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| version 1.4, 2008/06/24 17:46:57 | version 1.14, 2017/01/13 16:54:37 |
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| Line 25 | Line 25 |
| #endif | #endif |
| static char *lsplit(char *string, char delim) { | static char *lsplit(char *string, char delim) { |
| if(string) { | if(string) { |
| char *v=strchr(string, delim); | char *v=strchr(string, delim); |
| if(v) { | if(v) { |
| *v=0; | *v=0; |
| return v+1; | return v+1; |
| } | } |
| } | } |
| return 0; | return 0; |
| } | } |
| static char *lsplit(char **string_ref, char delim) { | static char *lsplit(char **string_ref, char delim) { |
| char *result=*string_ref; | char *result=*string_ref; |
| char *next=lsplit(*string_ref, delim); | char *next=lsplit(*string_ref, delim); |
| *string_ref=next; | *string_ref=next; |
| return result; | return result; |
| } | } |
| static void toupper_str(char *out, const char *in, size_t size) { | static void toupper_str(char *out, const char *in, size_t size) { |
| Line 51 struct Connection { | Line 51 struct Connection { |
| SQL_Driver_services* services; | SQL_Driver_services* services; |
| sqlite3* handle; | sqlite3* handle; |
| const char* cstrClientCharset; | const char* client_charset; |
| bool multi_statements; | |
| bool autocommit; | bool autocommit; |
| int busy_timeout; | |
| }; | }; |
| Line 77 public: | Line 79 public: |
| /** connect | /** connect |
| @param url | @param url |
| format: @b [localhost/]dbfile? | format: @b db-file|:memory:|temporary:? |
| ClientCharset=UTF-8& | autocommit=1& // =0 disable autocommit. in this case 1 connect == 1 transaction. |
| autocommit=1 | // or you can use begin/commit|rollback explicitly |
| multi_statements=0& // =1 allow many statements in 1 query | |
| ClientCharset=UTF-8 // will transcode to/from specified charset instead of UTF-8 (default for sqlite) | |
| */ | */ |
| void connect( | void connect( |
| char *url, | char *url, |
| SQL_Driver_services& services, | SQL_Driver_services& services, |
| void **connection_ref ///< output: Connection* | void **connection_ref ///< output: Connection* |
| ){ | ){ |
| int rc; | |
| Connection& connection=*(Connection *)services.malloc(sizeof(Connection)); | Connection& connection=*(Connection *)services.malloc(sizeof(Connection)); |
| *connection_ref=&connection; | |
| connection.services=&services; | connection.services=&services; |
| connection.cstrClientCharset=SQLITE_DEFAULT_CHARSET; | |
| connection.client_charset=SQLITE_DEFAULT_CHARSET; | |
| connection.multi_statements=false; | |
| connection.autocommit=true; | connection.autocommit=true; |
| connection.busy_timeout=4000; | |
| char *db = url; | char* db_path=0; |
| char *options = lsplit(db, '?'); | char* db=url; |
| char* options=lsplit(db, '?'); | |
| if(strcmp(db, ":memory:")==0){ // in-memory temporary DB | |
| db_path=db; | |
| } else if(strcmp(db, ":temporary:")==0){ // on-disk temporary DB | |
| // do nothing: empty path mean temporary table on disk | |
| } else { | |
| char* document_root=(char*)services.request_document_root(); | |
| if(!document_root) // path to DB-file which was specified by user is path from document_root as anywhere in parser | |
| services._throw("document_root is empty"); | |
| db_path=(char*)services.malloc_atomic(strlen(document_root)+1+strlen(db)+1); | |
| strcpy(db_path, document_root); | |
| strcat(db_path, "/"); | |
| strcat(db_path, db); | |
| } | |
| char *db_path=(char*)services.malloc(strlen((char*)services.request_document_root()) + strlen(db) + 2); | //services._throw(db_path); |
| db_path=strncat(db_path, (char*)services.request_document_root(), MAX_STRING); | |
