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todo_api/api.php
Maurits van der Schee ef5ec1f715 Renamed filterInputByColumns
2016-02-01 01:43:35 +01:00

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PHP
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<?php
class MySQL_CRUD_API extends REST_CRUD_API {
protected $queries = array(
'reflect_table'=>'SELECT "TABLE_NAME" FROM "INFORMATION_SCHEMA"."TABLES" WHERE "TABLE_NAME" LIKE ? AND "TABLE_SCHEMA" = ?',
'reflect_pk'=>'SELECT "COLUMN_NAME" FROM "INFORMATION_SCHEMA"."COLUMNS" WHERE "COLUMN_KEY" = \'PRI\' AND "TABLE_NAME" = ? AND "TABLE_SCHEMA" = ?',
'reflect_belongs_to'=>'SELECT
"TABLE_NAME","COLUMN_NAME",
"REFERENCED_TABLE_NAME","REFERENCED_COLUMN_NAME"
FROM
"INFORMATION_SCHEMA"."KEY_COLUMN_USAGE"
WHERE
"TABLE_NAME" = ? AND
"REFERENCED_TABLE_NAME" IN ? AND
"TABLE_SCHEMA" = ? AND
"REFERENCED_TABLE_SCHEMA" = ?',
'reflect_has_many'=>'SELECT
"TABLE_NAME","COLUMN_NAME",
"REFERENCED_TABLE_NAME","REFERENCED_COLUMN_NAME"
FROM
"INFORMATION_SCHEMA"."KEY_COLUMN_USAGE"
WHERE
"TABLE_NAME" IN ? AND
"REFERENCED_TABLE_NAME" = ? AND
"TABLE_SCHEMA" = ? AND
"REFERENCED_TABLE_SCHEMA" = ?',
'reflect_habtm'=>'SELECT
k1."TABLE_NAME", k1."COLUMN_NAME",
k1."REFERENCED_TABLE_NAME", k1."REFERENCED_COLUMN_NAME",
k2."TABLE_NAME", k2."COLUMN_NAME",
k2."REFERENCED_TABLE_NAME", k2."REFERENCED_COLUMN_NAME"
FROM
"INFORMATION_SCHEMA"."KEY_COLUMN_USAGE" k1, "INFORMATION_SCHEMA"."KEY_COLUMN_USAGE" k2
WHERE
k1."TABLE_SCHEMA" = ? AND
k2."TABLE_SCHEMA" = ? AND
k1."REFERENCED_TABLE_SCHEMA" = ? AND
k2."REFERENCED_TABLE_SCHEMA" = ? AND
k1."TABLE_NAME" = k2."TABLE_NAME" AND
k1."REFERENCED_TABLE_NAME" = ? AND
k2."REFERENCED_TABLE_NAME" IN ?'
);
protected function connectDatabase($hostname,$username,$password,$database,$port,$socket,$charset) {
$db = mysqli_connect($hostname,$username,$password,$database,$port,$socket);
if (mysqli_connect_errno()) {
throw new \Exception('Connect failed. '.mysqli_connect_error());
}
if (!mysqli_set_charset($db,$charset)) {
throw new \Exception('Error setting charset. '.mysqli_error($db));
}
if (!mysqli_query($db,'SET SESSION sql_mode = \'ANSI_QUOTES\';')) {
throw new \Exception('Error setting ANSI quotes. '.mysqli_error($db));
}
return $db;
}
protected function query($db,$sql,$params) {
$sql = preg_replace_callback('/\!|\?/', function ($matches) use (&$db,&$params) {
$param = array_shift($params);
if ($matches[0]=='!') return preg_replace('/[^a-zA-Z0-9\-_=<>]/','',$param);
if (is_array($param)) return '('.implode(',',array_map(function($v) use (&$db) {
return "'".mysqli_real_escape_string($db,$v)."'";
},$param)).')';
if (is_object($param) && $param->type=='base64') {
return "x'".bin2hex(base64_decode($param->data))."'";
}
if ($param===null) return 'NULL';
return "'".mysqli_real_escape_string($db,$param)."'";
}, $sql);
//echo "\n$sql\n";
return mysqli_query($db,$sql);
}
protected function fetch_assoc($result) {
return mysqli_fetch_assoc($result);
}
protected function fetch_row($result) {
return mysqli_fetch_row($result);
}
protected function insert_id($db,$result) {
return mysqli_insert_id($db);
}
protected function affected_rows($db,$result) {
return mysqli_affected_rows($db);
}
protected function close($result) {
return mysqli_free_result($result);
}
protected function fetch_fields($result) {
return mysqli_fetch_fields($result);
}
protected function add_limit_to_sql($sql,$limit,$offset) {
return "$sql LIMIT $limit OFFSET $offset";
}
protected function likeEscape($string) {
return addcslashes($string,'%_');
}
protected function is_binary_type($field) {
//echo "$field->name: $field->type ($field->flags)\n";
return (($field->flags & 128) && ($field->type>=249) && ($field->type<=252));
