Zlib Scraper
Spider read zlib.net in 116 ms without a browser and returned 332 lines of clean markdown.
A Massively Spiffy Yet Delicately Unobtrusive Compression Library![[DDJ's zlib image]](images/zlib_ddj.png)general-purpose, legally unencumbered -- that is, not covered by any patents-- lossless data-compression library for use on virtually any computer hardwareand operating system. The zlib data format is itself portable acrossplatforms. Unlike the LZW compression method used in Unix *compress*(1)and in the GIF image format, the compression method currently used in zlibessentially never expands the data. (LZW can double or triple the file size inextreme cases.) zlib's memory footprint is also independent of the input dataand can be reduced, if necessary, at some cost in compression. A more precise,technical discussion of both points is available on [(decompression). Jean-loup is also the primary author of*gzip*(1), the author of the comp.compression FAQ list andInfo-ZIP](http://www.info-zip.org/pub/infozip/)'s Zip;Mark is also the author of gzip's anddecompression routines and was the original author of Zip. Not surprisingly,the compression algorithm used in zlib is essentially the same as that ingzip and Zip, namely, the `deflate' method that originated inMark can be reached via e-mail atthe **manual** before asking for help.Nearly all of the questions we get already have ananswer in the *zlib* documentation. Questions on the usage of zlib arebest answered on Stack Overflow.zlib development contributions and issues are best addressed onThe deflate and zlib specifications both achieved official Internet RFC status in May 1996,and zlib itself was adopted in version 1.1 of the Java Development Kit (JDK), both as araw class](https://docs.oracle.com/javase/8/docs/api/java/util/zip/package-summary.html) and as a component of the [JAR archiveformat](https://docs.oracle.com/javase/8/docs/technotes/guides/jar/jarGuide.html).The lovely zlib-vise image above was provided courtesy of Bruce Gardner, artdirector of Dr. Dobb's Journal. ItThe same call, in code.
The capture above came back as markdown. These examples add a key, so you get browser rendering, proxies, and concurrency on zlib.net.
import { SpiderBrowser } from "spider-browser";
const spider = new SpiderBrowser({
apiKey: process.env.SPIDER_API_KEY!,
});
await spider.connect();
const page = spider.page!;
await page.goto("https://zlib.net");
// No selectors, no schema. Spider reads the page and names the fields.
const data = await page.scrape();
console.log(data);
await spider.close();import { Spider } from "@spider-cloud/spider-client";
const spider = new Spider({ apiKey: process.env.SPIDER_API_KEY! });
const result = await spider.scrapeUrl("https://www.zlib.net", {
return_format: "markdown",
});
console.log(result);Ready for volume? Get an API key →
Fields you can pull.
Spider names these from the page. The capture above came back as markdown; the same
call with return_format: "json" returns them as keys.
What zlib.net costs to scrape.
The capture above cost $0.000061 to fetch. Pricing is $1 per GB of pre-transformation bandwidth plus $0.001 per CPU minute, so a page like this one lands at a fraction of a cent. Failed requests are billed at $0.
- Free balance on signup
- No card required to test
- Balance never expires
Run it keyless, no account
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Start scraping zlib.net.
You already have the call. A key raises the rate limit and turns on browser rendering, proxies, and concurrency. Balance never expires, and top-ups go through secure checkout.