Databases
StackOverflow2013
Postsdbo
POHow to keep a connection alive using ASIHTTP? I need to make multiple requests, but can't afford to open, then close a request connection
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to keep a connection alive using ASIHTTP? I need to make multiple requests, but can't afford to open, then close a request connection
    primarykey
    data
    text
    <p>I have a method that I call to make web service requests using GET. It looks like this:</p> <pre><code>- (UIImage*)getImageWithSeriesGUID:(NSString*)seriesGUID ImageID:(int)imageID { NSString * unescapedString = RIVERWOODS_GET_IMAGE(seriesGUID, imageID); NSURL *url = [[NSURL alloc] initWithString:[unescapedString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setRequestMethod:@"GET"]; [request addRequestHeader:@"Connection" value:@"Keep-Alive"]; [request startSynchronous]; NSError *error = [request error]; if (!error) { NSData *response = [request responseData]; //NSLog(@"Size: %@",[response length]); NSString *content = [[[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding] autorelease]; NSLog(@"Data: %@", content); UIImage *image = [UIImage imageWithData:response]; return image; } return nil; } </code></pre> <p>This approach works ok, but it is just REALLY slowly. On the other end I am iterating through a for loop so this method gets called 20 times if the picture array I need to collect has 20 images. I am looking to improve the efficiency of this process, and I am thinking that I should be able to iterate through all the image Id's I need to collect right here in this method.</p> <p>It seems to me that the reason this goes so slowly is because the multiple requests that we keep opening and closing. THe images I am pulling in are on average ~15kb.</p> <p><strong>My question:</strong> What can I do to change this method around to make it so I can improve efficiency and take advantage of the HTTP keep-alive features? I am thinking that instead of passing in an image ID, I can just pass in the count of the array I need to make, and then setup a for-loop of some sorts here in the request method which would then allow me to pass back an array of images...</p> <p>Is that the way to go? Is there something I am missing? I appreciate your help and input!!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USStephen J.
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to keep a connection alive using ASIHTTP? I need to make multiple requests, but can't afford to open, then close a request connection
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to keep a connection alive using ASIHTTP? I need to make multiple requests, but can't afford to open, then close a request connection
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload