Base changes to HTTP.c on correct file version
This commit is contained in:
Simon Robertshaw
parent
aeb383742f
commit
0c8fae82c7
541
src/http.c
541
src/http.c
@ -6,7 +6,7 @@
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* the Free Software Foundation; either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
@ -15,8 +15,7 @@
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
|
||||
@ -407,162 +406,162 @@ int http_async_req_status(void *ctx)
|
||||
|
||||
switch (cx->state)
|
||||
{
|
||||
case HTS_STRT:
|
||||
dns = getserv(cx->host);
|
||||
srv = getport(cx->host);
|
||||
if (resolve(dns, srv, &cx->addr))
|
||||
{
|
||||
free(dns);
|
||||
free(srv);
|
||||
cx->state = HTS_DONE;
|
||||
cx->ret = 602;
|
||||
return 1;
|
||||
}
|
||||
free(dns);
|
||||
free(srv);
|
||||
cx->state = HTS_RSLV;
|
||||
return 0;
|
||||
case HTS_RSLV:
|
||||
cx->state = HTS_CONN;
|
||||
cx->last = now;
|
||||
return 0;
|
||||
case HTS_CONN:
|
||||
if (cx->fd == PERROR)
|
||||
{
|
||||
cx->fd = socket(AF_INET, SOCK_STREAM, 0);
|
||||
if (cx->fd == PERROR)
|
||||
goto fail;
|
||||
cx->fdhost = mystrdup(cx->host);
|
||||
case HTS_STRT:
|
||||
dns = getserv(cx->host);
|
||||
srv = getport(cx->host);
|
||||
if (resolve(dns, srv, &cx->addr))
|
||||
{
|
||||
free(dns);
|
||||
free(srv);
|
||||
cx->state = HTS_DONE;
|
||||
cx->ret = 602;
|
||||
return 1;
|
||||
}
|
||||
free(dns);
|
||||
free(srv);
|
||||
cx->state = HTS_RSLV;
|
||||
return 0;
|
||||
case HTS_RSLV:
|
||||
cx->state = HTS_CONN;
|
||||
cx->last = now;
|
||||
return 0;
|
||||
case HTS_CONN:
|
||||
if (cx->fd == PERROR)
|
||||
{
|
||||
cx->fd = socket(AF_INET, SOCK_STREAM, 0);
|
||||
if (cx->fd == PERROR)
|
||||
goto fail;
|
||||
cx->fdhost = mystrdup(cx->host);
|
||||
#ifdef WIN32
|
||||
tmp2 = 1;
|
||||
if (ioctlsocket(cx->fd, FIONBIO, &tmp2) == SOCKET_ERROR)
|
||||
goto fail;
|
||||
tmp2 = 1;
|
||||
if (ioctlsocket(cx->fd, FIONBIO, &tmp2) == SOCKET_ERROR)
|
||||
goto fail;
|
||||
#else
|
||||
tmp = fcntl(cx->fd, F_GETFL);
|
||||
if (tmp < 0)
|
||||
goto fail;
|
||||
if (fcntl(cx->fd, F_SETFL, tmp|O_NONBLOCK) < 0)
|
||||
goto fail;
|
||||
tmp = fcntl(cx->fd, F_GETFL);
|
||||
if (tmp < 0)
|
||||
goto fail;
|
||||
if (fcntl(cx->fd, F_SETFL, tmp|O_NONBLOCK) < 0)
|
||||
goto fail;
|
||||
#endif
|
||||
}
|
||||
if (!connect(cx->fd, (struct sockaddr *)&cx->addr, sizeof(cx->addr)))
|
||||
cx->state = HTS_IDLE;
|
||||
}
|
||||
if (!connect(cx->fd, (struct sockaddr *)&cx->addr, sizeof(cx->addr)))
|
||||
cx->state = HTS_IDLE;
|
||||
#ifdef WIN32
|
||||
else if (PERRNO==WSAEISCONN)
|
||||
cx->state = HTS_IDLE;
|
||||
else if (PERRNO==WSAEISCONN)
|
||||
cx->state = HTS_IDLE;
|
||||
#endif
|
||||
#if defined(MACOSX) || defined(BSD)
|
||||
else if (PERRNO==EISCONN)
|
||||
cx->state = HTS_IDLE;
|
||||
else if (PERRNO==EISCONN)
|
||||
cx->state = HTS_IDLE;
|
||||
#endif
|
||||
else if (PERRNO!=PEINPROGRESS && PERRNO!=PEALREADY
|
||||
else if (PERRNO!=PEINPROGRESS && PERRNO!=PEALREADY
|
||||
#ifdef WIN32
|
||||
&& PERRNO!=PEAGAIN && PERRNO!=WSAEINVAL
|
||||
&& PERRNO!=PEAGAIN && PERRNO!=WSAEINVAL
|
||||
#endif
|
||||
)
|
||||
goto fail;
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_IDLE:
|
||||
if (cx->txdl)
|
||||
{
|
||||
// generate POST
