如何安排对服务器的每小时请求并将数据存储在我自己的服务器上以从iOS应用访问？

Question

I have very little server side experience. I am wondering what my best option would be for the following situation. There is an API I want to get data from, but there is a limit to how many times I access that data per second, something like less than 10 requests per minute or so, before it gets frozen. What can I use as a server to schedule a request to the API for all the information I need, every hour or so, so that I can then access the data from my server as many times as I want to from my mobile app?

Are there tools out there that I can take advantage of?

Answer 1

Good question, I recently had to learn a bit on the server side for the push notifications i'm trying to implement in a market data (fx) app i'm writing.

The best solution i've found is:

Assuming you're on a Mac,

1. Get MAMP here - it's PHP, MySQL and Apache webserver.

   • best bit about MAMP is it's a self contained app, so it won't mess with your OS X install

2. You can write PHP code to pull the data from the API, store it on your MySQL database you set up with MAMP.

3. You can then write a little objective C code, to hit up your Apache webserver on another PHP file that pulls the data you stored earlier.

That's basically it, now I know what you're thinking, you probably don't know any PHP. Either did I until last weekend and you should see what I'm able to do in it now!

I only knew objective C, but even so learning PHP was very easy - and i'm not the best coder out there.

I have a PHP script that (within about 10 lines of code) goes to a website's API pulls JSON values for FX prices and stores them in my DB. I can then hit up my Webserver and pull the values.

Learning all of this has made me realise that Web applications are incredibly powerful, where before I never considered them when developing iOS apps.

Answer 2

if you want to call your webservice after some time interval continuously then i guess NSTimer is the thing that helps you i have a bit of code that might help you for calling your method of parsing

- (void)viewDidLoad{
    NSTimer *timer = [NSTimer
         scheduledTimerWithTimeInterval:2.0
         target:self
         selector:@selector(methodOfParsing)
         userInfo:nil
         repeats:YES];
}

it will be called after every 2 second so you can manage this by replacing 2.0 by your desired value