1 /*
2 Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2.0,
6 as published by the Free Software Foundation.
7
8 This program is also distributed with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
11 documentation. The authors of MySQL hereby grant you an additional
12 permission to link the program and your derivative works with the
13 separately licensed software that they have included with MySQL.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #include <stdlib.h>
26 #include <assert.h>
27
28 #include <NdbApi.hpp>
29 #include <node_buffer.h>
30
31 #include "adapter_global.h"
32 #include "unified_debug.h"
33 #include "BlobHandler.h"
34 #include "JsWrapper.h"
35
36
37 // BlobHandler constructor
BlobHandler(int colId,int fieldNo)38 BlobHandler::BlobHandler(int colId, int fieldNo) :
39 ndbBlob(0),
40 next(0),
41 content(0),
42 length(0),
43 columnId(colId),
44 fieldNumber(fieldNo)
45 {
46 }
47
48
49 // Helper functions for BlobReadHandler
blobHandlerActiveHook(NdbBlob * ndbBlob,void * handler)50 int blobHandlerActiveHook(NdbBlob * ndbBlob, void * handler) {
51 BlobReadHandler * blobHandler = static_cast<BlobReadHandler *>(handler);
52 return blobHandler->runActiveHook(ndbBlob);
53 }
54
freeBufferContentsFromJs(char * data,void *)55 void freeBufferContentsFromJs(char *data, void *) {
56 DEBUG_PRINT("Free %p", data);
57 free(data); // here is free
58 }
59
60
61 // BlobReadHandler methods
prepare(const NdbOperation * ndbop)62 void BlobReadHandler::prepare(const NdbOperation * ndbop) {
63 ndbBlob = ndbop->getBlobHandle(columnId);
64 assert(ndbBlob);
65 ndbBlob->setActiveHook(blobHandlerActiveHook, this);
66
67 if(next) next->prepare(ndbop);
68 }
69
runActiveHook(NdbBlob * b)70 int BlobReadHandler::runActiveHook(NdbBlob *b) {
71 assert(b == ndbBlob);
72 int isNull;
73 ndbBlob->getNull(isNull);
74 if(! isNull) {
75 ndbBlob->getLength(length);
76 uint32_t nBytes = static_cast<uint32_t>(length);
77 content = (char *) malloc(length); // here is malloc
78 if(content) {
79 int rv = ndbBlob->readData(content, nBytes);
80 DEBUG_PRINT("BLOB read: column %d, length %llu, read %d/%d",
81 columnId, length, rv, nBytes);
82 } else {
83 return -1;
84 }
85 }
86 return 0;
87 }
88
getResultBuffer(v8::Isolate * iso)89 v8::Local<v8::Object> BlobReadHandler::getResultBuffer(v8::Isolate * iso) {
90 v8::Local<v8::Object> buffer;
91 if(content) {
92 buffer = LOCAL_BUFFER(node::Buffer::New(iso, content, length, freeBufferContentsFromJs, 0));
93 /* Content belongs to someone else now; clear it for the next user */
94 content = 0;
95 length = 0;
96 }
97 return buffer;
98 }
99
100
101 // BlobWriteHandler methods
102
BlobWriteHandler(int colId,int fieldNo,v8::Handle<v8::Object> blobValue)103 BlobWriteHandler::BlobWriteHandler(int colId, int fieldNo,
104 v8::Handle<v8::Object> blobValue) :
105 BlobHandler(colId, fieldNo)
106 {
107 length = node::Buffer::Length(blobValue);
108 content = node::Buffer::Data(blobValue);
109 }
110
prepare(const NdbOperation * ndbop)111 void BlobWriteHandler::prepare(const NdbOperation * ndbop) {
112 ndbBlob = ndbop->getBlobHandle(columnId);
113 if(! ndbBlob) {
114 DEBUG_PRINT("getBlobHandle %d: [%d] %s", columnId,
115 ndbop->getNdbError().code, ndbop->getNdbError().message);
116 assert(false);
117 }
118
119 DEBUG_PRINT("Prepare write for BLOB column %d, length %llu", columnId, length);
120 ndbBlob->setValue(content, static_cast<uint32_t>(length));
121 if(next) next->prepare(ndbop);
122 }
123
124