|
1
|
|
|
""" |
|
2
|
|
|
parse simple structures from an xml tree |
|
3
|
|
|
We only support a subset of features but should be enough |
|
4
|
|
|
for custom structures |
|
5
|
|
|
""" |
|
6
|
|
|
|
|
7
|
1 |
|
import os |
|
8
|
1 |
|
import importlib |
|
9
|
|
|
|
|
10
|
1 |
|
from lxml import objectify |
|
11
|
|
|
|
|
12
|
|
|
|
|
13
|
1 |
|
from opcua.ua.ua_binary import Primitives |
|
14
|
|
|
|
|
15
|
|
|
|
|
16
|
1 |
|
def get_default_value(uatype): |
|
17
|
1 |
|
if uatype == "String": |
|
18
|
1 |
|
return "None" |
|
19
|
1 |
|
elif uatype == "Guid": |
|
20
|
1 |
|
return "uuid.uuid4()" |
|
21
|
1 |
|
elif uatype in ("ByteString", "CharArray", "Char"): |
|
22
|
1 |
|
return None |
|
23
|
1 |
|
elif uatype == "Boolean": |
|
24
|
1 |
|
return "True" |
|
25
|
1 |
|
elif uatype == "DateTime": |
|
26
|
1 |
|
return "datetime.utcnow()" |
|
27
|
1 |
|
elif uatype in ("Int8", "Int16", "Int32", "Int64", "UInt8", "UInt16", "UInt32", "UInt64", "Double", "Float", "Byte", "SByte"): |
|
28
|
1 |
|
return 0 |
|
29
|
|
|
else: |
|
30
|
1 |
|
return "ua." + uatype + "()" |
|
31
|
|
|
|
|
32
|
|
|
|
|
33
|
1 |
|
class Struct(object): |
|
34
|
1 |
|
def __init__(self, name): |
|
35
|
1 |
|
self.name = name |
|
36
|
1 |
|
self.fields = [] |
|
37
|
1 |
|
self.code = "" |
|
38
|
|
|
|
|
39
|
1 |
|
def get_code(self): |
|
40
|
1 |
|
if not self.fields: |
|
41
|
|
|
return """ |
|
42
|
|
|
|
|
43
|
|
|
class {}(object): |
|
44
|
|
|
pass |
|
45
|
|
|
|
|
46
|
|
|
""".format(self.name) |
|
47
|
1 |
|
self._make_constructor() |
|
48
|
1 |
|
self._make_from_binary() |
|
49
|
1 |
|
self._make_to_binary() |
|
50
|
1 |
|
return self.code |
|
51
|
|
|
|
|
52
|
1 |
|
def _make_constructor(self): |
|
53
|
1 |
|
self.code = """ |
|
54
|
|
|
|
|
55
|
|
|
|
|
56
|
|
|
class {0}(object): |
|
57
|
|
|
''' |
|
58
|
|
|
{0} structure autogenerated from xml |
|
59
|
|
|
''' |
|
60
|
|
|
def __init__(self, data=None): |
|
61
|
|
|
if data is not None: |
|
62
|
|
|
self._binary_init(data) |
|
63
|
|
|
return |
|
64
|
|
|
""".format(self.name) |
|
65
|
1 |
|
for field in self.fields: |
|
66
|
1 |
|
self.code += " self.{} = {}\n".format(field.name, field.value) |
|
67
|
|
|
|
|
68
|
1 |
|
def _make_from_binary(self): |
|
69
|
1 |
|
self.code += ''' |
|
70
|
|
|
@staticmethod |
|
71
|
|
|
def from_binary(data): |
|
72
|
|
|
return {}(data=data) |
|
73
|
|
|
|
|
74
|
|
|
def _binary_init(self, data): |
|
75
|
|
|
'''.format(self.name) |
|
76
|
1 |
|
for field in self.fields: |
|
77
|
1 |
|
if hasattr(Primitives, field.uatype): |
|
78
|
1 |
|
if field.array: |
|
79
|
1 |
|
