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#include "json-partial.h"
#include "log.h"
#include <nlohmann/json.hpp>
#include <string>
using json = nlohmann::ordered_json;
enum common_json_stack_element_type {
COMMON_JSON_STACK_ELEMENT_OBJECT,
COMMON_JSON_STACK_ELEMENT_KEY,
COMMON_JSON_STACK_ELEMENT_ARRAY,
};
struct common_json_stack_element {
common_json_stack_element_type type;
std::string key;
};
bool common_json_parse(
const std::string & input,
const std::string & healing_marker,
common_json & out)
{
std::string::const_iterator it = input.begin();
const auto end = input.end();
return common_json_parse(it, end, healing_marker, out);
}
bool common_json_parse(
std::string::const_iterator & it,
const std::string::const_iterator & end,
const std::string & healing_marker,
common_json & out)
{
// // https://json.nlohmann.me/features/parsing/sax_interface/
struct json_error_locator : public nlohmann::json_sax<json> {
std::size_t position;
bool found_error;
std::string last_token;
std::string exception_message;
std::vector<common_json_stack_element> stack;
json_error_locator() : position(0), found_error(false) {}
bool parse_error(std::size_t position, const std::string & last_token, const json::exception & ex) override { // NOLINT
this->position = position - 1;
this->found_error = true;
this->last_token = last_token;
this->exception_message = ex.what();
return false;
}
void close_value() {
if (!stack.empty() && (stack.back().type == COMMON_JSON_STACK_ELEMENT_KEY)) {
stack.pop_back();
}
}
bool null() override { // NOLINT
close_value();
return true;
}
bool boolean(bool) override { // NOLINT
close_value();
return true;
}
bool number_integer(number_integer_t) override { // NOLINT
close_value();
return true;
}
bool number_unsigned(number_unsigned_t) override { // NOLINT
close_value();
return true;
}
bool number_float(number_float_t, const string_t &) override { // NOLINT
close_value();
return true;
}
bool string(string_t &) override { // NOLINT
close_value();
return true;
}
bool binary(binary_t &) override { // NOLINT
close_value();
return true;
}
bool start_object(std::size_t) override { // NOLINT
stack.push_back({COMMON_JSON_STACK_ELEMENT_OBJECT, ""});
return true;
}
bool end_object() override {
GGML_ASSERT(!stack.empty() && stack.back().type == COMMON_JSON_STACK_ELEMENT_OBJECT);
stack.pop_back();
close_value();
return true;
}
bool key(string_t & key) override { // NOLINT
stack.push_back({COMMON_JSON_STACK_ELEMENT_KEY, key});
return true;
}
bool start_array(std::size_t) override { // NOLINT
stack.push_back({COMMON_JSON_STACK_ELEMENT_ARRAY, ""});
return true;
}
bool end_array() override {
GGML_ASSERT(!stack.empty() && stack.back().type == COMMON_JSON_STACK_ELEMENT_ARRAY);
stack.pop_back();
close_value();
return true;
}
};
json_error_locator err_loc;
auto start = it;
json::sax_parse(it, end, &err_loc);
if (err_loc.found_error) {
it = start;
auto temptative_end = it + err_loc.position;
// LOG_DBG("Error at position %zu (is_end = %s): %s\n", err_loc.position, temptative_end == end ? "true" : "false", err_loc.exception_message.c_str());
auto input = std::string(it, temptative_end);
try {
out.json = json::parse(input);
// out.json = json::parse(it, temptative_end);
it = temptative_end;
return true;
} catch (const std::exception & ex) {
// No, needs healing.
LOG_DBG("Failed to parse up to error: %s: <<<%s>>>\n", ex.what(), std::string(it, temptative_end).c_str());
}
auto can_parse = [](const std::string & str) {
try {
auto _ = json::parse(str); // NOLINT
return true;
} catch (const std::exception &) {
return false;
}
};
if (!healing_marker.empty() && !err_loc.stack.empty()) {
std::string str(it, temptative_end);
auto last_non_sp_pos = str.find_last_not_of(" \n\r\t");
if (last_non_sp_pos == std::string::npos) {
throw std::runtime_error("Cannot heal a truncated JSON that stopped in an unknown location");
}
auto last_non_sp_char = str[last_non_sp_pos];
// Used to detect stops on a number, which may not be complete.
