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Check if a string is a valid UTF8 sequence. Use the string as it is if it is an UTF8 string, otherwise use hex encoding for the string.

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This commit is contained in:
kevacoin 2021-01-17 21:50:40 -08:00
parent d3e8507182
commit 66f098e436
1 changed files with 40 additions and 2 deletions
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42
src/rpc/rpckeva_nonwallet.cpp
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@ -25,6 +25,30 @@
#include <univalue.h> #include <univalue.h>
#include <boost/xpressive/xpressive_dynamic.hpp> #include <boost/xpressive/xpressive_dynamic.hpp>
#include "../univalue/lib/univalue_utffilter.h"
/**
* Check if the input str is a valid UTF8 string. That is,
* if all the characters are valid UTF8 characters.
*/
static bool isUTF8String(const valtype& str) {
std::string valStr;
JSONUTF8StringFilter writer(valStr);
for (auto x : str) {
writer.push_back(x);
}
return writer.finalize();
}
static std::string ValtypeToHex(const valtype& str) {
std::string hexStr;
for (auto x : str) {
std::ostringstream oss;
oss << std::hex << std::setw(2) << std::setfill('0') << (unsigned)x;
hexStr += oss.str();
}
return hexStr;
}
/** /**
* Utility routine to construct a "keva info" object to return. This is used * Utility routine to construct a "keva info" object to return. This is used
@ -40,8 +64,22 @@ getKevaInfo(const valtype& key, const valtype& value, const COutPoint& outp,
int height, const valtype& nameSpace) int height, const valtype& nameSpace)
{ {
UniValue obj(UniValue::VOBJ); UniValue obj(UniValue::VOBJ);
obj.pushKV("key", ValtypeToString(key)); if (!isUTF8String(key)) {
obj.pushKV("value", ValtypeToString(value)); obj.pushKV("key", ValtypeToHex(key));
obj.pushKV("key_encode", "hex");
} else {
obj.pushKV("key", ValtypeToString(key));
obj.pushKV("key_encode", "utf8");
}
if (!isUTF8String(value)) {
obj.pushKV("value", ValtypeToHex(value));
obj.pushKV("value_encode", "hex");
} else {
obj.pushKV("value", ValtypeToString(value));
obj.pushKV("value_encode", "utf8");
}
obj.pushKV("txid", outp.hash.GetHex()); obj.pushKV("txid", outp.hash.GetHex());
obj.pushKV("vout", static_cast<int>(outp.n)); obj.pushKV("vout", static_cast<int>(outp.n));
obj.pushKV("height", height); obj.pushKV("height", height);