#define PROJECT_TITLE "slcl, a suckless cloud"
#define DOCTYPE_TAG "\n"
#define PROJECT_NAME "slcl"
#define PROJECT_URL "https://gitea.privatedns.org/Xavi92/" PROJECT_NAME
#define LOGIN_HEAD \
" \n" \
" \n" \
PROJECT_TITLE "\n"
#define STYLE_A ""
#define LOGIN_BODY \
"\n" \
" \n"
static int prepare_name(struct html_node *const n, struct stat *const sb,
const char *const dir, const char *const name)
{
int ret = -1;
struct html_node *a;
struct dynstr d, dname;
const char *const sep = S_ISDIR(sb->st_mode) ? "/" : "";
dynstr_init(&d);
dynstr_init(&dname);
if (dynstr_append(&d, "%s%s%s", dir, name, sep))
{
fprintf(stderr, "%s: dynstr_append [1] failed\n", __func__);
goto end;
}
else if (!(a = html_node_add_child(n, "a")))
{
fprintf(stderr, "%s: html_node_add_child failed\n", __func__);
goto end;
}
else if (html_node_add_attr(a, "href", d.str))
{
fprintf(stderr, "%s: html_node_add_attr href failed\n", __func__);
goto end;
}
else if (dynstr_append(&dname, "%s%s", name, sep))
{
fprintf(stderr, "%s: dynstr_append [2] failed\n", __func__);
goto end;
}
else if (html_node_set_value(a, dname.str))
{
fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
goto end;
}
ret = 0;
end:
dynstr_free(&d);
dynstr_free(&dname);
return ret;
}
static int prepare_size(struct html_node *const n, const struct stat *const sb)
{
if (!S_ISREG(sb->st_mode))
return 0;
float sz;
size_t suffix_i;
for (sz = sb->st_size, suffix_i = 0; (off_t)sz / 1024;
suffix_i++, sz /= 1024.0f)
;
static const char *const suffixes[] = {"B", "KiB", "MiB", "GiB", "TiB"};
char buf[sizeof "18446744073709551615.0 XiB"];
const int r = suffix_i ?
snprintf(buf, sizeof buf, "%.1f %s", sz, suffixes[suffix_i])
: snprintf(buf, sizeof buf, "%ju %s",
(uintmax_t)sb->st_size, suffixes[suffix_i]);
if (r >= sizeof buf || r < 0)
{
fprintf(stderr, "%s: snprintf(3) failed with %d\n", __func__, r);
return -1;
}
else if (html_node_set_value(n, buf))
{
fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
return -1;
}
return 0;
}
static int prepare_date(struct html_node *const n, const struct stat *const sb)
{
struct tm tm;
if (!localtime_r(&sb->st_mtime, &tm))
{
fprintf(stderr, "%s: localtime_r(3): %s\n", __func__, strerror(errno));
return -1;
}
char date[sizeof "0000-00-00T00:00:00+0000"];
if (!strftime(date, sizeof date, "%Y-%m-%dT%H:%M:%S%z", &tm))
{
fprintf(stderr, "%s: strftime(3) failed\n", __func__);
return -1;
}
else if (html_node_set_value(n, date))
{
fprintf(stderr, "%s: html_node_set_value failed\n", __func__);
return -1;
}
return 0;
}
static int add_element(struct html_node *const n, const char *const dir,
const char *const res, const char *const name)
{
int ret = -1;
enum {NAME, SIZE, DATE, COLUMNS};
struct html_node *tr, *td[COLUMNS];
struct dynstr path;
const char *const sep = res[strlen(res) - 1] != '/' ? "/" : "";
dynstr_init(&path);
if (dynstr_append(&path, "%s%s%s", res, sep, name))
{
fprintf(stderr, "%s: dynstr_append failed\n", __func__);
goto end;
}
else if (!(tr = html_node_add_child(n, "tr")))
{
fprintf(stderr, "%s: html_node_add_child tr failed\n", __func__);
goto end;
}
for (size_t i = 0; i < sizeof td / sizeof *td; i++)
if (!(td[i] = html_node_add_child(tr, "td")))
{
fprintf(stderr, "%s: html_node_add_child td[%zu] failed\n",
__func__, i);
goto end;
}
struct stat sb;
if (stat(path.str, &sb))
{
fprintf(stderr, "%s: stat(2) %s: %s\n",
__func__, path.str, strerror(errno));
goto end;
}
else if (prepare_name(td[NAME], &sb, dir, name))
{
fprintf(stderr, "%s: prepare_name failed\n", __func__);
goto end;
}
else if (prepare_size(td[SIZE], &sb))
{
fprintf(stderr, "%s: prepare_size failed\n", __func__);
goto end;
}
else if (prepare_date(td[DATE], &sb))
{
fprintf(stderr, "%s: prepare_date failed\n", __func__);
goto end;
}
ret = 0;
end:
