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/* sane - Scanner Access Now Easy.
Copyright (C) 2019 Touboul Nathane
Copyright (C) 2019 Thierry HUCHARD <thierry@ordissimo.com>
This file is part of the SANE package.
SANE is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
SANE is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with sane; see the file COPYING.
If not, see <https://www.gnu.org/licenses/>.
This file implements a SANE backend for eSCL scanners. */
#define DEBUG_DECLARE_ONLY
#include "../include/sane/config.h"
#include "escl.h"
#include <stdlib.h>
#include <string.h>
static size_t
write_callback(void __sane_unused__*str,
size_t __sane_unused__ size,
size_t nmemb,
void __sane_unused__ *userp)
{
return nmemb;
}
/**
* \fn void escl_scanner(const ESCL_Device *device, char *result)
* \brief Function that resets the scanner after each scan, using curl.
* This function is called in the 'sane_cancel' function.
*/
void
escl_scanner(const ESCL_Device *device, char *result)
{
CURL *curl_handle = NULL;
const char *scan_jobs = "/eSCL/ScanJobs";
const char *scanner_start = "/NextDocument";
char scan_cmd[PATH_MAX] = { 0 };
int i = 0;
long answer = 0;
if (device == NULL || result == NULL)
return;
CURL_CALL:
curl_handle = curl_easy_init();
if (curl_handle != NULL) {
snprintf(scan_cmd, sizeof(scan_cmd), "%s%s%s",
scan_jobs, result, scanner_start);
escl_curl_url(curl_handle, device, scan_cmd);
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_callback);
if (curl_easy_perform(curl_handle) == CURLE_OK) {
curl_easy_getinfo(curl_handle, CURLINFO_RESPONSE_CODE, &answer);
i++;
if (i >= 15) return;
}
curl_easy_cleanup(curl_handle);
if (SANE_STATUS_GOOD != escl_status(device,
PLATEN,
NULL,
NULL))
goto CURL_CALL;
}
}
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