mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-24 23:39:51 +03:00
398 lines
9.5 KiB
C
398 lines
9.5 KiB
C
/*
|
|
* Copyright 2011 Vincent Sanders <vince@netsurf-browser.org>
|
|
*
|
|
* This file is part of NetSurf.
|
|
*
|
|
* NetSurf 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; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* about: URL handling. Based on the data fetcher by Rob Kendrick */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stdbool.h>
|
|
#include <inttypes.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <time.h>
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
#include <limits.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "utils/config.h"
|
|
#include "content/dirlist.h"
|
|
#include "content/fetch.h"
|
|
#include "content/fetchers/about.h"
|
|
#include "content/urldb.h"
|
|
#include "desktop/netsurf.h"
|
|
#include "desktop/options.h"
|
|
#include "utils/log.h"
|
|
#include "utils/messages.h"
|
|
#include "utils/url.h"
|
|
#include "utils/utils.h"
|
|
#include "utils/ring.h"
|
|
|
|
struct fetch_about_context;
|
|
|
|
typedef bool (*fetch_about_handler)(struct fetch_about_context *);
|
|
|
|
/** Context for an about fetch */
|
|
struct fetch_about_context {
|
|
struct fetch_about_context *r_next, *r_prev;
|
|
|
|
struct fetch *fetchh; /**< Handle for this fetch */
|
|
|
|
bool aborted; /**< Flag indicating fetch has been aborted */
|
|
bool locked; /**< Flag indicating entry is already entered */
|
|
|
|
char *url; /**< The full url the fetch refers to */
|
|
|
|
fetch_about_handler handler;
|
|
};
|
|
|
|
static struct fetch_about_context *ring = NULL;
|
|
|
|
/** issue fetch callbacks with locking */
|
|
static inline bool fetch_about_send_callback(fetch_msg msg,
|
|
struct fetch_about_context *ctx, const void *data,
|
|
unsigned long size, fetch_error_code errorcode)
|
|
{
|
|
ctx->locked = true;
|
|
fetch_send_callback(msg, ctx->fetchh, data, size, errorcode);
|
|
ctx->locked = false;
|
|
|
|
return ctx->aborted;
|
|
}
|
|
|
|
static bool fetch_about_send_header(struct fetch_about_context *ctx,
|
|
const char *fmt, ...)
|
|
{
|
|
char header[64];
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
|
|
vsnprintf(header, sizeof header, fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
fetch_about_send_callback(FETCH_HEADER, ctx, header, strlen(header),
|
|
FETCH_ERROR_NO_ERROR);
|
|
|
|
return ctx->aborted;
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool fetch_about_blank_handler(struct fetch_about_context *ctx)
|
|
{
|
|
char buffer[2];
|
|
int code = 200;
|
|
|
|
/* content is going to return ok */
|
|
fetch_set_http_code(ctx->fetchh, code);
|
|
|
|
/* content type */
|
|
if (fetch_about_send_header(ctx, "Content-Type: text/html"))
|
|
goto fetch_about_blank_handler_aborted;
|
|
|
|
buffer[0] = ' ';
|
|
buffer[1] = 0;
|
|
if (fetch_about_send_callback(FETCH_DATA, ctx, buffer, strlen(buffer),
|
|
FETCH_ERROR_NO_ERROR))
|
|
goto fetch_about_blank_handler_aborted;
|
|
|
|
fetch_about_send_callback(FETCH_FINISHED, ctx, 0, 0,
|
|
FETCH_ERROR_NO_ERROR);
|
|
|
|
return true;
|
|
|
|
fetch_about_blank_handler_aborted:
|
|
return false;
|
|
}
|
|
|
|
|
|
static bool fetch_about_credits_handler(struct fetch_about_context *ctx)
|
|
{
|
|
/* content is going to return redirect */
|
|
fetch_set_http_code(ctx->fetchh, 302);
|
|
|
|
fetch_about_send_callback(FETCH_REDIRECT, ctx, "resource:credits.html",
|
|
0, FETCH_ERROR_NO_ERROR);
