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v/vlib/net/websocket/utils.v

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module websocket
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import time
import rand
import math
import crypto.sha1
import encoding.base64
fn htonl64(payload_len u64) byteptr {
mut ret := malloc(8)
ret[0] = byte(((payload_len & (u64(0xff) << 56)) >> 56) & 0xff)
ret[1] = byte(((payload_len & (u64(0xff) << 48)) >> 48) & 0xff)
ret[2] = byte(((payload_len & (u64(0xff) << 40)) >> 40) & 0xff)
ret[3] = byte(((payload_len & (u64(0xff) << 32)) >> 32) & 0xff)
ret[4] = byte(((payload_len & (u64(0xff) << 24)) >> 24) & 0xff)
ret[5] = byte(((payload_len & (u64(0xff) << 16)) >> 16) & 0xff)
ret[6] = byte(((payload_len & (u64(0xff) << 8)) >> 8) & 0xff)
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ret[7] = byte(((payload_len & (u64(0xff) << 0)) >> 0) & 0xff)
return ret
}
fn create_masking_key() []byte {
t := time.ticks()
tseq := t % 23237671
mut rnd := rand.new_pcg32(u64(t), u64(tseq) )
mask_bit := byte(rnd.bounded_next(u32(math.max_i32)))
buf := [`0`].repeat(4)
C.memcpy(buf.data, &mask_bit, 4)
return buf
}
fn create_key_challenge_response(seckey string) string {
guid := "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
sha1buf := seckey + guid
hash := sha1.sum(sha1buf.bytes())
hashstr := string(byteptr(hash.data))
b64 := base64.encode(hashstr)
unsafe {
sha1buf.free()
hash.free()
}
return b64
}
fn get_nonce() string {
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mut nonce := []byte{}
alphanum := "0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz"
for i in 0..18 {
nonce << alphanum[rand.next(61)]
}
return string(byteptr(nonce.data))
}