all pages in this file and others like this are blurred, by the looks of it, it's page 3, 6, 6, 9, 12 (counting in three's)

https://www.studocu.com/en-us/document/university-of-miami/biology-of-animals/bil320-review-for-exam-2-lecture-notes/38691688 like this from different universities as well.

these are the page that are being blurred, however, its not just this page its all the others pages that are higher than 70 pages as well.

This worked for me:

function unblurImages() {
    const blurredImages = document.querySelectorAll('img[alt*="Blurred content"]');

    blurredImages.forEach((image) => {
        if (image.src.includes('/blurred/')) image.src = image.src.replace('/blurred/', '/');

        if (image.hasAttribute('srcset')) image.srcset = image.srcset.split(',').map(src => src.replace('/blurred/', '/')).join(',');

        image.classList.add('bi', 'x0', 'y0', 'w1', 'h1');

        if (image.parentElement.classList.contains('blurred-container')) image.parentElement.classList.remove('blurred-container');
    });
}

function cleanUpPageContent() {
    const pages = document.querySelectorAll('.page-content');

    pages.forEach(page => {
        Array.from(page.parentNode.childNodes).forEach(sibling => {
            if (sibling !== page && sibling.nodeType === Node.ELEMENT_NODE) sibling.remove();
        });

        page.classList.add('nofilter');
    });
}

window.addEventListener('load', function() {
    cleanUpPageContent();
    document.getElementById('viewer-wrapper').addEventListener('scroll', unblurImages);
    document.getElementById('document-wrapper').addEventListener('scroll', unblurImages);
});

@chrisfeldkircher So i tried your code into reove blur.js of the extension but it still didnt work 20240117_113843

@Destro9000 Ah, this is an issue I am currently working on. Seems like, in the print view, the new window does not have permission to load the unblurred resources from the server. In the normal scroll view, however, they load just fine. So caching them directly there would solve the problem (I hope). Could you look into the console and tell me if there are any 403 errors?

Ah, this is an issue I am currently working on. Seems like, in the print view, the new window does not have permission to load the unblurred resources from the server. In the normal scroll view, however, they load just fine. Could you look into the console and tell me if there are any 403 errors?

yes there is one 403 error : " Failed to load resource: net::ERR_BLOCKED_BY_CLIENT widget.trustpilot.com/stats/TrustboxImpression?locale=it&styleWidth=100%25&theme=light&url=https%3A%2F%2Fwww.studocu.com%2Fit%2Fdocument%2Funiwersytet-im-adama-mickiewicza-w-poznaniu%2Fprawo-miedzynarodowe-publiczne%2Fskrypt-prawo-miedzynarodowe-publiczne-uam%2F21657310&referrer=https%3A%2F%2Fwww.studocu.com%2Fit%2Fsearch%2Fskrypt%2520prawo%2520miedzynarodowe%2520publiczne%3Forigin%3Dheader&userAgent=Mozilla%2F5.0%20(Windows%20NT%2010.0%3B%20Win64%3B%20x64)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F120.0.0.0%20Safari%2F537.36&language=en-US&platform=Win32&nosettings=1&businessUnitId=5c6bbef2ddf81b0001d62aeb&widgetId=5419b6ffb0d04a076446a9af:1

   Failed to load resource: net::ERR_BLOCKED_BY_CLIENT

page3.webp:1

   Failed to load resource: the server responded with a status of 403 ()

page9.webp:1

   Failed to load resource: the server responded with a status of 403 ()

page6.webp:1

   Failed to load resource: the server responded with a status of 403 ()

21657310:1 Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received "

I see. Does this only happen when you click download or directly when scrolling through on the main site?

@Destro9000 Ah, this is an issue I am currently working on. Seems like, in the print view, the new window does not have permission to load the unblurred resources from the server. In the normal scroll view, however, they load just fine. So caching them directly there would solve the problem (I hope). Could you look into the console and tell me if there are any 403 errors?

btw they dont show up even before clicking on download and going to the print page

I see. Does this only happen when you click download or directly when scrolling through on the main site?

what a timing , i answered just right now above xd

Hmm, this is very confusing. I am trying to understand why it is working for me. The only changes I made were to the remove-blur.js (the code I posted) and one addition to remove-banner.js, as it would not catch all banners and a function in the check_version.js to scroll through all the content to load the pages (otherwise, they would be missing in the download view, as they are loaded when the user scrolls). The remove-banner addition should not influence this, and I intentionally deleted the scroll functionality to see if that would change anything, but it did not.

