bash 在脚本中运行 curl 时出错（没有这样的文件或目录）
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Error when running curl inside script (No such file or directory)
提问by Brad
I have the following .sh file I pieced together off of things I found on the internet.
The goal is to read the 2nd line 2nd item in a CSV file and use that to send a delete commmand to elasticsearch.
我有以下 .sh 文件，我从网上找到的东西拼凑起来。
目标是读取 CSV 文件中的第二行第二项，并使用它向 elasticsearch 发送删除命令。
#!/bin/sh
OLDIFS=$IFS
IFS=,
function quit {
echo "Quitting Script"
IFS=$OLDIFS
exit 1
}
function fileExists {
if [ ! -f "" ]
then
echo "File does not exists"
quit
fi
echo "File Name: "
}
function work {
linesToSkip=1
{
for ((i=$linesToSkip;i--;)) ;do
read
done
#Read 2nd item of the 2nd line of CSV file to get PROGRAMURL
read INDEX PROGRAMURL JUNK
echo "$PROGRAMURL"
QUERY="curl -XDELETE http://127.0.0.1:9200/cj/_query -d '{ \"query\" : { \"match\" : { \"PROGRAMURL\" : "$PROGRAMURL" } } }'"
$("$QUERY")
#RESPONSE=`$QUERY`
#echo $RESPONSE
} <
}
fileExists
work
IFS=$OLDIFS
Everything works except the execution of the curl script. I've tried it with $(), backtics, exec, and I cannot get it to work.
除了执行 curl 脚本外，一切正常。我已经用 $()、backtics、exec 试过了，但我无法让它工作。
The following is the error when I run bash -vx script.sh:
以下是我运行 bash -vx script.sh 时的错误：
bash -vx ./deleteExisting.sh catalog.csv
#!/bin/sh
OLDIFS=$IFS
+ OLDIFS='
'
IFS=,
+ IFS=,
function quit {
echo "Quitting Script"
IFS=$OLDIFS
exit 1
}
function fileExists {
if [ ! -f "" ]
then
echo "File does not exists"
quit
fi
echo "File Name: "
}
function work {
linesToSkip=1
{
for ((i=$linesToSkip;i--;)) ;do
read
done
#Read 2nd item of the 2nd line of CSV file to get PROGRAMURL
read INDEX PROGRAMURL JUNK
echo "$PROGRAMURL"
QUERY="curl -XDELETE http://127.0.0.1:9200/cj/_query -d '{ \"query\" : { \"match\" : { \"PROGRAMURL\" : "$PROGRAMURL" } } }'"
$("$QUERY")
#RESPONSE=`$QUERY`
#echo $RESPONSE
} <
}
fileExists
+ fileExists catalog.csv
+ '[' '!' -f catalog.csv ']'
+ echo 'File Name: catalog.csv'
File Name: catalog.csv
work
+ work catalog.csv
+ linesToSkip=1
+ (( i=1 ))
+ (( i-- ))
+ read
+ (( 1 ))
+ (( i-- ))
+ read INDEX PROGRAMURL JUNK
+ echo '"http://www.website.com"'
"http://www.website.com"
+ QUERY='curl -XDELETE http://127.0.0.1:9200/cj/_query -d '\''{ "query" : { "match" : { "PROGRAMURL" : "http://www.website.com" } } }'\'''
"$QUERY")
"$QUERY"
++ 'curl -XDELETE http://127.0.0.1:9200/cj/_query -d '\''{ "query" : { "match" : { "PROGRAMURL" : "http://www.website.com" } } }'\'''
./deleteExisting.sh: line 29: curl -XDELETE http://127.0.0.1:9200/cj/_query -d '{ "query" : { "match" : { "PROGRAMURL" : "http://www.website.com" } } }': No such file or directory
IFS=$OLDIFS
+ IFS='
'
Example CSV file would be
示例 CSV 文件将是
INDEX, PROGRAMURL, other, info
"1", "http://website.com", "other info", "information"
回答by 6EQUJ5
Running $("$QUERY")actually tries to run in a sub-shell, a command called <the expanded value of $QUERY>, hence your '(bunch of stuff) No such file or directory'error.
运行$("$QUERY")实际上尝试在子外壳中运行，一个名为 的命令<the expanded value of $QUERY>，因此您的 '(bunch of stuff) No such file or directory'错误。
You probably want something like:
你可能想要这样的东西：
CURLURL="http://127.0.0.1:9200/cj/_query"
CURLDATA='{ "query" : { "match" : { "PROGRAMURL" : "'$PROGRAMURL'" } } }'
RESPONSE=`curl -XDELETE "$CURLURL" -d "$DATA"`
The trick here is how you nest the single and double quotes. Its a bit hard to explain concisely, but here goes:
这里的技巧是如何嵌套单引号和双引号。简明扼要地解释有点困难，但这里是：
- Shell variables do not expand inside an outer single quote.
- But you dont need to escape a double quote inside a single quote
- So how we get
$PROGRAMURLto expand above is immediately concatenate it between a pair of closing-opening single quotes. - To subsequently use the variable
CURLDATAit has to get passed to thecurlcommand inside double quotes - A much simpler example:
- Shell 变量不会在外部单引号内扩展。
- 但是你不需要在单引号内转义双引号
- 所以我们如何
$PROGRAMURL在上面进行扩展是立即将它连接在一对关闭-打开单引号之间。 - 要随后使用该变量，
CURLDATA它必须传递给curl双引号内的命令 - 一个更简单的例子：
VARIABLE1="Hello, world"
VARIABLE2='This is "$verbatim" stuff"'$VARIABLE1'" More stuff'
- This produces a value of
$VARIABLE2ofThis is "$verbatim" stuff"Hello, World" More stuff
- 这产生的值
$VARIABLE2的This is "$verbatim" stuff"Hello, World" More stuff
Other things to note:
其他注意事项：
- The above will put the entire stdout of the
curlcommand into the variableRESPONSE - You will need to check
$?afterwards to see if curl actually managed to talk to the host, etc. - it will be 0 if everything went OK - You may wish to turn off the progress bar
- 以上将把
curl命令的整个标准输出放入变量中RESPONSE - 之后您需要检查
$?curl 是否真的设法与主机对话等 - 如果一切正常，它将为 0 - 您可能希望关闭进度条
Skipping lines:
跳线：
- A better way to skip lines is to use:
- 跳过行的更好方法是使用：
tail -n +$(( $linesToSkip +1 ))
