curl-command tagged requests and articles
Categorized request examples and articles tagged with [curl-command] keyword List of popular Curl flags with short descriptions
Curl supports over 380 command-line flags that can be used to customize every aspect of Curl. Curl is designed to work without user interaction, supports many popular Internet protocols, and runs on most modern operating systems. Curl's possibilities are endless, and it is easy to get lost in many flags. This article provides a list of the most commonly used Curl flags with short descriptions that you can use in your projects.
Top 12 Curl Commands
Curl is a popular command-line utility for transferring data to or from a server using over 25+ protocols. The Curl command-line tool provides several advanced options such as user authentication, proxy support, resuming transmission, limiting bandwidth and transfer rates, and more. Curl commands work without user interaction and are therefore ideal for use in automation scenarios. This article will go over the 12 most essential Curl commands for day-to-day use for making requests over HTTP/HTTPS protocols.
How do I use curl -u option?
The curl -u (or --- user) command sends the user's basic authentication data to the server. The user's credentials must be provided directly after the -u command line switch. The curl -u command is used to authorize a user using the HTTP basic authentication scheme that is built into the HTTP protocol. Curl converts the provided user authentication data into a standard Authorization: Basic {base64string} HTTP header and sends it to the server along with the other data in your request. In this Curl -u example, we send a request with user credentials to the ReqBin echo URL. Click Run to execute the Curl Basic Authentication example online and see the results.
The most popular Curl examples
This article provides 12 practical examples of using the Curl command-line tool, with a brief description of each Curl example. Curl examples include sending a JSON file to a server, submitting a web form, user authentication, proxy support, saving the server response to disk, and more. Most of the examples given can be done right in the browser using the ReqBin Online Curl Client.
How do I use curl -d option?
The curl -d (or --data) command line argument tells Curl to send the passed data to the server in the body of the HTTP message. When you pass data to Curl with the -d command line argument, Curl, by default, sends the data to the server in the Content-Type: application/x-www-form-urlencoded format. To send data in a different format, you must specify the correct content type with the -H command line argument. The Content-Type request header is required for servers to correctly interpret and process the data in the POST message body. In this Curl -d example, we send the data to the ReqBin echo URL. Click Run to execute the Curl -d request online and see the results.
How do I use curl -k option?
The curl -k (or --insecure) command line option ignores invalid and self-signed certificate errors. This setting allows Curl to make an "insecure" SSL connection and skip SSL certificate checks while you still have an SSL-encrypted connection. This may be useful for development purposes. Making an HTTPS request to a resource with an invalid or expired SSL certificate without the -k or --insecure option will result in curl: "(60) SSL certificate: invalid certificate chain: error message". In this Curl -k example, we request a URL with an expired SSL certificate and still get a response. Click Run to execute the Curl -k example online and see the result.
How do I use curl -v option?
The curl -v command performs an HTTP request and displays detailed information (verbose mode) about each step of the request and server response. This command is useful for debugging network problems, monitoring and analyzing the interaction between client and server when making HTTP requests. In this Curl -v example, we request the ReqBin echo URL. Click Run to execute the Verbose Mode online and see the result.
Using Curl -H Option
An example of making a Curl request to the https://reqbin.com/echo/post/json API endpoint using the POST HTTP method.
Curl supports over 380 command-line flags that can be used to customize every aspect of Curl. Curl is designed to work without user interaction, supports many popular Internet protocols, and runs on most modern operating systems. Curl's possibilities are endless, and it is easy to get lost in many flags. This article provides a list of the most commonly used Curl flags with short descriptions that you can use in your projects.
Top 12 Curl Commands
Curl is a popular command-line utility for transferring data to or from a server using over 25+ protocols. The Curl command-line tool provides several advanced options such as user authentication, proxy support, resuming transmission, limiting bandwidth and transfer rates, and more. Curl commands work without user interaction and are therefore ideal for use in automation scenarios. This article will go over the 12 most essential Curl commands for day-to-day use for making requests over HTTP/HTTPS protocols.
How do I use curl -u option?
The curl -u (or --- user) command sends the user's basic authentication data to the server. The user's credentials must be provided directly after the -u command line switch. The curl -u command is used to authorize a user using the HTTP basic authentication scheme that is built into the HTTP protocol. Curl converts the provided user authentication data into a standard Authorization: Basic {base64string} HTTP header and sends it to the server along with the other data in your request. In this Curl -u example, we send a request with user credentials to the ReqBin echo URL. Click Run to execute the Curl Basic Authentication example online and see the results.
The most popular Curl examples
This article provides 12 practical examples of using the Curl command-line tool, with a brief description of each Curl example. Curl examples include sending a JSON file to a server, submitting a web form, user authentication, proxy support, saving the server response to disk, and more. Most of the examples given can be done right in the browser using the ReqBin Online Curl Client.
How do I use curl -d option?
The curl -d (or --data) command line argument tells Curl to send the passed data to the server in the body of the HTTP message. When you pass data to Curl with the -d command line argument, Curl, by default, sends the data to the server in the Content-Type: application/x-www-form-urlencoded format. To send data in a different format, you must specify the correct content type with the -H command line argument. The Content-Type request header is required for servers to correctly interpret and process the data in the POST message body. In this Curl -d example, we send the data to the ReqBin echo URL. Click Run to execute the Curl -d request online and see the results.
How do I use curl -k option?
The curl -k (or --insecure) command line option ignores invalid and self-signed certificate errors. This setting allows Curl to make an "insecure" SSL connection and skip SSL certificate checks while you still have an SSL-encrypted connection. This may be useful for development purposes. Making an HTTPS request to a resource with an invalid or expired SSL certificate without the -k or --insecure option will result in curl: "(60) SSL certificate: invalid certificate chain: error message". In this Curl -k example, we request a URL with an expired SSL certificate and still get a response. Click Run to execute the Curl -k example online and see the result.
How do I use curl -v option?
The curl -v command performs an HTTP request and displays detailed information (verbose mode) about each step of the request and server response. This command is useful for debugging network problems, monitoring and analyzing the interaction between client and server when making HTTP requests. In this Curl -v example, we request the ReqBin echo URL. Click Run to execute the Verbose Mode online and see the result.
Using Curl -H Option
An example of making a Curl request to the https://reqbin.com/echo/post/json API endpoint using the POST HTTP method.
How to Install Curl?
A quick guide to installing the Curl command-line tool on Linux, Windows, and macOS platforms.
A quick guide to installing the Curl command-line tool on Linux, Windows, and macOS platforms.
