mirror of
https://github.com/rkd77/elinks.git
synced 2024-11-04 08:17:17 -05:00
318 lines
8.2 KiB
C
318 lines
8.2 KiB
C
/* Protocol implementation manager. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "elinks.h"
|
|
|
|
#include "bfu/dialog.h"
|
|
#include "document/view.h"
|
|
#include "ecmascript/ecmascript.h"
|
|
#include "intl/gettext/libintl.h"
|
|
#include "main/module.h"
|
|
#include "network/connection.h"
|
|
#include "protocol/protocol.h"
|
|
#include "protocol/uri.h"
|
|
#include "session/session.h"
|
|
#include "terminal/terminal.h"
|
|
#include "terminal/window.h"
|
|
#include "util/memory.h"
|
|
#include "util/string.h"
|
|
|
|
/* Backends dynamic area: */
|
|
|
|
#include "protocol/about.h"
|
|
#include "protocol/bittorrent/bittorrent.h"
|
|
#include "protocol/bittorrent/connection.h"
|
|
#include "protocol/data.h"
|
|
#include "protocol/file/cgi.h"
|
|
#include "protocol/file/file.h"
|
|
#include "protocol/finger/finger.h"
|
|
#include "protocol/fsp/fsp.h"
|
|
#include "protocol/ftp/ftp.h"
|
|
#include "protocol/gopher/gopher.h"
|
|
#include "protocol/http/http.h"
|
|
#include "protocol/nntp/connection.h"
|
|
#include "protocol/nntp/nntp.h"
|
|
#include "protocol/rewrite/rewrite.h"
|
|
#include "protocol/smb/smb.h"
|
|
#include "protocol/user.h"
|
|
|
|
|
|
struct protocol_backend {
|
|
unsigned char *name;
|
|
int port;
|
|
protocol_handler_T *handler;
|
|
unsigned int need_slashes:1;
|
|
unsigned int need_slash_after_host:1;
|
|
unsigned int free_syntax:1;
|
|
unsigned int need_ssl:1;
|
|
};
|
|
|
|
static const struct protocol_backend protocol_backends[] = {
|
|
{ "about", 0, about_protocol_handler, 0, 0, 1, 0 },
|
|
{ "bittorrent", 0, bittorrent_protocol_handler, 0, 0, 1, 0 },
|
|
{ "data", 0, data_protocol_handler, 0, 0, 1, 0 },
|
|
{ "file", 0, file_protocol_handler, 1, 0, 0, 0 },
|
|
{ "finger", 79, finger_protocol_handler, 1, 1, 0, 0 },
|
|
{ "fsp", 21, fsp_protocol_handler, 1, 1, 0, 0 },
|
|
{ "ftp", 21, ftp_protocol_handler, 1, 1, 0, 0 },
|
|
{ "gopher", 70, gopher_protocol_handler, 1, 1, 0, 0 },
|
|
{ "http", 80, http_protocol_handler, 1, 1, 0, 0 },
|
|
{ "https", 443, https_protocol_handler, 1, 1, 0, 1 },
|
|
{ "javascript", 0, NULL, 0, 0, 1, 0 },
|
|
{ "news", 0, news_protocol_handler, 0, 0, 1, 0 },
|
|
{ "nntp", 119, nntp_protocol_handler, 1, 1, 0, 0 },
|
|
{ "nntps", 563, nntp_protocol_handler, 1, 1, 0, 1 },
|
|
{ "proxy", 3128, proxy_protocol_handler, 1, 1, 0, 0 },
|
|
{ "smb", 139, smb_protocol_handler, 1, 1, 0, 0 },
|
|
{ "snews", 0, news_protocol_handler, 0, 0, 1, 0 },
|
|
|
|
/* Keep these last! */
|
|
{ NULL, 0, NULL, 0, 0, 1, 0 },
|
|
|
|
{ "user", 0, NULL, 0, 0, 0, 0 },
|
|
/* Internal protocol for mapping to protocol.user.* handlers. Placed
|
|
* last because it's checked first and else should be ignored. */
|
|
{ "custom", 0, NULL, 0, 0, 1, 0 },
|
|
};
|
|
|
|
|
|
/* This function gets called quite a lot these days. With incremental rendering
|
|
* and all I counted 4400 calls alone when loading fm. With the old linear
|
|
