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Show HN: Curl https://ec2.shop
- kureikain 6y agoFrom time to time, I want a quick tool to help me compare EC2 instances price. https://ec2instances.info/ https://ec2instances.info/ works great but it's somewhat slow and didn't have a way to just `curl` from terminal. So I develop this small tool which you can do thing like curl https://ec2.shop curl https://ec2.shop?region=us-west-2&filter=t2,m4
- tinhspace 6y agoThank you so much. Going to try this one, very useful tool.
- simedw 6y agoUseful tool! Do you not need to escape the ampersand in the second example? otherwise bash will run it in the background and skip the `filters=t2,m4` part.
- bdcravens 6y agoYes, but many terminals will escape it for you if you paste in.
- JimDabell 6y agoAre you manually detecting Curl specifically? If I use anything other than Curl, e.g. HTTPie or wget, I get the HTML page, even if I provide an `Accept: text/plain` request header. If I use one of those tools and spoof the Curl user agent string, I get the text/plain response. You should probably just look at the Accept request header, it’s there specifically so clients can tell you what kind of response they want.
- jasonjayr 6y agoThere should be a new mime type for this: text/x-ansi
- gruez 6y agobut why "ansi"? ANSI is only an encoding. You can have html that's in ansi, and you can have something like OP's that's not in ansi (eg. if you add emojis).
- geofft 6y agoThis is "ANSI" as in ANSI X3.64 escape sequences, not "ANSI" as in a character encoding. You can output color to curl on an ANSI-compatible terminal but not to something expecting actual plain text like a browser.
- skissane 6y agoI think text/ecma48 would be a better name. There are lots of ANSI standards. (I guess text/ansi-x3.64 might also work, but text/ecma48 seems simpler.)
- jasonjayr 6y agoYes, I should have been more specific. text/x-term-${TERM} probably would be better, since it could be any number of terminal types...
- nitrogen 6y agoYou might be thinking of ASCII?
- gruez 6y agohttps://en.wikipedia.org/wiki/ANSI_character_set https://en.wikipedia.org/wiki/ANSI_character_set
- kureikain 6y agoGreat idea. I just implement it: https://github.com/yeo/ec2.shop/commit/ab258aef3ac2ad3d45b26d76304476424379a77c https://github.com/yeo/ec2.shop/commit/ab258aef3ac2ad3d45b26... Now by default it's text mode, so request by http client library or tool like curl, wget, httppie all get text bersion. Only when detecting `Accept` contains `html` and user agent is safari/chrome/firefox etc it send html version.
- karmakaze 6y agoThere should be no reason to check user agent if already checking `Accept`. That's usually more for browser quirks or allow/blocking.
- brodouevencode 6y agoAnd it has to be infinitely better than using the pricing API.
- echeese 6y agoThe prices column is sorted lexicographically, instead of numeric, i.e. 1, 10, 2
- YoavR7 6y agoCool! You should probably add http support and not only https. Writing `curl ec2.shop` is easier than `curl https://ec2.shop` https://ec2.shop`
- saurik 6y agoFor HTTPS to truly be meaningful we need to stop supporting HTTP as an on-ramp, to prevent people from just hijacking that initial unencrypted connection and sending anything they want.
- Znafon 6y agoIf you MITM and the user agent send an HTTP request for ec2.shop it does not matter whether the webserver supports HTTP or not, you can send a fake HTTP response either way.
- hnlmorg 6y agoThat was the GPs point.
- mschuster91 6y agoAnyone who likes to prevent that can submit their site to the HSTS preload list. Chrome, Firefox and Edge use a shared one, the only two relevant other agents (Safari and curl) unfortunately don't though.
- flatiron 6y agoThis is about curl though.
- xxpor 6y ago(speaking only for myself, not my employer) I truly do not care if someone goes through the effort to MITM my curl of ec2.shop to inject fake prices or something like that. There's nothing here that's going to be executed, it'll just be printed or grepped. In theory you could exploit a 0 day in curl or my terminal or something like that, but I think if you truly think about the risks and tradeoffs here it's really not worth worrying about. If curl had an hsts list to make this irrelevant that'd also be cool.
