在当今数字化时代,音频数据的获取和处理变得越来越重要。本文将访问网易云音乐为案例,介绍如何使用JDAudioCrawler这个强大的工具,将音频数据存储下载到本地存储中。将详细介绍实现的流程和代码细节。
DAudioCrawler 是一个功能强大的爬取音频工具,它可以帮助我们从指定的 URL 中爬取音频数据。它提供了一系列的方法和属性,使得音频爬取变得简单而高效,在开始之前,需要确保已经安装了JDAudioCrawler,并且具备我们基本的编程知识和理解。
我们的需求是下载的音频存储数据到本地存储中。这样,我们可以在需要的时候随时访问这些文件,从而消耗再次下载。通过使用 JDAudioCrawler。
在开始爬取网易云音乐之前,我们需要先分析页面请求、找到数据来源、分析接口规律、获取接口数据,对数据进行过滤和处理。
// 分析页面请求
NSString *urlString = @"https://music.163.com/api/song/detail";
NSURL *url = [NSURL URLWithString:urlString];
// 构建请求参数
NSDictionary *parameters = @{
@"id": @"123456", // 替换为实际的音乐ID
@"type": @"song"
};
// 构建请求
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:nil];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
// 发送请求
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"请求失败:%@", error.localizedDescription);
return;
}
// 处理响应数据
NSDictionary *responseDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"响应数据:%@", responseDict);
}];
[dataTask resume];
// 设置代理信息
NSString *proxyHost = @"www.16yun.cn";
NSString *proxyPort = @"5445";
NSString *proxyUser = @"16QMSOML";
NSString *proxyPass = @"280651";
// 创建JDAudioCrawler对象
NSURL *targetURL = [NSURL URLWithString:@"https://example.com/api/audio"];
JDAudioCrawler *audioCrawler = [[JDAudioCrawler alloc] initWithTargetURL:targetURL];
// 设置代理信息
audioCrawler.connection.delegate = audioCrawler;
NSDictionary *proxySettings = @{
(NSString *)kCFNetworkProxiesHTTPEnable: @YES,
(NSString *)kCFNetworkProxiesHTTPProxy: proxyHost,
(NSString *)kCFNetworkProxiesHTTPPort: proxyPort,
(NSString *)kCFProxyUsernameKey: proxyUser,
(NSString *)kCFProxyPasswordKey: proxyPass
};
audioCrawler.connection.proxyDictionary = proxySettings;
// 开始爬取数据
[audioCrawler startCrawling];
#import
@interface JDAudioCrawler : NSObject
@property (nonatomic, strong) NSURL *targetURL;
@property (nonatomic, strong) NSURLConnection *connection;
@property (nonatomic, strong) NSMutableData *receivedData;
- (id)initWithTargetURL:(NSURL *)targetURL;
- (void)startCrawling;
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
- (void)connectionDidFinishLoading:(NSURLConnection *)connection;
@end
@implementation JDAudioCrawler
- (id)initWithTargetURL:(NSURL *)targetURL {
self = [super init];
if (self) {
_targetURL = targetURL;
_receivedData = [[NSMutableData alloc] init];
}
return self;
}
- (void)startCrawling {
NSURLRequest *request = [NSURLRequest requestWithURL:_targetURL];
_connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[_receivedData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[_receivedData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// 创建AudioFilter对象
AudioFilter *audioFilter = [[AudioFilter alloc] init];
// 过滤和处理音频数据
NSArray *filteredAudioArray = [audioFilter filterAudioData:self.receivedData];
// 将音频信息存储到本地存储中
[self saveAudioDataToLocal:filteredAudioArray];
}
- (void)saveAudioDataToLocal:(NSArray *)audioArray {
// 实现将音频信息存储到本地存储的逻辑
// 可以使用文件系统、数据库或其他存储方式进行存储
// 这里只是示例,具体的存储方式根据需求进行选择和实现
for (NSDictionary *audioDict in audioArray) {
NSString *audioTitle = audioDict[@"title"];
NSString *audioURL = audioDict[@"url"];
// 将音频信息存储到本地存储中
// ...
NSLog(@"Saving audio - Title: %@, URL: %@", audioTitle, audioURL);
}
}
@end