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#include <kore/kore.h>
#include <kore/http.h>
#include <kore/pgsql.h>
#include <kore/seccomp.h>
#include "assets.h"
#include "../lib/md4c/src/entity.h"
#include "../lib/md4c/src/entity.c"
#include "../lib/md4c/src/md4c.h"
#include "../lib/md4c/src/md4c.c"
#include "../lib/md4c/src/md4c-html.h"
#include "../lib/md4c/src/md4c-html.c"
KORE_SECCOMP_FILTER("app",
KORE_SYSCALL_ALLOW(getdents64)
)
int init(int);
int post(struct http_request *);
int posts(struct http_request *);
int render_posts(struct http_request *, const char *);
static void process_md_output(const MD_CHAR *, MD_SIZE size, void *);
static int render_md(char *, struct kore_buf *);
static const char *database = "db";
// Called when this module is loaded (see config)
int
init(int state)
{
// Register the database
int err = kore_pgsql_register(
database,
"host=127.0.0.1 port=5432 user=postgres password=p0stgres dbname=clog sslmode=disable"
);
return err;
}
int
post(struct http_request *req)
{
const char *resource;
resource = req->path + strlen("/posts/");
kore_log(LOG_DEBUG, "Resource /posts/%s", resource);
return render_posts(req, resource);
}
int
posts(struct http_request *req)
{
return render_posts(req, NULL);
}
int
render_posts(struct http_request *req, const char *resource)
{
// Buffer for response
struct kore_buf *resp_buf = kore_buf_alloc(0);
// SQL vars
struct kore_pgsql sql;
int row, rows;
// Post attributes/query results.
char *id, *title, *created_at, *body;
kore_pgsql_init(&sql);
// Initialise our kore_pgsql data structure with the database name
// we want to connect to (note that we registered this earlier with
// kore_pgsql_register()). We also say we will perform a synchronous
// query (KORE_PGSQL_SYNC).
int err = kore_pgsql_setup(&sql, database, KORE_PGSQL_SYNC);
kore_log(LOG_ERR, "kore_pgsql_setup: %d", err);
if (!err)
{
kore_pgsql_logerror(&sql);
goto out;
}
// Start writing HTML.
kore_buf_append(resp_buf, asset_index_begin_html, asset_len_index_begin_html);
// Query for posts, check for error.
if (resource) {
// Query post
err = kore_pgsql_query_params(
&sql,
"SELECT id, title, created_at::DATE, body FROM posts "
"WHERE id = $1 "
"ORDER BY updated_at DESC;",
0,
1,
KORE_PGSQL_PARAM_TEXT(resource)
);
} else {
// Query all posts
err = kore_pgsql_query(
&sql,
"SELECT id, title, created_at::DATE, body FROM posts "
"ORDER BY updated_at DESC;"
);
}
if (!err) {
kore_pgsql_logerror(&sql);
goto out;
}
// Iterate over posts and render them.
rows = kore_pgsql_ntuples(&sql);
for (row = 0; row < rows; row++) {
id = kore_pgsql_getvalue(&sql, row, 0);
title = kore_pgsql_getvalue(&sql, row, 1);
created_at = kore_pgsql_getvalue(&sql, row, 2);
body = kore_pgsql_getvalue(&sql, row, 3);
kore_log(LOG_NOTICE, "id: '%s'; title '%s'", id, title);
// Allocate a buffer to render the markdown as HTML into.
struct kore_buf *html_buf = kore_buf_alloc(0);
// Render MD.
if (!render_md(body, html_buf)) {
kore_log(LOG_ERR, "Error rendering markdown for entry %s.", id);
kore_buf_free(html_buf);
continue;
}
// Append rendered MD post.
kore_buf_appendf(
resp_buf,
(const char *) asset_post_html,
title,
created_at,
kore_buf_stringify(html_buf, NULL)
);
kore_buf_free(html_buf);
}
out: ;
kore_buf_append(resp_buf, asset_index_end_html, asset_len_index_end_html);
http_response_header(req, "content-type", "text/html; charset=utf-8");
http_response(req, HTTP_STATUS_OK, resp_buf->data, resp_buf->offset);
// Cleanup.
kore_pgsql_cleanup(&sql);
kore_buf_free(resp_buf);
return (KORE_RESULT_OK);
}
static int
render_md(char *in, struct kore_buf *out)
{
static unsigned parser_flags = 0;
static unsigned renderer_flags = MD_HTML_FLAG_DEBUG;
int ret = md_html(
in,
(MD_SIZE) strlen(in),
process_md_output,
(void*) out,
parser_flags,
renderer_flags
);
if(ret != 0) {
kore_log(LOG_ERR, "Parsing Markdown failed.\n");
return -1;
}
return 1;
}
static void
process_md_output(const MD_CHAR *html, MD_SIZE size, void *buf)
{
kore_buf_append((struct kore_buf *) buf, (const void *) html, (size_t) size);
}
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