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don't allow invalid key names on inserts

This commit is contained in:
Mike Dirolf 2009-06-01 17:38:11 -04:00
parent 6e9a5194f9
commit 71d7ff726b
5 changed files with 123 additions and 62 deletions
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46
ext/cbson/cbson.c
View File

@ -66,7 +66,7 @@ static int cmp_char(const void* a, const void* b) {
return *(char*)a - *(char*)b;
}
static void write_doc(bson_buffer* buffer, VALUE hash);
static void write_doc(bson_buffer* buffer, VALUE hash, VALUE no_dollar_sign);
static int write_element(VALUE key, VALUE value, VALUE extra);
static VALUE elements_to_hash(const char* buffer, int max);
@ -126,6 +126,10 @@ static void buffer_write_bytes(bson_buffer* buffer, const char* bytes, int size)
buffer->position += size;
}
static VALUE pack_extra(bson_buffer* buffer, VALUE no_dollar_sign) {
return rb_ary_new3(2, INT2NUM((int)buffer), no_dollar_sign);
}
static void write_name_and_type(bson_buffer* buffer, VALUE name, char type) {
buffer_write_bytes(buffer, &type, 1);
buffer_write_bytes(buffer, RSTRING_PTR(name), RSTRING_LEN(name));
@ -133,7 +137,8 @@ static void write_name_and_type(bson_buffer* buffer, VALUE name, char type) {
}
static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow_id) {
bson_buffer* buffer = (bson_buffer*)extra;
bson_buffer* buffer = (bson_buffer*)NUM2INT(rb_ary_entry(extra, 0));
VALUE no_dollar_sign = rb_ary_entry(extra, 1);
if (TYPE(key) == T_SYMBOL) {
// TODO better way to do this... ?
@ -148,6 +153,16 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
return ST_CONTINUE;
}
if (no_dollar_sign == Qtrue && RSTRING_LEN(key) > 0 && RSTRING_PTR(key)[0] == '$') {
rb_raise(rb_eRuntimeError, "key must not start with '$'");
}
int i;
for (i = 0; i < RSTRING_LEN(key); i++) {
if (RSTRING_PTR(key)[i] == '.') {
rb_raise(rb_eRuntimeError, "key must not contain '.'");
}
}
switch(TYPE(value)) {
case T_BIGNUM:
{
@ -195,7 +210,7 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
case T_HASH:
{
write_name_and_type(buffer, key, 0x03);
write_doc(buffer, value);
write_doc(buffer, value, no_dollar_sign);
break;
}
case T_ARRAY:
@ -213,7 +228,7 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
char* name;
asprintf(&name, "%d", i);
VALUE key = rb_str_new2(name);
write_element(key, values[i], (VALUE)buffer);
write_element(key, values[i], pack_extra(buffer, no_dollar_sign));
free(name);
}
@ -236,7 +251,7 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
buffer_write_bytes(buffer, (char*)&length, 4);
buffer_write_bytes(buffer, RSTRING_PTR(value), length - 1);
buffer_write_bytes(buffer, &zero, 1);
write_doc(buffer, rb_funcall(value, rb_intern("scope"), 0));
write_doc(buffer, rb_funcall(value, rb_intern("scope"), 0), Qfalse);
int total_length = buffer->position - start_position;
memcpy(buffer->buffer + length_location, &total_length, 4);
