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extmod/modwebsocket: Record current fragment type (binary/text/etc.) 

Also, handle continuation frames (untested).
support-3.5
Paul Sokolovsky 2016-04-09 16:14:47 +03:00
parent 5b1c221785
commit f38e8f5217
1 changed files with 24 additions and 0 deletions
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24
extmod/modwebsocket.c
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@ -37,6 +37,12 @@
#if MICROPY_PY_WEBSOCKET
enum { FRAME_HEADER, FRAME_OPT, PAYLOAD };
#define FRAME_OPCODE_MASK 0x0f
enum {
FRAME_CONT, FRAME_TXT, FRAME_BIN,
FRAME_CLOSE = 0x8, FRAME_PING, FRAME_PONG
};
enum { BLOCKING_WRITE = 1 };
typedef struct _mp_obj_websocket_t {
@ -50,6 +56,8 @@ typedef struct _mp_obj_websocket_t {
byte buf_pos;
byte buf[6];
byte opts;
// Copy of current frame's flags
byte ws_flags;
} mp_obj_websocket_t;
STATIC mp_obj_t websocket_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
@ -87,8 +95,24 @@ STATIC mp_uint_t websocket_read(mp_obj_t self_in, void *buf, mp_uint_t size, int
switch (self->state) {
case FRAME_HEADER: {
// TODO: Split frame handling below is untested so far, so conservatively disable it
assert(self->buf[0] & 0x80);
// "Control frames MAY be injected in the middle of a fragmented message."
// So, they must be processed before data frames (and not alter
// self->ws_flags)
if ((self->buf[0] & FRAME_OPCODE_MASK) >= FRAME_CLOSE) {
// TODO: implement
assert(0);
}
if ((self->buf[0] & FRAME_OPCODE_MASK) == FRAME_CONT) {
// Preserve previous frame type
self->ws_flags = (self->ws_flags & FRAME_OPCODE_MASK) | (self->buf[0] & ~FRAME_OPCODE_MASK);
} else {
self->ws_flags = self->buf[0];
}
// Reset mask in case someone will use "simplified" protocol
// without masks.
memset(self->mask, 0, sizeof(self->mask));