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Add parsing of URI fragment representation of JSON pointer

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This commit is contained in:
miloyip 2015-05-03 09:51:15 +08:00
parent 2ee15de4a9
commit 28f14bd68f
2 changed files with 220 additions and 2 deletions
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44
include/rapidjson/pointer.h
View File

@ -25,7 +25,9 @@ enum PointerParseErrorCode {
kPointerParseErrorNone = 0,
kPointerParseErrorTokenMustBeginWithSolidus,
kPointerParseErrorInvalidEscape
kPointerParseErrorInvalidEscape,
kPointerParseErrorInvalidPercentEncoding,
kPointerParseErrorCharacterMustPercentEncode
};
template <typename ValueType, typename Allocator = CrtAllocator>
@ -363,6 +365,12 @@ public:
}
private:
//! Parse a JSON String or its URI fragment representation into tokens.
/*!
\param source Either a JSON Pointer string, or its URI fragment representation. Not need to be null terminated.
\param length Length of the source string.
\note Source cannot be JSON String Representation of JSON Pointer, e.g. In "/\u0000", \u0000 will not be unescaped.
*/
void Parse(const Ch* source, size_t length) {
// Create own allocator if user did not supply.
if (!allocator_)
@ -380,7 +388,14 @@ private:
size_t i = 0;
if (length != 0 && source[i] != '/') {
// Detect if it is a URI fragment
bool uriFragment = false;
if (source[i] == '#') {
uriFragment = true;
i++;
}
if (i != length && source[i] != '/') {
parseErrorCode_ = kPointerParseErrorTokenMustBeginWithSolidus;
goto error;
}
@ -395,6 +410,31 @@ private:
while (i < length && source[i] != '/') {
Ch c = source[i++];
if (uriFragment) {
// Decoding percent-encoding for URI fragment
if (c == '%') {
c = 0;
for (int j = 0; j < 2; j++) {
c <<= 4;
Ch h = source[i];
if (h >= '0' && h <= '9') c += h - '0';
else if (h >= 'A' && h <= 'F') c += h - 'A' + 10;
else if (h >= 'a' && h <= 'f') c += h - 'a' + 10;
else {
parseErrorCode_ = kPointerParseErrorInvalidPercentEncoding;
goto error;
}
i++;
}
}
else if (!((c >= '0' && c <= '9') || (c >= 'A' && c <='Z') || (c >= 'a' && c <= 'z') || c == '-' || c == '.' || c == '_' || c =='~')) {
// RFC 3986 2.3 Unreserved Characters
i--;
parseErrorCode_ = kPointerParseErrorCharacterMustPercentEncode;
goto error;
}
}
// Escaping "~0" -> '~', "~1" -> '/'
if (c == '~') {

