History and XHR issues with Sails running on localhost - json

With the default configuration, I am unable to make XHRs in my Mithril app if I run its Sails server in localhost. All I get is:
XMLHttpRequest cannot load http://localhost:1337/json/test-realms.json. The 'Access-Control-Allow-Origin' header contains the invalid value ''. Origin 'null' is therefore not allowed access.
If I enable CORS with allRoutes: true, origin: '*' that problem goes away, and instead I get:
DOMException: Failed to execute 'replaceState' on 'History': A history state object with URL 'http://localhost:1337/#!/' cannot be created in a document with origin 'null'.
What exactly is the issue here?
Updates:
I am using sails lift as server.
The web app is loaded via http://test.pink. The domain is set to a LAN IP via the HOSTS file.
No resources are loaded via file:/// or localhost.

Turns out the problem was related to Content Security Policy. I had set sandbox 'allow-scripts' 'allow-forms', which as per this and this would treat the page as an iframe with an unique origin.
Disabling the sandbox policy or adding allow-same-origin suffices to fix it.

Related

CORS error on request to public resource from a intranet web page

I have a local web server set up at 192.168.1.39 with domain www.server.local. DNS has been configured to resolve this properly on my router.
Everything worked just fine until recently. My browser started to report the following error if I access page like www.server.local/page.html that references external resources.
Access to CSS stylesheet at 'https://cdn.jsdelivr.net/npm/reveal.js#4.1.0/dist/reset.css' from origin 'http://www.server.local' has been blocked by CORS policy: The request client is not a secure context and the resource is in more-private address space `local`.
However, if http://192.168.1.39/page.html is used, the page opens properly.
But the error message really confuses me, because it suggests the css hosted at jsdelivr is in a private address space! Seriously?! Or did I miss something?
My Browser: Microsoft Edge 94.0.992.31 (Official build) (x86_64)
You can try this solution:
Open Edge and navigate to edge://flags/#block-insecure-private-network-requests
Disable the highlighted option Block insecure private network requests.
Restart Edge and test again.
For more details, you could refer to this blog: https://developer.chrome.com/blog/private-network-access-update/

WebTorrent Broken

I'm trying to figure out how to get web torrent to play a video, but I'm getting some weird errors. Here is a pastebin: https://pastebin.com/raw/3wp5F8Fh
And here is a live version: https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com/
When we go to the chrome console, we get this:
Mixed Content: The page at 'https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com/' was loaded over HTTPS, but requested an insecure script 'http://momentjs.com/downloads/moment.min.js'. This request has been blocked; the content must be served over HTTPS.
/favicon.ico:1 Failed to load resource: the server responded with a status of 404 ()
(index):1 Access to XMLHttpRequest at 'https://nyaa.si/download/941788.torrent' from origin 'https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
webtorrent.min.js:4 Uncaught Error: Error downloading torrent: XHR error
at webtorrent.min.js:5
at t.exports.<anonymous> (webtorrent.min.js:7)
at t.exports.t (webtorrent.min.js:5)
at t.exports.r.emit (webtorrent.min.js:4)
at XMLHttpRequest.c.onerror (webtorrent.min.js:7)
The explanation is in the error message, but in short: your browser has blocked the request because you're using AJAX to communicate with a remote server and that server isn't sending the appropriate 'Access-Control-Allow-Origin' header.
The reason such requests are blocked is to protect you from malicious scripts - if you're logged in to website A and have access to some private data, then website B shouldn't be able to trigger an AJAX request to access that data unless A trusts B.
The general term for this kind of access is 'Cross Origin Resource Sharing' or 'CORS' - for more information, Mozilla have a nice summary here: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
If you have control of the remote server then responding with the appropriate header will allow the request to go through (although note that some browsers such as Safari will still block cookies from the remote server because this technique can be used for tracking).

