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Fix parsing of empty json objects/arrays and recover parse errors

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Fixes #694
This commit is contained in:
Maxime Coste 2016-06-11 13:41:46 +01:00
parent 3059b3a253
commit 04d24b22bd
1 changed files with 29 additions and 6 deletions
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35
src/json_ui.cc
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@ -295,7 +295,9 @@ parse_json(const char* pos, const char* end)
if (*pos == '[')
{
JsonArray array;
++pos;
if (*++pos == ']')
return Result{std::move(array), pos+1};
while (true)
{
Value element;
@ -317,7 +319,9 @@ parse_json(const char* pos, const char* end)
if (*pos == '{')
{
JsonObject object;
++pos;
if (*++pos == '}')
return Result{std::move(object), pos+1};
while (true)
{
Value name_value;
@ -350,6 +354,9 @@ parse_json(const char* pos, const char* end)
throw runtime_error("Could not parse json");
}
std::tuple<Value, const char*>
parse_json(StringView json) { return parse_json(json.begin(), json.end()); }
void JsonUI::eval_json(const Value& json)
{
const JsonObject& object = json.as<JsonObject>();
@ -418,7 +425,16 @@ void JsonUI::parse_requests(EventMode mode)
{
Value json;
const char* pos;
std::tie(json, pos) = parse_json(m_requests.begin(), m_requests.end());
try
{
std::tie(json, pos) = parse_json(m_requests);
}
catch (runtime_error& error)
{
write_stderr(format("error while parsing requests '{}': '{}'",
m_requests, error.what()));
}
if (json)
{
try
@ -440,9 +456,16 @@ void JsonUI::parse_requests(EventMode mode)
UnitTest test_json_parser{[]()
{
StringView json = R"({ "jsonrpc": "2.0", "method": "keys", "params": [ "b", "l", "a", "h" ] })";
auto value = std::get<0>(parse_json(json.begin(), json.end()));
kak_assert(value);
{
auto value = std::get<0>(parse_json(R"({ "jsonrpc": "2.0", "method": "keys", "params": [ "b", "l", "a", "h" ] })"));
kak_assert(value);
}
{
auto value = std::get<0>(parse_json("{}"));
kak_assert(value and value.is_a<JsonObject>());
kak_assert(value.as<JsonObject>().empty());
}
}};
}