Implemented support for working with remote repositories.
libfetch from NetBSD's pkgsrc has been imported into lib/fetch, but the objects are embedded into libxbps. Only a public function to fetch files has been implemented: xbps_fetch_file(). The library now is built with -fvisibility=hidden by default, and exported symbols are the ones that use the SYMEXPORT macro. The code works well enough, but will need many more cleanups. --HG-- extra : convert_revision : xtraeme%40gmail.com-20091027004600-0lq9aao67lisbzxv
This commit is contained in:
Juan RP
627
lib/fetch/fetch.c
Normal file
627
lib/fetch/fetch.c
Normal file
@@ -0,0 +1,627 @@
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/* $NetBSD: fetch.c,v 1.19 2009/08/11 20:48:06 joerg Exp $ */
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/*-
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* Copyright (c) 1998-2004 Dag-Erling Coïdan Smørav
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* Copyright (c) 2008 Joerg Sonnenberger <joerg@NetBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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||||
* are met:
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* 1. Redistributions of source code must retain the above copyright
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||||
* notice, this list of conditions and the following disclaimer
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||||
* in this position and unchanged.
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||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
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||||
* 3. The name of the author may not be used to endorse or promote products
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||||
* derived from this software without specific prior written permission
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||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD: fetch.c,v 1.41 2007/12/19 00:26:36 des Exp $
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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||||
#endif
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#ifndef NETBSD
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#include <nbcompat.h>
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#endif
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|
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fetch.h"
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#include "common.h"
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auth_t fetchAuthMethod;
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int fetchLastErrCode;
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char fetchLastErrString[MAXERRSTRING];
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int fetchTimeout;
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volatile int fetchRestartCalls = 1;
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int fetchDebug;
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/*** Local data **************************************************************/
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/*
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* Error messages for parser errors
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*/
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#define URL_MALFORMED 1
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#define URL_BAD_SCHEME 2
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#define URL_BAD_PORT 3
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static struct fetcherr url_errlist[] = {
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{ URL_MALFORMED, FETCH_URL, "Malformed URL" },
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{ URL_BAD_SCHEME, FETCH_URL, "Invalid URL scheme" },
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{ URL_BAD_PORT, FETCH_URL, "Invalid server port" },
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{ -1, FETCH_UNKNOWN, "Unknown parser error" }
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};
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/*** Public API **************************************************************/
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/*
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* Select the appropriate protocol for the URL scheme, and return a
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* read-only stream connected to the document referenced by the URL.
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* Also fill out the struct url_stat.
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*/
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fetchIO *
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fetchXGet(struct url *URL, struct url_stat *us, const char *flags)
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{
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if (us != NULL) {
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us->size = -1;
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us->atime = us->mtime = 0;
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}
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchXGetFile(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchXGetFTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchXGetHTTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchXGetHTTP(URL, us, flags));
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url_seterr(URL_BAD_SCHEME);
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return (NULL);
|
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}
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|
||||
/*
|
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* Select the appropriate protocol for the URL scheme, and return a
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* read-only stream connected to the document referenced by the URL.
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*/
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||||
fetchIO *
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fetchGet(struct url *URL, const char *flags)
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{
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return (fetchXGet(URL, NULL, flags));
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}
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|
||||
/*
|
||||
* Select the appropriate protocol for the URL scheme, and return a
|
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* write-only stream connected to the document referenced by the URL.
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*/
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fetchIO *
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fetchPut(struct url *URL, const char *flags)
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{
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchPutFile(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchPutFTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchPutHTTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchPutHTTP(URL, flags));
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url_seterr(URL_BAD_SCHEME);
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return (NULL);
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}
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||||
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/*
|
||||
* Select the appropriate protocol for the URL scheme, and return the
|
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* size of the document referenced by the URL if it exists.
