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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/loader/download_utils_impl.h"
#include "build/build_config.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_client.h"
#include "net/http/http_content_disposition.h"
#include "net/http/http_response_headers.h"
#include "third_party/blink/public/common/mime_util/mime_util.h"
#include "url/gurl.h"
namespace {
// Allow list to rendering mhtml.
const char* const kAllowListSchemesToRenderingMhtml[] = {
url::kFileScheme,
#if BUILDFLAG(IS_ANDROID)
url::kContentScheme,
#endif // BUILDFLAG(IS_ANDROID)
};
// Determins whether given url would render the mhtml as html according to
// scheme.
bool ShouldAlwaysRenderMhtmlAsHtml(const GURL& url) {
for (const char* scheme : kAllowListSchemesToRenderingMhtml) {
if (url.SchemeIs(scheme)) {
return true;
}
}
return false;
}
} // namespace
namespace content {
namespace download_utils {
bool MustDownload(BrowserContext* browser_context,
const GURL& url,
const net::HttpResponseHeaders* headers,
const std::string& mime_type) {
if (headers) {
std::string disposition =
headers->GetNormalizedHeader("content-disposition")
.value_or(std::string());
if (!disposition.empty() &&
net::HttpContentDisposition(disposition, std::string())
.is_attachment()) {
return true;
}
if (GetContentClient()->browser()->ShouldForceDownloadResource(
browser_context, url, mime_type)) {
return true;
}
if (mime_type == "multipart/related" || mime_type == "message/rfc822") {
// Always allow rendering mhtml for content:// (on Android) and file:///.
if (ShouldAlwaysRenderMhtmlAsHtml(url)) {
return false;
}
// TODO(crbug.com/40552600): retrieve the new NavigationUIData from
// the request and and pass it to AllowRenderingMhtmlOverHttp().
return !GetContentClient()->browser()->AllowRenderingMhtmlOverHttp(
nullptr);
}
// TODO(qinmin): Check whether this is special-case user script that needs
// to be downloaded.
}
return false;
}
bool IsDownload(BrowserContext* browser_context,
const GURL& url,
const net::HttpResponseHeaders* headers,
const std::string& mime_type) {
if (MustDownload(browser_context, url, headers, mime_type)) {
return true;
}
if (blink::IsSupportedMimeType(mime_type)) {
return false;
}
return !headers || headers->response_code() / 100 == 2;
}
} // namespace download_utils
} // namespace content
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