}
protected function base64_encode($string) {
return base64_encode($string);
}
protected function getDefaultCharset() {
return 'utf8';
}
}
class PgSQL_CRUD_API extends REST_CRUD_API {
protected $queries = array(
'reflect_table'=>'select "table_name" from "information_schema"."tables" where "table_name" like ? and "table_catalog" = ?',
'reflect_pk'=>'select
"column_name"
from
"information_schema"."table_constraints" tc, "information_schema"."key_column_usage" ku
where
tc."constraint_type" = \'PRIMARY KEY\' and
tc."constraint_name" = ku."constraint_name" and
ku."table_name" = ? and
ku."table_catalog" = ?',
'reflect_belongs_to'=>'select
cu1."table_name",cu1."column_name",
cu2."table_name",cu2."column_name"
from
"information_schema".referential_constraints rc,
"information_schema".key_column_usage cu1,
"information_schema".key_column_usage cu2
where
cu1."constraint_name" = rc."constraint_name" and
cu2."constraint_name" = rc."unique_constraint_name" and
cu1."table_name" = ? and
cu2."table_name" in ? and
cu1."table_catalog" = ? and
cu2."table_catalog" = ?',
'reflect_has_many'=>'select
cu1."table_name",cu1."column_name",
cu2."table_name",cu2."column_name"
from
"information_schema".referential_constraints rc,
"information_schema".key_column_usage cu1,
"information_schema".key_column_usage cu2
where
cu1."constraint_name" = rc."constraint_name" and
cu2."constraint_name" = rc."unique_constraint_name" and
cu1."table_name" in ? and
cu2."table_name" = ? and
cu1."table_catalog" = ? and
cu2."table_catalog" = ?',
'reflect_habtm'=>'select
cua1."table_name",cua1."column_name",
cua2."table_name",cua2."column_name",
cub1."table_name",cub1."column_name",
cub2."table_name",cub2."column_name"
from
"information_schema".referential_constraints rca,
"information_schema".referential_constraints rcb,
"information_schema".key_column_usage cua1,
"information_schema".key_column_usage cua2,
"information_schema".key_column_usage cub1,
"information_schema".key_column_usage cub2
where
cua1."constraint_name" = rca."constraint_name" and
cua2."constraint_name" = rca."unique_constraint_name" and
cub1."constraint_name" = rcb."constraint_name" and
cub2."constraint_name" = rcb."unique_constraint_name" and
cua1."table_catalog" = ? and
cub1."table_catalog" = ? and
cua2."table_catalog" = ? and
cub2."table_catalog" = ? and
cua1."table_name" = cub1."table_name" and
cua2."table_name" = ? and
cub2."table_name" in ?'
);
protected function connectDatabase($hostname,$username,$password,$database,$port,$socket,$charset) {
$e = function ($v) { return str_replace(array('\'','\\'),array('\\\'','\\\\'),$v); };
$conn_string = '';
if ($hostname || $socket) {
if ($socket) $hostname = $e($socket);
else $hostname = $e($hostname);
$conn_string.= " host='$hostname'";
}
if ($port) {
$port = ($port+0);
$conn_string.= " port='$port'";
}
if ($database) {
$database = $e($database);
$conn_string.= " dbname='$database'";
}
if ($username) {
$username = $e($username);
$conn_string.= " user='$username'";
}
if ($password) {
$password = $e($password);
$conn_string.= " password='$password'";
}
if ($charset) {
$charset = $e($charset);
$conn_string.= " options='--client_encoding=$charset'";
}
$db = pg_connect($conn_string);
return $db;
}
protected function query($db,$sql,$params) {
$sql = preg_replace_callback('/\!|\?/', function ($matches) use (&$db,&$params) {
$param = array_shift($params);
if ($matches[0]=='!') return preg_replace('/[^a-zA-Z0-9\-_=<>]/','',$param);
if (is_array($param)) return '('.implode(',',array_map(function($v) use (&$db) {
return "'".pg_escape_string($db,$v)."'";
},$param)).')';
if (is_object($param) && $param->type=='base64') {
return "'\x".bin2hex(base64_decode($param->data))."'";
