利用CocoaHttpServer搭建手机本地服务器

缘起

今天用暴风影音看视频，然后发现它有个功能，wifi传片，感觉挺有意思，然后就上网查了下相关内容。

原理

使用CocoaHTTPServer框架，在iOS端建立一个本地服务器，只要电脑和手机连入同一热点或者说网络，就可以实现通过电脑浏览器访问iOS服务器的页面，利用POST实现文件的上传。

实现

1.下载CocoaHTTPServer

2.导入CocoaHTTPServer-master目录下的Core文件夹

3.导入Samples/SimpleFileUploadServer目录下的MyHTTPConnection类文件和web文件夹

导入web文件夹的时候，一定要使用真实的目录，而不是xcode的虚拟目录

4.导入Vendor目录下的CocoaAsyncSocket、CocoaLumberjack文件夹

5.打开MyHTTPConnection.m文件，根据标记 #pragma mark multipart form data parser delegate 跳转或者直接找到139行的 - (void) processStartOfPartWithHeader:(MultipartMessageHeader *) header 方法，把第151行的uploadDirPath改为

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

这个路径是上传文件的存储路径

6.在适当的地方配置server启动。这里以AppDelegate为例

#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搜寻HTML等文件的路径
    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;
}