160811 2016-08-12 12:09:10 -0700 Initial URLParser implementation 2016-08-19 11:38:19 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 achristensen achristensen beidson darin oldest_to_newest 1219640 0 achristensen 2016-08-12 12:09:10 -0700 Initial URLParser implementation 1219641 1 285926 achristensen 2016-08-12 12:09:58 -0700 Created attachment 285926 Patch 1219647 2 285926 beidson 2016-08-12 12:26:27 -0700 Comment on attachment 285926 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=285926&action=review r+ is contingent on fixing the buffer safety issues. > Source/WebCore/platform/URLParser.cpp:40 > +static bool isC0Control(const StringView::CodePoints::Iterator& c) { return *c <= 0x001F; } > +static bool isC0ControlOrSpace(const StringView::CodePoints::Iterator& c) { return isC0Control(c) || *c == 0x0020; } > +static bool isTabOrNewline(const StringView::CodePoints::Iterator& c) { return *c == 0x0009 || *c == 0x000A || *c == 0x000D; } > +static bool isASCIIDigit(const StringView::CodePoints::Iterator& c) { return *c >= 0x0030 && *c <= 0x0039; } > +static bool isASCIIAlpha(const StringView::CodePoints::Iterator& c) { return (*c >= 0x0041 && *c <= 0x005A) || (*c >= 0x0061 && *c <= 0x007A); } > +static bool isASCIIAlphanumeric(const StringView::CodePoints::Iterator& c) { return isASCIIDigit(c) || isASCIIAlpha(c); } Do we seriously not have any of these things anywhere else? > Source/WebCore/platform/URLParser.cpp:55 > +// 4.2. URL parsing > +Optional<URL> URLParser::parse(const String& input, const URL& base, const TextEncoding&) This comment literally repeats what the code on the line below it already says. Not sure it's useful. > Source/WebCore/platform/URLParser.cpp:69 > + SchemeEndCheckForSlashes, // Not explicitly in spec, but in scheme state steps 2. 8. Not sure this comment is useful/helpful. > Source/WebCore/platform/URLParser.cpp:117 > + if (urlScheme == "file") ASCIILiteral > Source/WebCore/platform/URLParser.cpp:153 > + ++c; > + if (*c == '/') { Deref'ing c after incrementing it without checking for end. :( > Source/WebCore/platform/URLParser.cpp:181 > + ++c; > + buffer.append('/'); > + if (*c == '/') { Deref'ing c after incrementing it without checking for end. :( > Source/WebCore/platform/URLParser.cpp:275 > + if (*c == '/') { > + ++c; > + if (*c == '.') { > + ++c; > + if (*c == '.') > + notImplemented(); Deref'ing c after incrementing it without checking for end. :( 1219648 3 beidson 2016-08-12 12:26:39 -0700 And making the build work. 1219663 4 achristensen 2016-08-12 12:56:44 -0700 (In reply to comment #2) > Do we seriously not have any of these things anywhere else? We probably do, but not ones that take these iterators. We can probably consolidate this code later. > > Source/WebCore/platform/URLParser.cpp:69 > > + SchemeEndCheckForSlashes, // Not explicitly in spec, but in scheme state steps 2. 8. > > Not sure this comment is useful/helpful. It is. All the other states are specified in the spec. This one is not. > ASCIILiteral That doesn't compile. This whole case needs to be rewritten anyways, hence the comment. 1219664 5 285934 achristensen 2016-08-12 12:57:30 -0700 Created attachment 285934 Patch 1219671 6 achristensen 2016-08-12 13:05:32 -0700 http://trac.webkit.org/changeset/204417 1219744 7 beidson 2016-08-12 15:32:19 -0700 (In reply to comment #4) > (In reply to comment #2) > > Do we seriously not have any of these things anywhere else? > We probably do, but not ones that take these iterators. We can probably > consolidate this code later. > > > Source/WebCore/platform/URLParser.cpp:69 > > > + SchemeEndCheckForSlashes, // Not explicitly in spec, but in scheme state steps 2. 