Fix parquet-reader outputting invalid json#72

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al13n321 wants to merge 2 commits into from
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Fix parquet-reader outputting invalid json #72

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e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all \u003cpre\u003e\u003ccode\u003e blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks"); } } catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); } })(); (function(){ try { var __m = "github.com"; var __re = new RegExp('^' + "github\\.com" + '
Skip to content

Fix parquet-reader outputting invalid json#72

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Closed
al13n321 wants to merge 2 commits into from
Closed

Fix parquet-reader outputting invalid json #72

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e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Fix parquet-reader outputting invalid json#72

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Closed
al13n321 wants to merge 2 commits into from
Closed

Fix parquet-reader outputting invalid json #72

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e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length \u003e 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Fix parquet-reader outputting invalid json#72

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Closed
al13n321 wants to merge 2 commits into from
Closed

Fix parquet-reader outputting invalid json #72

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e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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Fix parquet-reader outputting invalid json#72

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Closed
al13n321 wants to merge 2 commits into from
Closed

Fix parquet-reader outputting invalid json #72

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e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })();
Skip to content

Fix parquet-reader outputting invalid json#72

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
al13n321 wants to merge 2 commits into from
Closed

Fix parquet-reader outputting invalid json #72

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
e4efa2d
Fix parquet-reader outputting invalid json
al13n321 Sep 26, 2025
c4a1ea2
Escape strings
al13n321 Sep 26, 2025
File filter

Filter by extension

Filter by extension
Conversations
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Loading
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30 changes: 18 additions & 12 deletions cpp/src/parquet/printer.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -281,21 +281,27 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
<< "\"StatsSet\": ";
if (column_chunk->is_stats_set()) {
stream << "\"True\", \"Stats\": {";
bool comma = false;
if (stats->HasNullCount()) {
stream << "\"NumNulls\": \"" << stats->null_count();
comma = true;
stream << "\"NumNulls\": \"" << stats->null_count() << "\"";
}
if (stats->HasDistinctCount()) {
stream << "\", "
<< "\"DistinctValues\": \"" << stats->distinct_count();
if (comma)
stream << ", ";
comma = true;
stream << "\"DistinctValues\": \"" << stats->distinct_count() << "\"";
}
if (stats->HasMinMax()) {
if (comma)
stream << ", ";
comma = true;
std::string min = stats->EncodeMin(), max = stats->EncodeMax();
stream << "\", "
<< "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
stream << "\"Max\": \"" << FormatStatValue(descr->physical_type(), max)
<< "\", "
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min);
<< "\"Min\": \"" << FormatStatValue(descr->physical_type(), min) << "\"";
}
stream << "\" },";
stream << " },";
} else {
stream << "\"False\",";
}
Expand All@@ -312,11 +318,11 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
}
stream << "\", "
<< "\"UncompressedSize\": \"" << column_chunk->total_uncompressed_size()
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size();
<< "\", \"CompressedSize\": \"" << column_chunk->total_compressed_size() << "\"";

if (column_chunk->bloom_filter_offset()) {
// Output BloomFilter {offset, length}
stream << "\", BloomFilter {"
stream << ", \"BloomFilter\": {"
<< "\"offset\": \"" << column_chunk->bloom_filter_offset().value();
if (column_chunk->bloom_filter_length()) {
stream << "\", \"length\": \"" << column_chunk->bloom_filter_length().value();
Expand All@@ -327,7 +333,7 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetColumnIndexLocation()) {
auto location = column_chunk->GetColumnIndexLocation().value();
// Output ColumnIndex {offset, length}
stream << "\", ColumnIndex {"
stream << ", \"ColumnIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
Expand All@@ -336,14 +342,14 @@ void ParquetFilePrinter::JSONPrint(std::ostream& stream, std::list<int> selected
if (column_chunk->GetOffsetIndexLocation()) {
auto location = column_chunk->GetOffsetIndexLocation().value();
// Output OffsetIndex {offset, length}
stream << "\", OffsetIndex {"
stream << ", \"OffsetIndex\": {"
<< "\"offset\": \"" << location.offset;
stream << "\", \"length\": \"" << location.length;
stream << "\"}";
}

// end of a ColumnChunk
stream << "\" }";
stream << " }";
c1++;
if (c1 != static_cast<int>(selected_columns.size())) {
stream << ",\n";
Expand Down
22 changes: 16 additions & 6 deletions cpp/src/parquet/types.cc
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -115,12 +115,22 @@ std::string FormatStatValue(Type::type parquet_type, ::std::string_view val) {
result << i32_val[0] << " " << i32_val[1] << " " << i32_val[2];
break;
}
case Type::BYTE_ARRAY: {
return std::string(val);
}
case Type::FIXED_LEN_BYTE_ARRAY: {
return std::string(val);
}
case Type::BYTE_ARRAY:
case Type::FIXED_LEN_BYTE_ARRAY:
// Escape byte arrays to be usable in json strings.
for (char c : val) {
if (c == '\\' || c == '"')
result << '\\' << c;
else if (c >= 32 && c <= 126)
result << c;
else
// What to do if the byte array is not valid utf8?
// There doesn't seem to be a standard way to reversibly convert byte strings to valid utf8 while keeping simple ascii readable.
// For now we'll just output invalid utf8, which json parsers may be ok with. Idk if that's the best option.
result << c;
// result << "�";
}
break;
case Type::UNDEFINED:
default:
break;
Expand Down
Loading