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Curl Tutorial

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Ankireddy Polu
Ankireddy Polu

Curl Introduction and Commands useful most of the API invocations. Invoke-RestMethod commands to invoke the APIs produced with Basic Authentication.

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CURL Ankireddy Polu
cURL ( Client URL) ◦ command line tool and library for transferring data with URLs ◦ DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, Telnet and TFTP. ◦ curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, HTTP/2, HTTP/3, cookies, user+password authentication (Basic, Plain, Digest, CRAM-MD5, NTLM, Negotiate and Kerberos), file transfer resume, proxy tunneling and more.
Limitations to invoke URLs? ◦ Customers won’t allow install any additional software on their servers including the browser plugins. ◦ Restricted access to ports ◦ Instruct the server admins using tools which they are familiar.
Install cURL https://bintray.com/artifact/download/vs zakats/generic/curl-7.73.0-win32- mingw.zip brew install curl Linux MacOS Windows For Ubuntu sudo apt update sudo apt install curl For centos/RHEL sudo yum install curl choco install curl
Invoke-RestMethod ◦ GET ◦ GET with custom headers example ◦ PUT/POST ◦ DELETE ◦ Basic Authentication ◦ API key ◦ File Upload (InFile) ◦ Params ◦ ConvertFrom-JSON, ConvertTo-JSON
Curl ◦ GET ◦ GET with custom headers example ◦ PUT/POST ◦ DELETE ◦ Basic Authentication ◦ API key ◦ File Upload ( -F ) ◦ Insecure (-k, --insure) ◦ Config ◦ verbose
Replicating browser requests with cURL ◦ Copy as PowerShell◦ Copy as cURL
Commands CURL curl -X GET "https://httpbin.org/image" -H "accept:image/webp" --output c:softwareswebp.webp curl -X GET "https://httpbin.org/image/png" -H "accept:image/png" --output c:softwarespng.png curl -s -w "%{http_code}" -X GET "https://httpbin.org/image" -H "accept:image/webp" --output c:softwareswebp.webp curl -I -X GET "https://httpbin.org/basic-auth/system/manager" -H "accept: application/json" curl -u system:manager -X GET "https://httpbin.org/basic-auth/system/manager" -H "accept: application/json" curl https://brianiswu-cat-facts-v1.p.rapidapi.com/facts -w "%{http_code}" curl -H "x-rapidapi-key:1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597" https://brianiswu-cat-facts-v1.p.rapidapi.com/facts curl -H "x-rapidapi-key:1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597" https://brianiswu-cat-facts-v1.p.rapidapi.com/facts --output c:softwaresoutput.json curl -v -insecure https://expired.badssl.com/
Commands CURL + Elasticsearch curl -X POST http://localhost:9200/default_umc/_doc -H "content-type:application/json" --data '{"user":"anki","country":"india","city":"chennai"}' curl -X POST http://localhost:9200/default_umc/_search -H "content-type:application/json" --data '{"query":{"term":{"user":"anki"}}}' curl -X DELETE http://localhost:9200/default_umc/
Commands Invoke-RestMethod invoke-restmethod -method GET -Uri https://httpbin.org/image -outfile c:softwareswebp.webp invoke-restmethod -method GET -Uri https://httpbin.org/image -header @{"accept"="image/webp"} -outfile c:softwareswebp.webp $header = @{"accept"="image/webp"} invoke-restmethod -method GET -Uri https://httpbin.org/image -header $header - outfile c:softwareswebp.webp $credentials = Get-Credential Invoke-restmethod -cred $credentials -Method GET -Uri https://httpbin.org/basic- auth/system/manager -outfile c:softwaresout.json invoke-restmethod -Method GET -uri https://brianiswu-cat-facts- v1.p.rapidapi.com/facts -Header @{"x-rapidapi- key"="1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597"}
Resources ◦ https://httpbin.org/ ◦ https://expired.badssl.com/ ◦ https://rapidapi.com/brianiswu/api/cat-facts ◦ https://curlbuilder.com/

More Related Content

Curl Tutorial

  • 2. cURL ( Client URL) ◦ command line tool and library for transferring data with URLs ◦ DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, Telnet and TFTP. ◦ curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, HTTP/2, HTTP/3, cookies, user+password authentication (Basic, Plain, Digest, CRAM-MD5, NTLM, Negotiate and Kerberos), file transfer resume, proxy tunneling and more.
  • 3. Limitations to invoke URLs? ◦ Customers won’t allow install any additional software on their servers including the browser plugins. ◦ Restricted access to ports ◦ Instruct the server admins using tools which they are familiar.
  • 4. Install cURL https://bintray.com/artifact/download/vs zakats/generic/curl-7.73.0-win32- mingw.zip brew install curl Linux MacOS Windows For Ubuntu sudo apt update sudo apt install curl For centos/RHEL sudo yum install curl choco install curl
  • 5. Invoke-RestMethod ◦ GET ◦ GET with custom headers example ◦ PUT/POST ◦ DELETE ◦ Basic Authentication ◦ API key ◦ File Upload (InFile) ◦ Params ◦ ConvertFrom-JSON, ConvertTo-JSON
  • 6. Curl ◦ GET ◦ GET with custom headers example ◦ PUT/POST ◦ DELETE ◦ Basic Authentication ◦ API key ◦ File Upload ( -F ) ◦ Insecure (-k, --insure) ◦ Config ◦ verbose
  • 7. Replicating browser requests with cURL ◦ Copy as PowerShell◦ Copy as cURL
  • 8. Commands CURL curl -X GET "https://httpbin.org/image" -H "accept:image/webp" --output c:softwareswebp.webp curl -X GET "https://httpbin.org/image/png" -H "accept:image/png" --output c:softwarespng.png curl -s -w "%{http_code}" -X GET "https://httpbin.org/image" -H "accept:image/webp" --output c:softwareswebp.webp curl -I -X GET "https://httpbin.org/basic-auth/system/manager" -H "accept: application/json" curl -u system:manager -X GET "https://httpbin.org/basic-auth/system/manager" -H "accept: application/json" curl https://brianiswu-cat-facts-v1.p.rapidapi.com/facts -w "%{http_code}" curl -H "x-rapidapi-key:1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597" https://brianiswu-cat-facts-v1.p.rapidapi.com/facts curl -H "x-rapidapi-key:1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597" https://brianiswu-cat-facts-v1.p.rapidapi.com/facts --output c:softwaresoutput.json curl -v -insecure https://expired.badssl.com/
  • 9. Commands CURL + Elasticsearch curl -X POST http://localhost:9200/default_umc/_doc -H "content-type:application/json" --data '{"user":"anki","country":"india","city":"chennai"}' curl -X POST http://localhost:9200/default_umc/_search -H "content-type:application/json" --data '{"query":{"term":{"user":"anki"}}}' curl -X DELETE http://localhost:9200/default_umc/
  • 10. Commands Invoke-RestMethod invoke-restmethod -method GET -Uri https://httpbin.org/image -outfile c:softwareswebp.webp invoke-restmethod -method GET -Uri https://httpbin.org/image -header @{"accept"="image/webp"} -outfile c:softwareswebp.webp $header = @{"accept"="image/webp"} invoke-restmethod -method GET -Uri https://httpbin.org/image -header $header - outfile c:softwareswebp.webp $credentials = Get-Credential Invoke-restmethod -cred $credentials -Method GET -Uri https://httpbin.org/basic- auth/system/manager -outfile c:softwaresout.json invoke-restmethod -Method GET -uri https://brianiswu-cat-facts- v1.p.rapidapi.com/facts -Header @{"x-rapidapi- key"="1475db38bamsh43c4c98a9ca0578p115c39jsn333977ab7597"}
  • 11. Resources ◦ https://httpbin.org/ ◦ https://expired.badssl.com/ ◦ https://rapidapi.com/brianiswu/api/cat-facts ◦ https://curlbuilder.com/

Editor's Notes

  1. $headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]" $headers.Add("X-DATE", '9/29/2014’) $headers.Add("X-SIGNATURE", '234j123l4kl23j41l23k4j’) $headers.Add("X-API-KEY", 'testuser')