It's easy to open a connection to a remote asset using URL.openStream() which returns an InputStream. What about random access?
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问题:
回答1:
HTTP 1.1 allows retrieval of parts of a resource through use of Byte Ranges, but...
- servers are not required to support it
- you will incur extra overhead due extra request/response headers, (possibly) establishing extra network connections, etc.
回答2:
True random access is not possible via http. You can simulate it though by passing a starting point as a paramater and return a stream that represents data from that position onwards.
For example this is how progressive HTTP download works (e.g. YouTube video seek).