Anyway, you may want to try my code and see if this works for you. In the check_version.js, I added a loading screen when the script scrolls through the site to load the content and changed the user icon to the anonymous one you see in the image. In case you were wondering.

check_version.js:

window.addEventListener('load', function() {
    initializeExtension();
});

function initializeExtension() {
    try {
        let extensionVersion = chrome.runtime.getManifest().version;
        updateAllLogos();
        replaceUserIcons();
        fetchAllContent();
    } catch (error) {
        console.error('Initialization Error:', error);
    }

    try {
        setupSidebarToggleListener();
    } catch (error) {
        console.error('Sidebar Toggle Error:', error);
    }
}

function updateAllLogos() {
    const studocuLogos = document.querySelectorAll('[aria-label="Studocu Logo"]');
    studocuLogos.forEach(updateLogo);
}

function updateLogo(logoElement) {
    const logoSvg = logoElement.firstChild;
    logoSvg.innerHTML = 
    `<g transform="matrix(0.030577, 0, 0, -0.031212, 0.081575, 28.593828)" fill="#000000" stroke="none" style="">
    <path d="M152 849 c-65 -25 -117 -76 -131 -126 -27 -95 -3 -194 58 -246 18 -15 91 -57 162 -93 143 -73 166 -97 154 -161 -13 -70 -123 -98 -184 -48 -16 14 -35 41 -41 60 l-12 35 -79 0 -79 0 0 -43 c0 -59 41 -138 88 -170 47 -33 107 -46 203 -47 183 0 279 81 279 235 -1 121 -47 174 -236 273 -137 71 -163 96 -150 145 8 35 44 58 95 60 45 1 81 -24 101 -74 12 -29 14 -29 92 -29 l80 0 -4 54 c-6 78 -41 126 -119 165 -55 27 -72 31 -143 30 -56 0 -97 -6 -134 -20z" style="fill: rgb(59, 58, 58);"></path>
    <path d="M1670 435 l0 -415 85 0 85 0 0 175 0 175 125 0 125 0 0 -175 0 -175 80 0 80 0 0 415 0 415 -85 0 -85 0 0 -160 0 -160 -120 0 -120 0 0 160 0 160 -85 0 -85 0 0 -415z" style="fill: rgb(1, 153, 236);"></path>
    <path d="M3540 440 l0 -410 80 0 80 0 0 120 c0 149 3 149 104 -11 l72 -114 87 -3 c53 -2 87 1 87 7 0 10 -105 179 -163 265 -15 21 -27 44 -27 51 0 6 41 68 90 138 50 70 90 130 90 132 0 11 -167 4 -182 -7 -8 -7 -35 -42 -58 -78 -47 -72 -79 -110 -92 -110 -4 0 -8 97 -8 215 l0 215 -80 0 -80 0 0 -410z" style="fill: rgb(1, 153, 236);"></path>
    <path d="M699 723 c-1 -10 -1 -32 0 -50 3 -34 -27 -73 -54 -73 -21 0 -35 -33 -35 -84 l0 -46 45 0 45 0 0 -160 c0 -251 5 -257 258 -294 21 -3 22 0 22 75 0 75 -1 79 -22 79 -13 0 -37 9 -54 19 -37 22 -44 52 -44 189 l0 92 60 0 60 0 0 75 0 75 -60 0 -60 0 0 60 0 60 -80 0 c-69 0 -80 -2 -81 -17z" style="fill: rgb(59, 58, 58);"></path>
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    <path d="M3071 619 c-79 -31 -123 -102 -142 -230 -15 -101 7 -234 48 -293 49 -69 80 -81 218 -81 110 0 124 2 165 25 55 31 89 88 92 156 l3 49 -78 3 -77 3 -6 -30 c-17 -85 -125 -108 -178 -38 -18 25 -21 42 -21 137 0 126 14 158 79 175 50 12 85 -7 111 -62 l20 -42 78 -1 c87 0 85 -2 66 80 -15 65 -47 107 -103 135 -44 22 -63 25 -150 24 -56 0 -112 -5 -125 -10z" style="fill: rgb(1, 153, 236);"></path>
     <path d="M1050 388 c0 -205 3 -238 19 -274 37 -81 101 -108 250 -102 119 4 164 24 201 89 24 43 25 50 28 282 l4 237 -81 0 -81 0 0 -194 c0 -111 -5 -206 -11 -224 -13 -37 -55 -57 -104 -48 -62 12 -65 26 -65 258 l0 208 -80 0 -80 0 0 -232z" style="fill: rgb(59, 58, 58);"></path>
    </g>`;
}

