POST請求的forHTTPHeaderField

本文轉載自查看原文 2014-06-12 17:33 14049 網絡/ 重要/ iOS

也許你的iOS項目中使用了AFNetworking2.0,或者是ASIHTTPRequest,對於http中POST請求的操作,你用了他們提供的現成的方法后,就再也無法理解這些請求是如何實現的了,這對於我們學習網絡請求的原理是很不方便的說,因為不理解原理,那對於定制自己的網絡類也就無從說起,無論AFNetworking2.0與ASIHTTPRequest多么好用,你用的再多也無法讓你真正熟悉網絡庫從而寫出適合自己的網絡封裝.

在開始這篇教程之前,先提供本人粗略封裝的網絡類供看官使用:

NETWorkRequest.h + NETWorkRequest.m

//
//  NETWorkRequest.h
//  NETWork
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import <Foundation/Foundation.h>

// block的相關定義
typedef void (^NETWorkRequestBlock)(NSMutableURLRequest *request);


@interface NETWorkRequest : NSObject

@property (nonatomic, strong, readonly) NSMutableURLRequest *request;

- (void)configRequest:(NETWorkRequestBlock)block;

@end

//
//  NETWorkRequest.m
//  NETWork
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "NETWorkRequest.h"

@interface NETWorkRequest ()

@end

@implementation NETWorkRequest

- (instancetype)init
{
    self = [super init];
    if (self)
    {
        _request = [NSMutableURLRequest new];
    }
    return self;
}

- (void)configRequest:(NETWorkRequestBlock)block
{
    block(self.request);
}

@end

NETWorkConnection.h + NETWorkConnection.m

//
//  NETWorkConnection.h
//  NETWork
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import <Foundation/Foundation.h>
@class NETWorkRequest;

// block的相關定義
typedef void (^NETWorkConnectionBlock)(NSDictionary *info, NSData *data, NSError *error);

@interface NETWorkConnection : NSObject

@property (nonatomic, strong, readonly) NETWorkRequest  *request;

- (instancetype)initWithRequest:(NETWorkRequest *)request;
- (void)resultBlock:(NETWorkConnectionBlock)block;
- (void)start;

@end

//
//  NETWorkConnection.m
//  NETWork
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "NETWorkConnection.h"
#import "NETWorkRequest.h"

@interface NETWorkConnection ()<NSURLConnectionDelegate, NSURLConnectionDataDelegate>

@property (nonatomic, copy)   NETWorkConnectionBlock  onncetionBlock;   // 網絡連接用block
@property (nonatomic, assign) unsigned long long      expectedLength;   // 從服務器獲取期望文件的大小

@property (nonatomic, strong) NSURLConnection        *conncetion;       // 網絡連接
@property (nonatomic, strong) NSMutableData          *cacheData;        // 用於緩存的data數據
@property (nonatomic, strong) NSURLResponse          *response;         // 回復
@property (nonatomic, strong) NSMutableDictionary    *info;             // 一些鏈接的信息

@end

@implementation NETWorkConnection

- (instancetype)initWithRequest:(NETWorkRequest *)request
{
    self = [super init];
    if (self)
    {
        // 開始創建連接
        _conncetion = \
        [[NSURLConnection alloc] initWithRequest:request.request
                                        delegate:self
                                startImmediately:NO];
        
        // 創建數據容器
        _cacheData = [NSMutableData data];
        
        // 儲存一些信息
        _info = [NSMutableDictionary new];
    }
    return self;
}

- (void)start
{
    [self.conncetion start];
}

#pragma mark - delegate
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    // 存儲一些網絡回復的信息
    [_info setObject:@(response.expectedContentLength) forKey:@"expectedContentLength"];
    if (response.suggestedFilename)
        [_info setObject:response.suggestedFilename forKey:@"suggestedFilename"];
    if (response.MIMEType)
        [_info setObject:response.MIMEType          forKey:@"MIMEType"];
    if (response.textEncodingName)
        [_info setObject:response.textEncodingName  forKey:@"textEncodingName"];
    if (response.URL.description)
        [_info setObject:response.URL.description   forKey:@"URL"];
    
