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/* 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;
};
static ssize_t fetch_read(void *stream, void *ptr, size_t size)
{
struct apk_fetch_istream *fis = container_of(stream, struct apk_fetch_istream, is);
ssize_t i = 0, r;
if (ptr == NULL) return apk_istream_skip(&fis->is, size);
while (i < size) {
r = fetchIO_read(fis->fetchIO, ptr + i, size - i);
if (r < 0) return -EIO;
if (r == 0) break;
i += r;
}
return i;
}
static void fetch_close(void *stream)
{
struct apk_fetch_istream *fis = container_of(stream, struct apk_fetch_istream, is);
fetchIO_close(fis->fetchIO);
free(fis);
}
static struct apk_istream *apk_istream_fetch(const char *url, time_t since)
{
struct apk_fetch_istream *fis;
struct url *u;
fetchIO *io;
u = fetchParseURL(url);
if (!u) return NULL;
u->last_modified = since;
io = fetchGet(u, "i");
fetchFreeURL(u);
if (!io) {
if (fetchLastErrCode == FETCH_UNCHANGED) return ERR_PTR(-EALREADY);
return NULL;
}
fis = malloc(sizeof(*fis));
if (!fis) goto err;
*fis = (struct apk_fetch_istream) {
.is.read = fetch_read,
.is.close = fetch_close,
.fetchIO = io,
};
return &fis->is;
err:
if (io) fetchIO_close(io);
return NULL;
}
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_bstream_gunzip(apk_bstream_from_url(file));
}
struct apk_bstream *apk_bstream_from_fd_url_if_modified(int atfd, const char *url, time_t since)
{
if (apk_url_local_file(url) != NULL)
return apk_bstream_from_file(atfd, apk_url_local_file(url));
return apk_bstream_from_istream(apk_istream_fetch(url, since));
}
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