|
||||
cx->tbuf = malloc(strlen(cx->host) + strlen(cx->path) + 127 + cx->txdl + cx->thlen);
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "POST %s HTTP/1.1\r\n", cx->path);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Host: %s\r\n", cx->host);
|
||||
if (!cx->keep)
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Connection: close\r\n");
|
||||
if (cx->thdr)
|
||||
{
|
||||
memcpy(cx->tbuf+cx->tlen, cx->thdr, cx->thlen);
|
||||
cx->tlen += cx->thlen;
|
||||
free(cx->thdr);
|
||||
cx->thdr = NULL;
|
||||
cx->thlen = 0;
|
||||
}
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Content-Length: %d\r\n", cx->txdl);
|
||||
)
|
||||
goto fail;
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_IDLE:
|
||||
if (cx->txdl)
|
||||
{
|
||||
// generate POST
|
||||
cx->tbuf = malloc(strlen(cx->host) + strlen(cx->path) + 126 + cx->txdl + cx->thlen);
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "POST %s HTTP/1.1\r\n", cx->path);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Host: %s\r\n", cx->host);
|
||||
if (!cx->keep)
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Connection: close\r\n");
|
||||
if (cx->thdr)
|
||||
{
|
||||
memcpy(cx->tbuf+cx->tlen, cx->thdr, cx->thlen);
|
||||
cx->tlen += cx->thlen;
|
||||
free(cx->thdr);
|
||||
cx->thdr = NULL;
|
||||
cx->thlen = 0;
|
||||
}
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Content-Length: %d\r\n", cx->txdl);
|
||||
#ifdef BETA
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dB%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dB%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
#else
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dS%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dS%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
#endif
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "\r\n");
|
||||
memcpy(cx->tbuf+cx->tlen, cx->txd, cx->txdl);
|
||||
cx->tlen += cx->txdl;
|
||||
free(cx->txd);
|
||||
cx->txd = NULL;
|
||||
cx->txdl = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
// generate GET
|
||||
cx->tbuf = malloc(strlen(cx->host) + strlen(cx->path) + 95 + cx->thlen);
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "GET %s HTTP/1.1\r\n", cx->path);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Host: %s\r\n", cx->host);
|
||||
if (cx->thdr)
|
||||
{
|
||||
memcpy(cx->tbuf+cx->tlen, cx->thdr, cx->thlen);
|
||||
cx->tlen += cx->thlen;
|
||||
free(cx->thdr);
|
||||
cx->thdr = NULL;
|
||||
cx->thlen = 0;
|
||||
}
|
||||
if (!cx->keep)
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Connection: close\r\n");
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "\r\n");
|
||||
memcpy(cx->tbuf+cx->tlen, cx->txd, cx->txdl);
|
||||
cx->tlen += cx->txdl;
|
||||
free(cx->txd);
|
||||
cx->txd = NULL;
|
||||
cx->txdl = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
// generate GET
|
||||
cx->tbuf = malloc(strlen(cx->host) + strlen(cx->path) +93 + cx->thlen);
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "GET %s HTTP/1.1\r\n", cx->path);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Host: %s\r\n", cx->host);
|
||||
if (cx->thdr)
|
||||
{
|
||||
memcpy(cx->tbuf+cx->tlen, cx->thdr, cx->thlen);
|
||||
cx->tlen += cx->thlen;
