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curl defaults to displaying the output it retrieves to the standard output specified on the system (usually the terminal window). So running the command above, on most systems, displays the HTML contents of www.example.com in plain text on the active terminal window. The -o flag can be used to store the output in a file instead:
Curl also permits top-level file inclusion so that a source text in markup can be included in different parent files. In education, for example, one could create a source file of test questions, and include it in both a student and a teacher version of the text.
jq is typically used at the command line and can be used with other command-line utilities, such as curl.Here is an example showing how the output of a curl command can be piped to a jq filter to determine the category names associated with this Wikipedia page:
Many command line programs, such as cURL [1] or Bash [2],can be set to verbose mode by using a flag, such as -v or --verbose. References
Services are executed in the same manner, except they don't terminate like regular programs do. Once the service is up and running, one can use an HTTP client to invoke the service. For example, the above service can be invoked using the following cURL command: $
POST is therefore suitable for requests which change the state each time they are performed, for example submitting a comment to a blog post or voting in an online poll. GET is defined to be nullipotent , with no side-effects, and idempotent operations have "no side effects on second or future requests".
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curl-loader is capable of simulating application behavior of hundreds of thousands of HTTP/HTTPS and FTP/FTPS clients, each with its own source IP-address. In contrast to other tools, curl-loader is using real C-written client protocol stacks, namely, HTTP and FTP stacks of libcurl and TLS/SSL of openSSL, and simulates user behavior with support for login and authentication flavors.