I want to save all png images that are loaded along with some webpage into a separate folder.
I am using below code with in Fiddler Script [CustomRules.js].
static function OnBeforeResponse(oSession: Session)
{
if(oSession.url.EndsWith(".png"))
{
oSession.SaveResponseBody();
}
//Actual content of OnBeforeResponse function.
}
Problem here is, I was unable to find any image got saved within Program files/Documents.
Where do “SaveResponseBody()” will save the HTTP Response Body?
Can we give our own custom folder?
My Fiddler version is (v4.4.5.6)
The default SaveResponseBody() method saves the files to your \Documents\Fiddler2\Captures\ folder. If you want to use a different name, use the overload that accepts a filename. You should check the Response's status code is 200 to ensure that you're not trying to save off HTTP/304 responses which won't contain a body. Also, rather than looking at the URL, you probably want to check the response's type.
So you end up with something like this:
if ((oSession.responseCode == 200) &&
oSession.oResponse.headers.ExistsAndContains("Content-Type", "image/png"))
{
SaveResponseBody("C:\\temp\\" + oSession.SuggestedFilename);
}
Note: The manual way of doing this would be to go to the QuickExec box below the Web Sessions list, type select png and hit Enter, then click File > Export > Selected Sessions > Raw Files.
Related
I've got a site that accepts file uploads which are sent as multipart/form-data within a POST request. To verify that the upload, which shows the filename afterwards, is secured against XSS I want to upload a file which contains HTML Tags in the filename.
This is actually harder than I expected. I can't create a file containing < on my filesystem (Windows). Also, I don't know a way to change the filename of the file input element inside the DOM before the upload (which is what I would do with normal/hidden inputs). So I thought about editing the POST body before it's uploaded, but I don't know how. Popular extensions (I recall Tamper Data, Tamper Dev) only let me change headers. I guess this is due to the plugin system of Chrome, which is the Browser I use.
So, what's the simplest way of manipulating the POST requests body? I could craft the entire request using cUrl, but I also need state, lots of additional parameters and session data etc. which gets quite complex... A simple way within the Browser would ne nice.
So, while this is not a perfect solution, it is at least a way to recreate and manipulate the form submit using FormData and fetch. It is not as generic as I'd like it to be, but it works in that case. Just use this code in the devtools to submit the form with the altered filename:
let formElement = document.querySelector('#idForm'); // get the form element
let oldForm = new FormData(formElement);
let newForm = new FormData;
// copy the FormData entry by entry
for (var pair of oldForm.entries()) {
console.log(pair[0]+': '+pair[1]);
if(typeof(pair[1]) == 'object' && pair[1].name) {
// alter the filename if it's a file
newForm.append(pair[0],pair[1],'yourNewFilename.txt');
} else {
newForm.append(pair[0],pair[1]);
}
}
// Log the new FormData
for (var pair of newForm.entries()) {
console.log(pair[0]+': ');
console.log(pair[1]);
}
// Submit it
fetch(formElement.action, {
method: formElement.method,
body: newForm
});
I'd still appreciate other approaches.
Is there a way to store the path to file which user wants to upload, but doesn't have an internet connection (it's a PWA) and reupload it when a connection is back? Or maybe not store the path, but save the file outside browser storage, somewhere on the user's machine (even if it will require some acceptance from the user to allow the browser to read/write files), but I'm not sure if it's even allowed to do.
Currently, I'm storing the whole file as a base64 in IndexedDB, but it's crashing/slowing down the browser when it comes to reading big files (around 100MB). Also, I don't want to overload browser storage.
There's a couple of things to consider.
Storing the data you need to upload in IndexedDB and then reading that in later will be the most widely supported approach. As you say, though, it means taking up extra browser storage. One thing that might help is to skip the step of encoding the file in Base64 first, as in all modern browsers, IndexedDB will gladly store bytes directly for you as a Blob.
