storage/browser/blob/view_blob_internals_job.cc - chromium/src - Git at Google

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // 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/bind.h"
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/time_formatting.h"
 #include "base/location.h"
 #include "base/notreached.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/base/escape.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();
   return "Invalid blob state.";
 }

 void EndHTML(std::string* out) {
   out->append("\n</body></html>");
 }

 void AddHTMLBoldText(const std::string& text, std::string* out) {
   out->append("<b>");
   out->append(net::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(net::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(https://crbug.com/1112483): 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,
                  net::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
	// Copyright (c) 2012 The Chromium Authors. All rights reserved.
	// 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/bind.h"
	#include "base/compiler_specific.h"
	#include "base/format_macros.h"
	#include "base/i18n/number_formatting.h"
	#include "base/i18n/time_formatting.h"
	#include "base/location.h"
	#include "base/notreached.h"
	#include "base/single_thread_task_runner.h"
	#include "base/strings/string_number_conversions.h"
	#include "base/strings/string_util.h"
	#include "base/strings/stringprintf.h"
	#include "base/strings/utf_string_conversions.h"
	#include "base/threading/thread_task_runner_handle.h"
	#include "net/base/escape.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();
	return "Invalid blob state.";
	}

	void EndHTML(std::string* out) {
	out->append("\n</body></html>");
	}

	void AddHTMLBoldText(const std::string& text, std::string* out) {
	out->append("<b>");
	out->append(net::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(net::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(https://crbug.com/1112483): 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,
	net::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