I've setup a physical mac computer to be a MySQL server. It works perfectly well if I access it remotely on the internet if I access it through the Terminal. Edit: I now realise this is on the local network only. So I'm now setting up a static IP and will have to post another question on that if I get stuck
But I'd love to solve why it someone doesn't work if I connect with javascript, such as in GoogleSpreadsheets or any related add-ons in GoogleSpreadsheets (which are also written on Javascript I think).
I can use any of those javascript approaches to connect to other databases which I have access to, but I'd like to find out why I can't connect to mine in particular and if there is anything I can change? Thanks.
I setup a MySQL server on computer A (Mac OS X Yosemite). I can connect fine if I use do the following in bash on computer B (Mac OS El Capitan) and then get whatever output I need from MySQL.
$ # in bash, change path to ensure SQL runs
$ export PATH=$PATH:/usr/local/mysql/bin/
$ # start sql and run a query
$ mysql -u test -pXXXXX -h 192.168.XXX.XX sakila # replace X's with real credentials, where -p is for the password and -h is for the IP address.
$ mysql> SHOW TABLES;
$ mysql> #... output is good
$ mysql> exit;
$
If I run the same credentials in Google Spreadsheets script editor, I get an error on the last line saying that either my connection string, user or password are not correct. See script below.
// attempt to access SQL data using javascript on https://script.google.com
function Drive() {
var ServerIP = '192.168.XXX.XX'; // IP address of the server. replace with real IP
var SQL_Port = '3306'; // port number
var SQL_Usr = 'test'; // name of user
var SQL_Pwd = 'xxxxx'; // password of user. replace with real password
var SQL_DB = 'sakila'; // name of sample database downloaded from MySQL Workbench documentation.
var connectorInstance = 'jdbc:mysql://' + ServerIP +':' + SQL_Port;
var ConnectString = connectorInstance + '/' + SQL_DB;
var conn = Jdbc.getConnection(ConnectString, SQL_Usr, SQL_Pwd); // error on this line
}
My javascript, my syntax is definitely correct, since if I swop in the credentials for another online database then the error disappears. Similarly, I tried 4 different Google Spreadsheets add-ons which are available when you search "SQL" in the add-on store; those work with all databases I tried but not my own.
And my own server's credentials and authorisation should be working correctly, since I can connect using bash as shown at the top.
Is there some security option setup on the other databases in the server or in their internet connection which means javascript will connect on theirs and not mine? Is there something I missed?
My alternatives would be to only access the server with bash (not good when I am building a Spreadsheet-based front-end), or to host the server online, which would involve some costs.
Would an SSH connection help at all? I haven't used one before. Any help would be appreciated.
Steps I've tried
I started off setting up MySQL Workbench with a config file as -"etc/my.cnf".
I set "skip-networking" off.
I made sure "bind_address" was off and also tried variations since as "0.0.0.0", "*" and "%".
I followed a lesson on setting up javascript code for Google scripts and granted sufficent user account details on location "%" (yes I know that's not secure but this is a small test db).
I've tried playing around with other Options File preferences under Networking or other section, but they either have no effect or the server fails to restart successfully with those applied.
Before testing my DB connection, I make sure I restart my SQL server to ensure option and user changes are applied.
I've checked StackOverflow to see who else is asking about remote databases, javascript or connection strings. No one else seems to have my exact issue.
I've tried using the host's name "Servers-Macbook-Air.local" in place of IP, again that works in bash but NOT in Javascript still. Also if I use IP or hostname for another database, that works.
I did some research after Hardy's comment - I think it is the private IP restricting me. I had only tried with both laptops in Wifi range.
http://www.gohacking.com/private-and-public-ip-addresses/
Say for example, if a network X consists of 10 computers, each of them can be given an IP starting from 192.168.1.1 to 192.168.1.10. Unlike the public IP, the administrator of the private network is free to assign an IP address of his own choice (provided the IP number falls in the private IP address range as mentioned above).