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool fetch_about_config_handler(struct fetch_about_context *ctx)
|
|
{
|
|
char buffer[1024];
|
|
int code = 200;
|
|
int slen;
|
|
unsigned int opt_loop = 0;
|
|
int res = 0;
|
|
|
|
/* content is going to return ok */
|
|
fetch_set_http_code(ctx->fetchh, code);
|
|
|
|
/* content type */
|
|
if (fetch_about_send_header(ctx, "Content-Type: text/html"))
|
|
goto fetch_about_config_handler_aborted;
|
|
|
|
slen = snprintf(buffer, sizeof buffer,
|
|
"<html><head><title>NetSurf Browser Config</title>"
|
|
"<style type=\"text/css\">"
|
|
".null-content { font-style: italic }"
|
|
"</style></head>"
|
|
"<body><h1>NetSurf Browser Config</h1>"
|
|
"<table><tr><th></th><th></th><th></th></tr>");
|
|
|
|
do {
|
|
res = options_snoptionf(buffer + slen, sizeof buffer - slen,
|
|
opt_loop,
|
|
"<tr><td>%k</td><td>%t</td><td>%V</td></tr>");
|
|
if (res <= 0)
|
|
break; /* last option */
|
|
|
|
if (res >= (int) (sizeof buffer - slen)) {
|
|
/* last entry would not fit in buffer, submit buffer */
|
|
if (fetch_about_send_callback(FETCH_DATA, ctx, buffer,
|
|
slen, FETCH_ERROR_NO_ERROR))
|
|
goto fetch_about_config_handler_aborted;
|
|
slen = 0;
|
|
} else {
|
|
/* normal addition */
|
|
slen += res;
|
|
opt_loop++;
|
|
}
|
|
} while (res > 0);
|
|
|
|
slen += snprintf(buffer + slen, sizeof buffer - slen,
|
|
"</table></body></html>");
|
|
|
|
if (fetch_about_send_callback(FETCH_DATA, ctx, buffer, slen,
|
|
FETCH_ERROR_NO_ERROR))
|
|
goto fetch_about_config_handler_aborted;
|
|
|
|
fetch_about_send_callback(FETCH_FINISHED, ctx, 0, 0,
|
|
FETCH_ERROR_NO_ERROR);
|
|
|
|
return true;
|
|
|
|
fetch_about_config_handler_aborted:
|
|
return false;
|
|
}
|
|
|
|
/** Generate the text of a Choices file which represents the current
|
|
* in use options.
|
|
*/
|
|
static bool fetch_about_choices_handler(struct fetch_about_context *ctx)
|
|
{
|
|
char buffer[1024];
|
|
int code = 200;
|
|
int slen;
|
|
unsigned int opt_loop = 0;
|
|
int res = 0;
|
|
|
|
/* content is going to return ok */
|
|
fetch_set_http_code(ctx->fetchh, code);
|
|
|
|
/* content type */
|
|
if (fetch_about_send_header(ctx, "Content-Type: text/plain"))
|
|
goto fetch_about_choices_handler_aborted;
|
|
|
|
slen = snprintf(buffer, sizeof buffer,
|
|
"# Automatically generated current NetSurf browser Choices\n");
|
|
|
|
do {
|
|
res = options_snoptionf(buffer + slen,
|
|
sizeof buffer - slen,
|
|
opt_loop,
|
|
"%k:%v\n");
|
|
if (res <= 0)
|
|
break; /* last option */
|
|
|
|
if (res >= (int) (sizeof buffer - slen)) {
|
|
/* last entry would not fit in buffer, submit buffer */
|
|
if (fetch_about_send_callback(FETCH_DATA, ctx, buffer,
|
|
slen, FETCH_ERROR_NO_ERROR))
|
|
goto fetch_about_choices_handler_aborted;
|
|
slen = 0;
|
|
} else {
|
|
/* normal addition */
|
|
slen += res;
|
|
opt_loop++;
|
|
}
|
|
} while (res > 0);
|
|
|
|
if (fetch_about_send_callback(FETCH_DATA, ctx, buffer, slen,
|
|
FETCH_ERROR_NO_ERROR))
|
|
goto fetch_about_choices_handler_aborted;
|
|
|
|
fetch_about_send_callback(FETCH_FINISHED, ctx, 0, 0,
|
|
FETCH_ERROR_NO_ERROR);
|
|
|
|
return true;
|
|
|
|
fetch_about_choices_handler_aborted:
|
|
return false;
|
|
}
|
|
|
|
|
|
struct about_handlers {
|
|
const char *name;
|
|
fetch_about_handler handler;
|
|
};
|
|
|
|
struct about_handlers about_handler_list[] = {
|
|
{ "credits", fetch_about_credits_handler },
|
|
{ "config", fetch_about_config_handler },
|
|
{ "Choices", fetch_about_choices_handler },