- m00dy 6y agonow curl is the new black ? :) This is not my first time that I see curl based services.
- zkirill 6y agoSuper! It would be great to see price per month as well.
- solatic 6y agoColor output seems to be tuned for dark terminal backgrounds. Memory, vCPUs, and Storage are nearly unreadable on a white background.
- hnlmorg 6y agoI've moaned about this with other CLI tools as well. I wish trend of using RGB values in ANSI escape codes would die because as ugly as the 16*3 colour fields¹ are, they are at least customisable so people can use palettes that suite their terminal and eyesight. You don't get any such opportunity if the developers hard code the colour values in (and it's worse with a tool like this because you can't even set an environmental variable to change the tools behaviour) ¹ sixteen colours plus bright and dark variants
- ASVVVAD 6y agoCan you link me to a way to use colours that change with the terminal colour preset? I haven't come across anything like that or maybe didn't pay attention. It would be really helpful You said you can't even set an env variable to change them so I assume that there is an even better way?
- hnlmorg 6y agoWikipedia has a good section on the different methods of describing colour: https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit I've got some Go code that you can reuse if you want to the escape codes in Go: https://github.com/lmorg/murex/blob/master/utils/ansi/codes.go https://github.com/lmorg/murex/blob/master/utils/ansi/codes.... Just bare in mind that any numbers you see in documentation are sent as ASCII values rather than integers. eg `ESC[31m` (red text) should be sent to the terminal as []byte{ // http://www.asciitable.com/ 27, // ESC character code 91, // '[' 51, // '3' 49, // '1' 109, // 'm' } Though, as you know, most languages will have some syntactic sugar to translate characters to their ASCII values, eg 'm' == 109 Asc("m") == 109 ...etc... so at least you don't have to write all those values by hand.
- baliex 6y agoCould you update the `...&filter...` example to wrap the URL in quotes so that the `&` isn't interpretted by the shell as sending the process to the background?
- elemenophy 6y agothis is an issue of ZSH.
- wolfgang42 6y agoNo, plain sh also uses the ampersand as a job control operator.
- hnlmorg 6y agoThat is a POSIX standard and not something specific to zsh
- kureikain 6y agoAh crap, yes, going to update it.
- JosephRedfern 6y agoVery hand. Can you add sorting?
- hnlmorg 6y ago...or remove the pretty line glyphs so this tool can be used in a normal CLI pipeline (eg `sort`)
- certifiedloud 6y agoYou can always pipe to sort
- afshinmeh 6y agoNice! thanks for using https://gridjs.io https://gridjs.io :)
- cheeaun 6y agoIs this open sourced? I personally try looking into implementing a curl "interface" to one of my projects, realised that it actually need to check the user-agent (of curl and a plethora of curl alternatives) which I find kind of weird...
- codetrotter 6y ago> realised that it actually need to check the user-agent Like someone suggested for the featured page as well, I recommend you make use of the accept header. For example, assuming your interface is outputting freeform text (since the goal was to have something readable in terminal), you could use something like this: Accept: text/vnd.myproject.tui+plain; version=1.0 (Substitute “myproject” with the actual name of your project.)
- kureikain 6y agoHey, yes it's 100% open source. https://github.com/yeo/ec2.shop https://github.com/yeo/ec2.shop The reason it check `curl` agent is because it share the same endpoint (root url) for both of `curl` page and browser version(the one with dropdown, grid etc)
- cheeaun 6y agoI see, thanks!
- shitloadofbooks 6y agoI really like this, but the horizontal lines are not helpful at all and just double the number of lines for no benefit. You can obviously curl ec2.shop | grep -v ─ but I'm not sure I want to do that every time and I'm not exactly sure why, but when I do that, I can't select the entire row, only a column at a time (zsh on iTerm 2).
- alexellisuk 6y agoCould you have it retain the sort order when changing region?
- kolinkorr839 6y agoIs there a way to show the output in json format?
- mike-cardwell 6y agoWould be nice if both of these work (they don't): curl https://ec2.shop https://ec2.shop -H 'Accept: application/json' curl https://ec2.shop?json https://ec2.shop?json
- kureikain 6y agoIt should work that way now :-). Thanks for suggestion.