| db_path+="/"; | |
| db_path=strncat(db_path, db, MAX_STRING); | |
| while(options) { | while(options){ |
| if(char *key=lsplit(&options, '&')) { | if(char* key=lsplit(&options, '&')){ |
| if(*key) { | if(*key) { |
| if(char *value=lsplit(key, '=')) { | if(char* value=lsplit(key, '=')){ |
| if(strcmp(key, "ClientCharset" )==0) { // transcoding with parser | if(strcasecmp(key, "multi_statements")==0){ |
| toupper_str(value, value, strlen(value)); | if(atoi(value)!=0) |
| connection.cstrClientCharset=value; | connection.multi_statements=true; |
| continue; | } else if(strcasecmp(key, "busy_timeout")==0){ |
| } else if(strcasecmp(key, "autocommit")==0) { | connection.busy_timeout=atoi(value); |
| } else if(strcasecmp(key, "autocommit")==0){ | |
| if(atoi(value)==0) | if(atoi(value)==0) |
| connection.autocommit=false; | connection.autocommit=false; |
| continue; | } else if(strcmp(key, "ClientCharset")==0){ |
| toupper_str(value, value, strlen(value)); | |
| connection.client_charset=value; | |
| } else | } else |
| services._throw("unknown connect option" /*key*/); | services._throw("unknown connect option" /*key*/); |
| } else | } else |
| Line 123 public: | Line 145 public: |
| } | } |
| // transcode database_name from $request:charset to UTF-8 | // transcode database_name from $request:charset to UTF-8 |
| size_t transcoded_db_path_size; | if(db_path && _transcode_required(connection, SQLITE_DEFAULT_CHARSET)){ |
| const char* sdb = db_path; | size_t length=strlen(db_path); |
| services.transcode(sdb, strlen(db_path), | services.transcode((const char*)db_path, length, |
| sdb, transcoded_db_path_size, | (const char*&)db_path, length, |
| services.request_charset(), | services.request_charset(), |
| SQLITE_DEFAULT_CHARSET); | SQLITE_DEFAULT_CHARSET); |
| rc = sqlite3_open(db_path, &connection.handle); | |
| if( SQLITE_OK != rc ){ | |
| const char* errmsg = sqlite3_errmsg(connection.handle); | |
| _throw(connection, errmsg); | |
| sqlite3_close(connection.handle); | |
| } | } |
| *connection_ref=&connection; | |
| if(!connection.autocommit) | |
| exec(connection, "SET AUTOCOMMIT=0"); | |
| } | |
| void exec(Connection& connection, const char* statement) { | int rc=sqlite3_open(db_path, &connection.handle); |
| char *zErr; | |
| int rc; | |
| rc=sqlite3_exec(connection.handle, statement, 0, 0, &zErr); | |
| if(rc!=SQLITE_OK){ | if(rc!=SQLITE_OK){ |
| _throw(connection, zErr); | const char* error_msg=sqlite3_errmsg(connection.handle); |
| sqlite3_free(zErr); // error? can't free memory after throw | sqlite3_close(connection.handle); |
| _throw(connection, error_msg); | |
| } | } |
| sqlite3_busy_timeout(connection.handle, connection.busy_timeout); | |
| _begin_transaction(connection); | |
| } | } |
| void disconnect(void *aconnection) { | void disconnect(void *aconnection){ |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| sqlite3_close(connection.handle); | sqlite3_close(connection.handle); |
| connection.handle=0; | connection.handle=0; |
| } | } |
| void commit(void *aconnection) { | void commit(void *aconnection){ |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| if(!connection.autocommit) | if(!connection.autocommit) |
| exec(connection, "COMMIT"); | _execute_cmd(connection, "COMMIT"); |
| _begin_transaction(connection); | |
| } | } |
| void rollback(void *aconnection) { | void rollback(void *aconnection){ |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| if(!connection.autocommit) | if(!connection.autocommit) |
| exec(connection, "ROLLBACK"); | _execute_cmd(connection, "ROLLBACK"); |
| _begin_transaction(connection); | |
| } | } |
