Troubleshooting of curl errors: Difference between revisions
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[https://curl.haxx.se/ cUrl] "is used in command lines or scripts to transfer data."[https://curl.haxx.se/] (alternative library to achive sampe purpose: (1) PHP naive [https://www.php.net/manual/en/book.curl.php Client URL Library] (2) [https://packagist.org/packages/curl/curl cURL class for PHP] (3) [https://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/objectstorage/installing_cURL/installing_cURL_on_Cygwin_on_Windows.html Installing cURL on Cygwin on Windows]) | [https://curl.haxx.se/ cUrl] "is used in command lines or scripts to transfer data."[https://curl.haxx.se/] (alternative library to achive sampe purpose: (1) PHP naive [https://www.php.net/manual/en/book.curl.php Client URL Library] (2) [https://packagist.org/packages/curl/curl cURL class for PHP] (3) [https://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/objectstorage/installing_cURL/installing_cURL_on_Cygwin_on_Windows.html Installing cURL on Cygwin on Windows]) | ||
: [[Image:Owl icon.jpg]] How to debut the cUrl command: (1) Enable the [https://ec.haxx.se/usingcurl/verbose verbose] option e.g. "... run the command with the {{kbd | key=<nowiki>-v</nowiki>}} / {{kbd | key=<nowiki>--verbose</nowiki>}} option to get more information." | : [[Image:Owl icon.jpg]] How to debut the cUrl command: (1) Enable the [https://ec.haxx.se/usingcurl/verbose verbose] option e.g. "... run the command with the {{kbd | key=<nowiki>-v</nowiki>}} / {{kbd | key=<nowiki>--verbose</nowiki>}} option to get more information." or (2) Enable the [https://ec.haxx.se/usingcurl/verbose/trace trace options] e.g. {{kbd | key=<nowiki>--trace-ascii [filename]</nowiki>}} | ||
== How to resolve cUrl error (#5): Unsupported proxy syntax == | == How to resolve cUrl error (#5): Unsupported proxy syntax == |
Revision as of 12:26, 20 January 2021
cUrl "is used in command lines or scripts to transfer data."[1] (alternative library to achive sampe purpose: (1) PHP naive Client URL Library (2) cURL class for PHP (3) Installing cURL on Cygwin on Windows)
- How to debut the cUrl command: (1) Enable the verbose option e.g. "... run the command with the -v / --verbose option to get more information." or (2) Enable the trace options e.g. --trace-ascii [filename]
How to resolve cUrl error (#5): Unsupported proxy syntax
Condition: the username of socks5 proxy contains @ symbol such as [email protected]
curl_setopt($ch, CURLOPT_PROXY, 'socks5://username:password@localhost:12345'); // result is ok curl_setopt($ch, CURLOPT_PROXY, 'socks5://[email protected]:password@localhost:12345'); // met cUrl error (#5): Unsupported proxy syntax
Solution: Escape the special symbol[1] using URL Encode and Decode - Online or urlencode function
curl_setopt($ch, CURLOPT_PROXY, 'socks5://bob%40email.com:password@localhost:12345'); // result is ok
How to resolve cUrl error (#56): OpenSSL SSL_read: No error.
Condition: The curl vesion 7.67.0 on windows met problem. Result of curl_version returned:
version: Array ( [version_number] => 475904 [age] => 5 [features] => 2953117 [ssl_version_number] => 0 [version] => 7.67.0 [host] => x86_64-pc-win32 [ssl_version] => OpenSSL/1.1.1d [libz_version] => 1.2.11 )
Solution: Use other version of curl command or curl on Cygwin or cURL class for PHP.
Related articles
How to resolve Error 405 Method Not Allowed
When I tried to crawl the web resource but met the error message: "Error 405 Method Not Allowed"
Solution: Make sure using the correct HTTP request method[2] e.g. GET or POST to access the web resource.
How to resolve Error 415 Unsupported Media Type
When I tried to POST JSON (as payload) but met the error message: "Error 415 Unsupported Media Type"
Solution: Set the cUrl with the header Content-Type: application/json[3] Example syntax of cUrl command as following:
curl -X POST --header "Content-Type: application/json" --data '{"user" : "your_user_name", "token" : "your_token"}' "https://example.com/"
How to rseolve cURL returns binary data instead of html or json
How to resolve the downloaded file was empty
Error condition
- When I executed the Curl command curl -O https://path/to/plain_text.txt, but the downloaded file was empty.
Solution
- After I enabled verbose option, I found the HTTP status code HTTP/1.1 302 Moved Temporarily. I added the location (-L) parameter to resolve the downloaded file was empty: curl -L -O https://path/to/plain_text.txt,
The truncated result after executed the command: curl -v -O https://path/to/plain_text.txt < HTTP/1.1 302 Moved Temporarily < Server: nginx < Date: Tue, 25 Aug 2020 03:45:13 GMT < Content-Type: text/html < Transfer-Encoding: chunked < Connection: keep-alive < Keep-Alive: timeout=60 < Location: /path/to/plain_text.txt
How to resolve the error: no matches found
Error condition
- When I executed the Curl command curl http://website.test/http_status.php?case=500, but I met the error message: "zsh: no matches found: http://website.test/http_status.php?case=500"
Solution
- Double quote the URL e.g. curl "http://website.test/http_status.php?case=500"
Further reading
References
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