关于ASIHTTPRequest的使用总结

最新推荐文章于 2025-12-17 14:18:11 发布

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本文介绍如何使用ASIHTTPRequest和ASIFormDataRequest进行文件的上传和下载，包括设置请求头、处理响应及异常情况。

分享类型：应用开发相关

使用ASIHTTPRequest可以很方便的进行一下操作：

同步/异步方式下载数据
定义下载队列，让队列中的任务按指定的并发数来下载（队列下载必须是异步的)
提交表单，文件上传
处理cookie
设置代理
上下载进度条
重定向处理
请求与响应的GZIP
验证与授权

（1）使用中经常用到的是ASIHTTPRequest以及ASIFormDataRequest

ASIHTTPRequest用于一般的网络请求、下载等都没有问题，ASIFormDataRequest更加的适用于带有参数的网络请求，当然ASIHTTPRequest也能够实现；

（2）使用ASIHTTPRequest进行下载

ASIHTTPRequest * downloadRequest = [ASIHTTPRequest requestWithURL:url];

//设置目的地址
[downloadRequest setDownloadDestinationPath:path];
// 设置临时地址
[downloadRequest setTemporaryFileDownloadPath:[path stringByAppendingString:@".tmpDLFile"]];
//保存下载文件title
downloadRequest.userInfo = [NSDictionary dictionaryWithObjectsAndKeys:fileTitle,@"fileTitle", nil];
//设置委托
[downloadRequest setDelegate:self];
//设置是是否支持断点下载
[downloadRequest setAllowResumeForFileDownloads:YES];

//支持后台
[downloadRequest setShouldContinueWhenAppEntersBackground:YES];
//完成后调用
[downloadRequest setDidFinishSelector:@selector(downloadFinish:)];

[downloadRequest setDidFailSelector:@selector(downfailed:)];

[downloadRequest startAsynchronous];

3）使用ASIHTTPRequest上传文件（例子google语音识别）

- (void)sendRequest:(id)sender {
NSURL *URL = [NSURL URLWithString:@"http://www.google.com/speech-api/v1/recognize?xjerr=1&client=chromium&lang=zh-CN&maxresults=9"];
ASIHTTPRequest *request = [[[ASIHTTPRequest alloc]initWithURL:URL] autorelease];

[request addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"];
[request addRequestHeader:@"Content-Type" value:@"audio/x-flac; rate=16000"];

[request setRequestMethod:@"POST"];

NSData *data = [NSData dataWithContentsOfFile:@"/Users/adminadmin/Desktop/hello.flac"];
NSLog(@"date:%@",data);
[request appendPostData:data];
[request setDidFinishSelector:@selector(didFinishPost:)];
[request setDidFailSelector:@selector(didFailedPost:)];

[request setDelegate:self];
[request startSynchronous];

（4）使用ASIFormDataRequest 上传带有参数的请求

- (void) upload{

NSString *postURLString = [NSString stringWithFormat:@"http://....?method=SaveData"];
NSURL *URL = [[[NSURL alloc]initWithString:postURLString] autorelease];

ASIFormDataRequest *postRequest = [[[ASIFormDataRequest alloc]initWithURL:URL] autorelease];
NSLog(@"url:%@",postRequest.url);

postRequest.defaultResponseEncoding = NSUTF8StringEncoding;

[postRequest addRequestHeader:@"User-Agent" value:@"ASIHTTPRequest"];
[postRequest addRequestHeader:@"Content-Type" value:@"charset=utf-8"];

[postRequest setPostValue:value1 forKey:@"subject"];
[postRequest setPostValue:value2 forKey:@"content"];

[postRequest setDelegate:self];
[postRequest setTimeOutSeconds:180.0];
[postRequest setDidFinishSelector:@selector(didFinishPost:)];
[postRequest setDidFailSelector:@selector(didFailPost:)];
[postRequest startAsynchronous];

}