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[dgi] Beginning. Not compilable code

This commit is contained in:
Witold Filipczyk 2022-05-16 22:01:41 +02:00
parent 2b5e274473
commit f4979cb5a4
7 changed files with 272 additions and 0 deletions

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@ -1478,6 +1478,9 @@ EL_ARG_ENABLE(CONFIG_URI_REWRITE, uri-rewrite, [URI rewriting],
EL_ARG_DEPEND(CONFIG_CGI, cgi, [HAVE_SETENV_OR_PUTENV:yes], [Local CGI],
[ --enable-cgi enable local CGI support])
EL_ARG_ENABLE(CONFIG_DGI, dgi, [DOS Gateway Interface],
[ --enable-dgi enable DGI support])
EL_ARG_ENABLE(CONFIG_FINGER, finger, [Finger protocol],
[ --enable-finger enable finger protocol support])

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@ -31,6 +31,7 @@ conf_data.set('CONFIG_GEMINI', get_option('gemini'))
conf_data.set('CONFIG_URI_REWRITE', get_option('uri-rewrite'))
conf_data.set('CONFIG_CGI', get_option('cgi'))
conf_data.set('CONFIG_DGI', get_option('dgi'))
conf_data.set('CONFIG_FINGER', get_option('finger'))
conf_data.set('CONFIG_FSP', get_option('fsp'))
conf_data.set('CONFIG_FTP', get_option('ftp'))

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@ -68,3 +68,5 @@ option('static', type: 'boolean', value: false, description: 'link static binary
option('reproducible', type: 'boolean', value: false, description: 'reproducible build')
option('source-date-epoch', type: 'string', value: '', description: 'source date epoch for reproducible builds')
option('dgi', type: 'boolean', value: false, description: 'DOS Gateway Interface support')

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@ -2,6 +2,7 @@ top_builddir=../../..
include $(top_builddir)/Makefile.config
OBJS-$(CONFIG_CGI) += cgi.o
OBJS-$(CONFIG_DGI) += dgi.o
OBJS = file.o mailcap.o

