Troubleshooting of curl errors - Revision history

Planetoid: /* How to Suppress the Progress Meter */

2026-04-02T02:48:29Z

How to Suppress the Progress Meter

← Older revision		Revision as of 10:48, 2 April 2026
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	To suppress the progress meter of the curl command, you can use the {{kbd \| key=<nowiki>-s</nowiki>}} (silent) option, which hides all output, or the {{kbd \| key=<nowiki>-S</nowiki>}} (silent with error messages) option, which suppresses the progress meter but still displays error messages.		To suppress the progress meter of the curl command, you can use the {{kbd \| key=<nowiki>-s</nowiki>}} (silent) option, which hides all output, or the {{kbd \| key=<nowiki>-S</nowiki>}} (silent with error messages) option, which suppresses the progress meter but still displays error messages.
	<pre>		<pre>
	curl -sS [URL]		curl -sSo file.pdf [URL]
	</pre>		</pre>

	Alternatively, if you prefer to suppress all output including error messages, use the {{kbd \| key=<nowiki>-s</nowiki>}} (silent) option alone:		Alternatively, if you prefer to suppress all output including error messages, use the {{kbd \| key=<nowiki>-s</nowiki>}} (silent) option alone:
	<pre>		<pre>
	curl -s [URL]		curl -so file.pdf [URL]
	</pre>		</pre>

	Suggestion:		Suggestion:
	<pre>		<pre>
	curl -~~sSf~~ [URL]		curl -sSfo file.pdf [URL]
	</pre>		</pre>
	Adding {{kbd \| key=<nowiki>-f</nowiki>}} causes curl to fail on HTTP errors (4xx, 5xx), making it the most robust option for scripts.		Adding {{kbd \| key=<nowiki>-f</nowiki>}} causes curl to fail on HTTP errors (4xx, 5xx), making it the most robust option for scripts.

2026-04-02T02:44:27Z

How to Suppress the Progress Meter

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 When executing the curl command, the typical output includes detailed information about the download and upload process as shown below:
 <pre>
   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
@@ Line 414: / Line 416: @@
 </pre>
 === How to resolve cURL Illegal Filename Character Error ===

2026-02-04T07:38:39Z

How to resolve 400 Bad Request Errors: UTF-8 Character Encoding Issues

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 Proposed Solution
 * Instead of relying on the cURL command, switching to a JavaScript-based crawler is recommended as a solution to this problem <ref>[https://www.zenrows.com/blog/cloudflare-error-1010#how-to-avoid Cloudflare Error 1010: What Is It and How to Avoid - ZenRows]</ref>.
 === How to resolve 400 Bad Request Errors:  UTF-8 Character Encoding Issues ===

2025-08-20T08:28:57Z

How to trace cUrl error (6) Could not resolve host

← Older revision		Revision as of 16:28, 20 August 2025
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	If you're unsure whether encoding is needed, you can use an online URL encoder tool for conversion e.g. [https://www.urlencoder.org/ URL Encode and Decode - Online].		If you're unsure whether encoding is needed, you can use an online URL encoder tool for conversion e.g. [https://www.urlencoder.org/ URL Encode and Decode - Online].


			=== How to trace cUrl error (6) Could not resolve host ===

			This DNS resolution error indicates the hostname doesn't exist. Here are the 3 key debugging steps:

			1. Verify the main domain exists
			<pre>
			curl -i https://example.com
			</pre>

			2. Check subdomain DNS resolution
			<pre>
			nslookup subdomain.example.com
			</pre>

			3. Test correct URL structure
			<pre>
			# Maybe it's a path instead of subdomain
			curl -i "https://www.example.com/subdomain/..."

			# Or try common subdomain alternatives
			nslookup www.example.com
			nslookup api.example.com
			</pre>

			Conclusion: If you get {{kbd \| key=NXDOMAIN}}, the subdomain doesn't exist - verify the correct URL from your source.

	=== How to resolve cUrl error (#5): Unsupported proxy syntax ===		=== How to resolve cUrl error (#5): Unsupported proxy syntax ===

2025-06-21T07:50:49Z

How to resolve the error: zsh: parse error near `&'

← Older revision		Revision as of 15:50, 21 June 2025
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	* When you encounter an error while downloading a file with `curl`, it may be because the URL does not include a file name, causing `curl` to be unable to determine the name to save the file under. The solution is to manually specify a file name using the `-o` option, for example, `curl -o myfile.html "https://website.com/?p=123"`. Additionally, make sure you have enough disk space and are in a directory where you have write permissions.		* When you encounter an error while downloading a file with `curl`, it may be because the URL does not include a file name, causing `curl` to be unable to determine the name to save the file under. The solution is to manually specify a file name using the `-o` option, for example, `curl -o myfile.html "https://website.com/?p=123"`. Additionally, make sure you have enough disk space and are in a directory where you have write permissions.

	=== How to resolve ~~the error:~~ zsh: parse error near `&' ===		=== How to resolve zsh parse error near `&' ===
	Error condition		Error condition
	<pre>		<pre>
Line 273:		Line 273:
	dquote>		dquote>
	</pre>		</pre>



	=== How to resolve zsh Event Not Found Error ===		=== How to resolve zsh Event Not Found Error ===

2025-06-21T07:49:59Z

How to resolve the error: zsh: parse error near `&'

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 dquote>
 </pre>
 === How to Suppress the Progress Meter ===

2025-06-21T07:43:36Z

← Older revision		Revision as of 15:43, 21 June 2025
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	PHP code:		PHP code:
	<pre>		<pre>
	$is_windows = strtoupper(substr(PHP_OS, 0, 3)) ===== 'WIN';		$is_windows = strtoupper(substr(PHP_OS, 0, 3)) === 'WIN';
	if ($is_windows) {		if ($is_windows) {
	$command = sprintf('-d "{\"key\":\"%s\"}"', $value);		$command = sprintf('-d "{\"key\":\"%s\"}"', $value);

2025-06-21T07:40:11Z

2025-06-21T07:25:30Z

2025-06-18T11:11:22Z

How to Suppress the Progress Meter

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 curl -s [URL]
 </pre>
 == cURL JSON Payload Issues in Windows vs Mac/Linux Systems ==

← Older revision		Revision as of 15:25, 21 June 2025
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	* Mac/Linux: Can use single quotes to wrap the complete JSON string		* Mac/Linux: Can use single quotes to wrap the complete JSON string
	* When using incorrect quote formatting, the JSON payload is parsed incorrectly, causing the API to return a format error message		* When using incorrect quote formatting, the JSON payload is parsed incorrectly, causing the API to return a format error message

			== Related security issue ==
			* [https://owasp.org/www-community/attacks/Command_Injection Command Injection] "an attack technique in which an attacker exploits vulnerabilities in an application to inject and execute malicious operating system commands, typically through unvalidated user input such as forms, cookies, or HTTP headers."

	== Further reading ==		== Further reading ==