ASIHTTPRequest Use understanding

Open Source Library: ASIHTTPRequest

ASIHTTPRequest Download URL: http://github.com/pokeb/asi-http-request

Dependent 5 library files: cfnetwork, systemconfiguration,mobilecoreservices, and Libz, LIBXML2

A class method is used to control the number of executions of a queue, but once a request is sent it is executed immediately and cannot be controlled logically.

[ASIHTTPRequest sharedqueue].maxconcurrentoperationcount = 1;

Initialization of the request queue

Self.queue = [Asinetworkqueue queue];

Number of concurrent executions

Self.queue.maxConcurrentOperationCount = 1;

let the queue go on, create a queue can have we control his logical order of execution

[Self.queue go];

sending an asynchronous request

-(void) Asynchronous: (nsurl *) URL

{

asihttprequest *request = [asihttprequest requestwithurl: url];

[Request Setrequestmethod:@ "GET"];

[Request Settimeoutseconds:];

// send asynchronous request Agent

//request.delegate = self;

Call block when request data is completed

[Request Setcompletionblock: ^{

nsdata *data = Request. ResponseData;

UIImage *image = [UIImage imagewithdata:d ATA];

self. Image = image;

if (request. Didusecachedresponse) {

NSLog(@ " to cache ");

}Else {

NSLog(@ " is coming to the network ");

}

}];

// request data failed call block

[Request Setfailedblock: ^{

NSLog(@ " request data failed ");

}];

//------------------------ set the cache policy -----------

nsstring *cachepath = [nshomedirectory()stringbyappendingpathcomponent:@ " Documents "];

asidownloadcache *cache = [[asidownloadcache alloc] init];

[Cache Setstoragepath: CachePath];

Cache. defaultcachepolicy = asionlyloadifnotcachedcachepolicy;

// This will erase the last storage at the time of each painting

Request. cachestoragepolicy = asicacheforsessiondurationcachestoragepolicy;

// Create a persistent cache here and call it directly from memory each time you want to call

//request.cachestoragepolicy = asicachepermanentlycachestoragepolicy;

//Request.downloadcache = cache;

// start asynchronous request

[Request startasynchronous];

// Add the request to the queue

//Handle to set the Get instance object

Appdelegate *appdelegate = [UIApplication sharedapplication].delegate;

[Appdelegate.queue Addoperation:request];

}

send a sync request

-(void) Synchronous: (nsurl *) URL

{

//ASIHTTPRequest *request = [ASIHTTPRequest requestwithurl:url];

asiformdatarequest *request = [asiformdatarequest requestwithurl: url];

[Request Setrequestmethod:@ "GET"];

[Request Settimeoutseconds:];

// Set the request header

//[request setrequestheaders:<# (nsmutabledictionary *) #>];

// set cookier

//[Request setrequestcookies:<# (Nsmutablearray *) #>];

// send a sync request

[Request startsynchronous];

// receive an error message

nserror *error = Request. Error;

if (Error = = Nil) {

nsdata *data = Request. ResponseData;

UIImage *image = [UIImage imagewithdata:d ATA];

self. Image = image;

}Else{

NSLog(@ " error sending sync request data :%@", error);

}

}

#pragma mark---asynchronous delegate

Completing an asynchronous request

-(void) requestfinished: (ASIHTTPRequest *) request

{

Get Data

NSData *data = Request.responsedata;

UIImage *image = [UIImage imagewithdata:data];

Self.image = image;

}

Asynchronous request failed

-(void) requestfailed: (ASIHTTPRequest *) request

{

Nserror *error = Request.error;

NSLog (@ "Asynchronous request failed:%@", error);

}

Other methods:

ASIHTTPRequest Use understanding