WiFi傳書(shū)

1叶洞、iPhone傳輸文件的幾種方式

1. 通過(guò)itunes傳輸文件到documents
2. 通過(guò)蘋(píng)果iOS11文件APP->更多->打開(kāi)
3. 客戶(hù)端自定義協(xié)議下載（百度閱讀先將文件上傳到服務(wù)器田篇，再下載）
4. WiFi傳書(shū)

2、WiFi傳書(shū)的原理

• 將手機(jī)作為服務(wù)器兴革，在同一網(wǎng)絡(luò)下绎晃，可以用過(guò)瀏覽器訪(fǎng)問(wèn)到服務(wù)器，上傳文件后杂曲，服務(wù)器（即手機(jī)）將文件存儲(chǔ)到沙盒內(nèi)

3庶艾、技術(shù)選型

• CocoaHTTPServer 是面向Mac OS X和iOS app的輕量級(jí)、可嵌入的HTTP服務(wù)器框架擎勘。
• CocoaHTTPServer是由deusty designs開(kāi)源的一個(gè)項(xiàng)目咱揍，支持異步socket，ipv4和ipv6棚饵，http Authentication和TLS加密
• 瀏覽器上傳本地書(shū)籍煤裙，使用ajax + html上傳文件，表單上傳的方式

4噪漾、HTTPSERVER 技術(shù)要點(diǎn)

1硼砰、初始化HTTPServer,設(shè)置web路徑,需要提供web文件

- (void)setServer {
    self.httpServer = [[HTTPServer alloc] init];//初始化
    [self.httpServer setType:@"_http._tcp."];//通過(guò)Bonjour服務(wù)發(fā)布的類(lèi)型,允許瀏覽器訪(fǎng)問(wèn)
    [self.httpServer setPort:8080];//設(shè)置端口
    [self.httpServer setConnectionClass:[MyHTTPConnection class]];//設(shè)置處理連接的自定義類(lèi)文件
    NSString *webPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Web"];
    DDLogInfo(@"Setting document root: %@", webPath);
    [self.httpServer setDocumentRoot:webPath];//設(shè)置服務(wù)器根目錄
    NSLog(@"home = %@",NSHomeDirectory());
}

2、 設(shè)置支持的方法

- (BOOL)supportsMethod:(NSString *)method atPath:(NSString *)path
{
    HTTPLogTrace();
    
    // Add support for POST
    if ([method isEqualToString:@"POST"])
    {
        return YES;
    }
    if ([method isEqualToString:@"DELETE"]) {
        return YES;
    }
    if ([method isEqualToString:@"GET"]) {
        return YES;
    }
    return [super supportsMethod:method atPath:path];
}

2欣硼、 處理請(qǐng)求

- (NSObject<HTTPResponse> *)httpResponseForMethod:(NSString *)method URI:(NSString *)path
{
    HTTPLogTrace();
    
    if ([method isEqualToString:@"POST"] && [path isEqualToString:@"/upload.html"])
    {

        // this method will generate response with links to uploaded file
        NSMutableString* filesStr = [[NSMutableString alloc] init];

        for( NSString* filePath in uploadedFiles ) {
            //generate links
            [filesStr appendFormat:@"<a href=\"%@\"> %@ </a><br/>",filePath, [filePath lastPathComponent]];
        }
        NSString* templatePath = [[config documentRoot] stringByAppendingPathComponent:@"upload.html"];
        NSDictionary* replacementDict = [NSDictionary dictionaryWithObject:filesStr forKey:@"MyFiles"];
        // use dynamic file response to apply our links to response template
        return [[HTTPDynamicFileResponse alloc] initWithFilePath:templatePath forConnection:self separator:@"%" replacementDictionary:replacementDict];
    }
    if( [method isEqualToString:@"GET"] && [path hasPrefix:@"/upload/"] ) {
        // let download the uploaded files
        return [[HTTPFileResponse alloc] initWithFilePath: [[config documentRoot] stringByAppendingString:path] forConnection:self];
    }
    
    return [super httpResponseForMethod:method URI:path];
}

3夺刑、 處理文件上傳內(nèi)容

上次有2個(gè)part：一個(gè)是文件名，另一個(gè)是文件內(nèi)容

- (BOOL)expectsRequestBodyFromMethod:(NSString *)method atPath:(NSString *)path
{
    HTTPLogTrace();
    
    // Inform HTTP server that we expect a body to accompany a POST request
    
    if([method isEqualToString:@"POST"] && [path hasPrefix:@"/upload"]) {
        // here we need to make sure, boundary is set in header
        NSString* contentType = [request headerField:@"Content-Type"];
        NSUInteger paramsSeparator = [contentType rangeOfString:@";"].location;
        if( NSNotFound == paramsSeparator ) {
            return NO;
        }
        if( paramsSeparator >= contentType.length - 1 ) {
            return NO;
        }
        NSString* type = [contentType substringToIndex:paramsSeparator];
        if( ![type isEqualToString:@"multipart/form-data"] ) {
            // we expect multipart/form-data content type
            return NO;
        }
        
        // enumerate all params in content-type, and find boundary there
        NSArray* params = [[contentType substringFromIndex:paramsSeparator + 1] componentsSeparatedByString:@";"];
        for( NSString* param in params ) {
            paramsSeparator = [param rangeOfString:@"="].location;
            if( (NSNotFound == paramsSeparator) || paramsSeparator >= param.length - 1 ) {
                continue;
            }
            NSString* paramName = [param substringWithRange:NSMakeRange(1, paramsSeparator-1)];
            NSString* paramValue = [param substringFromIndex:paramsSeparator+1];
            
            if( [paramName isEqualToString: @"boundary"] ) {
                // let's separate the boundary from content-type, to make it more handy to handle
                [request setHeaderField:@"boundary" value:paramValue];
            }
        }
        // check if boundary specified
        if( nil == [request headerField:@"boundary"] )  {
            return NO;
        }
        return YES;
    }
    return [super expectsRequestBodyFromMethod:method atPath:path];
}

4分别、 處理body數(shù)據(jù)

- (void)processBodyData:(NSData *)postDataChunk
{
    HTTPLogTrace();
    // append data to the parser. It will invoke callbacks to let us handle
    // parsed data.
    [request appendData:postDataChunk];//post body存儲(chǔ)
    [parser appendData:postDataChunk];//文件存儲(chǔ)
}