dynstr_free(&path);
return ret;
}
static int prepare_upload_form(struct html_node *const n, const char *const dir)
{
struct html_node *div, *hidden, *form, *submit, *input;
if (!(div = html_node_add_child(n, "div")))
{
fprintf(stderr, "%s: html_node_add_child div failed\n", __func__);
return -1;
}
else if (!(form = html_node_add_child(div, "form")))
{
fprintf(stderr, "%s: html_node_add_child form failed\n", __func__);
return -1;
}
else if (!(hidden = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child hidden failed\n", __func__);
return -1;
}
else if (!(input = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child input failed\n", __func__);
return -1;
}
else if (!(submit = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child submit failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "method", "post"))
{
fprintf(stderr, "%s: html_node_add_attr method failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "action", "/upload"))
{
fprintf(stderr, "%s: html_node_add_attr method failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "enctype", "multipart/form-data"))
{
fprintf(stderr, "%s: html_node_add_attr enctype failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "type", "hidden"))
{
fprintf(stderr, "%s: html_node_add_attr hidden failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "name", "dir"))
{
fprintf(stderr, "%s: html_node_add_attr dir failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "value", dir))
{
fprintf(stderr, "%s: html_node_add_attr hidden value failed\n",
__func__);
return -1;
}
else if (html_node_add_attr(submit, "type", "submit"))
{
fprintf(stderr, "%s: html_node_add_attr submit failed\n", __func__);
return -1;
}
else if (html_node_add_attr(submit, "value", "Upload file"))
{
fprintf(stderr, "%s: html_node_add_attr value failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "type", "file"))
{
fprintf(stderr, "%s: html_node_add_attr file failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "name", "file"))
{
fprintf(stderr, "%s: html_node_add_attr name failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "multiple", NULL))
{
fprintf(stderr, "%s: html_node_add_attr multiple failed\n", __func__);
return -1;
}
return 0;
}
static int prepare_mkdir_form(struct html_node *const n, const char *const dir)
{
struct html_node *div, *form, *hidden, *submit, *input;
if (!(div = html_node_add_child(n, "div")))
{
fprintf(stderr, "%s: html_node_add_child div failed\n", __func__);
return -1;
}
else if (!(form = html_node_add_child(div, "form")))
{
fprintf(stderr, "%s: html_node_add_child form failed\n", __func__);
return -1;
}
else if (!(input = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child input failed\n", __func__);
return -1;
}
else if (!(hidden = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child hidden failed\n", __func__);
return -1;
}
else if (!(submit = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child submit failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "method", "post"))
{
fprintf(stderr, "%s: html_node_add_attr method failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "action", "/mkdir"))
{
fprintf(stderr, "%s: html_node_add_attr method failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "type", "hidden"))
{
fprintf(stderr, "%s: html_node_add_attr hidden failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "name", "dir"))
{
fprintf(stderr, "%s: html_node_add_attr dir failed\n", __func__);
return -1;
}
else if (html_node_add_attr(hidden, "value", dir))
{
fprintf(stderr, "%s: html_node_add_attr hidden value failed\n",
__func__);
return -1;
}
else if (html_node_add_attr(submit, "type", "submit"))
{
fprintf(stderr, "%s: html_node_add_attr submit failed\n", __func__);
