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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "storage/browser/blob/view_blob_internals_job.h"
#include <stddef.h>
#include <stdint.h>
#include <sstream>
#include "base/compiler_specific.h"
#include "base/format_macros.h"
#include "base/functional/bind.h"
#include "base/i18n/number_formatting.h"
#include "base/i18n/time_formatting.h"
#include "base/location.h"
#include "base/notreached.h"
#include "base/strings/escape.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/single_thread_task_runner.h"
#include "net/base/net_errors.h"
#include "storage/browser/blob/blob_data_item.h"
#include "storage/browser/blob/blob_entry.h"
#include "storage/browser/blob/blob_storage_constants.h"
#include "storage/browser/blob/blob_storage_context.h"
#include "storage/browser/blob/blob_storage_registry.h"
#include "storage/browser/blob/shareable_blob_data_item.h"
namespace storage {
namespace {
const char kEmptyBlobStorageMessage[] = "No available blob data.";
const char kContentType[] = "Content Type: ";
const char kContentDisposition[] = "Content Disposition: ";
const char kCount[] = "Count: ";
const char kIndex[] = "Index: ";
const char kType[] = "Type: ";
const char kPath[] = "Path: ";
const char kURL[] = "URL: ";
const char kModificationTime[] = "Modification Time: ";
const char kOffset[] = "Offset: ";
const char kLength[] = "Length: ";
const char kRefcount[] = "Refcount: ";
const char kStatus[] = "Status: ";
void StartHTML(std::string* out) {
out->append(
"<!DOCTYPE HTML>"
"<html><title>Blob Storage Internals</title>"
"<meta http-equiv=\"Content-Security-Policy\""
" content=\"object-src 'none'; script-src 'none'\">\n"
"<style>\n"
"body { font-family: sans-serif; font-size: 0.8em; }\n"
"tt, code, pre { font-family: WebKitHack, monospace; }\n"
"form { display: inline }\n"
".subsection_body { margin: 10px 0 10px 2em; }\n"
".subsection_title { font-weight: bold; }\n"
"</style>\n"
"</head><body>\n\n");
}
std::string StatusToString(BlobStatus status) {
switch (status) {
case BlobStatus::ERR_INVALID_CONSTRUCTION_ARGUMENTS:
return "BlobStatus::ERR_INVALID_CONSTRUCTION_ARGUMENTS: Illegal blob "
"construction.";
case BlobStatus::ERR_OUT_OF_MEMORY:
return "BlobStatus::ERR_OUT_OF_MEMORY: Not enough memory or disk space "
"available for blob.";
case BlobStatus::ERR_FILE_WRITE_FAILED:
return "BlobStatus::ERR_FILE_WRITE_FAILED: File operation failed";
case BlobStatus::ERR_SOURCE_DIED_IN_TRANSIT:
return "BlobStatus::ERR_SOURCE_DIED_IN_TRANSIT: Blob source died before "
"transporting data to browser.";
case BlobStatus::ERR_BLOB_DEREFERENCED_WHILE_BUILDING:
return "BlobStatus::ERR_BLOB_DEREFERENCED_WHILE_BUILDING: Blob "
"references removed while building.";
case BlobStatus::ERR_REFERENCED_BLOB_BROKEN:
return "BlobStatus::ERR_REFERENCED_BLOB_BROKEN: Blob contains dependency "
"blob that is broken.";
case BlobStatus::ERR_REFERENCED_FILE_UNAVAILABLE:
return "BlobStatus::ERR_REFERENCED_FILE_UNAVAILABLE: Blob contains "
"dependency on file that is unavailable.";
case BlobStatus::DONE:
return "BlobStatus::DONE: Blob built with no errors.";
case BlobStatus::PENDING_QUOTA:
return "BlobStatus::PENDING_QUOTA: Blob construction is pending on "
"memory or file quota.";
case BlobStatus::PENDING_TRANSPORT:
return "BlobStatus::PENDING_TRANSPORT: Blob construction is pending on "
"data transport from renderer.";
case BlobStatus::PENDING_REFERENCED_BLOBS:
return "BlobStatus::PENDING_REFERENCED_BLOBS: Blob construction is "
"pending on dependency blobs to finish construction.";
case BlobStatus::PENDING_CONSTRUCTION:
return "BlobStatus::PENDING_CONSTRUCTION: Blob construction is pending "
"on resolving the UUIDs of refereneced blobs.";
}
NOTREACHED();
}
void EndHTML(std::string* out) {
out->append("\n</body></html>");
}
void AddHTMLBoldText(const std::string& text, std::string* out) {
out->append("<b>");
out->append(base::EscapeForHTML(text));
out->append("</b>");
}
void StartHTMLList(std::string* out) {
out->append("\n<ul>");
}
void EndHTMLList(std::string* out) {
out->append("</ul>\n");
}
void AddHTMLListItem(const std::string& element_title,
const std::string& element_data,
std::string* out) {
out->append("<li>");
// No need to escape element_title since constant string is passed.
