緣起

今天用暴風(fēng)影音看視頻，然后發(fā)現(xiàn)它有個(gè)功能，wifi傳片，感覺挺有意思，然后就上網(wǎng)查了下相關(guān)內(nèi)容。

原理

使用CocoaHTTPServer框架，在iOS端建立一個(gè)本地服務(wù)器，只要電腦和手機(jī)連入同一熱點(diǎn)或者說網(wǎng)絡(luò)，就可以實(shí)現(xiàn)通過電腦瀏覽器訪問iOS服務(wù)器的頁面，利用POST實(shí)現(xiàn)文件的上傳。

實(shí)現(xiàn)

1.下載CocoaHTTPServer

2.導(dǎo)入CocoaHTTPServer-master目錄下的Core文件夾

3.導(dǎo)入Samples/SimpleFileUploadServer目錄下的MyHTTPConnection類文件和web文件夾

導(dǎo)入web文件夾的時(shí)候，一定要使用真實(shí)的目錄，而不是xcode的虛擬目錄

web文件夾導(dǎo)入.png

4.導(dǎo)入Vendor目錄下的CocoaAsyncSocket、CocoaLumberjack文件夾

5.打開MyHTTPConnection.m文件，根據(jù)標(biāo)記 #pragma mark multipart form data parser delegate 跳轉(zhuǎn)或者直接找到139行的 *- (void) processStartOfPartWithHeader:(MultipartMessageHeader ) header 方法，把第151行的uploadDirPath改為

NSString *uploadDirPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];

這個(gè)路徑是上傳文件的存儲(chǔ)路徑

6.在適當(dāng)?shù)牡胤脚渲胹erver啟動(dòng)。這里以AppDelegate為例

#import "AppDelegate.h"
#import <ifaddrs.h>
#import <arpa/inet.h>
#import "HTTPServer.h"
#import "DDLog.h"
#import "DDTTYLogger.h"
#import "MyHTTPConnection.h"

@interface AppDelegate ()
@property (nonatomic, strong) HTTPServer * httpServer;
@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    _httpServer = [[HTTPServer alloc] init];
    [_httpServer setPort:1234];
    [_httpServer setType:@"_http._tcp."];
    // webPath是server搜尋HTML等文件的路徑
    NSString * webPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"web"];
    [_httpServer setDocumentRoot:webPath];
    [_httpServer setConnectionClass:[MyHTTPConnection class]];
    NSError *err;
    if ([_httpServer start:&err]) {
        NSLog(@"port %hu",[_httpServer listeningPort]);
    }else{
        NSLog(@"%@",err);
    }
    NSString *ipStr = [self getIpAddresses];
    NSLog(@"ip地址 %@", ipStr);
    
    return YES;
}

- (NSString *)getIpAddresses{
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    // retrieve the current interfaces - returns 0 on success
    success = getifaddrs(&interfaces);
    if (success == 0)
    {
        // Loop through linked list of interfaces
        temp_addr = interfaces;
        while(temp_addr != NULL)
        {
            if(temp_addr->ifa_addr->sa_family == AF_INET)
            {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"])
                {
                    // Get NSString from C String
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    // Free memory
    freeifaddrs(interfaces);
    return address;
}

7.運(yùn)行后，控制臺(tái)會(huì)打印出端口號(hào)和ip，在電腦端瀏覽器里輸入ip+端口號(hào)訪問即可，如果成功的話會(huì)看到如下界面：

訪問成功.png

8.如果上傳成功，網(wǎng)頁上會(huì)出現(xiàn)上傳的文件名，可以在沙盒里驗(yàn)證文件是否上傳成功