源码0602-10-掌握-文件上传11-了解-获得文件的MIMEType

//
//  ViewController.m
//  10-掌握-文件上传
#define XMGBoundary @"520it"
#define XMGEncode(string) [string dataUsingEncoding:NSUTF8StringEncoding]
#define XMGNewLine [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

// 创建请求
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";

// 设置请求头(告诉告诉服务器,这是一个文件上传的请求)
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", XMGBoundary] forHTTPHeaderField:@"Content-Type"];

// 设置请求体
NSMutableData *body = [NSMutableData data];

// 文件参数
/*
--分割线\r\n
Content-Disposition: form-data; name="参数名"; filename="文件名"\r\n
Content-Type: 文件的MIMEType\r\n
\r\n
文件数据
\r\n
*/
// 分割线
[body appendData:XMGEncode(@"--")];
[body appendData:XMGEncode(XMGBoundary)];
[body appendData:XMGNewLine];

// 文件参数名
[body appendData:XMGEncode([NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"test.png\""])];
[body appendData:XMGNewLine];

// 文件的类型
[body appendData:XMGEncode([NSString stringWithFormat:@"Content-Type: image/png"])];
[body appendData:XMGNewLine];

// 文件数据
[body appendData:XMGNewLine];
//    UIImageJPEGRepresentation(<#UIImage *image#>, <#CGFloat compressionQuality#>)
UIImage *image = [UIImage imageNamed:@"placeholder"];
[body appendData:UIImagePNGRepresentation(image)];
//    [body appendData:[NSData dataWithContentsOfFile:@"/Users/xiaomage/Desktop/test.png"]];
[body appendData:XMGNewLine];

// 非文件参数
/*
--分割线\r\n
Content-Disposition: form-data; name="参数名"\r\n
\r\n
参数值
\r\n
*/
// 分割线
[body appendData:XMGEncode(@"--")];
[body appendData:XMGEncode(XMGBoundary)];
[body appendData:XMGNewLine];

// 参数名
[body appendData:XMGEncode([NSString stringWithFormat:@"Content-Disposition: form-data; name=\"username\""])];
[body appendData:XMGNewLine];

// 参数值
[body appendData:XMGNewLine];
[body appendData:XMGEncode(@"jack")];
[body appendData:XMGNewLine];

// 结束标记
/*
--分割线--\r\n
*/
[body appendData:XMGEncode(@"--")];
[body appendData:XMGEncode(XMGBoundary)];
[body appendData:XMGEncode(@"--")];
[body appendData:XMGNewLine];

  request.HTTPBody = body;

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}];
}

@end

//
//  NSDictionary+Log.m
//  05-掌握-多值参数
#import <Foundation/Foundation.h>

@implementation NSDictionary (Log)
- (NSString *)descriptionWithLocale:(id)locale
{
NSMutableString *string = [NSMutableString string];

// 开头有个{
[string appendString:@"{\n"];

// 遍历所有的键值对
[self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
[string appendFormat:@"\t%@", key];
[string appendString:@" : "];
[string appendFormat:@"%@,\n", obj];
}];

// 结尾有个}
[string appendString:@"}"];

// 查找最后一个逗号
NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];
if (range.location != NSNotFound)
[string deleteCharactersInRange:range];

return string;
}
@end

@implementation NSArray (Log)

- (NSString *)descriptionWithLocale:(id)locale
{
NSMutableString *string = [NSMutableString string];

// 开头有个[
[string appendString:@"[\n"];

// 遍历所有的元素
[self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[string appendFormat:@"\t%@,\n", obj];
}];

// 结尾有个]
[string appendString:@"]"];

// 查找最后一个逗号
NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];
if (range.location != NSNotFound)
[string deleteCharactersInRange:range];

return string;
}

@end

//
//  ViewController.m
//  11-了解-获得文件的MIMEType
#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>
#import "NSString+MIMEType.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

NSLog(@"%@", [@"/Users/xiaomage/Desktop/test.mp4" MIMEType]);
NSLog(@"%@", [@"/Users/xiaomage/Desktop/test.png" MIMEType2]);

//    NSLog(@"%@", [ViewController mimeTypeForFileAtPath:@"/Users/xiaomage/Desktop/test.png"]);
}

+ (NSString *)mimeTypeForFileAtPath:(NSString *)path
{
if (![[NSFileManager defaultManager] fileExistsAtPath:path]) {
return nil;
}
CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge  CFStringRef)[path pathExtension], NULL);
CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass (UTI, kUTTagClassMIMEType);
CFRelease(UTI);
if (!MIMEType) {
return @"application/octet-stream";
}
return (__bridge NSString *)MIMEType;
}

- (void)MIMEType
{
//    NSString *url = @"file:///Users/xiaomage/Desktop/test.pptx";
//    NSString *urlString = @"file:///Users/xiaomage/Desktop/test.png";
//    NSURL *url = [NSURL URLWithString:urlString];

NSURL *url = [NSURL fileURLWithPath:@"/Users/xiaomage/Desktop/test.png"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

//    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
//        NSLog(@"%@", response.MIMEType);
//    }];

NSURLResponse *response = nil;
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
NSLog(@"%@", response.MIMEType);
}

- (NSString *)getMIMEType:(NSString *)file
{
NSURLResponse *response = nil;
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:file]];
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
return response.MIMEType;
}

@end

//
//  NSString+MIMEType.h
//  11-了解-获得文件的MIMEType

#import <Foundation/Foundation.h>

@interface NSString (MIMEType)
- (NSString *)MIMEType;
- (NSString *)MIMEType2;
@end

//
//  NSString+MIMEType.m
//  11-了解-获得文件的MIMEType

#import "NSString+MIMEType.h"
#import <MobileCoreServices/MobileCoreServices.h>

@implementation NSString (MIMEType)
- (NSString *)MIMEType
{
if (![[NSFileManager defaultManager] fileExistsAtPath:self]) {
return nil;
}
CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge  CFStringRef)[self pathExtension], NULL);
CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass (UTI, kUTTagClassMIMEType);
CFRelease(UTI);
if (!MIMEType) {
return @"application/octet-stream";
}
return (__bridge NSString *)MIMEType;
}

- (NSString *)MIMEType2
{
NSURLResponse *response = nil;
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:self]];
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
return response.MIMEType;
}
@end