From 18ee823f95bd526e52438077f1efa0b3e034105a Mon Sep 17 00:00:00 2001
From: Romain de Laage <romain.delaage@rdelaage.ovh>
Date: Tue, 8 Dec 2020 15:58:50 +0100
Subject: [PATCH] Begin library for gemini requests

---
 gemini.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 gemini.c

diff --git a/gemini.c b/gemini.c
new file mode 100644
index 0000000..260966a
--- /dev/null
+++ b/gemini.c
@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+typedef struct _gemini_request {
+	char request_content[1024];
+	char hostname[256];
+	char scheme[64];
+	char path[1024];
+	char answer_code[2];
+	char answer_meta[2];
+	char answer_content[8192];
+} Request;
+
+Request *examineRequest(const char *request_content)
+{
+	int i = 0, len = 0, len_req = strlen(request_content);
+	Request *request = malloc(sizeof(Request));
+
+	if (request == NULL)
+		return NULL;
+
+	memset(request, 0, sizeof(Request));
+
+	strcpy(request->request_content, request_content);
+
+	/* We are trying to determine the protocol */
+	while (i <= len_req - 3)
+		if (request_content[i] != ':' || request_content[i + 1] != '/' || request_content[i + 2] != '/')
+		{
+			i++;
+			len++;
+		}
+		else
+		{
+			strncpy(request->scheme, request_content + i - len, len);
+			break;
+		}
+	
+	/* If no protocol found error */
+	if (request->scheme[0] == 0)
+	{
+		free(request);
+		return NULL;
+	}
+
+	/* We skip the :// */
+	i += 3;
+	len = 0;
+
+	/* We try to determine hostname + port */
+	while (i < len_req && request_content[i] != '/')
+	{
+		i++;
+		len++;
+	}
+
+	strncpy(request->hostname, request_content + i - len, len);
+
+	/* if no hostname error */
+	if (request->hostname[0] == 0)
+	{
+		free(request);
+		return NULL;
+	}
+
+	/* now fill path in request struct */
+	strncpy(request->path, request_content + i, strlen(request_content) - i);
+
+	/* if path is empty, so path is root */
+	if(request->path[0] == 0)
+		strcpy(request->path, "/");
+
+	return request;
+}
+
+int main(void)
+{
+	Request *request = examineRequest("http://[5f1f:fgeg::1]");
+
+	if (request == NULL)
+	{
+		printf("error during url parsing\n");
+		return 1;
+	}
+
+	printf("Request : %s\nScheme : %s\nHostname : %s\n", request->request_content, request->scheme, request->hostname);
+
+	free(request);
+
+	return 0;
+}