@ -302,9 +317,9 @@ static int write_element_allow_id(VALUE key, VALUE value, VALUE extra, int allow
int length_location = buffer_save_bytes(buffer, 4);
VALUE ns = rb_funcall(value, rb_intern("namespace"), 0);
write_element(rb_str_new2("$ref"), ns, (VALUE)buffer);
write_element(rb_str_new2("$ref"), ns, pack_extra(buffer, Qfalse));
VALUE oid = rb_funcall(value, rb_intern("object_id"), 0);
write_element(rb_str_new2("$id"), oid, (VALUE)buffer);
write_element(rb_str_new2("$id"), oid, pack_extra(buffer, Qfalse));
// write null byte and fill in length
buffer_write_bytes(buffer, &zero, 1);
@ -376,19 +391,19 @@ static int write_element(VALUE key, VALUE value, VALUE extra) {
return write_element_allow_id(key, value, extra, 0);
}
static void write_doc(bson_buffer* buffer, VALUE hash) {
static void write_doc(bson_buffer* buffer, VALUE hash, VALUE no_dollar_sign) {
int start_position = buffer->position;
int length_location = buffer_save_bytes(buffer, 4);
VALUE key = rb_str_new2("_id");
if (rb_funcall(hash, rb_intern("has_key?"), 1, key) == Qtrue) {
VALUE id = rb_hash_aref(hash, key);
write_element_allow_id(key, id, (VALUE)buffer, 1);
write_element_allow_id(key, id, pack_extra(buffer, no_dollar_sign), 1);
}
key = ID2SYM(rb_intern("_id"));
if (rb_funcall(hash, rb_intern("has_key?"), 1, key) == Qtrue) {
VALUE id = rb_hash_aref(hash, key);
write_element_allow_id(key, id, (VALUE)buffer, 1);
write_element_allow_id(key, id, pack_extra(buffer, no_dollar_sign), 1);
}
// we have to check for an OrderedHash and handle that specially
@ -398,10 +413,11 @@ static void write_doc(bson_buffer* buffer, VALUE hash) {
for(i = 0; i < RARRAY_LEN(keys); i++) {
VALUE key = RARRAY_PTR(keys)[i];
VALUE value = rb_hash_aref(hash, key);
write_element(key, value, (VALUE)buffer);
write_element(key, value, pack_extra(buffer, no_dollar_sign));
}
} else {
rb_hash_foreach(hash, write_element, (VALUE)buffer);
rb_hash_foreach(hash, write_element, pack_extra(buffer, no_dollar_sign));
}
// write null byte and fill in length
@ -410,11 +426,11 @@ static void write_doc(bson_buffer* buffer, VALUE hash) {
memcpy(buffer->buffer + length_location, &length, 4);
}
static VALUE method_serialize(VALUE self, VALUE doc) {
static VALUE method_serialize(VALUE self, VALUE doc, VALUE no_dollar_sign) {
bson_buffer* buffer = buffer_new();
assert(buffer);
write_doc(buffer, doc);
write_doc(buffer, doc, no_dollar_sign);
VALUE result = rb_str_new(buffer->buffer, buffer->position);
buffer_free(buffer);
@ -681,6 +697,6 @@ void Init_cbson() {
OrderedHash = rb_const_get(rb_cObject, rb_intern("OrderedHash"));
VALUE CBson = rb_define_module("CBson");
rb_define_module_function(CBson, "serialize", method_serialize, 1);
rb_define_module_function(CBson, "serialize", method_serialize, 2);
rb_define_module_function(CBson, "deserialize", method_deserialize, 1);
}

