1a5faa1061
fetchStat*(). In most cases, either fetchGet*() or fetchXGet*() is a wrapper around the other; in all cases, calling fetchGet*() is identical to calling fetchXGet*() with the second argument set to NULL.
414 lines
9.5 KiB
C
414 lines
9.5 KiB
C
/*-
|
|
* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer
|
|
* in this position and unchanged.
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/errno.h>
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "fetch.h"
|
|
#include "common.h"
|
|
|
|
|
|
int fetchLastErrCode;
|
|
char fetchLastErrString[MAXERRSTRING];
|
|
int fetchTimeout;
|
|
int fetchRestartCalls = 1;
|
|
|
|
|
|
/*** Local data **************************************************************/
|
|
|
|
/*
|
|
* Error messages for parser errors
|
|
*/
|
|
#define URL_MALFORMED 1
|
|
#define URL_BAD_SCHEME 2
|
|
#define URL_BAD_PORT 3
|
|
static struct fetcherr _url_errlist[] = {
|
|
{ URL_MALFORMED, FETCH_URL, "Malformed URL" },
|
|
{ URL_BAD_SCHEME, FETCH_URL, "Invalid URL scheme" },
|
|
{ URL_BAD_PORT, FETCH_URL, "Invalid server port" },
|
|
{ -1, FETCH_UNKNOWN, "Unknown parser error" }
|
|
};
|
|
|
|
|
|
/*** Public API **************************************************************/
|
|
|
|
/*
|
|
* Select the appropriate protocol for the URL scheme, and return a
|
|
* read-only stream connected to the document referenced by the URL.
|
|
* Also fill out the struct url_stat.
|
|
*/
|
|
FILE *
|
|
fetchXGet(struct url *URL, struct url_stat *us, char *flags)
|
|
{
|
|
int direct;
|
|
|
|
direct = (flags && strchr(flags, 'd'));
|
|
if (strcasecmp(URL->scheme, "file") == 0)
|
|
return fetchXGetFile(URL, us, flags);
|
|
else if (strcasecmp(URL->scheme, "http") == 0)
|
|
return fetchXGetHTTP(URL, us, flags);
|
|
else if (strcasecmp(URL->scheme, "ftp") == 0) {
|
|
if (!direct &&
|
|
getenv("FTP_PROXY") == NULL && getenv("HTTP_PROXY") != NULL)
|
|
return fetchXGetHTTP(URL, us, flags);
|
|
return fetchXGetFTP(URL, us, flags);
|
|
} else {
|
|
_url_seterr(URL_BAD_SCHEME);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Select the appropriate protocol for the URL scheme, and return a
|
|
* read-only stream connected to the document referenced by the URL.
|
|
*/
|
|
FILE *
|
|
fetchGet(struct url *URL, char *flags)
|
|
{
|
|
return fetchXGet(URL, NULL, flags);
|
|
}
|
|
|
|
/*
|
|
* Select the appropriate protocol for the URL scheme, and return a
|
|
* write-only stream connected to the document referenced by the URL.
|
|
*/
|
|
FILE *
|
|
fetchPut(struct url *URL, char *flags)
|
|
{
|
|
int direct;
|
|
|
|
direct = (flags && strchr(flags, 'd'));
|
|
if (strcasecmp(URL->scheme, "file") == 0)
|
|
return fetchPutFile(URL, flags);
|
|
else if (strcasecmp(URL->scheme, "http") == 0)
|
|
return fetchPutHTTP(URL, flags);
|
|
else if (strcasecmp(URL->scheme, "ftp") == 0) {
|
|
if (!direct &&
|
|
getenv("FTP_PROXY") == NULL && getenv("HTTP_PROXY") != NULL)
|
|
return fetchPutHTTP(URL, flags);
|
|
return fetchPutFTP(URL, flags);
|
|
} else {
|
|
_url_seterr(URL_BAD_SCHEME);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Select the appropriate protocol for the URL scheme, and return the
|
|
* size of the document referenced by the URL if it exists.
|
|
*/
|
|
int
|
|
fetchStat(struct url *URL, struct url_stat *us, char *flags)
|
|
{
|
|
int direct;
|
|
|
|
direct = (flags && strchr(flags, 'd'));
|
|
if (strcasecmp(URL->scheme, "file") == 0)
|
|
return fetchStatFile(URL, us, flags);
|
|
else if (strcasecmp(URL->scheme, "http") == 0)
|
|
return fetchStatHTTP(URL, us, flags);
|
|
else if (strcasecmp(URL->scheme, "ftp") == 0) {
|
|
if (!direct &&
|
|
getenv("FTP_PROXY") == NULL && getenv("HTTP_PROXY") != NULL)
|
|
return fetchStatHTTP(URL, us, flags);
|
|
return fetchStatFTP(URL, us, flags);
|
|
} else {
|
|
_url_seterr(URL_BAD_SCHEME);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Select the appropriate protocol for the URL scheme, and return a
|
|
* list of files in the directory pointed to by the URL.
|
|
*/
|
|
struct url_ent *
|
|
fetchList(struct url *URL, char *flags)
|
|
{
|
|
int direct;
|
|
|
|
direct = (flags && strchr(flags, 'd'));
|
|
if (strcasecmp(URL->scheme, "file") == 0)
|
|
return fetchListFile(URL, flags);
|
|
else if (strcasecmp(URL->scheme, "http") == 0)
|
|
return fetchListHTTP(URL, flags);
|
|
else if (strcasecmp(URL->scheme, "ftp") == 0) {
|
|
if (!direct &&
|
|
getenv("FTP_PROXY") == NULL && getenv("HTTP_PROXY") != NULL)
|
|
return fetchListHTTP(URL, flags);
|
|
return fetchListFTP(URL, flags);
|
|
} else {
|
|
_url_seterr(URL_BAD_SCHEME);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Attempt to parse the given URL; if successful, call fetchXGet().