|
|
{ "blank", fetch_about_blank_handler } /* The default */
|
|
};
|
|
|
|
#define about_handler_list_len (sizeof(about_handler_list) / sizeof(struct about_handlers))
|
|
|
|
/** callback to initialise the about fetcher. */
|
|
static bool fetch_about_initialise(const char *scheme)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/** callback to initialise the about fetcher. */
|
|
static void fetch_about_finalise(const char *scheme)
|
|
{
|
|
}
|
|
|
|
/** callback to set up a about fetch context. */
|
|
static void *
|
|
fetch_about_setup(struct fetch *fetchh,
|
|
const char *url,
|
|
bool only_2xx,
|
|
const char *post_urlenc,
|
|
const struct fetch_multipart_data *post_multipart,
|
|
const char **headers)
|
|
{
|
|
struct fetch_about_context *ctx;
|
|
unsigned int handler_loop;
|
|
struct url_components urlcomp;
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
url_get_components(url, &urlcomp);
|
|
|
|
for (handler_loop = 0;
|
|
handler_loop < about_handler_list_len;
|
|
handler_loop++) {
|
|
ctx->handler = about_handler_list[handler_loop].handler;
|
|
if (strcmp(about_handler_list[handler_loop].name, urlcomp.path) == 0)
|
|
break;
|
|
}
|
|
|
|
url_destroy_components(&urlcomp);
|
|
|
|
ctx->fetchh = fetchh;
|
|
|
|
RING_INSERT(ring, ctx);
|
|
|
|
return ctx;
|
|
}
|
|
|
|
/** callback to free a about fetch */
|
|
static void fetch_about_free(void *ctx)
|
|
{
|
|
struct fetch_about_context *c = ctx;
|
|
free(c->url);
|
|
RING_REMOVE(ring, c);
|
|
free(ctx);
|
|
}
|
|
|
|
/** callback to start a about fetch */
|
|
static bool fetch_about_start(void *ctx)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/** callback to abort a about fetch */
|
|
static void fetch_about_abort(void *ctx)
|
|
{
|
|
struct fetch_about_context *c = ctx;
|
|
|
|
/* To avoid the poll loop having to deal with the fetch context
|
|
* disappearing from under it, we simply flag the abort here.
|
|
* The poll loop itself will perform the appropriate cleanup.
|
|
*/
|
|
c->aborted = true;
|
|
}
|
|
|
|
|
|
/** callback to poll for additional about fetch contents */
|
|
static void fetch_about_poll(const char *scheme)
|
|
{
|
|
struct fetch_about_context *c, *next;
|
|
|
|
if (ring == NULL) return;
|
|
|
|
/* Iterate over ring, processing each pending fetch */
|
|
c = ring;
|
|
do {
|
|
/* Ignore fetches that have been flagged as locked.
|
|
* This allows safe re-entrant calls to this function.
|
|
* Re-entrancy can occur if, as a result of a callback,
|
|
* the interested party causes fetch_poll() to be called
|
|
* again.
|
|
*/
|
|
if (c->locked == true) {
|
|
next = c->r_next;
|
|
continue;
|
|
}
|
|
|
|
/* Only process non-aborted fetches */
|
|
if (c->aborted == false) {
|
|
/* about fetches can be processed in one go */
|
|
c->handler(c);
|
|
}
|
|
|
|
/* Compute next fetch item at the last possible moment
|
|
* as processing this item may have added to the ring
|
|
*/
|
|
next = c->r_next;
|
|
|
|
fetch_remove_from_queues(c->fetchh);
|
|
fetch_free(c->fetchh);
|
|
|
|
/* Advance to next ring entry, exiting if we've reached
|
|
* the start of the ring or the ring has become empty
|
|
*/
|
|
} while ( (c = next) != ring && ring != NULL);
|
|
}
|
|
|
|
void fetch_about_register(void)
|
|
{
|
|
fetch_add_fetcher("about",
|
|
fetch_about_initialise,
|
|
fetch_about_setup,
|
|
fetch_about_start,
|
|
fetch_about_abort,
|
|
fetch_about_free,
|
|
fetch_about_poll,
|
|
fetch_about_finalise);
|
|
}
|