Form-based File Upload in HTML（RFC-1867）

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RootViewController.m

#import "RootViewController.h"#define URL @"http://localhost:8080/TestOne/upload3.jsp"@implementation RootViewController- (void)viewDidLoad{    [super viewDidLoad];        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];    button.frame = CGRectMake(100, 100, 100, 50);    [button setTitle:@"发送图片" forState:0];    button.backgroundColor = [UIColor groupTableViewBackgroundColor];    [self.view addSubview:button];    [button addTarget:self action:@selector(postImageAction:) forControlEvents:7];}-(void)postImageAction:(UIButton *)sender{    //分界线的标示符，用于区分每一条    NSString *TWITTERFO_FORM_BOUNDARY = @"AaB03x";    //根据url初始化request    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:                                     [NSURL URLWithString:URL]                                                            cachePolicy:NSURLRequestReloadIgnoringCacheData                                                       timeoutInterval:10];    //分界线 --AaB03x    NSString *MPboundary = \    [[NSString alloc] initWithFormat:@"--%@",TWITTERFO_FORM_BOUNDARY];    //结束符AaB03x--    NSString *endMPboundary = [[NSString alloc]initWithFormat:@"%@--",MPboundary];    //字典存多少张图片    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:[UIImage imageNamed:@"163.png"],@"File1",@"huen",@"user",nil];    //要上传图片    UIImage *image = [params objectForKey:@"File1"];    NSData *data = UIImagePNGRepresentation(image);    //http body 的字符串    NSMutableString *body = [[NSMutableString alloc]init];    //参数的所有key的    NSArray *keys = [params allKeys];    for (int i = 0; i < [params count]; i++)    {        //得到当前key        NSString *key = [keys objectAtIndex:i];        //如果key不是图片类型        if (![key isEqualToString:@"File1"])        {            //添加分界线，换行            [body appendFormat:@"%@\r\n",MPboundary];            //添加字段名称，换2行            [body appendFormat:@"Content-Disposition:form-data;name=\"%@\"\r\n\r\n",key];            //添加字段的值            [body appendFormat:@"%@\r\n",[params objectForKey:key]];        }    }    ///////////////////////////////传图////////////////////////////////////////////////    //添加分界线换行    [body appendFormat:@"%@\r\n",MPboundary];    //给据heml控件neme的值声明File1字段，文件名为163.png    [body appendFormat:@"Content-Disposition:form-data;name=\"File1\";filename=\"163.png\"\r\n"];    //声明上传文件的格式    [body appendFormat:@"Content-Type:image/png\r\n\r\n"];    //声明结束符    NSString *end = [[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];    ///////////////////////////////////////////////////////////////////////////////////    //声明myRequestData,用来放入http body    NSMutableData *myRequestData = [NSMutableData data];    //将body字符串转化为UTF-8    [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];    //将image加入data    [myRequestData appendData:data];    //加入结束符--AaB03x--    [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];    ///////////////////////////////设置Content////////////////////////////////////////    //设置httpHeader中Content-Type的值    NSString *content = [[NSString alloc]initWithFormat:@"multipart/form-data;boundary=%@",TWITTERFO_FORM_BOUNDARY];    //设置HttpHeader    [request setValue:content forHTTPHeaderField:@"Content-Type"];    //设置Content-Length    [request setValue:[NSString stringWithFormat:@"%d",[myRequestData length]] forHTTPHeaderField:@"Content-Length"];    //设置Http body    [request setHTTPBody:myRequestData];    //http Method    [request setHTTPMethod:@"POST"];        NSError * err;    NSHTTPURLResponse * response;    NSData *urlData = [NSURLConnection sendSynchronousRequest:request                                            returningResponse:&response                                                        error:&err];    NSString * responseStr = [[NSString alloc] initWithData:urlData                                                   encoding:NSUTF8StringEncoding];    NSLog(@"responseStr = %@",responseStr);    // 打印回应和错误信息    NSLog(@"response = %@",[NSHTTPURLResponse localizedStringForStatusCode:[response statusCode]]);}@end

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