웹페이지 읽어오기

iOS 초보 2014. 7. 2. 18:24
웹페이지를 보여줄때, 
그냥 UIWebView 에 바로 보여주지 않고,

웹페이지를 따로 호출해서, html 받아오고,
그 스트링을 UIWebView 에 넣는 방법.
왜 이렇게 했냐하면, 웹페이지 로딩 진행바를 화면에 표시해 주기 위해서였다.

근데, 실제로 해보니까,
html 스트링 자체는 크기가 별로 안커서, 서버에서 금방 받아오는데
html 안에 들어있는, 이미지등 다른 요소들의 로딩시간이 더 많이 걸려서
별로 효과가 좋지는 않다.

html 스트링을 읽어오는 동안은 진행바가 표시되는데...
그 시간은 짧아서, 진행바가 금방 100% 까지 차고,
그 이후에, 실제 이미지들을 로딩하니까,
진행바가 100% 까지 가서, 한동안 그대로 있다가,
웹 페이지가 보여지게 된다.


//******************************************************************************
// LibWeb.h
//******************************************************************************
#import <Foundation/Foundation.h>
#import "LibProtocol.h"

#define WINGLISH_URL_BASE      @"http://xxx/"
#define WINGLISH_URL_LOGIN     @"http://xxxxx"
#define WINGLISH_URL_TEACHER   @"http://xxxxxx"
#define WINGLISH_URL_LEVELTEST @"http://xxxxxxx"
#define WINGLISH_URL_SCHEDULE  @"http://xxxxxxxxxx"
#define WINGLISH_URL_MYINFO    @"http://xxxxxxxx"
#define WINGLISH_URL_REPORT    @"http://xxxxxxxxxxxxxxx"

@interface LibWeb : NSObject
{
  @private
  int iHTMLFlag;
  NSMutableData* dataHTML;
  long long iTotalReceiveByte;
  //NSURLRequest* urlRequest;
  NSMutableURLRequest* urlRequest;
  
  @public
  NSString* sHTML;
  
  id <LibProtocolWeb> libProtocolWeb;
}

  - (id)initWithURL:(NSString*)sURL withHTMLFlag:(int)i;

@end




//******************************************************************************
// LibWeb.m
//******************************************************************************
#import "LibWeb.h"

static NSArray* aryCookies;

@implementation LibWeb

- (id)initWithURL:(NSString*)sURL withHTMLFlag:(int)i
{
  self = [super init];
  if(self == nil) return self;
  
  iHTMLFlag = i;
  dataHTML = [[NSMutableData alloc] init];
  
  urlRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:sURL]];
  NSURLConnection* urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
  [urlConnection release];

  return self;
}

#pragma mark - NSURLConnectionDelegate Methods

//------------------------------------------------------------------------------
// 서버 접속 시작
//------------------------------------------------------------------------------
- (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)response
{
  [libProtocolWeb webDataReceiveStart];
  return request;
}

//------------------------------------------------------------------------------
// 헤더를 다 받았을때...
//------------------------------------------------------------------------------
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
  long long iContentLength = [response expectedContentLength];
  
  NSLog(@"iContentLength=[%lld]", iContentLength);
  
  // chunked 일때는, 전체 크기를 알수 없다. 그래서 대충 큰 값으로 셋팅함.
  if(iContentLength == NSURLResponseUnknownLength) iContentLength = 999999;
  
  if([libProtocolWeb respondsToSelector:@selector(webSetContentLength:)])
    [libProtocolWeb webSetContentLength:iContentLength];
}

//------------------------------------------------------------------------------
// 데이타 받는중...
//------------------------------------------------------------------------------
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
  NSLog(@"webDataReceiving");
  [dataHTML appendBytes:data.bytes length:data.length];
  
  //NSLog(@"dataHTML.length=[%u]", dataHTML.length);
  //NSLog(@"data=[%@]", data);
  NSString* s = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
  NSLog(@"s=[%@]", s);
  
  if([libProtocolWeb respondsToSelector:@selector(webDataReceiving:)])
    [libProtocolWeb webDataReceiving:dataHTML.length];
}

//------------------------------------------------------------------------------
// 데이타 다 받았을때...
//------------------------------------------------------------------------------
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
  iTotalReceiveByte = dataHTML.length;
  
  // 받은데이타를 모두 문자열로 바꾼다.
  //sHTML = [[NSString alloc] initWithData:dataHTML encoding:NSUTF8StringEncoding]; // utf-8
  //sHTML = [[NSString alloc] initWithData:dataHTML encoding:-2147481280]; // euc-kr

