mediafire-fuse/mfapi/apicalls/file_get_links.c

/*
 * Copyright (C) 2013 Bryan Christ <bryan.christ@mediafire.com>
 *               2014 Johannes Schauer <j.schauer@email.de>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2, as published by
 * the Free Software Foundation.
 *
 * This program 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
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

#include <jansson.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "../../utils/http.h"
#include "../mfconn.h"
#include "../file.h"
#include "../apicalls.h"        // IWYU pragma: keep

static int      _decode_file_get_links(mfhttp * conn, void *data);

int mfconn_api_file_get_links(mfconn * conn, mffile * file,
                              const char *quickkey,
                              enum mfconn_file_link_type link_mask)
{
    const char     *api_call;
    int             retval;
    int             len;
    mfhttp         *http;
    int             i;

    if (conn == NULL)
        return -1;

    if (file == NULL)
        return -1;
    if (quickkey == NULL)
        return -1;

    len = strlen(quickkey);

    // key must either be 11 or 15 chars
    if (len != 11 && len != 15)
        return -1;

    for (i = 0; i < mfconn_get_max_num_retries(conn); i++) {
        api_call = mfconn_create_signed_get(conn, 0, "file/get_links.php",
                                            "?quick_key=%s"
                                            "&link_type=%s"
                                            "&response_format=json",
                                            quickkey,
                                            mfconn_file_link_types[link_mask]);
        if (api_call == NULL) {
            fprintf(stderr, "mfconn_create_signed_get failed\n");
            return -1;
        }

        http = http_create();
        retval = http_get_buf(http, api_call, _decode_file_get_links, file);
        http_destroy(http);
        mfconn_update_secret_key(conn);

        free((void *)api_call);

        if (retval != 127 && retval != 28)
            break;

        // if there was either a curl timeout or a token error, get a new
        // token and try again
        //
        // on a curl timeout we get a new token because it is likely that we
        // lost signature synchronization (we don't know whether the server
        // accepted or rejected the last call)
        fprintf(stderr, "got error %d - negotiate a new token\n", retval);
        retval = mfconn_refresh_token(conn);
        if (retval != 0) {
            fprintf(stderr, "failed to get a new token\n");
            break;
        }
    }

    return retval;
}

static int _decode_file_get_links(mfhttp * conn, void *data)
{
    json_error_t    error;
    json_t         *root;
    json_t         *node;
    json_t         *quickkey;
    json_t         *share_link;
    json_t         *direct_link;
    json_t         *onetime_link;
    json_t         *links_array;
    int             retval = 0;
    mffile         *file;

    if (data == NULL)
        return -1;

    file = (mffile *) data;

    root = http_parse_buf_json(conn, 0, &error);

    if (root == NULL) {
        fprintf(stderr, "http_parse_buf_json failed at line %d\n", error.line);
        fprintf(stderr, "error message: %s\n", error.text);
        return -1;
    }

    node = json_object_get(root, "response");

    retval = mfapi_check_response(node, "file/get_links");
    if (retval != 0) {
        fprintf(stderr, "invalid response\n");
        json_decref(root);
        return retval;
    }

    links_array = json_object_get(node, "links");
    if (!json_is_array(links_array)) {
        json_decref(root);
        return -1;
    }
    // just get the first one.  maybe later support multi-quickkey
    node = json_array_get(links_array, 0);

    quickkey = json_object_get(node, "quickkey");
    if (quickkey != NULL)
        file_set_key(file, json_string_value(quickkey));

    share_link = json_object_get(node, "normal_download");
    if (share_link != NULL)
        file_set_share_link(file, json_string_value(share_link));

    direct_link = json_object_get(node, "direct_download");
    if (direct_link != NULL) {
        file_set_direct_link(file, json_string_value(direct_link));
    }

    onetime_link = json_object_get(node, "one_time_download");
    if (onetime_link != NULL) {
        file_set_onetime_link(file, (char *)json_string_value(onetime_link));
    }
    // if this is false something went horribly wrong
    // if (share_link == NULL)
    //    retval = -1;

    json_decref(root);

    return retval;
}