I seemed to have solved my own problem. The action of my form was http://chart.apis.google.com/chart as shown in the examples of the Google Charts API. I changed it to this: http://chart.apis.google.com/chart?millis=<millis> where <millis> is the current time stamp in milliseconds. The problem instantly went away.
On Jun 1, 7:59 am, Rob <[email protected]> wrote: > I have two situations: in one situation my URL is under the 2,048 URL > character limit and I can do a normal HTTP GET to retrieve a Google > Chart image. In the other situation my URL is greater than 2,048 > characters so I have to instead display an HTML form and do an HTTP > POST that redirects the resulting Google Chart image to an iframe. All > of this works except for one small issue: when I do the HTTP POST > method, the chart returned is always the same, so either the same > image is being returned or my browser is showing a cached image > instead of showing the new image. How do I force both Google Charts > AND my browser to not show any cached images and instead show a > "fresh" image each time I use the HTTP POST method described above? > > Thanks in advance, > Rob -- You received this message because you are subscribed to the Google Groups "Google Chart API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-chart-api?hl=en.