    // 走HTTP協議的網絡鏈接會執行括號類的方法
    if([response isKindOfClass:[NSHTTPURLResponse class]])
    {
        NSHTTPURLResponse *r = (NSHTTPURLResponse *)response;
        
        // 獲取response
        _response = response;
        
        [_info setObject:r.allHeaderFields forKey:@"allHeaderFields"];
        [_info setObject:@(r.statusCode)   forKey:@"statusCode"];
        
        // 如果能獲取到期望的數據長度就執行括號中的方法
        if ([r expectedContentLength] != NSURLResponseUnknownLength)
        {
            // 獲取期望下載的數值
            _expectedLength  = [r expectedContentLength];
        }
    }
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData
{    
    // 存儲緩存數據
    [_cacheData appendData:theData];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // 如果存在block則執行
    if (_onncetionBlock)
    {
        // 調用block
        _onncetionBlock(_info, _cacheData, nil);
    }
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    // 如果存在block則執行
    if (_onncetionBlock)
    {
        // 調用block
        _onncetionBlock(_info, nil, error);
    }
}

- (void)resultBlock:(NETWorkConnectionBlock)block
{
    // 防止循環引用
    __weak NSMutableDictionary *infoDic = _info;
    
    // 初始化block
    _onncetionBlock = ^(NSDictionary *info, NSData *data, NSError *error)
    {
        // 調用block
        block(infoDic, data, error);
    };
}

- (void)dealloc
{
    /* After this method is called, the connection’s delegate no longer 
     receives any messages for the connection. If you want to reattempt 
     the connection, you should create a new connection object. */
    [_conncetion cancel];
}

@end

Response Headers(從服務器得到的回復的頭)

