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cURL is a common line tool that will allow us to transfer data to a server using a specific protocol.
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In our case, we'll use it to send HTTP request.
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For that we can use the MobaXTerm terminal, but we can use any other Linux terminal with cURL
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installed.
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In MobaXTerm, click on start a local terminal.
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We are now able to type most of the useful Linux command.
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And if for other purposes than this course you can't find the command you need, then please go on the
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package manager and check if it's available for this terminal.
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By default, cURL sends to a server an HTTP GET request and print out the answer.
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We can cURL Google for example.
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We receive the content of the HTML front page.
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I've got another server ready to receive HTTP request.
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So let's try.
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On the left.
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I've got my MobaXTerm terminal.
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It's from where I'm going to send HTTP request.
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On the right.
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I've got an HTTP server.
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It will just print out the request it received, but it won't send any answer back to the client.
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The command is easy.
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It's curl, then I just need to specify the method I want to use with the -- request option.
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In this
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example, I will use an HTTP GET request.
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If the type of request is not mentioned and the default one is GET.
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But I want to write it down so we don't get confused.
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Then I enter the server URL.
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In my case, the server on the right has this address.
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Finally, if you're getting annoyed with certificates, you can use the -- insecure option.
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I launched a command, my server receives it, and it updates its log.
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Really easy.
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I can try another kind of request, which is the POST request.
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So if I change, GET by POST, I've got the same kind of result, but this time with the POST method.
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And finally, I can send some data in the request.
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Let's say hello.
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For that, I need to use the -- option with the content of my message.
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And here we go, in the body section.
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I've got my message. Later in this
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course, when we'll have to send some request to a LoRaWAN server,
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then we'll use these tools.