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icecast-server/src/util.c
Philipp Schafft 0b1af34f0e Prevent various redefined definitions in win32-specific code 
From: Erik van Pienbroek <epienbro@fedoraproject.org>
Date: Mon, 22 Dec 2014 18:02:09 +0100
2014-12-24 11:35:56 +00:00

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/* Icecast
*
* This program is distributed under the GNU General Public License, version 2.
* A copy of this license is included with this source.
*
* Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
* Michael Smith <msmith@xiph.org>,
* oddsock <oddsock@xiph.org>,
* Karl Heyes <karl@xiph.org>
* and others (see AUTHORS for details).
* Copyright 2012-2014, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifndef _WIN32
#include <sys/time.h>
#include <sys/socket.h>
#include <unistd.h>
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
#else
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#endif
#include "common/net/sock.h"
#include "common/thread/thread.h"
#include "cfgfile.h"
#include "util.h"
#include "compat.h"
#include "refbuf.h"
#include "connection.h"
#include "client.h"
#include "source.h"
#define CATMODULE "util"
#include "logging.h"
/* Abstract out an interface to use either poll or select depending on which
* is available (poll is preferred) to watch a single fd.
*
* timeout is in milliseconds.
*
* returns > 0 if activity on the fd occurs before the timeout.
* 0 if no activity occurs
* < 0 for error.
*/
int util_timed_wait_for_fd(sock_t fd, int timeout)
{
#ifdef HAVE_POLL
struct pollfd ufds;
ufds.fd = fd;
ufds.events = POLLIN;
ufds.revents = 0;
return poll(&ufds, 1, timeout);
#else
fd_set rfds;
struct timeval tv, *p=NULL;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
if(timeout >= 0) {
tv.tv_sec = timeout/1000;
tv.tv_usec = (timeout % 1000)*1000;
p = &tv;
}
return select(fd+1, &rfds, NULL, NULL, p);
#endif
}
int util_read_header(sock_t sock, char *buff, unsigned long len, int entire)
{
int read_bytes, ret;
unsigned long pos;
char c;
ice_config_t *config;
int header_timeout;
config = config_get_config();
header_timeout = config->header_timeout;
config_release_config();
read_bytes = 1;
pos = 0;
ret = 0;
while ((read_bytes == 1) && (pos < (len - 1))) {
read_bytes = 0;
if (util_timed_wait_for_fd(sock, header_timeout*1000) > 0) {
if ((read_bytes = recv(sock, &c, 1, 0))) {
if (c != '\r') buff[pos++] = c;
if (entire) {
if ((pos > 1) && (buff[pos - 1] == '\n' &&
buff[pos - 2] == '\n')) {
ret = 1;
break;
}
}
else {
if ((pos > 1) && (buff[pos - 1] == '\n')) {
ret = 1;
break;
}
}
}
} else {
break;
}
}
if (ret) buff[pos] = '\0';
return ret;
}
char *util_get_extension(const char *path) {
char *ext = strrchr(path, '.');
if(ext == NULL)
return "";
else
return ext+1;
}
int util_check_valid_extension(const char *uri) {
int ret = 0;
char *p2;
if (uri) {
p2 = strrchr(uri, '.');
if (p2) {
p2++;
if (strncmp(p2, "xsl", strlen("xsl")) == 0) {
/* Build the full path for the request, concatenating the webroot from the config.
** Here would be also a good time to prevent accesses like '../../../../etc/passwd' or somesuch.
*/
ret = XSLT_CONTENT;
}
if (strncmp(p2, "htm", strlen("htm")) == 0) {
/* Build the full path for the request, concatenating the webroot from the config.
** Here would be also a good time to prevent accesses like '../../../../etc/passwd' or somesuch.
*/
ret = HTML_CONTENT;
}
if (strncmp(p2, "html", strlen("html")) == 0) {
/* Build the full path for the request, concatenating the webroot from the config.
