Linux 如何通过远程文件读取 BASH 中的参数？
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How can i cat a remote file to read the parameters in BASH?
提问by
How can i cat a remote file? Where it works for local file only.
我如何才能获取远程文件？它仅适用于本地文件。
#!/bin/bash
regex='url=(.*)'
# for i in $(cat /var/tmp/localfileworks.txt);
for i in $(cat http://localhost/1/downloads.txt);
do
echo $i;
# if [[ $i =~ $regex ]]; then
#echo ${BASH_REMATCH[1]}
#fi
done
cat: http://localhost/1/downloads.txt: No such file or directory
cat: http://localhost/1/downloads.txt: 没有那个文件或目录
采纳答案by ruakh
Instead of cat, which reads a file from the file-system, use wget -O- -q, which reads a document over HTTP and writes it to standard output:
而不是cat，它从文件系统读取文件，而是使用wget -O- -q，它通过HTTP读取文档并将其写入标准输出：
for i in $(wget -O- -q http://localhost/1/downloads.txt)
(The -O...option means "write to the specified file", where -is standard output; the -qoption means "quiet", and disables lots of logging that would otherwise go to standard error.)
（该-O...选项表示“写入指定文件”，其中-是标准输出；该-q选项表示“安静”，并禁用大量日志记录，否则会导致标准错误。）
回答by Rob Wouters
You can use curl:
您可以使用curl：
curl http://localhost/1/downloads.txt
回答by halm
Why are you using a URL to copy from the local machine? Can't you just cat directly from the file?
为什么要使用 URL 从本地机器复制？你不能直接从文件中 cat 吗？
If you aredoing this from a remote machine and not localhost, then as far as I know you can't pass a URL to cat.
如果您是从远程机器而不是本地主机执行此操作，那么据我所知，您无法将 URL 传递给 cat。
I would try something like this:
我会尝试这样的事情：
scp username@hostname:/filepath/downloads.txt /dev/stdout
As someone else mentioned you could also use wgetinstead of scp.
正如其他人提到的，您也可以使用wget而不是scp。
