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#include <fcgi_stdio.h>
#include <cmark.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
static void print_error(const char *error, ...) {
char fmt[512];
char buffer[128];
va_list args;
va_start(args, error);
vsprintf(buffer, error, args);
va_end(args);
sprintf(fmt, "<html lang=\"en\">"
"<head>"
"<meta charset=\"utf-8\">"
"<title>Error</title>"
"</head>"
"<body>"
"<p>The server encountered the following error(s) rendering your document:<br />"
"%s"
"</p>"
"</body>",
buffer);
printf("Status: 500 Internal Server Error\r\n"
"Content-Type: text/html\r\n"
"Content-Length: %d\r\n"
"\r\n"
"%s",
strlen(fmt) * sizeof(char),
fmt);
}
static inline void run() {
const char *doc_root = getenv("DOCUMENT_ROOT");
if (doc_root == NULL) {
print_error("%s is not set. Check if you included fastcgi_params in your web server configuration.",
"DOCUMENT_ROOT");
return;
}
const char *doc_uri = getenv("DOCUMENT_URI");
if (doc_uri == NULL) {
print_error("%s is not set. Check if you included fastcgi_params in your web server configuration.",
"DOCUMENT_URI");
return;
}
char *uri = calloc(strlen(doc_root) + 1 /* separator */ + strlen(doc_uri) + 1 /* \0 */,
sizeof(char));
if (uri == NULL) {
int r = errno;
print_error("Cannot allocate memory: %s\n", strerror(r));
return;
}
sprintf(uri, "%s/%s", doc_root, doc_uri);
FILE *file = fopen(uri, "r");
if (file == NULL) {
int r = errno;
if (r == ENOENT) {
printf("Status: 404 Not Found\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: 0\r\n"
"\r\n");
free(uri);
return;
}
print_error("Cannot open file %s: %s\n", uri, strerror(r));
free(uri);
return;
}
free(uri);
cmark_parser *parser = cmark_parser_new(CMARK_OPT_DEFAULT);
ssize_t bytes;
char buffer[1024];
while ((bytes = fread(buffer, 1, sizeof(buffer), file)) > 0) {
cmark_parser_feed(parser, buffer, bytes);
if (bytes < sizeof(buffer)) {
break;
}
}
cmark_node *document = cmark_parser_finish(parser);
cmark_parser_free(parser);
char *html = cmark_render_html(document, CMARK_OPT_DEFAULT);
cmark_node_free(document);
printf("Content-Type: text/html\r\n"
"Content-Length: %d\r\n"
"\r\n"
"<html><head><meta charset=\"utf-8\"></head><body>%s</body></html>",
(strlen("<html><head><meta charset=\"utf-8\"></head><body></body></html>") + strlen(html))
* sizeof(char),
html);
free(html);
fclose(file);
}
int main() {
while (FCGI_Accept() >= 0) {
run();
}
return 0;
}
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