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extmod/modwebrepl: Make GET_FILE operation non-blocking. 

In the sense that while GET_FILE transfers its data, REPL still works.
This is done by requiring client to send 1-byte block before WebREPL
server transfers next block of data.
webrepl-nonblock-get
Paul Sokolovsky 2016-08-02 00:14:32 +03:00
parent d45f91e8a4
commit 0db59023ba
1 changed files with 17 additions and 18 deletions
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35
extmod/modwebrepl.c
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@ -151,18 +151,7 @@ STATIC void handle_op(mp_obj_webrepl_t *self) {
if (self->hdr.type == PUT_FILE) {
self->data_to_recv = self->hdr.size;
} else if (self->hdr.type == GET_FILE) {
// TODO: It's not ideal that we block connection while sending file
// and don't process any input.
while (1) {
mp_uint_t out_sz = write_file_chunk(self);
assert(out_sz != MP_STREAM_ERROR);
if (out_sz == 0) {
break;
}
}
write_webrepl_resp(self->sock, 0);
self->hdr_to_recv = sizeof(struct webrepl_file);
self->data_to_recv = 1;
}
}
@ -250,17 +239,27 @@ STATIC mp_uint_t _webrepl_read(mp_obj_t self_in, void *buf, mp_uint_t size, int
buf_sz += sz;
}
DEBUG_printf("webrepl: Writing %lu bytes to file\n", buf_sz);
int err;
mp_uint_t res = mp_stream_write_exactly(self->cur_file, filebuf, buf_sz, &err);
if (err != 0 || res != buf_sz) {
assert(0);
if (self->hdr.type == PUT_FILE) {
DEBUG_printf("webrepl: Writing %lu bytes to file\n", buf_sz);
int err;
mp_uint_t res = mp_stream_write_exactly(self->cur_file, filebuf, buf_sz, &err);
if (err != 0 || res != buf_sz) {
assert(0);
}
} else if (self->hdr.type == GET_FILE) {
assert(buf_sz == 1);
assert(self->data_to_recv == 0);
assert(filebuf[0] == 0);
mp_uint_t out_sz = write_file_chunk(self);
if (out_sz != 0) {
self->data_to_recv = 1;
}
}
if (self->data_to_recv == 0) {
mp_stream_close(self->cur_file);
self->hdr_to_recv = sizeof(struct webrepl_file);
DEBUG_printf("webrepl: Finished writing file\n");
DEBUG_printf("webrepl: Finished file operation %d\n", self->hdr.type);
write_webrepl_resp(self->sock, 0);
}