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*/
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int
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||||
fetchStat(struct url *URL, struct url_stat *us, const char *flags)
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{
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if (us != NULL) {
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us->size = -1;
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us->atime = us->mtime = 0;
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}
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||||
if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchStatFile(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchStatFTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchStatHTTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchStatHTTP(URL, us, flags));
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url_seterr(URL_BAD_SCHEME);
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return (-1);
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||||
}
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||||
|
||||
/*
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||||
* Select the appropriate protocol for the URL scheme, and return a
|
||||
* list of files in the directory pointed to by the URL.
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*/
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||||
int
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fetchList(struct url_list *ue, struct url *URL, const char *pattern,
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const char *flags)
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{
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchListFile(ue, URL, pattern, flags));
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||||
else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchListFTP(ue, URL, pattern, flags));
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||||
else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchListHTTP(ue, URL, pattern, flags));
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||||
else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchListHTTP(ue, URL, pattern, flags));
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||||
url_seterr(URL_BAD_SCHEME);
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||||
return -1;
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||||
}
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||||
/*
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||||
* Attempt to parse the given URL; if successful, call fetchXGet().
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||||
*/
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||||
fetchIO *
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fetchXGetURL(const char *URL, struct url_stat *us, const char *flags)
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||||
{
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||||
struct url *u;
|
||||
fetchIO *f;
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||||
|
||||
if ((u = fetchParseURL(URL)) == NULL)
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||||
return (NULL);
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||||
|
||||
f = fetchXGet(u, us, flags);
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||||
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||||
fetchFreeURL(u);
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||||
return (f);
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||||
}
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||||
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||||
/*
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* Attempt to parse the given URL; if successful, call fetchGet().
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||||
*/
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||||
fetchIO *
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||||
fetchGetURL(const char *URL, const char *flags)
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{
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return (fetchXGetURL(URL, NULL, flags));
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||||
}
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||||
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/*
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||||
* Attempt to parse the given URL; if successful, call fetchPut().
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||||
*/
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fetchIO *
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fetchPutURL(const char *URL, const char *flags)
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{
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struct url *u;
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||||
fetchIO *f;
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||||
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if ((u = fetchParseURL(URL)) == NULL)
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return (NULL);
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||||
f = fetchPut(u, flags);
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fetchFreeURL(u);
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return (f);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchStat().
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*/
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int
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fetchStatURL(const char *URL, struct url_stat *us, const char *flags)
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{
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struct url *u;
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int s;
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if ((u = fetchParseURL(URL)) == NULL)
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return (-1);
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s = fetchStat(u, us, flags);
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fetchFreeURL(u);
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return (s);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchList().
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*/
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int
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fetchListURL(struct url_list *ue, const char *URL, const char *pattern,
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const char *flags)
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{
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struct url *u;
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int rv;
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||||
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if ((u = fetchParseURL(URL)) == NULL)
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return -1;
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rv = fetchList(ue, u, pattern, flags);
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||||
fetchFreeURL(u);
|
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return rv;
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||||
}
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||||
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/*
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* Make a URL
|
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*/
|
||||
struct url *
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||||
fetchMakeURL(const char *scheme, const char *host, int port, const char *doc,
|
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const char *user, const char *pwd)
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{
|
||||
struct url *u;
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||||
|
||||
if (!scheme || (!host && !doc)) {
|
||||
url_seterr(URL_MALFORMED);
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return (NULL);
|
||||
}
|
||||
|
||||
if (port < 0 || port > 65535) {
|
||||
url_seterr(URL_BAD_PORT);
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/* allocate struct url */
|
||||
if ((u = calloc(1, sizeof(*u))) == NULL) {
|
||||
fetch_syserr();
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
if ((u->doc = strdup(doc ? doc : "/")) == NULL) {
|
||||
fetch_syserr();
|
||||
free(u);
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
#define seturl(x) snprintf(u->x, sizeof(u->x), "%s", x)
|
||||
seturl(scheme);
|
||||
seturl(host);
|
||||
seturl(user);
|
||||
seturl(pwd);
|
||||
#undef seturl
|
||||
u->port = port;
|
||||
|
||||
return (u);
|
||||
}
|
||||
|
||||
int
|
||||
fetch_urlpath_safe(char x)
|
||||
{
|
||||
if ((x >= '0' && x <= '9') || (x >= 'A' && x <= 'Z') ||
|
||||
(x >= 'a' && x <= 'z'))
|
||||
return 1;
|
||||
|
||||
switch (x) {
|
||||
case '$':
|
||||
case '-':
|
||||
case '_':
|
||||
case '.':
|
||||
case '+':
|
||||
case '!':
|
||||
case '*':
|
||||
case '\'':
|
||||
case '(':
|
||||
case ')':
|
||||
case ',':
|
||||
/* The following are allowed in segment and path components: */
|
||||
case '?':
|
||||
case ':':
|
||||
case '@':
|
||||
case '&':
|
||||
case '=':
|
||||
case '/':
|
||||
case ';':
|
||||
/* If something is already quoted... */
|
||||
case '%':
|
||||
return 1;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy an existing URL.
