Show HN: Gargl – Create an API for any website, without writing a line of code

by jodoglevy • 12 years ago

78 43 12 years ago

yid• 12 years ago

IANAL et al., but unless I'm mistaken, generating an API by analyzing requests and responses would be fine (under the purview of "research purposes"), unless you then subsequently use the generated API to access the service.

Also, it seems like authenticated sites would be difficult to scrape with this, i.e. ones that require login and possibly some logic (like sending a hash of request parameters) with every request.

jodoglevy2• 12 years ago

OP here.

Yes, using the generated API is the issue, not generating one.

As for authenticated sites, as long as the underlying generated module keeps track of cookies received in responses and sends those cookies on subsequent API calls, just like a browser would, it should work fine for "normal" websites that use regular cookies for remembering if user is logged in. Gargl modules generated as PowerShell, or as Javascript (and used in a WinJS project) do this "cookie remembering" today. It could also of course be possible for the user to remember the cookie themselves in their code (after it gets the raw response from the API call), and then pass that cookie into any subsequent API calls manually.

ChuckMcM• 12 years ago

Just as a matter of record you risk getting your IP blacklisted by using something like this without the web sites permission. Perhaps the poster child for web sites that go apeshit is CraigsList but most sites respond in one way or another. One of my favorites are the Markov generated search results that Bing sends back to robots.

jaytaylor• 12 years ago

You raise interesting and valid points. Notably, there is naturally a rather ubiquitous route around getting blocked: use Tor (it will work in many cases, though not all).

The most intriguing thing about this Gargl thing imo is that it is a free version of for-profit SaaS website-to-api offerings such as kimonolabs[0]. I love the nobleness of taking something which is only available as a paid service and creating a free open-source form of it. These kinds of projects help reveal SaaS services which don't actually have strong value-adds despite vendors' claims to the contrary.

[0] hxxp://www.kimonolabs.com/

jodoglevy2• 12 years ago

OP here.

I did a post comparing Gargl to Kimono actually: http://jodoglevy.com/jobloglevy/?p=146

nly• 12 years ago

there is naturally a rather ubiquitous route around getting blocked: use Tor

How about fuck you? Seriously, don't use Tor for scraping sites. Webmasters can and will block Tor exit nodes if they feel the bad traffic outweighs the good.

digitalboss• 12 years ago

FYI Gargl vs Kimono - mentioned at the bottom original article. http://jodoglevy.com/jobloglevy/?p=146

tlrobinson2• 12 years ago

I'll throw my scraper creator in the ring too: http://exfiltrate.org/

acbart• 12 years ago

I made a scraper meant for introductory projects in CS classes! (http://mickey.cs.vt.edu/)

walden422• 12 years ago

Nice, I like it! Pretty easy to use. Only problem is that I couldn't download any file =) When I try downloading a file, it just shows a green box saying it downloaded.

israelyc• 12 years ago

Here's another one. They're pretty good at scale too: http://import.io

pjc50• 12 years ago

Also ScraperWiki: https://scraperwiki.com/

jheriko2• 12 years ago

this is a clever idea - i've had a similar idea many many years ago infact but never followed through because i strongly disagree with making it easy to e.g. abuse google or yahoo by spamming their search engine. as much as i disagree with keeping proprietary secrets i agree more that people should have freedom of choice to do that...

in that regard its nice to see the big warning at the top of the page about ease of misuse (and a refreshing slap in the face - i was thinking 'pfft some hipster forgot common sense again' and expecting not to see anything of the kind)

there is something off here and i can't quite put my finger on it though... as a low level programmer I cringe when I hear web people using API to describe some weird little subset of APIs anyway. Here I feel almost like what this does is takes an existing 'API' (http - the internet) and refactors the interface in highly specific ways to make it easier to use...

