java - Read from InputStream exact length -

i’m implementing program in java downloads web pages using http protocol. after sending get request server , reading response headers (incl. content-length) program reads char array amount of chars (as specified in content-length).

i’ve tried using both bufferedreader , inputstreamreader classes.

the problem

if content-length high enough, part of stream read , rest of bytes not touched (like end has read available bytes , other end hadn’t finished writing).

the reason

as stated in documentation of bufferedreader class:

this iterated read continues until 1 of following conditions becomes true: *

specified number of characters have been read

read method of underlying stream returns * -1, indicating end-of-file, or * *

ready method of underlying stream * returns false, indicating further input requests * block.

i’m afraid bullet number 3 causing read quit in middle although amount of bytes specified not yet read.

i can implement functionality myself, wondering if there’s class ignores bullet number 3 , blocks until bytes have been read, not find one.

try (bufferedreader buffer = new bufferedreader(new inputstreamreader(stream))) {     char[] arr = new char[contentlength];     buffer.read(arr, 0, contentlength);     text.append(arr); } 

the meaning of part ready() method of underlying reader block until @ least 1 character has been transferred, not block again. there no guarantee fill buffer.

you have loop.