243
src/protocol/file/dgi.c Normal file
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@ -0,0 +1,243 @@
/* Internal "dgi" protocol implementation */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> /* OS/2 needs this after sys/types.h */
#endif
#include <sys/stat.h> /* OS/2 needs this after sys/types.h */
#ifdef HAVE_FCNTL_H
#include <fcntl.h> /* OS/2 needs this after sys/types.h */
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "elinks.h"
#include "config/options.h"
#include "cookies/cookies.h"
#include "intl/libintl.h"
#include "mime/backend/common.h"
#include "network/connection.h"
#include "network/progress.h"
#include "network/socket.h"
#include "osdep/osdep.h"
#include "osdep/sysname.h"
#include "osdep/types.h"
#include "protocol/common.h"
#include "protocol/file/dgi.h"
#include "protocol/http/http.h"
#include "protocol/uri.h"
#include "terminal/terminal.h"
#include "util/conv.h"
#include "util/env.h"
#include "util/string.h"
static union option_info dgi_options[] = {
INIT_OPT_TREE("protocol.file", N_("DGI"),
"dgi", OPT_ZERO,
N_("Dos gateway interface specific options.")),
NULL_OPTION_INFO,
};
struct dgi_entry {
const char *name;
const char *cmdline;
};
struct dgi_entry *entries[] = {
{ "cdplayer.dgi", "cdplayer.exe $q" },
NULL
};
struct module dgi_protocol_module = struct_module(
/* name: */ N_("Dos Gateway Interface (DGI)"),
/* options: */ dgi_options,
/* hooks: */ NULL,
/* submodules: */ NULL,
/* data: */ NULL,
/* init: */ NULL,
/* done: */ NULL
);
static struct dgi_entry *
find_dgi(const char *name)
{
if (!strcmp(name, "cdplayer.dgi")) {
return entries[0];
}
return NULL;
}
static void
write_request_to_file(struct connection *conn, const char *filename)
{
if (!conn->uri->post) {
return;
}
FILE *f = fopen(filename, "wb");
if (f) {
char *post = conn->uri->post;
char *postend = strchr(post, '\n');
if (postend) {
post = postend + 1;
}
struct http_connection_info *http = (struct http_connection_info *)conn->info;
fwrite(post, 1, http->post.total_upload_length, f);
fclose(f);
}
}
enum dgi_state {
NORMAL,
DOLAR
};
static void
prepare_command(struct dgi_entry *entry, struct string *cmd, char **temp, char **out)
{
const char *ch;
dgi_state state = NORMAL;
for (ch = entry->cmdline; *ch; ch++) {
switch (state) {
NORMAL:
default:
if (*ch == '$') {
state = DOLAR;
} else {
add_char_to_string(cmd, *ch);
}
break;
case DOLAR:
switch(*ch) {
case 'q':
add_to_string(cmd, post);
state = NORMAL;
case 't':
*temp = tempnam();
state = NORMAL;
break;
case 'o':
*out = tempnam();
state = NORMAL;
break;
default:
add_to_string(cmd, *ch);
break;
}
break;
}
}
}
int
execute_dgi(struct connection *conn)
{
char *script;
struct dgi_entry *entry;
struct string command;
char *tempfilename = NULL;
char *outputfilename = NULL;
struct connection_state state = connection_state(S_OK);
/* Not file referrer */
if (conn->referrer && conn->referrer->protocol != PROTOCOL_FILE) {
return 1;
}
script = get_uri_string(conn->uri, URI_PATH);
if (!script) {
state = connection_state(S_OUT_OF_MEM);
abort_connection(conn, state);
return 0;
}
entry = find_dgi(script);
if (!entry) {
mem_free(script);
return 0;
}
if (!init_string(&command)) {
mem_free(script);
return 0;
}
prepare_command(entry, &command, &tempfilename, &outputfilename);
if (tempfilename) {
write_request_to_file(conn, tempfilename);
}
system(command.source);
done_string(&command);
mem_free(script);
if (tempfilename) {
unlink(tempfilename);
}
if (!outputfilename) {
return 0;
}
struct string page;
struct string name;
if (!init_string(&name)) {
unlink(outputfilename);
return 0;
}
add_to_string(&name, outputfilename);
state = read_encoded_file(&name, &page);
unlink(outputfilename);
done_string(&name);
if (is_in_state(state, S_OK)) {
struct cache_entry *cached;
/* Try to add fragment data to the connection cache if either
* file reading or directory listing worked out ok. */
cached = conn->cached = get_cache_entry(conn->uri);
if (!conn->cached) {
state = connection_state(S_OUT_OF_MEM);
} else {
add_fragment(cached, 0, page.source, page.length);
conn->from += page.length;
if (1) {
char *head;
/* If the system charset somehow
* changes after the directory listing
* has been generated, it should be
* parsed with the original charset. */
head = straconcat("\r\nContent-Type: text/html; charset=",
get_cp_mime_name(get_cp_index("System")),
"\r\n", (char *) NULL);
/* Not so gracefully handle failed memory
* allocation. */
if (!head)
state = connection_state(S_OUT_OF_MEM);
/* Setup directory listing for viewing. */
mem_free_set(&cached->head, head);
}
done_string(&page);
}
}
abort_connection(conn, state);
return 0;
}

19
src/protocol/file/dgi.h Normal file
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@ -0,0 +1,19 @@
#ifndef EL__PROTOCOL_FILE_DGI_H
#define EL__PROTOCOL_FILE_DGI_H
#ifdef __cplusplus
extern "C" {
#endif
struct connection;
struct module;
extern struct module dgi_protocol_module;
int execute_dgi(struct connection *);
#ifdef __cplusplus
}
#endif
#endif

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@ -1,4 +1,7 @@
if conf_data.get('CONFIG_CGI')
srcs += files('cgi.c')
endif
if conf_data.get('CONFIG_DGI')
srcs += files('dgi.c')
endif
srcs += files('file.c', 'mailcap.c')