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I want to calculate shipping rates and shipping methods based on shipping origin. In Cart page shipping estimation and checkout page i want to calculate shipping charges based on different shipping origin locations.
I will have different shipping origins at cart page shipping estimation and checkout page after shipping address save.Now i want to pass dynamic shipping origins to calculate shipping charges.
any suggestions or ideas on where to start and how to get it.

Update:
I want same as Where is the code that calculates shipping from origin.
but how to handle getRateOriginRequest and Mage_Shipping_Model_Shipping::collectRates()

I Want to replace ship-from configuration fields dynamically in shipping estimation and checkout process

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  • Do you have your set up for multiple shipping origins ?
    – Prateek
    Commented Jan 22, 2016 at 7:29
  • @Prateek Please check my updated question.
    – prasad maganti
    Commented Jan 22, 2016 at 7:33
  • Event-observers and re-writes are 2 different approaches. Which one you want to use ?
    – Prateek
    Commented Jan 22, 2016 at 7:38
  • I want to overwrite Mage_Tax_Model_Calculation::getRateOriginRequest and Mage_Shipping_Model_Shipping::collectRates()
    – prasad maganti
    Commented Jan 22, 2016 at 7:41
  • There are plenty of articles about that on web, this is one of them : inchoo.net/magento/…. Is there any other problem you are facing ?
    – Prateek
    Commented Jan 22, 2016 at 9:16

1 Answer 1

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To modify any shipping rates information try to change on 

Mage_Tax_Model_Calculation class and getRateOriginRequest method, 
Mage_Shipping_Model_Shipping` class and 'collectRates()

In my case i have configured only ups shipping method.

So here i need to change the code on

Mage_Usa_Model_Shipping_Carrier_Ups and collectRates method.

This class is executing after

Mage_Shipping_Model_Shipping class and collectRates()

Now i could change the ship-from information.

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