|
||||
free(cx->thdr);
|
||||
cx->thdr = NULL;
|
||||
cx->thlen = 0;
|
||||
}
|
||||
if (!cx->keep)
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "Connection: close\r\n");
|
||||
#ifdef BETA
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dB%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dB%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
#else
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dS%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "X-Powder-Version: %s%dS%d\r\n", IDENT_VERSION, SAVE_VERSION, MINOR_VERSION);
|
||||
#endif
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "\r\n");
|
||||
}
|
||||
cx->state = HTS_XMIT;
|
||||
cx->last = now;
|
||||
return 0;
|
||||
case HTS_XMIT:
|
||||
tmp = send(cx->fd, cx->tbuf+cx->tptr, cx->tlen-cx->tptr, 0);
|
||||
if (tmp==PERROR && PERRNO!=PEAGAIN && PERRNO!=PEINTR)
|
||||
goto fail;
|
||||
if (tmp!=PERROR)
|
||||
{
|
||||
cx->tptr += tmp;
|
||||
if (cx->tptr == cx->tlen)
|
||||
{
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
if (cx->tbuf)
|
||||
free(cx->tbuf);
|
||||
cx->state = HTS_RECV;
|
||||
}
|
||||
cx->last = now;
|
||||
}
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_RECV:
|
||||
tmp = recv(cx->fd, buf, CHUNK, 0);
|
||||
if (tmp==PERROR && PERRNO!=PEAGAIN && PERRNO!=PEINTR)
|
||||
goto fail;
|
||||
if (tmp!=PERROR)
|
||||
{
|
||||
for (i=0; i<tmp; i++)
|
||||
{
|
||||
process_byte(cx, buf[i]);
|
||||
if (cx->state == HTS_DONE)
|
||||
return 1;
|
||||
}
|
||||
cx->last = now;
|
||||
}
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_DONE:
|
||||
return 1;
|
||||
cx->tlen += sprintf(cx->tbuf+cx->tlen, "\r\n");
|
||||
}
|
||||
cx->state = HTS_XMIT;
|
||||
cx->last = now;
|
||||
return 0;
|
||||
case HTS_XMIT:
|
||||
tmp = send(cx->fd, cx->tbuf+cx->tptr, cx->tlen-cx->tptr, 0);
|
||||
if (tmp==PERROR && PERRNO!=PEAGAIN && PERRNO!=PEINTR)
|
||||
goto fail;
|
||||
if (tmp!=PERROR)
|
||||
{
|
||||
cx->tptr += tmp;
|
||||
if (cx->tptr == cx->tlen)
|
||||
{
|
||||
cx->tptr = 0;
|
||||
cx->tlen = 0;
|
||||
if (cx->tbuf)
|
||||
free(cx->tbuf);
|
||||
cx->state = HTS_RECV;
|
||||
}
|
||||
cx->last = now;
|
||||
}
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_RECV:
|
||||
tmp = recv(cx->fd, buf, CHUNK, 0);
|
||||
if (tmp==PERROR && PERRNO!=PEAGAIN && PERRNO!=PEINTR)
|
||||
goto fail;
|
||||
if (tmp!=PERROR)
|
||||
{
|
||||
for (i=0; i<tmp; i++)
|
||||
{
|
||||
process_byte(cx, buf[i]);
|
||||
if (cx->state == HTS_DONE)
|
||||
return 1;
|
||||
}
|
||||
cx->last = now;
|
||||
}
|
||||
if (now-cx->last>http_timeout)
|
||||
goto timeout;
|
||||
return 0;
|
||||
case HTS_DONE:
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
|
||||
@ -757,137 +756,137 @@ char *http_ret_text(int ret)
|
||||
{
|
||||
switch (ret)
|
||||
{
|
||||
case 100:
|
||||
return "Continue";
|
||||
case 101:
|
||||
return "Switching Protocols";
|
||||
case 102:
|
||||
return "Processing";
|
||||
case 100:
|
||||
return "Continue";
|
||||
case 101:
|
||||
return "Switching Protocols";
|
||||
case 102:
|
||||
return "Processing";
|
||||
|
||||
case 200:
|
||||
return "OK";
|
||||
case 201:
|
||||
return "Created";
|
||||
case 202:
|
||||
return "Accepted";
|
||||
case 203:
|
||||
return "Non-Authoritative Information";
