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
|
/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/rpc/legacy_reply.h"
#include <utility>
#include <tuple>
#include "mongo/rpc/legacy_reply_builder.h"
#include "mongo/rpc/metadata.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace rpc {
LegacyReply::LegacyReply(const Message* message) : _message(std::move(message)) {
invariant(message->operation() == opReply);
QueryResult::View qr = _message->singleData().view2ptr();
// should be checked by caller.
invariant(qr.msgdata().getNetworkOp() == opReply);
uassert(ErrorCodes::BadValue,
str::stream() << "Got legacy command reply with a bad cursorId field,"
<< " expected a value of 0 but got " << qr.getCursorId(),
qr.getCursorId() == 0);
uassert(ErrorCodes::BadValue,
str::stream() << "Got legacy command reply with a bad nReturned field,"
<< " expected a value of 1 but got " << qr.getNReturned(),
qr.getNReturned() == 1);
uassert(ErrorCodes::BadValue,
str::stream() << "Got legacy command reply with a bad startingFrom field,"
<< " expected a value of 0 but got " << qr.getStartingFrom(),
qr.getStartingFrom() == 0);
std::tie(_commandReply, _metadata) =
uassertStatusOK(rpc::upconvertReplyMetadata(BSONObj(qr.data())));
// Copy the bson array of documents from the message into
// a contiguous area of memory owned by _docBuffer so
// DocumentRange can be used to iterate over documents
auto cursorElem = _commandReply[LegacyReplyBuilder::kCursorTag];
if (cursorElem.eoo())
return;
BSONObj cursorObj = cursorElem.Obj();
auto firstBatchElem = cursorObj[LegacyReplyBuilder::kFirstBatchTag];
if (firstBatchElem.eoo())
return;
for (BSONObjIterator it(firstBatchElem.Obj()); it.more(); it.next()) {
invariant((*it).isABSONObj());
BSONObj doc = (*it).Obj();
doc.appendSelfToBufBuilder(_docBuffer);
}
const char* dataBegin = _docBuffer.buf();
const char* dataEnd = dataBegin + _docBuffer.len();
_outputDocs = DocumentRange(dataBegin, dataEnd);
return;
}
const BSONObj& LegacyReply::getMetadata() const {
return _metadata;
}
const BSONObj& LegacyReply::getCommandReply() const {
return _commandReply;
}
DocumentRange LegacyReply::getOutputDocs() const {
return _outputDocs;
}
Protocol LegacyReply::getProtocol() const {
return rpc::Protocol::kOpQuery;
}
} // namespace rpc
} // namespace mongo
|