Field name	Description	Example	Status
Access-Control-Allow-Origin	Specifying which web sites can participate in cross-origin resource sharing	`Access-Control-Allow-Origin: *`	Provisional
Accept-Ranges	What partial content range types this server supports	`Accept-Ranges: bytes`	Permanent
Age	The age the object has been in a proxy cache in seconds	`Age: 12`	Permanent
Allow	Valid actions for a specified resource. To be used for a 405 Method not allowed	`Allow: GET, HEAD`	Permanent
Cache-Control	Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds	`Cache-Control: max-age=3600`	Permanent
Connection	Options that are desired for the connection^[22]	`Connection: close`	Permanent
Content-Encoding	The type of encoding used on the data. See HTTP compression.	`Content-Encoding: gzip`	Permanent
Content-Language	The language the content is in	`Content-Language: da`	Permanent
Content-Length	The length of the response body in octets (8-bit bytes)	`Content-Length: 348`	Permanent
Content-Location	An alternate location for the returned data	`Content-Location: /index.htm`	Permanent
Content-MD5	A Base64-encoded binary MD5 sum of the content of the response	`Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ==`	Permanent
Content-Disposition^[23]^[24]^[25]	An opportunity to raise a "File Download" dialogue box for a known MIME type with binary format or suggest a filename for dynamic content. Quotes are necessary with special characters.	`Content-Disposition: attachment; filename="fname.ext"`	Permanent
Content-Range	Where in a full body message this partial message belongs	`Content-Range: bytes 21010-47021/47022`	Permanent
Content-Type	The MIME type of this content	`Content-Type: text/html; charset=utf-8`	Permanent
Date	The date and time that the message was sent (in "HTTP-date" format as defined by RFC 2616)	`Date: Tue, 15 Nov 1994 08:12:31 GMT`	Permanent
ETag	An identifier for a specific version of a resource, often a message digest	`ETag: "737060cd8c284d8af7ad3082f209582d"`	Permanent
Expires	Gives the date/time after which the response is considered stale	`Expires: Thu, 01 Dec 1994 16:00:00 GMT`	Permanent: standard
Last-Modified	The last modified date for the requested object (in "HTTP-date" format as defined by RFC 2616)	`Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT`	Permanent
Link	Used to express a typed relationship with another resource, where the relation type is defined by RFC 5988	`Link: </feed>; rel="alternate"`^[26]	Permanent
Location	Used in redirection, or when a new resource has been created.	`Location: http://www.w3.org/pub/WWW/People.html`	Permanent
P3P	This header is supposed to set P3P policy, in the form of `P3P:CP="your_compact_policy"`. However, P3P did not take off,^[27] most browsers have never fully implemented it, a lot of websites set this header with fake policy text, that was enough to fool browsers the existence of P3P policy and grant permissions for third party cookies.	`P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info."`	Permanent
Pragma	Implementation-specific headers that may have various effects anywhere along the request-response chain.	`Pragma: no-cache`	Permanent
Proxy-Authenticate	Request authentication to access the proxy.	`Proxy-Authenticate: Basic`	Permanent
Refresh	Used in redirection, or when a new resource has been created. This refresh redirects after 5 seconds.	`Refresh: 5; url=http://www.w3.org/pub/WWW/People.html`	Proprietary/non-standard: a header extension introduced by Netscape and supported by most web browsers.
Retry-After	If an entity is temporarily unavailable, this instructs the client to try again later. Value could be a specified period of time (in seconds) or a HTTP-date.^[28]	Example 1: `Retry-After: 120` Example 2: `Retry-After: Fri, 07 Nov 2014 23:59:59 GMT`	Permanent
Server	A name for the server	`Server: Apache/2.4.1 (Unix)`	Permanent
Set-Cookie	An HTTP cookie	`Set-Cookie: UserID=JohnDoe; Max-Age=3600; Version=1`	Permanent: standard
Status	The HTTP status of the response	`Status: 200 OK`	? "Status" is not listed as a registered header. The "Status-Line" of a "Response" is defined by RFC2616^[29] without any explicit "Status:" header name.
Strict-Transport-Security	A HSTS Policy informing the HTTP client how long to cache the HTTPS only policy and whether this applies to subdomains.	`Strict-Transport-Security: max-age=16070400; includeSubDomains`	Permanent: standard
Trailer	The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer-coding.	`Trailer: Max-Forwards`	Permanent
Transfer-Encoding	The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked, compress, deflate, gzip, identity.	`Transfer-Encoding: chunked`	Permanent
Upgrade	Ask the client to upgrade to another protocol.	`Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11`	Permanent
Vary	Tells downstream proxies how to match future request headers to decide whether the cached response can be used rather than requesting a fresh one from the origin server.	`Vary: *`	Permanent
Via	Informs the client of proxies through which the response was sent.	`Via: 1.0 fred, 1.1 example.com (Apache/1.1)`	Permanent
Warning	A general warning about possible problems with the entity body.	`Warning: 199 Miscellaneous warning`	Permanent
WWW-Authenticate	Indicates the authentication scheme that should be used to access the requested entity.	`WWW-Authenticate: Basic`	Permanent
X-Frame-Options^[30]	Clickjacking protection: "deny" - no rendering within a frame, "sameorigin" - no rendering if origin mismatch	`X-Frame-Options: deny`	Permanent

Common non-standard response headers(從服務器得到的非標准回復的頭)

Field name	Description	Example
Public-Key-Pins^[31]	Man-in-the-middle attack mitigation, announces hash of website's authentic TLS certificate	`Public-Key-Pins: max-age=2592000; pin-sha256="E9CZ9INDbd+2eRQozYqqbQ2yXLVKB9+xcprMF+44U1g=";`
X-XSS-Protection^[32]	Cross-site scripting (XSS) filter	`X-XSS-Protection: 1; mode=block`
Content-Security-Policy, X-Content-Security-Policy, X-WebKit-CSP^[33]	Content Security Policy definition.	`X-WebKit-CSP: default-src 'self'`
X-Content-Type-Options^[34]	The only defined value, "nosniff", prevents Internet Explorer from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome, when downloading extensions.^[35]	`X-Content-Type-Options: nosniff`
X-Powered-By^[36]	specifies the technology (e.g. ASP.NET, PHP, JBoss) supporting the web application (version details are often in `X-Runtime`, `X-Version`, or `X-AspNet-Version`)	`X-Powered-By: PHP/5.4.0`
X-UA-Compatible^[37]	Recommends the preferred rendering engine (often a backward-compatibility mode) to use to display the content. Also used to activate Chrome Frame in Internet Explorer.	`X-UA-Compatible: IE=EmulateIE7` `X-UA-Compatible: IE=edge` `X-UA-Compatible: Chrome=1`

