iOS development uses nsurlconnection, Nsurlsession, AFN, ASI Four ways to implement HTTP requests

Summary: HTTP requests can be implemented using Nsurlconnection, Nsurlsession, AFN, ASI and other methods, including GET, post two request mode and synchronous, asynchronous program execution mode.

Nsurlconnection

1 Get-Mode synchronization requests

/**  *  get sync request  */ -(void) getsynch{     //  get URL     nsurl *url = [[nsurl alloc]  initwithstring:@ "http://localhost:8070/MJServer/login?username=123&password=123"];     //  GET request requests     nsurlrequest *request = [Nsurlrequest requestwithurl:url];               //  send synchronization requests     nsdata *data = [nsurlconnection sendsynchronousrequest:request  Returningresponse:nil error:nil];          //  convert data to string     nsstring *result = [[nsstring alloc] initwithdata:data encoding: Nsutf8stringencoding];          nslog (@ "Data-%@", result); }

2 asynchronous request with Get mode

/** * Get Asynchronous request */ -(void) getasynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video"]; GET request Requests Nsurlrequest *request = [Nsurlrequest Requestwithurl:url]; Send a sync request [Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) { Turn data into a dictionary Nsdictionary *dict = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingallowfragments Error:nil]; NSLog (@ "Data-%@", dict); }]; }

3 post Sync request

/** * Post Sync Request */ -(void) postsynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer"]; Setting up a POST request requires the use of nsmutableurlrequest Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url]; Set the request mode to post (required) Request. HttpMethod = @ "POST"; Send a sync request NSData *data = [nsurlconnection sendsynchronousrequest:request returningresponse:nil Error:nil]; Convert data to String NSString *result = [[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]; NSLog (@ "Data-%@", result); }

4 post Asynchronous request

/** * Post Asynchronous request */ -(void) postasynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/login"]; GET request Requests Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url]; Set the request mode to post Request. HttpMethod = @ "POST"; Set form parameters (optional) NSString *params = [NSString stringwithformat:@ "username=123&pwd=123"]; Request. Httpbody = [params datausingencoding:nsutf8stringencoding]; Set timeout (optional) Request.timeoutinterval = 5; Set Request header information (optional) [Request setvalue:@ "IPhone 6" forhttpheaderfield:@ "User-agent"]; Setting up a POST request requires the use of nsmutableurlrequest [Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) { Turn data into a dictionary Nsdictionary *dict = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingallowfragments Error:nil]; NSLog (@ "Data-%@", dict); }]; }

Nsurlsession

1 GET Request for session

/**  *  session GET request  */ -(void) sessionget{     //  Get a session instance     NSURLSession  *session = [Nsurlsession sharedsession];          //  Get URL     nsurl *url = [[nsurl alloc] initwithstring:@] http://localhost:8070/MJServer/ Video "];     //  Create a data Access task     nsurlsessiondatatask *task = [Session datataskwithurl:url completionhandler : ^ (nsdata *data, nsurlresponse *response, nserror *error) {         nslog (@ "Data--%@", [[nsstring alloc] initwithdata:data encoding:nsutf8stringencoding ]);    }];     //  start tasks, start, reply with resume     [task resume]; }

2 POST request for session

/** * POST request for session */ -(void) sessionpost{ Get a Session instance Nsurlsession *session = [Nsurlsession sharedsession]; Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/login"]; Get the Request requests object Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url]; Set Request mode Request. HttpMethod = @ "POST"; Set the request body, NSString *params = @ "username=123&pwd=123"; Request. Httpbody = [params datausingencoding:nsutf8stringencoding]; Create a data Access task Nsurlsessiondatatask *task = [Session datataskwithrequest:request completionhandler:^ (NSData *data, NSURLResponse * Response, Nserror *error) { NSLog (@ "Data-%@", [[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]); }]; Start Task [Task resume]; }

Afnetwork Framework, need to import #import "AFNetworking.h"

1 Get Request for AFN

#import "AFNetworking.h"

/** * AFN GET request */ -(void) afnget{ Create a Request Operations Manager Afhttprequestoperationmanager *manager = [Afhttprequestoperationmanager manager]; Declaration response results are not parsed in JSON, XML, etc., and return data directly Manager.responseserializer = [Afhttpresponseserializer serializer]; Set request parameters (optional) Nsmutabledictionary *params = [Nsmutabledictionary dictionary]; params[@ "username"] = @ "123"; params[@ "pwd"] = @ "123"; Send a GET request NSString *url = @ "Http://localhost:8070/MJServer/login"; [Manager Get:url Parameters:params success:^ (afhttprequestoperation *operation, id responseobject) { The request was successfully processed here Convert response data into a dictionary Nsdictionary *dict = [Nsjsonserialization jsonobjectwithdata:responseobject options:nsjsonreadingallowfragments Error:nil]; NSLog (@ "%@", dict); } failure:^ (Afhttprequestoperation *operation, Nserror *error) { If the request fails to process here NSLog (@ "request fail"); }]; }