}
if ($param===null) return 'NULL';
return "'".pg_escape_string($db,$param)."'";
}, $sql);
if (strtoupper(substr($sql,0,6))=='INSERT') {
$sql .= ' RETURNING id;';
}
//echo "\n$sql\n";
return @pg_query($db,$sql);
}
protected function fetch_assoc($result) {
return pg_fetch_assoc($result);
}
protected function fetch_row($result) {
return pg_fetch_row($result);
}
protected function insert_id($db,$result) {
list($id) = pg_fetch_row($result);
return (int)$id;
}
protected function affected_rows($db,$result) {
return pg_affected_rows($result);
}
protected function close($result) {
return pg_free_result($result);
}
protected function fetch_fields($result) {
$keys = array();
for($i=0;$i<pg_num_fields($result);$i++) {
$field = array();
$field['name'] = pg_field_name($result,$i);
$field['type'] = pg_field_type($result,$i);
$keys[$i] = (object)$field;
}
return $keys;
}
protected function add_limit_to_sql($sql,$limit,$offset) {
return "$sql LIMIT $limit OFFSET $offset";
}
protected function likeEscape($string) {
return addcslashes($string,'%_');
}
protected function is_binary_type($field) {
return $field->type == 'bytea';
}
protected function base64_encode($string) {
return base64_encode(hex2bin(substr($string,2)));
}
protected function getDefaultCharset() {
return 'UTF8';
}
}
class MsSQL_CRUD_API extends REST_CRUD_API {
protected $queries = array(
'reflect_table'=>'SELECT "TABLE_NAME" FROM "INFORMATION_SCHEMA"."TABLES" WHERE "TABLE_NAME" LIKE ? AND "TABLE_CATALOG" = ?',
'reflect_pk'=>'SELECT
"COLUMN_NAME"
FROM
"INFORMATION_SCHEMA"."TABLE_CONSTRAINTS" tc, "INFORMATION_SCHEMA"."KEY_COLUMN_USAGE" ku
WHERE
tc."CONSTRAINT_TYPE" = \'PRIMARY KEY\' AND
tc."CONSTRAINT_NAME" = ku."CONSTRAINT_NAME" AND
ku."TABLE_NAME" = ? AND
ku."TABLE_CATALOG" = ?',
'reflect_belongs_to'=>'SELECT
cu1."TABLE_NAME",cu1."COLUMN_NAME",
cu2."TABLE_NAME",cu2."COLUMN_NAME"
FROM
"INFORMATION_SCHEMA".REFERENTIAL_CONSTRAINTS rc,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cu1,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cu2
WHERE
cu1."CONSTRAINT_NAME" = rc."CONSTRAINT_NAME" AND
cu2."CONSTRAINT_NAME" = rc."UNIQUE_CONSTRAINT_NAME" AND
cu1."TABLE_NAME" = ? AND
cu2."TABLE_NAME" IN ? AND
cu1."TABLE_CATALOG" = ? AND
cu2."TABLE_CATALOG" = ?',
'reflect_has_many'=>'SELECT
cu1."TABLE_NAME",cu1."COLUMN_NAME",
cu2."TABLE_NAME",cu2."COLUMN_NAME"
FROM
"INFORMATION_SCHEMA".REFERENTIAL_CONSTRAINTS rc,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cu1,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cu2
WHERE
cu1."CONSTRAINT_NAME" = rc."CONSTRAINT_NAME" AND
cu2."CONSTRAINT_NAME" = rc."UNIQUE_CONSTRAINT_NAME" AND
cu1."TABLE_NAME" IN ? AND
cu2."TABLE_NAME" = ? AND
cu1."TABLE_CATALOG" = ? AND
cu2."TABLE_CATALOG" = ?',
'reflect_habtm'=>'SELECT
cua1."TABLE_NAME",cua1."COLUMN_NAME",
cua2."TABLE_NAME",cua2."COLUMN_NAME",
cub1."TABLE_NAME",cub1."COLUMN_NAME",
cub2."TABLE_NAME",cub2."COLUMN_NAME"
FROM
"INFORMATION_SCHEMA".REFERENTIAL_CONSTRAINTS rca,
"INFORMATION_SCHEMA".REFERENTIAL_CONSTRAINTS rcb,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cua1,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cua2,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cub1,
"INFORMATION_SCHEMA".CONSTRAINT_COLUMN_USAGE cub2
WHERE
cua1."CONSTRAINT_NAME" = rca."CONSTRAINT_NAME" AND
cua2."CONSTRAINT_NAME" = rca."UNIQUE_CONSTRAINT_NAME" AND
cub1."CONSTRAINT_NAME" = rcb."CONSTRAINT_NAME" AND
cub2."CONSTRAINT_NAME" = rcb."UNIQUE_CONSTRAINT_NAME" AND
cua1."TABLE_CATALOG" = ? AND
cub1."TABLE_CATALOG" = ? AND
cua2."TABLE_CATALOG" = ? AND
cub2."TABLE_CATALOG" = ? AND
cua1."TABLE_NAME" = cub1."TABLE_NAME" AND
cua2."TABLE_NAME" = ? AND
cub2."TABLE_NAME" IN ?'