function replaceUserIcons() {
    const userIcons = document.querySelectorAll('.svg-inline--fa.fa-user.fa-fw._db78be352894._6d88284663af');
    if (userIcons.length === 0) {
        console.log('No user icons found.');
        return;
    }

    userIcons.forEach(replaceIconWithSvg);
}

function replaceIconWithSvg(iconElement) {
    const svgContainer = document.createElement('div');
    svgContainer.innerHTML = 
    `<svg xmlns="http://www.w3.org/2000/svg" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" width="556" height="769" viewBox="31.5 82.5 556 769">
            <rect fill="#14213d" width="556" height="769" x="31.5" y="82.5"/>
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            </svg>`;
    iconElement.parentNode.replaceChild(svgContainer.firstChild, iconElement);
}

function setupSidebarToggleListener() {
    const sidebarToggleButton = document.querySelector('[data-test-selector="content-sidebar-toggle"]');
    sidebarToggleButton.addEventListener('click', () => {
        setTimeout(updateAllLogos, 200);
    });
}

function addStyleToNewWindow(newWin, cssRule) 
{
    var style = newWin.document.createElement('style');
    style.type = 'text/css';
    style.appendChild(newWin.document.createTextNode(cssRule));
    newWin.document.head.appendChild(style);
}

function fetchAllContent() 
{
    var wrapper = document.getElementById('document-wrapper');
    var height = wrapper.scrollHeight;
    var currentPosition = 0;
    var step = 10000; // step size to controll how much it should scroll down at a time 
    var overlay = createOverlay();

    function createOverlay() 
    {
        var overlayDiv = document.createElement('div');
        overlayDiv.style.position = 'fixed';
        overlayDiv.style.top = '0';
        overlayDiv.style.left = '0';
        overlayDiv.style.width = '100%';
        overlayDiv.style.height = '100%';
        overlayDiv.style.backgroundColor = 'white';
        overlayDiv.style.display = 'flex';
        overlayDiv.style.justifyContent = 'center';
        overlayDiv.style.alignItems = 'center';
        overlayDiv.style.borderRadius = '15px';
        overlayDiv.style.zIndex = '1000';
        overlayDiv.innerText = 'Please wait! The content is being loaded.';
        overlayDiv.style.fontSize = '30px';
        document.body.appendChild(overlayDiv);
        return overlayDiv;
    }

    function hideOverlay() 
    {
        overlay.style.display = 'none';
    }

    function scrollStep() 
    {
        if (currentPosition < height) 
        {
            wrapper.scrollTo(0, currentPosition);
            currentPosition += step;
            setTimeout(scrollStep, 50); // time needed to scroll through the step size
        } 
        else 
        {
            hideOverlay();

            // wait at the bottom to ensure everything has been loaded
            setTimeout(() => wrapper.scrollTo(0, 0), 50);
        }

        // Cache images as they are loaded
        document.querySelectorAll('img').forEach(img => {
            const src = img.src;
            if (src) 
            {
                // Send the src to the background worker to cache
                chrome.runtime.sendMessage({ action: 'cache', url: src });
            }
        });
    }

    scrollStep();
}

remove_banner.js:

window.addEventListener('load', function(){
    // Remove the primary banner
    var primaryBanner = document.querySelectorAll('._95f5f1767857')[0];
    if (primaryBanner) {
        primaryBanner.remove();
    }