2 AFN POST Request

/** * AFN's POST request */ -(void) afnpost{ Create a Request Operations Manager Afhttprequestoperationmanager *manager = [Afhttprequestoperationmanager manager]; Declaration response results are not parsed in JSON, XML, etc., and return data directly Manager.responseserializer = [Afhttpresponseserializer serializer]; Set request parameters (optional) Nsmutabledictionary *params = [Nsmutabledictionary dictionary]; params[@ "username"] = @ "123"; params[@ "pwd"] = @ "123"; Send a GET request NSString *url = @ "Http://localhost:8070/MJServer/login"; [Manager Post:url Parameters:params success:^ (afhttprequestoperation *operation, id responseobject) { The request was successfully processed here Convert response data into a dictionary Nsdictionary *dict = [Nsjsonserialization jsonobjectwithdata:responseobject options:nsjsonreadingallowfragments Error:nil]; NSLog (@ "%@", dict); } failure:^ (Afhttprequestoperation *operation, Nserror *error) { If the request fails to process here NSLog (@ "request fail"); }]; }

ASI (Note Adding the Libz class Library and modifying the ASI source file to be non-arc)

1 ASI Get sync request

#import "ASIHTTPRequest.h"

/** * ASI's Get sync request */ -(void) asigetsynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video"]; Get ASI Request Object ASIHTTPRequest *request = [ASIHTTPRequest Requestwithurl:url]; Send a sync request [Request startsynchronous]; Nserror *error = [request ERROR]; if (Error) { NSLog (@ "request failed"); }else{ NSString *data = [request responsestring]; NSData *data = [request ResponseData]; Nsdictionary *result = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingallowfragments Error:nil]; NSLog (@ "Result-%@", result); } }

2 Get asynchronous request for ASI

/** * ASI's Get asynchronous request * Note: The ASI monitoring request process is delegate, block and selector three ways, * The test found that delegate and block can be executed simultaneously, selector and block can be executed simultaneously, but delegate and selector coexist (including three coexistence) do not perform delegate * Execution order: Delegate > Selector > block * Data not available through ResponseData and responsestring * You cannot get data directly from ResponseData and responsestring using a proxy */ -(void) asigetasynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video"]; Get ASI Request Object ASIHTTPRequest *request = [ASIHTTPRequest Requestwithurl:url]; Set up the Asihttprequestdelegate agent. Request.delegate = self; Sending an asynchronous request [Request startasynchronous]; Block to set the listening request process [Request setstartedblock:^{ NSLog (@ "block request Start"); }]; [Request setdatareceivedblock:^ (NSData *data) { NSLog (@ "Block gets request data--%@", [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingallowfragments Error: Nil]); }]; [Request setcompletionblock:^{ NSLog (@ "block request End"); }]; Set the selector of the listener request process [Request Setdidstartselector: @selector (start:)]; [Request Setdidreceivedataselector: @selector (receivedata:)]; [Request Setdidfinishselector: @selector (finish:)]; } #pragma mark Selector Monitoring method -(void) Start: (ASIHTTPRequest *) request{ NSLog (@ "selector request start"); } -(void) Receivedata: (ASIHTTPRequest *) request{ The data is not available here NSLog (@ "Selector obtain request data-%@", [request responsestring]); } -(void) Finish: (ASIHTTPRequest *) request{ NSLog (@ "selector request End"); } #pragma mark implements the proxy method for Asihttprequestdelegate -(void) Request: (ASIHTTPRequest *) Request Didreceivedata: (NSData *) data{ NSLog (@ "Delegate GET request data-%@", [Nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingallowfragments Error:nil]); } -(void) requeststarted: (ASIHTTPRequest *) request{ NSLog (@ "Delegate request start"); } -(void) requestfinished: (ASIHTTPRequest *) request{ NSLog (@ "Delegate request End"); } -(void) requestfailed: (ASIHTTPRequest *) request{ NSLog (@ "Delegate request failed"); }

3 ASI Post Asynchronous request

#import "ASIFormDataRequest.h"

/** * ASI Post Asynchronous request */ -(void) asipostasynch{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/login"]; Get ASI Form Request Object Asiformdatarequest *request = [Asiformdatarequest Requestwithurl:url]; Set Request parameters [Request setpostvalue:@ "123" forkey:@ "username"]; [Request setpostvalue:@ "123" forkey:@ "pwd"]; You can't get data directly from ResponseData and responsestring using proxies Request.delegate = self; Sending an asynchronous request [Request startasynchronous]; Set the listener (only the Block method is shown here) __weak asiformdatarequest *req = Request; [Request setcompletionblock:^{ NSLog (@ "selector GET request data-%@", [req responsestring]); }]; }

iOS development uses nsurlconnection, Nsurlsession, AFN, ASI Four ways to implement HTTP requests