From 5de4fd071e9f2702ffaa695b72f50dc06c1d1e4c Mon Sep 17 00:00:00 2001
From: Nick Krichevsky <nick@ollien.com>
Date: Sat, 8 Sep 2018 23:53:54 -0400
Subject: [PATCH] Implement parse_request_line

---
 server/request_handling.c | 50 +++++++++++++++++++++++++++++++++++++++
 server/request_handling.h | 12 ++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 server/request_handling.h

diff --git a/server/request_handling.c b/server/request_handling.c
index 9ecc96e..b9ef99e 100644
--- a/server/request_handling.c
+++ b/server/request_handling.c
@@ -1,4 +1,6 @@
+#include "request_handling.h"
 #include <stdlib.h>
+#include <string.h>
 
 /**
  * Identical to strcpy, but strips a trailing '\r\n'
@@ -28,3 +30,51 @@ static char *strcpy_no_crlf(char *dest, const char *src) {
 
     return dest;
 }
+
+/**
+ * Parse a request line into a request_line
+ *
+ * @param line The line to parse.
+ * @param parsed_line A pointer to a request_line. Values must be freed by caller.
+ *
+ * @return -1 if malformed, 0 if well formed.
+ */
+int parse_request_line(const char *line, struct request_line *parsed_line) {
+    int line_size = strlen(line) + 1;
+    char *raw_line = malloc(line_size * sizeof(char));
+    strcpy(raw_line, line);
+
+    char *method = strtok(raw_line, " ");
+    if (method == NULL) {
+        free(raw_line);
+        return -1;
+    }
+    int method_size = strlen(method) + 1;
+    parsed_line->method = malloc(method_size * sizeof(char));
+    strcpy_no_crlf(parsed_line->method, method);
+
+    char *uri = strtok(NULL, " ");
+    if (uri == NULL) {
+        free(raw_line);
+        free(parsed_line->method);
+        return -1;
+    }
+    int uri_size = strlen(uri) + 1;
+    parsed_line->uri = malloc(uri_size * sizeof(char));
+    strcpy_no_crlf(parsed_line->uri, uri);
+
+    char *http_version = strtok(NULL, " ");
+    if (http_version == NULL) {
+        free(raw_line);
+        free(parsed_line->method);
+        free(parsed_line->uri);
+        return -1;
+    }
+    int version_size = strlen(http_version) + 1;
+    parsed_line->http_version = malloc(version_size * sizeof(char));
+    strcpy_no_crlf(parsed_line->http_version, http_version);
+
+    free(raw_line);
+
+    return 0;
+}
diff --git a/server/request_handling.h b/server/request_handling.h
new file mode 100644
index 0000000..9032bbf
--- /dev/null
+++ b/server/request_handling.h
@@ -0,0 +1,12 @@
+#ifndef REQUEST_HANDLING_H
+#define REQUEST_HANDLING_H
+
+struct request_line {
+    char *http_version;
+    char *method;
+    char *uri;
+};
+
+int parse_request_line(const char *line, struct request_line *parsed_line);
+
+#endif