Francois Cartegnie
7 years ago
5 changed files with 161 additions and 96 deletions
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/*****************************************************************************
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* json_helper.h: |
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***************************************************************************** |
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* Copyright (C) 2012-2019 VLC authors, VideoLabs and VideoLAN |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation; either version 2.1 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. |
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*****************************************************************************/ |
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#ifndef JSON_HELPER_H |
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#define JSON_HELPER_H |
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#include <vlc_common.h> |
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#include <vlc_stream.h> |
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#include <limits.h> |
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#include "json.h" |
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static inline |
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const json_value * json_getbyname(const json_value *object, const char *psz_name) |
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{ |
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if (object->type != json_object) return NULL; |
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for (unsigned int i=0; i < object->u.object.length; i++) |
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if (strcmp(object->u.object.values[i].name, psz_name) == 0) |
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return object->u.object.values[i].value; |
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return NULL; |
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} |
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static inline |
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char * jsongetstring(const json_value *node, const char *key) |
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{ |
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node = json_getbyname(node, key); |
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if (node && node->type == json_string) |
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return node->u.string.ptr; |
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return NULL; |
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} |
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static inline |
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char * json_dupstring(const json_value *node, const char *key) |
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{ |
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const char *str = jsongetstring(node, key); |
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return (str) ? strdup(str) : NULL; |
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} |
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static inline |
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json_value * json_parse_document(vlc_object_t *p_obj, const char *psz_buffer) |
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{ |
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json_settings settings; |
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char psz_error[128]; |
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memset (&settings, 0, sizeof (json_settings)); |
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json_value *root = json_parse_ex(&settings, psz_buffer, psz_error); |
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if (root == NULL) |
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{ |
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msg_Warn(p_obj, "Can't parse json data: %s", psz_error); |
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goto error; |
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} |
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if (root->type != json_object) |
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{ |
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msg_Warn(p_obj, "wrong json root node"); |
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goto error; |
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} |
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return root; |
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error: |
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if (root) json_value_free(root); |
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return NULL; |
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} |
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static inline |
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void * json_retrieve_document(vlc_object_t *p_obj, const char *psz_url) |
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{ |
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bool saved_no_interact = p_obj->no_interact; |
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p_obj->no_interact = true; |
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stream_t *p_stream = vlc_stream_NewURL(p_obj, psz_url); |
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p_obj->no_interact = saved_no_interact; |
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if (p_stream == NULL) |
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return NULL; |
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stream_t *p_chain = vlc_stream_FilterNew(p_stream, "inflate"); |
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if(p_chain) |
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p_stream = p_chain; |
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/* read answer */ |
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char *p_buffer = NULL; |
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int i_ret = 0; |
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for(;;) |
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{ |
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int i_read = 65536; |
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if(i_ret >= INT_MAX - i_read) |
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break; |
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p_buffer = realloc_or_free(p_buffer, 1 + i_ret + i_read); |
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if(unlikely(p_buffer == NULL)) |
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{ |
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vlc_stream_Delete(p_stream); |
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return NULL; |
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} |
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i_read = vlc_stream_Read(p_stream, &p_buffer[i_ret], i_read); |
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if(i_read <= 0) |
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break; |
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i_ret += i_read; |
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} |
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vlc_stream_Delete(p_stream); |
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p_buffer[i_ret] = 0; |
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return p_buffer; |
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} |
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#endif |
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