- kureikain 6y agoPer suggest by mike-cardwell, I implemented this: curl https://ec2.shop -H 'Accept: application/json' curl 'https://ec2.shop?json' curl 'https://ec2.shop?txt'
- dxxvi 6y agoCan I be sure that the prices from this endpoint are accurate (i.e. if Amzn changes the prices, this endpoint will reflect that change)? Off-topic: if I request a spot instance, is there any way (API/cli) to know how much Amzn charges me every hour for that instance?
- gen220 6y agoI've built something like this in the past (I was running a beefy server for my friends, and wanted them to know how much it was costing us at an hourly rate, before they ran it for 3 weeks straight). It's definitely possible and not very challenging, but the API Documentation for prices was pretty weak when I built it (a year or two ago, written in Go if it makes a difference). The google cloud prices API was similarly gross. It was kinda fun, but I wouldn't enjoy maintaining that code. In reality, it turns out that $/hour isn't a super straightforward metric (there are many dimensions that go into it), so it's not super straightforward to query.
- kureikain 6y agoI think the price is accurate. It's fetched directly from this Amazon endpoint. https://github.com/yeo/ec2.shop/blob/master/download.sh#L9 https://github.com/yeo/ec2.shop/blob/master/download.sh#L9 I'm going to add spot instance. Will just need to figure out what URL AWS is fetching
- vmception 6y agoI like this trend
- css 6y agoVery neat. Anyone know why curl -s https://ec2.shop | grep 't2' would work, but curl -s https://ec2.shop | grep 'm4' does not? Both commands work if I write the curl result to a file, but when I pipe from curl, the pattern `m4` matches all instances of the number 4.
- wolfgang42 6y agoIt’s not matching every number 4, just the ones at the start of a column. The m is coming from “ESC[31m”, the escape code used to set the color of the text in the column.
- kureikain 6y agoThank you, this is a bug. The color code for blue is `"\033[34m` so it always match m4 for anything :(. Just push a fix by disabling color as suggestion in here as well
- css 6y agoAh, got it, thanks for the clarity.
- kureikain 6y agoWow, thank you for the feedback. I'm going to implement lot of features suggest in this page. Since I cannot edit original comment, yes, the site is open source: https://github.com/yeo/ec2.shop https://github.com/yeo/ec2.shop
- kissgyorgy 6y agoYou can do cool things with this very quickly. For example, I always wondered the price differences between different regions, you can compare two instance prices quickly: diff -u <(curl -sS "https://ec2.shop?region=eu-central-1" | grep "t3.large" ) <(curl -sS "https://ec2.shop?region=us-east-1" | grep "t3.large")
- kstrauser 6y agoBravo. This is really lovely!
- nnx 6y agoInteresting tool. Would be really useful if it supported Spot prices, which are even more of a PITA to find using Amazon’s UI.
- kureikain 6y agoYes, it isn't that hard to support Spot prices but the price change too often so I have to scrape it for every 5 minutes. Right now, I haven't had the automation to run this yet but it's doable and my pain point too =)
- soerface 6y agoNeat! The prices are without currency symbols - I guess it's always USD? Or maybe dependent on the region…? Would be nice if the $ symbol is printed, and even better if I could see the prices of my european servers in european currency - maybe add a param to select the currency? It would be very helpful if you would support the `Accept: application/json` header. This way, we could use it in combination with jq to do arbitrary filtering: curl -L -H "Accept: application/json" ec2.shop | jq .
- xhrpost 6y agoNeat, didn't realize how much the options for ec2 have grown over time. Can those instances with 100Gbps networking actually push that to upstream transit (ie. the Internet)? Or is that mostly for internal network communication between instances and other AWS services?
- nine_k 6y agoThe examples miss the opening quote before the URLs. Illustration: http://dmitry.cheryasov.info/random/missing-quote-mark.jpg http://dmitry.cheryasov.info/random/missing-quote-mark.jpg
- ryanmccullagh 6y agoNice list. Recently, I loaded all the prices into an Excel document to make things easier for projecting costs and determining prices. I always use the following formula for estimating monthly costs on Amezmo. $Hourly * 750 750 being the number of hours in 1 month.