Curl a string with whitespaces and characters in it?
You don't want to insert literal quotes into the string. You just want to put quotes around the variable. I would do this:
#!/bin/bash
hw_data=$(/usr/sbin/system_profiler SPHardwareDataType)
ram=$(grep Memory: <<<"$hw_data")
model=$(grep Model <<<"$hw_data")
cpuname=$(grep Processor <<<"$hw_data")
cpucores=$(grep Cores: <<<"$hw_data")
serial=$(grep Serial <<<"$hw_data")
macaddr=$(ifconfig | grep en0 -A3 | grep ether)
loggedin=$(finger | tail -1)
hostname=$(hostname)
avdelning=$1
user=$2
url="ip.ip.ip.ip/documentation/index.php"
url+="?avdelning=${avdelning}"
url+="&user=${user}"
url+="&hostname=${hostname}"
url+="&model=${model}"
url+="&RAM=${ram}"
url+="&CPU=${cpuname}"
url+="&CPUCORES=${cpucores}"
url+="&MACADDRESS=${macaddr}"
url+="&SERIALNUMBER=${serial}"
url+="&LASTLOGGEDIN=${loggedin}"
curl "${url// /}"
# ^ ^ <- these are the critical quotes
Read this for more about how critical quoting is: Security implications of forgetting to quote a variable in bash/POSIX shells
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Denniz
Updated on September 18, 2022Comments
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Denniz over 1 year
I'm trying to create a "simple" script that I'm going to use to create some documentation for Unix/Mac machines. I've successfully received the information I need, but it seems like I can't send it over to a webserver I've created with CURL because it gives some whitespaces and characters in the information output. I've tried with very many methods but nothing seems to work correctly..
This is the URL output that the script will send over to curl:
"ip.ip.ip.ip/documentation/index.php?avdelning=XX&user=XXX&hostname=XXX&model=ModelName:MacminiModelIdentifier:Macmini4,1&RAM=Memory:8GB&CPU=ProcessorName:IntelCore2DuoProcessorSpeed:2.4GHzNumberofProcessors:1&CPUCORES=TotalNumberofCores:2&MACADDRESS=etherxx:xx:xx:xx:xx:xx&SERIALNUMBER=SerialNumber(system):XXXXXXXX&LASTLOGGEDIN=XXXXX
Using only the following string will work if I do it directly with CURL and will not give me any errors and I receive the information on the webserver.
But when I use the script it does not work. The script:
#!/bin/bash STR_RAM=$(/usr/sbin/system_profiler SPHardwareDataType | grep Memory: | sed 's/ //g'); STR_MODEL=$(/usr/sbin/system_profiler SPHardwareDataType | grep Model | sed 's/ //g'); STR_CPUNAME=$(/usr/sbin/system_profiler SPHardwareDataType | grep Processor | sed 's/ //g'); STR_CPUCORES=$(/usr/sbin/system_profiler SPHardwareDataType | grep Cores: | sed 's/ //g'); STR_SERIAL=$(/usr/sbin/system_profiler SPHardwareDataType | grep Serial | sed 's/ //g'); STR_MACADDR=$(ifconfig | grep en0 -A3 | grep ether | sed 's/ //g'); STR_LOGGEDIN=$(finger | tail -1 | sed 's/ //g'); STR_HOSTNAME=$(hostname | sed 's/ //g'); STR_URL=ip.ip.ip.ip/documentation/index.php?avdelning=$1\&user=$2\&hostname=$STR_HOSTNAME\&model=$STR_MODEL\&RAM=$STR_RAM\&CPU=$STR_CPUNAME\&CPUCORES=$STR_CPUCORES\&MACADDRESS=$STR_MACADDR\&SERIALNUMBER=$STR_SERIAL\&LASTLOGGEDIN=$STR_LOGGEDIN; STR_URL2=$(echo $STR_URL | sed 's/ //g' | awk '{printf("\"%s\"\n", $0);}'); curl $STR_URL2;
As you can see I've added a bunch of probably unnecessary editing with sed and awk but nothing seems to work.
I get these error messages: After I added the awk to add double quotes before and after the URL string I get:
Could not resolve "ip.ip.ip.ip
Which is very strange since I can run the curl command directly in terminal without that error. And If I do not remove the spaces etc I receive multiple lines that the URL can not be resolved. I've tried with urlencoding in perl and bash but that does not seem to fix the problem either.
I'm running this on a Mac now. Usage: sudo sh script.sh randomstring randomstring
EDIT: Output of new script
sudo sh script2.sh IT Denniz curl: (3) Illegal characters found in URL xx.xx.xx.xx/documentation/index.php?avdelning=XX&user=Denniz&hostname=admins-Mac-mini-2.local&model=ModelName:Macmini ModelIdentifier:Macmini4,1&RAM=Memory:8GB&CPU=ProcessorName:IntelCore2Duo ProcessorSpeed:2.4GHz NumberofProcessors:1&CPUCORES=TotalNumberofCores:2&MACADDRESS= etherXX:XX:XX:XX:XX&SERIALNUMBER=SerialNumber(system):XXXXXXXXXXX&LASTLOGGEDIN=adminadmins008Jun10:21
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Denniz almost 8 yearsExactly what I thought, that's why I added awk '{printf("\"%s\"\n", $0);} which did not work unforunatley, then I receive the error message that it can not resolve "ip.ip.ip.ip
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Angel Todorov almost 8 yearsStronger than that: always quote your variables unless you know exactly what side effects you want by leaving them unquoted (and those side effects can be very subtle)
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eyoung100 almost 8 yearsIs there a link you can provide for the different types of string expansion? i.e. single quotes vs double vs none.
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eyoung100 almost 8 yearsPerfect... Now the proof is there for other readers.
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Denniz almost 8 yearsThank you it seems more promising now but still it does not work! Now it gives me this error: Curl (3): Illegal characters found in URL. Tried with --globoff without succes.. Could it be (system) that's illegal? Or commas? I've tried to google which characters are disallowed without succes..
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Angel Todorov almost 8 yearsIn your question, so you can properly format, show the output of
echo "${url// /}"
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Denniz almost 8 yearsAlright, edited the post with the new output! Thank you so much for helping me!
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Angel Todorov almost 8 yearsYou need to filter the hw_data better.
grep Processor
is returning more than one line so you have newlines in the url