Devices with private IP addresses cannot connect directly to the Internet. Likewise, computers outside the local network cannot connect directly to a device with a private IP.
Your problem is you are trying to your local IP address of 192.168.xxx.xxx
You can not do that from the internet. As a matter of fact, that IP address only exists within your network. You and I could both have the IP of 192.168.1.10. Most off-the-shelf routers create networks that begin with 192.168.1.1 (which is probably where you can access your firewall).
The only way this could work is if you used your public IP address and you have the port you are looking for configured to point to your machine. This would typically require some Port Forwarding or Firewall configuration.
You can check your public IP with sites like http://www.ipchicken.com
Related
I have a problem in Google apps script connecting to a SQL Server database. Here is the code:
//Function to connect to ms sql server
function conn_test_server(){
var conn = Jdbc.getConnection("jdbc:sqlserver:\\ipaddress\instance:port",
"username", "password!");
}
//String formats i have used
//"jdbc:sqlserver://ipaddress:port/database"
//"jdbc:sqlserver:\\ipaddress\instance:port"
When I tried it an error is thrown that tells my to check the connection string, username and password.
I have triple checked them, as well the port seems open as I can connect through another app and also have whitelist the required IP's so the firewall does not stop them to connecting.
Please, if you could tell me other things I can look into to solve this error I would be very grateful.
I need to get the machine name and ip using php/javacript - when I run the webpage on the localhost I am getting the correct computer name and ip address but when I put the page on the webserver and run the same online - the code is returning the ip address of the client machine only NOT the name of machine-name.
I somehow need to get the client machine name and save it in the database for later operation.
So I tried in three ways:
Method 1 (php):
gethostbyaddr($_SERVER['REMOTE_ADDR']); -- return the ip
getenv('COMPUTERNAME'); -- return the ip only
Method 2(php):
echo shell_exec('echo %computername%'); -- return none instead of client computer name
Method 3 (javascript):
alert(window.location.hostname);
None of them are not working.
I'm seeking your assistance.
Thank you.
The environment on the server is clearly different to your local machine.
Try var dumping the SERVER global to see what info you do have access to:
var_dump($_SERVER);
I have created a web-based system in codeigniter and some trello integration using its API services. I wanted to achieve something like if there is a new card created in a particular board it will also send a notification in my system that a new card is created. I started reading some documentation in trello webhooks but I just can't figure it out. Am I heading in the right way? Would it be valid if I provide a callbackURL pointing in localhost callbackURL: "localhost/main_controller/trelloCallback" ? However the code below returns a 400 status. Please help me. Thank you.
Javascript
$.post("https://api.trello.com/1/tokens/5db4c9fbb5b2kaf8420771072b203616f3874fa92a4c57f0c796cf90819fa05c/webhooks?key=a2a93deccc7064dek5f4011c2e9810d6", {
description: "My first webhook",
callbackURL: "localhost/dti_infosys/main_controller/trelloCallback",
idModel: "5a73c33ad9a2dk1b473612eb",
});
main_controller/trelloCallback
function trelloCallback() {
$json = file_get_contents('php://input');
$action = json_decode($json,true);
var_dump($action);
}
I know it's an old question, but this use case of having an external tool access our localhost for development is quite common.
So for anyone (OP included) that would like a cloud based service to be able to call a local endpoint, you can use tools like ngrok.
Basically, it sets up a URL accessible via internet that forwards all calls to one of your local ports.
Let's say that your local webserver running your PHP listens on the port 8000 on your machine.
With ngrok installed, you could execute the following command:
$> ngrok http 8000
That would set up the forwarding session:
ngrok by #inconshreveable
Session Status online
Session Expires 6 hours, 21 minutes
Version 2.3.35
Region United States (us)
Web Interface http://127.0.0.1:4040
Forwarding http://b5d44737.ngrok.io -> http://localhost:8000
Forwarding https://b5d44737.ngrok.io -> http://localhost:8000
You can then use any of the Forwarding addresses pointing to ngrok.io to access your local webserver through internet, meaning that if you were to provide an URL using any of these addresses instead of localhost to an external tool, it would be able to indirectly call your local endpoint.
