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+--- Thread: What are the most useful curl opts for debugging and performance? or How do you optimize your request (/thread-what-are-the-most-useful-curl-opts-for-debugging-and-performance-or-how-do-you-optimize-your-request)
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What are the most useful curl opts for debugging and performance? or How do you optimize your request - MaskedNodeX - 21-12-2024
"Which curl opts do you always use and why?"
hey folks!
i find myself using the same few curl opts *every damn time* but curious what others rely on.
for me, `-v` is a no-brainer—gotta see those headers and full convo.
also `-L` cuz redirects can be sneaky, and `--max-time 10` to avoid hanging forever. oh and `-w "\n%{http_code}"` to slap the status code at the end.
anyone got favorite *underrated* curl opts? maybe stuff for faster retries or better error handling?
(also pls tell me i’m not the only one who forgets `-H "Content-Type: application/json"` half the time lol)
cheers!
“” - deepNomad99 - 01-03-2025
Oh man, `-v` is a lifesaver, but I’ve also gotten hooked on `-sS`—silent but still shows errors. No more noise, just the good stuff.
And for retries? `--retry 3` is my go-to. Sometimes servers just need a little nudge, ya know?
Also, if you’re dealing with APIs, `-H "Accept: application/json"` saves me from XML nightmares.
Pro tip: `curl -w "%{time_total}s\n"` to see how slow your requests really are. Brutal honesty.
“” - CloudHider77 - 22-03-2025
I’m all about `-k` when I’m testing locally and don’t wanna deal with certs. Yeah, it’s sketchy, but hey, dev life.
For debugging, `--trace-ascii /dev/stdout` dumps *everything*. It’s messy but golden when you’re desperate.
And `--compressed`? Underrated. Saves bandwidth and time if the server supports it.
Anyone else use `-o /dev/null` to ditch the response body but keep the rest?
“” - darkDartX88 - 29-03-2025
`-L` is a must, but `--resolve` is my secret weapon. Bypass DNS and go straight to the IP. Perfect for testing before DNS updates.
Also, `-m 5` instead of `--max-time` because I’m lazy and it does the same thing.
For JSON, `-d @file.json` saves me from escaping hell. Just dump your payload in a file and go.
Oh, and `-I` for HEAD requests. Faster than a full GET when you just need headers.
“” - FantomVPN - 31-03-2025
Dude, `-w` is clutch, but I tweak it like this: `-w "status: %{http_code}\nsize: %{size_download}\ntime: %{time_total}\n"`.
Stats at a glance.
Also, `--fail` is underrated. Makes curl return non-zero on HTTP errors, so scripts can actually fail properly.
And `-x` for proxies? Lifesaver when you’re stuck behind corp nonsense.
“” - RouterHider - 03-04-2025
`-v` is great, but `--verbose --trace-time` adds timestamps to each line. Super useful for slow requests.
For retries, `--retry-delay 2` spaces ’em out. No hammering the server like a maniac.
And `-b`/`-c` for cookies? Essential for scraping or anything session-based.
Fun fact: `curl --version` shows all the features your curl supports. Handy for weird opts.
“” - MaskedNodeX - 04-04-2025
Wow, so many gems here! Gonna steal that `-K` trick for sure—config files sound way better than typing opts every time.
And `--fail` is going straight into my scripts. Can’t believe I’ve been ignoring it.
Quick Q: Anyone use `--path-as-is`? Heard it’s handy for weird URLs but never tried.
Also, +1 for `jq`. Already use it, but glad others swear by it too.
Cheers for the tips, folks!
“” - fastPhantom88 - 04-04-2025
I’m a `-X POST` kinda person, but `-F` for multipart/form-data is my dark horse. Upload files like a boss.
Also, `--connect-timeout 3` because waiting 30s for a connection is torture.
And `-A "Mozilla/5.0"` when sites block curl’s default UA. Sneaky sneaky.
For JSON, `jq` is the real MVP. Pipe curl to `jq` and suddenly life makes sense.
“” - secureShifterX - 05-04-2025
`-L` and `-v` are my bread and butter, but `-K` is underrated. Store all your opts in a config file and reuse ’em.
For example, `curl -K myconfig.txt` where `myconfig.txt` has all your headers, timeouts, etc. Saves so much typing.
Also, `--parallel` (if your curl supports it) for firing off multiple requests at once. Speed demon mode.
Oh, and `--stderr -` to mix errors with stdout. Cleaner logging for scripts.