"Could not get any response" response when using postman with subdomain

I am using postman to test an API I have, all is good when the request does not contain sub-domain, however when I add a sub-domain to URL I am getting this response.
Could not get any response
There was an error connecting to http://subdomain.localhost:port/api/
Why this might have happened:
The server couldn't send a response:Ensure that the backend is working
properly
Self-signed SSL certificates are being blocked:Fix this by turning off
'SSL certificate verification' in Settings > General
Proxy configured incorrectly Ensure that proxy is configured correctly
in Settings > Proxy
Request timeout:Change request timeout in Settings > General
If I copy the same URL from postman and paste it into the browser I get a proper response, is there some kind of configurations I should do to make postman work with sub-domains?
First Go to Settings in Postman:
Off the SSL certificate verification in General Tab:
Off the Global Proxy Configuration and Use System Proxy in Proxy Tab:
Make Request Timeout to 0 (Zero)
Configure Apache:
If the above changes resulted in a 404 response, then continue reading ;-)
Users that host their site locally (like with XAMP and/or WAMP), may be able to visit their virtual sites using https:// prefixed address, but it's a lie, and to really enable SSL (for each virtual-site), configure Apache like:
Open httpd-vhosts.conf file (from Apache's conf/extras directory), in your preferred text editor.
Change the virtual site's settings, into something like:
<VirtualHost *:80 *:443>
ServerName my-site.local
ServerAlias *.my-site.local
DocumentRoot "C:\xampp\htdocs\my-project\public"
SSLEngine on
SSLCertificateFile "path/to/my-generated.cert"
SSLCertificateKeyFile "path/to/my-generated.key"
SetEnv APPLICATION_ENV "development"
<Directory "C:\xampp\htdocs\my-project\public">
Options Indexes FollowSymLinks
AllowOverride All
Order allow, deny
Allow from all
</Directory>
</VirtualHost>
But of course, generate a dummy-SSL-certificate, and change all file paths, like from "path/to/my-generated.cert" into real file addresses.
Finally, test by visiting the local site in the browser, but using http:// (without S) prefixed address; Apache should now give error like:
Bad Request
Your browser sent a request that this server could not understand.
Reason: You're speaking plain HTTP to an SSL-enabled server port.
Instead use the HTTPS scheme to access this URL, please.
I had the same issue. It was caused by a newline at the end of the "Authorization" header's value, which I had set manually by copy-pasting the bearer token (which accidentally contained the newline at its end)
If you get a "Could not get any response" message from Postman native apps while sending your request, open Postman Console (View > Show Postman Console), resend the request and check for any error logs in the console.
Thanks to numaanashraf
Hi This issue is resolved for me.
setting ->general -> Requesttimeout in ms = 0
If all above methods doesn't work check your environment variables, And make sure that the following environments are not set. If those are set and not needed by any other application remove them.
HTTP_PROXY
HTTPS_PROXY
Reference link
For me it was the http://localhost instead of https://localhost.
When getting the following error,
you need to do the following.
Step 1:
In Postman, click the wrench icon, go to settings, then go to the Proxy tab.
Step 2:
Create a custom Proxy. This article explains how to create a custom proxy.
After you create the custom Proxy, make sure you turn the Proxy toggle button to off. I put 61095 in for the proxy server and it worked for me.
Step 3 :
Success
I came up with this solution
In postman go to setting --> proxy
And off Global Proxy Configuration
on the Use System Proxy
And go to windows host configure file
'C:\Windows\System32\drivers\etc\hosts'
Open that file in administrator mode
And add the sub domain to hosts file
For me what worked was to add 127.0.0.1 subdomain.localhost to my host file. On OSX that was /etc/hosts. Not sure why that was necessary as I could reach the subdomain from chrome.
In postman go to setting --> proxy
And off Global Proxy Configuration
For me, it was that route that I was calling in my node server wasn't returning anything. Adding
return res.status(200).json({
message: 'success!',
response: 'success!'
});//
to the route I was calling resolved the issue.
You mentioned you are using a CER certificate.
According to the Postman page on certificates.
Choose your client certificate file in the CRT file field. Currently, we only support the CRT format. Support for other formats (like PFX) will come soon.
The name of the extension CER, CRT doesn't make the certificate that type of certificate but, these are the excepted extensions names.
CER is an X.509 certificate in binary form, DER encoded.
CRT is a binary X.509 certificate, encapsulated in text (base-64) encoding.
You can use OpenSSL to change a CER file into a CRT file. I have not had good luck with it but it looks like this.
openssl x509 -inform PEM -in certificate.cer -out certificate.crt
or
openssl x509 -inform DER -in certificate.cer -out certificate.crt
