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Emit valid json for unprintable characters

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This commit is contained in:
anoyes 2018-12-20 09:34:02 -08:00
parent cdc7e83993
commit 4b31d209da
1 changed files with 10 additions and 2 deletions
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12
flow/JsonTraceLogFormatter.cpp
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@ -45,14 +45,22 @@ const char* JsonTraceLogFormatter::getFooter() {
namespace {
void escapeString(std::stringstream& ss, const std::string source) {
void escapeString(std::stringstream& ss, const std::string& source) {
for (auto c : source) {
if (c == '"') {
ss << "\\\"";
} else if (c == '\\') {
ss << "\\\\";
} else {
} else if (c == '\n') {
ss << "\\n";
} else if (c == '\r') {
ss << "\\r";
} else if (isprint(c)) {
ss << c;
} else {
constexpr char hex[] = "0123456789abcdef";
int x = int{ static_cast<uint8_t>(c) };
ss << "\\x" << hex[x / 16] << hex[x % 16];
}
}
}