  NSString* sURL = [[urlRequest URL] absoluteString];
  if([sURL isEqualToString:WINGLISH_URL_TEACHER])
    sHTML = [[NSString alloc] initWithData:dataHTML encoding:-2147481280]; // euc-kr
  else
    sHTML = [[NSString alloc] initWithData:dataHTML encoding:NSUTF8StringEncoding]; // utf-8
  
  
  NSLog(@"iTotalReceiveByte = [%lld]", iTotalReceiveByte);
  //NSLog(@"sHTML = [%@]", sHTML);
  
  [libProtocolWeb webDataReceiveDone:true flag:iHTMLFlag iTotalBytes:iTotalReceiveByte];
}

//------------------------------------------------------------------------------
// 에러났을때...
//------------------------------------------------------------------------------
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
  UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"" message:@"데이타 수신중 에러 발생 !" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
  [alert release];
}

//------------------------------------------------------------------------------
// 로그인페이지를 호출했을때, 로그인 결과값 검사
//------------------------------------------------------------------------------
- (bool)checkWinglishLoginResult
{
  NSLog(@"checkWinglishLoginResult=[%@]", [sHTML substringToIndex:1]);
  
  // 로그인 실패
  if(![[sHTML substringToIndex:1] isEqualToString:@"Y"])
  {
    UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"" message:@"로그인 실패 !\nID 또는 Password 가 잘못되었습니다" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
    [alert release];
    return false;
  }
  
  /*
  // 로그인 성공. 쿠키값을 static 변수에 저장함.
  aryCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
  
  // 생성된 쿠키 찍어봄
  NSLog(@"-------------------------------");
  NSHTTPCookie *cookie;
  for (cookie in aryCookies)
  {
    NSLog(@"cookie.name=[%@] cookie.value=[%@]", cookie.name, cookie.value);
  }
  NSLog(@"-------------------------------");
  */
  
  return true;
}

- (void)dealloc
{
  [urlRequest release];
  [dataHTML release];
  [sHTML release];
  [super dealloc];
}

@end



//******************************************************************************
// TeacherView.h
//******************************************************************************
LibWeb* libWeb;
UIWebView* wvMain;
NSMutableArray* aryHTMLPage;
int iTotalContentLength;
UILabel* lblWaitingMessage;
UIProgressView* pvWaiting;


//******************************************************************************
// TeacherView.m
//******************************************************************************
//------------------------------------------------------------------------------
// 초기화
//------------------------------------------------------------------------------
- (id)initWithFrame:(CGRect)frame
{
  // webview
  wvMain = [[UIWebView alloc] initWithFrame:CGRectMake(frame.origin.x, 38.0, frame.size.width, 374.0)];
  wvMain.backgroundColor = [UIColor clearColor];
  wvMain.delegate = self;
  wvMain.dataDetectorTypes = UIDataDetectorTypeNone;
  NSURLRequest* request = [NSURLRequest requestWithURL:[NSURL URLWithString:WINGLISH_URL_TEACHER]];
  [wvMain loadRequest:request];
  [self addSubview:wvMain];

  [self requestWebPage:WINGLISH_URL_TEACHER];
  
  return self;
}

//------------------------------------------------------------------------------
// 웹페이지 호출
//------------------------------------------------------------------------------
- (void)requestWebPage:(NSString*)sURL
{
  if(libWeb != nil)
  {
    [libWeb release];
    libWeb = nil;
  }
  
  libWeb = [[LibWeb alloc] initWithURL:sURL withHTMLFlag:1];
  libWeb->libProtocolWeb = self;
}

//------------------------------------------------------------------------------
// HTML 문자열을 webview에 보여주기
//------------------------------------------------------------------------------
- (void)showHTMLPage:(NSString*)sHTML withSaveOption:(bool)b
{
  if(b) [aryHTMLPage addObject:sHTML];
  
  [wvMain loadHTMLString:sHTML baseURL:[NSURL URLWithString:WINGLISH_URL_BASE]];
  
  NSLog(@"aryHTMLPage.count = [%d]", aryHTMLPage.count);
  if(aryHTMLPage.count > 1)
    btnBack.alpha = 1.0;
  else
    btnBack.alpha = 0.0;
}

//------------------------------------------------------------------------------
// Back 버튼
//------------------------------------------------------------------------------
- (void)goBack:(UIButton*)btn
{
  [aryHTMLPage removeLastObject];
  NSString* sHTML = [aryHTMLPage lastObject];
  
