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authorJörg Frings-Fürst <debian@jff-webhosting.net>2020-03-30 21:30:45 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2020-03-30 21:30:45 +0200
commitee770c2346eb37e0dcb8b6cf3eaacf3d8efd6bbc (patch)
tree58f05092be1a17a939e861f8cadcda1b6ca2ecef /backend/escl/escl_scan.c
parent0da9e21872802cfc6e975b1ebaf9efb9e5934d84 (diff)
parentfef76e17ed4c607ea73b81279f9ef1d7121be900 (diff)
Merge branch 'release/experimental/1.0.29-1_experimental1'experimental/1.0.29-1_experimental1
Diffstat (limited to 'backend/escl/escl_scan.c')
-rw-r--r--backend/escl/escl_scan.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/backend/escl/escl_scan.c b/backend/escl/escl_scan.c
new file mode 100644
index 0000000..8f077a1
--- /dev/null
+++ b/backend/escl/escl_scan.c
@@ -0,0 +1,99 @@
+/* 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, write to the Free
+ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ This file implements a SANE backend for eSCL scanners. */
+
+#define DEBUG_DECLARE_ONLY
+#include "../include/sane/config.h"
+
+#include "escl.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <curl/curl.h>
+
+#include "../include/sane/sanei.h"
+
+/**
+ * \fn static size_t write_callback(void *str, size_t size, size_t nmemb, void *userp)
+ * \brief Callback function that writes the image scanned into the temporary file.
+ *
+ * \return to_write (the result of the fwrite fonction)
+ */
+static size_t
+write_callback(void *str, size_t size, size_t nmemb, void *userp)
+{
+ size_t to_write = fwrite(str, size, nmemb, (FILE *)userp);
+
+ return (to_write);
+}
+
+/**
+ * \fn SANE_Status escl_scan(capabilities_t *scanner, SANE_String_Const name, char *result)
+ * \brief Function that, after recovering the 'new job', scans the image writed in the
+ * temporary file, using curl.
+ * This function is called in the 'sane_start' function and it's the equivalent of
+ * the following curl command : "curl -s http(s)://'ip:'port'/eSCL/ScanJobs/'new job'/NextDocument > image.jpg".
+ *
+ * \return status (if everything is OK, status = SANE_STATUS_GOOD, otherwise, SANE_STATUS_NO_MEM/SANE_STATUS_INVAL)
+ */
+SANE_Status
+escl_scan(capabilities_t __sane_unused__ *scanner, SANE_String_Const name, char *result)
+{
+ CURL *curl_handle = NULL;
+ const char *scan_jobs = "/eSCL/ScanJobs";
+ const char *scanner_start = "/NextDocument";
+ char scan_cmd[PATH_MAX] = { 0 };
+ SANE_Status status = SANE_STATUS_GOOD;
+
+ if (name == NULL)
+ return (SANE_STATUS_NO_MEM);
+ curl_handle = curl_easy_init();
+ if (curl_handle != NULL) {
+ strcpy(scan_cmd, name);
+ strcat(scan_cmd, scan_jobs);
+ strcat(scan_cmd, result);
+ strcat(scan_cmd, scanner_start);
+ curl_easy_setopt(curl_handle, CURLOPT_URL, scan_cmd);
+ DBG( 1, "Scan : %s.\n", scan_cmd);
+ if (strncmp(name, "https", 5) == 0) {
+ DBG( 1, "Ignoring safety certificates, use https\n");
+ curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, 0L);
+ curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, 0L);
+ }
+ curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_callback);
+ scanner->tmp = tmpfile();
+ if (scanner->tmp != NULL) {
+ curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, scanner->tmp);
+ if (curl_easy_perform(curl_handle) != CURLE_OK) {
+ status = SANE_STATUS_INVAL;
+ }
+ else
+ curl_easy_cleanup(curl_handle);
+ fseek(scanner->tmp, 0, SEEK_SET);
+ }
+ else
+ status = SANE_STATUS_NO_MEM;
+ }
+ return (status);
+}