請寫以下代碼:

打印信息:

2014-06-12 17:15:33.731 NETWork[10975:60b] {
    MIMEType = "application/json";
    URL = "http://www.duitang.com/album/1733789/masn/p/0/1/";
    allHeaderFields =     {
        Connection = "keep-alive";
        "Content-Type" = "application/json;charset=UTF-8";
        Date = "Thu, 12 Jun 2014 09:15:33 GMT";
        Server = nginx;
        "Transfer-Encoding" = Identity;
        "X-Powered-By" = Japa;
    };
    expectedContentLength = "-1";
    statusCode = 200;
    suggestedFilename = 1;
    textEncodingName = "utf-8";
}

對照紅色字體,仔細查一查上面的表,都出現了這些參數哦.

上面的打印信息,是你對服務器請求之后,服務器Response給你的一個allHeaderFields信息,可以了解到服務器的一些狀態值.

其實,我們給服務器發送POST請求的時候,有時候需要自己組織allHeaderFields信息,比如最常見的Content-Length.

request也有着一個Header Fields的列表:

Request Headers(標准請求頭)

Header field name	Description	Example	Status
Accept	Content-Types that are acceptable for the response	`Accept: text/plain`	Permanent
Accept-Charset	Character sets that are acceptable	`Accept-Charset: utf-8`	Permanent
Accept-Datetime	Acceptable version in time	`Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT`	Provisional
Accept-Encoding	List of acceptable encodings. See HTTP compression.	`Accept-Encoding: gzip, deflate`	Permanent
Accept-Language	List of acceptable human languages for response	`Accept-Language: en-US`	Permanent
Authorization	Authentication credentials for HTTP authentication	`Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==`	Permanent
Cache-Control	Used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain	`Cache-Control: no-cache`	Permanent
Connection	What type of connection the user-agent would prefer	`Connection: keep-alive`	Permanent
Content-Length	The length of the request body in octets (8-bit bytes)	`Content-Length: 348`	Permanent
Content-MD5	A Base64-encoded binary MD5 sum of the content of the request body	`Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ==`	Permanent
Content-Type	The MIME type of the body of the request (used with POST and PUT requests)	`Content-Type: application/x-www-form-urlencoded`	Permanent
Cookie	an HTTP cookie previously sent by the server with `Set-Cookie` (below)	`Cookie: $Version=1; Skin=new;`	Permanent: standard
Date	The date and time that the message was sent (in "HTTP-date" format as defined by RFC 2616)	`Date: Tue, 15 Nov 1994 08:12:31 GMT`	Permanent
Expect	Indicates that particular server behaviors are required by the client	`Expect: 100-continue`	Permanent
From	The email address of the user making the request	`From: user@example.com`	Permanent
Host	The domain name of the server (for virtual hosting), and the TCP port number on which the server is listening. The port number may be omitted if the port is the standard port for the service requested.^[8] Mandatory since HTTP/1.1. Although domain name are specified as case-insensitive,^[9]^[10] it is not specified whether the contents of the Host field should be interpreted in a case-insensitive manner^[11] and in practice some implementations of virtual hosting interpret the contents of the Host field in a case-sensitive manner.^{[citation needed]}	`Host: en.wikipedia.org:80` `Host: en.wikipedia.org`	Permanent
If-Match	Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like PUT to only update a resource if it has not been modified since the user last updated it.	`If-Match: "737060cd8c284d8af7ad3082f209582d"`	Permanent
If-Modified-Since	Allows a 304 Not Modified to be returned if content is unchanged	`If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT`	Permanent
If-None-Match	Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag	`If-None-Match: "737060cd8c284d8af7ad3082f209582d"`	Permanent
If-Range	If the entity is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity	`If-Range: "737060cd8c284d8af7ad3082f209582d"`	Permanent
If-Unmodified-Since	Only send the response if the entity has not been modified since a specific time.	`If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT`	Permanent
Max-Forwards	Limit the number of times the message can be forwarded through proxies or gateways.	`Max-Forwards: 10`	Permanent
Origin	Initiates a request for cross-origin resource sharing (asks server for an 'Access-Control-Allow-Origin' response header) .	`Origin: http://www.example-social-network.com`	Permanent: standard
Pragma	Implementation-specific headers that may have various effects anywhere along the request-response chain.	`Pragma: no-cache`	Permanent
Proxy-Authorization	Authorization credentials for connecting to a proxy.	`Proxy-Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==`	Permanent
Range	Request only part of an entity. Bytes are numbered from 0.	`Range: bytes=500-999`	Permanent
Referer [sic]	This is the address of the previous web page from which a link to the currently requested page was followed. (The word “referrer” has been misspelled in the RFC as well as in most implementations to the point that it has become standard usage and is considered correct terminology)	`Referer: http://en.wikipedia.org/wiki/Main_Page`	Permanent
TE	The transfer encodings the user agent is willing to accept: the same values as for the response header Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked" transfer method) to notify the server it expects to receive additional headers (the trailers) after the last, zero-sized, chunk.	`TE: trailers, deflate`	Permanent
Upgrade	Ask the server to upgrade to another protocol.	`Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11`	Permanent
User-Agent	The user agent string of the user agent	`User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/21.0`	Permanent
Via	Informs the server of proxies through which the request was sent.	`Via: 1.0 fred, 1.1 example.com (Apache/1.1)`	Permanent
Warning	A general warning about possible problems with the entity body.	`Warning: 199 Miscellaneous warning`	Permanent

