pinetime/wasp-os
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Use base64 encoding for binary upload

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The old encoding had a 300% overhead
Base64 has a 33% overhead

Signed-off-by: Francesco Gazzetta <fgaz@fgaz.me>
This commit is contained in:
Francesco Gazzetta 2022-06-15 18:54:19 +02:00
parent 59c943d212
commit 6147ea5712
1 changed files with 11 additions and 3 deletions
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14
tools/wasptool
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@ -4,6 +4,7 @@
# Copyright (c) 2020 Daniel Thompson
import argparse
import binascii
import io
import random
import os.path
@ -294,12 +295,17 @@ def handle_binary_upload(c, fname, tname):
c.sendline(f'os.mkdir("{dname}")')
c.run_command('del os')
c.run_command('import ubinascii')
c.run_command(f'f = open("{tname}", "wb")')
# We define a function with a short name to reduce the constant per-chunk
# overhead.
# We use a lambda to avoid the "..." prompt triggered by def.
c.run_command(f'w = lambda d: f.write(ubinascii.a2b_base64(d))')
# Absorb the file to be uploaded
with open(fname, 'rb') as f:
data = f.read()
chunksz = 24
chunksz = 64
nchunks = len(data) // chunksz
lastchunk = len(data) % chunksz
@ -308,11 +314,13 @@ def handle_binary_upload(c, fname, tname):
# Send the data
for i in pbar(range(0, chunksz*nchunks, chunksz), verbose):
c.run_command(f'f.write({repr(data[i:i+chunksz])})')
c.run_command(f'w({repr(binascii.b2a_base64(data[i:i+chunksz]))})')
if lastchunk:
c.run_command(f'f.write({repr(data[-lastchunk:])})')
c.run_command(f'w({repr(binascii.b2a_base64(data[-lastchunk:]))})')
c.run_command('f.close()')
c.run_command('del w')
c.run_command('del ubinascii')
def handle_upload(c, fname, tname):
verbose = bool(c.logfile)