);
protected function connectDatabase($hostname,$username,$password,$database,$port,$socket,$charset) {
$connectionInfo = array();
if ($port) $hostname.=','.$port;
if ($username) $connectionInfo['UID']=$username;
if ($password) $connectionInfo['PWD']=$password;
if ($database) $connectionInfo['Database']=$database;
if ($charset) $connectionInfo['CharacterSet']=$charset;
$connectionInfo['QuotedId']=1;
$connectionInfo['ReturnDatesAsStrings']=1;
$db = sqlsrv_connect($hostname, $connectionInfo);
if (!$db) {
throw new \Exception('Connect failed. '.print_r( sqlsrv_errors(), true));
}
if ($socket) {
throw new \Exception('Socket connection is not supported.');
}
return $db;
}
protected function query($db,$sql,$params) {
$args = array();
$sql = preg_replace_callback('/\!|\?/', function ($matches) use (&$db,&$params,&$args) {
static $i=-1;
$i++;
$param = $params[$i];
if ($matches[0]=='!') {
return preg_replace('/[^a-zA-Z0-9\-_=<>]/','',$param);
}
// This is workaround because SQLSRV cannot accept NULL in a param
if ($matches[0]=='?' && is_null($param)) {
return 'NULL';
}
if (is_array($param)) {
$args = array_merge($args,$param);
return '('.implode(',',str_split(str_repeat('?',count($param)))).')';
}
if (is_object($param)) {
switch($param->type) {
case 'base64':
$args[] = bin2hex(base64_decode($param->data));
return 'CONVERT(VARBINARY(MAX),?,2)';
}
}
$args[] = $param;
return '?';
}, $sql);
//var_dump($params);
//echo "\n$sql\n";
//var_dump($args);
if (strtoupper(substr($sql,0,6))=='INSERT') {
$sql .= ';SELECT SCOPE_IDENTITY()';
}
return sqlsrv_query($db,$sql,$args)?:null;
}
protected function fetch_assoc($result) {
$values = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC);
if ($values) $values = array_map(function($v){ return is_null($v)?null:(string)$v; },$values);
return $values;
}
protected function fetch_row($result) {
$values = sqlsrv_fetch_array($result, SQLSRV_FETCH_NUMERIC);
if ($values) $values = array_map(function($v){ return is_null($v)?null:(string)$v; },$values);
return $values;
}
protected function insert_id($db,$result) {
sqlsrv_next_result($result);
sqlsrv_fetch($result);
return (int)sqlsrv_get_field($result, 0);
}
protected function affected_rows($db,$result) {
return sqlsrv_rows_affected($result);
}
protected function close($result) {
return sqlsrv_free_stmt($result);
}
protected function fetch_fields($result) {
//var_dump(sqlsrv_field_metadata($result));
return array_map(function($a){
$p = array();
foreach ($a as $k=>$v) {
$p[strtolower($k)] = $v;
}
return (object)$p;
},sqlsrv_field_metadata($result));
}
protected function add_limit_to_sql($sql,$limit,$offset) {
return "$sql OFFSET $offset ROWS FETCH NEXT $limit ROWS ONLY";
}
protected function likeEscape($string) {
return str_replace(array('%','_'),array('[%]','[_]'),$string);
}
protected function is_binary_type($field) {
return ($field->type>=-4 && $field->type<=-2);
}
protected function base64_encode($string) {
return base64_encode($string);
}
protected function getDefaultCharset() {
return 'UTF-8';
}
}
class REST_CRUD_API {
protected $settings;
protected function mapMethodToAction($method,$key) {
switch ($method) {
case 'OPTIONS': $this->exitWithCorsHeaders();
case 'GET': return $key?'read':'list';
case 'PUT': return 'update';
case 'POST': return 'create';
case 'DELETE': return 'delete';
default: $this->exitWith404('method');
}
}
protected function parseRequestParameter(&$request,$characters,$default) {
if (!count($request)) return $default;
$value = array_shift($request);
return $characters?preg_replace("/[^$characters]/",'',$value):$value;
}
protected function parseGetParameter($get,$name,$characters,$default) {
$value = isset($get[$name])?$get[$name]:$default;
return $characters?preg_replace("/[^$characters]/",'',$value):$value;
}
protected function parseGetParameterArray($get,$name,$characters,$default) {
$values = isset($get[$name])?$get[$name]:$default;
if (!is_array($values)) $values = array($values);
if ($characters) {
foreach ($values as &$value) {
$value = preg_replace("/[^$characters]/",'',$value);
}
}
return $values;
}
protected function applyTableAuthorizer($callback,$action,$database,&$tables) {
if (is_callable($callback,true)) foreach ($tables as $i=>$table) {
if (!$callback($action,$database,$table)) {
if ($i) unset($tables[$i]);
else $this->exitWith404('entity');
}
}
}
protected function applyColumnAuthorizer($callback,$action,$database,&$fields) {
if (is_callable($callback,true)) foreach ($fields as $table=>$keys) {
foreach ($keys as $field) {
if (!$callback($action,$database,$table,$field->name)) {
unset($fields[$table][$field->name]);
}
}
}
}
protected function applyInputSanitizer($callback,$action,$database,$table,&$input,$keys) {
if (is_callable($callback,true)) foreach ((array)$input as $key=>$value) {
if (isset($keys[$key])) {
