graphql.parser

Class SafeTokenReader

java.lang.Object

java.io.Reader

graphql.parser.SafeTokenReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Readable

public class SafeTokenReader
extends java.io.Reader

This reader will only emit a maximum number of characters from it. This is used to protect us from evil input.

If a graphql system does not have some max HTTP input limit, then this will help protect the system. This is a limit of last resort. Ideally the http input should be limited, but if its not, we have this.

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
SafeTokenReader(java.io.Reader delegate, int maxCharacters, java.util.function.Consumer<java.lang.Integer> whenMaxCharactersExceeded)

Method Summary

Modifier and Type	Method and Description
void	close()
void	mark(int readAheadLimit)
boolean	markSupported()
int	read()
int	read(char[] buff)
int	read(char[] buff, int off, int len)
int	read(@NotNull java.nio.CharBuffer target)
boolean	ready()
void	reset()
long	skip(long n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SafeTokenReader

public SafeTokenReader(java.io.Reader delegate,
                       int maxCharacters,
                       java.util.function.Consumer<java.lang.Integer> whenMaxCharactersExceeded)

Method Detail

read

public int read(char[] buff,
                int off,
                int len)
         throws java.io.IOException

Specified by:

read in class java.io.Reader

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.Reader

Throws:

java.io.IOException

read

public int read(@NotNull
                @NotNull java.nio.CharBuffer target)
         throws java.io.IOException

Specified by:

read in interface java.lang.Readable

Overrides:

read in class java.io.Reader

Throws:

java.io.IOException

read

public int read(char[] buff)
         throws java.io.IOException

Overrides:

read in class java.io.Reader

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class java.io.Reader

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.Reader

Throws:

java.io.IOException

ready

public boolean ready()
              throws java.io.IOException

Overrides:

ready in class java.io.Reader

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.Reader

mark

public void mark(int readAheadLimit)
          throws java.io.IOException

Overrides:

mark in class java.io.Reader

Throws:

java.io.IOException

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.Reader

Throws:

java.io.IOException