Add forward slash as escape character

ext/json/ext/generator/generator.c

@@ -16,7 +16,7 @@ static ID i_to_s, i_to_json, i_new, i_indent, i_space, i_space_before,
           i_object_nl, i_array_nl, i_max_nesting, i_allow_nan, i_ascii_only,
           i_quirks_mode, i_pack, i_unpack, i_create_id, i_extend, i_key_p,
           i_aref, i_send, i_respond_to_p, i_match, i_keys, i_depth,
-          i_buffer_initial_length, i_dup;
+          i_buffer_initial_length, i_dup, i_escape_slash;
 
 /*
  * Copyright 2001-2004 Unicode, Inc.
@@ -124,7 +124,7 @@ static void unicode_escape_to_buffer(FBuffer *buffer, char buf[6], UTF16
 
 /* Converts string to a JSON string in FBuffer buffer, where all but the ASCII
  * and control characters are JSON escaped. */
-static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string)
+static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string, char escape_slash)
 {
     const UTF8 *source = (UTF8 *) RSTRING_PTR(string);
     const UTF8 *sourceEnd = source + RSTRING_LEN(string);
@@ -174,6 +174,11 @@ static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string)
                         case '"':
                             fbuffer_append(buffer, "\\\"", 2);
                             break;
+                        case '/':
+                            if(escape_slash) {
+                                fbuffer_append(buffer, "\\/", 2);
+                                break;
+                            }
                         default:
                             fbuffer_append_char(buffer, (char)ch);
                             break;
@@ -222,7 +227,7 @@ static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string)
  * characters required by the JSON standard are JSON escaped. The remaining
  * characters (should be UTF8) are just passed through and appended to the
  * result. */
-static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string)
+static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string, char escape_slash)
 {
     const char *ptr = RSTRING_PTR(string), *p;
     unsigned long len = RSTRING_LEN(string), start = 0, end = 0;
@@ -272,6 +277,12 @@ static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string)
                     escape =  "\\\"";
                     escape_len = 2;
                     break;
+                case '/':
+                    if(escape_slash) {
+                        escape = "\\/";
+                        escape_len = 2;
+                        break;
+                    }
                 default:
                     {
                         unsigned short clen = trailingBytesForUTF8[c] + 1;
@@ -624,6 +635,8 @@ static VALUE cState_configure(VALUE self, VALUE opts)
     state->ascii_only = RTEST(tmp);
     tmp = rb_hash_aref(opts, ID2SYM(i_quirks_mode));
     state->quirks_mode = RTEST(tmp);
+    tmp = rb_hash_aref(opts, ID2SYM(i_escape_slash));
+    state->escape_slash = RTEST(tmp);
     return self;
 }
 
@@ -659,6 +672,7 @@ static VALUE cState_to_h(VALUE self)
     rb_hash_aset(result, ID2SYM(i_ascii_only), state->ascii_only ? Qtrue : Qfalse);
     rb_hash_aset(result, ID2SYM(i_quirks_mode), state->quirks_mode ? Qtrue : Qfalse);
     rb_hash_aset(result, ID2SYM(i_max_nesting), LONG2FIX(state->max_nesting));
+    rb_hash_aset(result, ID2SYM(i_escape_slash), state->escape_slash ? Qtrue : Qfalse);
     rb_hash_aset(result, ID2SYM(i_depth), LONG2FIX(state->depth));
     rb_hash_aset(result, ID2SYM(i_buffer_initial_length), LONG2FIX(state->buffer_initial_length));
     return result;
@@ -792,9 +806,9 @@ static void generate_json_string(FBuffer *buffer, VALUE Vstate, JSON_Generator_S
     obj = rb_funcall(obj, i_encode, 1, CEncoding_UTF_8);
 #endif
     if (state->ascii_only) {
-        convert_UTF8_to_JSON_ASCII(buffer, obj);
+        convert_UTF8_to_JSON_ASCII(buffer, obj, state->escape_slash);
     } else {
-        convert_UTF8_to_JSON(buffer, obj);
+        convert_UTF8_to_JSON(buffer, obj, state->escape_slash);
     }
     fbuffer_append_char(buffer, '"');
 }
@@ -1245,6 +1259,31 @@ static VALUE cState_max_nesting_set(VALUE self, VALUE depth)
     return state->max_nesting = FIX2LONG(depth);
 }
 
