servletinputstream.html

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Java 2 Platform EE v1.3: Class  ServletInputStream
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javax.servlet</FONT>
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Class  ServletInputStream</H2>
<PRE>
java.lang.Object
  |
  +--java.io.InputStream
        |
        +--<B>javax.servlet.ServletInputStream</B>
</PRE>
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<DL>
<DT>public abstract class <B>ServletInputStream</B><DT>extends java.io.InputStream</DL>

<P>
Provides an input stream for reading binary data from a client
 request, including an efficient <code>readLine</code> method
 for reading data one line at a time. With some protocols, such
 as HTTP POST and PUT, a <code>ServletInputStream</code>
 object can be used to read data sent from the client.

 <p>A <code>ServletInputStream</code> object is normally retrieved via
 the <A HREF="../../javax/servlet/ServletRequest.html#getInputStream()"><CODE>ServletRequest.getInputStream()</CODE></A> method.


 <p>This is an abstract class that a servlet container implements.
 Subclasses of this class
 must implement the <code>java.io.InputStream.read()</code> method.
<P>
<DL>
<DT><B>See Also: </B><DD><A HREF="../../javax/servlet/ServletRequest.html"><CODE>ServletRequest</CODE></A></DL>
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<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletInputStream.html#ServletInputStream()">ServletInputStream</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Does nothing, because this is an abstract class.</TD>
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<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletInputStream.html#readLine(byte[], int, int)">readLine</A></B>(byte[]&nbsp;b,
         int&nbsp;off,
         int&nbsp;len)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reads the input stream, one line at a time.</TD>
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<TD><B>Methods inherited from class java.io.InputStream</B></TD>
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<TD><CODE>available, close, mark, markSupported, read, read, read, reset, skip</CODE></TD>
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<A NAME="ServletInputStream()"><!-- --></A><H3>
ServletInputStream</H3>
<PRE>
protected <B>ServletInputStream</B>()</PRE>
<DL>
<DD>Does nothing, because this is an abstract class.</DL>

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<A NAME="readLine(byte[], int, int)"><!-- --></A><H3>
readLine</H3>
<PRE>
public int <B>readLine</B>(byte[]&nbsp;b,
                    int&nbsp;off,
                    int&nbsp;len)
             throws java.io.IOException</PRE>
<DL>
<DD>Reads the input stream, one line at a time. Starting at an
 offset, reads bytes into an array, until it reads a certain number
 of bytes or reaches a newline character, which it reads into the
 array as well.

 <p>This method returns -1 if it reaches the end of the input
 stream before reading the maximum number of bytes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>b</CODE> - an array of bytes into which data is read<DD><CODE>off</CODE> - an integer specifying the character at which
				this method begins reading<DD><CODE>len</CODE> - an integer specifying the maximum number of 
				bytes to read<DT><B>Returns:</B><DD>an integer specifying the actual number of bytes 
				read, or -1 if the end of the stream is reached<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an input or output exception has occurred</DL>
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