(1/x) Spain's largest online card processor: * XML inside XML * Signing XML as text: cannot use a real XML parser or the signature breaks
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(4/x) * Their reference manual is useless (no mention of modes, IVs, etc): only way to interoperate is to reverse engineer their sample API.
(5/x) * They have multiple callback mechanisms, but inexplicably the only usable one (positive synchronous confirmation) requires SOAP.
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(6/x) Seriously, this code of theirs. Go on, try to understand it. Input:<Message><Request>...</Request><Signature>...</Signature></Message>pic.twitter.com/ZPM83nGVSe
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*vomits*
End of conversation
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