#L2964">source</a></span> <pre class="binding-text">(ev/read stream n &amp;opt buffer timeout)

Read up to n bytes into a buffer asynchronously from a stream. `n` can also be the keyword `:all` to read into the buffer until end of stream. Optionally provide a buffer to write into as well as a timeout in seconds after which to cancel the operation and raise an error. Returns the buffer if the read was successful or nil if end-of-stream reached. Will raise an error if there are problems with the IO operation.