** Here would be also a good time to prevent accesses like '../../../../etc/passwd' or somesuch.
*/
ret = HTML_CONTENT;
}
}
}
return ret;
}
static int hex(char c)
{
if(c >= '0' && c <= '9')
return c - '0';
else if(c >= 'A' && c <= 'F')
return c - 'A' + 10;
else if(c >= 'a' && c <= 'f')
return c - 'a' + 10;
else
return -1;
}
static int verify_path(char *path) {
int dir = 0, indotseq = 0;
while(*path) {
if(*path == '/' || *path == '\\') {
if(indotseq)
return 0;
if(dir)
return 0;
dir = 1;
path++;
continue;
}
if(dir || indotseq) {
if(*path == '.')
indotseq = 1;
else
indotseq = 0;
}
dir = 0;
path++;
}
return 1;
}
char *util_get_path_from_uri(char *uri) {
char *path = util_normalise_uri(uri);
char *fullpath;
if(!path)
return NULL;
else {
fullpath = util_get_path_from_normalised_uri(path);
free(path);
return fullpath;
}
}
char *util_get_path_from_normalised_uri(const char *uri) {
char *fullpath;
char *webroot;
ice_config_t *config = config_get_config();
webroot = config->webroot_dir;
fullpath = malloc(strlen(uri) + strlen(webroot) + 1);
if (fullpath)
sprintf (fullpath, "%s%s", webroot, uri);
config_release_config();
return fullpath;
}
static char hexchars[16] = {
'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'
};
static char safechars[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
char *util_url_escape (const char *src)
{
int len = strlen(src);
/* Efficiency not a big concern here, keep the code simple/conservative */
char *dst = calloc(1, len*3 + 1);
unsigned char *source = (unsigned char *)src;
int i,j=0;
for(i=0; i < len; i++) {
if(safechars[source[i]]) {
dst[j++] = source[i];
}
else {
dst[j] = '%';
dst[j+1] = hexchars[ (source[i] >> 4) & 0xf ];
dst[j+2] = hexchars[ source[i] & 0xf ];
j+= 3;
}
}
dst[j] = 0;
return dst;
}
char *util_url_unescape (const char *src)
{
int len = strlen(src);
char *decoded;
int i;
char *dst;
int done = 0;
decoded = calloc(1, len + 1);
dst = decoded;
for(i=0; i < len; i++) {
switch(src[i]) {
case '%':
if(i+2 >= len) {
free(decoded);
return NULL;
}
if(hex(src[i+1]) == -1 || hex(src[i+2]) == -1 ) {
free(decoded);
return NULL;
}
*dst++ = hex(src[i+1]) * 16 + hex(src[i+2]);
i+= 2;
break;
case '#':
done = 1;
break;
case 0:
ICECAST_LOG_ERROR("Fatal internal logic error in util_url_unescape()");
free(decoded);
return NULL;
break;
default:
*dst++ = src[i];
break;
}
if(done)
break;
}
*dst = 0; /* null terminator */
return decoded;
}
/* Get an absolute path (from the webroot dir) from a URI. Return NULL if the
* path contains 'disallowed' sequences like foo/../ (which could be used to
* escape from the webroot) or if it cannot be URI-decoded.
* Caller should free the path.
*/
char *util_normalise_uri(const char *uri) {
char *path;
if(uri[0] != '/')
return NULL;
path = util_url_unescape(uri);
if(path == NULL) {
ICECAST_LOG_WARN("Error decoding URI: %s\n", uri);
return NULL;
}
/* We now have a full URI-decoded path. Check it for allowability */
if(verify_path(path))
return path;
else {
ICECAST_LOG_WARN("Rejecting invalid path \"%s\"", path);
free(path);
return NULL;
}
}
static char base64table[64] = {
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'
};
static signed char base64decode[256] = {
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, 62, -2, -2, -2, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -2, -2, -2, -1, -2, -2,
-2, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -2, -2, -2, -2, -2,
-2, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2
};
char *util_bin_to_hex(unsigned char *data, int len)
{
char *hex = malloc(len*2 + 1);
int i;
for (i = 0; i < len; i++) {
hex[i*2] = hexchars[(data[i]&0xf0) >> 4];
hex[i*2+1] = hexchars[data[i]&0x0f];
}
hex[len*2] = 0;
return hex;
}
/* This isn't efficient, but it doesn't need to be */
char *util_base64_encode(const char *data)
{
int len = strlen(data);
char *out = malloc(len*4/3 + 4);
char *result = out;
int chunk;
while(len > 0) {
chunk = (len >3)?3:len;
*out++ = base64table[(*data & 0xFC)>>2];
*out++ = base64table[((*data & 0x03)<<4) | ((*(data+1) & 0xF0) >> 4)];
switch(chunk) {
