问题描述
我正在寻找一种伪蜘蛛网站的方式。关键是我实际上不需要内容,而是一个简单的URI列表。我可以通过使用来合理地接近这个想法 - spider
选项,但是当通过 grep
输出时,我似乎无法找到正确的方法来实现它:
wget --spider --force-html -r -l1 http://somesite.com | grep'Saving to:'
grep
过滤器似乎完全不会影响 wget
输出。我有什么问题吗?还是有另一种工具,我应该尝试更适合提供这种有限的结果集?
更新
因此,我只是在离线状态下发现,默认情况下, wget 写入stderr。我在手册页中错过了(实际上,如果它在那里,我还没有找到它)。一旦我将输入返回到标准输出,我接近我所需要的:
wget --spider --force-html - r -l1 http://somesite.com 2>& 1 | grep'Saving to:'
我仍然对其他更好的方法感兴趣的东西,如果有的话。
我想要做的绝对的 last 解析所有的内容我自己(即创建我自己的蜘蛛)。一旦我知道Wget默认写入stderr,我就可以将它重定向到stdout并适当地过滤输出。
wget --spider --force-html -r -l2 $ url 2>& 1 \
| grep'^ - '| awk'{print $ 3}'\
| grep -v'\.\(css \ | js\ | png\ | gif\ | jpg\)$'\
> urls.m3u
这给我一个内容资源列表(不是图片的资源,CSS或JS源文件)被蜘蛛的URI。从那里,我可以将URI发送给第三方工具进行处理以满足我的需求。
输出结果仍然需要稍微精简(它会产生重复,因为它是如上所示),但它几乎在那里,我不必自己解析。
I'm looking for a way to pseudo-spider a website. The key is that I don't actually want the content, but rather a simple list of URIs. I can get reasonably close to this idea with Wget using the --spider
option, but when piping that output through a grep
, I can't seem to find the right magic to make it work:
wget --spider --force-html -r -l1 http://somesite.com | grep 'Saving to:'
The grep
filter seems to have absolutely no affect on the wget
output. Have I got something wrong or is there another tool I should try that's more geared towards providing this kind of limited result set?
UPDATE
So I just found out offline that, by default, wget
writes to stderr. I missed that in the man pages (in fact, I still haven't found it if it's in there). Once I piped the return to stdout, I got closer to what I need:
wget --spider --force-html -r -l1 http://somesite.com 2>&1 | grep 'Saving to:'
I'd still be interested in other/better means for doing this kind of thing, if any exist.
The absolute last thing I want to do is download and parse all of the content myself (i.e. create my own spider). Once I learned that Wget writes to stderr by default, I was able to redirect it to stdout and filter the output appropriately.
wget --spider --force-html -r -l2 $url 2>&1 \
| grep '^--' | awk '{ print $3 }' \
| grep -v '\.\(css\|js\|png\|gif\|jpg\)$' \
> urls.m3u
This gives me a list of the content resource (resources that aren't images, CSS or JS source files) URIs that are spidered. From there, I can send the URIs off to a third party tool for processing to meed my needs.
The output still needs to be streamlined slightly (it produces duplicates as it's shown above), but it's almost there and I haven't had to do any parsing myself.
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