//
// UploadFile.m
// 02.Post上传
//
// Created by why on 15-1-29.
// Copyright (c) 2015年 itcast. All rights reserved.
//
#import "UploadFile.h"
@implementation UploadFile
// 拼接字符串
static NSString *boundaryStr = @"--"; // 分隔字符串
static NSString *randomIDStr; // 本次上传标示字符串
static NSString *uploadID; // 上传(php)脚本中,接收文件字段
- (instancetype)init
{
self = [super init];
if (self) {
randomIDStr = @"itcast";
uploadID = @"uploadFile";
}
return self;
}
#pragma mark - 私有方法
- (NSString *)topStringWithMimeType:(NSString *)mimeType uploadFile:(NSString *)uploadFile
{
NSMutableString *strM = [NSMutableString string];
[strM appendFormat:@"%@%@
", boundaryStr, randomIDStr];
[strM appendFormat:@"Content-Disposition: form-data; name="%@"; filename="%@"
", uploadID, uploadFile];
[strM appendFormat:@"Content-Type: %@
", mimeType];
NSLog(@"%@", strM);
return [strM copy];
}
- (NSString *)bottomString
{
NSMutableString *strM = [NSMutableString string];
[strM appendFormat:@"%@%@
", boundaryStr, randomIDStr];
[strM appendString:@"Content-Disposition: form-data; name="submit"
"];
[strM appendString:@"Submit
"];
[strM appendFormat:@"%@%@--
", boundaryStr, randomIDStr];
NSLog(@"%@", strM);
return [strM copy];
}
#pragma mark - 上传文件
- (void)uploadFileWithURL:(NSURL *)url data:(NSData *)data
{
// 1> 数据体
NSString *topStr = [self topStringWithMimeType:@"image/png" uploadFile:@"头像1.png"];
NSString *bottomStr = [self bottomString];
NSMutableData *dataM = [NSMutableData data];
[dataM appendData:[topStr dataUsingEncoding:NSUTF8StringEncoding]];
[dataM appendData:data];
[dataM appendData:[bottomStr dataUsingEncoding:NSUTF8StringEncoding]];
// 1. Request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:2.0f];
// dataM出了作用域就会被释放,因此不用copy
request.HTTPBody = dataM;
// 2> 设置Request的头属性
request.HTTPMethod = @"POST";
// 3> 设置Content-Length
NSString *strLength = [NSString stringWithFormat:@"%ld", (long)dataM.length];
[request setValue:strLength forHTTPHeaderField:@"Content-Length"];
// 4> 设置Content-Type
NSString *strContentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", randomIDStr];
[request setValue:strContentType forHTTPHeaderField:@"Content-Type"];
// 3> 连接服务器发送请求
[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@", result);
}];
}
@end