$input->$key = $callback($action,$database,$table,$key,$keys[$key]->type,$value);
}
}
}
protected function applyInputValidator($callback,$action,$database,$table,$input,$keys,$context) {
$errors = array();
if (is_callable($callback,true)) foreach ((array)$input as $key=>$value) {
if (isset($keys[$key])) {
$error = $callback($action,$database,$table,$key,$keys[$key]->type,$value,$context);
if ($error!==true && $error!==null) $errors[$key] = $error;
}
}
if (!empty($errors)) $this->exitWith422($errors);
}
protected function processTableParameter($database,$table,$db) {
if (in_array(strtolower($database), array('information_schema','mysql','sys','pg_catalog'))) return array();
$tablelist = explode(',',$table);
$tables = array();
foreach ($tablelist as $table) {
$table = str_replace('*','%',$table);
if ($result = $this->query($db,$this->queries['reflect_table'],array($table,$database))) {
while ($row = $this->fetch_row($result)) $tables[] = $row[0];
$this->close($result);
}
}
return $tables;
}
protected function findSinglePrimaryKey($tables,$database,$db) {
$keys = array();
if ($result = $this->query($db,$this->queries['reflect_pk'],array($tables[0],$database))) {
while ($row = $this->fetch_row($result)) $keys[] = $row[0];
$this->close($result);
}
return count($keys)==1?$keys[0]:false;
}
protected function exitWith404($type) {
if (isset($_SERVER['REQUEST_METHOD'])) {
header('Content-Type:',true,404);
die("Not found ($type)");
} else {
throw new \Exception("Not found ($type)");
}
}
protected function exitWith422($object) {
if (isset($_SERVER['REQUEST_METHOD'])) {
header('Content-Type:',true,422);
die(json_encode($object));
} else {
throw new \Exception(json_encode($object));
}
}
protected function exitWithCorsHeaders() {
$headers = array();
$headers[]='Access-Control-Allow-Headers: Content-Type';
$headers[]='Access-Control-Allow-Methods: OPTIONS, GET, PUT, POST, DELETE';
$headers[]='Access-Control-Max-Age: 1728000';
if (isset($_SERVER['REQUEST_METHOD'])) {
foreach ($headers as $header) header($header);
die();
} else {
throw new \Exception(json_encode($headers));
}
}
protected function startOutput($callback) {
if ($callback) {
if (isset($_SERVER['REQUEST_METHOD'])) {
header('Content-Type: application/javascript');
}
echo $callback.'(';
} else {
if (isset($_SERVER['REQUEST_METHOD'])) {
header('Content-Type: application/json');
}
}
}
protected function endOutput($callback) {
if ($callback) {
echo ');';
}
}
protected function processKeyParameter($key,$tables,$database,$db) {
if ($key) {
$key = array($key,$this->findSinglePrimaryKey($tables,$database,$db));
if ($key[1]===false) $this->exitWith404('1pk');
}
return $key;
}
protected function processOrderParameter($order) {
if ($order) {
$order = explode(',',$order,2);
if (count($order)<2) $order[1]='ASC';
$order[1] = strtoupper($order[1])=='DESC'?'DESC':'ASC';
}
return $order;
}
protected function processFilterParameter($filter,$db) {
if ($filter) {
$filter = explode(',',$filter,3);
if (count($filter)==3) {
$match = $filter[1];
$filter[1] = 'LIKE';
if ($match=='cs') $filter[2] = '%'.$this->likeEscape($filter[2]).'%';
if ($match=='sw') $filter[2] = $this->likeEscape($filter[2]).'%';
if ($match=='ew') $filter[2] = '%'.$this->likeEscape($filter[2]);
if ($match=='eq') $filter[1] = '=';
if ($match=='ne') $filter[1] = '<>';
if ($match=='lt') $filter[1] = '<';
if ($match=='le') $filter[1] = '<=';
if ($match=='ge') $filter[1] = '>=';
if ($match=='gt') $filter[1] = '>';
if ($match=='in') {
$filter[1] = 'IN';
$filter[2] = explode(',',$filter[2]);
}
} else {
$filter = false;
}
}
return $filter;
}
protected function processPageParameter($page) {
if ($page) {
$page = explode(',',$page,2);
if (count($page)<2) $page[1]=20;
$page[0] = ($page[0]-1)*$page[1];
}
return $page;
}
protected function retrieveObject($key,$fields,$tables,$db) {
if (!$key) return false;
$sql = 'SELECT ';
$sql .= '"'.implode('","',array_keys($fields[$tables[0]])).'"';
$sql .= ' FROM "!" WHERE "!" = ?';
if ($result = $this->query($db,$sql,array($tables[0],$key[1],$key[0]))) {
$object = $this->fetch_assoc($result);
foreach ($fields[$tables[0]] as $field) {
if ($this->is_binary_type($field) && $object[$field->name]) {
$object[$field->name] = $this->base64_encode($object[$field->name]);
}
}
$this->close($result);
}
return $object;
}
protected function createObject($input,$tables,$db) {
if (!$input) return false;
$input = (array)$input;
$keys = implode('","',str_split(str_repeat('!', count($input))));
$values = implode(',',str_split(str_repeat('?', count($input))));
$params = array_merge(array_keys($input),array_values($input));
array_unshift($params, $tables[0]);
$result = $this->query($db,'INSERT INTO "!" ("'.$keys.'") VALUES ('.$values.')',$params);
if (!$result) return null;
return $this->insert_id($db,$result);
}
protected function updateObject($key,$input,$tables,$db) {