|
||||
case 204:
|
||||
return "No Content";
|
||||
case 205:
|
||||
return "Reset Content";
|
||||
case 206:
|
||||
return "Partial Content";
|
||||
case 207:
|
||||
return "Multi-Status";
|
||||
case 200:
|
||||
return "OK";
|
||||
case 201:
|
||||
return "Created";
|
||||
case 202:
|
||||
return "Accepted";
|
||||
case 203:
|
||||
return "Non-Authoritative Information";
|
||||
case 204:
|
||||
return "No Content";
|
||||
case 205:
|
||||
return "Reset Content";
|
||||
case 206:
|
||||
return "Partial Content";
|
||||
case 207:
|
||||
return "Multi-Status";
|
||||
|
||||
case 300:
|
||||
return "Multiple Choices";
|
||||
case 301:
|
||||
return "Moved Permanently";
|
||||
case 302:
|
||||
return "Found";
|
||||
case 303:
|
||||
return "See Other";
|
||||
case 304:
|
||||
return "Not Modified";
|
||||
case 305:
|
||||
return "Use Proxy";
|
||||
case 306:
|
||||
return "Switch Proxy";
|
||||
case 307:
|
||||
return "Temporary Redirect";
|
||||
case 300:
|
||||
return "Multiple Choices";
|
||||
case 301:
|
||||
return "Moved Permanently";
|
||||
case 302:
|
||||
return "Found";
|
||||
case 303:
|
||||
return "See Other";
|
||||
case 304:
|
||||
return "Not Modified";
|
||||
case 305:
|
||||
return "Use Proxy";
|
||||
case 306:
|
||||
return "Switch Proxy";
|
||||
case 307:
|
||||
return "Temporary Redirect";
|
||||
|
||||
case 400:
|
||||
return "Bad Request";
|
||||
case 401:
|
||||
return "Unauthorized";
|
||||
case 402:
|
||||
return "Payment Required";
|
||||
case 403:
|
||||
return "Forbidden";
|
||||
case 404:
|
||||
return "Not Found";
|
||||
case 405:
|
||||
return "Method Not Allowed";
|
||||
case 406:
|
||||
return "Not Acceptable";
|
||||
case 407:
|
||||
return "Proxy Authentication Required";
|
||||
case 408:
|
||||
return "Request Timeout";
|
||||
case 409:
|
||||
return "Conflict";
|
||||
case 410:
|
||||
return "Gone";
|
||||
case 411:
|
||||
return "Length Required";
|
||||
case 412:
|
||||
return "Precondition Failed";
|
||||
case 413:
|
||||
return "Request Entity Too Large";
|
||||
case 414:
|
||||
return "Request URI Too Long";
|
||||
case 415:
|
||||
return "Unsupported Media Type";
|
||||
case 416:
|
||||
return "Requested Range Not Satisfiable";
|
||||
case 417:
|
||||
return "Expectation Failed";
|
||||
case 418:
|
||||
return "I'm a teapot";
|
||||
case 422:
|
||||
return "Unprocessable Entity";
|
||||
case 423:
|
||||
return "Locked";
|
||||
case 424:
|
||||
return "Failed Dependency";
|
||||
case 425:
|
||||
return "Unordered Collection";
|
||||
case 426:
|
||||
return "Upgrade Required";
|
||||
case 444:
|
||||
return "No Response";
|
||||
case 450:
|
||||
return "Blocked by Windows Parental Controls";
|
||||
case 499:
|
||||
return "Client Closed Request";
|
||||
case 400:
|
||||
return "Bad Request";
|
||||
case 401:
|
||||
return "Unauthorized";
|
||||
case 402:
|
||||
return "Payment Required";
|
||||
case 403:
|
||||
return "Forbidden";
|
||||
case 404:
|
||||
return "Not Found";
|
||||
case 405:
|
||||
return "Method Not Allowed";
|
||||
case 406:
|
||||
return "Not Acceptable";
|
||||
case 407:
|
||||
return "Proxy Authentication Required";
|
||||
case 408:
|
||||
return "Request Timeout";
|
||||
case 409:
|
||||