auto was_maybe_number = [&]() {
if (!str.empty() && std::isspace(str.back())) {
return false;
}
return std::isdigit(last_non_sp_char) ||
last_non_sp_char == '.' ||
last_non_sp_char == 'e' ||
last_non_sp_char == 'E' ||
last_non_sp_char == '-';
};
std::string closing;
for (size_t i = err_loc.stack.size(); i > 0; i--) {
auto & el = err_loc.stack[i - 1];
if (el.type == COMMON_JSON_STACK_ELEMENT_OBJECT) {
closing += "}";
} else if (el.type == COMMON_JSON_STACK_ELEMENT_ARRAY) {
closing += "]";
} else if (el.type != COMMON_JSON_STACK_ELEMENT_KEY) {
throw std::runtime_error("Unexpected stack element type");
}
}
const auto & magic_seed = out.healing_marker.marker = healing_marker;//"$llama.cpp.json$";
if (err_loc.stack.back().type == COMMON_JSON_STACK_ELEMENT_KEY) {
// We're inside an object value
if (last_non_sp_char == ':' && can_parse(str + "1" + closing)) {
// Was about to create an object value
str += (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\"" + closing;
} else if (can_parse(str + ": 1" + closing)) {
str += (out.healing_marker.json_dump_marker = ":\"" + magic_seed) + "\"" + closing;
} else if (last_non_sp_char == '{' && can_parse(str + closing)) {
// Was about to create an object
str += (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\": 1" + closing;
} else if (can_parse(str + "\"" + closing)) {
// Was inside an object value string
str += (out.healing_marker.json_dump_marker = magic_seed) + "\"" + closing;
} else if (str[str.length() - 1] == '\\' && can_parse(str + "\\\"" + closing)) {
// Was inside an object value string after an escape
str += (out.healing_marker.json_dump_marker = "\\" + magic_seed) + "\"" + closing;
} else {
// find last :
auto last_pos = str.find_last_of(':');
if (last_pos == std::string::npos) {
throw std::runtime_error("Cannot heal a truncated JSON that stopped in an unknown location");
}
// Cutting back to opening : for object value
str = str.substr(0, last_pos + 1) + (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\"" + closing;
}
} else if (err_loc.stack.back().type == COMMON_JSON_STACK_ELEMENT_ARRAY) {
if ((last_non_sp_char == ',' || last_non_sp_char == '[') && can_parse(str + "1" + closing)) {
// Was about to create an array value
str += (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\"" + closing;
} else if (can_parse(str + "\"" + closing)) {
// Was inside an array value string
str += (out.healing_marker.json_dump_marker = magic_seed) + "\"" + closing;
} else if (str[str.length() - 1] == '\\' && can_parse(str + "\\\"" + closing)) {
// Was inside an array value string after an escape
str += (out.healing_marker.json_dump_marker = "\\" + magic_seed) + "\"" + closing;
} else if (!was_maybe_number() && can_parse(str + ", 1" + closing)) {
// Had just finished a value
str += (out.healing_marker.json_dump_marker = ",\"" + magic_seed) + "\"" + closing;
} else {
auto last_pos = str.find_last_of("[,");
if (last_pos == std::string::npos) {
throw std::runtime_error("Cannot heal a truncated JSON array stopped in an unknown location");
}
// Cutting back to last [ or , for array value
str = str.substr(0, last_pos + 1) + (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\"" + closing;
}
} else if (err_loc.stack.back().type == COMMON_JSON_STACK_ELEMENT_OBJECT) {
if ((last_non_sp_char == '{' && can_parse(str + closing)) ||
(last_non_sp_char == ',' && can_parse(str + "\"\": 1" + closing))) {
// Was about to create an object key+value
str += (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\": 1" + closing;
} else if (!was_maybe_number() && can_parse(str + ",\"\": 1" + closing)) {
// Was about to create an object key+value
str += (out.healing_marker.json_dump_marker = ",\"" + magic_seed) + "\": 1" + closing;
} else if (can_parse(str + "\": 1" + closing)) {
// Was inside an object key string
str += (out.healing_marker.json_dump_marker = magic_seed) + "\": 1" + closing;
} else if (str[str.length() - 1] == '\\' && can_parse(str + "\\\": 1" + closing)) {
// Was inside an object key string after an escape
str += (out.healing_marker.json_dump_marker = "\\" + magic_seed) + "\": 1" + closing;
} else {
auto last_pos = str.find_last_of(':');
if (last_pos == std::string::npos) {
throw std::runtime_error("Cannot heal a truncated JSON object stopped in an unknown location");
}
// fprintf(stderr, "Cutting back to last : for object key+value\n");
str = str.substr(0, last_pos + 1) + (out.healing_marker.json_dump_marker = "\"" + magic_seed) + "\"" + closing;
}
} else {
throw std::runtime_error("Cannot heal a truncated JSON object stopped in an unknown location");
}
// fprintf(stderr, "HEALED:\nSTRING <<<\n%s\n>>>\n\nmagic_cut: <<<\n%s\n>>>\n\n", str.c_str(), out.healing_marker.json_dump_marker.c_str());
out.json = json::parse(str);
it = temptative_end;
return true;
}
// TODO: handle unclosed top-level primitive if the stack was empty but we got an error (e.g. "tru", "\"", etc...)
// fprintf(stderr, "Closing: TODO\n");
return false;
}
out.json = json::parse(it, end);
it = end;
return true;
}
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