Re: Problems when user hit back
This WebDNA talk-list message is from 2000
It keeps the original formatting.
numero = 34503
interpreted = N
texte = >Could you explain this a bit, Sam? >Sure. The problem was that when someone hits Reload on the shopping cart page or Back from the invoice page it can affect the shopping cart by adding multiple instances of a single sku. So since I am using the rn=[random] trick to solve browser caching issues anyway I also use it to solve this problem.> >[showif [action]=Add] >> > >[text]oldRandom=[orderfile cart=[cart]][header20][/orderfile][/text]When someone adds an item to my shopping cart page I check to see if this request is coming from their cache by comparing the header20 value to the rn value that is passed to the page.> >[hideif [oldRandom]=[rn]]So if the oldRandom=rn then this request is not unique and is probably caused by someone hitting Reload or Back from the invoice page.> >[addlineitem >>cart=[cart]&db=^Editions.db&sku=[SKU]]quantity=[qty][/addlineitem] >>[SetHeader cart=[cart]&db=^editions.db]Header20=[rn][/SetHeader]If it is unique and rn does not equal oldRandom then I go ahead and add the line item to the cart and I set header20 to the current rn value> >[/hideif] > >[/showif]Does that make better sense?-- Sam LewisSamLewis.com Tel: 626-852-0956 Fax: 916-404-5698------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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Associated Messages, from the most recent to the oldest:
>Could you explain this a bit, Sam? >Sure. The problem was that when someone hits Reload on the shopping cart page or Back from the invoice page it can affect the shopping cart by adding multiple instances of a single sku. So since I am using the rn=[random] trick to solve browser caching issues anyway I also use it to solve this problem.> >[showif [action]=Add] >> > >[text]oldRandom=[orderfile cart=[cart]][header20][/orderfile][/text]When someone adds an item to my shopping cart page I check to see if this request is coming from their cache by comparing the header20 value to the rn value that is passed to the page.> >[hideif [oldRandom]=[rn]]So if the oldRandom=rn then this request is not unique and is probably caused by someone hitting Reload or Back from the invoice page.> >[addlineitem >>cart=[cart]&db=^Editions.db&sku=[SKU]]quantity=[qty][/addlineitem] >>[SetHeader cart=[cart]&db=^editions.db]Header20=[rn][/SetHeader]If it is unique and rn does not equal oldRandom then I go ahead and add the line item to the cart and I set header20 to the current rn value> >[/hideif] > >[/showif]Does that make better sense?-- Sam LewisSamLewis.com Tel: 626-852-0956 Fax: 916-404-5698------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
Sam Lewis
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