- range_end = range_start + ctx.chunk_size - 1 if ctx.chunk_size else None
- if range_end and ctx.data_len is not None and range_end >= ctx.data_len:
- range_end = ctx.data_len - 1
- has_range = range_start is not None
- ctx.has_range = has_range
+
+ if ctx.chunk_size:
+ chunk_aware_end = range_start + ctx.chunk_size - 1
+ # we're not allowed to download outside Range
+ range_end = chunk_aware_end if req_end is None else min(chunk_aware_end, req_end)
+ elif req_end is not None:
+ # there's no need for chunked downloads, so download until the end of Range
+ range_end = req_end
+ else:
+ range_end = None
+
+ if try_call(lambda: range_start > range_end):
+ ctx.resume_len = 0
+ ctx.open_mode = 'wb'
+ raise RetryDownload(Exception(f'Conflicting range. (start={range_start} > end={range_end})'))
+
+ if try_call(lambda: range_end >= ctx.content_len):
+ range_end = ctx.content_len - 1
+