| bool ping(void *aconnection) { | bool ping(void *aconnection){ |
| return true; // not needed | return true; // not needed |
| } | } |
| const char* quote(void *aconnection, const char *from, unsigned int length) { | // charset here is services.request_charset(), not connection.client_charset |
| // thus we can't use the sql server quoting support | |
| const char* quote(void *aconnection, const char *str, unsigned int length) | |
| { | |
| const char* from; | |
| const char* from_end=str+length; | |
| size_t quoted=0; | |
| for(from=str; from<from_end; from++){ | |
| if(*from=='\'') | |
| quoted++; | |
| } | |
| if(!quoted) | |
| return str; | |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| /* | char *result=(char*)connection.services->malloc_atomic(length + quoted + 1); |
| You must allocate the to buffer to be at least length*2+1 bytes long. | char *to = result; |
| In the worse case, each character may need to be encoded as using two bytes, | |
| and you need room for the terminating null byte. | for(from=str; from<from_end; from++){ |
| */ | if(*from=='\'') |
| char *result=(char*)connection.services->malloc_atomic(length*2+1); | *to++= '\''; // ' -> '' |
| char *to=result; | *to++=*from; |
| while(length--) { | |
| if(*from=='\'') { // ' -> '' | |
| *to++='\''; | |
| } else if(*from=='\"') { // " -> "" | |
| *to++='\"'; | |
| } | |
| *to++=*from++; | |
| } | } |
| *to=0; | *to=0; |
| return result; | return result; |
| } | } |
| void query(void *aconnection, | void query(void *aconnection, |
| const char *astatement, | const char *astatement, |
| size_t placeholders_count, Placeholder* placeholders, | size_t placeholders_count, Placeholder* placeholders, |
| unsigned long offset, unsigned long limit, | unsigned long offset, unsigned long limit, |
| SQL_Driver_query_event_handlers& handlers) { | SQL_Driver_query_event_handlers& handlers |
| ){ | |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| SQL_Driver_services& services=*connection.services; | SQL_Driver_services& services=*connection.services; |
| const char* cstrClientCharset=connection.cstrClientCharset; | |
| if(placeholders_count>0) | if(placeholders_count>0) |
| _throw(connection, "bind variables not supported yet"); | services._throw("bind variables not supported yet"); |
| // transcode from $request:charset to ClientCharset | const char* request_charset=services.request_charset(); |
| if(cstrClientCharset) { | const char* client_charset=connection.client_charset; |
| size_t transcoded_statement_size; | bool transcode_needed=_transcode_required(connection); |
| services.transcode(astatement, strlen(astatement), | |
| astatement, transcoded_statement_size, | // transcode query from $request:charset to ?ClientCharset |
| services.request_charset(), | if(transcode_needed){ |
| cstrClientCharset); | size_t length=strlen(astatement); |
| services.transcode(astatement, length, | |
| astatement, length, | |
| request_charset, | |
| client_charset); | |
| } | } |
| const char *statement; | const char *statement; |
| if(offset || limit) { | if(offset || limit!=SQL_NO_LIMIT){ |
| size_t statement_size=strlen(astatement); | size_t statement_size=strlen(astatement); |
| char *statement_limited=(char *)services.malloc_atomic( | char *statement_limited=(char *)services.malloc_atomic( |
| statement_size+MAX_NUMBER*2+8/* limit #,#*/+1); | statement_size+MAX_NUMBER*2+8/* LIMIT #,#*/+1); |
| char *cur=statement_limited; | char *cur=statement_limited; |
| memcpy(cur, astatement, statement_size); cur+=statement_size; | memcpy(cur, astatement, statement_size); |
| cur+=sprintf(cur, " limit "); | cur+=statement_size; |
| cur+=sprintf(cur, " LIMIT "); | |
