refactor(web): some small refactors

src/util/stream.v

@@ -6,7 +6,7 @@ import os
 
 // reader_to_writer tries to consume the entire reader & write it to the writer.
 pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ! {
-	mut buf := []u8{len: 10 * 1024}
+	mut buf := []u8{len: 8192}
 
 	for {
 		bytes_read := reader.read(mut buf) or { break }
@@ -27,7 +27,7 @@ pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ! {
 		file.close()
 	}
 
-	mut buf := []u8{len: reader_buf_size}
+	mut buf := []u8{len: 8192}
 	mut bytes_left := length
 
 	// Repeat as long as the stream still has data
@@ -47,49 +47,3 @@ pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ! {
 		}
 	}
 }
-
-// match_array_in_array<T> returns how many elements of a2 overlap with a1. For
-// example, if a1 = "abcd" & a2 = "cd", the result will be 2. If the match is
-// not at the end of a1, the result is 0.
-pub fn match_array_in_array<T>(a1 []T, a2 []T) int {
-	mut i := 0
-	mut match_len := 0
-
-	for i + match_len < a1.len {
-		if a1[i + match_len] == a2[match_len] {
-			match_len += 1
-		} else {
-			i += match_len + 1
-			match_len = 0
-		}
-	}
-
-	return match_len
-}
-
-// read_until_separator consumes an io.Reader until it encounters some
-// separator array. The data read is stored inside the provided res array.
-pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ! {
-	mut buf := []u8{len: sep.len}
-
-	for {
-		c := reader.read(mut buf)!
-		res << buf[..c]
-
-		match_len := match_array_in_array(buf[..c], sep)
-
-		if match_len == sep.len {
-			break
-		}
-
-		if match_len > 0 {
-			match_left := sep.len - match_len
-			c2 := reader.read(mut buf[..match_left])!
-			res << buf[..c2]
-
-			if buf[..c2] == sep[match_len..] {
-				break
-			}
-		}
-	}
-}

src/util/util.v

@@ -3,10 +3,7 @@ module util
 import os
 import crypto.sha256
 
-const (
-	reader_buf_size = 1_000_000
-	prefixes        = ['B', 'KB', 'MB', 'GB']
-)
+const prefixes = ['B', 'KB', 'MB', 'GB']
 
 // Dummy struct to work around the fact that you can only share structs, maps &
 // arrays
@@ -24,18 +21,13 @@ pub fn exit_with_message(code int, msg string) {
 
 // hash_file returns the sha256 hash of a given file
 pub fn hash_file(path &string) !string {
-	file := os.open(path) or { return error('Failed to open file.') }
+	file := os.open(path)!
 
 	mut sha256sum := sha256.new()
+	mut buf := []u8{len: 8192}
 
-	buf_size := int(1_000_000)
-	mut buf := []u8{len: buf_size}
-	mut bytes_left := os.file_size(path)
-
-	for bytes_left > 0 {
-		// TODO check if just breaking here is safe
-		bytes_read := file.read(mut buf) or { return error('Failed to read from file.') }
-		bytes_left -= u64(bytes_read)
+	for !file.eof() {
+		bytes_read := file.read(mut buf)!
 
 		// This function never actually fails, but returns an option to follow
 		// the Writer interface.

src/web/web.v

@@ -75,7 +75,7 @@ fn (mut ctx Context) send_string(s string) ! {
 // to the TCP connection socket. Internally, a 10KB buffer is used, to avoid
 // having to store all bytes in memory at once.
 fn (mut ctx Context) send_reader(mut reader io.Reader, size u64) ! {
-	mut buf := []u8{len: 10_000}
+	mut buf := []u8{len: 8192}
 	mut bytes_left := size
 
 	// Repeat as long as the stream still has data
@@ -156,15 +156,11 @@ pub fn (mut ctx Context) json<T>(status http.Status, j T) Result {
 	return Result{}
 }
 
-// file Response HTTP_OK with file as payload
-// This function manually implements responses because it needs to stream the file contents
+// File serves the given file path by streaming its content to the client.
 pub fn (mut ctx Context) file(f_path string) Result {
 	// If the file doesn't exist, just respond with a 404
 	if !os.is_file(f_path) {
-		ctx.status = .not_found
-		ctx.send()
-
-		return Result{}
+		return ctx.status(.not_found)
 	}
 
 	ctx.header.add(.accept_ranges, 'bytes')
@@ -180,9 +176,11 @@ pub fn (mut ctx Context) file(f_path string) Result {
 	}
 
 	mut file := os.open(f_path) or {
-		eprintln(err.msg())
-		ctx.server_error(500)
-		return Result{}
+		lock ctx.logger {
+			ctx.logger.error('Error in file(): $err.msg()')
+		}
+
+		return ctx.status(.internal_server_error)
 	}
 
 	defer {
@@ -217,8 +215,11 @@ pub fn (mut ctx Context) file(f_path string) Result {
 
 		// Move cursor to start of data to read
 		file.seek(start, .start) or {
-			ctx.server_error(500)
-			return Result{}
+			lock ctx.logger {
+				ctx.logger.error('Error in file(): $err.msg()')
+			}
+
+			return ctx.status(.internal_server_error)
 		}
 
 		length := end - u64(start) + 1
@@ -242,13 +243,6 @@ pub fn (mut ctx Context) status(status http.Status) Result {
 	return Result{}
 }
 
-// server_error Response a server error
-pub fn (mut ctx Context) server_error(ecode int) Result {
-	ctx.send_custom_response(http_500) or {}
-
-	return Result{}
-}
-
 // redirect Redirect to an url
 pub fn (mut ctx Context) redirect(url string) Result {
 	mut resp := http_302
@@ -335,8 +329,11 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T, routes map[string]Route) {
 	head := http.parse_request_head(mut reader) or {
 		// Prevents errors from being thrown when BufferedReader is empty
 		if '$err' != 'none' {
-			eprintln('error parsing request head: $err')
+			lock app.logger {
+				app.logger.error('error parsing request head: $err')
+			}
 		}
+
 		return
 	}
 
@@ -357,7 +354,10 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T, routes map[string]Route) {
 
 	// URL Parse
 	url := urllib.parse(head.url) or {
-		eprintln('error parsing path: $err')
+		lock app.logger {
+			app.logger.error('error parsing path: $err')
+		}
+
 		return
 	}