Hello, dear Tizen developers!

I am a junior Tizen developer, so I do not know many things about it.

One of this things – images in WebView. I have this code from the official WebView example(https://developer.tizen.org/community/tip-tech/webview-native-application):

#include "webviewexample.h"

// Header files needed for     EWK Webkit
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Ecore_Getopt.h>
#include <Eet.h>
#include <Eina.h>
#include <Elementary.h>
#include <Evas.h>
#include <EWebKit.h>
#include <app.h>

typedef struct appdata {
	Evas_Object *win;
	Evas_Object *conform;
	Evas_Object *label;
	Evas_Object *entry;
	Evas_Object *web_view;
	Evas_Object *back_button;
	Evas_Object *forward_button;
} appdata_s;

static void
win_back_cb(void *data, Evas_Object *obj, void *event_info)
{
	appdata_s *ad = data;
	/* Let window go to hide state. */
	elm_win_iconified_set(ad->win, EINA_TRUE);
}

static void
btn_go_cb(void *data, Evas_Object *obj, void *event_info)
{
	appdata_s* ad = data;
	ewk_view_url_set(ad->web_view, elm_object_text_get(ad->entry) );
}

static void
btn_prev_cb(void *data, Evas_Object *obj, void *event_info)
{
	appdata_s* ad = data;
	if( ewk_view_back_possible( ad->web_view ) == EINA_TRUE )
		ewk_view_back( ad->web_view );
}

static void
btn_next_cb(void *data, Evas_Object *obj, void *event_info)
{
	appdata_s* ad = data;
	if( ewk_view_forward_possible( ad->web_view ) == EINA_TRUE )
		ewk_view_forward( ad->web_view );
}

static void
my_table_pack(Evas_Object *table, Evas_Object *child, int x, int y, int w, int h)
{
   evas_object_size_hint_align_set(child, EVAS_HINT_FILL, EVAS_HINT_FILL);
   evas_object_size_hint_weight_set(child, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   elm_table_pack(table, child, x, y, w, h);
   evas_object_show(child);
}

static void
create_base_gui(appdata_s *ad)
{
	/* set up policy to exit when last window is closed */
	elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
	/* Window */
	ad->win = elm_win_util_standard_add(PACKAGE, PACKAGE);
	elm_win_autodel_set(ad->win, EINA_TRUE);

	int rots[4] = { 0, 90, 180, 270 };
	elm_win_wm_rotation_available_rotations_set(ad->win, (const int *)(&rots), 4);

	eext_object_event_callback_add(ad->win, EEXT_CALLBACK_BACK, win_back_cb, ad);

    {
        /* Box to put the table in so we can bottom-align the table
         * window will stretch all resize object content to win size */
        Evas_Object *box = elm_box_add(ad->win);
        evas_object_size_hint_weight_set(box, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
        elm_win_resize_object_add(ad->win, box);
        evas_object_show(box);

        /* Table */
        Evas_Object *table = elm_table_add(ad->win);
        /* Make table homogenous - every cell will be the same size */
        elm_table_homogeneous_set(table, EINA_TRUE);
        /* Set padding of 10 pixels multiplied by scale factor of UI */
        elm_table_padding_set(table, 5 * elm_config_scale_get(), 10 * elm_config_scale_get());
        /* Let the table child allocation area expand within in the box */
        evas_object_size_hint_weight_set(table, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
        /* Set table to fiill width but align to bottom of box */
        evas_object_size_hint_align_set(table, EVAS_HINT_FILL, EVAS_HINT_FILL);
        elm_box_pack_end(box, table);
        evas_object_show(table);

        {
            /* Entry */
            ad->entry = elm_entry_add(ad->win);
            elm_entry_scrollable_set(ad->entry, EINA_TRUE);
            eext_entry_selection_back_event_allow_set(ad->entry, EINA_TRUE);
            elm_object_text_set(ad->entry, "http://www.tizen.org");
            my_table_pack(table, ad->entry, 0, 0, 3, 1);

            /* Button-1 */
            Evas_Object *btn = elm_button_add(ad->win);
            elm_object_text_set(btn, "Prev");
            evas_object_smart_callback_add(btn, "clicked", btn_prev_cb, ad);
            my_table_pack(table, btn, 0, 1, 1, 1);