A more modern approach, but one that's not currently supported by non-Chromium browsers, would be to use the File System Access API. As described in this article, once you get the user's permission, you can save a handle to a file in IndexedDB, and then read the file later on (assuming the underlying file hasn't changed in the interim). This has the advantage of not duplicating the file's contents in IndexedDB, saving on storage space. Here's a code snippet, borrowed from the article:
import { get, set } from 'https://unpkg.com/idb-keyval#5.0.2/dist/esm/index.js';
const pre = document.querySelector('pre');
const button = document.querySelector('button');
button.addEventListener('click', async () => {
try {
// Try retrieving the file handle.
const fileHandleOrUndefined = await get('file');
if (fileHandleOrUndefined) {
pre.textContent =
`Retrieved file handle "${fileHandleOrUndefined.name}" from IndexedDB.`;
return;
}
// This always returns an array, but we just need the first entry.
const [fileHandle] = await window.showOpenFilePicker();
// Store the file handle.
await set('file', fileHandle);
pre.textContent =
`Stored file handle for "${fileHandle.name}" in IndexedDB.`;
} catch (error) {
alert(error.name, error.message);
}
});
Regardless of how you store the file, it would be helpful to use the Background Sync API when available (again, currently limited to Chromium browsers) to handle automating the upload once the network is available again.
First of all here's my jsFiddle, so you can see what I'm talking abuout.
I'm using blueimp/jQuery-File-Upload to manage files in the GUI of my asp-net application (server-side code is OK). If I manage the upload one-by-one I am able to upload that file successfully but as I try to submit the whole list the server does not recognize data and get only an empty list.
Here's the piece of code where my issue is:
//initialize fileupload()
$('#fileupload').fileupload({
//I call this function when I add file(s) to the list
add: function (e, data) {
//I do some more actions here
//Then I define this function when the submit button is clicked
$('#submitButton').click(function () {
//fix this?
data.submit();
});
}
)};
So, what am I doing wrong?
Your server should support multipart forms!
A solid handler for ASP.NET is Backload
I need to do some data analysis on xml data coming in http responses. Is there a way to set fiddler dump these responses automatically on disk?
(I have filtered the responses, dumping the sessions works too)
In a situation like this one I make a simple edit to the OnBeforeResponse function in the Fiddler rules. Choose Rules | Customize Rules and then add something similar to this::
if (oSession.url.Contains(".xml")) {
var directory: String = "C:\\Temp\\XML";
var path: String = System.IO.Path.Combine(directory, Guid.NewGuid() + ".xml");
oSession.SaveResponseBody(path);
}
The line that I am using to 'filter' the requests may not be appropriate for your situation -- you should attempt to repeat the filter condition that you used in the Fiddler UI.\
Hope that helps.
It would be great if we could manage the titles of each image that we upload when uploading multiple images. This way I could select each image that I want to upload, title them, then hit the upload button. Right now one must either upload one by one or have all the selected images have the same title.
Kinda like Facebook or Panoramio where it's easy to manage the titles of the images before uploading.
This isn't natively supported in Fine Uploader at the moment, but I've opened up a feature request and tentatively scheduled it for the 3.7 milestone. In the meantime, you can certainly provide your own UI elements to allow users to provide alternate names for each upload-able item and pass these new names as a parameter. Server-side, you would have to parse this parameter and associate it with the uploaded item. Fine Uploader will have to adopt a parameter name that contains the user-supplied alternate filename anyway (and the server will have to be aware of this convention and parse this parameter), since we won't be able to change the value file input field sent along with the multipart encoded request.
use this:
var uploader = $('.uploader'),
titleBox = $('input[type=text]');
uploader.fineUploader({
request: {
endpoint: 'path/to/url'
},
formatFileName: function (name) {
var title = titleBox.val() + ' - ' + name + '';
titleBox.val('');
return title;
},
});
uploader.on('submit', function (event, id, name) {
uploader.fineUploader('setParams', {title: titleBox.val()}, id);
});