avoid malformed json

[whitecloud-sas]

Hello!

if I deliver a malformed string like {"key1":"val1", "key.... it crashes at json j_complete = json::parse(v_string); line, exists something to check this before parse? thanks!

[nlohmann]

No, the parser does this check. But you can catch the exception that is thrown in case of a parse error.

[nlohmann]

@whitecloud-sas Does this help you?

[whitecloud-sas]

Yes, this is what I did:

try {
json object;
auto text = str;
std::stringstream ss;
ss << text;
json j_complete = json::parse(ss);
object = j_complete;
auto key = object.find("key");
if (*key== "value") {
//do something
}
} catch (const std::invalid_argument&) {
// parsing a JSON serialization must not fail
printf("JSON malformed %s\n", str.c_str());
}

Thanks @nlohmann

[nlohmann]

Note with #301 we shall add diagnosis information to the exceptions so you can provide the user the location in the JSON text that led to the error.