+/*
+ * call-seq: escape_slash
+ *
+ * If this boolean is true, the forward slashes will be escaped in
+ * the json output.
+ */
+static VALUE cState_escape_slash(VALUE self)
+{
+    GET_STATE(self);
+    return state->escape_slash ? Qtrue : Qfalse;
+}
+
+/*
+ * call-seq: escape_slash=(depth)
+ *
+ * This sets whether or not the forward slashes will be escaped in
+ * the json output.
+ */
+static VALUE cState_escape_slash_set(VALUE self, VALUE enable)
+{
+    GET_STATE(self);
+    state->escape_slash = RTEST(enable);
+    return Qnil;
+}
+
 /*
  * call-seq: allow_nan?
  *
@@ -1377,6 +1416,9 @@ void Init_generator(void)
     rb_define_method(cState, "array_nl=", cState_array_nl_set, 1);
     rb_define_method(cState, "max_nesting", cState_max_nesting, 0);
     rb_define_method(cState, "max_nesting=", cState_max_nesting_set, 1);
+    rb_define_method(cState, "escape_slash", cState_escape_slash, 0);
+    rb_define_method(cState, "escape_slash?", cState_escape_slash, 0);
+    rb_define_method(cState, "escape_slash=", cState_escape_slash_set, 1);
     rb_define_method(cState, "check_circular?", cState_check_circular_p, 0);
     rb_define_method(cState, "allow_nan?", cState_allow_nan_p, 0);
     rb_define_method(cState, "ascii_only?", cState_ascii_only_p, 0);
@@ -1432,6 +1474,7 @@ void Init_generator(void)
     i_object_nl = rb_intern("object_nl");
     i_array_nl = rb_intern("array_nl");
     i_max_nesting = rb_intern("max_nesting");
+    i_escape_slash = rb_intern("escape_slash");
     i_allow_nan = rb_intern("allow_nan");
     i_ascii_only = rb_intern("ascii_only");
     i_quirks_mode = rb_intern("quirks_mode");

ext/json/ext/generator/generator.h

@@ -50,8 +50,8 @@ static const UTF32 halfMask = 0x3FFUL;
 static unsigned char isLegalUTF8(const UTF8 *source, unsigned long length);
 static void unicode_escape(char *buf, UTF16 character);
 static void unicode_escape_to_buffer(FBuffer *buffer, char buf[6], UTF16 character);
-static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string);
-static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string);
+static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string, char escape_slash);
+static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string, char escape_slash);
 static char *fstrndup(const char *ptr, unsigned long len);
 
 /* ruby api and some helpers */
@@ -74,6 +74,7 @@ typedef struct JSON_Generator_StateStruct {
     char allow_nan;
     char ascii_only;
     char quirks_mode;
+    char escape_slash;
     long depth;
     long buffer_initial_length;
 } JSON_Generator_State;
@@ -145,6 +146,8 @@ static VALUE cState_allow_nan_p(VALUE self);
 static VALUE cState_ascii_only_p(VALUE self);
 static VALUE cState_depth(VALUE self);
 static VALUE cState_depth_set(VALUE self, VALUE depth);
+static VALUE cState_escape_slash(VALUE self);
+static VALUE cState_escape_slash_set(VALUE self, VALUE depth);
 static FBuffer *cState_prepare_buffer(VALUE self);
 #ifndef ZALLOC
 #define ZALLOC(type) ((type *)ruby_zalloc(sizeof(type)))

java/src/json/ext/Generator.java

@@ -136,7 +136,7 @@ public RuntimeInfo getInfo() {
 
         public StringEncoder getStringEncoder() {
             if (stringEncoder == null) {
-                stringEncoder = new StringEncoder(context, getState().asciiOnly());
+                stringEncoder = new StringEncoder(context, getState().asciiOnly(), getState().escapeSlash());
             }
             return stringEncoder;
         }

java/src/json/ext/GeneratorState.java

@@ -83,6 +83,12 @@ public class GeneratorState extends RubyObject {
      */
     private boolean quirksMode = DEFAULT_QUIRKS_MODE;
     static final boolean DEFAULT_QUIRKS_MODE = false;
+    /**
+     * If set to <code>true</code> the forward slash will be escaped in
+     * json output.
+     */
+    private boolean escapeSlash = DEFAULT_ESCAPE_SLASH;
+    static final boolean DEFAULT_ESCAPE_SLASH = false;
     /**
      * The initial buffer length of this state. (This isn't really used on all
      * non-C implementations.)
@@ -172,6 +178,9 @@ static GeneratorState fromState(ThreadContext context, RuntimeInfo info,
      * <code>-Infinity</code> should be generated, otherwise an exception is
      * thrown if these values are encountered.
      * This options defaults to <code>false</code>.
+     * <dt><code>:escape_slash</code>
+     * <dd>set to <code>true</code> if the forward slashes should be escaped
+     * in the json output (default: <code>false</code>)
      */
     @JRubyMethod(optional=1, visibility=Visibility.PRIVATE)
     public IRubyObject initialize(ThreadContext context, IRubyObject[] args) {
@@ -195,6 +204,7 @@ public IRubyObject initialize_copy(ThreadContext context, IRubyObject vOrig) {
         this.allowNaN = orig.allowNaN;
         this.asciiOnly = orig.asciiOnly;
         this.quirksMode = orig.quirksMode;
+        this.escapeSlash = orig.escapeSlash;
         this.bufferInitialLength = orig.bufferInitialLength;
         this.depth = orig.depth;
         return this;
@@ -381,6 +391,24 @@ public IRubyObject max_nesting_set(IRubyObject max_nesting) {
         return max_nesting;
     }
 