|
||||
*/
|
||||
struct url *
|
||||
fetchCopyURL(const struct url *src)
|
||||
{
|
||||
struct url *dst;
|
||||
char *doc;
|
||||
|
||||
/* allocate struct url */
|
||||
if ((dst = malloc(sizeof(*dst))) == NULL) {
|
||||
fetch_syserr();
|
||||
return (NULL);
|
||||
}
|
||||
if ((doc = strdup(src->doc)) == NULL) {
|
||||
fetch_syserr();
|
||||
free(dst);
|
||||
return (NULL);
|
||||
}
|
||||
*dst = *src;
|
||||
dst->doc = doc;
|
||||
|
||||
return dst;
|
||||
}
|
||||
|
||||
/*
|
||||
* Split an URL into components. URL syntax is:
|
||||
* [method:/][/[user[:pwd]@]host[:port]/][document]
|
||||
* This almost, but not quite, RFC1738 URL syntax.
|
||||
*/
|
||||
struct url *
|
||||
fetchParseURL(const char *URL)
|
||||
{
|
||||
const char *p, *q;
|
||||
struct url *u;
|
||||
size_t i, count;
|
||||
int pre_quoted;
|
||||
|
||||
/* allocate struct url */
|
||||
if ((u = calloc(1, sizeof(*u))) == NULL) {
|
||||
fetch_syserr();
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
if (*URL == '/') {
|
||||
pre_quoted = 0;
|
||||
strcpy(u->scheme, SCHEME_FILE);
|
||||
p = URL;
|
||||
goto quote_doc;
|
||||
}
|
||||
if (strncmp(URL, "file:", 5) == 0) {
|
||||
pre_quoted = 1;
|
||||
strcpy(u->scheme, SCHEME_FILE);
|
||||
URL += 5;
|
||||
if (URL[0] != '/' || URL[1] != '/' || URL[2] != '/') {
|
||||
url_seterr(URL_MALFORMED);
|
||||
goto ouch;
|
||||
}
|
||||
p = URL + 2;
|
||||
goto quote_doc;
|
||||
}
|
||||
if (strncmp(URL, "http:", 5) == 0 ||
|
||||
strncmp(URL, "https:", 6) == 0) {
|
||||
pre_quoted = 1;
|
||||
if (URL[4] == ':') {
|
||||
strcpy(u->scheme, SCHEME_HTTP);
|
||||
URL += 5;
|
||||
} else {
|
||||
strcpy(u->scheme, SCHEME_HTTPS);
|
||||
URL += 6;
|
||||
}
|
||||
|
||||
if (URL[0] != '/' || URL[1] != '/') {
|
||||
url_seterr(URL_MALFORMED);
|
||||
goto ouch;
|
||||
}
|
||||
URL += 2;
|
||||
p = URL;
|
||||
goto find_user;
|
||||
}
|
||||
if (strncmp(URL, "ftp:", 4) == 0) {
|
||||
pre_quoted = 1;
|
||||
strcpy(u->scheme, SCHEME_FTP);
|
||||
URL += 4;
|
||||
if (URL[0] != '/' || URL[1] != '/') {
|
||||
url_seterr(URL_MALFORMED);
|
||||
goto ouch;
|
||||
}
|
||||
URL += 2;
|
||||
p = URL;
|
||||
goto find_user;
|
||||
}
|
||||
|
||||
url_seterr(URL_BAD_SCHEME);
|
||||
goto ouch;
|
||||
|
||||
find_user:
|
||||
p = strpbrk(URL, "/@");
|
||||
if (p != NULL && *p == '@') {
|
||||
/* username */
|
||||
for (q = URL, i = 0; (*q != ':') && (*q != '@'); q++) {
|
||||
if (i < URL_USERLEN)
|
