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281 | #!/bin/sh
#By h46incon
#Dependences: curl, openssl-util, tr, sort
## ----- Setting -----
AccessKeyId="testid"
AccessKeySec="testsecret"
DomainRecordId="00000"
# DomainRR, use "@" to set top level domain
DomainRR="www"
DomainName="example.com"
DomainType="A"
# The server address of ALi API
ALiServerAddr="alidns.aliyuncs.com"
# A url provided by a third-party to echo the public IP of host
MyIPEchoUrl="http://members.3322.org/dyndns/getip"
# MyIPEchoUrl="http://icanhazip.com"
# the generatation a random number can be modified here
#((rand_num=${RANDOM} * ${RANDOM} * ${RANDOM}))
rand_num=$(openssl rand -hex 16)
## ----- Log level -----
_DEBUG_=true
_LOG_=true
_ERR_=true
## ===== private =====
## ----- global var -----
# g_pkey_$i # param keys
# g_pval_$key # param values
g_pn=0 # number of params
_func_ret=""
## ----- Base Util -----
_debug() { ${_DEBUG_} && echo "> $*"; }
_log() { ${_LOG_} && echo "* $*"; }
_err() { ${_ERR_} && echo "! $*"; }
reset_func_ret()
{
_func_ret=""
}
## ----- params -----
# @Param1: Key
# @Param2: Value
put_param()
{
eval g_pkey_${g_pn}=$1
eval g_pval_$1=$2
g_pn=$((g_pn + 1))
}
reset_param()
{
g_pn=0
}
# This function will init all public params EXCLUDE "Signature"
put_params_public()
{
put_param "Format" "JSON"
put_param "Version" "2015-01-09"
put_param "AccessKeyId" "${AccessKeyId}"
put_param "SignatureMethod" "HMAC-SHA1"
put_param "SignatureVersion" "1.0"
# time stamp
local time_utc=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
_debug time_stamp: ${time_utc}
put_param "Timestamp" "${time_utc}"
# random number
_debug rand_num: ${rand_num}
put_param "SignatureNonce" "${rand_num}"
}
# @Param1: New IP address
put_params_UpdateDomainRecord()
{
put_param "Action" "UpdateDomainRecord"
put_param "RR" "${DomainRR}"
put_param "RecordId" "${DomainRecordId}"
put_param "Type" "${DomainType}"
put_param "Value" "${1}"
}
put_params_DescribeDomainRecords()
{
put_param "Action" "DescribeDomainRecords"
put_param "DomainName" ${DomainName}
}
put_params_DescribeDomainRecordInfo()
{
put_param "Action" "DescribeDomainRecordInfo"
put_param "RecordId" "${DomainRecordId}"
}
pack_params()
{
reset_func_ret
local ret=""
local key key_enc val val_enc
local i=0
while [ $i -lt ${g_pn} ]
do
eval key="\$g_pkey_${i}"
eval val="\$g_pval_${key}"
rawurl_encode "${key}"
key_enc=${_func_ret}
rawurl_encode "${val}"
val_enc=${_func_ret}
ret="${ret}${key_enc}=${val_enc}&"
i=$((++i))
done
#delete last "&"
_func_ret=${ret%"&"}
}
# ----- Other utils -----
get_my_ip()
{
reset_func_ret
local my_ip=$(curl ${MyIPEchoUrl} --silent --connect-timeout 10)
#echo ${my_ip}
_func_ret=${my_ip}
}
get_domain_ip()
{
put_params_public
put_params_DescribeDomainRecordInfo
send_request
local result=${_func_ret}
reset_param
reset_func_ret
_func_ret=$(echo ${result} |grep -Eo '"Value":"[0-9a-f:.]+"' |grep -Eo '[0-9a-f:.]{5,}')
}
# @Param1: Raw url to be encoded
rawurl_encode()
{
reset_func_ret
local string="${1}"
local strlen=${#string}
local encoded=""
local pos c o
pos=0
while [ ${pos} -lt ${strlen} ]
do
c=${string:$pos:1}
case "$c" in
[-_.~a-zA-Z0-9] ) o="${c}" ;;
* ) o=$(printf "%%%02X" "'$c")
esac
encoded="${encoded}${o}"
pos=$(($pos + 1))
done
_func_ret="${encoded}"
}
calc_signature()
{
reset_func_ret
local sorted_key=$(
i=0
while [ $i -lt ${g_pn} ]
do
eval key="\$g_pkey_$i"
echo "${key}"
i=$((++i))
done | LC_ALL=C sort
)
local query_str=""
for key in ${sorted_key}
do
eval val="\$g_pval_${key}"
rawurl_encode "${key}"
key_enc=${_func_ret}
rawurl_encode "${val}"
val_enc=${_func_ret}
query_str="${query_str}${key_enc}=${val_enc}&"
done
query_str=${query_str%'&'}
_debug Query String: ${query_str}
# encode
rawurl_encode "${query_str}"
local encoded_str=${_func_ret}
local str_to_signed="GET&%2F&"${encoded_str}
_debug String to Signed: ${str_to_signed}
local key_sign="${AccessKeySec}&"
_func_ret=$(/bin/echo -n ${str_to_signed} | openssl dgst -binary -sha1 -hmac ${key_sign} | openssl enc -base64)
}
send_request()
{
reset_func_ret
# put signature
calc_signature
local signature=${_func_ret}
put_param "Signature" "${signature}"
# pack all params
pack_params
local packed_params=${_func_ret}
local req_url="${ALiServerAddr}/?${packed_params}"
_debug Request addr: ${req_url}
local respond=$(curl -3 ${req_url} --silent --connect-timeout 10 -w "HttpCode:%{http_code}")
echo ${respond}
_func_ret=${respond}
}
describe_record()
{
put_params_public
put_params_DescribeDomainRecords
send_request
}
update_record()
{
# get ip
get_my_ip
local my_ip=${_func_ret}
# Check if need update
_debug My IP: ${my_ip}
if [ -z "${my_ip}" ]; then
_err Could not get my ip, exitting...
exit
fi
get_domain_ip
local domain_ip=${_func_ret}
_debug Current Domain IP: ${domain_ip}
if [ "${my_ip}" == "${domain_ip}" ]; then
_log Need not to update, current IP: ${my_ip}
exit
fi
# init params
put_params_public
put_params_UpdateDomainRecord ${my_ip}
send_request
}
main()
{
describe_record
#update_record
}
main
|