if (!$input) return false;
$input = (array)$input;
$params = array();
$sql = 'UPDATE "!" SET ';
$params[] = $tables[0];
foreach (array_keys($input) as $i=>$k) {
if ($i) $sql .= ',';
$v = $input[$k];
$sql .= '"!"=?';
$params[] = $k;
$params[] = $v;
}
$sql .= ' WHERE "!"=?';
$params[] = $key[1];
$params[] = $key[0];
$result = $this->query($db,$sql,$params);
return $this->affected_rows($db, $result);
}
protected function deleteObject($key,$tables,$db) {
$result = $this->query($db,'DELETE FROM "!" WHERE "!" = ?',array($tables[0],$key[1],$key[0]));
return $this->affected_rows($db, $result);
}
protected function findRelations($tables,$database,$db) {
$collect = array();
$select = array();
if (count($tables)>1) {
$table0 = array_shift($tables);
$result = $this->query($db,$this->queries['reflect_belongs_to'],array($table0,$tables,$database,$database));
while ($row = $this->fetch_row($result)) {
$collect[$row[0]][$row[1]]=array();
$select[$row[2]][$row[3]]=array($row[0],$row[1]);
}
$result = $this->query($db,$this->queries['reflect_has_many'],array($tables,$table0,$database,$database));
while ($row = $this->fetch_row($result)) {
$collect[$row[2]][$row[3]]=array();
$select[$row[0]][$row[1]]=array($row[2],$row[3]);
}
$result = $this->query($db,$this->queries['reflect_habtm'],array($database,$database,$database,$database,$table0,$tables));
while ($row = $this->fetch_row($result)) {
$collect[$row[2]][$row[3]]=array();
$select[$row[0]][$row[1]]=array($row[2],$row[3]);
$collect[$row[4]][$row[5]]=array();
$select[$row[6]][$row[7]]=array($row[4],$row[5]);
}
}
return array($collect,$select);
}
protected function retrieveInput($post) {
$input = (object)array();
$data = trim(file_get_contents($post));
if (strlen($data)>0) {
if ($data[0]=='{') {
$input = json_decode($data);
} else {
parse_str($data, $input);
foreach ($input as $key => $value) {
if (substr($key,-9)=='__is_null') {
$input[substr($key,0,-9)] = null;
unset($input[$key]);
}
}
$input = (object)$input;
}
}
return $input;
}
protected function findFields($tables,$collect,$select,$columns,$database,$db) {
$tables = array_unique(array_merge($tables,array_keys($collect),array_keys($select)));
$fields = array();
foreach ($tables as $i=>$table) {
$fields[$table] = $this->findTableFields($table,$database,$db);
if ($i==0 && $columns) $fields[$table] = $this->filterFieldsByColumns($fields[$table],$columns);
}
return $fields;
}
protected function findInputFields($table,$columns,$database,$db) {
$fields = array();
$fields[$table] = $this->findTableFields($table,$database,$db);
$fields[$table] = $this->filterFieldsByColumns($fields[$table],$columns);
return $fields;
}
protected function filterFieldsByColumns($fields,$columns) {
foreach (array_keys($fields) as $key) {
if ($columns && !in_array($key, $columns)) {
unset($fields[$key]);
}
}
return $fields;
}
protected function findTableFields($table,$database,$db) {
$fields = array();
$result = $this->query($db,'SELECT * FROM "!" WHERE 1=2;',array($table));
foreach ($this->fetch_fields($result) as $field) {
$fields[$field->name] = $field;
}
return $fields;
}
protected function filterInputByColumns($input,$columns) {
foreach (array_keys((array)$input) as $key) {
if (!isset($columns[$key])) {
unset($input->$key);
}
}
return $input;
}
protected function convertBinary(&$input,$keys) {
foreach ($keys as $key=>$field) {
if (isset($input->$key) && $input->$key && $this->is_binary_type($field)) {
$data = $input->$key;
$data = str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT);
$input->$key = (object)array('type'=>'base64','data'=>$data);
}
}
}
protected function getParameters($settings) {
extract($settings);
$table = $this->parseRequestParameter($request, 'a-zA-Z0-9\-_*,', false);
$key = $this->parseRequestParameter($request, 'a-zA-Z0-9\-,', false); // auto-increment or uuid
$action = $this->mapMethodToAction($method,$key);
$callback = $this->parseGetParameter($get, 'callback', 'a-zA-Z0-9\-_', false);
$page = $this->parseGetParameter($get, 'page', '0-9,', false);
$filters = $this->parseGetParameterArray($get, 'filter', false, false);
$satisfy = $this->parseGetParameter($get, 'satisfy', 'a-z', 'all');
$columns = $this->parseGetParameter($get, 'columns', 'a-zA-Z0-9\-_,', false);
$order = $this->parseGetParameter($get, 'order', 'a-zA-Z0-9\-_*,', false);
$transform = $this->parseGetParameter($get, 'transform', '1', false);
$tables = $this->processTableParameter($database,$table,$db);
$key = $this->processKeyParameter($key,$tables,$database,$db);
foreach ($filters as &$filter) $filter = $this->processFilterParameter($filter,$db);
if ($columns) $columns = explode(',',$columns);
$page = $this->processPageParameter($page);
$order = $this->processOrderParameter($order);
if (empty($tables)) $this->exitWith404('entity');
if (in_array($action,array('update','create'))) {
// reflection