In your case, your javascript call to create a Trello webhook would be:
$.post("https://api.trello.com/1/tokens/<YOUR_ACCESS_TOKEN>/webhooks?key=<YOUR_API_KEY>", {
description: "My first webhook",
callbackURL: "https://b5d44737.ngrok.io/dti_infosys/main_controller/trelloCallback",
idModel: "<YOUR_MODEL_ID>",
});
A bit of warning though: In the case of ngrok, the Forwarding URLs are randomized at each session startup, meaning that the webhooks you created on one session would not work an another session because there callbacksUrl wouldn't be valid anymore.
Note that you can subscribe to a paid plan to "reserve" ngrok subdomains and have URL consistency between sessions. Or you could manually update your webhooks callbackUrls with the new forarding URLs.
Anyway, I hope this will help!
P.S.: When the forwarding session runs, you can access localhost:4040 to inspect calls made on the forwarding URLs and retry some of them.
I am attempting to follow this tutorial - https://developers.google.com/maps/articles/phpsqlajax_v3
I have a rather fundamental & simplistic question.
Using firefox, I can see this error when I load the html page with the php and javascript built in, as taken from the tutorial above.
TypeError: xml is null
The MySQL database I have is on my computer and is not hosted on the website in question. So, when I run the php script that exports the xml in the command line, I can see that it functions correctly.
I attempted to add my ip address to the phpsqlajax_dbinfo.php file, such that -
<?php
$username="";
$password="";
$database="";
$host="";
?>
But this results in a connection error.
What changes do I need to make for this to be able to reference the database on my computer, rather than one on the site?
EDIT
I have verified that the host, database, password and username fields are correct. I am able to run the phpsqlajax_genxml.php file from the command line.
If you run MySql on your computer use "localhost" as a server in phpsqlajax_dbinfo.php:
$server="localhost";
Your MySql DB is probably not set up to listen to your public IP, if you really want to use your IP you can add it to my.cnf, but I would really recommend using localhost:
bind-address = your_ip
This question already has answers here:
Can You Get A Users Local LAN IP Address Via JavaScript?
(9 answers)
Closed 3 years ago.
I want to get local IP address of a client system. How can I achieve this using JavaScript ?
I don't think you can without some server interaction.
The easiest way would be making an AJAX request to a server-side snippet that, in PHP, would look like this:
<?php echo $_SERVER["REMOTE_ADDR"]; ?>
You can't directly. One approach could be to send an AJAX request to your server (if there is one), which can return the IP address from which the user is viewing the current page.
you probably need an external party that will tell you; even if it were possible to get the local ip from javascript (which I doubt) you will most of the time get private ip address in ranges 10.x.x.x or 192.168.x.x (or that other one which I just can't seem to remember)
So put the ip in the page by php, like suggested above, of have a dedicated script echoing just the remote ip. That will then be the ip you have as seen from on the internet.
I think, you can't. But if your server has at least Server Side includes (SSI) - which every apache installation has enabled by default - you can get the ip like this:
var ip = '<!--#echo var="REMOTE_ADDR"-->';
This works on my Mac when embedded in NodeJS code, and gives the local IP address of the server running the code:
// get local IP address - Command line used is: ipconfig getifaddr en0
const { spawnSync } = require( 'child_process' );
const ip = spawnSync( 'ipconfig', [ 'getifaddr', 'en0' ] );
// the two outputs generated:
console.log( `stderr: ${ip.stderr.toString()}` );
console.log( `stdout: ${ip.stdout.toString()}` );
// applied:
console.log( 'This JavaScript is running on: ' + ip.stdout.toString() );
Note: 'en0' is the network interface in this case - you may find that your network connection is through 'en1' or 'en2' etc, so you will need to add a bit of logic to find which interface is being used.
Hope this helps
Phil