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/*******************************************************************************
* libproxy - A library for proxy configuration
* Copyright (C) 2006 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#define _BSD_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>
/* Import libproxy API */
#include <proxy.h>
void *
malloc0(size_t s)
{
void *tmp = malloc(s);
if (!tmp) return NULL;
memset(tmp, '\0', s);
return tmp;
}
/**
* Reads a single line of text from the specified file descriptor
* @fd File descriptor to read from
* @buffer The buffer to write to (usually NULL)
* @bufsize The size of the buffer (usually 0)
* @return Newly allocated string containing one line only
*/
static char *
readline(int fd, char *buffer, size_t bufsize)
{
char c = '\0';
/* Verify we have an open socket */
if (fd < 0) return NULL;
/* Read a character. If we don't get a character, return the buffer. */
if (read(fd, &c, 1) != 1) return buffer;
/* If we are at the end of the line, return. */
if (c == '\n') return buffer ? buffer : malloc0(1);
/* We have a character, make sure we have a buffer. */
if (!buffer)
{
assert((buffer = malloc0(1)));
bufsize = 0;
}
/* If our buffer is full, add more to the buffer. */
if (bufsize <= strlen(buffer))
{
char *tmp = NULL;
assert((tmp = malloc(1024 + strlen(buffer) + 1)));
memset(tmp, 0, 1024 + strlen(buffer) + 1);
strcpy(tmp, buffer);
free(buffer);
buffer = tmp;
bufsize = strlen(buffer) + 1024;
}
strncat(buffer, &c, 1);
return readline(fd, buffer, bufsize);
}
/**
* Prints an array of proxies. Proxies are space separated.
* @proxies an array containing the proxies returned by libproxy.
*/
void
print_proxies(char **proxies)
{
for (int j = 0; proxies[j] ; j++)
{
printf(proxies[j]);
if (proxies[j+1])
printf(" ");
else
printf("\n");
free(proxies[j]);
}
free(proxies);
}
int
main(int argc, char **argv)
{
/* Create the proxy factory object */
pxProxyFactory *pf = px_proxy_factory_new();
if (!pf)
{
fprintf(stderr, "An unknown error occurred!\n");
return 1;
}
/* User entered some arguments on startup. skip interactive */
if (argc > 1)
{
for(int i = 1; i < argc ; i++)
{
/*
* Get an array of proxies to use. These should be used
* in the order returned. Only move on to the next proxy
* if the first one fails (etc).
*/
print_proxies(px_proxy_factory_get_proxies(pf, argv[i]));
}
}
/* Interactive mode */
else
{
/* For each URL we read on STDIN, get the proxies to use */
for (char *url = NULL ; (url = readline(STDIN_FILENO, NULL, 0)) ; free(url))
{
/*
* Get an array of proxies to use. These should be used
* in the order returned. Only move on to the next proxy
* if the first one fails (etc).
*/
print_proxies(px_proxy_factory_get_proxies(pf, url));
}
}
/* Destroy the proxy factory object */
px_proxy_factory_free(pf);
return 0;
}
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