Databases
StackOverflow2013
Postsdbo
POUsing LocalFileSystem to store and display images
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUsing LocalFileSystem to store and display images
    primarykey
    data
    text
    <p>I tried to write a bit of code to retrieve an image file (from Wikimedia Commons), store it locally and then display it. Here my code:</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;script&gt; window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem; function onError(e) { console.log('Error', e); } var xhr = new XMLHttpRequest(); xhr.open('GET', 'http://upload.wikimedia.org/wikipedia/fr/2/26/10_francs_Mathieu_1987_F365-28_revers.jpg', true); xhr.responseType = 'blob'; xhr.onload = function(e) { window.requestFileSystem(PERSISTENT, 1024 * 1024, function(fs) {alert(fs.root.name);}, onError); window.requestFileSystem(PERSISTENT, 1024 * 1024, function(fs) { fs.root.getFile('image.jpg', {create: true}, function(fileEntry) { fileEntry.createWriter(function(writer) { writer.onwrite = function(e) {}; writer.onerror = function(e) {}; var blob = new Blob([xhr.response], {type: 'image/jpeg'}); writer.write(blob); }, onError); }, onError); }, onError); window.requestFileSystem(PERSISTENT, 1024 * 1024, function(fs) { fs.root.getFile('image.jpg', {create: false}, function(fileEntry) { fileEntry.file(function(file) { var reader = new FileReader(); reader.onloadend = function(event) { var img = document.createElement("img"); img.src = event.target.result; document.body.parentNode.insertBefore(img, document.body.nextSibling); }; reader.readAsDataURL(file); }, onError); }, onError); }, onError); }; xhr.send(); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Nothing is displayed. Chrome's console doesn't display any error message, so I have no idea why it's not working. Any clue?</p> <p>Edit :</p> <p>I have just seen I actually get a FileError, code 10, which means QUOTA_EXCEEDED_ERR, even if I start my Google Chrome with these parameters:</p> <pre><code>"C:\Program Files\Google\Chrome\Application\chrome.exe" --allow-file-access-from-files --unlimited-quota-for-files </code></pre> <p>Actually, I get the same error with or without the <code>--unlimited-quota-for-files</code> parameter, which is weird. But I get a File Error 2 without <code>--allow-file-access-from-files</code></p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAlexis Dufrenoy
    1. USAlexis Dufrenoy
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COHow about `window.onload=function(){xhr.send();};`?
      singulars
      1. POUsing LocalFileSystem to store and display images
      1. USPasserby
    2. COThis program is just an experiment to see how things work.
      singulars
      1. POUsing LocalFileSystem to store and display images
      1. USAlexis Dufrenoy
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload