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| class: center,middle | |||
| # cURL | |||
| ### [brettlangdon](http://brett.is) | [Shapeways](https://www.shapeways.com) | |||
| http://brettlangdon.github.io/curl-talk | |||
| --- | |||
| # What is cURL? | |||
| CLI tool for getting/sending files via URL's | |||
| Supported Protocols: | |||
| .float-block[ | |||
| * DICT | |||
| * FILE | |||
| * FTP | |||
| * FTPS | |||
| * GOPHER | |||
| * **HTTP** | |||
| * **HTTPS**] | |||
| .float-block[ | |||
| * IMAP | |||
| * IMAPS | |||
| * LDAP | |||
| * LDAPS | |||
| * POP3 | |||
| * POP3S | |||
| * RTMP] | |||
| .float-block[ | |||
| * RTSP | |||
| * SCP | |||
| * SFTP | |||
| * SMTP | |||
| * SMTPS | |||
| * TELNET | |||
| * TFTP] | |||
| --- | |||
| # Quick Examples | |||
| ```bash | |||
| $ curl http://icanhazip.com | |||
| 108.46.182.85 | |||
| $ curl -i http://icanhazip.com | |||
| HTTP/1.1 200 OK | |||
| Date: Sat, 26 Apr 2014 19:49:57 GMT | |||
| Server: Apache | |||
| Content-Length: 14 | |||
| Content-Type: text/plain; charset=UTF-8 | |||
| Connection: close | |||
| 108.46.182.85 | |||
| ``` | |||
| --- | |||
| # Useful CLI Arguments | |||
| * `-v` - __Verbose:__ Make cURL more talkative | |||
| * `-h` - __Help:__ Show all CLI options | |||
| * `-F CONTENT` - __Form Data:__ Add Multipart Form data to request | |||
| * `-H HEADER` - __Header:__ Add HEADER to request header | |||
| * `-X COMMAND` - __Method:__ Set request method (GET/POST/etc) | |||
| * `-o FILE` - __Output:__ Output to FILE rather than stdout | |||
| * `-L` - __Follow Redirects:__ Follow all redirects | |||
| * `-i` - __Response Headers:__ Show the requests response headers | |||
| --- | |||
| # Download a File | |||
| ### Download to stdout | |||
| ```bash | |||
| $ curl http://www.google.com | |||
| <!doctype html><html itemscope="" | |||
| itemtype="http://schema.org/WebPage" | |||
| lang="en"><head> | |||
| ... | |||
| ``` | |||
| ### Save to a File "google-home.html" | |||
| ```bash | |||
| $ curl -o google-home.html http://www.google.com | |||
| ``` | |||
| --- | |||
| # Response Headers Only | |||
| * `-I` - Show response headers _ONLY_ | |||
| ```bash | |||
| $ curl -I http://www.google.com | |||
| HTTP/1.1 200 OK | |||
| Date: Sat, 26 Apr 2014 20:40:04 GMT | |||
| Expires: -1 | |||
| Cache-Control: private, max-age=0 | |||
| Content-Type: text/html; charset=ISO-8859-1 | |||
| Set-Cookie: PREF=ID=61629e9495553921:FF=0:TM=1398544804... | |||
| Set-Cookie: NID=67=HHSAgTCIZ3zd6w2hjrNqoX1VX9NDaqscV9Yc... | |||
| P3P: CP="This is not a P3P policy! See ..." | |||
| Server: gws | |||
| X-XSS-Protection: 1; mode=block | |||
| X-Frame-Options: SAMEORIGIN | |||
| Alternate-Protocol: 80:quic | |||
| Transfer-Encoding: chunked | |||
| ``` | |||
| --- | |||
| # Save/Reuse Cookies | |||
| * `-c FILE` - Save cookies to _FILE_ | |||
| * `-b FILE` - Load cookies from _FILE_ | |||
| ```bash | |||
| $ curl -c cookies -b cookies http://www.google.com | |||
| $ cat cookies | |||
| # Netscape HTTP Cookie File | |||
| # http://curl.haxx.se/docs/http-cookies.html | |||
| # This file was generated by libcurl! Edit at your own risk. | |||
| ID=bec963a425f5d8ca:FF=0:TM=1398545024:LM=1398545024:S=... | |||
| 67=BV0jhMokci-G3ZbOJ2UeFaNX1faFdfbFVcPHYIpAh35Uz2th6lVq... | |||
| ``` | |||
| --- | |||
| # Following Redirects | |||
| * `-I` - Response headers only | |||
| * `-L` - Follow redirects | |||
| ```bash | |||
| $ curl -I -L http://google.com | |||
| HTTP/1.1 301 Moved Permanently | |||
| Location: http://www.google.com/ | |||
| ... | |||
| Expires: Sat, 31 May 2014 12:50:05 GMT | |||
| Cache-Control: public, max-age=2592000 | |||
| HTTP/1.1 200 OK | |||
| Date: Thu, 01 May 2014 12:50:05 GMT | |||
| Expires: -1 | |||
| Cache-Control: private, max-age=0 | |||
| Content-Type: text/html; charset=ISO-8859-1 | |||
| ... | |||
| ``` | |||
| --- | |||
| # HTTP POST Data | |||
| * `-X METHOD` - Set HTTP Request Method | |||
| * `-d DATA` - Send request form data | |||
| ```bash | |||
| $ curl -X POST -d "name=brett&talk=curl" http://httpbin.org/post | |||
| { | |||
| "form": { | |||
| "name": "brett", | |||
| "talk": "curl" | |||
| }, | |||
| "headers": { | |||
| "Host": "httpbin.org", | |||
| "Content-Type": "application/x-www-form-urlencoded", | |||
| ... | |||
| }, | |||
| ... | |||
| } | |||
| ``` | |||
| --- | |||
| # HTTP POST File | |||
| * `-d @FILE` - Send _FILE_ with the request | |||
| * `-X METHOD` - Set HTTP request method | |||
| * `-H HEADER` - Add _HEADER_ to request headers | |||
| ```bash | |||
| $ cat data.json | |||
| {"name": "brett","talk": "curl"} | |||
| $ curl -X POST -d @data.json \ | |||
| -H "Content-Type: application/json" http://httpbin.org/post | |||
| { | |||
| "data": "{\"name\": \"brett\",\"talk\": \"curl\"}", | |||
| "json": { | |||
| "talk": "curl", | |||
| "name": "brett" | |||
| }, | |||
| "headers": { | |||
| "Content-Type": "application/json", | |||
| ... | |||
| } | |||
| ``` | |||
| --- | |||
| # HTTPS | |||
| ```bash | |||
| $ curl https://www.google.com | |||
| <!doctype html><html itemscope="" | |||
| itemtype="http://schema.org/WebPage" | |||
| lang="en"><head> | |||
| ... | |||
| ``` | |||
| #### Allow Insecure Certs | |||
| * `-k` - Allow Insecure Certs | |||
| ```bash | |||
| $ curl -k https://insecure-site.gov | |||
| ``` | |||
| --- | |||
| # Learning More | |||
| * cURL Website | |||
| * http://curl.haxx.se/ | |||
| * This talk | |||
| * http://brettlangdon.github.io/curl-talk | |||
| * httpbin (test http request/response) | |||
| * http://httpbin.org/ | |||
| ```bash | |||
| $ man curl | |||
| $ curl --help | |||
| ``` | |||