||||
u->user[i++] = *q;
|
||||
}
|
||||
|
||||
/* password */
|
||||
if (*q == ':') {
|
||||
for (q++, i = 0; (*q != '@'); q++)
|
||||
if (i < URL_PWDLEN)
|
||||
u->pwd[i++] = *q;
|
||||
}
|
||||
|
||||
p++;
|
||||
} else {
|
||||
p = URL;
|
||||
}
|
||||
|
||||
/* hostname */
|
||||
#ifdef INET6
|
||||
if (*p == '[' && (q = strchr(p + 1, ']')) != NULL &&
|
||||
(*++q == '\0' || *q == '/' || *q == ':')) {
|
||||
if ((i = q - p - 2) > URL_HOSTLEN)
|
||||
i = URL_HOSTLEN;
|
||||
strncpy(u->host, ++p, i);
|
||||
p = q;
|
||||
} else
|
||||
#endif
|
||||
for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
|
||||
if (i < URL_HOSTLEN)
|
||||
u->host[i++] = *p;
|
||||
|
||||
/* port */
|
||||
if (*p == ':') {
|
||||
for (q = ++p; *q && (*q != '/'); q++)
|
||||
if (isdigit((unsigned char)*q))
|
||||
u->port = u->port * 10 + (*q - '0');
|
||||
else {
|
||||
/* invalid port */
|
||||
url_seterr(URL_BAD_PORT);
|
||||
goto ouch;
|
||||
}
|
||||
p = q;
|
||||
}
|
||||
|
||||
/* document */
|
||||
if (!*p)
|
||||
p = "/";
|
||||
|
||||
quote_doc:
|
||||
count = 1;
|
||||
for (i = 0; p[i] != '\0'; ++i) {
|
||||
if ((!pre_quoted && p[i] == '%') ||
|
||||
!fetch_urlpath_safe(p[i]))
|
||||
count += 3;
|
||||
else
|
||||
++count;
|
||||
}
|
||||
|
||||
if ((u->doc = malloc(count)) == NULL) {
|
||||
fetch_syserr();
|
||||
goto ouch;
|
||||
}
|
||||
for (i = 0; *p != '\0'; ++p) {
|
||||
if ((!pre_quoted && *p == '%') ||
|
||||
!fetch_urlpath_safe(*p)) {
|
||||
u->doc[i++] = '%';
|
||||
if ((unsigned char)*p < 160)
|
||||
u->doc[i++] = '0' + ((unsigned char)*p) / 16;
|
||||
else
|
||||
u->doc[i++] = 'a' - 10 + ((unsigned char)*p) / 16;
|
||||
if ((unsigned char)*p % 16 < 10)
|
||||
u->doc[i++] = '0' + ((unsigned char)*p) % 16;
|
||||
else
|
||||
u->doc[i++] = 'a' - 10 + ((unsigned char)*p) % 16;
|
||||
} else
|
||||
u->doc[i++] = *p;
|
||||
}
|
||||
u->doc[i] = '\0';
|
||||
|
||||
return (u);
|
||||
|
||||
ouch:
|
||||
free(u);
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Free a URL
|
||||
*/
|
||||
void
|
||||
fetchFreeURL(struct url *u)
|
||||
{
|
||||
free(u->doc);
|
||||
free(u);
|
||||
}
|
||||
|
||||
static char
|
||||
xdigit2digit(char digit)
|
||||
{
|
||||
digit = tolower((unsigned char)digit);
|
||||
if (digit >= 'a' && digit <= 'f')
|
||||
digit = digit - 'a' + 10;
|
||||
else
|
||||
digit = digit - '0';
|
||||
|
||||
return digit;
|
||||
}
|
||||
|
||||
/*
|
||||
* Unquote whole URL.
