Using the HTML5 File API, I wonder if I can process the content of a file on the fly.
I know I can get the content of the file when onload is called:
function fileLoaded(e)
{
alert("content is "+e.target.result);
}
but can I get the current content when onprogress is called ?
Thanks.
Seems like yes, according to the spec. The onprogress event will fill the result property of your FileReader as more data is read in. However, as Matt pointed out, if you're only interested in a portion of the file in the first place, only read that section:
var blob = file.webkitSlice|mozSlice(startByte, stopByte, contentType);
reader.readAsBinaryString(blob);
I don't think so, but look at this example which shows you how to read slices of files.
Related
I am making an API call and reading the response in JSON
r = requests.get(query_url, headers=headers)
pprint(r.json())
But the 'content' is not in text format
'content': 'CmRlbGV0ZSBmcm9tICB7eyBwYXJhbXMuY3VyYXRlZF9kYXRhYmFzZV9uYW1l\n'
'IH19LmNybS5BRkZJTElBVEVfUFJJQ0lORzsKCklOU0VSVCBJTlRPICB7eyBw\n'
'TkcKICB3aGVyZSAxID0gMQogIAogIDsKICAKICAKCg==\n'
How do I convert the 'content' to text
For full context, I am trying to download code from the GitHub repo as text to store in our Database
Are you using python and in particular the requests package? If so, I think you could use r.text.
docs: https://pypi.org/project/requests/
Thanks to the article #CherryDT pointed me to, I was able to get the text
import base64
r_dict = r.json()
content = r_dict['content']
base64.b64decode(content)
In WebKitGtk1 there was a function to load an html page directly from a string.
webkit_web_view_load_string ()
Requests loading of the given content with the specified mime_type ,
encoding and base_uri .
Is there an equivalent in WebKitGtk2? I would like to display an HTML page that is re-generated very often, so saving it as a file and loading this file is no option.
http://webkitgtk.org/reference/webkit2gtk/stable/WebKitWebView.html
There are few load methods e.g. webkit_web_view_load_html. Please pick up the one that suits your needs.
I'm using Sahi for Test Automation of web application. I have to write a script for sahi for uploading a file. But unfortunately I don't know the way. Can anybody please help me?
File upload can be a complex thing depending upon any validations you do on the upload. For a starter, you can try out the following:
Synatx:
_setFile(element, filePath [, actionURL])
eg:
_setFile(_file("id"), "C:\abc\efg.jpg", "formSubmit.jsp");
If there are javascript validations on the file field, you can try this hack. Before submitting the file, change the field’s type to “text”, and then set its value. Eg.
// set the file
_setFile(_file("file"), "scripts/demo/uploadme.txt");
// Change the "type" attribute of file field
if (_isIE()){
_call(_file("file").outerHTML = _file("file").outerHTML.replace(/type=['"]?file['"]?/, "type=text"));
}else{
_call(_file("file").type = "text");
}
// Set the value into the textbox
_setValue(_textbox("file"), "scripts/demo/uploadme.txt");
This works for most of the cases. If you still get any error, you can post it here.
Thanks,
Vivek
You can use the following
_setFile(_file("id"), "C:\\abc\\efg.jpg");
Not sure if you need anything more complex?
Note that as of Sahi 4.3, there is a _setFile2 function that automatically handles js validations and does this input type conversion.
I've solved using the function setFile2, with internally changes the type of field to text
I am currently trying to build my first Safari extension. The SafariBrowserTab Class has a Method called "visibleContentsAsDataURL".
I don't exactly understand what it does and can't get it to work.
The docs just say: "Returns a data URL for an image of the visible contents of the tab."
What does it mean? That I get the URL of a screenshot of the tabs' content back? Can someone explain me?
Thanks!
I think it returns what is effectively a screenshot of the tab. The format is explained here
http://en.wikipedia.org/wiki/Data_URI_scheme
According to Apple's Safari reference documentation the return value is "a base-64 encoded PNG."
A data URL is a specal type of url basically consisting of a mimetype and data, in the case of png you'll get something along the lines of:
data:image/png;base64;lotsofstuff
You can then do whatever you want with it (it's just a string), or if you want to display the content:
img = new Image();
img.src = someTab.visibleContentsAsDataURL();
someElement.appendChild(img);
or
someCanvasContext.drawImage(img);
etc
I am trying to find the name of ID of the input item that coresponds to the
file that is being uploaded...
<input type="file" id="FUtxtval1" name="FUtxtval1"/>
iterating over input items to find the first file input field:
function FindFirstFileFieldId()
{
var inputFields = document.getElementsByTagName("input")
for(var i=0;i<inputFields.length;i++)
{
if(inputFields[i].type=="file")
return inputFields[i].id;
}
}
The ID of the element is simply "FUtxtval1" (whatever is in the ID tag)
--
For JavaScript you can access this by using
var element = document.getElementById('FUtxtval1');
So you could then do something like
document.element.disabled=true;
--
For jQuery (Also JavaScript) you would use
$('#FUtxtval1').whatever
--
For PHP you would use
$_POST['FUtxtval1']
Assuming this is part of a form
For PHP if you actually want the file you use the handle
$_FILES['FUtxtval1']['whateverwanted'];
See http://www.tizag.com/phpT/fileupload.php
If the problem is that there may be many input tags on the form, and you're interested in discovering which one is specifically used for uploading files, this bit of jQuery code would accomplish that:
var id = $('input[type=file]').attr('id');
If the problem is that you know the element's ID but do not know the name of the field, you can use:
var name = $('#FUtxtval1').attr('name');
If you're hoping to find out the filename of the file your visitor has chosen in that field through JavaScript, you're stuck. JavaScript does not get any access to that information. You'll have to submit the form and let a server-side script determine the filename at that time.
If I understand correctly, you are trying to obtain the id of the uploaded file using javascript? If so, you will have to process the uploaded file using php ($_FILES['FUtxtval1']) and then print the id to a javascript variable.
Is that what you wanted?
If not, update your q to provide a bit more info about what you are trying to achieve.