How can I check whether database host is valid?
try {
Yii::app()->db;
} catch (Exception $ex) {
echo $ex->getMessage();
}
Code above gives me this error when I use invalid host address:
PDO::__construct(): php_network_getaddresses: getaddrinfo failed: No such host is known.
I just want to receive something that returns false, so I could display my own error message
Related
When running php artisan migrate, It gives following error message:
Illuminate\Database\QueryException
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo for http failed: No such host is known. (SQL: select * from information_schema.tables where table_schema = my_art_stock and table_name = migrations and table_type = 'BASE TABLE')
at C:\Users\installerjoe\laravel-projects\myArtStock-project\vendor\laravel\framework\src\Illuminate\Database\Connection.php:712
708▕ // If an exception occurs when attempting to run a query, we'll format the error
709▕ // message to include the bindings with SQL, which will make this exception a
710▕ // lot more helpful to the developer instead of just the database's errors.
711▕ catch (Exception $e) {
➜ 712▕ throw new QueryException(
713▕ $query, $this->prepareBindings($bindings), $e
714▕ );
715▕ }
716▕ }
1 C:\Users\installerjoe\laravel-projects\myArtStock-project\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
PDOException::("PDO::__construct(): php_network_getaddresses: getaddrinfo for http failed: No such host is known. ")
2 C:\Users\installerjoe\laravel-projects\myArtStock-project\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
PDO::__construct("mysql:host=http://art-stock-db.cujslgoio4sv.us-east-2.rds.amazonaws.com/;port=3306;dbname=my_art_stock", "stockadmin", "indianopen11*", [])
Please what causes this error, server configurations or laravel configuration? I'd really appreciate if someone offers a solution to this error.
I am uploading a file to Alibaba Cloud - OSS bucket. Have correct access key and secret key.
Using oss-sdk-php through yii2, Getting Error
{"name":"PHP Fatal Error","message":"Uncaught exception
'OSS\Core\OssException' with message 'RequestCoreException: cURL
resource: Resource id #351; cURL error: Failed to connect to
chinaproduct.oss-cn-beijing.aliyuncs.com port 80: Connection timed out
(7)'
Unable to get exact issue, any help would be appreciated.
// #### Delete old files / Fetch all files with prefix
$listObjectInfo = $ossClient->listObjects($productBucket,array('prefix'=>$uploadProductPrefix));
$objectList = $listObjectInfo->getObjectList();
foreach ($objectList as $objectInfo) {
$fileNameToDelete = $objectInfo->getKey();
$ossClient->deleteObject($productBucket,$fileNameToDelete);
\Yii::info("OSS : Deleted file from OSS -$productBucket - $fileNameToDelete");
}
} catch (OssException $e) {
\Yii::info("OSS : Unable to delete old files from OSS $productBucket for dataId $dataId " . $e);
}
I have no trouble connecting to the live database locally using port forwarding, but when we go to connect from the openshift gear, we get errors. Let me begin with the code:
Here is the connection variable
var connectionpool = mysql.createPool({
host : process.env.OPENSHIFT_MYSQL_DB_HOST,
port : process.env.OPENSHIFT_MYSQL_DB_PORT,
user : process.env.OPENSHIFT_MYSQL_DB_USERNAME,
password : process.env.OPENSHIFT_MYSQL_DB_PASSWORD,
database : 'stembuds',
socket : process.env.OPENSHIFT_MYSQL_DB_SOCKET
});
Here is an example of a query:
app.get('/answerDB/:course?/:answerID?', function(req, res){
var course = req.param('course');
var answerID = req.param('answerID');
connectionpool.getConnection(function(err, connection){
if(err){
console.error('CONNECTION error: ',err);
res.statusCode = 503;
res.send({
result: 'error',
err: err.code
});
}
if (course === undefined && answerID === undefined) {
connection.query('SELECT * FROM questions WHERE counter = 0', function(err, rows, fields){
if (err) {
console.error(err);
res.statusCode = 500;
res.send({
result: 'error',
err: err.code
});
}
for(var i in rows){
var newCourse = rows[i].course;
newCourse = courses[newCourse];
rows[i].course = newCourse;
}
res.send(rows);
connection.release();
});
}
Here are some errors we receive.
First is an error in the console of Chrome:
GET http://**.rhcloud.com/answerDB 503 (Service Temporarily Unavailable)
But sometimes we get a proxy error:
GET http://**.rhcloud.com/exploreDB 502 (Proxy Error)
Additionally, I have been running the command rhc tail -a nodejs and here is the error I am receiving
CONNECTION error: { [Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'adminMYXaSuf'#'127.11.28.130' (using password: YES)]
code: 'ER_ACCESS_DENIED_ERROR',
errno: 1045,
sqlState: '28000',
fatal: true }
TypeError: Cannot call method 'query' of undefined
at /var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/routes/site.js:172:15
at Pool.<anonymous> (/var/lib/openshift/5303aee55973ca4092000084/app- root/runtime/repo/node_modules/mysql/lib/Pool.js:49:16)
at Handshake.Sequence.end (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/protocol/sequences/Sequence.js:78:24)
at Handshake.ErrorPacket (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/protocol/sequences/Handshake.js:93:8)
at Protocol._parsePacket (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/protocol/Protocol.js:202:24)
at Parser.write (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/protocol/Parser.js:62:12)
at Protocol.write (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/protocol/Protocol.js:37:16)
at Socket.<anonymous> (/var/lib/openshift/5303aee55973ca4092000084/app-root/runtime/repo/node_modules/mysql/lib/Connection.js:72:28)
at Socket.EventEmitter.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:720:14)
Now it says cannot call method query of undefined. We thought that was strange, so we changed 'connection.query' to 'connectionpool.query' and it then told us that it cannot call method release of undefined. So we changed 'connection.release()' to 'connectionpool.release()' and it told us that the object # has no method release. So I am taking that part of the error with a grain of salt.