| if(offset) | if(offset) |
| cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset); | cur+=snprintf(cur, MAX_NUMBER+1, "%lu,", offset); |
| if(limit) | if(limit!=SQL_NO_LIMIT) |
| cur+=snprintf(cur, MAX_NUMBER, "%u", limit); | cur+=snprintf(cur, MAX_NUMBER, "%lu", limit); |
| statement=statement_limited; | statement=statement_limited; |
| } else | } else |
| statement=astatement; | statement=astatement; |
| const char *pzTail; | const char *pzTail; |
| int next_statement_length=0; | |
| sqlite3_stmt *SQL; | sqlite3_stmt *SQL; |
| int rc; | int rc; |
| int i; | |
| SQL_Error sql_error; | SQL_Error sql_error; |
| bool failed = false; | bool failed=false; |
| do{ // cycling through SQL commands | do{ // cycling through SQL commands |
| rc=sqlite3_prepare(connection.handle, statement, -1, &SQL, &pzTail); | |
| rc = sqlite3_prepare(connection.handle, statement, -1, &SQL, &pzTail); | next_statement_length=strlen(pzTail); |
| if(rc!=SQLITE_OK){ | if(rc!=SQLITE_OK){ |
| //sqlite3_free((char*)pzTail); | |
| _throw(connection, sqlite3_errmsg(connection.handle)); | _throw(connection, sqlite3_errmsg(connection.handle)); |
| sqlite3_free(pzTail); // error? can't free memory after throw | } |
| if(!connection.multi_statements && next_statement_length>0){ // multi statements was not allowed but pzTail point to not empty one | |
| //sqlite3_free((char*)pzTail); | |
| _throw(connection, "multi statements are not allowed until opption ?multi_statements=1 in connect string is specified."); | |
| } | } |
| #define CHECK(afailed) if(afailed){ failed=true; goto cleanup; } | |
| #define CHECK(afailed) if(afailed) { failed=true; goto cleanup; } | int column_count=sqlite3_column_count(SQL); |
| int column_count = sqlite3_column_count(SQL); | |
| if(!column_count){ // empty result: insert|delete|update|... | if(!column_count){ // empty result: insert|delete|update|... |
| rc = sqlite3_step(SQL); | rc=sqlite3_step(SQL); |
| } else { | } else { |
| for(int i=0; i<column_count; i++){ | |
| for(i=0; i<column_count; i++){ | const char *column_name=sqlite3_column_name(SQL, i); |
| const char *column_name = sqlite3_column_name(SQL, i); | size_t length=strlen(column_name); |
| size_t length = strlen(column_name); | |
| char* strm=(char*)services.malloc_atomic(length+1); | char* strm=(char*)services.malloc_atomic(length+1); |
| memcpy(strm, column_name, length+1); | memcpy(strm, column_name, length+1); |
| const char* str = strm; | const char* str=strm; |
| // transcode to $request:charset from connect-string?ClientCharset | // transcode column name from ?ClientCharset to $request:charset |
| if(cstrClientCharset) { | if(transcode_needed){ |
| services.transcode(str, length, | services.transcode(str, length, |
| str, length, | str, length, |
| cstrClientCharset, | client_charset, |
| services.request_charset()); | request_charset); |
| } | } |
| CHECK(handlers.add_column(sql_error, (const char*)strm, length)); | CHECK(handlers.add_column(sql_error, (const char*)str, length)); |
| } | } |
| CHECK(handlers.before_rows(sql_error)); | CHECK(handlers.before_rows(sql_error)); |
| int column_type; | const char *str; |
| const unsigned char *str; | size_t length=0; |
| size_t length = 0; | |
| do{ | do{ |
| rc = sqlite3_step(SQL); | rc=sqlite3_step(SQL); |
| if( rc == SQLITE_ROW ){ // новая строка!! | if(rc==SQLITE_ROW){ // new line!! |
| CHECK(handlers.add_row(sql_error)); | CHECK(handlers.add_row(sql_error)); |
| for(i=0; i<column_count; i++){ | for(int i=0; i<column_count; i++){ |
| // SQLite allow to get value of any type using sqlite3_column_text function | |
| column_type = sqlite3_column_type(SQL, i); | bool transcode_value=false; |