return -1;
}
else if (html_node_add_attr(submit, "value", "Create directory"))
{
fprintf(stderr, "%s: html_node_add_attr submit value failed\n",
__func__);
return -1;
}
else if (html_node_add_attr(input, "type", "text"))
{
fprintf(stderr, "%s: html_node_add_attr text failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "name", "name"))
{
fprintf(stderr, "%s: html_node_add_attr name failed\n", __func__);
return -1;
}
return 0;
}
static int prepare_quota_form(struct html_node *const n,
const struct page_quota *const q)
{
int ret = -1;
struct html_node *progress = NULL, *div, *label;
char cur[sizeof "18446744073709551615"], max[sizeof cur];
int res = snprintf(cur, sizeof cur, "%llu", q->cur);
struct dynstr d, pd;
dynstr_init(&d);
dynstr_init(&pd);
if (res < 0 || res >= sizeof cur)
{
fprintf(stderr, "%s: snprintf(3) cur failed\n", __func__);
goto end;
}
res = snprintf(max, sizeof max, "%llu", q->max);
if (res < 0 || res >= sizeof cur)
{
fprintf(stderr, "%s: snprintf(3) max failed\n", __func__);
goto end;
}
else if (!(div = html_node_add_child(n, "div")))
{
fprintf(stderr, "%s: html_node_add_child div failed\n", __func__);
goto end;
}
else if (!(label = html_node_add_child(div, "label")))
{
fprintf(stderr, "%s: html_node_add_child label failed\n", __func__);
goto end;
}
else if (!(progress = html_node_alloc("progress")))
{
fprintf(stderr, "%s: html_node_alloc progress failed\n", __func__);
goto end;
}
else if (html_node_add_attr(progress, "value", cur))
{
fprintf(stderr, "%s: html_node_add_attr value failed\n", __func__);
goto end;
}
else if (html_node_add_attr(progress, "max", max))
{
fprintf(stderr, "%s: html_node_add_attr max failed\n", __func__);
goto end;
}
else if (dynstr_append(&pd, "%llu/%llu bytes", q->cur, q->max))
{
fprintf(stderr, "%s: dynstr_append pd failed\n", __func__);
goto end;
}
else if (html_node_set_value(progress, pd.str))
{
fprintf(stderr, "%s: html_node_set_value progress failed\n", __func__);
goto end;
}
else if (dynstr_append(&d, "File quota: "))
{
fprintf(stderr, "%s: dynstr_append failed\n", __func__);
goto end;
}
else if (html_serialize(progress, &d))
{
fprintf(stderr, "%s: html_serialize failed\n", __func__);
goto end;
}
else if (dynstr_append(&d, "%s", pd.str))
{
fprintf(stderr, "%s: dynstr_append failed\n", __func__);
goto end;
}
else if (html_node_set_value_unescaped(label, d.str))
{
fprintf(stderr, "%s: html_node_set_value_unescaped label failed\n",
__func__);
goto end;
}
ret = 0;
end:
html_node_free(progress);
dynstr_free(&d);
dynstr_free(&pd);
return ret;
}
static int prepare_logout_form(struct html_node *const n)
{
struct html_node *div, *form, *input;
if (!(div = html_node_add_child(n, "div")))
{
fprintf(stderr, "%s: html_node_add_child div failed\n", __func__);
return -1;
}
else if (!(form = html_node_add_child(div, "form")))
{
fprintf(stderr, "%s: html_node_add_child form failed\n", __func__);
return -1;
}
else if (!(input = html_node_add_child(form, "input")))
{
fprintf(stderr, "%s: html_node_add_child input failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "method", "post"))
{
fprintf(stderr, "%s: html_node_add_attr method failed\n", __func__);
return -1;
}
else if (html_node_add_attr(form, "action", "/logout"))
{
fprintf(stderr, "%s: html_node_add_attr action failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "type", "submit"))
{
fprintf(stderr, "%s: html_node_add_attr type failed\n", __func__);
return -1;
}
else if (html_node_add_attr(input, "value", "Logout"))
{
fprintf(stderr, "%s: html_node_add_attr value failed\n", __func__);
return -1;
}
return 0;
}
static int prepare_footer(struct html_node *const n)
{
int ret = -1;
struct html_node *footer, *const a = html_node_alloc("a");
struct dynstr d;
dynstr_init(&d);
