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

 

 

11-了解-获得文件的MIMEType

 

//
//  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