case 3:
*out++ = base64table[((*(data+1) & 0x0F)<<2) | ((*(data+2) & 0xC0)>>6)];
*out++ = base64table[(*(data+2)) & 0x3F];
break;
case 2:
*out++ = base64table[((*(data+1) & 0x0F)<<2)];
*out++ = '=';
break;
case 1:
*out++ = '=';
*out++ = '=';
break;
}
data += chunk;
len -= chunk;
}
*out = 0;
return result;
}
char *util_base64_decode(const char *data)
{
const unsigned char *input = (const unsigned char *)data;
int len = strlen (data);
char *out = malloc(len*3/4 + 5);
char *result = out;
signed char vals[4];
while(len > 0) {
if(len < 4)
{
free(result);
return NULL; /* Invalid Base64 data */
}
vals[0] = base64decode[*input++];
vals[1] = base64decode[*input++];
vals[2] = base64decode[*input++];
vals[3] = base64decode[*input++];
if(vals[0] < 0 || vals[1] < 0 || vals[2] < -1 || vals[3] < -1) {
len -= 4;
continue;
}
*out++ = vals[0]<<2 | vals[1]>>4;
/* vals[3] and (if that is) vals[2] can be '=' as padding, which is
looked up in the base64decode table as '-1'. Check for this case,
and output zero-terminators instead of characters if we've got
padding. */
if(vals[2] >= 0)
*out++ = ((vals[1]&0x0F)<<4) | (vals[2]>>2);
else
*out++ = 0;
if(vals[3] >= 0)
*out++ = ((vals[2]&0x03)<<6) | (vals[3]);
else
*out++ = 0;
len -= 4;
}
*out = 0;
return result;
}
util_hostcheck_type util_hostcheck(const char *hostname) {
const char * p;
size_t colon_count;
if (!hostname)
return HOSTCHECK_ERROR;
if (strcmp(hostname, "localhost") == 0 ||
strcmp(hostname, "localhost.localdomain") == 0 ||
strcmp(hostname, "localhost.localnet") == 0)
return HOSTCHECK_IS_LOCALHOST;
for (p = hostname; *p; p++)
if (!( (*p >= '0' && *p <= '9') || *p == '.'))
break;
if (!*p)
return HOSTCHECK_IS_IPV4;
for (p = hostname, colon_count = 0; *p; p++) {
if (*p == ':') {
colon_count++;
continue;
}
if (!((*p >= 'a' && *p <= 'f') || (*p >= '0' && *p <= '9') || *p == ':'))
break;
}
if (!*p && colon_count)
return HOSTCHECK_IS_IPV6;
for (p = hostname; *p; p++)
if (!( (*p >= 'a' && *p <= 'z') || (*p >= '0' && *p <= '9') || *p == '.' || *p == '-' ))
return HOSTCHECK_BADCHAR;
for (p = hostname, colon_count = 0; *p && *p != '.'; p++);
if (!*p)
return HOSTCHECK_NOT_FQDN;
return HOSTCHECK_SANE;
}
int util_str_to_bool(const char *str) {
/* consider NULL and empty strings false */
if (!str || !*str)
return 0;
/* common words for true values */
if (strcasecmp(str, "true") == 0 ||
strcasecmp(str, "yes") == 0 ||
strcasecmp(str, "on") == 0 )
return 1;
/* old style numbers: consider everyting non-zero true */
if (atoi(str))
return 1;
/* we default to no */
return 0;
}
int util_str_to_loglevel(const char *str) {
if (strcasecmp(str, "debug") == 0 || strcasecmp(str, "DBUG") == 0)
return ICECAST_LOGLEVEL_DEBUG;
if (strcasecmp(str, "information") == 0 || strcasecmp(str, "INFO") == 0)
return ICECAST_LOGLEVEL_INFO;
if (strcasecmp(str, "warning") == 0 || strcasecmp(str, "WARN") == 0)
return ICECAST_LOGLEVEL_WARN;
if (strcasecmp(str, "error") == 0 || strcasecmp(str, "EROR") == 0)
return ICECAST_LOGLEVEL_ERROR;
/* gussing it is old-style numerical setting */
return atoi(str);
}
/* TODO, FIXME: handle memory allocation errors better. */
static inline void _build_headers_loop(char **ret, size_t *len, ice_config_http_header_t *header, int status) {
size_t headerlen;
const char *name;
const char *value;
char * r = *ret;
if (!header)
return;
do {
/* filter out header's we don't use. */
if (header->status != 0 && header->status != status) continue;
/* get the name of the header */
name = header->name;
/* handle type of the header */
value = NULL;
switch (header->type) {
case HTTP_HEADER_TYPE_STATIC:
value = header->value;
break;
}
/* check data */
if (!name || !value)
continue;
/* append the header to the buffer */
headerlen = strlen(name) + strlen(value) + 4;
*len += headerlen;
r = realloc(r, *len);
strcat(r, name);
strcat(r, ": ");
strcat(r, value);
strcat(r, "\r\n");
} while ((header = header->next));
*ret = r;
}
static inline char * _build_headers(int status, ice_config_t *config, source_t *source) {
mount_proxy *mountproxy = NULL;
char *ret = NULL;
