I'm using ASIHTTPRequest with caching for downloading pictures in my iOS app. Most pictures never change and hence can leverage the caching functionality. There are a few that do change based on a certain function in the iOS app. So, I know exactly when these images will change. How can I clear the cache of a certain link (e.g. http://www.test.com/image.jpg) and preserve the cache for all other requests in my app. Thanks.
ASIHTTPRequest *request;
request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:#"{Image url}"]];
[request setDownloadCache:[ASIDownloadCache sharedCache]];
[request setCachePolicy:ASIAskServerIfModifiedWhenStaleCachePolicy|ASIFallbackToCacheIfLoadFailsCachePolicy];
[request setCacheStoragePolicy:ASICachePermanentlyCacheStoragePolicy];
[request setSecondsToCache:60*60*24*7];
[[ASIDownloadCache sharedCache] removeCachedDataForURL:[NSURL URLWithString:#"{Image url}"]];
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I am using ASIHttpRequest and make use GET method to send header to server. I call method addRequestHeader like this
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request addRequestHeader:#"myHeader" value:#"abc"];
It's not working. But if I use NSMutableURLRequest to add header and request to server, it works.
I don't know anything wrong when calling addRequestHeader methods for ASIHTTPRequest library.
Have anyone seen this issue?
Wow ok so, yeah if this is a new app, please do NOT use ASIHttpRequest. It has long been supplanted by the delightful AFNetworking.
If this is an existing application, you really should work on a migration plan off ASI.
However, in an attempt to actually answer your question - that is the appropriate setup per the documentation, and is how I used to use it. My guess is something is broken under the covers and judging from a basic google request, there are issues with iOS 7 including memory leaks and requests just failing.
You can do it via NSURLRequest
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.abc.com"]];
NSMutableURLRequest *mutableRequest = [request mutableCopy];
[mutableRequest addValue:#"AAA" forHTTPHeaderField:#"Hello-there"];
request = [mutableRequest copy];
NSLog(#"%#", request.allHTTPHeaderFields);
Hope this helps .. :)
I'm using ASIHTTPRequest to access a web based API and need to set a header for App authentication. Note that this is not a server level authentication it is at API level. I've tried every thing I could find and most of the answers on the web as well as the ones here at www.stackoverflow.com tell me to use something like:
[request addRequestHeader:#"username" value:#"asdf"];
This does not work for me. The guy who built the API I'm using told me that I need to set the header as:
Authorization: TRUEREST username=PersonName&password=pass&apikey=dfiu6aewruif3Bismillah4Rah3anArahimiImi22MyDad
So I tried the following:
NSURL *url = [NSURL URLWithString:#"http://ifish-uk.co.uk/rest_users/login.json"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request addRequestHeader:#"username" value:#"MyUser"];
[request addRequestHeader:#"password" value:#"MyPass"];
[request addRequestHeader:#"apikey" value:#"dfiu6aewruif3Bismillah4Rah3anArahimiImi22MyDad"];
But it didn't work... I even tried setting the Request type to GET because the developer told me I should do this:
[request setRequestMethod:#"GET"];
This didn't work... The API developer told me he is made this module as follow:
POST /rest_catches/add.json HTTP/1.1
Host: ifish-uk.co.uk
Authorization: TRUEREST username=MyUser&password=MyPass&apikey=dfiu6aewruif3Bismillah4Rah3anArahimiImi22MyDad
Cache-Control: no-cache
any help would be greatly appreciated.
You should add only one header is Authorization no need to add separate headers for each field (use, pass, etc).
Fill it with your specific values and send.
[request addRequestHeader:#"Authorization" value:#"TRUEREST username=PersonName&password=pass&apikey=dfiu6aewruif3Bismillah4Rah3anArahimiImi22MyDad"];
Did you try adding:
[request setRequestMethod:#"POST"];
?