8. > > > > Not sure this comment is useful/helpful. > It is. All the other states are specified in the spec. This one is not. I understand that, because that's what the comment says. I just don't see how it's relevant here. There should be a relatively high bar to breaking up source code with comments, and it's usually when the code doesn't explain itself. This name explains itself. > > ASCIILiteral > That doesn't compile. This whole case needs to be rewritten anyways, hence > the comment. Weird, why not? 1219748 8 achristensen 2016-08-12 15:38:20 -0700 > > > ASCIILiteral > > That doesn't compile. This whole case needs to be rewritten anyways, hence > > the comment. > > Weird, why not? /Users/alexchristensen/code/OpenSource/Source/WebCore/platform/URLParser.cpp:115:31: error: use of overloaded operator '==' is ambiguous (with operand types 'WTF::String' and 'WTF::ASCIILiteral') if (urlScheme == ASCIILiteral("file")) ~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~ In file included from /Users/alexchristensen/code/OpenSource/Source/WebCore/platform/URLParser.cpp:27: In file included from /Users/alexchristensen/code/OpenSource/Source/WebCore/platform/URLParser.h:28: In file included from /Users/alexchristensen/code/OpenSource/Source/WebCore/platform/text/TextEncoding.h:29: In file included from /Users/alexchristensen/code/OpenSource/Source/WebCore/platform/text/TextCodec.h:34: /Users/alexchristensen/code/OpenSource/WebKitBuild/Debug/usr/local/include/wtf/text/WTFString.h:481:13: note: candidate function inline bool operator==(const String& a, const String& b) { return equal(a.impl(), b.impl()); } ^ /Users/alexchristensen/code/OpenSource/WebKitBuild/Debug/usr/local/include/wtf/text/WTFString.h:483:13: note: candidate function inline bool operator==(const String& a, const char* b) { return equal(a.impl(), reinterpret_cast<const LChar*>(b)); } 1220387 9 darin 2016-08-15 23:38:48 -0700 How is this different from the algorithms inside URL.cpp? 1220492 10 achristensen 2016-08-16 10:54:09 -0700 The new URLParser will be more standards compliant. It is designed around one finite state machine that looks more like the spec, so as the spec evolves it will be easier to make changes to keep up. It uses code point iterators to ideally just go through the URL once instead of making several copies and looking at different parts of the input multiple times. The character class table and percent encode table in URL.cpp are wrong. There are a growing number of security bugs based on the way the current parser works. I decided it would be better to just start from scratch instead of trying to massage the old URL parser into a new one. 1221109 11 darin 2016-08-18 10:35:42 -0700 (In reply to comment #10) > The new URLParser will be more standards compliant. > It is designed around one finite state machine that looks more like the > spec, so as the spec evolves it will be easier to make changes to keep up. > It uses code point iterators to ideally just go through the URL once instead > of making several copies and looking at different parts of the input > multiple times. > The character class table and percent encode table in URL.cpp are wrong. > There are a growing number of security bugs based on the way the current > parser works. I decided it would be better to just start from scratch > instead of trying to massage the old URL parser into a new one. All that makes sense. But I don’t think it’s OK to end up having two URL parsers. How can we make sure we get rid of the old one? 1221410 12 achristensen 2016-08-19 11:38:19 -0700 I plan to develop the new one as the URLParser class until it is good enough to replace the URL::parse and URL::init functions, then replace those functions with the code I'm developing now. 285926 2016-08-12 12:09:58 -0700 2016-08-12 12:57:28 -0700 Patch bug-160811-20160812120818.patch text/plain 12773 achristensen SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDIwNDM4MCkKKysrIFNvdXJjZS9XZWJDb3JlL0NoYW5n ZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDIyIEBACisyMDE2LTA4LTEyICBBbGV4IENo cmlzdGVuc2VuICA8YWNocmlzdGVuc2VuQHdlYmtpdC5vcmc+CisKKyAgICAgICAgSW5pdGlhbCBV UkxQYXJzZXIgaW1wbGVtZW50YXRpb24KKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcv c2hvd19idWcuY2dpP2lkPTE2MDgxMQorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09Q 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