    // Remove banners for smaller screens
    if (window.innerWidth <= 990){
        var pages = document.getElementById('page-container').childNodes;
        if(pages != null){
            for(i = 0; i < pages.length; i++) {
                if(pages[i].id === ''){
                    pages[i].parentNode.removeChild(pages[i]);
                }
            }
        }
    }

    // Function to remove banner-wrapper elements
    function removeBannerWrapper() {
        var bannerWrappers = document.querySelectorAll('.banner-wrapper');
        bannerWrappers.forEach(function(banner) {
            banner.remove();
        });
    }

    // Call the function to remove banner-wrapper elements
    removeBannerWrapper();

    // Optional: Observe for dynamic changes and remove new banner-wrapper elements
    var observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
            if (mutation.addedNodes.length) {
                removeBannerWrapper();
            }
        });
    });

    var config = { childList: true, subtree: true };
    observer.observe(document.body, config);
});

remove_blur.js:

function unblurImages() {
    const blurredImages = document.querySelectorAll('img[alt*="Blurred content"]');

    blurredImages.forEach((image) => {
        if (image.src.includes('/blurred/')) image.src = image.src.replace('/blurred/', '/');

        if (image.hasAttribute('srcset')) image.srcset = image.srcset.split(',').map(src => src.replace('/blurred/', '/')).join(',');

        image.classList.add('bi', 'x0', 'y0', 'w1', 'h1');

        if (image.parentElement.classList.contains('blurred-container')) image.parentElement.classList.remove('blurred-container');
    });
}

function cleanUpPageContent() {
    const pages = document.querySelectorAll('.page-content');

    pages.forEach(page => {
        Array.from(page.parentNode.childNodes).forEach(sibling => {
            if (sibling !== page && sibling.nodeType === Node.ELEMENT_NODE) sibling.remove();
        });

        page.classList.add('nofilter');
    });
}

window.addEventListener('load', function() {
    cleanUpPageContent();
    document.getElementById('viewer-wrapper').addEventListener('scroll', unblurImages);
    document.getElementById('document-wrapper').addEventListener('scroll', unblurImages);
});

check_version.js:

window.addEventListener('load', function() {
    initializeExtension();
});

function initializeExtension() {
    try {
        let extensionVersion = chrome.runtime.getManifest().version;
        updateAllLogos();
        replaceUserIcons();
        fetchAllContent();
    } catch (error) {
        console.error('Initialization Error:', error);
    }

    try {
        setupSidebarToggleListener();
    } catch (error) {
        console.error('Sidebar Toggle Error:', error);
    }
}

function updateAllLogos() {
    const studocuLogos = document.querySelectorAll('[aria-label="Studocu Logo"]');
    studocuLogos.forEach(updateLogo);
}