* comparison this would lead to 30800 comparison against protocol names. The
|
|
* binary search used currently reduces it to 4400 (meaning fm only has HTTP
|
|
* links). */
|
|
|
|
enum protocol
|
|
get_protocol(unsigned char *name, int namelen)
|
|
{
|
|
/* These are really enum protocol values but can take on negative
|
|
* values and since 0 <= -1 for enum values it's better to use clean
|
|
* integer type. */
|
|
int start, end;
|
|
enum protocol protocol;
|
|
|
|
/* Almost dichotomic search is used here */
|
|
/* Starting at the HTTP entry which is the most common that will make
|
|
* file and NNTP the next entries checked and amongst the third checks
|
|
* are proxy and FTP. */
|
|
start = 0;
|
|
end = PROTOCOL_UNKNOWN - 1;
|
|
protocol = PROTOCOL_HTTP;
|
|
|
|
assert(start <= protocol && protocol <= end);
|
|
|
|
while (start <= end) {
|
|
unsigned char *pname = protocol_backends[protocol].name;
|
|
int pnamelen = strlen(pname);
|
|
int minlen = int_min(pnamelen, namelen);
|
|
int compare = strncasecmp(pname, name, minlen);
|
|
|
|
if (compare == 0) {
|
|
if (pnamelen == namelen)
|
|
return protocol;
|
|
|
|
/* If the current protocol name is longer than the
|
|
* protocol name being searched for move @end else move
|
|
* @start. */
|
|
compare = pnamelen > namelen ? 1 : -1;
|
|
}
|
|
|
|
if (compare > 0)
|
|
end = protocol - 1;
|
|
else
|
|
start = protocol + 1;
|
|
|
|
protocol = (start + end) / 2;
|
|
}
|
|
/* Custom (protocol.user) protocol has higher precedence than builtin
|
|
* handlers, but we will check for it when following a link.
|
|
* Calling get_user_program for every link is too expensive. --witekfl */
|
|
/* TODO: In order to fully give higher precedence to user chosen
|
|
* protocols we have to get some terminal to pass along. */
|
|
|
|
if (get_user_program(NULL, name, namelen))
|
|
return PROTOCOL_USER;
|
|
|
|
return PROTOCOL_UNKNOWN;
|
|
}
|
|
|
|
|
|
#define VALID_PROTOCOL(p) (0 <= (p) && (p) < PROTOCOL_BACKENDS)
|
|
|
|
int
|
|
get_protocol_port(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return 0;
|
|
|
|
assert(uri_port_is_valid(protocol_backends[protocol].port));
|
|
if_assert_failed return 0;
|
|
|
|
return protocol_backends[protocol].port;
|
|
}
|
|
|
|
int
|
|
get_protocol_need_slashes(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return 0;
|
|
return protocol_backends[protocol].need_slashes;
|
|
}
|
|
|
|
int
|
|
get_protocol_need_slash_after_host(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return 0;
|
|
return protocol_backends[protocol].need_slash_after_host;
|
|
}
|
|
|
|
int
|
|
get_protocol_free_syntax(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return 0;
|
|
return protocol_backends[protocol].free_syntax;
|
|
}
|
|
|
|
int
|
|
get_protocol_need_ssl(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return 0;
|
|
return protocol_backends[protocol].need_ssl;
|
|
}
|
|
|
|
protocol_handler_T *
|
|
get_protocol_handler(enum protocol protocol)
|
|
{
|
|
assert(VALID_PROTOCOL(protocol));
|
|
if_assert_failed return NULL;
|
|
return protocol_backends[protocol].handler;
