refactor: ran vfmt with new defaults

feat(docker): started work on new implementation

src/docker/containers.v

@@ -3,17 +3,22 @@ module docker
 import json
 import net.urllib
 import time
+import net.http
 
 struct Container {
 	id    string   [json: Id]
 	names []string [json: Names]
 }
 
-// containers returns a list of all currently running containers
-pub fn containers() ?[]Container {
-	res := request('GET', urllib.parse('/v1.41/containers/json') ?) ?
+pub fn (mut d DockerDaemon) containers() ?[]Container {
+	d.send_request('GET', urllib.parse('/v1.41/containers/json')?)?
+	res_header := d.read_response_head()?
+	content_length := res_header.header.get(http.CommonHeader.content_length)?.int()
+	res := d.read_response_body(content_length)?
 
-	return json.decode([]Container, res.text) or {}
+	data := json.decode([]Container, res)?
+
+	return data
 }
 
 pub struct NewContainer {

src/docker/docker.v

@@ -5,16 +5,12 @@ import net.urllib
 import net.http
 import json
 
-const socket = '/var/run/docker.sock'
-
-const buf_len = 1024
-
 // send writes a request to the Docker socket, waits for a response & returns
 // it.
 fn send(req &string) ?http.Response {
 	// Open a connection to the socket
-	mut s := unix.connect_stream(docker.socket) or {
-		return error('Failed to connect to socket ${docker.socket}.')
+	mut s := unix.connect_stream(socket) or {
+		return error('Failed to connect to socket ${socket}.')
 	}
 
 	defer {
@@ -25,19 +21,19 @@ fn send(req &string) ?http.Response {
 	}
 
 	// Write the request to the socket
-	s.write_string(req) or { return error('Failed to write request to socket ${docker.socket}.') }
+	s.write_string(req) or { return error('Failed to write request to socket ${socket}.') }
 
 	s.wait_for_write()?
 
 	mut c := 0
-	mut buf := []u8{len: docker.buf_len}
+	mut buf := []u8{len: buf_len}
 	mut res := []u8{}
 
 	for {
-		c = s.read(mut buf) or { return error('Failed to read data from socket ${docker.socket}.') }
+		c = s.read(mut buf) or { return error('Failed to read data from socket ${socket}.') }
 		res << buf[..c]
 
-		if c < docker.buf_len {
+		if c < buf_len {
 			break
 		}
 	}
@@ -45,7 +41,7 @@ fn send(req &string) ?http.Response {
 	// After reading the first part of the response, we parse it into an HTTP
 	// response. If it isn't chunked, we return early with the data.
 	parsed := http.parse_response(res.bytestr()) or {
-		return error('Failed to parse HTTP response from socket ${docker.socket}.')
+		return error('Failed to parse HTTP response from socket ${socket}.')
 	}
 
 	if parsed.header.get(http.CommonHeader.transfer_encoding) or { '' } != 'chunked' {
@@ -59,12 +55,10 @@ fn send(req &string) ?http.Response {
 		s.wait_for_write()?
 
 		for {
-			c = s.read(mut buf) or {
-				return error('Failed to read data from socket ${docker.socket}.')
-			}
+			c = s.read(mut buf) or { return error('Failed to read data from socket ${socket}.') }
 			res << buf[..c]
 
-			if c < docker.buf_len {
+			if c < buf_len {
 				break
 			}
 		}

src/docker/socket.v

@@ -0,0 +1,102 @@
+module docker
+
+import net.unix
+import io
+import net.http
+import strings
+import net.urllib
+import json
+
+const (
+	socket         = '/var/run/docker.sock'
+	buf_len        = 10 * 1024
+	http_separator = [u8(`\r`), `\n`, `\r`, `\n`]
+)
+
+pub struct DockerDaemon {
+mut:
+	socket &unix.StreamConn
+	reader &io.BufferedReader
+}
+
+pub fn new_conn() ?&DockerDaemon {
+	s := unix.connect_stream(docker.socket)?
+
+	d := &DockerDaemon{
+		socket: s
+		reader: io.new_buffered_reader(reader: s)
+	}
+
+	return d
+}
+
+pub fn (mut d DockerDaemon) send_request(method string, url urllib.URL) ? {
+	req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\n\n'
+
+	d.socket.write_string(req)?
+}
+
+pub fn (mut d DockerDaemon) send_request_with_body(method string, url urllib.URL, content_type string, body string) ? {
+	req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\nContent-Type: $content_type\nContent-Length: $body.len\n\n$body\n\n'
+
+	d.socket.write_string(req)?
+}
+
+pub fn (mut d DockerDaemon) request_with_json<T>(method string, url urllib.URL, data &T) ? {
+	body := json.encode(data)
+
+	return request_with_body(method, url, 'application/json', body)
+}
+
+// read_response_head consumes the socket's contents until it encounters
+// '\r\n\r\n', after which it parses the response as an HTTP response.
+pub fn (mut d DockerDaemon) read_response_head() ?http.Response {
+	mut c := 0
+	mut buf := []u8{len: 4}
+	mut res := []u8{}
+
+	for {
+		c = d.reader.read(mut buf)?
+		res << buf[..c]
+
+		mut i := 0
+		mut match_len := 0
+
+		for i + match_len < c {
+			if buf[i + match_len] == docker.http_separator[match_len] {
+				match_len += 1
+			} else {
+				i += match_len + 1
+				match_len = 0
+			}
+		}
+
+		if match_len == 4 {
+			break
+		} else if match_len > 0 {
+			mut buf2 := []u8{len: 4 - match_len}
+			c2 := d.reader.read(mut buf2)?
+			res << buf2[..c2]
+
+			if buf2 == docker.http_separator[match_len..] {
+				break
+			}
+		}
+	}
+
+	return http.parse_response(res.bytestr())
+}
+
+pub fn (mut d DockerDaemon) read_response_body(length int) ?string {
+	mut buf := []u8{len: docker.buf_len}
+	mut c := 0
+	mut builder := strings.new_builder(docker.buf_len)
+
+	for builder.len < length {
+		c = d.reader.read(mut buf) or { break }
+
+		builder.write(buf[..c])?
+	}
+
+	return builder.str()
+}

src/main.v

@@ -31,7 +31,7 @@ fn main() {
 			logs.cmd(),
 		]
 	}
-
 	app.setup()
 	app.parse(os.args)
+	return
 }