self.code += ' self.{} = ua.ua_binary.Primitives.{}.unpack_array(data)\n'.format(field.name, field.uatype) |
|
80
|
|
|
else: |
|
81
|
1 |
|
self.code += ' self.{} = ua.ua_binary.Primitives.{}.unpack(data)\n'.format(field.name, field.uatype) |
|
82
|
|
|
else: |
|
83
|
1 |
|
if field.array: |
|
84
|
1 |
|
self.code += ''' |
|
85
|
|
|
length = ua.ua_binary.Primitives.Int32.unpack(data) |
|
86
|
|
|
if length == -1: |
|
87
|
|
|
self.{0} = None |
|
88
|
|
|
else: |
|
89
|
|
|
self.{0} = [ua.{1}.from_binary(data) for _ in range(length)] |
|
90
|
|
|
'''.format(field.name, field.uatype) |
|
91
|
|
|
else: |
|
92
|
1 |
|
self.code += " self.{} = ua.{}.from_binary(data)\n".format(field.name, field.uatype) |
|
93
|
|
|
|
|
94
|
1 |
|
def _make_to_binary(self): |
|
95
|
1 |
|
self.code += ''' |
|
96
|
|
|
def to_binary(self): |
|
97
|
|
|
packet = [] |
|
98
|
|
|
''' |
|
99
|
1 |
|
for field in self.fields: |
|
100
|
1 |
|
if hasattr(Primitives, field.uatype): |
|
101
|
1 |
|
if field.array: |
|
102
|
1 |
|
self.code += ' packet.append(ua.ua_binary.Primitives.{}.pack_array(self.{}))\n'.format(field.uatype, field.name) |
|
103
|
|
|
else: |
|
104
|
1 |
|
self.code += ' packet.append(ua.ua_binary.Primitives.{}.pack(self.{}))\n'.format(field.uatype, field.name) |
|
105
|
|
|
else: |
|
106
|
1 |
|
if field.array: |
|
107
|
1 |
|
self.code += ''' |
|
108
|
|
|
if self.{0} is None: |
|
109
|
|
|
packet.append(ua.ua_binary.Primitives.Int32.pack(-1)) |
|
110
|
|
|
else: |
|
111
|
|
|
packet.append(ua.ua_binary.Primitives.Int32.pack(len(self.{0}))) |
|
112
|
|
|
for element in self.{0}: |
|
113
|
|
|
packet.append(element.to_binary()) |
|
114
|
|
|
'''.format(field.name) |
|
115
|
|
|
else: |
|
116
|
1 |
|
self.code += " packet.append(self.{}.to_binary())\n".format(field.name) |
|
117
|
1 |
|
self.code += ' return b"".join(packet)' |
|
118
|
|
|
|
|
119
|
|
|
|
|
120
|
1 |
|
class Field(object): |
|
121
|
1 |
|
def __init__(self, name): |
|
122
|
1 |
|
self.name = name |
|
123
|
1 |
|
self.uatype = None |
|
124
|
1 |
|
self.value = None |
|
125
|
1 |
|
self.array = False |
|
126
|
|
|
|
|
127
|
|
|
|
|
128
|
1 |
|
class StructGenerator(object): |
|
129
|
1 |
|
def __init__(self): |
|
130
|
1 |
|
self.model = [] |
|
131
|
|
|
|
|
132
|
1 |
|
def make_model_from_string(self, xml): |
|
133
|
|
|
obj = objectify.fromstring(xml) |
|
134
|
|
|
self._make_model(obj) |
|
135
|
|
|
|
|
136
|
1 |
|
def make_model_from_file(self, path): |
|
137
|
1 |
|
obj = objectify.parse(path) |
|
138
|
1 |
|
root = obj.getroot() |
|
139
|
1 |
|
self._make_model(root) |
|
140
|
|
|
|
|
141
|
1 |
|
