Mercurial > hg > orthanc-databases
annotate Framework/MySQL/MySQLDatabase.cpp @ 67:714c5d2bee76
preparing for 2019
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 24 Dec 2018 13:35:26 +0100 |
parents | 412e30336847 |
children | e26690365c25 |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
67 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "MySQLDatabase.h" | |
23 | |
24 #include "MySQLResult.h" | |
25 #include "MySQLStatement.h" | |
26 #include "MySQLTransaction.h" | |
23
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27 #include "../Common/ImplicitTransaction.h" |
0 | 28 #include "../Common/Integer64Value.h" |
29 | |
30 #include <Core/Logging.h> | |
31 #include <Core/OrthancException.h> | |
32 #include <Core/Toolbox.h> | |
33 | |
6 | 34 #include <errmsg.h> |
0 | 35 #include <mysqld_error.h> |
36 | |
37 #include <memory> | |
38 | |
39 namespace OrthancDatabases | |
40 { | |
41 void MySQLDatabase::Close() | |
42 { | |
43 if (mysql_ != NULL) | |
44 { | |
45 LOG(INFO) << "Closing connection to MySQL database"; | |
46 mysql_close(mysql_); | |
47 mysql_ = NULL; | |
48 } | |
49 } | |
50 | |
51 | |
52 void MySQLDatabase::CheckErrorCode(int code) | |
53 { | |
54 if (code == 0) | |
55 { | |
56 return; | |
57 } | |
58 else | |
59 { | |
60 LogError(); | |
61 | |
62 unsigned int error = mysql_errno(mysql_); | |
63 if (error == CR_SERVER_GONE_ERROR || | |
64 error == CR_SERVER_LOST || | |
65 error == ER_QUERY_INTERRUPTED) | |
66 { | |
67 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
68 } | |
69 else | |
70 { | |
71 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
72 } | |
73 } | |
74 } | |
75 | |
76 | |
77 MySQLDatabase::MySQLDatabase(const MySQLParameters& parameters) : | |
78 parameters_(parameters), | |
79 mysql_(NULL) | |
80 { | |
81 } | |
82 | |
83 | |
46
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84 MySQLDatabase::~MySQLDatabase() |
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85 { |
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86 try |
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87 { |
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88 Close(); |
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89 } |
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90 catch (Orthanc::OrthancException&) |
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91 { |
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92 // Ignore possible exceptions due to connection loss |
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93 } |
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94 } |
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95 |
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96 |
0 | 97 void MySQLDatabase::LogError() |
98 { | |
99 if (mysql_ != NULL) | |
100 { | |
101 LOG(ERROR) << "MySQL error (" << mysql_errno(mysql_) | |
102 << "," << mysql_sqlstate(mysql_) | |
103 << "): " << mysql_error(mysql_); | |
104 } | |
105 } | |
106 | |
107 | |
108 MYSQL* MySQLDatabase::GetObject() | |
109 { | |
110 if (mysql_ == NULL) | |
111 { | |
112 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
113 } | |
114 else | |
115 { | |
116 return mysql_; | |
117 } | |
118 } | |
119 | |
120 | |
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121 void MySQLDatabase::OpenInternal(const char* db) |
0 | 122 { |
123 if (mysql_ != NULL) | |
124 { | |
125 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
126 } | |
127 | |
128 mysql_ = mysql_init(NULL); | |
129 if (mysql_ == NULL) | |
130 { | |
131 LOG(ERROR) << "Cannot initialize the MySQL connector"; | |
132 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
133 } | |
46
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134 |
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135 if (parameters_.GetUnixSocket().empty()) |
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136 { |
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137 // Fallback to TCP connection if no UNIX socket is provided |
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138 unsigned int protocol = MYSQL_PROTOCOL_TCP; |
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139 mysql_options(mysql_, MYSQL_OPT_PROTOCOL, (unsigned int *) &protocol); |
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140 } |
0 | 141 |
142 const char* socket = (parameters_.GetUnixSocket().empty() ? NULL : | |
143 parameters_.GetUnixSocket().c_str()); | |
144 | |
145 if (mysql_real_connect(mysql_, | |
146 parameters_.GetHost().c_str(), | |
147 parameters_.GetUsername().c_str(), | |
148 parameters_.GetPassword().c_str(), db, | |
149 parameters_.GetPort(), socket, 0) == 0) | |
150 { | |
151 LogError(); | |
152 Close(); | |
153 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
154 } | |
155 else | |
156 { | |
157 LOG(INFO) << "Successful connection to MySQL database"; | |
158 } | |
159 | |
160 if (mysql_set_character_set(mysql_, "utf8mb4") != 0) | |
161 { | |
162 LOG(ERROR) << "Cannot set the character set to UTF8"; | |
163 Close(); | |
164 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
165 } | |
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166 } |
0 | 167 |
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168 |
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169 void MySQLDatabase::Open() |
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170 { |
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171 if (parameters_.GetDatabase().empty()) |
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172 { |
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173 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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174 } |
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175 else |
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176 { |
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177 OpenInternal(parameters_.GetDatabase().c_str()); |
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178 } |
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179 } |
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180 |
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181 |
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182 void MySQLDatabase::ClearDatabase(const MySQLParameters& parameters) |
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183 { |
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184 MySQLDatabase db(parameters); |
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185 db.OpenRoot(); |
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186 |
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187 const std::string& database = parameters.GetDatabase(); |
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188 |
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189 { |
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190 MySQLTransaction t(db); |
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191 |
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192 if (!db.DoesDatabaseExist(t, database)) |
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193 { |
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194 LOG(ERROR) << "Inexistent database, please create it first: " << database; |
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195 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource); |
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196 } |
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197 |
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198 db.Execute("DROP DATABASE " + database, false); |
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199 db.Execute("CREATE DATABASE " + database, false); |
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200 t.Commit(); |
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201 } |
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202 } |
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203 |
0 | 204 |
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205 namespace |
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206 { |
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207 class ResultWrapper : public boost::noncopyable |
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208 { |
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209 private: |
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210 MYSQL_RES *result_; |
0 | 211 |
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212 public: |
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213 ResultWrapper(MySQLDatabase& mysql, |
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214 const std::string& sql) : |
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215 result_(NULL) |
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216 { |
