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/*
* Copyright 2025, Vincent Douillet <vincent@vdouillet.fr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <kcgi.h>
#include <kcgihtml.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "browse.h"
#include "cgi.h"
#include "http.h"
#include "template.h"
#include "create.h"
#include "url.h"
/*
* create url = r->pname / CREATE_URL / file->path
*/
size_t
build_create_url(const struct kreq * r, struct file * file)
{
char action_url[PATH_MAX];
size_t action_url_len;
if (!file->is_dir)
return 0;
action_url_len = url_build(action_url, PATH_MAX, r->pname, CREATE_URL,
file->path, NULL);
if (action_url_len == 0 || action_url_len >= PATH_MAX) {
kutil_warn(r, NULL,
"create: action URL overflow: %s", action_url);
return 0;
}
file->action_url = strndup(action_url, action_url_len);
if (file->action_url == NULL) {
kutil_warn(r, NULL,
"create: unable to allocate file url buffer: %s",
action_url);
return 0;
}
return action_url_len;
}
/*
* data required in the template functions
*/
struct template_data {
struct kreq *r;
struct khtmlreq *html;
struct file *f;
};
static const char *const header_template_keys[] = {"path", "submit_url"};
static int
header_template_callback(size_t index, void *arg)
{
struct kreq *r;
struct khtmlreq *html;
struct template_data *data;
if (arg == NULL) {
kutil_warn(NULL, NULL,
"Invalid data for create header template");
return 0;
}
data = arg;
r = data->r;
html = data->html;
switch (index) {
case 0:
/* path */
K_OK(khtml_puts(html, data->f->path), r);
break;
case 1:
/* submit_url */
K_OK(khtml_puts(html, data->f->action_url), r);
break;
default:
kutil_warnx(r, NULL,
"Invalid key index for create header template: %zd",
index);
return 0;
}
return 1;
}
/*
* GET request, we print create form
*/
void
create_get(struct kreq * r, struct file * file)
{
struct khtmlreq html;
struct ktemplate template;
struct page_template *tmpl;
struct template_data data;
tmpl = NULL;
/* action url is form submit url */
if (build_create_url(r, file) == 0) {
http_exit(r, KHTTP_500, "create: Can't build create url");
goto end;
}
/* read template */
tmpl = page_template_new(CREATE_URL);
if (tmpl == NULL) {
http_exit(r, KHTTP_500, "create: Unable to read template");
goto end;
}
/* print create form */
http_open(r, KHTTP_200, KMIME_TEXT_HTML);
K_OK(khttp_puts(r, tmpl->header), r);
K_OK(khtml_open(&html, r, 0), r);
template.key = header_template_keys;
template.keysz = 2;
template.cb = header_template_callback;
template.arg = &data;
data.r = r;
data.html = &html;
data.f = file;
K_OK(khttp_template_buf(r, &template, tmpl->page_header,
strlen(tmpl->page_header)), r);
K_OK(khttp_puts(r, tmpl->page_footer), r);
K_OK(khttp_puts(r, tmpl->footer), r);
K_OK(khtml_close(&html), r);
end:
page_template_free(tmpl);
}
/*
* POST request, we handle create form
*/
void
create_post(struct kreq * r, struct file * f)
{
char path[PATH_MAX];
size_t path_len, i;
struct kpair *name;
/* prepare action url for return redirection in case of success */
if (build_browse_url(r, f) == 0) {
http_exit(r, KHTTP_500, "create: can't build return url");
return;
}
/* validate input data */
if (r->fieldsz != 1) {
http_exit(r, KHTTP_400, "create: missing folder name");
return;
}
name = &(r->fields[0]);
/*
* TODO name->val == NULL is not enough, need better sanitization
* for example, some chars are not allowed in a folder name
* an empty non-NULL string is also not ok
*/
if (strncmp(name->key, "name", 4) || name->val == NULL) {
http_exit(r, KHTTP_400, "create: invalide folder name");
return;
}
path_len = file_get_data_path(f, path, PATH_MAX, name->val);
if (path_len == 0 || path_len >= PATH_MAX) {
http_exit(r, KHTTP_500,
"create: can't build file path");
return;
}
/* TODO check if folder already exists */
if (mkdir(path, 0755)) {
http_exit(r, KHTTP_500,
"create: can't create directory");
return;
}
/* on success, redirect to the new folder */
khttp_head(r, kresps[KRESP_LOCATION], "%s", f->action_url);
http_open(r, KHTTP_303, r->mime);
}
void
create(struct kreq * r)
{
struct file *file;
file = NULL;
/* build file corresponding to request (ie. create) path */
file = file_new(r->path);
if (file == NULL) {
http_exit(r, KHTTP_404, "create: Unable to build data file");
goto end;
}
/* print form or handle submission according to HTTP method */
if (r->method == KMETHOD_POST)
create_post(r, file);
else
create_get(r, file);
end:
file_free(file);
}
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