+    /**
+     * Returns true if forward slashes are escaped in the json output.
+     */
+    public boolean escapeSlash() {
+        return escapeSlash;
+    }
+
+    @JRubyMethod(name="escape_slash")
+    public RubyBoolean escape_slash_get(ThreadContext context) {
+        return context.getRuntime().newBoolean(escapeSlash);
+    }
+
+    @JRubyMethod(name="escape_slash=")
+    public IRubyObject escape_slash_set(IRubyObject escape_slash) {
+        escapeSlash = escape_slash.isTrue();
+        return escape_slash.getRuntime().newBoolean(escapeSlash);
+    }
+
     public boolean allowNaN() {
         return allowNaN;
     }
@@ -482,6 +510,7 @@ public IRubyObject configure(ThreadContext context, IRubyObject vOpts) {
         allowNaN   = opts.getBool("allow_nan",  DEFAULT_ALLOW_NAN);
         asciiOnly  = opts.getBool("ascii_only", DEFAULT_ASCII_ONLY);
         quirksMode = opts.getBool("quirks_mode", DEFAULT_QUIRKS_MODE);
+        escapeSlash = opts.getBool("escape_slash", DEFAULT_ESCAPE_SLASH);
         bufferInitialLength = opts.getInt("buffer_initial_length", DEFAULT_BUFFER_INITIAL_LENGTH);
 
         depth = opts.getInt("depth", 0);
@@ -510,6 +539,7 @@ public RubyHash to_h(ThreadContext context) {
         result.op_aset(context, runtime.newSymbol("ascii_only"), ascii_only_p(context));
         result.op_aset(context, runtime.newSymbol("quirks_mode"), quirks_mode_p(context));
         result.op_aset(context, runtime.newSymbol("max_nesting"), max_nesting_get(context));
+        result.op_aset(context, runtime.newSymbol("escape_slash"), escape_slash_get(context));
         result.op_aset(context, runtime.newSymbol("depth"), depth_get(context));
         result.op_aset(context, runtime.newSymbol("buffer_initial_length"), buffer_initial_length_get(context));
         for (String name: getInstanceVariableNameList()) {

java/src/json/ext/StringEncoder.java

@@ -10,7 +10,7 @@
  * and throws a GeneratorError if any problem is found.
  */
 final class StringEncoder extends ByteListTranscoder {
-    private final boolean asciiOnly;
+    private final boolean asciiOnly, escapeSlash;
 
     // Escaped characters will reuse this array, to avoid new allocations
     // or appending them byte-by-byte
@@ -32,9 +32,10 @@ final class StringEncoder extends ByteListTranscoder {
             new byte[] {'0', '1', '2', '3', '4', '5', '6', '7',
                         '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
 
-    StringEncoder(ThreadContext context, boolean asciiOnly) {
+    StringEncoder(ThreadContext context, boolean asciiOnly, boolean escapeSlash) {
         super(context);
         this.asciiOnly = asciiOnly;
+        this.escapeSlash = escapeSlash;
     }
 
     void encode(ByteList src, ByteList out) {
@@ -68,6 +69,11 @@ private void handleChar(int c) {
         case '\b':
             escapeChar('b');
             break;
+        case '/':
+            if(escapeSlash) {
+                escapeChar((char)c);
+                break;
+            }
         default:
             if (c >= 0x20 && c <= 0x7f ||
                     (c >= 0x80 && !asciiOnly)) {

lib/json/common.rb

@@ -358,12 +358,14 @@ class << self
     #  :max_nesting: false
     #  :allow_nan:   true
     #  :quirks_mode: true
+    #  :escape_slash: true
     attr_accessor :dump_default_options
   end
   self.dump_default_options = {
     :max_nesting => false,
     :allow_nan   => true,
     :quirks_mode => true,
+    :escape_slash => true,
   }
 
   # Dumps _obj_ as a JSON string, i.e. calls generate on the object and returns
@@ -443,7 +445,7 @@ module ::Kernel
   # one line.
   def j(*objs)
     objs.each do |obj|
-      puts JSON::generate(obj, :allow_nan => true, :max_nesting => false)
+      puts JSON::generate(obj, :allow_nan => true, :max_nesting => false, :escape_slash => true)
     end
     nil
   end
@@ -452,7 +454,7 @@ def j(*objs)
   # indentation and over many lines.
   def jj(*objs)
     objs.each do |obj|
-      puts JSON::pretty_generate(obj, :allow_nan => true, :max_nesting => false)
+      puts JSON::pretty_generate(obj, :allow_nan => true, :max_nesting => false, :escape_slash => true)
     end
     nil
   end