From: Bastian Dehn <hhaalo@arcor.de>
Date: Sun, 21 Jan 2024 08:23:36 +0000 (+0100)
Subject: add call back data write
X-Git-Tag: v1.0.0^2~502
X-Git-Url: https://gitweb.hhaalo.de/?a=commitdiff_plain;h=0b464d75454863e2243376eeaf8d9f5e93318fc5;p=sane-kds-s2000w-net.git

add call back data write
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a2063f..5c67c7c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ project("kds_s2000w_net" VERSION "0.0.1")
 
 find_library(SANE NAMES sane REQUIRED)
 find_package(CURL REQUIRED)
+find_package(JSON-C REQUIRED)
 
 add_library("sane-kds_s2000w_net"
 	SHARED
@@ -11,7 +12,7 @@ add_library("sane-kds_s2000w_net"
 	"src/kds_s2000w_handler.c")
 set_target_properties("sane-kds_s2000w_net" PROPERTIES VERSION 1)
 
-target_link_libraries("sane-kds_s2000w_net" curl)
+target_link_libraries("sane-kds_s2000w_net" json-c curl)
 
 install(TARGETS "sane-kds_s2000w_net"
 	DESTINATION "/usr/lib/x86_64-linux-gnu/sane")
\ No newline at end of file
diff --git a/src/kds_s2000w_handler.c b/src/kds_s2000w_handler.c
index 78dd436..b05a4fd 100644
--- a/src/kds_s2000w_handler.c
+++ b/src/kds_s2000w_handler.c
@@ -1,8 +1,24 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <stddef.h>
+#include <string.h>
 #include <curl/curl.h>
 #include "kds_s2000w_handler.h"
 
+size_t write_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
+{
+	char* data = (char*) userdata;
+	size_t fullsize = size * nmemb;
+
+	data = realloc(userdata, fullsize + 1);
+	if (!data)
+		return 0;
+
+	memcpy(data, ptr, fullsize);
+
+	return fullsize;
+}
+
 void* kds_s2000w_handler_open()
 {
 	printf("open\n");
@@ -10,10 +26,17 @@ void* kds_s2000w_handler_open()
 	if(curl) {
 		printf("curl\n");
 		CURLcode res;
+		char* data = NULL;
 		curl_easy_setopt(curl, CURLOPT_URL, "http://scanner.lan.hhaalo.de/api/session");
 		curl_easy_setopt(curl, CURLOPT_POST, 1L);
 		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "{\"OCPUserName\":\"hhaalo\"}");
+		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
+		curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*) data);
 		res = curl_easy_perform(curl);
+
+		printf("data: %s\n", data);
+		free(data);
+		data = NULL;
 		printf("curlcode: %li\n", res);
 		curl_easy_cleanup(curl);
 	}