|
|
*/
|
|
FILE *
|
|
fetchXGetURL(char *URL, struct url_stat *us, char *flags)
|
|
{
|
|
struct url *u;
|
|
FILE *f;
|
|
|
|
if ((u = fetchParseURL(URL)) == NULL)
|
|
return NULL;
|
|
|
|
f = fetchXGet(u, us, flags);
|
|
|
|
fetchFreeURL(u);
|
|
return f;
|
|
}
|
|
|
|
/*
|
|
* Attempt to parse the given URL; if successful, call fetchGet().
|
|
*/
|
|
FILE *
|
|
fetchGetURL(char *URL, char *flags)
|
|
{
|
|
return fetchXGetURL(URL, NULL, flags);
|
|
}
|
|
|
|
/*
|
|
* Attempt to parse the given URL; if successful, call fetchPut().
|
|
*/
|
|
FILE *
|
|
fetchPutURL(char *URL, char *flags)
|
|
{
|
|
struct url *u;
|
|
FILE *f;
|
|
|
|
if ((u = fetchParseURL(URL)) == NULL)
|
|
return NULL;
|
|
|
|
f = fetchPut(u, flags);
|
|
|
|
fetchFreeURL(u);
|
|
return f;
|
|
}
|
|
|
|
/*
|
|
* Attempt to parse the given URL; if successful, call fetchStat().
|
|
*/
|
|
int
|
|
fetchStatURL(char *URL, struct url_stat *us, char *flags)
|
|
{
|
|
struct url *u;
|
|
int s;
|
|
|
|
if ((u = fetchParseURL(URL)) == NULL)
|
|
return -1;
|
|
|
|
s = fetchStat(u, us, flags);
|
|
|
|
fetchFreeURL(u);
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
* Attempt to parse the given URL; if successful, call fetchList().
|
|
*/
|
|
struct url_ent *
|
|
fetchListURL(char *URL, char *flags)
|
|
{
|
|
struct url *u;
|
|
struct url_ent *ue;
|
|
|
|
if ((u = fetchParseURL(URL)) == NULL)
|
|
return NULL;
|
|
|
|
ue = fetchList(u, flags);
|
|
|
|
fetchFreeURL(u);
|
|
return ue;
|
|
}
|
|
|
|
/*
|
|
* Make a URL
|
|
*/
|
|
struct url *
|
|
fetchMakeURL(char *scheme, char *host, int port, char *doc,
|
|
char *user, char *pwd)
|
|
{
|
|
struct url *u;
|
|
|
|
if (!scheme || (!host && !doc)) {
|
|
_url_seterr(URL_MALFORMED);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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(char *URL)
|
|
{
|
|
char *p, *q;
|
|
struct url *u;
|
|
int i;
|
|
|
|
/* allocate struct url */
|
|
if ((u = calloc(1, sizeof *u)) == NULL) {
|
|
_fetch_syserr();
|
|
return NULL;
|
|
}
|
|
|
|
/* scheme name */
|
|
for (i = 0; *URL && (*URL != ':'); URL++)
|
|
if (i < URL_SCHEMELEN)
|
|
u->scheme[i++] = *URL;
|
|
if (!URL[0] || (URL[1] != '/')) {
|
|
_url_seterr(URL_BAD_SCHEME);
|
|
goto ouch;
|
|
}
|
|
else URL++;
|
|
if (URL[1] != '/') {
|
|
p = URL;
|
|
goto nohost;
|
|
}
|
|
else URL += 2;
|
|
|
|
p = strpbrk(URL, "/@");
|
|
if (p && *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 != '@'); 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) > MAXHOSTNAMELEN)
|
|
i = MAXHOSTNAMELEN;
|
|
strncpy(u->host, ++p, i);
|
|
p = q;
|
|
} else
|
|
#endif
|
|
for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
|
|
if (i < MAXHOSTNAMELEN)
|
|
u->host[i++] = *p;
|
|
|
|
/* port */
|
|
if (*p == ':') {
|
|
for (q = ++p; *q && (*q != '/'); q++)
|
|
if (isdigit(*q))
|
|
u->port = u->port * 10 + (*q - '0');
|
|
else {
|
|
/* invalid port */
|
|
_url_seterr(URL_BAD_PORT);
|
|
goto ouch;
|
|
}
|
|
while (*p && (*p != '/'))
|
|
p++;
|
|
}
|
|
|
|
nohost:
|
|
/* document */
|
|
if (!*p)
|
|
p = "/";
|
|
|
|
if ((u->doc = strdup(p)) == NULL) {
|
|
_fetch_syserr();
|
|
goto ouch;
|
|
}
|
|
|
|
DEBUG(fprintf(stderr,
|
|
"scheme: [\033[1m%s\033[m]\n"
|
|
"user: [\033[1m%s\033[m]\n"
|
|
"password: [\033[1m%s\033[m]\n"
|
|
"host: [\033[1m%s\033[m]\n"
|
|
"port: [\033[1m%d\033[m]\n"
|
|
"document: [\033[1m%s\033[m]\n",
|
|
u->scheme, u->user, u->pwd,
|
|
u->host, u->port, u->doc));
|
|
|
|
return u;
|
|
|
|
ouch:
|
|
free(u);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Free a URL
|
|
*/
|
|
void
|
|
fetchFreeURL(struct url *u)
|
|
{
|
|
free(u->doc);
|
|
free(u);
|
|
}
|