Common non-standard request headers(非標准請求頭)

Field name	Description	Example
X-Requested-With	mainly used to identify Ajax requests. Most JavaScript frameworks send this header with value of `XMLHttpRequest`	`X-Requested-With: XMLHttpRequest`
DNT^[12]	Requests a web application to disable their tracking of a user. This is Mozilla's version of the X-Do-Not-Track header (since Firefox 4.0 Beta 11). Safari and IE9 also have support for this header.^[13] On March 7, 2011, a draft proposal was submitted to IETF.^[14] The W3C Tracking Protection Working Group is producing a specification.^[15]	`DNT: 1 (Do Not Track Enabled)` `DNT: 0 (Do Not Track Disabled)`
X-Forwarded-For^[16]	a de facto standard for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer	`X-Forwarded-For: client1, proxy1, proxy2` `X-Forwarded-For: 129.78.138.66, 129.78.64.103`
X-Forwarded-Proto^[17]	a de facto standard for identifying the originating protocol of an HTTP request, since a reverse proxy (load balancer) may communicate with a web server using HTTP even if the request to the reverse proxy is HTTPS	`X-Forwarded-Proto: https`
Front-End-Https^[18]	Non-standard header used by Microsoft applications and load-balancers	`Front-End-Https: on`
X-ATT-DeviceId^[19]	Allows easier parsing of the MakeModel/Firmware that is usually found in the User-Agent String of AT&T Devices	`X-Att-Deviceid: GT-P7320/P7320XXLPG`
X-Wap-Profile^[20]	Links to an XML file on the Internet with a full description and details about the device currently connecting. In the example to the right is an XML file for an AT&T Samsung Galaxy S2.	`x-wap-profile: http://wap.samsungmobile.com/uaprof/SGH-I777.xml`
Proxy-Connection^[21]	Implemented as a misunderstanding of the HTTP specifications. Common because of mistakes in implementations of early HTTP versions. Has exactly the same functionality as standard Connection header.	`Proxy-Connection: keep-alive`

