v/vlib/http/http.v

212 lines
4.6 KiB
Go

// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module http
import net.urllib
import http.chunked
const (
max_redirects = 4
)
struct Request {
pub:
headers2 []string
headers map[string]string
method string
// cookies map[string]string
h string
cmd string
typ string // GET POST
data string
url string
ws_func voidptr
user_ptr voidptr
verbose bool
}
struct Response {
pub:
text string
headers map[string]string
status_code int
}
pub fn get(url string) ?Response {
req := new_request('GET', url, '') or {
return error(err)
}
return req.do()
}
pub fn post(url, data string) ?Response {
req := new_request('POST', url, data) or {
return error(err)
}
return req.do()
}
pub fn new_request(typ, _url, _data string) ?Request {
if _url == '' {
return error('bad url')
}
mut url := _url
mut data := _data
// req.headers['User-Agent'] = 'V $VERSION'
if typ == 'GET' && !url.contains('?') && data != '' {
url = '$url?$data'
data = ''
}
return Request {
typ: typ
url: url
data: data
ws_func: 0
user_ptr: 0
headers: map[string]string
}
}
pub fn get_text(url string) string {
resp := get(url) or { return '' }
return resp.text
}
fn (req mut Request) free() {
req.headers.free()
}
fn (resp mut Response) free() {
resp.headers.free()
}
pub fn (req mut Request) add_header(key, val string) {
// println('start add header')
// println('add header "$key" "$val"')
// println(key)
// println(val)
// h := '$key: $val'
// println('SET H')
// req.headers << h
req.headers[key] = val
// mut h := req.h
// h += ' -H "${key}: ${val}" '
// req.h = h
}
pub fn (req &Request) do() ?Response {
if req.typ == 'POST' {
// req.headers << 'Content-Type: application/x-www-form-urlencoded'
}
for key, val in req.headers {
//h := '$key: $val'
}
url := urllib.parse(req.url) or {
return error('http.request.do: invalid URL $req.url')
// return Response{} //error('ff')}
}
is_ssl := url.scheme == 'https'
if !is_ssl {
return error('non https requests are not supported right now')
}
// first request
mut p := url.path.trim_left('/')
mut u := if url.query().size > 0 { '/$p?${url.query().encode()}' } else { '/$p' }
mut resp := ssl_do(req.typ, url.hostname(), u)
// follow any redirects
mut no_redirects := 0
for resp.status_code in [301, 302, 303, 307, 308] {
if no_redirects == max_redirects {
return error('http.request.do: maximum number of redirects reached ($max_redirects)')
}
h_loc := resp.headers['Location']
r_url := urllib.parse(h_loc) or {
return error('http.request.do: cannot follow redirect, location header has invalid url $h_loc')
}
p = r_url.path.trim_left('/')
u = if r_url.query().size > 0 { '/$p?${r_url.query().encode()}' } else { '/$p' }
resp = ssl_do(req.typ, r_url.hostname(), u)
no_redirects++
}
return resp
}
fn parse_response(resp string) Response {
mut headers := map[string]string
first_header := resp.all_before('\n')
mut status_code := 0
if first_header.contains('HTTP/') {
val := first_header.find_between(' ', ' ')
status_code = val.int()
}
mut text := ''
// Build resp headers map and separate the body
mut nl_pos := 3
mut i := 1
for {
old_pos := nl_pos
nl_pos = resp.index_after('\n', nl_pos+1)
if nl_pos == -1 {
break
}
h := resp.substr(old_pos + 1, nl_pos)
// End of headers
if h.len <= 1 {
text = resp.right(nl_pos + 1)
break
}
i++
pos := h.index(':')
if pos == -1 {
continue
}
//if h.contains('Content-Type') {
//continue
//}
key := h.left(pos)
val := h.right(pos + 2)
headers[key] = val.trim_space()
}
if headers['Transfer-Encoding'] == 'chunked' {
text = chunked.decode( text )
}
return Response {
status_code: status_code
headers: headers
text: text
}
}
fn build_request_headers(user_agent, method, host_name, path string) string {
ua := if user_agent == '' { 'v' } else { user_agent }
return '$method $path HTTP/1.1\r\n' +
'Host: $host_name\r\n' +
'User-Agent: $ua\r\n' +
'Connection: close\r\n\r\n'
}
pub fn unescape_url(s string) string {
panic('http.unescape_url() was replaced with urllib.query_unescape()')
}
pub fn escape_url(s string) string {
panic('http.escape_url() was replaced with urllib.query_escape()')
}
pub fn unescape(s string) string {
panic('http.unescape() was replaced with http.unescape_url()')
}
pub fn escape(s string) string {
panic('http.escape() was replaced with http.escape_url()')
}
type wsfn fn (s string, ptr voidptr)