课堂笔记—— post 上传
- (void)btnLoad_Touch:(id)sender {
// 接收文件上传的地址
NSString *urlString = @"http://localhost/BookReaderData/UploadFileWithPost.php";
// 要上传的文件的文件名
NSString *folder = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *fileName = [folder stringByAppendingPathComponent:@"img3.jpg"];
NSLog(@"Post filename is %@", fileName); /**fileName设置为上传文件的文件名（可以虚构）**/
// 服务器端上传表单项的名称，一定与服务器端接收文件的名一致
NSString *uploadInputFieldName = @"file"; /**将file改为上传文件的参数名**/
// 要传递的POST的参数，其中file对应上传文件的文件名
NSDictionary *params = @{
uploadInputFieldName: fileName,
@"key1": @"Value1" // 其他要POST传递的参数
};
/******文件转为NSData*******/
//要上传的文件
NSString *imageFileName = [params objectForKey:uploadInputFieldName];
//得到图片的data
NSData* data = [NSData dataWithContentsOfFile:imageFileName];/**NSData是上传文件的二进制内容**/
/*************************/
/*********************以上按需要修改，下面的代码为固定代码，一般不需要修改*************************/
//分界线的标识符
NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";
//根据url初始化request
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:10];
//分界线 --AaB03x
NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];
//结束符 AaB03x--
NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
//http body的字符串
NSMutableString *body=[[NSMutableString alloc]init];
//参数的集合的所有key的集合
NSArray *keys= [params allKeys];
//遍历keys
for(int i=0;i<[keys count];i++)
{
//得到当前key
NSString *key=[keys objectAtIndex:i];
//如果key不是pic，说明value是字符类型，比如name：Boris
if(![key isEqualToString:uploadInputFieldName])
{
//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]];
}
}
////添加分界线，换行
[body appendFormat:@"%@\r\n",MPboundary];
//声明pic字段，文件名为boris.png
[body appendFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", uploadInputFieldName, fileName];
//声明上传文件的格式
[body appendFormat:@"Content-Type: image\r\n\r\n"];
//声明结束符：--AaB03x--
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UTF8格式的二进制
[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
//将image的data加入
[myRequestData appendData:data];
//加入结束符--AaB03x--
[myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
//设置HTTPHeader中Content-Type的值
NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];
//设置HTTPHeader
[request setValue:content forHTTPHeaderField:@"Content-Type"];
//设置Content-Length
[request setValue:[NSString stringWithFormat:@"%ld", [myRequestData length]] forHTTPHeaderField:@"Content-Length"];
//设置http body
[request setHTTPBody:myRequestData];
//http method
[request setHTTPMethod:@"POST"];
/**********************************/
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSURLSessionDataTask *dataTash = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (error) {
NSLog(@"%@", error);
}
else {
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"Response is %@", responseString);
}
}];
[dataTash resume];
}