  [self showHTMLPage:sHTML withSaveOption:false];
}

//------------------------------------------------------------------------------
// 웹페이지 로딩 진행바 보여주기
//------------------------------------------------------------------------------
- (void)progressShow:(float)iProgress
{
  if(lblWaitingMessage == nil)
  {
    lblWaitingMessage = [[UILabel alloc] initWithFrame:CGRectMake(LibDeviceInfo.SCREEN_WIDTH/2-LibDeviceInfo.SCREEN_WIDTH/4, LibDeviceInfo.SCREEN_HEIGHT/2-90.0, LibDeviceInfo.SCREEN_WIDTH/2, 120.0)];
    lblWaitingMessage.layer.cornerRadius = 15.0;
    lblWaitingMessage.layer.masksToBounds = YES;
    lblWaitingMessage.layer.borderColor = [UIColor lightGrayColor].CGColor;
    lblWaitingMessage.layer.borderWidth = 1.5;
    lblWaitingMessage.backgroundColor = [UIColor blueColor];
    lblWaitingMessage.alpha = 0.5;
    lblWaitingMessage.text = @"loading...";
    lblWaitingMessage.textColor = [UIColor whiteColor];
    lblWaitingMessage.textAlignment = UITextAlignmentCenter;
    lblWaitingMessage.font = [UIFont boldSystemFontOfSize:14.0];
    [self addSubview:lblWaitingMessage];
    
    pvWaiting = [[UIProgressView alloc] initWithFrame:CGRectMake(5.0, 40.0, lblWaitingMessage.frame.size.width-10.0, 10.0)];
    [lblWaitingMessage addSubview:pvWaiting];
  }
  
  //NSLog(@"iProgress=[%f]", [iProgress floatValue]);
  [pvWaiting setProgress:iProgress];
  
  float iAISize = 30;
  CGRect frame = CGRectMake(LibDeviceInfo.SCREEN_WIDTH/2-(iAISize/2), LibDeviceInfo.SCREEN_HEIGHT/2-(iAISize/2), iAISize, iAISize);
  [LibCommon activityIndicatorShow:frame withOwnerView:self];
}


//------------------------------------------------------------------------------
// 웹페이지 로딩 진행바 숨기기
//------------------------------------------------------------------------------
- (void)progressHide
{
  if(pvWaiting != nil)
  {
    [pvWaiting removeFromSuperview];
    [pvWaiting release];
    pvWaiting = nil;
  }
  
  if(lblWaitingMessage != nil)
  {
    [lblWaitingMessage removeFromSuperview];
    [lblWaitingMessage release];
    lblWaitingMessage = nil;
  }
  
  [LibCommon activityIndicatorHide];
}



#pragma mark - UIWebViewDelegate Methods

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
  NSString* sRequestURL = [[request URL] absoluteString];
  NSLog(@"url=[%@] navigationType=[%d]", sRequestURL, navigationType);

  if([sRequestURL isEqualToString:WINGLISH_URL_BASE]) return YES;

  [self requestWebPage:sRequestURL];
 
  return YES;
}

- (void)webViewDidStartLoad:(UIWebView *)webView
{
  NSLog(@"webViewDelegate webViewDidStartLoad");
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
  NSLog(@"webViewDelegate webViewDidFinishLoad");
  [self progressHide];
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
  NSLog(@"webViewDelegate didFailLoadWithError");
  [self progressHide];
}


#pragma mark - LibProtocolWeb Methods

//------------------------------------------------------------------------------
// 데이타 받기 시작할때
//------------------------------------------------------------------------------
- (void)webDataReceiveStart
{
  NSLog(@"webDataReceiveStart");
  [self progressShow:0.0];
}

//------------------------------------------------------------------------------
// 데이타의 헤더를 다 받아서, 전체 Content Length 를 알아냈을때
//------------------------------------------------------------------------------
- (void)webSetContentLength:(long long)iContentLength
{
  iTotalContentLength = iContentLength;
}

//------------------------------------------------------------------------------
// 데이타를 받고있는 중일때
//------------------------------------------------------------------------------
- (void)webDataReceiving:(long long)iReceivedBytes
{
  float iDownloadRate = iReceivedBytes / iTotalContentLength * 100;
  if(iDownloadRate >= 100.0) iDownloadRate = 100.0;
  [self progressShow:iDownloadRate];
}

//------------------------------------------------------------------------------
// 데이타를 다 받았을때
//------------------------------------------------------------------------------
- (void)webDataReceiveDone:(bool)bOK flag:(int)iFlag iTotalBytes:(long long)iTotalBytes
{
  NSLog(@"webDataReceiveDone");
  [self showHTMLPage:libWeb->sHTML withSaveOption:true];
}


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