542 lines
13 KiB
V
542 lines
13 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module vweb
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import os
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import net
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import net.http
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import net.urllib
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import strings
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import time
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pub const (
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methods_with_form = ['POST', 'PUT', 'PATCH']
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method_all = ['GET','POST','PUT','PATCH','DELETE']
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header_server = 'Server: VWeb\r\n'
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header_connection_close = 'Connection: close\r\n'
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headers_close = '${header_server}${header_connection_close}\r\n'
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http_404 = 'HTTP/1.1 404 Not Found\r\nContent-Type: text/plain\r\n${headers_close}404 Not Found'
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http_500 = 'HTTP/1.1 500 Internal Server Error\r\nContent-Type: text/plain\r\n${headers_close}500 Internal Server Error'
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mime_types = {
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'.css': 'text/css; charset=utf-8',
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'.gif': 'image/gif',
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'.htm': 'text/html; charset=utf-8',
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'.html': 'text/html; charset=utf-8',
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'.jpg': 'image/jpeg',
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'.js': 'application/javascript',
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'.md': 'text/markdown; charset=utf-8',
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'.pdf': 'application/pdf',
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'.png': 'image/png',
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'.svg': 'image/svg+xml',
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'.txt': 'text/plain; charset=utf-8',
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'.wasm': 'application/wasm',
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'.xml': 'text/xml; charset=utf-8'
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}
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max_http_post_size = 1024 * 1024
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default_port = 8080
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)
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pub struct Context {
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mut:
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static_files map[string]string
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static_mime_types map[string]string
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content_type string = 'text/plain'
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pub:
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req http.Request
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conn net.Socket
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// TODO Response
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pub mut:
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form map[string]string
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headers string // response headers
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done bool
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page_gen_start i64
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}
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pub struct Cookie {
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name string
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value string
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exprires time.Time
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secure bool
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http_only bool
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}
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pub struct Result {}
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fn (mut ctx Context) send_response_to_client(mimetype string, res string) bool {
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if ctx.done { return false }
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ctx.done = true
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mut sb := strings.new_builder(1024)
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defer { sb.free() }
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sb.write('HTTP/1.1 200 OK\r\nContent-Type: ') sb.write(mimetype)
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sb.write('\r\nContent-Length: ') sb.write(res.len.str())
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sb.write(ctx.headers)
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sb.write('\r\n')
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sb.write(headers_close)
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sb.write(res)
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s := sb.str()
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defer {
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s.free()
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}
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ctx.conn.send_string(s) or { return false }
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return true
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}
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pub fn (mut ctx Context) html(s string) {
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ctx.send_response_to_client('text/html', s)
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}
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pub fn (mut ctx Context) text(s string) Result {
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ctx.send_response_to_client('text/plain', s)
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return Result{}
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}
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pub fn (mut ctx Context) json(s string) Result {
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ctx.send_response_to_client('application/json', s)
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return Result{}
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}
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pub fn (mut ctx Context) ok(s string) Result {
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ctx.send_response_to_client(ctx.content_type, s)
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return Result{}
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}
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pub fn (mut ctx Context) redirect(url string) Result {
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if ctx.done { return Result{} }
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ctx.done = true
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ctx.conn.send_string('HTTP/1.1 302 Found\r\nLocation: ${url}${ctx.headers}\r\n${headers_close}') or { return Result{} }
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return Result{}
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}
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pub fn (mut ctx Context) not_found() Result {
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if ctx.done { return vweb.Result{} }
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ctx.done = true
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ctx.conn.send_string(http_404) or {}
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return vweb.Result{}
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}
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pub fn (mut ctx Context) set_cookie(cookie Cookie) {
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secure := if cookie.secure { "Secure;" } else { "" }
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http_only := if cookie.http_only { "HttpOnly" } else { "" }
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ctx.add_header('Set-Cookie', '$cookie.name=$cookie.value; $secure $http_only')
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}
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pub fn (mut ctx Context) set_cookie_old(key, val string) {
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// TODO support directives, escape cookie value (https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie)
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//println('Set-Cookie $key=$val')
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//ctx.add_header('Set-Cookie', '${key}=${val}; Secure; HttpOnly')
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ctx.add_header('Set-Cookie', '${key}=${val}; HttpOnly')
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}
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pub fn (mut ctx Context) set_content_type(typ string) {
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ctx.content_type = typ
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}
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pub fn (mut ctx Context) set_cookie_with_expire_date(key, val string, expire_date time.Time) {
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ctx.add_header('Set-Cookie', '$key=$val; Secure; HttpOnly; expires=${expire_date.utc_string()}')
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}
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pub fn (ctx &Context) get_cookie(key string) ?string { // TODO refactor
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mut cookie_header := ctx.get_header('cookie')
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if cookie_header == '' {
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cookie_header = ctx.get_header('Cookie')
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}
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cookie_header = ' ' + cookie_header
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//println('cookie_header="$cookie_header"')
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//println(ctx.req.headers)
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cookie := if cookie_header.contains(';') {
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cookie_header.find_between(' $key=', ';')
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} else {
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cookie_header.find_between(' $key=', '\r')
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}
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if cookie != '' {
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return cookie.trim_space()
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}
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return error('Cookie not found')
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}
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pub fn (mut ctx Context) add_header(key, val string) {
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//println('add_header($key, $val)')
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ctx.headers = ctx.headers + '\r\n$key: $val'
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//println(ctx.headers)
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}
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pub fn (ctx &Context) get_header(key string) string {
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return ctx.req.headers[key]
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}
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//fn handle_conn(conn net.Socket) {
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//println('handle')
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//}