function updateLogo(logoElement) {
    const logoSvg = logoElement.firstChild;
    logoSvg.innerHTML = 
    `<g transform="matrix(0.030577, 0, 0, -0.031212, 0.081575, 28.593828)" fill="#000000" stroke="none" style="">
    <path d="M152 849 c-65 -25 -117 -76 -131 -126 -27 -95 -3 -194 58 -246 18 -15 91 -57 162 -93 143 -73 166 -97 154 -161 -13 -70 -123 -98 -184 -48 -16 14 -35 41 -41 60 l-12 35 -79 0 -79 0 0 -43 c0 -59 41 -138 88 -170 47 -33 107 -46 203 -47 183 0 279 81 279 235 -1 121 -47 174 -236 273 -137 71 -163 96 -150 145 8 35 44 58 95 60 45 1 81 -24 101 -74 12 -29 14 -29 92 -29 l80 0 -4 54 c-6 78 -41 126 -119 165 -55 27 -72 31 -143 30 -56 0 -97 -6 -134 -20z" style="fill: rgb(59, 58, 58);"></path>
    <path d="M1670 435 l0 -415 85 0 85 0 0 175 0 175 125 0 125 0 0 -175 0 -175 80 0 80 0 0 415 0 415 -85 0 -85 0 0 -160 0 -160 -120 0 -120 0 0 160 0 160 -85 0 -85 0 0 -415z" style="fill: rgb(1, 153, 236);"></path>
    <path d="M3540 440 l0 -410 80 0 80 0 0 120 c0 149 3 149 104 -11 l72 -114 87 -3 c53 -2 87 1 87 7 0 10 -105 179 -163 265 -15 21 -27 44 -27 51 0 6 41 68 90 138 50 70 90 130 90 132 0 11 -167 4 -182 -7 -8 -7 -35 -42 -58 -78 -47 -72 -79 -110 -92 -110 -4 0 -8 97 -8 215 l0 215 -80 0 -80 0 0 -410z" style="fill: rgb(1, 153, 236);"></path>
    <path d="M699 723 c-1 -10 -1 -32 0 -50 3 -34 -27 -73 -54 -73 -21 0 -35 -33 -35 -84 l0 -46 45 0 45 0 0 -160 c0 -251 5 -257 258 -294 21 -3 22 0 22 75 0 75 -1 79 -22 79 -13 0 -37 9 -54 19 -37 22 -44 52 -44 189 l0 92 60 0 60 0 0 75 0 75 -60 0 -60 0 0 60 0 60 -80 0 c-69 0 -80 -2 -81 -17z" style="fill: rgb(59, 58, 58);"></path>
    <path d="M2516 629 c-94 -22 -146 -76 -146 -153 l0 -36 66 0 c59 0 70 3 100 30 19 16 45 32 58 36 34 8 79 -16 91 -50 8 -24 6 -31 -13 -46 -12 -10 -46 -21 -74 -25 -207 -25 -258 -62 -258 -187 0 -110 64 -180 177 -194 63 -8 112 7 159 48 34 30 34 30 34 7 0 -42 11 -48 78 -42 l64 6 -4 246 c-3 235 -4 248 -26 282 -44 71 -183 107 -306 78z m174 -374 c0 -46 -23 -101 -48 -114 -80 -43 -178 37 -128 104 9 12 37 23 82 31 98 17 94 18 94 -21z" style="fill: rgb(1, 153, 236);"></path>
    <path d="M3071 619 c-79 -31 -123 -102 -142 -230 -15 -101 7 -234 48 -293 49 -69 80 -81 218 -81 110 0 124 2 165 25 55 31 89 88 92 156 l3 49 -78 3 -77 3 -6 -30 c-17 -85 -125 -108 -178 -38 -18 25 -21 42 -21 137 0 126 14 158 79 175 50 12 85 -7 111 -62 l20 -42 78 -1 c87 0 85 -2 66 80 -15 65 -47 107 -103 135 -44 22 -63 25 -150 24 -56 0 -112 -5 -125 -10z" style="fill: rgb(1, 153, 236);"></path>
     <path d="M1050 388 c0 -205 3 -238 19 -274 37 -81 101 -108 250 -102 119 4 164 24 201 89 24 43 25 50 28 282 l4 237 -81 0 -81 0 0 -194 c0 -111 -5 -206 -11 -224 -13 -37 -55 -57 -104 -48 -62 12 -65 26 -65 258 l0 208 -80 0 -80 0 0 -232z" style="fill: rgb(59, 58, 58);"></path>
    </g>`;
}

function replaceUserIcons() {
    const userIcons = document.querySelectorAll('.svg-inline--fa.fa-user.fa-fw._db78be352894._6d88284663af');
    if (userIcons.length === 0) {
        console.log('No user icons found.');
        return;
    }

    userIcons.forEach(replaceIconWithSvg);
}

function replaceIconWithSvg(iconElement) {
    const svgContainer = document.createElement('div');
    svgContainer.innerHTML = 
    `<svg xmlns="http://www.w3.org/2000/svg" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" width="556" height="769" viewBox="31.5 82.5 556 769">
            <rect fill="#14213d" width="556" height="769" x="31.5" y="82.5"/>
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            </svg>`;
    iconElement.parentNode.replaceChild(svgContainer.firstChild, iconElement);
}

function setupSidebarToggleListener() {
    const sidebarToggleButton = document.querySelector('[data-test-selector="content-sidebar-toggle"]');
    sidebarToggleButton.addEventListener('click', () => {
        setTimeout(updateAllLogos, 200);
    });
}