return "Conflict";
|
||||
case 410:
|
||||
return "Gone";
|
||||
case 411:
|
||||
return "Length Required";
|
||||
case 412:
|
||||
return "Precondition Failed";
|
||||
case 413:
|
||||
return "Request Entity Too Large";
|
||||
case 414:
|
||||
return "Request URI Too Long";
|
||||
case 415:
|
||||
return "Unsupported Media Type";
|
||||
case 416:
|
||||
return "Requested Range Not Satisfiable";
|
||||
case 417:
|
||||
return "Expectation Failed";
|
||||
case 418:
|
||||
return "I'm a teapot";
|
||||
case 422:
|
||||
return "Unprocessable Entity";
|
||||
case 423:
|
||||
return "Locked";
|
||||
case 424:
|
||||
return "Failed Dependency";
|
||||
case 425:
|
||||
return "Unordered Collection";
|
||||
case 426:
|
||||
return "Upgrade Required";
|
||||
case 444:
|
||||
return "No Response";
|
||||
case 450:
|
||||
return "Blocked by Windows Parental Controls";
|
||||
case 499:
|
||||
return "Client Closed Request";
|
||||
|
||||
case 500:
|
||||
return "Internal Server Error";
|
||||
case 501:
|
||||
return "Not Implemented";
|
||||
case 502:
|
||||
return "Bad Gateway";
|
||||
case 503:
|
||||
return "Service Unavailable";
|
||||
case 504:
|
||||
return "Gateway Timeout";
|
||||
case 505:
|
||||
return "HTTP Version Not Supported";
|
||||
case 506:
|
||||
return "Variant Also Negotiates";
|
||||
case 507:
|
||||
return "Insufficient Storage";
|
||||
case 509:
|
||||
return "Bandwidth Limit Exceeded";
|
||||
case 510:
|
||||
return "Not Extended";
|
||||
case 500:
|
||||
return "Internal Server Error";
|
||||
case 501:
|
||||
return "Not Implemented";
|
||||
case 502:
|
||||
return "Bad Gateway";
|
||||
case 503:
|
||||
return "Service Unavailable";
|
||||
case 504:
|
||||
return "Gateway Timeout";
|
||||
case 505:
|
||||
return "HTTP Version Not Supported";
|
||||
case 506:
|
||||
return "Variant Also Negotiates";
|
||||
case 507:
|
||||
return "Insufficient Storage";
|
||||
case 509:
|
||||
return "Bandwidth Limit Exceeded";
|
||||
case 510:
|
||||
return "Not Extended";
|
||||
|
||||
case 600:
|
||||
return "Internal Client Error";
|
||||
case 601:
|
||||
return "Unsupported Protocol";
|
||||
case 602:
|
||||
return "Server Not Found";
|
||||
case 603:
|
||||
return "Malformed Response";
|
||||
case 604:
|
||||
return "Network Not Available";
|
||||
case 605:
|
||||
return "Request Timed Out";
|
||||
default:
|
||||
return "Unknown Status Code";
|
||||
case 600:
|
||||
return "Internal Client Error";
|
||||
case 601:
|
||||
return "Unsupported Protocol";
|
||||
case 602:
|
||||
return "Server Not Found";
|
||||
case 603:
|
||||
return "Malformed Response";
|
||||
case 604:
|
||||
return "Network Not Available";
|
||||
case 605:
|
||||
return "Request Timed Out";
|
||||
default:
|
||||
return "Unknown Status Code";
|
||||
}
|
||||
}
|
||||
char *http_multipart_post(char *uri, char **names, char **parts, int *plens, char *user, char *pass, char *session_id, int *ret, int *len)
|
||||
@ -914,7 +913,7 @@ char *http_multipart_post(char *uri, char **names, char **parts, int *plens, cha
|
||||
plens[i] = strlen(parts[i]);
|
||||
}
|
||||
|
||||
retry:
|
||||
retry:
|
||||
if (blen >= 31)
|
||||
goto fail;
|
||||
memset(map, 0, 62*sizeof(int));
|
||||
|
||||
Reference in New Issue
Block a user