url_utils.h revision d57369da7c6519fef57db42085f7b42d4c8845c1 
1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_PUBLIC_COMMON_URL_UTILS_H_
6#define CONTENT_PUBLIC_COMMON_URL_UTILS_H_
7
8#include <stddef.h>         // For size_t
9
10#include "build/build_config.h"
11#include "content/common/content_export.h"
12
13class GURL;
14
15namespace content {
16
17// Null terminated list of schemes that are savable. This function can be
18// invoked on any thread.
19CONTENT_EXPORT const char* const* GetSavableSchemes();
20
21// Returns true if the url has a scheme for WebUI.  See also
22// WebUIControllerFactory::UseWebUIForURL in the browser process.
23CONTENT_EXPORT bool HasWebUIScheme(const GURL& url);
24
25// Check whether we can do the saving page operation for the specified URL.
26CONTENT_EXPORT bool IsSavableURL(const GURL& url);
27
28#if defined(OS_ANDROID)
29// Set a new max size for URL's that we are willing to accept in the browser
30// process.
31// Should not be used except by Android WebView for backwards compatibility.
32// Should be called early in start up before forking child processes.
33//
34// This is for supporting legacy android apps, android webview needs to
35// support loading long data urls. In chrome, the url length is limited to 2M to
36// prevent renderer process DOS-ing the browser process. So only for android
37// webview, increase the limit to 20M, which is a large enough value to satisfy
38// legacy app compatibility requirements.
39CONTENT_EXPORT void SetMaxURLChars(size_t max_chars);
40#endif
41
42// The maximum number of characters in the URL that we're willing to accept
43// in the browser process. It is set low enough to avoid damage to the browser
44// but high enough that a web site can abuse location.hash for a little storage.
45// We have different values for "max accepted" and "max displayed" because
46// a data: URI may be legitimately massive, but the full URI would kill all
47// known operating systems if you dropped it into a UI control.
48CONTENT_EXPORT size_t GetMaxURLChars();
49
50}  // namespace content
51
52#endif  // CONTENT_PUBLIC_COMMON_URL_UTILS_H_
53