$fields = $this->findInputFields($tables[0],$columns,$database,$db);
// permissions
if ($table_authorizer) $this->applyTableAuthorizer($table_authorizer,$action,$database,$tables);
if ($column_authorizer) $this->applyColumnAuthorizer($column_authorizer,$action,$database,$fields);
// input
$context = $this->retrieveInput($post);
$input = $this->filterInputByColumns($context,$fields[$tables[0]]);
if ($input_sanitizer) $this->applyInputSanitizer($input_sanitizer,$action,$database,$tables[0],$input,$fields[$tables[0]]);
if ($input_validator) $this->applyInputValidator($input_validator,$action,$database,$tables[0],$input,$fields[$tables[0]],$context);
$this->convertBinary($input,$fields[$tables[0]]);
} else {
// reflection
list($collect,$select) = $this->findRelations($tables,$database,$db);
$fields = $this->findFields($tables,$collect,$select,$columns,$database,$db);
// permissions
if ($table_authorizer) $this->applyTableAuthorizer($table_authorizer,$action,$database,$tables);
if ($column_authorizer) $this->applyColumnAuthorizer($column_authorizer,$action,$database,$fields);
}
return compact('action','database','tables','key','callback','page','filters','satisfy','fields','order','transform','db','input','collect','select');
}
protected function listCommandInternal($parameters) {
extract($parameters);
echo '{';
$table = array_shift($tables);
// first table
$count = false;
echo '"'.$table.'":{';
if (is_array($order) && is_array($page)) {
$params = array();
$sql = 'SELECT COUNT(*) FROM "!"';
$params[] = $table;
foreach ($filters as $i=>$filter) {
if (is_array($filter)) {
$sql .= $i==0?' WHERE ':($satisfy=='all'?' AND ':' OR ');
$sql .= '"!" ! ?';
$params[] = $filter[0];
$params[] = $filter[1];
$params[] = $filter[2];
}
}
if ($result = $this->query($db,$sql,$params)) {
while ($pages = $this->fetch_row($result)) {
$count = $pages[0];
}
}
}
$params = array();
$sql = 'SELECT ';
$sql .= '"'.implode('","',array_keys($fields[$table])).'"';
$sql .= ' FROM "!"';
$params[] = $table;
foreach ($filters as $i=>$filter) {
if (is_array($filter)) {
$sql .= $i==0?' WHERE ':($satisfy=='all'?' AND ':' OR ');
$sql .= '"!" ! ?';
$params[] = $filter[0];
$params[] = $filter[1];
$params[] = $filter[2];
}
}
if (is_array($order)) {
$sql .= ' ORDER BY "!" !';
$params[] = $order[0];
$params[] = $order[1];
}
if (is_array($order) && is_array($page)) {
$sql = $this->add_limit_to_sql($sql,$page[1],$page[0]);
}
if ($result = $this->query($db,$sql,$params)) {
echo '"columns":';
$keys = array();
$base64 = array();
foreach ($fields[$table] as $field) {
$base64[] = $this->is_binary_type($field);
$keys[] = $field->name;
}
echo json_encode($keys);
$keys = array_flip($keys);
echo ',"records":[';
$first_row = true;
while ($row = $this->fetch_row($result)) {
if ($first_row) $first_row = false;
else echo ',';
if (isset($collect[$table])) {
foreach (array_keys($collect[$table]) as $field) {
$collect[$table][$field][] = $row[$keys[$field]];
}
}
foreach ($base64 as $k=>$v) {
if ($v && $row[$k]) {
$row[$k] = $this->base64_encode($row[$k]);
}
}
echo json_encode($row);
}
$this->close($result);
echo ']';
if ($count) echo ',';
}
if ($count) echo '"results":'.$count;
echo '}';
// prepare for other tables
foreach (array_keys($collect) as $t) {
if ($t!=$table && !in_array($t,$tables)) {
array_unshift($tables,$t);
}
}
// other tables
foreach ($tables as $t=>$table) {
echo ',';
echo '"'.$table.'":{';
$params = array();
$sql = 'SELECT ';
$sql .= '"'.implode('","',array_keys($fields[$table])).'"';
$sql .= ' FROM "!"';
$params[] = $table;
if (isset($select[$table])) {
$first_row = true;
echo '"relations":{';
foreach ($select[$table] as $field => $path) {
$values = $collect[$path[0]][$path[1]];
$sql .= $first_row?' WHERE ':' OR ';
$sql .= '"!" IN ?';
$params[] = $field;
$params[] = $values;
if ($first_row) $first_row = false;
else echo ',';
echo '"'.$field.'":"'.implode('.',$path).'"';
}
echo '}';
}
if ($result = $this->query($db,$sql,$params)) {
if (isset($select[$table])) echo ',';
echo '"columns":';
$keys = array();
$base64 = array();
foreach ($fields[$table] as $field) {
$base64[] = $this->is_binary_type($field);
$keys[] = $field->name;
}
echo json_encode($keys);
$keys = array_flip($keys);
echo ',"records":[';
$first_row = true;
while ($row = $this->fetch_row($result)) {
if ($first_row) $first_row = false;
else echo ',';
if (isset($collect[$table])) {
foreach (array_keys($collect[$table]) as $field) {
$collect[$table][$field][]=$row[$keys[$field]];
}
}
foreach ($base64 as $k=>$v) {
if ($v && $row[$k]) {
$row[$k] = $this->base64_encode($row[$k]);
}
}
echo json_encode($row);
}
$this->close($result);
echo ']';
}
echo '}';
}
echo '}';
}
protected function readCommand($parameters) {
extract($parameters);
$object = $this->retrieveObject($key,$fields,$tables,$db);
if (!$object) $this->exitWith404('object');
$this->startOutput($callback);
