1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* $Id$
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* Jabber
* Copyright (C) 1998-1999 The Jabber Team http://jabber.org/
*/
/*! \file
* \ingroup xmpp
*/
#include "xode.h"
/* xode_stream is a way to have a consistent method of handling incoming XML Stream based events... it doesn't handle the generation of an XML Stream, but provides some facilities to help do that */
static void _xode_put_expatattribs(xode owner, const char** atts)
{
int i = 0;
if (atts == NULL) return;
while (atts[i] != '\0')
{
xode_put_attrib(owner, atts[i], atts[i+1]);
i += 2;
}
}
/******* internal expat callbacks *********/
static void _xode_stream_startElement(xode_stream xs, const char* name, const char** atts)
{
xode_pool p;
/* if xode_stream is bad, get outa here */
if(xs->status > XODE_STREAM_NODE) return;
if(xs->node == NULL)
{
p = xode_pool_heap(5*1024); /* 5k, typically 1-2k each plus copy of self and workspace */
xs->node = xode_new_frompool(p,name);
_xode_put_expatattribs(xs->node, atts);
if(xs->status == XODE_STREAM_ROOT)
{
xs->status = XODE_STREAM_NODE; /* flag status that we're processing nodes now */
(xs->f)(XODE_STREAM_ROOT, xs->node, xs->arg); /* send the root, f must free all nodes */
xs->node = NULL;
}
}else{
xs->node = xode_insert_tag(xs->node, name);
_xode_put_expatattribs(xs->node, atts);
}
/* depth check */
xs->depth++;
if(xs->depth > XODE_STREAM_MAXDEPTH)
xs->status = XODE_STREAM_ERROR;
}
static void _xode_stream_endElement(xode_stream xs, const char* name)
{
xode parent;
/* if xode_stream is bad, get outa here */
if(xs->status > XODE_STREAM_NODE) return;
/* if it's already NULL we've received </stream>, tell the app and we're outta here */
if(xs->node == NULL)
{
xs->status = XODE_STREAM_CLOSE;
(xs->f)(XODE_STREAM_CLOSE, NULL, xs->arg);
}else{
parent = xode_get_parent(xs->node);
/* we are the top-most node, feed to the app who is responsible to delete it */
if(parent == NULL)
(xs->f)(XODE_STREAM_NODE, xs->node, xs->arg);
xs->node = parent;
}
xs->depth--;
}
static void _xode_stream_charData(xode_stream xs, const char *str, int len)
{
/* if xode_stream is bad, get outa here */
if(xs->status > XODE_STREAM_NODE) return;
if(xs->node == NULL)
{
/* we must be in the root of the stream where CDATA is irrelevant */
return;
}
xode_insert_cdata(xs->node, str, len);
}
static void _xode_stream_cleanup(void *arg)
{
xode_stream xs = (xode_stream)arg;
xode_free(xs->node); /* cleanup anything left over */
XML_ParserFree(xs->parser);
}
/* creates a new xode_stream with given pool, xode_stream will be cleaned up w/ pool */
xode_stream xode_stream_new(xode_pool p, xode_stream_onNode f, void *arg)
{
xode_stream newx;
if(p == NULL || f == NULL)
{
fprintf(stderr,"Fatal Programming Error: xode_streamnew() was improperly called with NULL.\n");
return NULL;
}
newx = xode_pool_malloco(p, sizeof(_xode_stream));
newx->p = p;
newx->f = f;
newx->arg = arg;
/* create expat parser and ensure cleanup */
newx->parser = XML_ParserCreate(NULL);
XML_SetUserData(newx->parser, (void *)newx);
XML_SetElementHandler(newx->parser,
(void (*)(void*, const char*, const char**))_xode_stream_startElement,
(void (*)(void*, const char*))_xode_stream_endElement);
XML_SetCharacterDataHandler(newx->parser,
(void (*)(void*, const char*, int))_xode_stream_charData);
xode_pool_cleanup(p, _xode_stream_cleanup, (void *)newx);
return newx;
}
/* attempts to parse the buff onto this stream firing events to the handler, returns the last known status */
int xode_stream_eat(xode_stream xs, char *buff, int len)
{
char *err;
xode xerr;
static char maxerr[] = "maximum node size reached";
static char deeperr[] = "maximum node depth reached";
if(xs == NULL)
{
fprintf(stderr,"Fatal Programming Error: xode_streameat() was improperly called with NULL.\n");
return XODE_STREAM_ERROR;
}
if(len == 0 || buff == NULL)
return xs->status;
if(len == -1) /* easy for hand-fed eat calls */
len = strlen(buff);
if(!XML_Parse(xs->parser, buff, len, 0))
{
err = (char *)XML_ErrorString(XML_GetErrorCode(xs->parser));
xs->status = XODE_STREAM_ERROR;
}else if(xode_pool_size(xode_get_pool(xs->node)) > XODE_STREAM_MAXNODE || xs->cdata_len > XODE_STREAM_MAXNODE){
err = maxerr;
xs->status = XODE_STREAM_ERROR;
}else if(xs->status == XODE_STREAM_ERROR){ /* set within expat handlers */
err = deeperr;
}else{
err = deeperr;
}
/* fire parsing error event, make a node containing the error string */
if(xs->status == XODE_STREAM_ERROR)
{
xerr = xode_new("error");
xode_insert_cdata(xerr,err,-1);
(xs->f)(XODE_STREAM_ERROR, xerr, xs->arg);
}
return xs->status;
}
|
