move HTTP POST handling to separate file

1 files changed, 75 insertions, 0 deletions

diff --git a/post.c b/post.c
new file mode 100644
index 0000000..b0eed9e
--- /dev/null
+++ b/post.c
@@ -0,0 +1,75 @@
+#define _XOPEN_SOURCE 700
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "blog.h"
+
+#define HSIZE 4 /* username, password, title, body */
+
+void read_post_data(void)
+{
+	char *content_length = getenv("CONTENT_LENGTH");
+	if (!content_length) {
+		return;
+	}
+
+	int cl = atoi(content_length);
+	if (!cl) {
+		return;
+	}
+
+	if (!hcreate(HSIZE)) {
+		return;
+	}
+
+	char *buf = malloc(cl + 1);
+	if (!buf) {
+		return;
+	}
+
+	int pos = 0;
+	int c;
+	while ((c = getchar()) != EOF) {
+		if (c == '&') {
+			char *value = strchr(buf, '=');
+			*value = '\0';
+			value++;
+
+			char *key = strdup(buf);
+			char *data = strdup(value);
+
+			ENTRY e = {
+				.key = key,
+				.data = data
+			};
+			hsearch(e, ENTER);
+			pos = 0;
+		} else if (c == '%') {
+			char hex[3] = { 0, 0, 0 };
+			hex[0] = getchar();
+			hex[1] = getchar();
+			buf[pos] = strtol(hex, NULL, 16);
+			buf[++pos] = '\0';
+		} else {
+			buf[pos] = c;
+			buf[++pos] = '\0';
+		}
+	}
+
+	free(buf);
+}
+
+char *find_post_data(char *key)
+{
+	ENTRY e = {
+		.key = key
+	};
+	ENTRY *p = hsearch(e, FIND);
+	if (p && p->data) {
+		return p->data;
+	}
+
+	return NULL;
+}