We have no idea why it wont connect. Any information would be greatly appreciated - Thanks.
If your application code works locally while connecting to your remote OpenShift-hosted DB (using rhc port-forward), then I would suspect that your app may have some undocumented dependencies.
It could be that you've installed something locally (or globally) in your dev environment, without including that dep in your app's package.json file.
Make sure that everything your app needs in order to run in a fresh environment is included in your app's package.json file before pushing it to OpenShift.
npm install my_dependency --save
I've written up some additional notes that might be useful for testing locally with a port-forwarded connection to an OpenShift-hosted DB: https://www.openshift.com/blogs/set-up-local-access-to-openshift-hosted-services-with-port-forwarding
Did you create that database name? It should be the name of your application. You can use the OPENSHIFT_APP_NAME environment variable for your database name. Can you ssh into your gear and connect to mysql without any issues? Also, are you trying to connect to the database on your openshift gear from your local machine or from your openshift gear?
I am using phpMailer for sending bulk email, Some of emails are bouncing, How I get Hard Bounced email ids.
I am new in PHP, I found in some websites i will get responses like
500 - The server could not recognize the command due to a syntax error.
501 - A syntax error was encountered in command arguments.
502 - This command is not implemented.
503 - The server has encountered a bad sequence of commands.
504 - A command parameter is not implemented.
550 - The requested command failed because the user's mailbox was unavailable (for example because it was not found, or because the command was rejected for policy reasons).
551 - The recipient is not local to the server. The server then gives a forward address to try.
552 - The action was aborted due to exceeded storage allocation.
553 - The command was aborted because the mailbox name is invalid.
554 - The transaction failed. Blame it on the weather.
but I didnt fount any where how I get this response?
When you run "Send()" method you may check "ErrorInfo" property:
$mail = new PHPMailer();
...
if(!$mail->Send())
{
echo "Message could not be sent.";
echo "Mailer Error: " . $mail->ErrorInfo;
exit;
}
echo "Message has been sent";
or
$mail = new PHPMailer(true); // the true param means it will throw exceptions on errors, which we need to catch
...
try
{
...
$mail->Send();
}
catch (phpmailerException $e)
{
echo $e->errorMessage(); // Error messages from PHPMailer
}
catch (Exception $e)
{
echo $e->getMessage(); // Something else
}
My C client program connects with MySQL server. I can connect, but the problem arises when I try to implement error detection codes. If I do the following (here I have intentionally put incorrect user name):
#include "mysql.h"
int main()
{
MYSQL* conn_ptr_db;
conn_ptr_db = mysql_init(NULL);
if(!conn_ptr_db)
{
perror("Error connecting to MySQL! ");
exit(0);
}
if(mysql_real_connect(conn_ptr_db,"localhost","rooti","root","mysql",0,NULL,0))
{
printf("Hurrah! we have connected to MySQL! ");
mysql_close(conn_ptr_db);
}
else
{
printf("Connection failed to MySQL! \n");
printf("Error code: %d %s %s\n",mysql_errno(conn_ptr_db),mysql_sqlstate(conn_ptr_db),mysql_error(conn_ptr_db));
}
//mysql_close(conn_ptr_db);
return 0;
}
Now the output to this program:
./db_access
Connection failed to MySQL!
Error code: 1045 28000 Access denied for user 'rooti'#'localhost' (using password: YES)
This is the correct output.
But if I do the following:
#include "mysql.h"
int main()
{
MYSQL* conn_ptr_db;
conn_ptr_db = mysql_init(NULL);
if(!conn_ptr_db)
{
perror("Error connecting to MySQL! ");
exit(0);
}
//CHANGES -------------
conn_ptr_db = mysql_real_connect(conn_ptr_db,"localhost","rooti","root","mysql",0,NULL,0);
if(conn_ptr_db)
{
printf("Hurrah! we have connected to MySQL! ");
mysql_close(conn_ptr_db);
}
else
{
printf("Connection failed to MySQL! \n");
printf("Error code: %d %s %s\n",mysql_errno(conn_ptr_db),mysql_sqlstate(conn_ptr_db),mysql_error(conn_ptr_db));
}
//mysql_close(conn_ptr_db);
return 0;
}
I get the following output:
./db_access
Connection failed to MySQL!
Error code: 0 08001
Here, the mysql_errno() and mysql_error() are not working. Why?
After the connection has failed conn_ptr_db is set to NULL. You then try and use this value as a paramter to a call to msql_errono(), in effect msql_errno(NULL). Hence the error code your getting.
Because in the second example you assign the result to conn_ptr_db.
You should not have done so.
From the documentation:
A MYSQL* connection handle if the
connection was successful, NULL if the
connection was unsuccessful. For a
successful connection, the return
value is the same as the value of the
first parameter.
In the case of an unsuccessful connection (which you have), you've replaced your conn_ptr_db object with NULL then attempt to do stuff with it (mysql_error).
The documentation for mysql_error doesn't explicitly say that a NULL parameter is disallowed, but it's clear that you won't get the error relating to the original, actual connection context that you overwrote.