size_t len = 1;
if (source)
mountproxy = config_find_mount(config, source->mount, MOUNT_TYPE_NORMAL);
ret = calloc(1, 1);
*ret = 0;
_build_headers_loop(&ret, &len, config->http_headers, status);
if (mountproxy && mountproxy->http_headers)
_build_headers_loop(&ret, &len, mountproxy->http_headers, status);
return ret;
}
ssize_t util_http_build_header(char * out, size_t len, ssize_t offset,
int cache,
int status, const char * statusmsg,
const char * contenttype, const char * charset,
const char * datablock,
struct source_tag * source) {
const char * http_version = "1.0";
ice_config_t *config;
time_t now;
struct tm result;
struct tm *gmtime_result;
char currenttime_buffer[80];
char status_buffer[80];
char contenttype_buffer[80];
ssize_t ret;
char * extra_headers;
if (!out)
return -1;
if (offset == -1)
offset = strlen (out);
out += offset;
len -= offset;
if (status == -1)
{
status_buffer[0] = '\0';
}
else
{
if (!statusmsg)
{
switch (status)
{
case 200: statusmsg = "OK"; break;
case 206: statusmsg = "Partial Content"; http_version = "1.1"; break;
case 400: statusmsg = "Bad Request"; break;
case 401: statusmsg = "Authentication Required"; break;
case 403: statusmsg = "Forbidden"; break;
case 404: statusmsg = "File Not Found"; break;
case 416: statusmsg = "Request Range Not Satisfiable"; break;
default: statusmsg = "(unknown status code)"; break;
}
}
snprintf (status_buffer, sizeof (status_buffer), "HTTP/%s %d %s\r\n", http_version, status, statusmsg);
}
if (contenttype)
{
if (charset)
snprintf (contenttype_buffer, sizeof (contenttype_buffer), "Content-Type: %s; charset=%s\r\n",
contenttype, charset);
else
snprintf (contenttype_buffer, sizeof (contenttype_buffer), "Content-Type: %s\r\n",
contenttype);
}
else
{
contenttype_buffer[0] = '\0';
}
time(&now);
#ifndef _WIN32
gmtime_result = gmtime_r(&now, &result);
#else
/* gmtime() on W32 breaks POSIX and IS thread-safe (uses TLS) */
gmtime_result = gmtime (&now);
if (gmtime_result)
memcpy (&result, gmtime_result, sizeof (result));
#endif
if (gmtime_result)
strftime(currenttime_buffer, sizeof(currenttime_buffer), "Date: %a, %d %b %Y %X GMT\r\n", gmtime_result);
else
currenttime_buffer[0] = '\0';
config = config_get_config();
extra_headers = _build_headers(status, config, source);
ret = snprintf (out, len, "%sServer: %s\r\n%s%s%s%s%s%s%s",
status_buffer,
config->server_id,
currenttime_buffer,
contenttype_buffer,
(status == 401 ? "WWW-Authenticate: Basic realm=\"Icecast2 Server\"\r\n" : ""),
(cache ? "" : "Cache-Control: no-cache\r\n"
"Expires: Mon, 26 Jul 1997 05:00:00 GMT\r\n"
"Pragma: no-cache\r\n"),
extra_headers,
(datablock ? "\r\n" : ""),
(datablock ? datablock : ""));
free(extra_headers);
config_release_config();
return ret;
}
util_dict *util_dict_new(void)
{
return (util_dict *)calloc(1, sizeof(util_dict));
}
void util_dict_free(util_dict *dict)
{
util_dict *next;
while (dict) {
next = dict->next;
if (dict->key)
free (dict->key);
if (dict->val)
free (dict->val);
free (dict);
dict = next;
}
}
const char *util_dict_get(util_dict *dict, const char *key)
{
while (dict) {
if (!strcmp(key, dict->key))
return dict->val;
dict = dict->next;
}
return NULL;
}
int util_dict_set(util_dict *dict, const char *key, const char *val)
{
util_dict *prev;
if (!dict || !key) {
ICECAST_LOG_ERROR("NULL values passed to util_dict_set()");
return 0;
}
prev = NULL;
while (dict) {
if (!dict->key || !strcmp(dict->key, key))
break;
prev = dict;
dict = dict->next;
}
if (!dict) {
dict = util_dict_new();
if (!dict) {
ICECAST_LOG_ERROR("unable to allocate new dictionary");
return 0;
}
if (prev)
prev->next = dict;
}
if (dict->key)
free (dict->val);
else if (!(dict->key = strdup(key))) {
if (prev)
prev->next = NULL;
util_dict_free (dict);
ICECAST_LOG_ERROR("unable to allocate new dictionary key");
return 0;
}
dict->val = strdup(val);
if (!dict->val) {
ICECAST_LOG_ERROR("unable to allocate new dictionary value");
return 0;
}
return 1;
}
/* given a dictionary, URL-encode each val and
stringify it in order as key=val&key=val... if val
is set, or just key&key if val is NULL.
