v/vlib/vweb/request.v

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module vweb
import io
import net.http
import net.urllib
pub fn parse_request(mut reader io.BufferedReader) ?http.Request {
// request line
mut line := reader.read_line() ?
method, target, version := parse_request_line(line) ?
// headers
mut headers := map[string][]string{}
line = reader.read_line() ?
for line != '' {
key, values := parse_header(line) ?
headers[key] << values
line = reader.read_line() ?
}
mut http_headers := map[string]string{}
mut http_lheaders := map[string]string{}
for k, v in headers {
values := v.join('; ')
http_headers[k] = values
http_lheaders[k.to_lower()] = values
}
// body
mut body := [byte(0)]
if 'content-length' in http_lheaders {
n := http_lheaders['content-length'].int()
body = []byte{len: n, cap: n + 1}
reader.read(mut body) or { }
body << 0
}
return http.Request{
method: method
url: target.str()
headers: http_headers
lheaders: http_lheaders
data: string(body)
version: version
}
}
fn parse_request_line(s string) ?(http.Method, urllib.URL, http.Version) {
words := s.split(' ')
if words.len != 3 {
return error('malformed request line')
}
method := http.method_from_str(words[0])
target := urllib.parse(words[1]) ?
version := http.version_from_str(words[2])
if version == .unknown {
return error('unsupported version')
}
return method, target, version
}
fn parse_header(s string) ?(string, []string) {
if ':' !in s {
return error('missing colon in header')
}
words := s.split_nth(':', 2)
if !is_token(words[0]) {
return error('invalid character in header name')
}
// TODO: parse quoted text according to the RFC
return words[0], words[1].trim_left(' \t').split(';').map(it.trim_space())
}
// TODO: use map for faster lookup (untested)
const token_chars = r"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!#$%&'*+-.^_`|~".bytes()
fn is_token(s string) bool {
for c in s {
if c !in vweb.token_chars {
return false
}
}
return true
}