157 lines
3.4 KiB
C
157 lines
3.4 KiB
C
/* io_url.c - Alpine Package Keeper (APK)
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*
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* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
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* Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <fetch.h>
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#include "apk_io.h"
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const char *apk_url_local_file(const char *url)
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{
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if (strncmp(url, "file:", 5) == 0)
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return &url[5];
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if (strncmp(url, "http:", 5) != 0 &&
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strncmp(url, "https:", 6) != 0 &&
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strncmp(url, "ftp:", 4) != 0)
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return url;
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return NULL;
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}
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struct apk_fetch_istream {
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struct apk_istream is;
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fetchIO *fetchIO;
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struct url_stat urlstat;
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};
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static int fetch_maperror(int ec)
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{
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static const signed short map[] = {
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[FETCH_ABORT] = -ECONNABORTED,
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[FETCH_AUTH] = -EACCES,
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[FETCH_DOWN] = -ECONNREFUSED,
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[FETCH_EXISTS] = -EEXIST,
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[FETCH_FULL] = -ENOSPC,
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/* [FETCH_INFO] = , */
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[FETCH_MEMORY] = -ENOMEM,
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[FETCH_MOVED] = -ENOENT,
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[FETCH_NETWORK] = -ENETUNREACH,
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/* [FETCH_OK] = , */
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[FETCH_PROTO] = -EPROTO,
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[FETCH_RESOLV] = -APKE_DNS,
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[FETCH_SERVER] = -APKE_REMOTE_IO,
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[FETCH_TEMP] = -EAGAIN,
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[FETCH_TIMEOUT] = -ETIMEDOUT,
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[FETCH_UNAVAIL] = -ENOENT,
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[FETCH_UNKNOWN] = -EIO,
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[FETCH_URL] = -APKE_URL_FORMAT,
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[FETCH_UNCHANGED] = -EALREADY,
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};
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if (ec < 0 || ec >= ARRAY_SIZE(map) || !map[ec]) return -EIO;
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return map[ec];
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}
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static void fetch_get_meta(struct apk_istream *is, struct apk_file_meta *meta)
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{
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struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
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*meta = (struct apk_file_meta) {
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.atime = fis->urlstat.atime,
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.mtime = fis->urlstat.mtime,
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};
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}
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static ssize_t fetch_read(struct apk_istream *is, void *ptr, size_t size)
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{
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struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
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ssize_t r;
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r = fetchIO_read(fis->fetchIO, ptr, size);
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if (r < 0) return -EIO;
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return r;
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}
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static int fetch_close(struct apk_istream *is)
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{
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int r = is->err;
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struct apk_fetch_istream *fis = container_of(is, struct apk_fetch_istream, is);
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fetchIO_close(fis->fetchIO);
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free(fis);
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return r < 0 ? r : 0;
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}
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static const struct apk_istream_ops fetch_istream_ops = {
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.get_meta = fetch_get_meta,
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.read = fetch_read,
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.close = fetch_close,
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};
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static struct apk_istream *apk_istream_fetch(const char *url, time_t since)
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{
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struct apk_fetch_istream *fis = NULL;
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struct url *u;
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char *flags = "Ci";
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fetchIO *io = NULL;
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int rc = -EIO;
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u = fetchParseURL(url);
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if (!u) {
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rc = -APKE_URL_FORMAT;
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goto err;
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}
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fis = malloc(sizeof *fis + apk_io_bufsize);
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if (!fis) {
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rc = -ENOMEM;
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goto err;
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}
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if (since != APK_ISTREAM_FORCE_REFRESH) {
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u->last_modified = since;
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flags = "i";
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}
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io = fetchXGet(u, &fis->urlstat, flags);
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if (!io) {
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rc = fetch_maperror(fetchLastErrCode);
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goto err;
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}
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*fis = (struct apk_fetch_istream) {
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.is.ops = &fetch_istream_ops,
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.is.buf = (uint8_t*)(fis+1),
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.is.buf_size = apk_io_bufsize,
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.fetchIO = io,
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.urlstat = fis->urlstat,
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};
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fetchFreeURL(u);
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return &fis->is;
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err:
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if (u) fetchFreeURL(u);
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if (io) fetchIO_close(io);
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if (fis) free(fis);
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return ERR_PTR(rc);
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}
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struct apk_istream *apk_istream_from_fd_url_if_modified(int atfd, const char *url, time_t since)
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{
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if (apk_url_local_file(url) != NULL)
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return apk_istream_from_file(atfd, apk_url_local_file(url));
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return apk_istream_fetch(url, since);
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}
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