cef/include/capi/cef_urlrequest_capi.h

// Copyright (c) 2020 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_URLREQUEST_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_URLREQUEST_CAPI_H_
#pragma once

#include "include/capi/cef_auth_callback_capi.h"
#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_request_capi.h"
#include "include/capi/cef_request_context_capi.h"
#include "include/capi/cef_response_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

struct _cef_urlrequest_client_t;

///
// Structure used to make a URL request. URL requests are not associated with a
// browser instance so no cef_client_t callbacks will be executed. URL requests
// can be created on any valid CEF thread in either the browser or render
// process. Once created the functions of the URL request object must be
// accessed on the same thread that created it.
///
typedef struct _cef_urlrequest_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Returns the request object used to create this URL request. The returned
  // object is read-only and should not be modified.
  ///
  struct _cef_request_t*(CEF_CALLBACK* get_request)(
      struct _cef_urlrequest_t* self);

  ///
  // Returns the client.
  ///
  struct _cef_urlrequest_client_t*(CEF_CALLBACK* get_client)(
      struct _cef_urlrequest_t* self);

  ///
  // Returns the request status.
  ///
  cef_urlrequest_status_t(CEF_CALLBACK* get_request_status)(
      struct _cef_urlrequest_t* self);

  ///
  // Returns the request error if status is UR_CANCELED or UR_FAILED, or 0
  // otherwise.
  ///
  cef_errorcode_t(CEF_CALLBACK* get_request_error)(
      struct _cef_urlrequest_t* self);

  ///
  // Returns the response, or NULL if no response information is available.
  // Response information will only be available after the upload has completed.
  // The returned object is read-only and should not be modified.
  ///
  struct _cef_response_t*(CEF_CALLBACK* get_response)(
      struct _cef_urlrequest_t* self);

  ///
  // Returns true (1) if the response body was served from the cache. This
  // includes responses for which revalidation was required.
  ///
  int(CEF_CALLBACK* response_was_cached)(struct _cef_urlrequest_t* self);

  ///
  // Cancel the request.
  ///
  void(CEF_CALLBACK* cancel)(struct _cef_urlrequest_t* self);
} cef_urlrequest_t;

///
// Create a new URL request that is not associated with a specific browser or
// frame. Use cef_frame_t::CreateURLRequest instead if you want the request to
// have this association, in which case it may be handled differently (see
// documentation on that function). Requests may originate from the both browser
// process and the render process.
//
// For requests originating from the browser process:
//   - It may be intercepted by the client via CefResourceRequestHandler or
//     CefSchemeHandlerFactory.
//   - POST data may only contain only a single element of type PDE_TYPE_FILE
//     or PDE_TYPE_BYTES.
//   - If |request_context| is empty the global request context will be used.
// For requests originating from the render process:
//   - It cannot be intercepted by the client so only http(s) and blob schemes
//     are supported.
//   - POST data may only contain a single element of type PDE_TYPE_BYTES.
//   - The |request_context| parameter must be NULL.
//
// The |request| object will be marked as read-only after calling this function.
///
CEF_EXPORT cef_urlrequest_t* cef_urlrequest_create(
    struct _cef_request_t* request,
    struct _cef_urlrequest_client_t* client,
    struct _cef_request_context_t* request_context);

///
// Structure that should be implemented by the cef_urlrequest_t client. The
// functions of this structure will be called on the same thread that created
// the request unless otherwise documented.
///
typedef struct _cef_urlrequest_client_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Notifies the client that the request has completed. Use the
  // cef_urlrequest_t::GetRequestStatus function to determine if the request was
  // successful or not.
  ///
  void(CEF_CALLBACK* on_request_complete)(struct _cef_urlrequest_client_t* self,
                                          struct _cef_urlrequest_t* request);

  ///
  // Notifies the client of upload progress. |current| denotes the number of
  // bytes sent so far and |total| is the total size of uploading data (or -1 if
  // chunked upload is enabled). This function will only be called if the
  // UR_FLAG_REPORT_UPLOAD_PROGRESS flag is set on the request.
  ///
  void(CEF_CALLBACK* on_upload_progress)(struct _cef_urlrequest_client_t* self,
                                         struct _cef_urlrequest_t* request,
                                         int64 current,
                                         int64 total);

  ///
  // Notifies the client of download progress. |current| denotes the number of
  // bytes received up to the call and |total| is the expected total size of the
  // response (or -1 if not determined).
  ///
  void(CEF_CALLBACK* on_download_progress)(
      struct _cef_urlrequest_client_t* self,
      struct _cef_urlrequest_t* request,
      int64 current,
      int64 total);

  ///
  // Called when some part of the response is read. |data| contains the current
  // bytes received since the last call. This function will not be called if the
  // UR_FLAG_NO_DOWNLOAD_DATA flag is set on the request.
  ///
  void(CEF_CALLBACK* on_download_data)(struct _cef_urlrequest_client_t* self,
                                       struct _cef_urlrequest_t* request,
                                       const void* data,
                                       size_t data_length);

  ///
  // Called on the IO thread when the browser needs credentials from the user.
  // |isProxy| indicates whether the host is a proxy server. |host| contains the
  // hostname and |port| contains the port number. Return true (1) to continue
  // the request and call cef_auth_callback_t::cont() when the authentication
  // information is available. If the request has an associated browser/frame
  // then returning false (0) will result in a call to GetAuthCredentials on the
  // cef_request_handler_t associated with that browser, if any. Otherwise,
  // returning false (0) will cancel the request immediately. This function will
  // only be called for requests initiated from the browser process.
  ///
  int(CEF_CALLBACK* get_auth_credentials)(
      struct _cef_urlrequest_client_t* self,
      int isProxy,
      const cef_string_t* host,
      int port,
      const cef_string_t* realm,
      const cef_string_t* scheme,
      struct _cef_auth_callback_t* callback);
} cef_urlrequest_client_t;

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_URLREQUEST_CAPI_H_