| int column_type=sqlite3_column_type(SQL, i); | |
| // SQLite позволяет поле любого типа получить в виде строки через sqlite3_column_text | switch(column_type){ |
| // просто перекодирует если требуется | |
| // а парсер только строковые значения получает | |
| // но switch я всё-таки сделал - так, на будущее | |
| switch(column_type) { | |
| case SQLITE_TEXT: | |
| str=(const unsigned char*)sqlite3_column_text(SQL, i); | |
| length=strlen(str); | |
| break; | |
| case SQLITE_INTEGER: | |
| str=(const unsigned char*)sqlite3_column_text(SQL, i); | |
| length=strlen(str); | |
| break; | |
| case SQLITE_NULL: | case SQLITE_NULL: |
| str=NULL; | |
| length=0; | length=0; |
| str=NULL; | |
| break; | break; |
| default: | case SQLITE_BLOB: |
| str=(const unsigned char*)sqlite3_column_text(SQL, i); | str=(const char*)sqlite3_column_blob(SQL, i); |
| length=strlen(str); | length=(size_t)sqlite3_column_bytes(SQL, i); |
| break; | |
| case SQLITE_TEXT: // for text transcoding can be required | |
| default: // anything else? | |
| transcode_value=transcode_needed; | |
| case SQLITE_INTEGER: | |
| case SQLITE_FLOAT: | |
| str=(const char*)sqlite3_column_text(SQL, i); | |
| length=(size_t)sqlite3_column_bytes(SQL, i); | |
| break; | break; |
| } | } |
| if(length){ | if(length){ |
| char* strm=(char*)services.malloc_atomic(length+1); | char* strm=(char*)services.malloc_atomic(length+1); |
| memcpy(strm, str, length+1); | memcpy(strm, str, length); |
| str = strm; | strm[length]=0; |
| str=strm; | |
| // transcode to $request:charset from connect-string?ClientCharset | if(transcode_value){ |
| if(cstrClientCharset) { | // transcode cell value from ?ClientCharset to $request:charset |
| services.transcode(str, length, | services.transcode(str, length, |
| str, length, | str, length, |
| cstrClientCharset, | client_charset, |
| services.request_charset()); | request_charset); |
| } | } |
| } else | } else |
| str = 0; | str=0; |
| CHECK(handlers.add_row_cell(sql_error, str, length)); | CHECK(handlers.add_row_cell(sql_error, str, length)); |
| } | } |
| } | } |
| } while( rc == SQLITE_BUSY || rc == SQLITE_ROW ); | } while(rc==SQLITE_BUSY || rc==SQLITE_ROW); |
| } // if column | } |
| if( rc == SQLITE_ERROR || rc == SQLITE_MISUSE ){ | if(rc==SQLITE_ERROR || rc==SQLITE_MISUSE){ |
| _throw(connection, sqlite3_errmsg(connection.handle)); | _throw(connection, sqlite3_errmsg(connection.handle)); |
| } | } |
| cleanup: | cleanup: |
| sqlite3_finalize(SQL); | sqlite3_finalize(SQL); |
| statement = pzTail; | statement=pzTail; |
| } while (strlen(pzTail) > 0); | } while (next_statement_length>0); |
| if(failed) | if(failed) |
| _throw(connection, sql_error); | services._throw(sql_error); |
| } | } |
| private: | private: |
| void _throw(Connection& connection, const char* aerr_msg) { | void _begin_transaction(Connection& connection) { |
| size_t err_length=strlen(aerr_msg); | if(!connection.autocommit){ |
| if(err_length && connection.cstrClientCharset) { | _execute_cmd(connection, "BEGIN"); |
| connection.services->transcode(aerr_msg, err_length, | } |
| aerr_msg, err_length, | } |
| connection.cstrClientCharset, | |
| connection.services->request_charset()); | void _execute_cmd(Connection& connection, const char* statement){ |
| } | char* zErr; |
| connection.services->_throw(aerr_msg); | int rc=sqlite3_exec(connection.handle, statement, 0, 0, &zErr); |
| } | if(rc!=SQLITE_OK){ |
| size_t length=strlen(zErr); | |
| char* err_msg=(char *)connection.services->malloc_atomic(length+1); | |
| memcpy(err_msg, zErr, length); | |
| sqlite3_free(zErr); | |
| _throw(connection, err_msg); | |