TODO: Memory management needs overhaul. */
char *util_dict_urlencode(util_dict *dict, char delim)
{
char *res, *tmp;
char *enc;
int start = 1;
for (res = NULL; dict; dict = dict->next) {
/* encode key */
if (!dict->key)
continue;
if (start) {
if (!(res = malloc(strlen(dict->key) + 1))) {
return NULL;
}
sprintf(res, "%s", dict->key);
start = 0;
} else {
if (!(tmp = realloc(res, strlen(res) + strlen(dict->key) + 2))) {
free(res);
return NULL;
} else
res = tmp;
sprintf(res + strlen(res), "%c%s", delim, dict->key);
}
/* encode value */
if (!dict->val)
continue;
if (!(enc = util_url_escape(dict->val))) {
free(res);
return NULL;
}
if (!(tmp = realloc(res, strlen(res) + strlen(enc) + 2))) {
free(enc);
free(res);
return NULL;
} else
res = tmp;
sprintf(res + strlen(res), "=%s", enc);
free(enc);
}
return res;
}
#ifndef HAVE_LOCALTIME_R
struct tm *localtime_r (const time_t *timep, struct tm *result)
{
static mutex_t localtime_lock;
static int initialised = 0;
struct tm *tm;
if (initialised == 0)
{
thread_mutex_create (&localtime_lock);
initialised = 1;
}
thread_mutex_lock (&localtime_lock);
tm = localtime (timep);
memcpy (result, tm, sizeof (*result));
thread_mutex_unlock (&localtime_lock);
return result;
}
#endif
/* helper function for converting a passed string in one character set to another
* we use libxml2 for this
*/
char *util_conv_string (const char *string, const char *in_charset, const char *out_charset)
{
xmlCharEncodingHandlerPtr in, out;
char *ret = NULL;
if (string == NULL || in_charset == NULL || out_charset == NULL)
return NULL;
in = xmlFindCharEncodingHandler (in_charset);
out = xmlFindCharEncodingHandler (out_charset);
if (in && out)
{
xmlBufferPtr orig = xmlBufferCreate ();
xmlBufferPtr utf8 = xmlBufferCreate ();
xmlBufferPtr conv = xmlBufferCreate ();
ICECAST_LOG_INFO("converting metadata from %s to %s", in_charset, out_charset);
xmlBufferCCat (orig, string);
if (xmlCharEncInFunc (in, utf8, orig) > 0)
{
xmlCharEncOutFunc (out, conv, NULL);
if (xmlCharEncOutFunc (out, conv, utf8) >= 0)
ret = strdup ((const char *)xmlBufferContent (conv));
}
xmlBufferFree (orig);
xmlBufferFree (utf8);
xmlBufferFree (conv);
}
xmlCharEncCloseFunc (in);
xmlCharEncCloseFunc (out);
return ret;
}
int get_line(FILE *file, char *buf, size_t siz)
{
if(fgets(buf, (int)siz, file)) {
size_t len = strlen(buf);
if(len > 0 && buf[len-1] == '\n') {
buf[--len] = 0;
if(len > 0 && buf[len-1] == '\r')
buf[--len] = 0;
}
return 1;
}
return 0;
}
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