Are you tired of encountering the notorious cURL error 35 when making API calls to your S3-compatible storage? You’re not alone! This frustrating issue has been the bane of many developers’ existence, but fear not, dear reader, for we’re about to embark on a thrilling adventure to vanquish this error once and for all.
What is cURL error 35, anyway?
cURL error 35 is a generic error code returned by the cURL library when it encounters an unspecified error. Yeah, that’s right – it’s as helpful as a fortune cookie message that says “Error: unknown.” But don’t worry, we’ll dive deeper into the possible causes and solutions.
Possible Causes of cURL error 35
Before we start troubleshooting, let’s explore some common culprits behind this error:
- Network issues: Packet loss, latency, or DNS resolution problems can cause cURL to throw its hands up in despair.
- TLS/SSL certificate woes: Certificate validation failures, expired certificates, or misconfigured certificates can trigger this error.
- S3-compatible API misconfiguration: Incorrect bucket names, invalid credentials, or mismatched endpoint URLs can lead to this error.
- cURL version or configuration: Outdated cURL versions or incorrect configuration settings can cause this error.
- Server-side issues: Temporary server outages, maintenance, or software updates can cause this error.
Troubleshooting Steps
Now that we’ve identified the potential causes, let’s walk through a step-by-step troubleshooting process to resolve cURL error 35:
Step 1: Verify Network Connectivity
Check your network connection by:
- Pinging the S3-compatible API endpoint URL to ensure it’s reachable.
- Verifying that your machine’s network settings are correct and functioning properly.
- Checking for any firewall rules blocking the connection.
Step 2: Inspect TLS/SSL Certificates
Verify the TLS/SSL certificate configuration by:
- Checking the certificate expiration date to ensure it’s valid.
- Verifying the certificate chain is correctly configured.
- Using tools like OpenSSL to verify the certificate:
openssl s_client -connect :443 -servername Step 3: Review S3-Compatible API Configuration
Double-check your S3-compatible API configuration by:
- Verifying the bucket name, access key, and secret key are correct.
- Ensuring the endpoint URL is correct and points to the right region.
- Checking the API documentation for any specific configuration requirements.
Step 4: Update cURL Version and Configuration
Ensure you’re running the latest cURL version and verify your configuration by:
- Checking the cURL version:
curl --version- Verifying the cURL configuration file (usually located at `/etc/curl.conf` or `~/.curlrc`) is correct.
Step 5: Contact Server Administrators (if necessary)
If none of the above steps resolve the issue, it’s possible that the error is server-side. Reach out to the S3-compatible API administrators to:
- Check for any scheduled maintenance or software updates.
- Verify that the API is functioning correctly and not experiencing any issues.
Example Code Snippets
To help illustrate the troubleshooting process, let’s take a look at some example code snippets in different programming languages:
PHP Example
<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://s3-compatible-api.example.com/bucket/object');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Authorization: Bearer YOUR_ACCESS_KEY',
'Content-Type: application/json'
));
$response = curl_exec($ch);
curl_close($ch);
?>Python Example (using requests library)
import requests
response = requests.get('https://s3-compatible-api.example.com/bucket/object',
headers={
'Authorization': 'Bearer YOUR_ACCESS_KEY',
'Content-Type': 'application/json'
})
print(response.text)cURL Command-Line Example
curl -X GET \
https://s3-compatible-api.example.com/bucket/object \
-H 'Authorization: Bearer YOUR_ACCESS_KEY' \
-H 'Content-Type: application/json'Conclusion
cURL error 35 can be a frustrating obstacle, but by following this comprehensive guide, you should be able to identify and resolve the underlying issue. Remember to methodically troubleshoot each potential cause, and don’t hesitate to reach out to server administrators if necessary. Happy debugging!
| Troubleshooting Step | Possible Causes | Solution |
|---|---|---|
| Verify Network Connectivity | Network issues | Check network connection, ping API endpoint, and verify firewall rules |
| Inspect TLS/SSL Certificates | TLS/SSL certificate issues | Verify certificate expiration, chain, and configuration |
| Review S3-Compatible API Configuration | S3-compatible API misconfiguration | Verify bucket name, access key, secret key, and endpoint URL |
| Update cURL Version and Configuration | cURL version or configuration issues | Check cURL version, verify configuration file, and update if necessary |
| Contact Server Administrators | Server-side issues | Reach out to server administrators for assistance |
Frequently Asked Question
Are you tired of encountering the frustrating “Random cURL error 35” when calling an S3-compatible API? Worry no more! We’ve got you covered with these top 5 FAQs to help you troubleshoot and resolve this pesky error.
What is cURL error 35, and why does it occur?
cURL error 35 occurs when there’s an SSL/TLS handshake failure, often due to issues with the SSL/TLS certificate, firewall restrictions, or problems with the server’s SSL/TLS configuration. This error can be particularly frustrating because it’s intermittent, making it harder to track down.
How can I verify the SSL/TLS certificate of the S3-compatible API?
You can use tools like OpenSSL or online certificate checkers to verify the SSL/TLS certificate of the S3-compatible API. Make sure the certificate is valid, trusted, and matches the expected domain or hostname. You can also check the certificate chain to ensure it’s properly configured.
Are there any firewall or network issues that could cause cURL error 35?
Yes, firewall restrictions or network issues can definitely cause cURL error 35. Check your firewall rules to ensure they’re not blocking the connection to the S3-compatible API. Also, verify that your network configuration allows for outgoing connections to the API’s hostname or IP address. You may need to configure your firewall or proxy settings to resolve this issue.
Can I disable SSL verification to bypass cURL error 35?
While it’s possible to disable SSL verification, we strongly advise against it, as it compromises the security of your requests. Instead, focus on resolving the underlying SSL/TLS issues or configuring your environment to trust the API’s certificate. Disabling SSL verification can expose your application to man-in-the-middle attacks and other security risks.
What are some additional troubleshooting steps I can take to resolve cURL error 35?
Additional troubleshooting steps include checking the API’s server status, verifying the API endpoint and credentials, and reviewing your application’s error logs for more detailed information. You can also try using a different SSL/TLS version or cipher suite to see if that resolves the issue. If you’re still stuck, consider reaching out to the API provider’s support team for further assistance.