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pub fn run<T>(port int) {
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mut app := T{}
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run_app<T>(mut app, port)
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}
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pub fn run_app<T>(mut app T, port int) {
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println('Running a Vweb app on http://localhost:$port')
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l := net.listen(port) or { panic('failed to listen') }
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app.vweb = Context{}
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app.init_once()
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//app.reset()
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for {
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conn := l.accept() or { panic('accept() failed') }
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//handle_conn<T>(conn, mut app)
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handle_conn<T>(conn, mut app)
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//app.vweb.page_gen_time = time.ticks() - t
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//eprintln('handle conn() took ${time.ticks()-t}ms')
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//message := readall(conn)
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//println(message)
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/*
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if message.len > max_http_post_size {
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println('message.len = $message.len > max_http_post_size')
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conn.send_string(http_500) or {}
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conn.close() or {}
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continue
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}
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*/
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//lines := message.split_into_lines()
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//println(lines)
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/*
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if lines.len < 2 {
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conn.send_string(http_500) or {}
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conn.close() or {}
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continue
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}
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*/
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}
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}
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fn handle_conn<T>(conn net.Socket, mut app T) {
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//fn handle_conn<T>(conn net.Socket, app_ T) T {
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//mut app := app_
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//first_line := strip(lines[0])
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page_gen_start := time.ticks()
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first_line := conn.read_line()
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$if debug {
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println('firstline="$first_line"')
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}
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// Parse the first line
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// "GET / HTTP/1.1"
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//first_line := s.all_before('\n')
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vals := first_line.split(' ')
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if vals.len < 2 {
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println('no vals for http')
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conn.send_string(http_500) or {}
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conn.close() or {}
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return
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//continue
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}
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mut headers := []string{}
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mut body := ''
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mut in_headers := true
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mut len := 0
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mut body_len := 0
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//for line in lines[1..] {
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for _ in 0..100 {
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//println(j)
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line := conn.read_line()
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sline := strip(line)
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if sline == '' {
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//if in_headers {
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// End of headers, no body => exit
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if len == 0 {
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break
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}
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//} //else {
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// End of body
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//break
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//}
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in_headers = false
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}
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if in_headers {
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//println(sline)
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headers << sline
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if sline.starts_with('Content-Length') {
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len = sline.all_after(': ').int()
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//println('GOT CL=$len')
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}
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} else {
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body += sline + '\r\n'
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body_len += body.len
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if body_len >= len {
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break
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}
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//println('body:$body')
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}
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}
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req := http.Request{
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headers: http.parse_headers(headers) //s.split_into_lines())
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data: strip(body)
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ws_func: 0
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user_ptr: 0
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method: vals[0]
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url: vals[1]
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}
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$if debug {
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println('req.headers = ')
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println(req.headers)
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println('req.data="$req.data"' )
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//println('vweb action = "$action"')
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}
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//mut app := T{
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app.vweb = Context{
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req: req
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conn: conn
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form: map[string]string
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static_files: app.vweb.static_files
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static_mime_types: app.vweb.static_mime_types
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page_gen_start: page_gen_start
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}
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//}
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if req.method in methods_with_form {
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app.vweb.parse_form(req.data)
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}
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if vals.len < 2 {
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$if debug {
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println('no vals for http')
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}
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conn.close() or {}
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return
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//continue
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}
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// Serve a static file if it is one
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// TODO: handle url parameters properly - for now, ignore them
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mut static_file_name := app.vweb.req.url
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if static_file_name.contains('?') {
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static_file_name = static_file_name.all_before('?')
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}
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static_file := app.vweb.static_files[static_file_name]
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mime_type := app.vweb.static_mime_types[static_file_name]
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if static_file != '' && mime_type != '' {
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data := os.read_file(static_file) or {
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conn.send_string(http_404) or {}
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return
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}
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app.vweb.send_response_to_client(mime_type, data)
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data.free()
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return
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}
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app.init()
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// Call the right action
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println('route matching...')
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t := time.ticks()
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mut action := ''
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mut route_words := []string{}
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mut ok := true
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url_words := vals[1][1..].split('/')
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mut vars := []string{cap: route_words.len}
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$for method in T {
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ok = true
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println('\n\n method = $method urlwords=')
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println(url_words)
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println('attrs=$attrs')
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if attrs == '' {
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// No routing for this method. If it matches, call it and finish matching
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// since such methods have a priority.
