307 lines
9.1 KiB
HTML
307 lines
9.1 KiB
HTML
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<title>curl Cheatsheet - Cheatsheets - Launch Pad</title>
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<div class="name">
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__ _______________________ _________._________________________
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\_ _____/ \______ \ / _ \ / _____/ / _____/ | | \_ _____/
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| __) | _/ / /_\ \ / \ ___ / \ ___ | | | __)_
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| \ | | \ / | \ \ \_\ \ \ \_\ \ | |___ | \
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\___ / |____|_ / \____|__ / \______ / \______ / |_______ \ /_______ /
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\/ \/ \/ \/ \/ \/ \/
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</div>
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<div class="blog-page-header">
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<div class="blog-header-content">
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<a href="/cheatsheets" class="back-link" title="Back to Cheatsheets">
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<svg xmlns="http://www.w3.org/2000/svg" width="42" height="42" viewBox="0 0 24 24" class="home-icon"><path fill="currentColor" d="M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8z"/></svg>
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</a>
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<h1 class="blog-page-title">curl Cheatsheet</h1>
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</div>
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</div>
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<div class="blog-post-container">
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<div class="blog-posts-container" style="max-width: 900px; margin: 0 auto;">
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<div class="blog-post">
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<div class="blog-post-content">
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<p><a href="index.html">← Back to cheatsheets</a></p>
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<p><a href="../index.html">← Home</a></p>
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<hr>
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<p>curl is a command-line tool for transferring data with URLs. It supports HTTP, HTTPS, FTP, and many other protocols. Essential for API testing, web scraping, and general HTTP operations.</p>
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<hr>
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<h2>Basic Usage</h2>
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<ul>
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<li>curl <url> - GET request, output to stdout</li>
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</ul>
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<ul>
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<li>curl -o file.html <url> - Save to file</li>
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</ul>
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<ul>
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<li>curl -O <url> - Save with remote filename</li>
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</ul>
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<hr>
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<h2>HTTP Methods</h2>
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<ul>
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<li>curl -X GET <url> - GET request (default)</li>
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</ul>
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<ul>
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<li>curl -X POST <url> - POST request</li>
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</ul>
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<ul>
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<li>curl -X PUT <url> - PUT request</li>
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</ul>
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<ul>
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<li>curl -X DELETE <url> - DELETE request</li>
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</ul>
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<ul>
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<li>curl -X PATCH <url> - PATCH request</li>
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</ul>
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<ul>
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<li>curl -I <url> - HEAD request (headers only)</li>
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</ul>
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<hr>
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<h2>Headers</h2>
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<ul>
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<li>-H "Header: Value" - Add custom header</li>
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</ul>
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<ul>
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<li>-H "Content-Type: application/json" - Set content type</li>
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</ul>
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<ul>
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<li>-H "Authorization: Bearer token" - Auth header</li>
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</ul>
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<ul>
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<li>-A "User-Agent" - Set User-Agent</li>
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</ul>
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<ul>
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<li>-e "Referer" - Set Referer header</li>
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</ul>
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<hr>
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<h2>Data/Body</h2>
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<ul>
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<li>-d "data" - Send POST data</li>
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</ul>
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<ul>
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<li>-d @file.json - POST data from file</li>
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</ul>
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<ul>
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<li>--data-urlencode "param=value" - URL encode data</li>
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</ul>
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<ul>
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<li>-F "file=@path/file.txt" - Form upload</li>
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</ul>
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<ul>
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<li>-F "field=value" - Form field</li>
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</ul>
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<hr>
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<h2>Output Options</h2>
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<ul>
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<li>-o filename - Output to file</li>
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</ul>
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<ul>
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<li>-O - Save with remote filename</li>
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</ul>
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<ul>
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<li>-s - Silent mode (no progress)</li>
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</ul>
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<ul>
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<li>-S - Show errors in silent mode</li>
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</ul>
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<ul>
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<li>-v - Verbose output</li>
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</ul>
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<ul>
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<li>-i - Include response headers</li>
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</ul>
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<ul>
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<li>-w "%{http_code}" - Write out format</li>
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</ul>
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<hr>
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<h2>Authentication</h2>
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<ul>
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<li>-u user:password - Basic auth</li>
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</ul>
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<ul>
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<li>--digest - Digest auth</li>
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</ul>
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<ul>
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<li>--ntlm - NTLM auth</li>
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</ul>
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<ul>
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<li>--negotiate - Negotiate auth</li>
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</ul>
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<ul>
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<li>-E cert.pem - Client certificate</li>
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</ul>
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<hr>
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<h2>Cookies</h2>
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<ul>
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<li>-b "name=value" - Send cookie</li>
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</ul>
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<ul>
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<li>-b cookies.txt - Read cookies from file</li>
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</ul>
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<ul>