echo json_encode($object);
$this->endOutput($callback);
}
protected function createCommand($parameters) {
extract($parameters);
if (!$input) $this->exitWith404('input');
$this->startOutput($callback);
echo json_encode($this->createObject($input,$tables,$db));
$this->endOutput($callback);
}
protected function updateCommand($parameters) {
extract($parameters);
if (!$input) $this->exitWith404('subject');
$this->startOutput($callback);
echo json_encode($this->updateObject($key,$input,$tables,$db));
$this->endOutput($callback);
}
protected function deleteCommand($parameters) {
extract($parameters);
$this->startOutput($callback);
echo json_encode($this->deleteObject($key,$tables,$db));
$this->endOutput($callback);
}
protected function listCommand($parameters) {
extract($parameters);
$this->startOutput($callback);
if ($transform) {
ob_start();
}
$this->listCommandInternal($parameters);
if ($transform) {
$content = ob_get_contents();
ob_end_clean();
$data = json_decode($content,true);
echo json_encode(self::php_crud_api_transform($data));
}
$this->endOutput($callback);
}
public function __construct($config) {
extract($config);
// initialize
$hostname = isset($hostname)?$hostname:null;
$username = isset($username)?$username:null;
$password = isset($password)?$password:null;
$database = isset($database)?$database:null;
$port = isset($port)?$port:null;
$socket = isset($socket)?$socket:null;
$charset = isset($charset)?$charset:null;
$table_authorizer = isset($table_authorizer)?$table_authorizer:null;
$column_authorizer = isset($column_authorizer)?$column_authorizer:null;
$input_sanitizer = isset($input_sanitizer)?$input_sanitizer:null;
$input_validator = isset($input_validator)?$input_validator:null;
$db = isset($db)?$db:null;
$method = isset($method)?$method:null;
$request = isset($request)?$request:null;
$get = isset($get)?$get:null;
$post = isset($post)?$post:null;
// defaults
if (!$method) {
$method = $_SERVER['REQUEST_METHOD'];
}
if (!$request) {
$request = isset($_SERVER['PATH_INFO'])?$_SERVER['PATH_INFO']:'';
}
if (!$get) {
$get = $_GET;
}
if (!$post) {
$post = 'php://input';
}
if (!$charset) {
$charset = $this->getDefaultCharset();
}
// connect
$request = explode('/', trim($request,'/'));
if (!$database) {
$database = $this->parseRequestParameter($request, 'a-zA-Z0-9\-_,', false);
}
if (!$db) {
$db = $this->connectDatabase($hostname,$username,$password,$database,$port,$socket,$charset);
}
$this->settings = compact('method', 'request', 'get', 'post', 'database', 'table_authorizer', 'column_authorizer', 'input_sanitizer', 'input_validator', 'db');
}
public static function php_crud_api_transform(&$tables) {
$get_objects = function (&$tables,$table_name,$where_index=false,$match_value=false) use (&$get_objects) {
$objects = array();
foreach ($tables[$table_name]['records'] as $record) {
if ($where_index===false || $record[$where_index]==$match_value) {
$object = array();
foreach ($tables[$table_name]['columns'] as $index=>$column) {
$object[$column] = $record[$index];
foreach ($tables as $relation=>$reltable) {
if (isset($reltable['relations'])) {
foreach ($reltable['relations'] as $key=>$target) {
if ($target == "$table_name.$column") {
$column_indices = array_flip($reltable['columns']);
$object[$relation] = $get_objects($tables,$relation,$column_indices[$key],$record[$index]);
}
}
}
}
}
$objects[] = $object;
}
}
return $objects;
};
$tree = array();
foreach ($tables as $name=>$table) {
if (!isset($table['relations'])) {
$tree[$name] = $get_objects($tables,$name);
if (isset($table['results'])) {
$tree['_results'] = $table['results'];
}
}
}
return $tree;
}
public function executeCommand() {
if (isset($_SERVER['REQUEST_METHOD'])) {
header('Access-Control-Allow-Origin: *');
}
$parameters = $this->getParameters($this->settings);
switch($parameters['action']){
case 'list': $this->listCommand($parameters); break;
case 'read': $this->readCommand($parameters); break;
case 'create': $this->createCommand($parameters); break;
case 'update': $this->updateCommand($parameters); break;
case 'delete': $this->deleteCommand($parameters); break;
}
}
}
// uncomment the lines below when running in stand-alone mode:
// $api = new MySQL_CRUD_API(array(
// 'hostname'=>'localhost',
// 'username'=>'xxx',
// 'password'=>'xxx',
// 'database'=>'xxx',
// 'charset'=>'utf8'
// ));
// $api->executeCommand();
// For Microsoft SQL Server use:
// $api = new MsSQL_CRUD_API(array(
// 'hostname'=>'(local)',
// 'username'=>'',
// 'password'=>'',
// 'database'=>'xxx',
// 'charset'=>'UTF-8'
// ));
// $api->executeCommand();
// For PostgreSQL use:
// $api = new PgSQL_CRUD_API(array(
// 'hostname'=>'localhost',
// 'username'=>'xxx',
// 'password'=>'xxx',
// 'database'=>'xxx',
// 'charset'=>'UTF8'
// ));
// $api->executeCommand();
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