IOS网络请求，封装文件上传操作详解手机开发

+ (JRUploadRequest *)uploadRequestWithPath:(NSString *)path; - (JRUploadRequest *)initWithPath:(NSString *)path; //开始上传 - (void)upload;
//2.请求题 //1 拼接开始标志（服务器遇到这个标记就开始解析）("JR"要和请求头中的数据一致) [body appendData:JREncode(@"--JR/r/n")]; //2 设置服务器接受参数和文件名称（ NSString * filename = [NSString stringWithFormat:@"Content-Disposition: form-data;name=/"file/";filename=/"%@/" /r/n", self.fileName]; [body appendData:JREncode(filename)]; //3 拼接上传的文件类型 NSString * mimeType= [self getMimeType: self.sourcePath]; NSLog(@"======%@",mimeType); NSString * contentType=[NSString stringWithFormat:@"Content-Type: %@/r/n",mimeType]; [body appendData:JREncode(contentType)]; //4 拼接换行 [body appendData:JREncode(@"/r/n")]; //5 拼接数据 [body appendData:self.sourceData]; //6 拼接换行 [body appendData:JREncode(@"/r/n")]; //7 拼接结束标志 [body appendData:JREncode(@"--JR--/r/n")]; //8 设置请求体 self.HTTPBody=body;
//1 设置文件的长度 [self setValue:[NSString stringWithFormat:@"%ld",body.length] forHTTPHeaderField:@"Content-Length"]; //2 设置类型和开始标志 [self setValue:@"multipart/form-data; boundary=JR" forHTTPHeaderField:@"Content-Type"]; //上传 [NSURLConnection sendAsynchronousRequest:self queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) { NSString * str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"========%@",str); }];
//获取本地的URL NSURL * url=[NSURL fileURLWithPath:path];//不要使用URLWithString这个方法 NSURLRequest * request=[NSURLRequest requestWithURL:url]; NSURLResponse * response=nil; //不能使用异步方法，因为如果是异步的，返回的字符串是空 [NSURLConnection sendSynchronousRequest:request returningResponse: response error:nil]; return response.MIMEType;