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// For example URL `/register` matches route `/:user`, but `fn register()`
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// should be called first.
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if url_words.len == 0 {
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app.index()
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conn.close() or {}
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return
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}
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println('no attrs for ${url_words[0]}')
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if url_words[0] == method {
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println('easy match $method')
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vars = []
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app.$method(vars)
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conn.close() or {}
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return
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}
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}
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else {
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//println('ATTR=$attrs')
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route_words = attrs[1..].split('/')
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//println('words:') println(route_words)
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//println('vals:') println(url_words)
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vars = []string{cap: route_words.len}
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if route_words.len <= url_words.len {
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// match `/:user/:repo/tree` to `/vlang/v/tree`
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for i, word in route_words {
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if word.starts_with(':') {
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// remember and skip the var
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vars << url_words[i]
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continue
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}
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if word != url_words[i] {
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ok = false
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break
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}
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}
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if ok {
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//goto end // TODO break in $for
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if !route_words[0].starts_with(':') {
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// Routes without variables have higher priority, so call it right now
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// e.g. `/register` matches `['/:user']`, but `['/register']` should be called first.
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//println('OK not var $action="$action"')
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app.$method(vars)
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conn.close() or {}
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return
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}
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action = method
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println('setting action to $method')
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}
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}
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}
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}
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if action == '' {
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conn.send_string(http_404) or {}
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}
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//end:
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// No route matched, just do a simple `/home` => `action=home`
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if action == '' {
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//println('action is empty because no routes were matched...')
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action = vals[1][1..].all_before('/')
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if action.contains('?') {
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action = action.all_before('?')
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}
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if action == '' {
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action = 'index'
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}
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}
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$if debug {
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println('action=$action')
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}
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println('route matching took ${time.ticks() - t}ms')
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app.$action()
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/*
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app.$action() or {
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conn.send_string(http_404) or {}
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}
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*/
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conn.close() or {}
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//app.reset()
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return
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}
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fn (mut ctx Context) parse_form(s string) {
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if ctx.req.method !in methods_with_form {
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return
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}
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//pos := s.index('\r\n\r\n')
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//if pos > -1 {
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mut str_form := s//[pos..s.len]
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str_form = str_form.replace('+', ' ')
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words := str_form.split('&')
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for word in words {
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$if debug {
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println('parse form keyval="$word"')
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}
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keyval := word.trim_space().split('=')
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if keyval.len != 2 { continue }
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key := keyval[0]
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val := urllib.query_unescape(keyval[1]) or {
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continue
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}
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$if debug {
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println('http form "$key" => "$val"')
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}
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ctx.form[key] = val
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}
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//}
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// todo: parse form-data and application/json
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// ...
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}
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fn (mut ctx Context) scan_static_directory(directory_path, mount_path string) {
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files := os.ls(directory_path) or { panic(err) }
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if files.len > 0 {
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for file in files {
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if os.is_dir(file) {
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ctx.scan_static_directory(directory_path + '/' + file, mount_path + '/' + file)
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} else if file.contains('.') && ! file.starts_with('.') && ! file.ends_with('.') {
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ext := os.file_ext(file)
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// Rudimentary guard against adding files not in mime_types.
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// Use serve_static directly to add non-standard mime types.
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if ext in mime_types {
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ctx.serve_static(mount_path + '/' + file, directory_path + '/' + file, mime_types[ext])
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}
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}
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}
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}
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}
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pub fn (mut ctx Context) handle_static(directory_path string) bool {
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if ctx.done || ! os.exists(directory_path) {
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return false
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}
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dir_path := directory_path.trim_space().trim_right('/')
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mut mount_path := ''
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if dir_path != '.' && os.is_dir(dir_path) {
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// Mount point hygene, "./assets" => "/assets".
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mount_path = '/' + dir_path.trim_left('.').trim('/')
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}
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ctx.scan_static_directory(dir_path, mount_path)
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return true
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}
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pub fn (mut ctx Context) serve_static(url, file_path, mime_type string) {
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ctx.static_files[url] = file_path
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ctx.static_mime_types[url] = mime_type
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}
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/*
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fn readall(conn net.Socket) string {
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// read all message from socket
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//printf("waitall=%d\n", C.MSG_WAITALL)
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mut message := ''
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buf := [1024]byte
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for {
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n := C.recv(conn.sockfd, buf, 1024, 0)
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m := conn.crecv(buf, 1024)
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message += string( byteptr(buf), m )
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if message.len > max_http_post_size { break }
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if n == m { break }
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}
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return message
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}
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*/
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fn strip(s string) string {
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// strip('\nabc\r\n') => 'abc'
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return s.trim('\r\n')
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}
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pub fn not_found() Result {
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return Result{}
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}
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fn filter(s string) string {
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return s.replace_each([
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'<', '<',
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'"', '"',
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'&', '&',
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])
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}
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pub type RawHtml = string
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