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Editorial Team
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Asked: 2026-05-23T15:29:50+00:00

I am working on an iPhone application that requires the use of a third

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I am working on an iPhone application that requires the use of a third part SOAP web service (I know, SOAP is not preferred, it is just what I am stuck with). Basically user entered data is sent to the web service and I am finding that certain characters will not send and cause the error message below. The one character that causes this that I have run into so far is < . Without the characters it works fine. I want to have the ability to send such characters. I am sending the string with UTF8StringEncoding. Perhaps there is something I can modify to allow such characters?

[req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];

Error:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>Sender</faultcode><faultstring>Invalid XML</faultstring></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>
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1 Answer

  1. Editorial Team

    Seems I have figured this out! So to send the user’s input that include <, I simply send it with:

    [NSString stringWithFormat:@"<![CDATA[\n%@\n]]>", myStringWithIllegalChar]

    Using the CDATA tag allows the string pass through as a soap message.

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