| } | |
| } | |
| void _throw(Connection& connection, const char* aerr_msg){ | |
| size_t length=strlen(aerr_msg); | |
| if(length && _transcode_required(connection)){ | |
| // transcode server error message from ?ClientCharset to $request:charset | |
| connection.services->transcode(aerr_msg, length, | |
| aerr_msg, length, | |
| connection.client_charset, | |
| connection.services->request_charset()); | |
| } | |
| connection.services->_throw(aerr_msg); | |
| } | |
| bool _transcode_required(Connection& connection, const char* charset=0){ | |
| return (strcmp(charset?charset:connection.client_charset, connection.services->request_charset())!=0); | |
| } | |
| private: // sqlite client library funcs | private: // sqlite client library funcs |
| Line 374 private: // sqlite client library funcs | Line 426 private: // sqlite client library funcs |
| typedef int (*t_sqlite3_close)(sqlite3 *); t_sqlite3_close sqlite3_close; | typedef int (*t_sqlite3_close)(sqlite3 *); t_sqlite3_close sqlite3_close; |
| typedef int (*t_sqlite3_busy_timeout)(sqlite3*, int ms); t_sqlite3_busy_timeout sqlite3_busy_timeout; | |
| typedef int (*t_sqlite3_exec)(sqlite3*, const char *sql, sqlite3_callback, void *, char **errmsg); t_sqlite3_exec sqlite3_exec; | typedef int (*t_sqlite3_exec)(sqlite3*, const char *sql, sqlite3_callback, void *, char **errmsg); t_sqlite3_exec sqlite3_exec; |
| typedef void (*t_sqlite3_free)(char *z); t_sqlite3_free sqlite3_free; | typedef void (*t_sqlite3_free)(char *z); t_sqlite3_free sqlite3_free; |
| Line 394 private: // sqlite client library funcs | Line 448 private: // sqlite client library funcs |
| typedef const unsigned char *(* t_sqlite3_column_text)(sqlite3_stmt*, int iCol); t_sqlite3_column_text sqlite3_column_text; | typedef const unsigned char *(* t_sqlite3_column_text)(sqlite3_stmt*, int iCol); t_sqlite3_column_text sqlite3_column_text; |
| typedef const unsigned char *(* t_sqlite3_column_blob)(sqlite3_stmt*, int iCol); t_sqlite3_column_blob sqlite3_column_blob; | |
| typedef int (* t_sqlite3_column_bytes)(sqlite3_stmt*, int iCol); t_sqlite3_column_bytes sqlite3_column_bytes; | |
| private: // sqlite client library funcs linking | private: // sqlite client library funcs linking |
| const char *dlink(const char *dlopen_file_spec) { | const char *dlink(const char *dlopen_file_spec) { |
| if(lt_dlinit()) | if(lt_dlinit()){ |
| return lt_dlerror(); | if(const char* result=lt_dlerror()) |
| lt_dlhandle handle=lt_dlopen(dlopen_file_spec); | return result; |
| if (!handle) { | return "can not prepare to dynamic loading"; |
| if(const char* result=lt_dlerror()) | } |
| return result; | |
| lt_dlhandle handle=lt_dlopen(dlopen_file_spec); | |
| if(!handle){ | |
| if(const char* result=lt_dlerror()) | |
| return result; | |
| return "can not open the dynamic link module"; | return "can not open the dynamic link module"; |
| } | } |
| Line 417 private: // sqlite client library funcs | Line 480 private: // sqlite client library funcs |
| DLINK(sqlite3_open); | DLINK(sqlite3_open); |
| DLINK(sqlite3_close); | DLINK(sqlite3_close); |
| DLINK(sqlite3_busy_timeout); | |
| DLINK(sqlite3_exec); | DLINK(sqlite3_exec); |
| DLINK(sqlite3_free); | DLINK(sqlite3_free); |
| DLINK(sqlite3_errmsg); | DLINK(sqlite3_errmsg); |
| Line 427 private: // sqlite client library funcs | Line 491 private: // sqlite client library funcs |
| DLINK(sqlite3_step); | DLINK(sqlite3_step); |
| DLINK(sqlite3_column_type); | DLINK(sqlite3_column_type); |
| DLINK(sqlite3_column_text); | DLINK(sqlite3_column_text); |
| DLINK(sqlite3_column_blob); | |
| DLINK(sqlite3_column_bytes); | |
| return 0; | return 0; |
| } | } |