executing a curl request through bash script - bash

Question

I have to insert many data in my application and through the graphical interface it takes many time. For this reason I want to create a bash script and make the requests through curl using the REST API (I have to manually specify the id).
The problem is that i get the error: The server refused this request because the request entity is in a format not supported by the requested resource for the requested method.
Here is the code
#!/bin/bash
for i in {1..1}
do
CURL='/usr/bin/curl -X POST'
RVMHTTP="http://192.168.1.101:8080/sitewhere/api/devices
-H 'accept:application/json'
-H 'content-type:application/json'
-H 'x-sitewhere-tenant:sitewhere1234567890'
--user admin:password"
DATA=" -d '{\"hardwareId":\"$i",\"siteToken\":\"4e6913db-c8d3-4e45-9436-f0a99b502d3c\",\"specificationToken\":\"82043707-9e3d-441f-bdcc-33cf0f4f7260\"}'"
# or you can redirect it into a file:
$CURL $RVMHTTP $DATA >> /home/bluedragon/Desktop/tokens
done
The format of my request has to be json

Answer 1

#!/usr/bin/env bash
rvmcurl() {
local url
url="http://192.168.1.101:8080/sitewhere/${1#/}"
shift || return # function should fail if we weren't passed at least one argument
curl -XPOST "${rvm_curl_args[#]}" "$url" "$#"
}
i=1 # for testing purposes
rvm_curl_args=(
-H 'accept:application/json'
-H 'content-type:application/json'
-H 'x-sitewhere-tenant:sitewhere1234567890'
--user admin:password
)
data=$(jq -n --arg hardwareId "$i" '
{
"hardwareId": $hardwareId,
"siteToken": "4e6913db-c8d3-4e45-9436-f0a99b502d3c",
"specializationToken": "82043707-9e3d-441f-bdcc-33cf0f4f7260"
}')
rvmcurl /api/devices -d "$data"
Note:
Commands, or command fragments intended to be parsed into multiple words, should never be stored in strings. Use an array or a function instead. Quotes inside such strings are not parsed as syntax, and instead (when parsed without eval, which carries its own serious risks and caveats) become literal values. See BashFAQ #50 for a full explanation.
Use a JSON-aware tool, such as jq, to ensure that generated data is legit JSON.
Fully-qualifying paths to binaries is, in general, an antipattern. It doesn't result in a significant performance gain (the shell caches PATH lookups), but it does reduce your scripts' portability and flexibility (preventing you from installing a wrapper for curl in your PATH, in an exported shell function, or otherwise).
All-caps variable names are in a namespace used for variables with meaning to the shell and operating system. Use names with at least one lowercase character for your own variables to prevent any chance of conflict.