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<li>-c cookies.txt - Save cookies to file</li>
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</ul>
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<ul>
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<li>-c - - Print cookies to stdout</li>
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</ul>
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<hr>
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<h2>SSL/TLS</h2>
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<ul>
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<li>-k - Ignore SSL errors</li>
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</ul>
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<ul>
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<li>--cacert file - CA certificate</li>
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</ul>
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<ul>
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<li>--cert file - Client certificate</li>
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</ul>
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<ul>
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<li>--key file - Private key</li>
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</ul>
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<ul>
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<li>--tlsv1.2 - Force TLS 1.2</li>
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</ul>
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<ul>
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<li>--tlsv1.3 - Force TLS 1.3</li>
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</ul>
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<hr>
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<h2>Proxy</h2>
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<ul>
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<li>-x proxy:port - HTTP proxy</li>
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</ul>
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<ul>
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<li>-x socks5://proxy:port - SOCKS5 proxy</li>
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</ul>
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<ul>
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<li>--proxy-user user:pass - Proxy auth</li>
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</ul>
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<ul>
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<li>--noproxy "localhost" - Bypass proxy</li>
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</ul>
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<hr>
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<h2>Redirects & Timeouts</h2>
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<ul>
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<li>-L - Follow redirects</li>
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</ul>
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<ul>
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<li>--max-redirs N - Max redirects</li>
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</ul>
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<ul>
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<li>--connect-timeout N - Connection timeout</li>
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</ul>
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<ul>
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<li>-m N - Max time for operation</li>
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</ul>
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<ul>
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<li>--retry N - Retry count</li>
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</ul>
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<hr>
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<h2>Common Examples</h2>
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<h3>Simple GET</h3>
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<pre><code>curl https://api.example.com/data</code></pre>
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<p>Basic GET request.</p>
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<h3>POST JSON</h3>
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<pre><code>curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' https://api.example.com/data</code></pre>
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<p>POST JSON data.</p>
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<h3>Download File</h3>
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<pre><code>curl -O https://example.com/file.zip</code></pre>
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<p>Download and save with original name.</p>
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<h3>With Auth</h3>
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<pre><code>curl -u admin:password https://api.example.com/admin</code></pre>
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<p>Basic authentication.</p>
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<h3>Headers Only</h3>
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<pre><code>curl -I https://example.com</code></pre>
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<p>Get response headers only.</p>
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<h3>Verbose Debug</h3>
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<pre><code>curl -v https://example.com</code></pre>
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<p>See full request/response details.</p>
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<h3>Follow Redirects</h3>
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<pre><code>curl -L https://example.com/redirect</code></pre>
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<p>Follow HTTP redirects.</p>
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<h3>Upload File</h3>
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<pre><code>curl -F "file=@/path/to/file.txt" https://example.com/upload</code></pre>
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<p>Upload file via form.</p>
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<h3>Status Code Only</h3>
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<pre><code>curl -s -o /dev/null -w "%{http_code}" https://example.com</code></pre>
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<p>Get only HTTP status code.</p>
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<h3>Through Proxy</h3>
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<pre><code>curl -x http://proxy:8080 https://example.com</code></pre>
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<p>Route through HTTP proxy.</p>
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<h3>Save Cookies</h3>
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<pre><code>curl -c cookies.txt -b cookies.txt https://example.com/login</code></pre>
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<p>Manage session cookies.</p>
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<h3>API Token</h3>
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<pre><code>curl -H "Authorization: Bearer eyJhbGc..." https://api.example.com/user</code></pre>
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<p>Request with bearer token.</p>
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<hr>
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<h2>Write-Out Variables</h2>
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<p>Use with -w option:</p>
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<ul>
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<li>%{http_code} - HTTP status code</li>
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<li>%{time_total} - Total time</li>
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<li>%{time_connect} - Time to connect</li>
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<li>%{size_download} - Downloaded bytes</li>
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<li>%{speed_download} - Download speed</li>
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<li>%{url_effective} - Final URL</li>
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<li>%{redirect_url} - Redirect URL</li>
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</ul>
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<hr>
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<h2>Tips</h2>
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<ul>
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<li>Use -s for scripts (silent mode)</li>
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</ul>
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<ul>
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<li>Use -v to debug connection issues</li>
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</ul>
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<ul>
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<li>Use -L to handle redirects automatically</li>
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</ul>
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<ul>
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<li>Use -k only for testing (insecure)</li>
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</ul>
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<ul>
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<li>Combine -sS for silent but show errors</li>
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</ul>
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<ul>
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<li>Use @filename to read data from files</li>
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</ul>
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<ul>
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<li>Essential for API testing and debugging</li>
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</ul>
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<ul>
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<li>Supports many protocols beyond HTTP</li>
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</ul>
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<hr>
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<p><a href="index.html">← Back to cheatsheets</a></p>
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<p><a href="../index.html">← Home</a></p>
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</div>
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