            /* Button-2 */
            btn = elm_button_add(ad->win);
            elm_object_text_set(btn, "Go");
            evas_object_smart_callback_add(btn, "clicked", btn_go_cb, ad);
            my_table_pack(table, btn, 1, 1, 1, 1);

            /* Button-3 */
            btn = elm_button_add(ad->win);
            elm_object_text_set(btn, "Next");
            evas_object_smart_callback_add(btn, "clicked", btn_next_cb, ad);
            my_table_pack(table, btn, 2, 1, 1, 1);

            /* WebView */
            Evas *evas = evas_object_evas_get(ad->win);
            ad->web_view = ewk_view_add(evas);
            ewk_view_url_set(ad->web_view, elm_object_text_get(ad->entry) );
            my_table_pack(table, ad->web_view, 0, 2, 3, 8);

        }
    }

    /* Show window after base gui is set up */
    evas_object_show(ad->win);
}

static bool
app_create(void *data)
{
	/* Hook to take necessary actions before main event loop starts
		Initialize UI resources and application's data
		If this function returns true, the main loop of application starts
		If this function returns false, the application is terminated */
	appdata_s *ad = data;

	create_base_gui(ad);

	return true;
}

static void
app_control(app_control_h app_control, void *data)
{
	/* Handle the launch request. */
}

static void
app_pause(void *data)
{
	/* Take necessary actions when application becomes invisible. */
}

static void
app_resume(void *data)
{
	/* Take necessary actions when application becomes visible. */
}

static void
app_terminate(void *data)
{
	/* Release all resources. */
	ewk_shutdown();
}

static void
ui_app_lang_changed(app_event_info_h event_info, void *user_data)
{
	/*APP_EVENT_LANGUAGE_CHANGED*/
	char *locale = NULL;
	system_settings_get_value_string(SYSTEM_SETTINGS_KEY_LOCALE_LANGUAGE, &locale);
	elm_language_set(locale);
	free(locale);
	return;
}

int
main(int argc, char *argv[])
{
	appdata_s ad = {0,};
	memset(&ad, 0x00, sizeof(appdata_s));
	int ret = 0;

	ui_app_lifecycle_callback_s event_callback = {0,};
	memset(&event_callback, 0x00, sizeof(ui_app_lifecycle_callback_s));
	app_event_handler_h handlers[5] = {NULL, };

	event_callback.create = app_create;
	event_callback.terminate = app_terminate;
	event_callback.pause = app_pause;
	event_callback.resume = app_resume;
	event_callback.app_control = app_control;

	ui_app_add_event_handler(&handlers[APP_EVENT_LANGUAGE_CHANGED], APP_EVENT_LANGUAGE_CHANGED, ui_app_lang_changed, &ad);

	ret = ui_app_main(argc, argv, &event_callback, &ad);
	if (ret != APP_ERROR_NONE) {
		dlog_print(DLOG_ERROR, LOG_TAG, "app_main() is failed. err = %d", ret);
	}

	return ret;
}

The main problem is how to upload images? Especially I need to know how to do it on the Facebook or Twitter.

I use this permission in the tizen-manifest file:

<privilege>http://tizen.org/privilege/network.get</privilege>
        <privilege>http://tizen.org/privilege/internet</privilege>
        
        <!--To launch another application conditionally-->
   <privilege>http://tizen.org/privilege/appmanager.launch</privilege>
   <!--To create, update, and delete content-->
   <privilege>http://tizen.org/privilege/content.write</privilege>
 
   <!--To provide user notifications, such as messages and badges-->
   <privilege>http://tizen.org/privilege/notification</privilege>
   <!--To use the user location data-->
   <privilege>http://tizen.org/privilege/location</privilege>
   <!--To manage the device cameras to preview and capture pictures-->
   <privilege>http://tizen.org/privilege/camera</privilege>
   <!--To access, read, and write to the external storage-->
   <privilege>http://tizen.org/privilege/externalstorage</privilege>
   <!--To access the display-->
   <privilege>http://tizen.org/privilege/display</privilege>

Help me, please. Thank you very much in advance!