rforcecom.login <-
function(username, password, instanceURL, apiVersion){
# Load packages
if(!require(XML)){ install.packages("XML"); stop(!require(XML)) }
if(!require(RCurl)){ install.packages("RCurl"); stop(!require(RCurl)) }
# Soap Body
soapBody <- paste('<?xml version="1.0" encoding="utf-8" ?> \
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" \
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" \
xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"> \
<env:Body> \
<n1:login xmlns:n1="urn:partner.soap.sforce.com"> \
<n1:username>', username, '</n1:username> \
<n1:password>', password, '</n1:password> \
</n1:login> \
</env:Body> \
</env:Envelope>\n\n', sep="")
# HTTP POST
h <- basicHeaderGatherer()
t <- basicTextGatherer()
URL <- paste(instanceURL, rforcecom.api.getSoapEndpoint(apiVersion), sep="")
httpHeader <- c("SOAPAction"="login","Content-Type"="text/xml")
curlPerform(url=URL, httpheader=httpHeader, postfields=soapBody, headerfunction = h$update, writefunction = t$update, ssl.verifypeer=F)
# BEGIN DEBUG
if(exists("rforcecom.debug") && rforcecom.debug){ message(URL) }
if(exists("rforcecom.debug") && rforcecom.debug){ message(t$value()) }
# END DEBUG
# Parse XML
x.root <- xmlRoot(xmlTreeParse(t$value(), asText=T))
# Check whether it success or not
faultstring <- NA
try(faultstring <- iconv(xmlValue(x.root[['Body']][['Fault']][['faultstring']]), from="UTF-8", to=""), TRUE)
if(!is.na(faultstring)){
stop(faultstring)
}
# Retrieve sessionID from XML
sessionID <- xmlValue(x.root[['Body']][['loginResponse']][['result']][['sessionId']])
instanceURL <- sub('(https://[^/]+/).*', '\\1', xmlValue(x.root[['Body']][['loginResponse']][['result']][['serverUrl']]))
return(c(sessionID=sessionID, instanceURL=instanceURL, apiVersion=apiVersion))
}
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