SOAP request in R
This solves the problem:
library(RCurl)headerFields = c(Accept = "text/xml", Accept = "multipart/*", 'Content-Type' = "text/xml; charset=utf-8", SOAPAction = "https://advertising.criteo.com/API/v201010/clientLogin")body = '<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <clientLogin xmlns="https://advertising.criteo.com/API/v201010"> <username>string</username> <password>string</password> <source>string</source> </clientLogin> </soap:Body> </soap:Envelope>'curlPerform(url = "https://advertising.criteo.com/API/v201010/AdvertiserService.asmx", httpheader = headerFields, postfields = body )