At any rate. Its a clever idea and nice to see such a well thought through implementation - but its also far too open to misuse imo. I wish the creator the best of luck... hopefully no takedown requests too soon.

stringham• 12 years ago

I wouldn't call http an api. Http is a protocol.

jheriko2• 12 years ago

any interface that is designed to be, and can be used by, software is technically an api...

the thing i was trying to stab at was the recent popularity of 'API' as a term and the way it is applied...

marcosdumay• 12 years ago

Here I feel almost like what this does is takes an existing 'API' (http - the internet) and refactors the interface in highly specific ways to make it easier to use...

That's what all libraries do. If we can't call that an API, we'll only be able to use the name for bare I/O operations.

notastartup• 12 years ago

so the usage of the data is where the legality is concerned. if your users scrape a site and you host it through accessible means, you can get sued but not if you provide a flat csv file?

Armchair lawyers please advise, we need more details.

loceng3• 12 years ago

I think a better business model would be creating a service that identifies scrapers, and then blocks them. I think one might already exist, though I can't remember its name.

eli3• 12 years ago

I don't think either is a really great idea. I think most of the people who would pay to block web scrapers are either being paranoid or are being scraped by people smart and resourceful enough to get around your filters. Any serious web scraper is going to be scripting a real browser engine, so it's going to act just like a real visitor.

matznerd5• 12 years ago

There are ways to detect scrapers and other bots if you really want to and services that do so.

anigbrowl• 12 years ago

I wish all tools were presented with this level of clarity and depth. Really great introduction ion contrast to the usual technobabble.

benwilber0• 12 years ago

Your description of the problem and solution is too verbose. I need bullet points describing 1) my problems, 2) how my problems are solved by this. I'm not going to read a full-on blog post to figure out if this is relevant to me.

dfgonzalez• 12 years ago

Love these scrapper template generators. I wonder why you chose Java instead of something like PhantomJS to run the scrapper.

platz2• 12 years ago

um, the whole thing is language agnostic, no?

matznerd5• 12 years ago

The APIs generated are agnostic, but the tool to create them is java based.

brey• 12 years ago

  if you can see or submit data using the website, it means the website does 
  have some kind of API ... For example, if you do a search in Yahoo, you can
  see the search page sent to Yahoo’s servers has the following url ...

  https://search.yahoo.com/search?p=search+term

no. no no no. this is not an API. this is about as far from an application programming INTERFACE as it can get. this means an agreed format, where there's a contract (social or otherwise) to provide stability to APPLICATION clients. there's no contract here other than 'a human types something into the box, presses some buttons and some results appears on the website'.

/search?p=search+term is an implementation detail hidden from the humans the site is built for. they can, and most likely will, change this at any time. the HTML returned (and being scraped) is an implementation detail. today, HTML. tomorrow, AJAX. next week? who knows, maybe Flash.

fine, it's a scraper builder. but don't call what it's using an API, and don't imply it's anything more than a fragile house of cards built on the shaky foundation of 'if you get noticed you're going to get banned or a cease and desist'.

h3ro• 12 years ago

I do this kind of stuff with wget, sed, awk so far, but it's nice to see some more thought-out alternatives.

What I like most about your competition though is the JS interface that gets used for one good last thing (before being properly scraped and de-AD- and de-java-fied): clicking on the content you want, and deselecting content you don't want: subtly, with your mouse you lead a pattern-matching algorithm doing the annoying work.

Honestly the simplicity of this interface is even more breathtaking to me than gargl :P But it's even more limited, as after clicking twice it thinks that it has understood the pattern already, although that might not be the case.

I'd suggest to integrate the idea, but to make the learning process more clever, make it possible to select more things, even though the engine thinks there can't be any more similar things. Give that AI more things to learn from. We want more identifiers than just counts and HTML elements: "2nd subelement of <h1>".

There's good stuff you can do with statistics, too. Some data exists only once, some exists only 3 times, some always exists over 10 times. That's valuable info. Some data has many words of whitespace seperated text - oh a paragraph!

tldr We need something that generates good semantics out of normal web sites automatically, so that users can use a simple Web UI mangled into the target web site to choose the right pattern.

Show HN: Gargl – Create an API for any website, without writing a line of code

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