Package graphql.parser

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

    • Method Summary

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

      • Methods inherited from class java.io.Reader

        nullReader, transferTo

      • 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 @NonNull [] 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​(@NonNull 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 @NonNull [] 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.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        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