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217 if (mysql_real_query(mysql.GetObject(), sql.c_str(), sql.size())) |
0 | 218 { |
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219 mysql.LogError(); |
0 | 220 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
221 } | |
222 | |
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223 result_ = mysql_use_result(mysql.GetObject()); |
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224 if (result_ == NULL) |
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225 { |
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226 mysql.LogError(); |
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227 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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228 } |
0 | 229 } |
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230 |
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231 ~ResultWrapper() |
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232 { |
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233 if (result_ != NULL) |
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234 { |
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235 mysql_free_result(result_); |
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236 result_ = NULL; |
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237 } |
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238 } |
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239 |
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240 MYSQL_RES *GetObject() |
0 | 241 { |
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242 return result_; |
0 | 243 } |
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244 }; |
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245 } |
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246 |
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247 |
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248 bool MySQLDatabase::LookupGlobalStringVariable(std::string& value, |
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249 const std::string& variable) |
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250 { |
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251 ResultWrapper result(*this, "SELECT @@global." + variable); |
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252 |
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253 MYSQL_ROW row = mysql_fetch_row(result.GetObject()); |
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254 if (mysql_errno(mysql_) == 0 && |
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255 row && |
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256 row[0]) |
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257 { |
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258 value = std::string(row[0]); |
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259 return true; |
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260 } |
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261 else |
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262 { |
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263 return false; |
0 | 264 } |
265 } | |
266 | |
267 | |
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268 bool MySQLDatabase::LookupGlobalIntegerVariable(int64_t& value, |
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269 const std::string& variable) |
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270 { |
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271 std::string s; |
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272 |
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273 if (LookupGlobalStringVariable(s, variable)) |
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274 { |
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275 try |
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276 { |
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277 value = boost::lexical_cast<int64_t>(s); |
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278 return true; |
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279 } |
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280 catch (boost::bad_lexical_cast&) |
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281 { |
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282 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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283 } |
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284 } |
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285 else |
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286 { |
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287 return false; |
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288 } |
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289 } |
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290 |
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291 |
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292 void MySQLDatabase::AdvisoryLock(int32_t lock) |
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293 { |
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294 try |
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295 { |
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296 Query query("SELECT GET_LOCK('Lock" + |
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297 boost::lexical_cast<std::string>(lock) + "', 0);", false); |
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298 MySQLStatement statement(*this, query); |
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299 |
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300 MySQLTransaction t(*this); |
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301 Dictionary args; |
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302 |
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303 std::auto_ptr<IResult> result(t.Execute(statement, args)); |
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304 |
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305 if (result->IsDone() || |
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306 result->GetField(0).GetType() != ValueType_Integer64 || |
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307 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() != 1) |
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308 { |
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309 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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310 } |
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311 |
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312 t.Commit(); |
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313 } |
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314 catch (Orthanc::OrthancException&) |
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315 { |
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316 LOG(ERROR) << "The MySQL database is locked by another instance of Orthanc"; |
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317 Close(); |
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318 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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319 } |
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320 } |
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321 |
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322 |
0 | 323 bool MySQLDatabase::DoesTableExist(MySQLTransaction& transaction, |
324 const std::string& name) | |
325 { | |
326 if (mysql_ == NULL) | |
327 { | |
328 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
329 } | |
330 | |
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331 if (!IsValidDatabaseIdentifier(name)) |
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332 { |
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333 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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334 } |
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335 |
0 | 336 Query query("SELECT COUNT(*) FROM information_schema.TABLES WHERE " |
337 "(TABLE_SCHEMA = ${database}) AND (TABLE_NAME = ${table})", true); | |
338 query.SetType("database", ValueType_Utf8String); | |
339 query.SetType("table", ValueType_Utf8String); | |
340 | |
341 MySQLStatement statement(*this, query); | |
342 | |
343 Dictionary args; | |
344 args.SetUtf8Value("database", parameters_.GetDatabase()); | |
345 args.SetUtf8Value("table", name); | |
346 | |
347 std::auto_ptr<IResult> result(statement.Execute(transaction, args)); | |
348 return (!result->IsDone() && | |
349 result->GetFieldsCount() == 1 && | |
350 result->GetField(0).GetType() == ValueType_Integer64 && | |
