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🐛 proper JSON Pointer escape in diagnostic messages

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This commit is contained in:
Niels Lohmann 2021-01-16 15:33:05 +01:00
parent 7633a21e6c
commit e9d641130d
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GPG Key ID: 7F3CEA63AE251B69
5 changed files with 252 additions and 199 deletions
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3
include/nlohmann/detail/diagnostics_t.hpp
View File

@ -3,6 +3,7 @@
#include <string>
#include <vector>
#include <nlohmann/detail/value_t.hpp>
#include <nlohmann/detail/string_escape.hpp>
namespace nlohmann
{
@ -70,7 +71,7 @@ class diagnostics_t
return "(" + std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
[](const std::string & a, const std::string & b)
{
return a + "/" + b;
return a + "/" + detail::escape(b);
}) + ") ";
#else
return "";

47
include/nlohmann/detail/json_pointer.hpp
View File

@ -11,6 +11,7 @@
#include <nlohmann/detail/diagnostics_t.hpp>
#include <nlohmann/detail/exceptions.hpp>
#include <nlohmann/detail/macro_scope.hpp>
#include <nlohmann/detail/string_escape.hpp>
#include <nlohmann/detail/value_t.hpp>
namespace nlohmann
@ -70,7 +71,7 @@ class json_pointer
std::string{},
[](const std::string & a, const std::string & b)
{
return a + "/" + escape(b);
return a + "/" + detail::escape(b);
});
}
@ -791,53 +792,13 @@ class json_pointer
}
// finally, store the reference token
unescape(reference_token);
detail::unescape(reference_token);
result.push_back(reference_token);
}
return result;
}
/*!
@brief replace all occurrences of a substring by another string
@param[in,out] s the string to manipulate; changed so that all
occurrences of @a f are replaced with @a t
@param[in] f the substring to replace with @a t
@param[in] t the string to replace @a f
@pre The search string @a f must not be empty. **This precondition is
enforced with an assertion.**
@since version 2.0.0
*/
static void replace_substring(std::string& s, const std::string& f,
const std::string& t)
{
JSON_ASSERT(!f.empty());
for (auto pos = s.find(f); // find first occurrence of f
pos != std::string::npos; // make sure f was found
s.replace(pos, f.size(), t), // replace with t, and
pos = s.find(f, pos + t.size())) // find next occurrence of f
{}
}
JSON_PRIVATE_UNLESS_TESTED:
/// escape "~" to "~0" and "/" to "~1"
static std::string escape(std::string s)
{
replace_substring(s, "~", "~0");
replace_substring(s, "/", "~1");
return s;
}
/// unescape "~1" to tilde and "~0" to slash (order is important!)
static void unescape(std::string& s)
{
replace_substring(s, "~1", "/");
replace_substring(s, "~0", "~");
}
private:
/*!
@param[in] reference_string the reference string to the current value
@ -883,7 +844,7 @@ class json_pointer
// iterate object and use keys as reference string
for (const auto& element : *value.m_value.object)
{
flatten(reference_string + "/" + escape(element.first), element.second, result);
flatten(reference_string + "/" + detail::escape(element.first), element.second, result);
}
}
break;

63
include/nlohmann/detail/string_escape.hpp Normal file
View File

@ -0,0 +1,63 @@
#pragma once
#include <string>
#include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
namespace detail
{
/*!
@brief replace all occurrences of a substring by another string
@param[in,out] s the string to manipulate; changed so that all
occurrences of @a f are replaced with @a t
@param[in] f the substring to replace with @a t
@param[in] t the string to replace @a f
@pre The search string @a f must not be empty. **This precondition is
enforced with an assertion.**
@since version 2.0.0
*/
inline void replace_substring(std::string& s, const std::string& f,
const std::string& t)
{
JSON_ASSERT(!f.empty());
for (auto pos = s.find(f); // find first occurrence of f
pos != std::string::npos; // make sure f was found
s.replace(pos, f.size(), t), // replace with t, and
pos = s.find(f, pos + t.size())) // find next occurrence of f
{}
}
/*!
* @brief string escaping as described in RFC 6901 (Sect. 4)
* @param[in] s string to escape
* @return escaped string
*
* Note the order of escaping "~" to "~0" and "/" to "~1" is important.
*/
inline std::string escape(std::string s)
{
replace_substring(s, "~", "~0");
replace_substring(s, "/", "~1");
return s;
}
/*!
* @brief string unescaping as described in RFC 6901 (Sect. 4)
* @param[in] s string to unescape
* @return unescaped string
*
* Note the order of escaping "~1" to "/" and "~0" to "~" is important.
*/
static void unescape(std::string& s)
{
replace_substring(s, "~1", "/");
replace_substring(s, "~0", "~");
}
} // namespace detail
} // namespace nlohmann

