curl_reschedule.c File Reference

API for event loop integration with GNUnet SCHEDULER. More...

#include "platform.h"
#include <jansson.h>
#include "gnunet_curl_lib.h"
#include "gnunet_util_lib.h"

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Data Structures
struct	GNUNET_CURL_RescheduleContext
	Closure for GNUNET_CURL_gnunet_scheduler_reschedule(). More...

Functions
void *	GNUNET_CURL_download_get_result_ (struct GNUNET_CURL_DownloadBuffer *db, CURL *eh, long *response_code)
struct GNUNET_CURL_RescheduleContext *	GNUNET_CURL_gnunet_rc_create_with_parser (struct GNUNET_CURL_Context *ctx, GNUNET_CURL_RawParser rp, GNUNET_CURL_ResponseCleaner rc)
	Initialize reschedule context; with custom response parser. More...
static void	clean_result (void *response)
	Just a wrapper to avoid casting of function pointers. More...
struct GNUNET_CURL_RescheduleContext *	GNUNET_CURL_gnunet_rc_create (struct GNUNET_CURL_Context *ctx)
	Initialize reschedule context. More...
void	GNUNET_CURL_gnunet_rc_destroy (struct GNUNET_CURL_RescheduleContext *rc)
	Destroy reschedule context. More...
static void	context_task (void *cls)
	Task that runs the context's event loop with the GNUnet scheduler. More...
void	GNUNET_CURL_gnunet_scheduler_reschedule (void *cls)
	Implementation of the GNUNET_CURL_RescheduleCallback for GNUnet's scheduler. More...

Detailed Description

API for event loop integration with GNUnet SCHEDULER.

Author

Christian Grothoff

Definition in file curl_reschedule.c.

Function Documentation

GNUNET_CURL_download_get_result_()

void * GNUNET_CURL_download_get_result_	(	struct GNUNET_CURL_DownloadBuffer *	db,
		CURL *	eh,
		long *	response_code
	)

Definition at line 649 of file curl.c.

{
  json_t *json;
  json_error_t error;
  char *ct;
 
#if DEBUG
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Downloaded body: %.*s\n",
              (int) db->buf_size,
              (char *) db->buf);
#endif
  if (CURLE_OK !=
      curl_easy_getinfo (eh,
                         CURLINFO_RESPONSE_CODE,
                         response_code))
  {
    /* unexpected error... */
    GNUNET_break (0);
    *response_code = 0;
  }
  if (MHD_HTTP_NO_CONTENT == *response_code)
    return NULL;
  if ((CURLE_OK !=
       curl_easy_getinfo (eh,
                          CURLINFO_CONTENT_TYPE,
                          &ct)) ||
      (NULL == ct) ||
      (! is_json (ct)))
  {
    /* No content type or explicitly not JSON, refuse to parse
       (but keep response code) */
    if (0 != db->buf_size)
    {
      char *url;
 
      if (CURLE_OK !=
          curl_easy_getinfo (eh,
                             CURLINFO_EFFECTIVE_URL,
                             &url))
        url = "<unknown URL>";
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Request to `%s' was expected to return a body of type `application/json', got `%s'\n",
                  url,
                  ct);
    }
    return NULL;
  }
  if (0 == *response_code)
  {
    char *url;
 
    if (CURLE_OK !=
        curl_easy_getinfo (eh,
                           CURLINFO_EFFECTIVE_URL,
                           &url))
      url = "<unknown URL>";
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Failed to download response from `%s': \n",
                url);
    return NULL;
  }
  json = NULL;
  if (0 == db->eno)
  {
    json = json_loadb (db->buf,
                       db->buf_size,
                       JSON_REJECT_DUPLICATES | JSON_DISABLE_EOF_CHECK,
                       &error);
    if (NULL == json)
    {
      JSON_WARN (error);
      *response_code = 0;
    }
  }
  GNUNET_free (db->buf);
  db->buf = NULL;
  db->buf_size = 0;
  return json;
}

References db, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_log, is_json(), JSON_WARN, and MHD_HTTP_NO_CONTENT.

Referenced by GNUNET_CURL_gnunet_rc_create(), and GNUNET_CURL_perform().

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clean_result()

static void clean_result ( void *  response )

static

Just a wrapper to avoid casting of function pointers.

Parameters

response

the (JSON) response to clean.

Definition at line 84 of file curl_reschedule.c.

{
  json_decref (response);
}

References response.

Referenced by GNUNET_CURL_gnunet_rc_create().

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context_task()

static void context_task ( void *  cls )

static

Task that runs the context's event loop with the GNUnet scheduler.

Parameters

cls	a struct GNUNET_CURL_RescheduleContext *

Definition at line 118 of file curl_reschedule.c.

{
  struct GNUNET_CURL_RescheduleContext *rc = cls;
  long timeout;
  int max_fd;
  fd_set read_fd_set;
  fd_set write_fd_set;
  fd_set except_fd_set;
  struct GNUNET_NETWORK_FDSet *rs;
  struct GNUNET_NETWORK_FDSet *ws;
  struct GNUNET_TIME_Relative delay;
 
  rc->task = NULL;
  GNUNET_CURL_perform2 (rc->ctx, rc->parser, rc->cleaner);
  max_fd = -1;
  timeout = -1;
  FD_ZERO (&read_fd_set);
  FD_ZERO (&write_fd_set);
  FD_ZERO (&except_fd_set);
  GNUNET_CURL_get_select_info (rc->ctx,
                               &read_fd_set,
                               &write_fd_set,
                               &except_fd_set,
                               &max_fd,
                               &timeout);
  if (timeout >= 0)
    delay =
      GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
                                     timeout);
  else
    delay = GNUNET_TIME_UNIT_FOREVER_REL;
  rs = GNUNET_NETWORK_fdset_create ();
  GNUNET_NETWORK_fdset_copy_native (rs,
                                    &read_fd_set,
                                    max_fd + 1);
  ws = GNUNET_NETWORK_fdset_create ();
  GNUNET_NETWORK_fdset_copy_native (ws,
                                    &write_fd_set,
                                    max_fd + 1);
  if (NULL == rc->task)
    rc->task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
                                            delay,
                                            rs,
                                            ws,
                                            &context_task,
                                            rc);
  GNUNET_NETWORK_fdset_destroy (rs);
  GNUNET_NETWORK_fdset_destroy (ws);
}

References GNUNET_CURL_RescheduleContext::cleaner, context_task(), GNUNET_CURL_RescheduleContext::ctx, GNUNET_CURL_get_select_info(), GNUNET_CURL_perform2(), GNUNET_NETWORK_fdset_copy_native(), GNUNET_NETWORK_fdset_create(), GNUNET_NETWORK_fdset_destroy(), GNUNET_SCHEDULER_add_select(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, GNUNET_TIME_relative_multiply(), GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_TIME_UNIT_MILLISECONDS, GNUNET_CURL_RescheduleContext::parser, GNUNET_CURL_RescheduleContext::task, and timeout.

Referenced by context_task(), and GNUNET_CURL_gnunet_scheduler_reschedule().

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