178
test/unittest/pointertest.cpp
View File

@ -165,6 +165,184 @@ TEST(Pointer, Parse) {
}
}
TEST(Pointer, Parse_URIFragment) {
{
Pointer p("#");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(0u, p.GetTokenCount());
}
{
Pointer p("#/foo");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_EQ(3u, p.GetTokens()[0].length);
EXPECT_STREQ("foo", p.GetTokens()[0].name);
}
{
Pointer p("#/foo/0");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(2u, p.GetTokenCount());
EXPECT_EQ(3u, p.GetTokens()[0].length);
EXPECT_STREQ("foo", p.GetTokens()[0].name);
EXPECT_EQ(1u, p.GetTokens()[1].length);
EXPECT_STREQ("0", p.GetTokens()[1].name);
EXPECT_EQ(0u, p.GetTokens()[1].index);
}
{
// Unescape ~1
Pointer p("#/a~1b");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_EQ(3u, p.GetTokens()[0].length);
EXPECT_STREQ("a/b", p.GetTokens()[0].name);
}
{
// Unescape ~0
Pointer p("#/m~0n");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_EQ(3u, p.GetTokens()[0].length);
EXPECT_STREQ("m~n", p.GetTokens()[0].name);
}
{
// empty name
Pointer p("#/");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_EQ(0u, p.GetTokens()[0].length);
EXPECT_STREQ("", p.GetTokens()[0].name);
}
{
// empty and non-empty name
Pointer p("#//a");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(2u, p.GetTokenCount());
EXPECT_EQ(0u, p.GetTokens()[0].length);
EXPECT_STREQ("", p.GetTokens()[0].name);
EXPECT_EQ(1u, p.GetTokens()[1].length);
EXPECT_STREQ("a", p.GetTokens()[1].name);
}
{
// Null characters
Pointer p("#/%00%00");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_EQ(2u, p.GetTokens()[0].length);
EXPECT_EQ('\0', p.GetTokens()[0].name[0]);
EXPECT_EQ('\0', p.GetTokens()[0].name[1]);
EXPECT_EQ('\0', p.GetTokens()[0].name[2]);
}
{
// Percentage Escapes
EXPECT_STREQ("c%d", Pointer("#/c%25d").GetTokens()[0].name);
EXPECT_STREQ("e^f", Pointer("#/e%5Ef").GetTokens()[0].name);
EXPECT_STREQ("g|h", Pointer("#/g%7Ch").GetTokens()[0].name);
EXPECT_STREQ("i\\j", Pointer("#/i%5Cj").GetTokens()[0].name);
EXPECT_STREQ("k\"l", Pointer("#/k%22l").GetTokens()[0].name);
EXPECT_STREQ(" ", Pointer("#/%20").GetTokens()[0].name);
}
{
// Valid index
Pointer p("#/123");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_STREQ("123", p.GetTokens()[0].name);
EXPECT_EQ(123u, p.GetTokens()[0].index);
}
{
// Invalid index (with leading zero)
Pointer p("#/01");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_STREQ("01", p.GetTokens()[0].name);
EXPECT_EQ(kPointerInvalidIndex, p.GetTokens()[0].index);
}
if (sizeof(SizeType) == 4) {
// Invalid index (overflow)
Pointer p("#/4294967296");
EXPECT_TRUE(p.IsValid());
EXPECT_EQ(1u, p.GetTokenCount());
EXPECT_STREQ("4294967296", p.GetTokens()[0].name);
EXPECT_EQ(kPointerInvalidIndex, p.GetTokens()[0].index);
}
{
// kPointerParseErrorTokenMustBeginWithSolidus
Pointer p("# ");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorTokenMustBeginWithSolidus, p.GetParseErrorCode());
EXPECT_EQ(1u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorInvalidEscape
Pointer p("#/~");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorInvalidEscape, p.GetParseErrorCode());
EXPECT_EQ(3u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorInvalidEscape
Pointer p("#/~2");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorInvalidEscape, p.GetParseErrorCode());
EXPECT_EQ(3u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorInvalidPercentEncoding
Pointer p("#/%");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorInvalidPercentEncoding, p.GetParseErrorCode());
EXPECT_EQ(3u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorInvalidPercentEncoding
Pointer p("#/%g0");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorInvalidPercentEncoding, p.GetParseErrorCode());
EXPECT_EQ(3u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorInvalidPercentEncoding
Pointer p("#/%0g");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorInvalidPercentEncoding, p.GetParseErrorCode());
EXPECT_EQ(4u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorCharacterMustPercentEncode
Pointer p("#/ ");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorCharacterMustPercentEncode, p.GetParseErrorCode());
EXPECT_EQ(2u, p.GetParseErrorOffset());
}
{
// kPointerParseErrorCharacterMustPercentEncode
Pointer p("#/\\");
EXPECT_FALSE(p.IsValid());
EXPECT_EQ(kPointerParseErrorCharacterMustPercentEncode, p.GetParseErrorCode());
EXPECT_EQ(2u, p.GetParseErrorOffset());
}
}
TEST(Pointer, Stringify) {
// Test by roundtrip
const char* sources[] = {