function addStyleToNewWindow(newWin, cssRule) 
{
    var style = newWin.document.createElement('style');
    style.type = 'text/css';
    style.appendChild(newWin.document.createTextNode(cssRule));
    newWin.document.head.appendChild(style);
}

function fetchAllContent() 
{
    var wrapper = document.getElementById('document-wrapper');
    var height = wrapper.scrollHeight;
    var currentPosition = 0;
    var step = 10000; // step size to controll how much it should scroll down at a time 
  var overlay = createOverlay();

    function createOverlay() 
  {
        var overlayDiv = document.createElement('div');
        overlayDiv.style.position = 'fixed';
        overlayDiv.style.top = '0';
        overlayDiv.style.left = '0';
        overlayDiv.style.width = '100%';
        overlayDiv.style.height = '100%';
        overlayDiv.style.backgroundColor = 'white';
        overlayDiv.style.display = 'flex';
        overlayDiv.style.justifyContent = 'center';
        overlayDiv.style.alignItems = 'center';
        overlayDiv.style.borderRadius = '15px';
        overlayDiv.style.zIndex = '1000';
        overlayDiv.innerText = 'Please wait! The content is being loaded.';
      overlayDiv.style.fontSize = '30px';
        document.body.appendChild(overlayDiv);
        return overlayDiv;
    }

    function hideOverlay() 
  {
        overlay.style.display = 'none';
    }

    function scrollStep() 
  {
        if (currentPosition < height) 
      {
            wrapper.scrollTo(0, currentPosition);
            currentPosition += step;
            setTimeout(scrollStep, 50); // time needed to scroll through the step size
        } 
      else 
      {
            hideOverlay();

          // wait at the bottom to ensure everything has been loaded
            setTimeout(() => wrapper.scrollTo(0, 0), 50);
        }

        // Cache images as they are loaded
        document.querySelectorAll('img').forEach(img => {
            const src = img.src;
            if (src) 
            {
                // Send the src to the background worker to cache
                chrome.runtime.sendMessage({ action: 'cache', url: src });
            }
        });
    }

    scrollStep();
}

remove_banner.js:

window.addEventListener('load', function(){
    // Remove the primary banner
    var primaryBanner = document.querySelectorAll('._95f5f1767857')[0];
    if (primaryBanner) {
        primaryBanner.remove();
    }

    // Remove banners for smaller screens
    if (window.innerWidth <= 990){
        var pages = document.getElementById('page-container').childNodes;
        if(pages != null){
            for(i = 0; i < pages.length; i++) {
                if(pages[i].id === ''){
                    pages[i].parentNode.removeChild(pages[i]);
                }
            }
        }
    }

    // Function to remove banner-wrapper elements
    function removeBannerWrapper() {
        var bannerWrappers = document.querySelectorAll('.banner-wrapper');
        bannerWrappers.forEach(function(banner) {
            banner.remove();
        });
    }

    // Call the function to remove banner-wrapper elements
    removeBannerWrapper();

    // Optional: Observe for dynamic changes and remove new banner-wrapper elements
    var observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
            if (mutation.addedNodes.length) {
                removeBannerWrapper();
            }
        });
    });

    var config = { childList: true, subtree: true };
    observer.observe(document.body, config);
});

remove_blur.js:

function unblurImages() {
    const blurredImages = document.querySelectorAll('img[alt*="Blurred content"]');

    blurredImages.forEach((image) => {
        if (image.src.includes('/blurred/')) image.src = image.src.replace('/blurred/', '/');

        if (image.hasAttribute('srcset')) image.srcset = image.srcset.split(',').map(src => src.replace('/blurred/', '/')).join(',');

        image.classList.add('bi', 'x0', 'y0', 'w1', 'h1');

        if (image.parentElement.classList.contains('blurred-container')) image.parentElement.classList.remove('blurred-container');
    });
}

function cleanUpPageContent() {
    const pages = document.querySelectorAll('.page-content');

    pages.forEach(page => {
        Array.from(page.parentNode.childNodes).forEach(sibling => {
            if (sibling !== page && sibling.nodeType === Node.ELEMENT_NODE) sibling.remove();
        });

        page.classList.add('nofilter');
    });
}

window.addEventListener('load', function() {
    cleanUpPageContent();
    document.getElementById('viewer-wrapper').addEventListener('scroll', unblurImages);
    document.getElementById('document-wrapper').addEventListener('scroll', unblurImages);
});

