cef/include/capi/cef_scheme_capi.h

// Copyright (c) 2011 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
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//    * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//    * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
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//
// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
//

#ifndef _CEF_SCHEME_CAPI_H
#define _CEF_SCHEME_CAPI_H

#ifdef __cplusplus
extern "C" {
#endif

#include "cef_base_capi.h"


///
// Register a custom scheme. This function should not be called for the built-in
// HTTP, HTTPS, FILE, FTP, ABOUT and DATA schemes.
//
// If |is_standard| is true (1) the scheme will be treated as a standard scheme.
// Standard schemes are subject to URL canonicalization and parsing rules as
// defined in the Common Internet Scheme Syntax RFC 1738 Section 3.1 available
// at http://www.ietf.org/rfc/rfc1738.txt
//
// In particular, the syntax for standard scheme URLs must be of the form: <pre>
//  [scheme]://[username]:[password]@[host]:[port]/[url-path]
// </pre> Standard scheme URLs must have a host component that is a fully
// qualified domain name as defined in Section 3.5 of RFC 1034 [13] and Section
// 2.1 of RFC 1123. These URLs will be canonicalized to "scheme://host/path" in
// the simplest case and "scheme://username:password@host:port/path" in the most
// explicit case. For example, "scheme:host/path" and "scheme:///host/path" will
// both be canonicalized to "scheme://host/path". The origin of a standard
// scheme URL is the combination of scheme, host and port (i.e.,
// "scheme://host:port" in the most explicit case).
//
// For non-standard scheme URLs only the "scheme:" component is parsed and
// canonicalized. The remainder of the URL will be passed to the handler as-is.
// For example, "scheme:///some%20text" will remain the same. Non-standard
// scheme URLs cannot be used as a target for form submission.
//
// If |is_local| is true (1) the scheme will be treated as local (i.e., with the
// same security rules as those applied to "file" URLs). Normal pages cannot
// link to or access local URLs. Also, by default, local URLs can only perform
// XMLHttpRequest calls to the same URL (origin + path) that originated the
// request. To allow XMLHttpRequest calls from a local URL to other URLs with
// the same origin set the CefSettings.file_access_from_file_urls_allowed value
// to true (1). To allow XMLHttpRequest calls from a local URL to all origins
// set the CefSettings.universal_access_from_file_urls_allowed value to true
// (1).
//
// If |is_display_isolated| is true (1) the scheme will be treated as display-
// isolated. This means that pages cannot display these URLs unless they are
// from the same scheme. For example, pages in another origin cannot create
// iframes or hyperlinks to URLs with this scheme.
//
// This function may be called on any thread. It should only be called once per
// unique |scheme_name| value. If |scheme_name| is already registered or if an
// error occurs this function will return false (0).
///
CEF_EXPORT int cef_register_custom_scheme(const cef_string_t* scheme_name,
    int is_standard, int is_local, int is_display_isolated);

///
// Register a scheme handler factory for the specified |scheme_name| and
// optional |domain_name|. An NULL |domain_name| value for a standard scheme
// will cause the factory to match all domain names. The |domain_name| value
// will be ignored for non-standard schemes. If |scheme_name| is a built-in
// scheme and no handler is returned by |factory| then the built-in scheme
// handler factory will be called. If |scheme_name| is a custom scheme the
// cef_register_custom_scheme() function should be called for that scheme. This
// function may be called multiple times to change or remove the factory that
// matches the specified |scheme_name| and optional |domain_name|. Returns false
// (0) if an error occurs. This function may be called on any thread.
///
CEF_EXPORT int cef_register_scheme_handler_factory(
    const cef_string_t* scheme_name, const cef_string_t* domain_name,
    struct _cef_scheme_handler_factory_t* factory);

///
// Clear all registered scheme handler factories. Returns false (0) on error.
// This function may be called on any thread.
///
CEF_EXPORT int cef_clear_scheme_handler_factories();

///
// Structure that creates cef_scheme_handler_t instances. The functions of this
// structure will always be called on the IO thread.
///
typedef struct _cef_scheme_handler_factory_t
{
  ///
  // Base structure.
  ///
  cef_base_t base;

  ///
  // Return a new scheme handler instance to handle the request. |browser| will
  // be the browser window that initiated the request. If the request was
  // initiated using the cef_web_urlrequest_t API |browser| will be NULL.
  ///
  struct _cef_scheme_handler_t* (CEF_CALLBACK *create)(
      struct _cef_scheme_handler_factory_t* self,
      struct _cef_browser_t* browser, const cef_string_t* scheme_name,
      struct _cef_request_t* request);

} cef_scheme_handler_factory_t;


///
// Structure used to facilitate asynchronous responses to custom scheme handler
// requests. The functions of this structure may be called on any thread.
///
typedef struct _cef_scheme_handler_callback_t
{
  ///
  // Base structure.
  ///
  cef_base_t base;

  ///
  // Notify that header information is now available for retrieval.
  ///
  void (CEF_CALLBACK *headers_available)(
      struct _cef_scheme_handler_callback_t* self);

  ///
  // Notify that response data is now available for reading.
  ///
  void (CEF_CALLBACK *bytes_available)(
      struct _cef_scheme_handler_callback_t* self);

  ///
  // Cancel processing of the request.
  ///
  void (CEF_CALLBACK *cancel)(struct _cef_scheme_handler_callback_t* self);

} cef_scheme_handler_callback_t;


///
// Structure used to implement a custom scheme handler structure. The functions
// of this structure will always be called on the IO thread.
///
typedef struct _cef_scheme_handler_t
{
  ///
  // Base structure.
  ///
  cef_base_t base;

  ///
  // Begin processing the request. To handle the request return true (1) and
  // call headers_available() once the response header information is available
  // (headers_available() can also be called from inside this function if header
  // information is available immediately). To cancel the request return false
  // (0).
  ///
  int (CEF_CALLBACK *process_request)(struct _cef_scheme_handler_t* self,
      struct _cef_request_t* request,
      struct _cef_scheme_handler_callback_t* callback);

  ///
  // Retrieve response header information. If the response length is not known
  // set |response_length| to -1 and read_response() will be called until it
  // returns false (0). If the response length is known set |response_length| to
  // a positive value and read_response() will be called until it returns false
  // (0) or the specified number of bytes have been read. Use the |response|
  // object to set the mime type, http status code and other optional header
  // values. To redirect the request to a new URL set |redirectUrl| to the new
  // URL.
  ///
  void (CEF_CALLBACK *get_response_headers)(struct _cef_scheme_handler_t* self,
      struct _cef_response_t* response, int64* response_length,
      cef_string_t* redirectUrl);

  ///
  // Read response data. If data is available immediately copy up to
  // |bytes_to_read| bytes into |data_out|, set |bytes_read| to the number of
  // bytes copied, and return true (1). To read the data at a later time set
  // |bytes_read| to 0, return true (1) and call bytes_available() when the data
  // is available. To indicate response completion return false (0).
  ///
  int (CEF_CALLBACK *read_response)(struct _cef_scheme_handler_t* self,
      void* data_out, int bytes_to_read, int* bytes_read,
      struct _cef_scheme_handler_callback_t* callback);

  ///
  // Request processing has been canceled.
  ///
  void (CEF_CALLBACK *cancel)(struct _cef_scheme_handler_t* self);

} cef_scheme_handler_t;


#ifdef __cplusplus
}
#endif

#endif // _CEF_SCHEME_CAPI_H