if (!a)
{
fprintf(stderr, "%s: html_node_alloc failed\n", __func__);
goto end;
}
else if (!(footer = html_node_add_child(n, "footer")))
{
fprintf(stderr, "%s: html_node_add_child footer failed\n", __func__);
goto end;
}
else if (html_node_add_attr(a, "href", PROJECT_URL))
{
fprintf(stderr, "%s: html_node_add_attr failed\n", __func__);
goto end;
}
else if (html_node_set_value(a, PROJECT_NAME))
{
fprintf(stderr, "%s: html_node_set_value a failed\n", __func__);
goto end;
}
else if (dynstr_append(&d, "Powered by "))
{
fprintf(stderr, "%s: dynstr_append failed\n", __func__);
goto end;
}
else if (html_serialize(a, &d))
{
fprintf(stderr, "%s: html_serialize failed\n", __func__);
goto end;
}
else if (html_node_set_value_unescaped(footer, d.str))
{
fprintf(stderr, "%s: html_node_add_child a failed\n", __func__);
goto end;
}
ret = 0;
end:
dynstr_free(&d);
html_node_free(a);
return ret;
}
static int list_dir(struct http_response *const r, const char *const dir,
const char *const root, const char *const res,
const struct page_quota *const q)
{
int ret = -1;
DIR *const d = opendir(res);
struct html_node *const html = html_node_alloc("html"),
*head, *title, *body, *charset, *viewport, *table;
struct dynstr out, t;
const char *const fdir = dir + strlen("/user");
dynstr_init(&out);
dynstr_init(&t);
if (!d)
{
fprintf(stderr, "%s: opendir(2): %s\n", __func__, strerror(errno));
goto end;
}
else if (!html)
{
fprintf(stderr, "%s: html_node_alloc_failed\n", __func__);
goto end;
}
else if (!(head = html_node_add_child(html, "head")))
{
fprintf(stderr, "%s: html_node_add_child head failed\n", __func__);
goto end;
}
else if (!(body = html_node_add_child(html, "body")))
{
fprintf(stderr, "%s: html_node_add_child body failed\n", __func__);
goto end;
}
else if (!(table = html_node_add_child(body, "table")))
{
fprintf(stderr, "%s: html_node_add_child table failed\n", __func__);
goto end;
}
else if (!(title = html_node_add_child(head, "title")))
{
fprintf(stderr, "%s: html_node_add_child title failed\n", __func__);
goto end;
}
else if (!(charset = html_node_add_child(head, "meta")))
{
fprintf(stderr, "%s: html_node_add_child charset failed\n", __func__);
goto end;
}
else if (html_node_add_attr(charset, "charset", "UTF-8"))
{
fprintf(stderr, "%s: html_node_add_attr charset failed\n", __func__);
goto end;
}
else if (dynstr_append(&t, PROJECT_NAME " - %s", fdir))
{
fprintf(stderr, "%s: dynstr_append title failed\n", __func__);
goto end;
}
else if (html_node_set_value(title, t.str))
{
fprintf(stderr, "%s: html_node_set_value title failed\n", __func__);
goto end;
}
else if (!(viewport = html_node_add_child(head, "meta")))
{
fprintf(stderr, "%s: html_node_add_child viewport failed\n", __func__);
goto end;
}
else if (html_node_add_attr(viewport, "name", "viewport"))
{
fprintf(stderr, "%s: html_node_add_attr name viewport failed\n",
__func__);
goto end;
}
else if (html_node_add_attr(viewport, "content",
"width=device-width, initial-scale=1, maximum-scale=1"))
{
fprintf(stderr, "%s: html_node_add_attr name viewport failed\n",
__func__);
goto end;
}
else if (prepare_upload_form(body, fdir))
{
fprintf(stderr, "%s: prepare_upload_form failed\n", __func__);
goto end;
}
else if (prepare_mkdir_form(body, fdir))
{
fprintf(stderr, "%s: prepare_upload_form failed\n", __func__);
goto end;
}
else if (q && prepare_quota_form(body, q))
{
fprintf(stderr, "%s: prepare_quota_form failed\n", __func__);
goto end;
}
else if (prepare_logout_form(body))
{
fprintf(stderr, "%s: prepare_logout_form failed\n", __func__);
goto end;
}
else if (prepare_footer(body))
{
fprintf(stderr, "%s: prepare_footer failed\n", __func__);
goto end;
}
struct dirent *de;
while ((de = readdir(d)))
{
const char *const name = de->d_name;
if (!strcmp(name, ".")
