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
|
/** @file
Configuration of Forwarded HTTP header option.
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include <bitset>
#include <string>
#include <cctype>
#include <string_view>
#include "tscpp/util/TextView.h"
#include <HttpConfig.h>
namespace
{
class BadOptionsErrMsg
{
public:
// Construct with reference to string that will contain error message.
//
BadOptionsErrMsg(ts::FixedBufferWriter &err) : _err(err), _count(0) {}
// Add a bad option.
//
void
add(ts::TextView badOpt)
{
if (_count == 0) {
_err << "\"Forwarded\" configuration: ";
_addQuoted(badOpt);
_count = 1;
} else if (_count == 1) {
_saveLast = badOpt;
_count = 2;
} else {
_err << ", ";
_addQuoted(_saveLast);
_saveLast = badOpt;
++_count;
}
}
// Returns true it error seen.
//
bool
done()
{
if (_count == 0) {
return false;
}
if (_count == 1) {
_err << " is a bad option.";
} else if (_count != 0) {
_err << " and ";
_addQuoted(_saveLast);
_err << " are bad options.";
}
return true;
}
private:
void
_addQuoted(ts::TextView sv)
{
_err << '\"' << sv << '\"';
}
ts::FixedBufferWriter &_err;
ts::TextView _saveLast;
int _count;
};
// Compare a TextView to a nul-termimated string, converting the TextView to lower case and ignoring whitespace in it.
//
bool
eqIgnoreCaseWs(ts::TextView sv, const char *target)
{
const char *s = sv.data();
std::size_t skip = 0;
std::size_t i = 0;
while ((i + skip) < sv.size()) {
if (std::isspace(s[i + skip])) {
++skip;
} else if (std::tolower(s[i + skip]) != target[i]) {
return false;
} else {
++i;
}
}
return target[i] == '\0';
}
} // end anonymous namespace
namespace HttpForwarded
{
OptionBitSet
optStrToBitset(std::string_view optConfigStr, ts::FixedBufferWriter &error)
{
const ts::TextView Delimiters(":|");
OptionBitSet optBS;
// Convert to TS TextView to be able to use parsing members.
//
ts::TextView oCS{optConfigStr};
if (eqIgnoreCaseWs(oCS, "none")) {
return OptionBitSet();
}
BadOptionsErrMsg em(error);
do {
ts::TextView optStr = oCS.take_prefix_at(Delimiters);
if (eqIgnoreCaseWs(optStr, "for")) {
optBS.set(FOR);
} else if (eqIgnoreCaseWs(optStr, "by=ip")) {
optBS.set(BY_IP);
} else if (eqIgnoreCaseWs(optStr, "by=unknown")) {
optBS.set(BY_UNKNOWN);
} else if (eqIgnoreCaseWs(optStr, "by=servername")) {
optBS.set(BY_SERVER_NAME);
} else if (eqIgnoreCaseWs(optStr, "by=uuid")) {
optBS.set(BY_UUID);
} else if (eqIgnoreCaseWs(optStr, "proto")) {
optBS.set(PROTO);
} else if (eqIgnoreCaseWs(optStr, "host")) {
optBS.set(HOST);
} else if (eqIgnoreCaseWs(optStr, "connection=compact")) {
optBS.set(CONNECTION_COMPACT);
} else if (eqIgnoreCaseWs(optStr, "connection=std")) {
optBS.set(CONNECTION_STD);
} else if (eqIgnoreCaseWs(optStr, "connection=standard")) {
optBS.set(CONNECTION_STD);
} else if (eqIgnoreCaseWs(optStr, "connection=full")) {
optBS.set(CONNECTION_FULL);
} else {
em.add(optStr);
}
} while (oCS);
if (em.done()) {
return OptionBitSet();
}
return optBS;
} // end optStrToBitset()
} // end namespace HttpForwarded
|
