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v/vlib/vweb/vweb.v
2019-08-17 02:55:11 +03:00

251 lines
5.6 KiB
Go

module vweb
import (
os
strings
net
http
net.urllib
)
const (
methods_with_form = ['POST', 'PUT', 'PATCH']
)
struct Context {
static_files map[string]string
static_mime_types map[string]string
pub:
req http.Request
conn net.Socket
form map[string]string
// TODO Response
headers []string // response headers
}
pub fn (ctx Context) text(s string) {
h := ctx.headers.join('\n')
ctx.conn.write('HTTP/1.1 200 OK\nContent-Type: text/plain\n$h\n$s')
}
pub fn (ctx Context) json(s string) {
h := ctx.headers.join('\n')
ctx.conn.write('HTTP/1.1 200 OK\nContent-Type: application/json\n$h\n$s')
}
pub fn (ctx Context) redirect(url string) {
h := ctx.headers.join('\n')
ctx.conn.write('HTTP/1.1 302 Found\nLocation: $url\n$h')
}
pub fn (ctx Context) not_found(s string) {
ctx.conn.write('HTTP/1.1 404 Not Found')
}
pub fn (ctx mut Context) set_cookie(key, val string) {
ctx.set_header('Set-Cookie', '$key=$val')
}
pub fn (ctx Context) get_cookie(key string) string {
for h in ctx.req.headers2 {
if h.starts_with('Cookie:') || h.starts_with('cookie:') {
cookie := h.right(7)
return cookie.find_between(' $key=', ';')
}
}
return ''
/*
cookie := ctx.req.headers['Cookie']
println('get cookie $key : "$cookie"')
return cookie.find_between('$key=', ';')
*/
}
fn (ctx mut Context) set_header(key, val string) {
// ctx.resp.headers[key] = val
ctx.headers << '$key: $val'
}
pub fn (ctx Context) html(html string) {
h := ctx.headers.join('\n')
ctx.conn.write('HTTP/1.1 200 OK\nContent-Type: text/html\n$h\n\n$html')
}
pub fn run<T>(port int) {
println('Running vweb app on http://localhost:$port ...')
l := net.listen(port) or { panic('failed to listen') }
mut app := T{}
app.init()
for {
conn := l.accept() or {
panic('accept() failed')
}
//foobar<T>()
// TODO move this to handle_conn<T>(conn, app)
s := conn.read_line()
if s == '' {
conn.write('HTTP/1.1 500 Not Found \nContent-Type: text/plain \n\n500')
conn.close()
continue
}
// Parse request headers
lines := s.split_into_lines()
mut headers := []string //map[string]string{}
for i, line in lines {
if i == 0 {
continue
}
words := line.split(':')
if words.len != 2 {
continue
}
headers << line
/*
key := words[0]
val := words[1]
headers[key] = val
*/
}
// Parse the first line
// "GET / HTTP/1.1"
first_line := s.all_before('\n')
vals := first_line.split(' ')
mut action := vals[1].right(1).all_before('/')
if action.contains('?') {
action = action.all_before('?')
}
if action == '' {
action = 'index'
}
req := http.Request{
headers: map[string]string
headers2: headers
ws_func: 0
user_ptr: 0
method: vals[0]
url: vals[1]
}
println('vweb action = "$action"')
//mut app := T{
app.vweb = Context{
req: req
conn: conn
form: map[string]string
static_files: map[string]string
static_mime_types: map[string]string
}
//}
if req.method in methods_with_form {
app.vweb.parse_form(s)
}
if vals.len < 2 {
println('no vals for http')
conn.close()
continue
}
// Serve a static file if it's one
// if app.vweb.handle_static() {
// conn.close()
// continue
// }
// Call the right action
app.$action() or {
conn.write('HTTP/1.1 404 Not Found \nContent-Type: text/plain \n\n404 not found')
}
conn.close()
}
}
pub fn foobar<T>() {
}
fn (ctx mut Context) parse_form(s string) {
if !(ctx.req.method in methods_with_form) {
return
}
pos := s.index('\r\n\r\n')
if pos > -1 {
mut str_form := s.substr(pos, s.len)
str_form = str_form.replace('+', ' ')
words := str_form.split('&')
for word in words {
println('parse form keyval="$word"')
keyval := word.trim_space().split('=')
if keyval.len != 2 { continue }
key := keyval[0]
val := urllib.query_unescape(keyval[1]) or {
continue
}
println('http form "$key" => "$val"')
ctx.form[key] = val
}
}
}
const (
mime_types = {
'.css': 'text/css; charset=utf-8',
'.gif': 'image/gif',
'.htm': 'text/html; charset=utf-8',
'.html': 'text/html; charset=utf-8',
'.jpg': 'image/jpeg',
'.js': 'application/javascript',
'.wasm': 'application/wasm',
'.pdf': 'application/pdf',
'.png': 'image/png',
'.svg': 'image/svg+xml',
'.xml': 'text/xml; charset=utf-8'
}
)
fn (ctx mut Context) scan_static_directory(directory_path, mount_path string) {
files := os.ls(directory_path)
if files.len > 0 {
for file in files {
mut ext := ''
mut i := file.len
mut flag := true
for i > 0 {
i--
if flag {
ext = file.substr(i, i + 1) + ext
}
if file.substr(i, i + 1) == '.' {
flag = false
}
}
// todo: os.is_dir is broken now
// so we expect that file is dir it has no extension
if flag {
ctx.scan_static_directory(directory_path + '/' + file, mount_path + '/' + file)
} else {
ctx.static_files[mount_path + '/' + file] = directory_path + '/' + file
ctx.static_mime_types[mount_path + '/' + file] = mime_types[ext]
}
}
}
}
pub fn (ctx mut Context) handle_static(directory_path string) bool {
ctx.scan_static_directory(directory_path, '')
static_file := ctx.static_files[ctx.req.url]
mime_type := ctx.static_mime_types[ctx.req.url]
if static_file != '' {
data := os.read_file(static_file) or { return false }
ctx.conn.write('HTTP/1.1 200 OK\nContent-Type: $mime_type\n\n$data')
return true
}
return false
}
pub fn (ctx mut Context) serve_static(url, file_path, mime_type string) {
ctx.static_files[url] = file_path
ctx.static_mime_types[url] = mime_type
}