def _make_model(self, root): |
|
142
|
1 |
|
for child in root.iter("{*}StructuredType"): |
|
143
|
1 |
|
struct = Struct(child.get("Name")) |
|
144
|
1 |
|
array = False |
|
145
|
1 |
|
for xmlfield in child.iter("{*}Field"): |
|
146
|
1 |
|
name = xmlfield.get("Name") |
|
147
|
1 |
|
if name.startswith("NoOf"): |
|
148
|
1 |
|
array = True |
|
149
|
1 |
|
continue |
|
150
|
1 |
|
field = Field(name) |
|
151
|
1 |
|
field.uatype = xmlfield.get("TypeName") |
|
152
|
1 |
|
if ":" in field.uatype: |
|
153
|
1 |
|
field.uatype = field.uatype.split(":")[1] |
|
154
|
1 |
|
field.value = get_default_value(field.uatype) |
|
155
|
1 |
|
if array: |
|
156
|
1 |
|
field.array = True |
|
157
|
1 |
|
field.value = [] |
|
158
|
1 |
|
array = False |
|
159
|
1 |
|
struct.fields.append(field) |
|
160
|
1 |
|
self.model.append(struct) |
|
161
|
|
|
|
|
162
|
1 |
|
def save_to_file(self, path): |
|
163
|
1 |
|
_file = open(path, "wt") |
|
164
|
1 |
|
self._make_header(_file) |
|
165
|
1 |
|
for struct in self.model: |
|
166
|
1 |
|
_file.write(struct.get_code()) |
|
167
|
1 |
|
_file.close() |
|
168
|
|
|
|
|
169
|
1 |
|
def save_and_import(self, path): |
|
170
|
1 |
|
self.save_to_file(path) |
|
171
|
1 |
|
name = os.path.basename(path) |
|
172
|
1 |
|
name = os.path.splitext(name)[0] |
|
173
|
1 |
|
mymodule = importlib.import_module(name) |
|
174
|
1 |
|
mydict = {struct.name: getattr(mymodule, struct.name) for struct in self.model} |
|
175
|
1 |
|
return mydict |
|
176
|
|
|
|
|
177
|
1 |
|
def get_structures(self): |
|
178
|
|
|
ld = {} |
|
179
|
|
|
for struct in self.model: |
|
180
|
|
|
exec(struct.get_code(), ld) |
|
181
|
|
|
return ld |
|
182
|
|
|
|
|
183
|
1 |
|
def _make_header(self, _file): |
|
184
|
1 |
|
_file.write(""" |
|
185
|
|
|
''' |
|
186
|
|
|
THIS FILE IS AUTOGENERATED, DO NOT EDIT!!! |
|
187
|
|
|
''' |
|
188
|
|
|
|
|
189
|
|
|
from datetime import datetime |
|
190
|
|
|
import uuid |
|
191
|
|
|
|
|
192
|
|
|
from opcua import ua |
|
193
|
|
|
""") |
|
194
|
|
|
|
|
195
|
|
|
|
|
196
|
|
|
|
|
197
|
|
|
|
|
198
|
1 |
|
if __name__ == "__main__": |
|
199
|
|
|
import sys |
|
200
|
|
|
from IPython import embed |
|
201
|
|
|
sys.path.insert(0, ".") # necessary for import in current dir |
|
202
|
|
|
|
|
203
|
|
|
#xmlpath = "schemas/Opc.Ua.Types.bsd" |
|
204
|
|
|
xmlpath = "schemas/example.bsd" |
|
205
|
|
|
c = StructGenerator(xmlpath, "structures.py") |
|
206
|
|
|
c.run() |
|
207
|
|
|
import structures as s |
|
208
|
|
|
|
|
209
|
|
|
|
|
210
|
|
|
#sts = c.get_structures() |
|
211
|
|
|
embed() |
|
212
|
|
|
|
FreeOpcUa /
python-opcua