4
include/nlohmann/json.hpp
View File

@ -8651,7 +8651,7 @@ class basic_json
for (auto it = source.cbegin(); it != source.cend(); ++it)
{
// escape the key name to be used in a JSON patch
const auto key = json_pointer::escape(it.key());
const auto key = detail::escape(it.key());
if (target.find(it.key()) != target.end())
{
@ -8675,7 +8675,7 @@ class basic_json
if (source.find(it.key()) == source.end())
{
// found a key that is not in this -> add it
const auto key = json_pointer::escape(it.key());
const auto key = detail::escape(it.key());
result.push_back(
{
{"op", "add"}, {"path", path + "/" + key},

334
single_include/nlohmann/json.hpp
View File

@ -161,116 +161,10 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
} // namespace detail
} // namespace nlohmann
namespace nlohmann
{
namespace detail
{
template<typename BasicJsonType>
class diagnostics_t
{
public:
diagnostics_t() noexcept = default;
diagnostics_t(const BasicJsonType& j) noexcept
: m_j(&j)
{}
std::string diagnostics() const
{
#if JSON_DIAGNOSTICS
if (m_j == nullptr)
{
return "";
}
std::vector<std::string> tokens;
for (const auto* current = m_j; current->m_parent != nullptr; current = current->m_parent)
{
switch (current->m_parent->type())
{
case value_t::array:
{
for (std::size_t i = 0; i < current->m_parent->m_value.array->size(); ++i)
{
if (current->m_parent->m_value.array->operator[](i) == *current)
{
tokens.emplace_back(std::to_string(i));
continue;
}
}
break;
}
case value_t::object:
{
for (const auto& element : *current->m_parent->m_value.object)
{
if (element.second == *current)
{
tokens.emplace_back(element.first.c_str());
continue;
}
}
break;
}
default:
break;
}
}
if (tokens.empty())
{
return "";
}
return "(" + std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
[](const std::string & a, const std::string & b)
{
return a + "/" + b;
}) + ") ";
#else
return "";
#endif
}
private:
const BasicJsonType* m_j = static_cast<const BasicJsonType*>(nullptr);
};
} // namespace detail
} // namespace nlohmann
// #include <nlohmann/detail/input/position_t.hpp>
// #include <nlohmann/detail/string_escape.hpp>
#include <cstddef> // size_t
namespace nlohmann
{
namespace detail
{
/// struct to capture the start position of the current token
struct position_t
{
/// the total number of characters read
std::size_t chars_read_total = 0;
/// the number of characters read in the current line
std::size_t chars_read_current_line = 0;
/// the number of lines read
std::size_t lines_read = 0;
/// conversion to size_t to preserve SAX interface
constexpr operator size_t() const
{
return chars_read_total;
}
};
} // namespace detail
} // namespace nlohmann
#include <string>
// #include <nlohmann/detail/macro_scope.hpp>
@ -2549,6 +2443,178 @@ JSON_HEDLEY_DIAGNOSTIC_POP
#endif
namespace nlohmann
{
namespace detail
{
/*!
@brief replace all occurrences of a substring by another string
@param[in,out] s the string to manipulate; changed so that all
occurrences of @a f are replaced with @a t
@param[in] f the substring to replace with @a t
@param[in] t the string to replace @a f
@pre The search string @a f must not be empty. **This precondition is
enforced with an assertion.**
@since version 2.0.0
*/
inline void replace_substring(std::string& s, const std::string& f,
const std::string& t)
{
JSON_ASSERT(!f.empty());
for (auto pos = s.find(f); // find first occurrence of f
pos != std::string::npos; // make sure f was found
s.replace(pos, f.size(), t), // replace with t, and
pos = s.find(f, pos + t.size())) // find next occurrence of f
{}
}
/*!
* @brief string escaping as described in RFC 6901 (Sect. 4)
* @param[in] s string to escape
* @return escaped string
*
* Note the order of escaping "~" to "~0" and "/" to "~1" is important.
*/
inline std::string escape(std::string s)
{
replace_substring(s, "~", "~0");
replace_substring(s, "/", "~1");
return s;
}
/*!
* @brief string unescaping as described in RFC 6901 (Sect. 4)
* @param[in] s string to unescape
* @return unescaped string
*
* Note the order of escaping "~1" to "/" and "~0" to "~" is important.
*/
static void unescape(std::string& s)
{
replace_substring(s, "~1", "/");
replace_substring(s, "~0", "~");
}
} // namespace detail
} // namespace nlohmann
namespace nlohmann
{
namespace detail
{
template<typename BasicJsonType>
class diagnostics_t
{
public:
diagnostics_t() noexcept = default;
diagnostics_t(const BasicJsonType& j) noexcept
