchIO_read(fis->fetchIO, ptr, size);
+ if (r < 0) return -EIO;
+ return r;
+}
+
+static void fetch_close(struct apk_istream *is)
+{
+ struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
+
+ fetchIO_close(fis->fetchIO);
+ free(fis);
+}
+
+static const struct apk_istream_ops fetch_istream_ops = {
+ .get_meta = fetch_get_meta,
+ .read = fetch_read,
+ .close = fetch_close,
+};
+
+static struct apk_istream *apk_istream_fetch(const char *url, time_t since)
+{
+ struct apk_fetch_istream *fis = NULL;
+ struct url *u;
+ fetchIO *io = NULL;
+ int rc = -EIO;
+
+ u = fetchParseURL(url);
+ if (!u) {
+ rc = -EAPKBADURL;
+ goto err;
+ }
+ fis = malloc(sizeof *fis + apk_io_bufsize);
+ if (!fis) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+ u->last_modified = since;
+ io = fetchXGet(u, &fis->urlstat, (apk_force & APK_FORCE_REFRESH) ? "Ci" : "i");
+ if (!io) {
+ rc = fetch_maperror(fetchLastErrCode);
+ goto err;
+ }
+
+ *fis = (struct apk_fetch_istream) {
+ .is.ops = &fetch_istream_ops,
+ .is.buf = (uint8_t*)(fis+1),
+ .is.buf_size = apk_io_bufsize,
+ .fetchIO = io,
+ .urlstat = fis->urlstat,
+ };
+ fetchFreeURL(u);
+
+ return &fis->is;
+err:
+ if (u) fetchFreeURL(u);
+ if (io) fetchIO_close(io);
+ if (fis) free(fis);
+ return ERR_PTR(rc);
+}
+
+struct apk_istream *apk_istream_from_fd_url_if_modified(int atfd, const char *url, time_t since)
+{
+ if (apk_url_local_file(url) != NULL)
+ return apk_istream_from_file(atfd, apk_url_local_file(url));
+ return apk_istream_fetch(url, since);
+}
+
+struct apk_istream *apk_istream_from_url_gz(const char *file)
+{
+ return apk_istream_gunzip(apk_istream_from_url(file));
+}