351 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() == 1); | |
352 } | |
353 | |
354 | |
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355 bool MySQLDatabase::DoesDatabaseExist(MySQLTransaction& transaction, |
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356 const std::string& name) |
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357 { |
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358 if (mysql_ == NULL) |
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359 { |
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360 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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361 } |
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362 |
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363 if (!IsValidDatabaseIdentifier(name)) |
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364 { |
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365 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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366 } |
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367 |
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368 Query query("SELECT COUNT(*) FROM information_schema.SCHEMATA " |
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369 "WHERE SCHEMA_NAME = ${database}", true); |
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370 query.SetType("database", ValueType_Utf8String); |
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371 |
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372 MySQLStatement statement(*this, query); |
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373 |
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374 Dictionary args; |
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375 args.SetUtf8Value("database", name); |
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376 |
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377 std::auto_ptr<IResult> result(statement.Execute(transaction, args)); |
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378 return (!result->IsDone() && |
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379 result->GetFieldsCount() == 1 && |
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380 result->GetField(0).GetType() == ValueType_Integer64 && |
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381 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() == 1); |
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382 } |
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383 |
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384 |
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385 void MySQLDatabase::Execute(const std::string& sql, |
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386 bool arobaseSeparator) |
0 | 387 { |
388 if (mysql_ == NULL) | |
389 { | |
390 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
391 } | |
392 | |
393 // This emulates the behavior of "CLIENT_MULTI_STATEMENTS" in | |
394 // "mysql_real_connect()", avoiding to implement a loop over | |
395 // "mysql_query()" | |
396 std::vector<std::string> commands; | |
397 Orthanc::Toolbox::TokenizeString(commands, sql, ';'); | |
398 | |
399 for (size_t i = 0; i < commands.size(); i++) | |
400 { | |
401 std::string s = Orthanc::Toolbox::StripSpaces(commands[i]); | |
402 | |
403 if (!s.empty()) | |
404 { | |
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405 if (arobaseSeparator) |
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406 { |
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407 // Replace the escape character "@" by a semicolon |
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408 std::replace(s.begin(), s.end(), '@', ';'); |
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409 } |
0 | 410 |
411 LOG(TRACE) << "MySQL: " << s; | |
412 CheckErrorCode(mysql_query(mysql_, s.c_str())); | |
413 } | |
414 } | |
415 } | |
416 | |
417 | |
418 IPrecompiledStatement* MySQLDatabase::Compile(const Query& query) | |
419 { | |
420 if (mysql_ == NULL) | |
421 { | |
422 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
423 } | |
424 | |
425 return new MySQLStatement(*this, query); | |
426 } | |
427 | |
428 | |
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429 |
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430 namespace |
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431 { |
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432 class MySQLImplicitTransaction : public ImplicitTransaction |
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433 { |
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434 private: |
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435 MySQLDatabase& db_; |
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436 |
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437 protected: |
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438 virtual IResult* ExecuteInternal(IPrecompiledStatement& statement, |
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439 const Dictionary& parameters) |
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440 { |
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441 return dynamic_cast<MySQLStatement&>(statement).Execute(*this, parameters); |
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442 } |
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443 |
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444 virtual void ExecuteWithoutResultInternal(IPrecompiledStatement& statement, |
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445 const Dictionary& parameters) |
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446 { |
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447 dynamic_cast<MySQLStatement&>(statement).ExecuteWithoutResult(*this, parameters); |
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448 } |
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449 |
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450 public: |
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451 MySQLImplicitTransaction(MySQLDatabase& db) : |
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452 db_(db) |
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453 { |
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454 } |
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455 }; |
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456 } |
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457 |
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458 |
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459 ITransaction* MySQLDatabase::CreateTransaction(bool isImplicit) |
0 | 460 { |
461 if (mysql_ == NULL) | |
462 { | |
463 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
464 } | |
465 | |
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466 if (isImplicit) |
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467 { |
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468 return new MySQLImplicitTransaction(*this); |
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469 } |
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470 else |
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471 { |
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472 return new MySQLTransaction(*this); |
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473 } |
0 | 474 } |
475 | |
476 | |
477 void MySQLDatabase::GlobalFinalization() | |
478 { | |
479 mysql_library_end(); | |
480 } | |
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481 |
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482 |
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483 bool MySQLDatabase::IsValidDatabaseIdentifier(const std::string& s) |
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484 { |
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485 for (size_t i = 0; i < s.length(); i++) |
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486 { |
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487 // https://dev.mysql.com/doc/refman/8.0/en/identifiers.html |
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488 if (!isalnum(s[i]) && |
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489 s[i] != '$' && |
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490 s[i] != '_') |
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491 { |
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492 return false; |
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493 } |
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494 } |
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495 |
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496 return true; |
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497 } |
0 | 498 } |