Initial project import

tools/v/vlib/picohttpparser/request.v

@@ -0,0 +1,97 @@
+module picohttpparser
+
+const max_headers = 100
+
+pub struct Header {
+pub mut:
+	name  string
+	value string
+}
+
+pub struct Request {
+mut:
+	prev_len int
+pub mut:
+	method      string
+	path        string
+	headers     [max_headers]Header
+	num_headers int
+	body        string
+}
+
+// Pret contains the nr of bytes read, a negative number indicates an error
+struct Pret {
+pub mut:
+	err string
+	// -1 indicates a parse error and -2 means the request is parsed
+	ret int
+}
+
+// parse_request parses a raw HTTP request and returns the number of bytes read.
+// -1 indicates a parse error and -2 means the request is parsed
+@[inline]
+pub fn (mut r Request) parse_request(s string) !int {
+	mut buf := s.str
+	buf_end := unsafe { s.str + s.len }
+
+	mut pret := Pret{}
+	// if prev_len != 0, check if the request is complete
+	// (a fast countermeasure against slowloris)
+	if r.prev_len != 0 && unsafe { is_complete(buf, buf_end, r.prev_len, mut pret) == nil } {
+		if pret.ret == -1 {
+			return error(pret.err)
+		}
+		return pret.ret
+	}
+
+	buf = r.phr_parse_request(buf, buf_end, mut pret)
+	if pret.ret == -1 {
+		return error(pret.err)
+	}
+
+	if unsafe { buf == nil } {
+		return pret.ret
+	}
+
+	pret.ret = unsafe { buf - s.str }
+
+	r.body = unsafe { (&s.str[pret.ret]).vstring_literal_with_len(s.len - pret.ret) }
+	r.prev_len = s.len
+
+	// return nr of bytes
+	return pret.ret
+}
+
+// parse_request_path sets the `path` and `method` fields
+@[inline]
+pub fn (mut r Request) parse_request_path(s string) !int {
+	mut buf := s.str
+	buf_end := unsafe { s.str + s.len }
+
+	mut pret := Pret{}
+	r.phr_parse_request_path(buf, buf_end, mut pret)
+	if pret.ret == -1 {
+		return error(pret.err)
+	}
+
+	return pret.ret
+}
+
+// parse_request_path_pipeline can parse the `path` and `method` of HTTP/1.1 pipelines.
+// Call it again to parse the next request
+@[inline]
+pub fn (mut r Request) parse_request_path_pipeline(s string) !int {
+	mut buf := unsafe { s.str + r.prev_len }
+	buf_end := unsafe { s.str + s.len }
+
+	mut pret := Pret{}
+	r.phr_parse_request_path_pipeline(buf, buf_end, mut pret)
+	if pret.ret == -1 {
+		return error(pret.err)
+	}
+
+	if pret.ret > 0 {
+		r.prev_len = pret.ret
+	}
+	return pret.ret
+}