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urlhash first steps, including scripts/upgrade.php

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This commit is contained in:
Mikael Nordfeldth 2015-02-17 18:55:12 +01:00
parent 59763ceecb
commit 5a8f24eb46
2 changed files with 59 additions and 10 deletions
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34
classes/File.php
View File

@ -26,7 +26,8 @@ class File extends Managed_DataObject
{
public $__table = 'file'; // table name
public $id; // int(4) primary_key not_null
public $url; // varchar(255) unique_key
public $urlhash; // varchar(64) unique_key
public $url; // text
public $mimetype; // varchar(50)
public $size; // int(4)
public $title; // varchar(255)
@ -37,12 +38,15 @@ class File extends Managed_DataObject
public $height; // int(4)
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
const URLHASH_ALG = 'sha256';
public static function schemaDef()
{
return array(
'fields' => array(
'id' => array('type' => 'serial', 'not null' => true),
'url' => array('type' => 'varchar', 'length' => 255, 'description' => 'destination URL after following redirections'),
'urlhash' => array('type' => 'varchar', 'length' => 64, 'description' => 'sha256 of destination URL (url field)'),
'url' => array('type' => 'text', 'description' => 'destination URL after following redirections'),
'mimetype' => array('type' => 'varchar', 'length' => 50, 'description' => 'mime type of resource'),
'size' => array('type' => 'int', 'description' => 'size of resource when available'),
'title' => array('type' => 'varchar', 'length' => 255, 'description' => 'title of resource when available'),
@ -56,7 +60,7 @@ class File extends Managed_DataObject
),
'primary key' => array('id'),
'unique keys' => array(
'file_url_key' => array('url'),
'file_urlhash_key' => array('urlhash'),
),
);
}
@ -77,10 +81,11 @@ class File extends Managed_DataObject
// I don't know why we have to keep doing this but I'm adding this last check to avoid
// uniqueness bugs.
$file = File::getKV('url', $given_url);
$file = File::getKV('urlhash', self::hashurl($given_url));
if (!$file instanceof File) {
$file = new File;
$file->urlhash = self::hashurl($given_url);
$file->url = $given_url;
if (!empty($redir_data['protected'])) $file->protected = $redir_data['protected'];
if (!empty($redir_data['title'])) $file->title = $redir_data['title'];
@ -462,7 +467,7 @@ class File extends Managed_DataObject
if (!empty($this->filename)) {
// A locally stored file, so let's generate a URL for our instance.
$url = self::url($this->filename);
if ($url != $this->url) {
if (self::urlhash($url) !== $this->urlhash) {
// For indexing purposes, in case we do a lookup on the 'url' field.
// also we're fixing possible changes from http to https, or paths
$this->updateUrl($url);
@ -476,14 +481,15 @@ class File extends Managed_DataObject
public function updateUrl($url)
{
$file = File::getKV('url', $url);
$file = File::getKV('urlhash', self::hashurl($url));
if ($file instanceof File) {
throw new ServerException('URL already exists in DB');
}
$sql = 'UPDATE %1$s SET url=%2$s WHERE url=%3$s;';
$sql = 'UPDATE %1$s SET urlhash=%2$s, url=%3$s WHERE urlhash=%4$s;';
$result = $this->query(sprintf($sql, $this->__table,
$this->_quote((string)self::hashurl($url)),
$this->_quote((string)$url),
$this->_quote((string)$this->url)));
$this->_quote((string)$this->urlhash)));
if ($result === false) {
common_log_db_error($this, 'UPDATE', __FILE__);
throw new ServerException("Could not UPDATE {$this->__table}.url");
@ -502,9 +508,9 @@ class File extends Managed_DataObject
function blowCache($last=false)
{
self::blow('file:notice-ids:%s', $this->url);
self::blow('file:notice-ids:%s', $this->urlhash);
if ($last) {
self::blow('file:notice-ids:%s;last', $this->url);
self::blow('file:notice-ids:%s;last', $this->urlhash);
}
self::blow('file:notice-count:%d', $this->id);
}
@ -582,4 +588,12 @@ class File extends Managed_DataObject
return $title ?: null;
}
static public function hashurl($url)
{
if (empty($url)) {
throw new Exception('No URL provided to hash algorithm.');
}
return hash(self::URLHASH_ALG, $url);
}
}

35
scripts/upgrade.php
View File

@ -76,6 +76,7 @@ function updateSchemaCore()
$schema = Schema::get();
$schemaUpdater = new SchemaUpdater($schema);
foreach (tableDefs() as $table => $def) {
preAlterFixes($schemaUpdater, $table);
$schemaUpdater->register($table, $def);
}
$schemaUpdater->checkSchema();
@ -83,6 +84,40 @@ function updateSchemaCore()
printfnq("DONE.\n");
}
function preAlterFixes($schemaUpdater, $table)
{
switch ($table) {
case 'file':
$schemadef = $schemaUpdater->schema->getTableDef($table);
if (isset($schemadef['fields']['urlhash'])) {
// We already have the urlhash field, so no need to migrate it.
break;
}
printfnq("\nFound old $table table, upgrading it to contain 'urlhash' field...\n");
// We have to create a urlhash that is _not_ the primary key,
// transfer data and THEN run checkSchema
$schemadef['fields']['urlhash'] = array (
'type' => 'varchar',
'length' => 64,
'description' => 'sha256 of destination URL after following redirections',
);
$schemaUpdater->schema->ensureTable($table, $schemadef);
printfnq("DONE.\n");
$filefix = new File();
// urlhash is hash('sha256', $url) in the File table
printfnq("Updating urlhash fields in $table table...\n");
$filefix->query(sprintf('UPDATE %1$s SET %2$s=%3$s;',
$schemaUpdater->schema->quoteIdentifier($table),
'urlhash',
// The line below is "result of sha256 on column `url`"
'SHA2(url, 256)'));
printfnq("DONE.\n");
printfnq("Resuming core schema upgrade...");
break;
}
}
function updateSchemaPlugins()
{
printfnq("Upgrading plugin schema...");