Added URL parameter {en,de}coding.

[jsvc.git] / src / dolda / jsvc / util / Misc.java

diff --git a/src/dolda/jsvc/util/Misc.java b/src/dolda/jsvc/util/Misc.java
index e92b324..a86735a 100644 (file)
--- a/src/dolda/jsvc/util/Misc.java
+++ b/src/dolda/jsvc/util/Misc.java
@@ -5,6 +5,7 @@ import java.util.*;
 import java.io.*;
 
 public class Misc {
+    public static final java.nio.charset.Charset utf8 = java.nio.charset.Charset.forName("UTF-8");
     private static Map<Integer, String> stext = new HashMap<Integer, String>();
     
     static {
@@ -52,4 +53,54 @@ public class Misc {
        ret = new ErrorHandler(ret);
        return(ret);
     }
+    
+    public static int hex2int(char digit) {
+       if((digit >= '0') && (digit <= '9'))
+           return(digit - '0');
+       if((digit >= 'a') && (digit <= 'f'))
+           return(digit - 'a' + 10);
+       if((digit >= 'A') && (digit <= 'F'))
+           return(digit - 'A' + 10);
+       throw(new NumberFormatException("Invalid hex digit " + digit));
+    }
+    
+    public static char int2hex(int nibble, boolean upper) {
+       if((nibble >= 0) && (nibble <= 9))
+           return((char)('0' + nibble));
+       if((nibble >= 10) && (nibble <= 15))
+           return((char)((upper?'A':'a') + nibble - 10));
+       throw(new NumberFormatException("Invalid hex nibble " + nibble));
+    }
+
+    public static String htmlq(String in) {
+       StringBuilder buf = new StringBuilder();
+       for(int i = 0; i < in.length(); i++) {
+           char c = in.charAt(i);
+           if(c == '&')
+               buf.append("&amp;");
+           else if(c == '<')
+               buf.append("&lt;");
+           else if(c == '>')
+               buf.append("&gt;");
+           else
+               buf.append(c);
+       }
+       return(buf.toString());
+    }
+    
+    public static String urlq(String in) {
+       byte[] bytes = in.getBytes(utf8);
+       StringBuilder buf = new StringBuilder();
+       for(int i = 0; i < bytes.length; i++) {
+           byte b = bytes[i];
+           if((b < 32) || (b == ' ') || (b == '&') || (b == '?') || (b == '/') || (b == '=') || (b == '#') || (b == '%') || (b == '+') || (b >= 128)) {
+               buf.append('%');
+               buf.append(int2hex((b & 0xf0) >> 4, true));
+               buf.append(int2hex(b & 0x0f, true));
+           } else {
+               buf.append((char)b);
+           }
+       }
+       return(buf.toString());
+    }
 }