Intercept Ajax calls in UIWebview - iOS

Step 1

/*

Steps to follow

1. Copy the following code.

2. Paste in text file.

3. Save as ajax_handler.js

4. keep this file in your resource folder

var s_ajaxListener = new Object();

s_ajaxListener.tempOpen = XMLHttpRequest.prototype.open;

s_ajaxListener.tempSend = XMLHttpRequest.prototype.send;

s_ajaxListener.callback = function () {

    window.location='mpAjaxHandler://' + this.url;

};

XMLHttpRequest.prototype.open = function(a,b) {

    if (!a) var a='';

    if (!b) var b='';

    s_ajaxListener.tempOpen.apply(this, arguments);

    s_ajaxListener.method = a;

    s_ajaxListener.url = b;

    if (a.toLowerCase() == 'get') {

        s_ajaxListener.data = b.split('?');

        s_ajaxListener.data = s_ajaxListener.data[1];

    }

}

XMLHttpRequest.prototype.send = function(a,b) {

    if (!a) var a='';

    if (!b) var b='';

    s_ajaxListener.tempSend.apply(this, arguments);

    if(s_ajaxListener.method.toLowerCase() == 'post')s_ajaxListener.data = a;

    s_ajaxListener.callback();

}

Step 2

//.m file

@interface WebViewController ()

{

}

@property (weak, nonatomic) IBOutlet UIWebView *aWebView;

@end

@implementation WebViewController

static NSString *JSHandler;

- (void)viewDidLoad {

    

    [super viewDidLoad];

    

    JSHandler = [NSString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"ajax_handler" withExtension:@"js"] encoding:NSUTF8StringEncoding error:nil];

}

#pragma mark - Web Delegates - 

- (void)webViewDidStartLoad:(UIWebView *)webView

{

    [webView stringByEvaluatingJavaScriptFromString:JSHandler];

}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

{

    if ([[request.URL absoluteString] containsString://ajex function name]) {

        //do something

        return NO;

    }

    

    return YES;

}