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Added check for maximum nesting depth.

This commit is contained in:
Elf M. Sternberg 2013-04-17 22:05:15 -07:00
parent dd332e3354
commit 7efcbb6b40
2 changed files with 59 additions and 40 deletions
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80
src/tumble.peg
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@ -8,6 +8,7 @@
this.content = c
this.stack = [c];
this.templates = {};
this.depth = 0;
}
_.extend(Contexter.prototype, {
@ -35,6 +36,9 @@
once: function(obj, cb) {
this.stack.unshift(obj);
if (this.stack.length > 10) {
throw new Error("Maxmimum nesting depth reached");
}
var r = cb(this);
this.stack.shift();
return r;
@ -137,32 +141,6 @@ document
}
document_part
= iterative / descendant / conditional / variable / text
text
= bs:(!tag c:. {return c})+ {
return text(bs);
}
variable "variable"
= t:tag_start rd {
return variable(t);
}
simple_part
= descendant / variable / conditional / text
conditional
= t:ifblock_tag_start ps:simple_part* n:ifblock_tag_end
&{ return (t == n) }
{ return conditional(t, ps); }
ifblock_tag_start "tag_start"
= ld "if:" n:tagname rd
{ return n; }
@ -173,12 +151,6 @@ ifblock_tag_end
{ return n; }
descendant
= t:blockblock_tag_start ps:simple_part* n:blockblock_tag_end
&{ return (t == n) }
{ return descendant(t, ps); }
blockblock_tag_start
= ld "block:" n:tagname rd
{ return n; }
@ -189,13 +161,6 @@ blockblock_tag_end
{ return n; }
iterative
= t:loopblock_tag_start ps:simple_part* n:loopblock_tag_end
&{ return (t == n) }
{
return iterative(t, ps);
}
loopblock_tag_start "tag_start"
= ld "many:" n:tagname rd
{ return n; }
@ -234,6 +199,43 @@ eol
/ "\r"
/ "\u2028"
/ "\u2029"
text
= bs:(!tag c:. {return c})+ {
return text(bs);
}
variable "variable"
= t:tag_start rd {
return variable(t);
}
document_part
= iterative / descendant / conditional / variable / text
simple_part
= descendant / variable / conditional / text
conditional
= t:ifblock_tag_start ps:simple_part* n:ifblock_tag_end
&{ return (t == n) }
{ return conditional(t, ps); }
descendant
= t:blockblock_tag_start ps:simple_part* n:blockblock_tag_end
&{ return (t == n) }
{ return descendant(t, ps); }
iterative
= t:loopblock_tag_start ps:simple_part* n:loopblock_tag_end
&{ return (t == n) }
{ return iterative(t, ps); }

19
test/01_basics_mocha.coffee
View File

@ -2,6 +2,7 @@ chai = require 'chai'
assert = chai.assert
expect = chai.expect
should = chai.should()
util = require 'util'
tumble = require('../lib/tumble').parse;
@ -90,5 +91,21 @@ describe "Basic Functionality", ->
for data in test_data
do (data) ->
it "should work with #{data.description}", ->
r = tumble(data.input)(data.data)
r = tumble(data.input)
r = r(data.data)
r.should.equal data.output
describe "Check for recursion", ->
data = {
'input': '{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{block:a}{a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}{/block:a}',
'output': '',
'data': {'a': {'a': {'a': {'a': {'a': {'a': {'a': {'a': {'a': {'a': {'a': {'a': 'b'}}}}}}}}}}}},
'description': "descent error"
}
do (data) ->
it "should catch an exception", ->
try
r = tumble(data.input)(data.data)
assert.ok false, "It did not throw the exception"
catch err
assert.ok true, "Recursion depth exeception thrown."