I will try it in a bit and get back to you if it doesnt or of it does

@chrisfeldkircher seems that it doesnt work can you try with this https://www.studocu.com/it/document/uniwersytet-im-adama-mickiewicza-w-poznaniu/prawo-miedzynarodowe-publiczne/skrypt-prawo-miedzynarodowe-publiczne-uam/21657310

ps. if u have discord i think its better to move there for this issue

@Destro9000 Hmm, I see. I get the same error. Weirdly, it works with some documents rather than with others. I'll need to investigate this a little further. It looks like it's a different CDN. The document you sent uses CloudFront, whereas the ones it worked with used https://pieces.studocu.com. I do not know why they would distribute their resources like this, but it could be location-based or due to other factors. Yes, discord sounds good.

@Destro9000 Hmm, I see. I get the same error. Weirdly, it works with some documents rather than with others. I'll need to investigate this a little further. It looks like it's a different CDN. The document you sent uses CloudFront, whereas the ones it worked with used https://pieces.studocu.com. I do not know why they would distribute their resources like this, but it could be location-based or due to other factors. Yes, discord sounds good.

You can send the request

Hey, have you solved this issue?

@jacobcarrot No, I am still working on it. Unfortunately, it does not seem to be that easy. Two different CDNs are used. One is hosted on their own server (https://pieces.studocu.com/), and the other is hosted by Amazon (https://d3tvd1u91rr79.cloudfront.net/). For some reason (it may be geographical nature to load resources more efficiently; Spotify and Co. use the same strategy to ensure global efficient distribution), they employ their own CDN for some documents, where the plugin works just fine, and for others, they use the Amazon one. When we try to replace the /blurred part in the image src, it gives a 403 (unauthorized access error). When a document is uploaded, it gets processed, where the text of the pdf is extracted, and only the parts (like graphics, images, and so on) are stored as images. When you now try to access the uploaded document, the image is loaded as background, and the text is laid over it. As you might have realized, no text is overlayed when the image is blurred. It is hard to circumvent this, as getting the unblurred images is only part of the problem. I am currently trying to understand how the text is loaded. However, the js code is quite messy as it uses extensive libraries (react, PerimeterX (against web-scrapping), and so on), which are loaded in chunks. They use signed URLs to access Amazon content; therefore, injecting the images into a freely accessible document does not work as the policy and Signature parameters encode the path. The signature is encrypted ( I don't think it is feasible to try to crack it as Amazon most likely securely implemented it). Another idea I had was to use a denoising auto-encoder, but as I already said, the images are merely used as background, so this would not yield any text.

Policy: {"Statement":[{"Resource":"https:\/\/d3tvd1u91rr79.cloudfront.net\/bca7e0456f3b371544daa0811da7fb49\/html\/pages\/blurred\/*","Condition":{"DateLessThan":{"AWS:EpochTime":1705573309}}}]}

after doing all the adjustments I am still getting this blurred page content issue

@jacobcarrot No, I am still working on it. Unfortunately, it does not seem to be that easy. Two different CDNs are used. One is hosted on their own server (https://pieces.studocu.com/), and the other is hosted by Amazon (https://d3tvd1u91rr79.cloudfront.net/). For some reason (it may be geographical nature to load resources more efficiently; Spotify and Co. use the same strategy to ensure global efficient distribution), they employ their own CDN for some documents, where the plugin works just fine, and for others, they use the Amazon one. When we try to replace the /blurred part in the image src, it gives a 403 (unauthorized access error). When a document is uploaded, it gets processed, where the text of the pdf is extracted, and only the parts (like graphics, images, and so on) are stored as images. When you now try to access the uploaded document, the image is loaded as background, and the text is laid over it. As you might have realized, no text is overlayed when the image is blurred. It is hard to circumvent this, as getting the unblurred images is only part of the problem. I am currently trying to understand how the text is loaded. However, the js code is quite messy as it uses extensive libraries (react, PerimeterX (against web-scrapping), and so on), which are loaded in chunks. They use signed URLs to access Amazon content; therefore, injecting the images into a freely accessible document does not work as the policy and Signature parameters encode the path. The signature is encrypted ( I don't think it is feasible to try to crack it as Amazon most likely securely implemented it). Another idea I had was to use a denoising auto-encoder, but as I already said, the images are merely used as background, so this would not yield any text.

