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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/extensions/file_manager/private_api_media_parser.h"
#include <string_view>
#include "base/base64.h"
#include "base/functional/bind.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/strcat.h"
#include "base/values.h"
#include "chrome/browser/apps/platform_apps/api/media_galleries/blob_data_source_factory.h"
#include "chrome/browser/ash/extensions/file_manager/private_api_media_parser_util.h"
#include "chrome/common/extensions/api/file_manager_private.h"
#include "chrome/common/extensions/api/file_manager_private_internal.h"
#include "chrome/services/media_gallery_util/public/mojom/media_parser.mojom.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/browser/blob_reader.h"
#include "net/base/mime_sniffer.h"
#include "net/base/mime_util.h"
namespace extensions {
FileManagerPrivateInternalGetContentMimeTypeFunction::
FileManagerPrivateInternalGetContentMimeTypeFunction() = default;
FileManagerPrivateInternalGetContentMimeTypeFunction::
~FileManagerPrivateInternalGetContentMimeTypeFunction() = default;
ExtensionFunction::ResponseAction
FileManagerPrivateInternalGetContentMimeTypeFunction::Run() {
EXTENSION_FUNCTION_VALIDATE(args().size() >= 1);
EXTENSION_FUNCTION_VALIDATE(args()[0].is_string());
const std::string& blob_uuid = args()[0].GetString();
if (blob_uuid.empty()) {
return RespondNow(Error("Blob UUID must not be empty."));
}
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
&FileManagerPrivateInternalGetContentMimeTypeFunction::ReadBlobBytes,
this, blob_uuid));
return RespondLater();
}
void FileManagerPrivateInternalGetContentMimeTypeFunction::ReadBlobBytes(
const std::string& blob_uuid) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
BlobReader::Read( // Read net::kMaxBytesToSniff bytes from the front.
browser_context()->GetBlobRemote(blob_uuid),
base::BindOnce(
&FileManagerPrivateInternalGetContentMimeTypeFunction::SniffMimeType,
this, blob_uuid),
0, net::kMaxBytesToSniff);
}
void FileManagerPrivateInternalGetContentMimeTypeFunction::SniffMimeType(
const std::string& blob_uuid,
std::string sniff_bytes,
int64_t /*length*/) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
std::string mime_type;
if (!net::SniffMimeTypeFromLocalData(sniff_bytes, &mime_type)) {
Respond(Error("Could not deduce the content mime type."));
return;
}
Respond(WithArguments(mime_type));
}
FileManagerPrivateInternalGetContentMetadataFunction::
FileManagerPrivateInternalGetContentMetadataFunction() = default;
FileManagerPrivateInternalGetContentMetadataFunction::
~FileManagerPrivateInternalGetContentMetadataFunction() = default;
ExtensionFunction::ResponseAction
FileManagerPrivateInternalGetContentMetadataFunction::Run() {
using api::file_manager_private_internal::GetContentMetadata::Params;
const std::optional<Params> params = Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params);
if (params->blob_uuid.empty()) {
return RespondNow(Error("Blob UUID must not be empty"));
}
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
&FileManagerPrivateInternalGetContentMetadataFunction::ReadBlobSize,
this, params->blob_uuid, params->mime_type, params->include_images));
return RespondLater();
}
void FileManagerPrivateInternalGetContentMetadataFunction::ReadBlobSize(
const std::string& blob_uuid,
const std::string& mime_type,
bool include_images) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
BlobReader::Read( // Read net::kMaxBytesToSniff bytes from the front.
browser_context()->GetBlobRemote(blob_uuid),
base::BindOnce(
&FileManagerPrivateInternalGetContentMetadataFunction::CanParseBlob,
this, blob_uuid, mime_type, include_images),
0, net::kMaxBytesToSniff);
}
void FileManagerPrivateInternalGetContentMetadataFunction::CanParseBlob(
const std::string& blob_uuid,
const std::string& mime_type,
bool include_images,
std::string /*sniff_bytes*/,
int64_t length) { // The length of the original input blob.
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!net::MatchesMimeType("audio/*", mime_type) &&
!net::MatchesMimeType("video/*", mime_type)) {
Respond(Error("An audio or video mime type is required."));
return;
}
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
&FileManagerPrivateInternalGetContentMetadataFunction::ParseBlob,
this, blob_uuid, mime_type, include_images, length));
}
void FileManagerPrivateInternalGetContentMetadataFunction::ParseBlob(
const std::string& blob_uuid,
const std::string& mime_type,
bool include_images,
int64_t length) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
auto input_blob_data_source =
std::make_unique<chrome_apps::api::BlobDataSourceFactory>(
browser_context(), blob_uuid);
auto metadata_parser = std::make_unique<SafeMediaMetadataParser>(
length, mime_type, include_images, std::move(input_blob_data_source));
auto* safe_media_metadata_parser = metadata_parser.get();
safe_media_metadata_parser->Start(base::BindOnce(
&FileManagerPrivateInternalGetContentMetadataFunction::ParserDone, this,
std::move(metadata_parser)));
}
void FileManagerPrivateInternalGetContentMetadataFunction::ParserDone(
std::unique_ptr<SafeMediaMetadataParser> parser_keep_alive,
bool parser_success,
chrome::mojom::MediaMetadataPtr metadata,
std::unique_ptr<std::vector<metadata::AttachedImage>> images) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!parser_success) {
Respond(Error("Could not parse the media metadata."));
return;
}
DCHECK(metadata);
base::Value::Dict dictionary =
extensions::api::file_manager_private::MojoMediaMetadataToValue(
std::move(metadata));
metadata::AttachedImage* image = nullptr;
int size = 0;
DCHECK(images);
if (!images->empty()) {
image = &images->front();
if (base::IsValueInRangeForNumericType<int>(image->data.size())) {
size = base::checked_cast<int>(image->data.size());
}
}
if (image && size && !image->type.empty()) { // Attach thumbnail image.
std::string url =
base::Base64Encode(std::string_view(image->data.data(), size));
url.insert(0, base::StrCat({"data:", image->type, ";base64,"}));
base::Value::Dict media_thumbnail_image;
media_thumbnail_image.Set("data", std::move(url));
media_thumbnail_image.Set("type", std::move(image->type));
base::Value::List* attached_images_list =
dictionary.FindList("attachedImages");
attached_images_list->Append(std::move(media_thumbnail_image));
}
Respond(WithArguments(std::move(dictionary)));
}
} // namespace extensions
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