mirror of
https://github.com/vlang/v.git
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245 lines
5.5 KiB
V
245 lines
5.5 KiB
V
// Copyright (c) 2019 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 http
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import net.urllib
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import http.chunked
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const (
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max_redirects = 4
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started = http.init()
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)
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struct Request {
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pub:
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headers map[string]string
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method string
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// cookies map[string]string
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h string
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cmd string
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typ string // GET POST
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data string
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url string
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ws_func voidptr
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user_ptr voidptr
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verbose bool
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user_agent string
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}
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struct Response {
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pub:
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text string
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headers map[string]string
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status_code int
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}
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pub fn get(url string) ?Response {
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req := new_request('GET', url, '') or {
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return error(err)
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}
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return req.do()
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}
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pub fn post(url, data string) ?Response {
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req := new_request('POST', url, data) or {
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return error(err)
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}
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return req.do()
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}
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pub fn new_request(typ, _url, _data string) ?Request {
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if _url == '' {
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return error('bad url')
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}
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mut url := _url
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mut data := _data
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// req.headers['User-Agent'] = 'V $VERSION'
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if typ == 'GET' && !url.contains('?') && data != '' {
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url = '$url?$data'
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data = ''
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}
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return Request {
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typ: typ
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url: url
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data: data
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ws_func: 0
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user_ptr: 0
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headers: map[string]string
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user_agent: 'v'
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}
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}
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pub fn get_text(url string) string {
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resp := get(url) or { return '' }
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return resp.text
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}
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fn (req mut Request) free() {
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req.headers.free()
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}
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fn (resp mut Response) free() {
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resp.headers.free()
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}
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pub fn (req mut Request) add_header(key, val string) {
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// println('start add header')
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// println('add header "$key" "$val"')
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// println(key)
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// println(val)
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// h := '$key: $val'
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// println('SET H')
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// req.headers << h
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req.headers[key] = val
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// mut h := req.h
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// h += ' -H "${key}: ${val}" '
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// req.h = h
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}
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pub fn parse_headers(lines []string) map[string]string {
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mut headers := map[string]string
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for i, line in lines {
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if i == 0 {
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continue
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}
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words := line.split(': ')
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if words.len != 2 {
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continue
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}
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headers[words[0]] = words[1]
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}
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return headers
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}
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pub fn (req &Request) do() ?Response {
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if req.typ == 'POST' {
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// req.headers << 'Content-Type: application/x-www-form-urlencoded'
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}
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for key, val in req.headers {
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//h := '$key: $val'
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}
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url := urllib.parse(req.url) or { return error('http.request.do: invalid URL $req.url') }
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mut rurl := url
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mut resp := Response{}
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mut no_redirects := 0
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for {
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if no_redirects == max_redirects { return error('http.request.do: maximum number of redirects reached ($max_redirects)') }
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qresp := req.method_and_url_to_response( req.typ, rurl ) or { return error(err) }
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resp = qresp
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if ! (resp.status_code in [301, 302, 303, 307, 308]) { break }
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// follow any redirects
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redirect_url := resp.headers['Location']
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qrurl := urllib.parse( redirect_url ) or { return error('http.request.do: invalid URL in redirect $redirect_url') }
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rurl = qrurl
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no_redirects++
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}
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return resp
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}
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fn (req &Request) method_and_url_to_response(method string, url net_dot_urllib.URL) ?Response {
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host_name := url.hostname()
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scheme := url.scheme
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mut p := url.path.trim_left('/')
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mut path := if url.query().size > 0 { '/$p?${url.query().encode()}' } else { '/$p' }
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mut nport := url.port().int()
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if nport == 0 {
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if scheme == 'http' { nport = 80 }
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if scheme == 'https' { nport = 443 }
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}
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//println('fetch $method, $scheme, $host_name, $nport, $path ')
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if scheme == 'https' {
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//println('ssl_do( $nport, $method, $host_name, $path )')
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return req.ssl_do( nport, method, host_name, path )
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} else if scheme == 'http' {
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//println('http_do( $nport, $method, $host_name, $path )')
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return req.http_do(nport, method, host_name, path )
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}
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return error('http.request.do: unsupported scheme: $scheme')
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}
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fn parse_response(resp string) Response {
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mut headers := map[string]string
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first_header := resp.all_before('\n')
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mut status_code := 0
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if first_header.contains('HTTP/') {
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val := first_header.find_between(' ', ' ')
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status_code = val.int()
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}
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mut text := ''
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// Build resp headers map and separate the body
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mut nl_pos := 3
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mut i := 1
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for {
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old_pos := nl_pos
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nl_pos = resp.index_after('\n', nl_pos+1)
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if nl_pos == -1 {
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break
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}
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h := resp.substr(old_pos + 1, nl_pos)
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// End of headers
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if h.len <= 1 {
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text = resp.right(nl_pos + 1)
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break
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}
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i++
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pos := h.index(':')
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if pos == -1 {
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continue
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}
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//if h.contains('Content-Type') {
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//continue
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//}
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key := h.left(pos)
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val := h.right(pos + 2)
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headers[key] = val.trim_space()
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}
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if headers['Transfer-Encoding'] == 'chunked' {
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text = chunked.decode( text )
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}
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return Response {
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status_code: status_code
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headers: headers
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text: text
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}
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}
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fn (req &Request) build_request_headers(method, host_name, path string) string {
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ua := req.user_agent
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mut uheaders := []string
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for key, val in req.headers {
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uheaders << '${key}: ${val}\r\n'
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}
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if req.data.len > 0 {
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uheaders << 'Content-Length: ${req.data.len}\r\n'
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}
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return '$method $path HTTP/1.1\r\n' +
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'Host: $host_name\r\n' +
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'User-Agent: $ua\r\n' +
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uheaders.join('') +
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'Connection: close\r\n\r\n' +
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req.data
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}
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pub fn unescape_url(s string) string {
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panic('http.unescape_url() was replaced with urllib.query_unescape()')
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}
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pub fn escape_url(s string) string {
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panic('http.escape_url() was replaced with urllib.query_escape()')
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}
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pub fn unescape(s string) string {
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panic('http.unescape() was replaced with http.unescape_url()')
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}
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pub fn escape(s string) string {
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panic('http.escape() was replaced with http.escape_url()')
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}
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type wsfn fn (s string, ptr voidptr)
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