Policy:

{"Statement":[{"Resource":"https:\/\/d3tvd1u91rr79.cloudfront.net\/bca7e0456f3b371544daa0811da7fb49\/html\/pages\/blurred\/*","Condition":{"DateLessThan":{"AWS:EpochTime":1705573309}}}]}

Spoiler: they are not doing it for faster loading times but because you posted the solution about removing the /blurred/ in the URL. Studocu developers are watching this repository and they fix anything that gets posted on here. I made the same solution as you and it worked fine for me for like 4 weeks, but since you posted your solution they have patched it for a lot of documents. I currently believe there are no new bypasses.

@KXTOD I've noticed the same. Since they will change it soon anyway, you can still get some images by reconstructing the pieces.studocu CDN url for them by taking the cloudfront.net identifier and using it in the pieces.studocu one. Of course, this will be an easy patch for them, and as I've noticed, they have already initiated to move on to Cloudfront, which will eventually result in the content not being available on pieces.studocu anymore. I have not tested it in the last two weeks; however, it worked for me before that. The replacement timing is essential, as the content is loaded when the users scroll, so loading all the content before replacing the URLs would be advisable. Further, sometimes, it results in a 404 when the content is unavailable on pieces.studocu anymore, which would cause the image only to be displayed by its alt-text. This may help.

https://pieces.studocu.com//html/bg.png?class=docbgsm 360w, https://pieces.studocu.com//html/bg.png?class=docbgmd 700w, https://pieces.studocu.com//html/bg.png?class=docbglg 1000w, https://pieces.studocu.com//html/bg.png?class=docbgxl 1400w

Replace with the identifier found in the cloudfront.net source. Replace with the page number, i.e., the document's page number the image is used in.

@KXTOD I've noticed the same. Since they will change it soon anyway, you can still get some images by reconstructing the pieces.studocu CDN url for them by taking the cloudfront.net identifier and using it in the pieces.studocu one. Of course, this will be an easy patch for them, and as I've noticed, they have already initiated to move on to Cloudfront, which will eventually result in the content not being available on pieces.studocu anymore. I have not tested it in the last two weeks; however, it worked for me before that. The replacement timing is essential, as the content is loaded when the users scroll, so loading all the content before replacing the URLs would be advisable. Further, sometimes, it results in a 404 when the content is unavailable on pieces.studocu anymore, which would cause the image only to be displayed by its alt-text. This may help.

https://pieces.studocu.com//html/bg.png?class=docbgsm 360w, https://pieces.studocu.com//html/bg.png?class=docbgmd 700w, https://pieces.studocu.com//html/bg.png?class=docbglg 1000w, https://pieces.studocu.com//html/bg.png?class=docbgxl 1400w

Replace with the identifier found in the cloudfront.net source. Replace with the page number, i.e., the document's page number the image is used in.

https://pieces.studocu.com also returns 403 now. Seems like they have finally patched all possible ways :/ If you have discord and want to continue investigating with me, please drop your tag below :D

https://github.com/danieltyukov/studocuhack checkout the most latest version of a better extension to solve this problem.

https://github.com/danieltyukov/studocuhack checkout the most latest version of a better extension to solve this problem.

Thank you Daniel, but have you done that connector?

Studocu developers are watching this repository

Yeah - they sneakily read solutions posted and then try to counteract them.

Would be nice if we could have the extension be more flexible so they can't counteract it anymore.

isanchop / stuhack

all pages in this file and others like this are blurred, by the looks of it, it's page 3, 6, 6, 9, 12 (counting in three's) #61