I need some tutorial, how to use HTTP POST (or GET) request from my iOS app. I want to send one string to my server and than write it to database. I've found this piece of code:
NSString *post = #"key1=val1";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:#"http://www.nowhere.com/sendFormHere.php"]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
I add it to UIAction button, but it don't send anything to my server. On my server, I have a PHP script that takes that "key1" from post and than it write it to db.
<?
$postr = $_POST["key1"];
$con0 = mysql_connect("server","db","pass");
mysql_select_db("table", $con0);
mysql_set_charset('utf8',$con0);
mysql_query("INSERT INTO tok (token) VALUES ('$postr')");
mysql_close();
?>
Can anybody tell me what I am doing wrong?
Look at AFnetworking and work through their api. Sending a post request using the api is very fast, and is what most apps use for web connectivity.
Also please dont be discouraged by sarcastic comments. You should tag iOS projects as iOS and not xcode (unless you actually need help with the actual program xcode). But I don't think it's productive to harrass everyone that comes in and makes this mistake. A more tactful way would be a personal message as opposed to a public retort
https://github.com/AFNetworking/AFNetworking
AFNetworking is a very powerful library that can help you to reduce the effort on create your HTTP requests, you can find several examples on how to use this library on its github page.
You may find this answer useful for your needs: AFNetworking Post Request
A client is pondering development of an iPhone and iPad app and has asked an odd question: Is there any way to send data from an iOS device to a server other than using NSURL?
I think you could try using a POST request
responseData = [[NSMutableData data] retain];
NSMutableURLRequest *request = [NSMutableURLRequest
requestWithURL:[NSURL URLWithString:#"http://www.domain.com/your/servlet"]];
NSString *params = [[NSString alloc] initWithFormat:#"foo=bar&key=value"];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[params dataUsingEncoding:NSUTF8StringEncoding]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
That way the data would go inside the body of the request and not on the URL itself
The NSURL API isn't a way of getting data from a server. It's just a class for storing a URL. I suppose if you really want to avoid NSURL as much as possible, you could store URLs in an NSString, and then use appropriate APIs to convert it into an NSURL right before you use it.
To get data from a server, you would use either the NSURLSession API (modern) or NSURLConnection API (kind of crufty). Either is a fairly straightforward way to fetch data from an HTTP or HTTPS URL.
If you don't want to use either of those URL fetching APIs for some reason, you can write your own code using sockets or grab libcurl (MIT license) and link it into your app. Be aware that if you write your own socket code or use libcurl, assuming you're writing code for iOS, you'll need to occasionally use high-level APIs such as NSURL or CFHost to wake up the cellular radio.
I am using ASIHTTPRequest to work on Facebook graph API.
This is the nearest I have gone to posting a picture on the feed. So if I have a
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
The url is https://graph.facebook.com/me/feed
Now to post a picture I do the following:
[request setPostValue:#"My Message" forKey:#"message"];
[request setPostValue:#"somepic.png" forKey:#"picture"];
[request setPostValue:#"Some Name" forKey:#"name"];
[request setPostValue:#"Some description" forKey:#"description];
[request startAsynchronous];
If you try this then everything works fine other than the picture being posted. A blank placeholder for the picture is though show on the feed.
Just use this small snippet to upload a image on your disk as raw data
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setData:UIImageJPEGRepresentation(img.image, 0.1) withFileName:filename andContentType:#"image/jpeg" forKey:#"photo"];
I found out this documentation on facebook: http://developers.facebook.com/docs/reference/api/post
According to this documentation we can not post an image residing on our machine using the api. Instead we have to upload the pic and then provide the link for posting to the feed.
But uploading an image on to the wall is allowed if you logon to facebook.com. I believe this functionality is not provided in the graph api.
It might be worth taking a look at ShareKit - http://www.getsharekit.com/
Their demo app publishes a photo on the Facebook wall successfully. I believe they wrap the upload-then-publish process in their code.
HTH,
Oded