iOS開發網路篇—檔案的上傳

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iOS開發網路篇—檔案的上傳

說明:檔案上傳使用的時POST請求,通常把要上傳的資料儲存在請求體中。本文介紹如何不藉助第三方架構實現iOS開發中得檔案上傳。

  由於過程較為複雜,因此本文只貼出部分關鍵代碼。

主控制器的關鍵代碼:

YYViewController.m

#import "YYViewController.h"#define YYEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding]@interface YYViewController ()@end@implementation YYViewController- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (void)upload:(NSString *)name filename:(NSString *)filename mimeType:(NSString *)mimeType data:(NSData *)data parmas:(NSDictionary *)params{    // 檔案上傳    NSURL *url = [NSURL URLWithString:@"http://192.168.1.200:8080/YYServer/upload"];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];    request.HTTPMethod = @"POST";        // 佈建要求體    NSMutableData *body = [NSMutableData data];        /***************檔案參數***************/    // 參數開始的標誌    [body appendData:YYEncode(@"--YY\r\n")];    // name : 指定參數名(必須跟伺服器端保持一致)    // filename : 檔案名稱    NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", name, filename];    [body appendData:YYEncode(disposition)];    NSString *type = [NSString stringWithFormat:@"Content-Type: %@\r\n", mimeType];    [body appendData:YYEncode(type)];        [body appendData:YYEncode(@"\r\n")];    [body appendData:data];    [body appendData:YYEncode(@"\r\n")];        /***************普通參數***************/    [params enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {        // 參數開始的標誌        [body appendData:YYEncode(@"--YY\r\n")];        NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n", key];        [body appendData:YYEncode(disposition)];        [body appendData:YYEncode(@"\r\n")];        [body appendData:YYEncode(obj)];        [body appendData:YYEncode(@"\r\n")];    }];        /***************參數結束***************/    // YY--\r\n    [body appendData:YYEncode(@"--YY--\r\n")];    request.HTTPBody = body;        // 佈建要求頭    // 請求體的長度    [request setValue:[NSString stringWithFormat:@"%zd", body.length] forHTTPHeaderField:@"Content-Length"];    // 聲明這個POST請求是個檔案上傳    [request setValue:@"multipart/form-data; boundary=YY" forHTTPHeaderField:@"Content-Type"];        // 發送請求    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {        if (data) {            NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];            NSLog(@"%@", dict);        } else {            NSLog(@"上傳失敗");        }    }];}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    // Socket 實現斷點上傳        //apache-tomcat-6.0.41/conf/web.xml 尋找 檔案的 mimeType//    UIImage *image = [UIImage imageNamed:@"test"];//    NSData *filedata = UIImagePNGRepresentation(image);//    [self upload:@"file" filename:@"test.png" mimeType:@"image/png" data:filedata parmas:@{@"username" : @"123"}];        // 給本地檔案發送一個請求    NSURL *fileurl = [[NSBundle mainBundle] URLForResource:@"itcast.txt" withExtension:nil];    NSURLRequest *request = [NSURLRequest requestWithURL:fileurl];    NSURLResponse *repsonse = nil;    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&repsonse error:nil];        // 得到mimeType    NSLog(@"%@", repsonse.MIMEType);    [self upload:@"file" filename:@"itcast.txt" mimeType:repsonse.MIMEType data:data parmas:@{                                                                                              @"username" : @"999",                                                                                              @"type" : @"XML"}];}@end

補充說明:

檔案上傳請求資料格式

部分檔案的MIMEType

 

 

iOS開發網路篇—檔案的上傳

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