2
lib/mongo/message/insert_message.rb
View File

@ -27,7 +27,7 @@ module XGen
super(OP_INSERT)
write_int(0)
write_string("#{db_name}.#{collection_name}")
objs.each { |o| write_doc(o) }
objs.each { |o| write_doc(o, true) }
end
end
end

4
lib/mongo/message/message.rb
View File

@ -58,8 +58,8 @@ module XGen
update_message_length
end
def write_doc(hash)
@buf.put_array(BSON.new.serialize(hash).to_a)
def write_doc(hash, no_dollar_sign=false)
@buf.put_array(BSON.new.serialize(hash, no_dollar_sign).to_a)
update_message_length
end

35
lib/mongo/util/bson.rb
View File

@ -73,11 +73,11 @@ class BSON
begin
require 'mongo_ext/cbson'
def serialize(obj)
@buf = ByteBuffer.new(CBson.serialize(obj))
def serialize(obj, no_dollar_sign=false)
@buf = ByteBuffer.new(CBson.serialize(obj, no_dollar_sign))
end
rescue LoadError
def serialize(obj)
def serialize(obj, no_dollar_sign=false)
raise "Document is null" unless obj
@buf.rewind
@ -86,12 +86,12 @@ class BSON
# Write key/value pairs. Always write _id first if it exists.
if obj.has_key? '_id'
serialize_key_value('_id', obj['_id'])
serialize_key_value('_id', obj['_id'], no_dollar_sign)
elsif obj.has_key? :_id
serialize_key_value('_id', obj[:_id])
serialize_key_value('_id', obj[:_id], no_dollar_sign)
end
obj.each {|k, v| serialize_key_value(k, v) unless k == '_id' || k == :_id }
obj.each {|k, v| serialize_key_value(k, v, no_dollar_sign) unless k == '_id' || k == :_id }
serialize_eoo_element(@buf)
@buf.put_int(@buf.size, 0)
@ -99,7 +99,14 @@ class BSON
end
end
def serialize_key_value(k, v)
def serialize_key_value(k, v, no_dollar_sign)
k = k.to_s
if no_dollar_sign and k[0] == ?$
raise RuntimeError.new("key #{k} must not start with '$'")
end
if k.include? ?.
raise RuntimeError.new("key #{k} must not contain '.'")
end
type = bson_type(v)
case type
when STRING, SYMBOL
@ -107,11 +114,11 @@ class BSON
when NUMBER, NUMBER_INT
serialize_number_element(@buf, k, v, type)
when OBJECT
serialize_object_element(@buf, k, v)
serialize_object_element(@buf, k, v, no_dollar_sign)
when OID
serialize_oid_element(@buf, k, v)
when ARRAY
serialize_array_element(@buf, k, v)
serialize_array_element(@buf, k, v, no_dollar_sign)
when REGEX
serialize_regex_element(@buf, k, v)
when BOOLEAN
@ -344,7 +351,7 @@ class BSON
oh = OrderedHash.new
oh['$ref'] = val.namespace
oh['$id'] = val.object_id
serialize_object_element(buf, key, oh)
serialize_object_element(buf, key, oh, false)
end
def serialize_binary_element(buf, key, val)
@ -397,18 +404,18 @@ class BSON
end
end
def serialize_object_element(buf, key, val, opcode=OBJECT)
def serialize_object_element(buf, key, val, no_dollar_sign, opcode=OBJECT)
buf.put(opcode)
self.class.serialize_cstr(buf, key)
buf.put_array(BSON.new.serialize(val).to_a)
buf.put_array(BSON.new.serialize(val, no_dollar_sign).to_a)
end
def serialize_array_element(buf, key, val)
def serialize_array_element(buf, key, val, no_dollar_sign)
# Turn array into hash with integer indices as keys
h = OrderedHash.new
i = 0
val.each { |v| h[i] = v; i += 1 }
serialize_object_element(buf, key, h, ARRAY)
serialize_object_element(buf, key, h, no_dollar_sign, ARRAY)
end
def serialize_regex_element(buf, key, val)

38
tests/test_db_api.rb
View File

@ -585,6 +585,44 @@ class DBAPITest < Test::Unit::TestCase
assert_equal 2, @@coll.count
end
def test_invalid_key_names
@@coll.clear
@@coll.insert({"hello" => "world"})
@@coll.insert({"hello" => {"hello" => "world"}})
assert_raise RuntimeError do
@@coll.insert({"$hello" => "world"})
end
assert_raise RuntimeError do
@@coll.insert({"hello" => {"$hello" => "world"}})
end
@@coll.insert({"he$llo" => "world"})
@@coll.insert({"hello" => {"hell$o" => "world"}})
assert_raise RuntimeError do
@@coll.insert({".hello" => "world"})
end
assert_raise RuntimeError do
@@coll.insert({"hello" => {".hello" => "world"}})
end
assert_raise RuntimeError do
@@coll.insert({"hello." => "world"})
end
assert_raise RuntimeError do
@@coll.insert({"hello" => {"hello." => "world"}})
end
assert_raise RuntimeError do
@@coll.insert({"hel.lo" => "world"})
end
assert_raise RuntimeError do
@@coll.insert({"hello" => {"hel.lo" => "world"}})
end
@@coll.modify({"hello" => "world"}, {"$inc" => "hello"})
end
# TODO this test fails with error message "Undefed Before end of object"
# That is a database error. The undefined type may go away.