|
|
}
|
|
|
|
|
|
static void
|
|
generic_external_protocol_handler(struct session *ses, struct uri *uri)
|
|
{
|
|
/* [gettext_accelerator_context(generic_external_protocol_handler)] */
|
|
enum connection_state state;
|
|
|
|
switch (uri->protocol) {
|
|
case PROTOCOL_JAVASCRIPT:
|
|
#ifdef CONFIG_ECMASCRIPT
|
|
ecmascript_protocol_handler(ses, uri);
|
|
return;
|
|
#else
|
|
state = S_NO_JAVASCRIPT;
|
|
#endif
|
|
break;
|
|
|
|
case PROTOCOL_UNKNOWN:
|
|
state = S_UNKNOWN_PROTOCOL;
|
|
break;
|
|
|
|
default:
|
|
#ifndef CONFIG_SSL
|
|
if (get_protocol_need_ssl(uri->protocol)) {
|
|
state = S_SSL_ERROR;
|
|
break;
|
|
}
|
|
#endif
|
|
msg_box(ses->tab->term, NULL, MSGBOX_FREE_TEXT,
|
|
N_("Error"), ALIGN_CENTER,
|
|
msg_text(ses->tab->term,
|
|
N_("This version of ELinks does not contain "
|
|
"%s protocol support"),
|
|
protocol_backends[uri->protocol].name),
|
|
ses, 1,
|
|
N_("~OK"), NULL, B_ENTER | B_ESC);
|
|
return;
|
|
}
|
|
|
|
print_error_dialog(ses, state, uri, PRI_CANCEL);
|
|
}
|
|
|
|
protocol_external_handler_T *
|
|
get_protocol_external_handler(struct terminal *term, struct uri *uri)
|
|
{
|
|
unsigned char *prog;
|
|
|
|
assert(uri && VALID_PROTOCOL(uri->protocol));
|
|
if_assert_failed return NULL;
|
|
|
|
prog = get_user_program(term, struri(uri), uri->protocollen);
|
|
if (prog && *prog)
|
|
return user_protocol_handler;
|
|
|
|
if (!protocol_backends[uri->protocol].handler)
|
|
return generic_external_protocol_handler;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static struct option_info protocol_options[] = {
|
|
INIT_OPT_TREE("", N_("Protocols"),
|
|
"protocol", OPT_SORT,
|
|
N_("Protocol specific options.")),
|
|
|
|
INIT_OPT_STRING("protocol", N_("No-proxy domains"),
|
|
"no_proxy", 0, "",
|
|
N_("Comma separated list of domains for which the proxy (HTTP/FTP)\n"
|
|
"should be disabled. Optionally, a port can be specified for some\n"
|
|
"domains as well. If it's blank, NO_PROXY environment variable is\n"
|
|
"checked as well.")),
|
|
|
|
NULL_OPTION_INFO,
|
|
};
|
|
static struct module *protocol_submodules[] = {
|
|
#ifdef CONFIG_BITTORRENT
|
|
&bittorrent_protocol_module,
|
|
#endif
|
|
&file_protocol_module,
|
|
#ifdef CONFIG_CGI
|
|
&cgi_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_FINGER
|
|
&finger_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_FSP
|
|
&fsp_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_FTP
|
|
&ftp_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_GOPHER
|
|
&gopher_protocol_module,
|
|
#endif
|
|
&http_protocol_module,
|
|
#ifdef CONFIG_NNTP
|
|
&nntp_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_SMB
|
|
&smb_protocol_module,
|
|
#endif
|
|
#ifdef CONFIG_URI_REWRITE
|
|
&uri_rewrite_module,
|
|
#endif
|
|
&user_protocol_module,
|
|
NULL,
|
|
};
|
|
|
|
struct module protocol_module = struct_module(
|
|
/* name: */ N_("Protocol"),
|
|
/* options: */ protocol_options,
|
|
/* hooks: */ NULL,
|
|
/* submodules: */ protocol_submodules,
|
|
/* data: */ NULL,
|
|
/* init: */ NULL,
|
|
/* done: */ NULL
|
|
);
|