Paypal_lib issue - Orders are always invalid

[eluser]Andrew K[/eluser]
I've been working on a website that will be used for online ordering. As such, I found the paypal_lib plugin for CI (http://codeigniter.com/wiki/PayPal_Lib/) which was very easy and great to work with... however, there's been an issue.

Every order that I attempt (that is, using the Paypal Sandbox), will return "invalid". I checked the paypal IPN log and it seems that all of the variables are being passed properly, but I still receive an "INVALID" during the IPN response.

I opened the log in VIM to view it and saw that the parameters didn't have any ^M in them (which signifies a \r). This leads me to possibly believe that perhaps CI is stripping the \r from the content, perhaps.

I'll be testing a few more things, but does anyone happen to have any clues or ideas?
Thanks for any help!

[eluser]Tom Schlick[/eluser]
there are paypal libs already in this forum. search the forum and check the wiki.

[eluser]Andrew K[/eluser]
Right, that's the library I've been using

I am having an issue where it is always returning INVALID within the responses

[eluser]TheFuzzy0ne[/eluser]
Have you read about the fixes on the Wiki? http://codeigniter.com/wiki/PayPal_Lib/. Looks like it might fix your problem.

[eluser]Andrew K[/eluser]
Yup, did all of those fixes, except the last one. I didn't do the last fix/adjustment because I am not receiving a HTTP/1.1 307 Temporary Redirect, but I'll try that adjustment now to see if it somehow might be affecting my responses.

[eluser]Andrew K[/eluser]
Solved!

Seems that it was my own folly by not following every step in the Wiki. It seems the last step is quite cruicial

The URL you provide the paypal_lib is NOT used as the URL that it receives the IPN response from. I was expecting the URLs to be the same and that's where I was completely wrong!

Thanks for everyone's help.

[eluser]TheFuzzy0ne[/eluser]
Glad you got it sorted. At least now I know to ensure I follow the whole Wiki article next week when I start using the library.

[eluser]TheFuzzy0ne[/eluser]
Ooh, one more thing... Please could you post/attach the modified library? It may save someone some copying and pasting. I know the changes are simple, but it saves anyone making mistakes.