Articles about curl | UserComp.com

Make cURL establish TLS connection with CA unknown

Resolve cURL TLS connection failures with unknown or self-signed certificates by using the --insecure flag to bypass CA validation.

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Troubleshooting curl not working on an RHEL8 Server

Resolve curl failures on RHEL8 caused by missing packages, firewall blocks, or SSL errors.

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Retrieving JSON with Curl in PHP

Resolve PHP cURL JSON retrieval errors by ensuring proper configuration, error handling, and decoding.

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Troubleshooting DNS Wildcard Domains: github.com Case Study

Resolve unexpected wildcard DNS results for github.com by fixing local cache poisoning and correcting BIND9 forwarder configuration.

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Troubleshooting Airflow Statsd Exporter Not Responding Issue

Resolve Airflow Statsd Exporter not responding by verifying container health, Docker network port mappings, and environment variable configuration.

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Using curl wttr.in to Display Only Current Temperature Value

Extract the current temperature integer from wttr.in using curl, grep, and sed for clean scripting output.

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Executing a Script Once with curl on Windows Startup

Configure a Windows scheduled task to run a curl script once at startup using a marker file check for idempotency.

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Understanding Window Specific URL Curl Output with Bash

Capture the final URL after redirects in Bash scripts using curl -w "%{url_effective}\n" to resolve discrepancies between requested and actual endpoints.

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Setting up Windows Task Scheduler to Send Mail via SMTP using cURL

Automate email notifications via SMTP using cURL in Windows Task Scheduler without external mail clients.

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Why is cURL returning just two square brackets with this request?

Resolve cURL returning empty JSON arrays by verifying request syntax, headers, and authentication permissions.

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Unblock Websites with CURL through Reverse SSH Tunnel Proxy

Route cURL requests through a home IP via reverse SSH tunnel to bypass geo-blocks and avoid data center IP flags during web scraping.

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How to Save curl.exe Output Response Content_Type to a Separate File

Save curl HTTP response headers to a file using the -D flag while discarding the body with -o NUL or /dev/null.

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Reproducing CURL with curl -- resolve: browser?

Resolve how to map a hostname to a specific IP in a browser using the hosts file or local proxies to replicate curl --resolve behavior.

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Curl Error (6): Couldn't Resolve Hostname

Fixes curl error 6 in WSL 1 by resolving DNS failures caused by empty or incorrect resolv.conf configuration.

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Running Multiple curl cmd Commands Found in a Separate .txt File in a Single Folder

Execute multiple curl commands stored in a text file by parsing lines with a shell while loop and eval to handle complex arguments.

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How to Use cURL to Try Nameservers in resolv.conf?

Test specific nameservers from resolv.conf by extracting IPs and using cURL --resolve to isolate DNS resolution and compare response times.

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How to Set the Return Code from CURL as a Variable

Capture the HTTP status code from a curl command into a shell variable using the -w flag to distinguish server responses from network errors.

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Access Denied While Trying to Download PDF with CURL

Resolve cURL access denied errors by adding browser-like HTTP headers to bypass server bot protection.

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Understanding curl: Way to write current time and output info

Resolve latency and obscuration in chunked HTTP responses by disabling buffering and decoding while adding per-line timestamps for real-time debugging.

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Understanding Curl Interface with SO_BINDTODEVICE Tunnel Interfaces

Resolve curl traffic misrouting on tunnel interfaces by binding requests to specific virtual devices using interface flags or SO_BINDTODEVICE.

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How to Configure cURL for Authenticated SMTP Connection with Self-Signed CA Certificate

Resolve cURL SSL verification errors when connecting to SMTP servers using self-signed CA certificates by specifying the certificate file with the --cacert flag.

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Microsoft's Compiler Not Reading libcurl.dll: A Solution for C Programmers

Resolve Microsoft C compiler runtime errors by placing libcurl.dll in the system PATH or application directory.

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Curl command freezes and does not work as expected

Resolve curl command freezes by setting timeouts with --max-time, verifying DNS in /etc/resolv.conf, and checking firewall or proxy configurations.

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Download from github using curl and batch file

Automate GitHub file downloads on Windows using curl and batch files to ensure consistent, error-checked retrieval without manual intervention.

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Ubuntu 23.10 on DigitalOcean VPS: Unable to use curl

Resolve curl failures on Ubuntu 23.10 DigitalOcean VPS by verifying network connectivity, installing dependencies, and checking firewall restrictions.

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Wget Error: Certificate <domain> Signed Using Insecure Algorithm - Wget vs Curl

Resolve Wget errors caused by certificates signed with insecure algorithms like SHA-1 by updating the server certificate or using specific flags.

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PHP 8.2.7 Compilation Error: cURL Included - A Tech Support Guide

Resolve PHP 8.2.7 compilation errors caused by missing cURL development headers or incorrect library paths during configuration.

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Troubleshooting SSL Handshake Issues with Curl: Server Not Responding

Resolve curl SSL handshake timeouts by configuring --connect-timeout and --max-time flags, verifying CA bundles, and inspecting proxy settings.

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How to 'Catch' the Downloaded Filename using wget and cURL Commands?

Extract the original filename from HTTP Content-Disposition headers using wget or cURL for reliable file naming in automation scripts.

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Installing cURL properly on OpenWRT Chaos Calmer (15.05.1) for ar71xx TP-LINK MR3020

Resolves cURL installation failures on OpenWRT Chaos Calmer 15.05.1 for TP-LINK MR3020 by guiding users through connectivity checks, package index updates, and opkg commands.

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CURL Error on Gnutls Handshake

Fix curl GnuTLS handshake errors on Ubuntu 16.04 by updating ca-certificates and enforcing TLS 1.2 support.

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Troubleshooting: Curl SFTP Uploads Empty File without Error

Resolve Curl SFTP uploads creating empty files by verifying local file permissions, remote directory write access, and chroot path resolution.

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