forked from vieter-v/vieter
126 lines
2.9 KiB
V
126 lines
2.9 KiB
V
module docker
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import net.unix
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import io
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import net.http
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import strings
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import net.urllib
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import json
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import util
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const (
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socket = '/var/run/docker.sock'
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buf_len = 10 * 1024
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http_separator = [u8(`\r`), `\n`, `\r`, `\n`]
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http_chunk_separator = [u8(`\r`), `\n`]
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)
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pub struct DockerDaemon {
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mut:
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socket &unix.StreamConn
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reader &io.BufferedReader
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}
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pub fn new_conn() ?&DockerDaemon {
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s := unix.connect_stream(docker.socket)?
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d := &DockerDaemon{
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socket: s
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reader: io.new_buffered_reader(reader: s)
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}
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return d
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}
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pub fn (mut d DockerDaemon) send_request(method string, url urllib.URL) ? {
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req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\n\n'
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d.socket.write_string(req)?
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}
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pub fn (mut d DockerDaemon) send_request_with_body(method string, url urllib.URL, content_type string, body string) ? {
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req := '$method $url.request_uri() HTTP/1.1\nHost: localhost\nContent-Type: $content_type\nContent-Length: $body.len\n\n$body\n\n'
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d.socket.write_string(req)?
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}
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pub fn (mut d DockerDaemon) send_request_with_json<T>(method string, url urllib.URL, data &T) ? {
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body := json.encode(data)
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return d.send_request_with_body(method, url, 'application/json', body)
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}
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// read_response_head consumes the socket's contents until it encounters
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// '\r\n\r\n', after which it parses the response as an HTTP response.
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// Importantly, this function never consumes past the HTTP separator, so the
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// body can be read fully later on.
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pub fn (mut d DockerDaemon) read_response_head() ?http.Response {
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mut c := 0
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mut buf := []u8{len: 4}
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mut res := []u8{}
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for {
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c = d.reader.read(mut buf)?
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res << buf[..c]
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match_len := util.match_array_in_array(buf[..c], docker.http_separator)
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// mut i := 0
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// mut match_len := 0
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// for i + match_len < c {
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// if buf[i + match_len] == docker.http_separator[match_len] {
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// match_len += 1
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// } else {
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// i += match_len + 1
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// match_len = 0
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// }
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//}
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if match_len == 4 {
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break
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} else if match_len > 0 {
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mut buf2 := []u8{len: 4 - match_len}
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c2 := d.reader.read(mut buf2)?
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res << buf2[..c2]
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if buf2 == docker.http_separator[match_len..] {
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break
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}
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}
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}
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return http.parse_response(res.bytestr())
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}
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pub fn (mut d DockerDaemon) read_response_body(length int) ?string {
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if length == 0 {
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return ''
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}
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mut buf := []u8{len: docker.buf_len}
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mut c := 0
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mut builder := strings.new_builder(docker.buf_len)
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for builder.len < length {
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c = d.reader.read(mut buf) or { break }
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builder.write(buf[..c])?
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}
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return builder.str()
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}
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pub fn (mut d DockerDaemon) read_response() ?(http.Response, string) {
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head := d.read_response_head()?
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content_length := head.header.get(http.CommonHeader.content_length)?.int()
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res := d.read_response_body(content_length)?
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return head, res
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}
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pub fn (mut d DockerDaemon) get_chunked_response_reader() &ChunkedResponseReader {
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r := new_chunked_response_reader(d.reader)
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return r
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}
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