Ideally, the system account would only have access to the particular batch jobs that it executes.Īn alternative method to executing batch jobs on the PHP platform is to directly call the PHP executable from the command line, instead of going through the web server. This technique enables a secure method for batch processing in web applications, and helps reduce application vulnerability to hacking. Wget -qO-load-cookies cookies.txt &> /dev/null This command should only be run once, and should not be stored inside any script to prevent hard storage of the password.įinally, the authentication token in cookies.txt can be used to run the script in the batch job: The resulting cookies will be saved to the file cookies.txt in the current folder. Wget -qO-keep-session-cookies -save-cookies cookies.txt -post-data 'user=MYUSER&password=MYPASS' ĭepending on the login form arguments, different post-data will need to be entered. In order to generate the cookie, the login script should first be run by passing the login parameters through the POST data, and then saving the resulting cookie to disk: The job should ideally run through a token-based cookie, isolated to the local machine. It’s insecure to pass login parameters directly through the URL due to server logging. This script can be then put inside a cron job and executed on a target interval as needed by the application.Ī problem arises, however, when the script is secured, as it should be so that non-administrative users will not have access to run system batch jobs. In order to access that webpage, the server can use Wget and discard the output by piping it to /dev/null: In order to run the job, the server simply needs to access the webpage at a predefined interval.
WGET ALTERNATIVE CODE
In order to leverage the already-built code of the web application, many backend jobs are often programmed as scripts on the website. In addition to downloading programs, however, Wget can be used to remotely trigger events or run jobs in web applications. Normally, downloading a file from the Internet using Wget is done as follows:
WGET ALTERNATIVE INSTALL
Wget is used constantly throughout the installation process to download files from the Internet and install new programs on the system. SSH normally offers only a command line interface without any graphical components, so all the server maintenance needs to be done through the command line. While this capability might initially seem only moderately useful (Why not just use Chrome or Firefox to download the file?) – most Linux servers are managed remotely through a tool called SSH.
With a simply one-line command, the tool can download files from the web and save them to the local disk. One of the powerful tools available in most Linux distributions is the Wget command line utility.
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