: m_j(&j)
{}
std::string diagnostics() const
{
#if JSON_DIAGNOSTICS
if (m_j == nullptr)
{
return "";
}
std::vector<std::string> tokens;
for (const auto* current = m_j; current->m_parent != nullptr; current = current->m_parent)
{
switch (current->m_parent->type())
{
case value_t::array:
{
for (std::size_t i = 0; i < current->m_parent->m_value.array->size(); ++i)
{
if (current->m_parent->m_value.array->operator[](i) == *current)
{
tokens.emplace_back(std::to_string(i));
continue;
}
}
break;
}
case value_t::object:
{
for (const auto& element : *current->m_parent->m_value.object)
{
if (element.second == *current)
{
tokens.emplace_back(element.first.c_str());
continue;
}
}
break;
}
default:
break;
}
}
if (tokens.empty())
{
return "";
}
return "(" + std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
[](const std::string & a, const std::string & b)
{
return a + "/" + detail::escape(b);
}) + ") ";
#else
return "";
#endif
}
private:
const BasicJsonType* m_j = static_cast<const BasicJsonType*>(nullptr);
};
} // namespace detail
} // namespace nlohmann
// #include <nlohmann/detail/input/position_t.hpp>
#include <cstddef> // size_t
namespace nlohmann
{
namespace detail
{
/// struct to capture the start position of the current token
struct position_t
{
/// the total number of characters read
std::size_t chars_read_total = 0;
/// the number of characters read in the current line
std::size_t chars_read_current_line = 0;
/// the number of lines read
std::size_t lines_read = 0;
/// conversion to size_t to preserve SAX interface
constexpr operator size_t() const
{
return chars_read_total;
}
};
} // namespace detail
} // namespace nlohmann
// #include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
namespace detail
@ -11798,6 +11864,8 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
// #include <nlohmann/detail/macro_scope.hpp>
// #include <nlohmann/detail/string_escape.hpp>
// #include <nlohmann/detail/value_t.hpp>
@ -11858,7 +11926,7 @@ class json_pointer
std::string{},
[](const std::string & a, const std::string & b)
{
return a + "/" + escape(b);
return a + "/" + detail::escape(b);
});
}
@ -12579,53 +12647,13 @@ class json_pointer
}
// finally, store the reference token
unescape(reference_token);
detail::unescape(reference_token);
result.push_back(reference_token);
}
return result;
}
/*!
@brief replace all occurrences of a substring by another string
@param[in,out] s the string to manipulate; changed so that all
occurrences of @a f are replaced with @a t
@param[in] f the substring to replace with @a t
@param[in] t the string to replace @a f
@pre The search string @a f must not be empty. **This precondition is
enforced with an assertion.**
@since version 2.0.0
*/
static void replace_substring(std::string& s, const std::string& f,
const std::string& t)
{
JSON_ASSERT(!f.empty());
for (auto pos = s.find(f); // find first occurrence of f
pos != std::string::npos; // make sure f was found
s.replace(pos, f.size(), t), // replace with t, and
pos = s.find(f, pos + t.size())) // find next occurrence of f
{}
}
JSON_PRIVATE_UNLESS_TESTED:
/// escape "~" to "~0" and "/" to "~1"
static std::string escape(std::string s)
{
replace_substring(s, "~", "~0");
replace_substring(s, "/", "~1");
return s;
}
/// unescape "~1" to tilde and "~0" to slash (order is important!)
static void unescape(std::string& s)
{
replace_substring(s, "~1", "/");
replace_substring(s, "~0", "~");
}
private:
/*!
@param[in] reference_string the reference string to the current value
@ -12671,7 +12699,7 @@ class json_pointer
// iterate object and use keys as reference string
for (const auto& element : *value.m_value.object)
{
flatten(reference_string + "/" + escape(element.first), element.second, result);
flatten(reference_string + "/" + detail::escape(element.first), element.second, result);
}
}
break;
@ -25406,7 +25434,7 @@ class basic_json
for (auto it = source.cbegin(); it != source.cend(); ++it)
{
// escape the key name to be used in a JSON patch
const auto key = json_pointer::escape(it.key());
const auto key = detail::escape(it.key());
if (target.find(it.key()) != target.end())
{
@ -25430,7 +25458,7 @@ class basic_json
if (source.find(it.key()) == source.end())
{
// found a key that is not in this -> add it
const auto key = json_pointer::escape(it.key());
const auto key = detail::escape(it.key());
result.push_back(
{
{"op", "add"}, {"path", path + "/" + key},