#define NUM_STRING(num)  [NSString stringWithFormat:@"%lu", (num)]

/**
 執行一個java腳本獲取User-Agent字符串
 
 @return User-Agent字符串
 */
NS_INLINE NSString* UserAgent()
{
    UIWebView* webView = [[UIWebView alloc] initWithFrame:CGRectZero];
    NSString *userAgentString = [webView stringByEvaluatingJavaScriptFromString:
                                 @"navigator.userAgent"];
    
    return userAgentString;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 創建鏈接
    /* ============================================================================== */
    NETWorkRequest *request = [NETWorkRequest new];
    [request configRequest:^(NSMutableURLRequest *request)
     {
         // 配置網址鏈接
         request.URL = [NSURL URLWithString:@"http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx/getMobileCodeInfo"];
         
         // 配置請求類型
         request.HTTPMethod = @"POST";
         
         // 配置請求報文
         NSString *dataString = @"mobileCode=15910514636&userID=";
         
         [request setValue:UserAgent()
        forHTTPHeaderField:@"User-Agent"];
         
         [request setValue:@"application/x-www-form-urlencoded"
        forHTTPHeaderField:@"Content-Type"];
         
         [request setValue:NUM_STRING([dataString toUTF8Data].length)
        forHTTPHeaderField:@"Content-Length"];
         
         // 配置包體
         request.HTTPBody = [dataString toUTF8Data];
         
         // 設置時間間隔
         request.timeoutInterval = 1.f;
         
         // 設置緩存策略
         request.cachePolicy = NSURLRequestUseProtocolCachePolicy;
     }];
    
    // 創建請求
    /* ============================================================================== */
    NETWorkConnection *connection = [[NETWorkConnection alloc] initWithRequest:request];
    [connection resultBlock:^(NSDictionary *info, NSData *data, NSError *error) {
        
        ONOXMLDocument *document = [ONOXMLDocument XMLDocumentWithData:data
                                                                 error:nil];
        NSLog(@"%@", document);

    }];
    
    // 開始請求
    /* ============================================================================== */
    [connection start];
}

一個POST請求由頭和包體所組成,頭就是上面列表中出現的那些參數,Body部分才是你需要傳遞的一些參數.

執行結果如下:

2014-06-12 17:29:52.137 NETWork[11061:60b] <string xmlns="http://WebXml.com.cn/">15910514636：北京北京北京移動全球通卡</string>

總結:

如果網絡請求走HTTP協議的話,其實很容易.GET請求非常簡單,不贅述,POST就是設置Headr Field以及Body的干活,也很簡單,當你理解了這些后,封裝一個自己的網絡請求類真的超級簡單哦.

附錄:

正規攜帶參數的POST請求如下所示

    // 配置
    NETWorkRequest *request = [[NETWorkRequest alloc] init];
    [request configRequest:^(NSMutableURLRequest *request) {
        
        // 網址
        NSString *urlString = @"http://trainddtestapi.tidoo.cn/acts/findLikeActAndCourseList.do";
        
        // 參數
        NSString *params    = @"appkey=peixunduoduo&citycode=100000&lat=39.909875&lng=116.502042&sign=f3f4491cc0ac8caccf0544df9e68baab&timestamp=1404444014&userid=101";
        
        request.HTTPMethod  = @"POST";
        request.HTTPBody    = [params dataUsingEncoding:NSUTF8StringEncoding];
        request.URL         = [NSURL URLWithString:urlString];
        
        
    }];
    
    // 請求
    NETWorkConnection *connection = [[NETWorkConnection alloc] initWithRequest:request];
    [connection infoBlock:^(NSDictionary *info) {
        NSLog(@"%@", info);
    } progressBlock:^(long long currentBytes, long long totalBytes) {
    } resultBlock:^(NSDictionary *info, NSData *data, NSError *error) {
        NSString *result = [[NSString alloc] initWithData:data
                                                 encoding:NSUTF8StringEncoding];
        NSLog(@"%@", result);
    }];
    [connection start];

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