out->append(element_title);
out->append(base::EscapeForHTML(element_data));
out->append("</li>\n");
}
} // namespace
std::string ViewBlobInternalsJob::GenerateHTML(
BlobStorageContext* blob_storage_context) {
std::string out;
StartHTML(&out);
if (blob_storage_context->registry().blob_map_.empty()) {
out.append(kEmptyBlobStorageMessage);
} else {
for (const auto& uuid_entry_pair :
blob_storage_context->registry().blob_map_) {
AddHTMLBoldText(uuid_entry_pair.first, &out);
BlobEntry* entry = uuid_entry_pair.second.get();
GenerateHTMLForBlobData(*entry, entry->content_type(),
entry->content_disposition(), entry->refcount(),
&out);
}
// TODO(crbug.com/40709731): Bring back information about blob URLs.
}
EndHTML(&out);
return out;
}
void ViewBlobInternalsJob::GenerateHTMLForBlobData(
const BlobEntry& blob_data,
const std::string& content_type,
const std::string& content_disposition,
size_t refcount,
std::string* out) {
StartHTMLList(out);
AddHTMLListItem(kRefcount, base::NumberToString(refcount), out);
AddHTMLListItem(kStatus, StatusToString(blob_data.status()), out);
if (!content_type.empty())
AddHTMLListItem(kContentType, content_type, out);
if (!content_disposition.empty())
AddHTMLListItem(kContentDisposition, content_disposition, out);
bool has_multi_items = blob_data.items().size() > 1;
if (has_multi_items) {
AddHTMLListItem(kCount,
base::UTF16ToUTF8(base::FormatNumber(blob_data.items().size())), out);
}
for (size_t i = 0; i < blob_data.items().size(); ++i) {
if (has_multi_items) {
AddHTMLListItem(kIndex, base::UTF16ToUTF8(base::FormatNumber(i)), out);
StartHTMLList(out);
}
const BlobDataItem& item = *(blob_data.items().at(i)->item());
switch (item.type()) {
case BlobDataItem::Type::kBytes:
AddHTMLListItem(kType, "data", out);
break;
case BlobDataItem::Type::kFile:
AddHTMLListItem(kType, "file", out);
AddHTMLListItem(kPath, base::EscapeForHTML(item.path().AsUTF8Unsafe()),
out);
if (!item.expected_modification_time().is_null()) {
AddHTMLListItem(kModificationTime, base::UTF16ToUTF8(
TimeFormatFriendlyDateAndTime(item.expected_modification_time())),
out);
}
break;
case BlobDataItem::Type::kFileFilesystem:
AddHTMLListItem(kType, "filesystem", out);
AddHTMLListItem(kURL, item.filesystem_url().DebugString(), out);
if (!item.expected_modification_time().is_null()) {
AddHTMLListItem(kModificationTime, base::UTF16ToUTF8(
TimeFormatFriendlyDateAndTime(item.expected_modification_time())),
out);
}
break;
case BlobDataItem::Type::kReadableDataHandle: {
AddHTMLListItem(kType, "readable data handle", out);
std::stringstream ss;
item.data_handle()->PrintTo(&ss);
AddHTMLListItem(kURL, ss.str(), out);
break;
}
case BlobDataItem::Type::kBytesDescription:
AddHTMLListItem(kType, "pending data", out);
break;
}
if (item.offset()) {
AddHTMLListItem(kOffset, base::UTF16ToUTF8(base::FormatNumber(
static_cast<int64_t>(item.offset()))),
out);
}
if (static_cast<int64_t>(item.length()) != -1) {
AddHTMLListItem(kLength, base::UTF16ToUTF8(base::FormatNumber(
static_cast<int64_t>(item.length()))),
out);
}
if (has_multi_items)
EndHTMLList(out);
}
EndHTMLList(out);
}
} // namespace storage
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