168 lines
5.2 KiB
C
Executable File
168 lines
5.2 KiB
C
Executable File
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#ifndef CURL_DISABLE_GOPHER
|
|
|
|
#include "urldata.h"
|
|
#include <curl/curl.h>
|
|
#include "transfer.h"
|
|
#include "sendf.h"
|
|
|
|
#include "progress.h"
|
|
#include "strequal.h"
|
|
#include "gopher.h"
|
|
#include "rawstr.h"
|
|
#include "select.h"
|
|
#include "url.h"
|
|
#include "warnless.h"
|
|
#include "curl_memory.h"
|
|
/* The last #include file should be: */
|
|
#include "memdebug.h"
|
|
|
|
/*
|
|
* Forward declarations.
|
|
*/
|
|
|
|
static CURLcode gopher_do(struct connectdata *conn, bool *done);
|
|
|
|
/*
|
|
* Gopher protocol handler.
|
|
* This is also a nice simple template to build off for simple
|
|
* connect-command-download protocols.
|
|
*/
|
|
|
|
const struct Curl_handler Curl_handler_gopher = {
|
|
"GOPHER", /* scheme */
|
|
ZERO_NULL, /* setup_connection */
|
|
gopher_do, /* do_it */
|
|
ZERO_NULL, /* done */
|
|
ZERO_NULL, /* do_more */
|
|
ZERO_NULL, /* connect_it */
|
|
ZERO_NULL, /* connecting */
|
|
ZERO_NULL, /* doing */
|
|
ZERO_NULL, /* proto_getsock */
|
|
ZERO_NULL, /* doing_getsock */
|
|
ZERO_NULL, /* domore_getsock */
|
|
ZERO_NULL, /* perform_getsock */
|
|
ZERO_NULL, /* disconnect */
|
|
ZERO_NULL, /* readwrite */
|
|
PORT_GOPHER, /* defport */
|
|
CURLPROTO_GOPHER, /* protocol */
|
|
PROTOPT_NONE /* flags */
|
|
};
|
|
|
|
static CURLcode gopher_do(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode result=CURLE_OK;
|
|
struct SessionHandle *data=conn->data;
|
|
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
|
|
|
curl_off_t *bytecount = &data->req.bytecount;
|
|
char *path = data->state.path;
|
|
char *sel;
|
|
char *sel_org = NULL;
|
|
ssize_t amount, k;
|
|
int len;
|
|
|
|
*done = TRUE; /* unconditionally */
|
|
|
|
/* Create selector. Degenerate cases: / and /1 => convert to "" */
|
|
if(strlen(path) <= 2) {
|
|
sel = (char *)"";
|
|
len = (int)strlen(sel);
|
|
}
|
|
else {
|
|
char *newp;
|
|
size_t j, i;
|
|
|
|
/* Otherwise, drop / and the first character (i.e., item type) ... */
|
|
newp = path;
|
|
newp+=2;
|
|
|
|
/* ... then turn ? into TAB for search servers, Veronica, etc. ... */
|
|
j = strlen(newp);
|
|
for(i=0; i<j; i++)
|
|
if(newp[i] == '?')
|
|
newp[i] = '\x09';
|
|
|
|
/* ... and finally unescape */
|
|
sel = curl_easy_unescape(data, newp, 0, &len);
|
|
if(!sel)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
sel_org = sel;
|
|
}
|
|
|
|
/* We use Curl_write instead of Curl_sendf to make sure the entire buffer is
|
|
sent, which could be sizeable with long selectors. */
|
|
k = curlx_uztosz(len);
|
|
|
|
for(;;) {
|
|
result = Curl_write(conn, sockfd, sel, k, &amount);
|
|
if(!result) { /* Which may not have written it all! */
|
|
result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount);
|
|
if(result) {
|
|
free(sel_org);
|
|
return result;
|
|
}
|
|
k -= amount;
|
|
sel += amount;
|
|
if(k < 1)
|
|
break; /* but it did write it all */
|
|
}
|
|
else {
|
|
failf(data, "Failed sending Gopher request");
|
|
free(sel_org);
|
|
return result;
|
|
}
|
|
/* Don't busyloop. The entire loop thing is a work-around as it causes a
|
|
BLOCKING behavior which is a NO-NO. This function should rather be
|
|
split up in a do and a doing piece where the pieces that aren't
|
|
possible to send now will be sent in the doing function repeatedly
|
|
until the entire request is sent.
|
|
|
|
Wait a while for the socket to be writable. Note that this doesn't
|
|
acknowledge the timeout.
|
|
*/
|
|
Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100);
|
|
}
|
|
|
|
free(sel_org);
|
|
|
|
/* We can use Curl_sendf to send the terminal \r\n relatively safely and
|
|
save allocing another string/doing another _write loop. */
|
|
result = Curl_sendf(sockfd, conn, "\r\n");
|
|
if(result) {
|
|
failf(data, "Failed sending Gopher request");
|
|
return result;
|
|
}
|
|
result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2);
|
|
if(result)
|
|
return result;
|
|
|
|
Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
|
|
-1, NULL); /* no upload */
|
|
return CURLE_OK;
|
|
}
|
|
#endif /*CURL_DISABLE_GOPHER*/
|