|
||||
* Skips optional parts like query or fragment identifier.
|
||||
*/
|
||||
char *
|
||||
fetchUnquotePath(struct url *url)
|
||||
{
|
||||
char *unquoted;
|
||||
const char *iter;
|
||||
size_t i;
|
||||
|
||||
if ((unquoted = malloc(strlen(url->doc) + 1)) == NULL)
|
||||
return NULL;
|
||||
|
||||
for (i = 0, iter = url->doc; *iter != '\0'; ++iter) {
|
||||
if (*iter == '#' || *iter == '?')
|
||||
break;
|
||||
if (iter[0] != '%' ||
|
||||
!isxdigit((unsigned char)iter[1]) ||
|
||||
!isxdigit((unsigned char)iter[2])) {
|
||||
unquoted[i++] = *iter;
|
||||
continue;
|
||||
}
|
||||
unquoted[i++] = xdigit2digit(iter[1]) * 16 +
|
||||
xdigit2digit(iter[2]);
|
||||
iter += 2;
|
||||
}
|
||||
unquoted[i] = '\0';
|
||||
return unquoted;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Extract the file name component of a URL.
|
||||
*/
|
||||
char *
|
||||
fetchUnquoteFilename(struct url *url)
|
||||
{
|
||||
char *unquoted, *filename;
|
||||
const char *last_slash;
|
||||
|
||||
if ((unquoted = fetchUnquotePath(url)) == NULL)
|
||||
return NULL;
|
||||
|
||||
if ((last_slash = strrchr(unquoted, '/')) == NULL)
|
||||
return unquoted;
|
||||
filename = strdup(last_slash + 1);
|
||||
free(unquoted);
|
||||
return filename;
|
||||
}
|
||||
|
||||
char *
|
||||
fetchStringifyURL(const struct url *url)
|
||||
{
|
||||
size_t total;
|
||||
char *doc;
|
||||
|
||||
/* scheme :// user : pwd @ host :port doc */
|
||||
total = strlen(url->scheme) + 3 + strlen(url->user) + 1 +
|
||||
strlen(url->pwd) + 1 + strlen(url->host) + 6 + strlen(url->doc) + 1;
|
||||
if ((doc = malloc(total)) == NULL)
|
||||
return NULL;
|
||||
if (url->port != 0)
|
||||
snprintf(doc, total, "%s%s%s%s%s%s%s:%d%s",
|
||||
url->scheme,
|
||||
url->scheme[0] != '\0' ? "://" : "",
|
||||
url->user,
|
||||
url->pwd[0] != '\0' ? ":" : "",
|
||||
url->pwd,
|
||||
url->user[0] != '\0' || url->pwd[0] != '\0' ? "@" : "",
|
||||
url->host,
|
||||
(int)url->port,
|
||||
url->doc);
|
||||
else {
|
||||
snprintf(doc, total, "%s%s%s%s%s%s%s%s",
|
||||
url->scheme,
|
||||
url->scheme[0] != '\0' ? "://" : "",
|
||||
url->user,
|
||||
url->pwd[0] != '\0' ? ":" : "",
|
||||
url->pwd,
|
||||
url->user[0] != '\0' || url->pwd[0] != '\0' ? "@" : "",
|
||||
url->host,
|
||||
url->doc);
|
||||
}
|
||||
return doc;
|
||||
}
|
||||
Reference in New Issue
Block a user