|| (!strcmp(name, "..") && !strcmp(root, res)))
continue;
else if (add_element(table, dir, res, name))
{
fprintf(stderr, "%s: add_element failed\n", __func__);
goto end;
}
}
if (dynstr_append(&out, DOCTYPE_TAG))
{
fprintf(stderr, "%s: dynstr_prepend failed\n", __func__);
goto end;
}
else if (html_serialize(html, &out))
{
fprintf(stderr, "%s: html_serialize failed\n", __func__);
goto end;
}
*r = (const struct http_response)
{
.status = HTTP_STATUS_OK,
.buf.rw = out.str,
.n = out.len,
.free = free
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
goto end;
}
ret = 0;
end:
html_node_free(html);
dynstr_free(&t);
if (ret)
dynstr_free(&out);
if (closedir(d))
{
fprintf(stderr, "%s: closedir(2): %s\n", __func__, strerror(errno));
return -1;
}
return ret;
}
static int serve_file(struct http_response *const r,
const struct stat *const sb, const char *const res)
{
FILE *const f = fopen(res, "rb");
if (!f)
{
fprintf(stderr, "%s: fopen(3): %s\n", __func__, strerror(errno));
return -1;
}
*r = (const struct http_response)
{
.status = HTTP_STATUS_OK,
.f = f,
.n = sb->st_size
};
return 0;
}
int page_resource(struct http_response *const r, const char *const dir,
const char *const root, const char *const res,
const struct page_quota *const q)
{
struct stat sb;
if (stat(res, &sb))
{
fprintf(stderr, "%s: stat(2) %s: %s\n",
__func__, res, strerror(errno));
if (errno == ENOENT)
{
*r = (const struct http_response)
{
.status = HTTP_STATUS_NOT_FOUND
};
return 0;
}
else
return -1;
}
const mode_t m = sb.st_mode;
if (S_ISDIR(m))
return list_dir(r, dir, root, res, q);
else if (S_ISREG(m))
return serve_file(r, &sb, res);
fprintf(stderr, "%s: unexpected st_mode %jd\n", __func__, (intmax_t)m);
return -1;
}
int page_failed_login(struct http_response *const r)
{
static const char index[] =
DOCTYPE_TAG
"\n"
" \n"
" " LOGIN_HEAD "\n"
" " STYLE_A "\n"
" \n"
" Invalid username or password.
\n"
LOGIN_BODY
"\n";
*r = (const struct http_response)
{
.status = HTTP_STATUS_UNAUTHORIZED,
.buf.ro = index,
.n = sizeof index - 1
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
return -1;
}
return 0;
}
int page_login(struct http_response *const r)
{
static const char index[] =
DOCTYPE_TAG
"\n"
" \n"
" " STYLE_A "\n"
" " LOGIN_HEAD "\n"
" \n"
" " LOGIN_BODY "\n"
"\n";
*r = (const struct http_response)
{
.status = HTTP_STATUS_OK,
.buf.ro = index,
.n = sizeof index - 1
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
return -1;
}
return 0;
}
int page_forbidden(struct http_response *const r)
{
static const char body[] =
DOCTYPE_TAG
"\n"
"Forbidden\n"
"";
*r = (const struct http_response)
{
.status = HTTP_STATUS_FORBIDDEN,
.buf.ro = body,
.n = sizeof body - 1
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
return -1;
}
return 0;
}
int page_bad_request(struct http_response *const r)
{
static const char body[] =
DOCTYPE_TAG
"\n"
" "
" " PROJECT_TITLE "\n"
" "
"Invalid request\n"
"";
*r = (const struct http_response)
{
.status = HTTP_STATUS_BAD_REQUEST,
.buf.ro = body,
.n = sizeof body - 1
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
return -1;
}
return 0;
}
int page_style(struct http_response *const r)
{
static const char body[] =
"body"
"{\n"
" display: flex;\n"
" flex-direction: column;\n"
"}\n"
".form-control\n"
"{\n"
" display: block;\n"
" border: 1px solid;\n"
" width: 60%;\n"
" border-radius: 8px;\n"
" align-content: center;\n"
"}\n";
*r = (const struct http_response)
{
.status = HTTP_STATUS_OK,
.buf.ro = body,
.n = sizeof body - 1
};
if (http_response_add_header(r, "Content-Type", "text/css"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
return -1;
}
return 0;
}