1 files changed, 82 insertions, 0 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..3790332
--- /dev/null
+++ b/main.c
@@ -0,0 +1,82 @@
+#include <fcgi_stdio.h>
+#include <cmark.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+static void print_error(const char *error, ...) {
+    printf("Status: 500 Internal Server Error\r\n"
+           "Content-Type: text/html\r\n"
+           "\r\n"
+           "<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 />");
+    va_list args;
+    va_start(args, error);
+    vprintf(error, args);
+    va_end(args);
+    printf("</p>"
+           "</body>");
+}
+
+int main() {
+    while (FCGI_Accept() >= 0) {
+        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");
+            goto end;
+        }
+        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");
+            goto end;
+        }
+        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));
+            goto end;
+        }
+        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\nContent-Type: text/plain\r\n\r\n");
+                free(uri);
+                goto end;
+            }
+            print_error("Cannot open file %s: %s\n", uri, strerror(r));
+            free(uri);
+            goto end;
+        }
+        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_markdown_to_html(buffer, strlen(buffer), 0);
+        cmark_node_free(document);
+        printf("Content-Type: text/html\r\n\r\n%s", html);
+        free(html);
+        fclose(file);
+        goto end;
+        end:
+        continue;
+    }
+    return 0;
+}