Postman for Linux Version 6.7.1 - Ubuntu 18.04 - linux 4.15.0-43-generic / x64
I had the same problem and by chance I replaced http://localhost with http://127.0.0.1 and everything worked.
My etc/hosts had the proper entries for localhost and https://localhost requests always worked as expected.
I have no clue why changing localhost for http with 127.0.0.1 solved the issue.
None of these solutions works for me. Postman is not sending any request to the server because postman is not finding the host. So, if you modify your /etc/hosts to
127.0.0.1 localhost
127.0.0.1 subdomain.localhost
It works for me.
For me the issue was that the Content-Length was too big. I placed the content of the body in NotePad++ and counted the characters and put that figure in PostMan and then it worked.
I know it does not directly answer why the op's sub-domain was not working but it might help out someone.
In my case it was invisible spaces that postman didn't recognize, the above string of text renders as without spaces in postman.
I disabled SSL certificate Validation and System Proxy even tried on postman chrome extension(which is about to be deprecated), but when I downloaded and tried Insomnia and it gave those red dots in the place where those spaces were, must have gotten there during copy/paste
For anyone who experienced this issue with real domain instead of localhost and couldn't solve it using ANY OF THE ABOVE solutions.
Try changing your Network DNS (WIFI or LAN) to some other DNS. For me, I used Google DNS 8.8.8.8, 8.8.4.4 and it worked!
solution is very simple if you are using asp.net core 2 application . Inside ConfigureServices method inside startup.cs file all this line
services.AddMvc()
.SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
.AddJsonOptions(x => x.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore);
You just need to turn SSL off to send your request.
Proxy and others come with various errors.
My issue was by putting wrong parameters in the header,
the requested parameters was
Authorization: Token <string>
and is was trying
Authorization Token: <string>
After all the above methods like turning OFF SSL certificate verification, turning ON only Use System Proxy and removing HTTP_PROXY and HTTPS_PROXY system environment variables, it worked.
Note: Had to restart the Postman app, since the environment variables were changed.
Unchecking proxy and SSL Certificate Verification didn't work for me.
Unsetting PROXY environment variables did the trick.
export http_proxy=
export ftp_proxy=
export https_proxy=
Change to the directory where Postman is installed and then:
./Postman
In my case, MVC wasn't able to serialize the results (I accidentally used a model instead of DTO). I debugged down to passing a simple string, which worked. Once I fixed the serialization it all came up.
In my case the (corporate) proxy was using a self-signed SSL certificate which Postman disliked. I discovered it by activating
View->Show Postman console
and retrying the request. The console then showed the certificate error. In
Settings->General
I disabled
SSL certificate verification.
The solution for me, as I'm using the deprecated Postman extension for Chrome, to solve this issue I had to:
Call some GET request using the Chrome Browser itself.
Wait for the error page "Your connection is not private" to appear.
Click on ADVANCED and then proceed to [url] (unsafe) link.
After this, requests through the extension itself should work.
In my case it was a misconfigured subnet. Only one of the 2 subnets in the ELB worked.
I figured this out by doing a nslookup and trying to curl the returned IPs directly. Only one worked.
Postman just kept using the misconfigured one.
I had the same issue.
Turned out my timeout was set too low. I changed it to 30ms thinking it was 30sec. I set it back to 0 and it started working again.
I got the same "Could not get any response" issue because of wrong parameter in header. I fixed it by removing parameter HOST out of header.
PS: Unfortunately, I was pushed to install the other software to get this information. It should be great to get this error message from Postman instead of getting general nonsense.
In my case, I forgot to set the value of the variable in the "CURRENT VALUE" field.
I just experienced this error. In my case, the path was TOO LONG. So url like that gave me this error in postman (fake example)
http://127.0.0.1:5000/api/batch/upload_import_deactivate_from_ready_folder
whereas
http://127.0.0.1:5000/api/batch/upld_impt_deac_ready_folder
worked fine.
Hope it helps someone who by accident read that far...

XMLHttpRequest cannot load http://localhost:9090/receive. No 'Access-Control-Allow-Origin' header is present on the requested resource

I am opening a html file through nginx server and then the html file passes the "POST" request from the dropzone to the nginx server which then proxy_pass to my go server.This go server then accepts the request.
But when i try to use my html file and drop something in the dropzone i get the error :
XMLHttpRequest cannot load http://localhost:9090/receive. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:9009' is therefore not allowed access.
PLease help me out.
In your error above you have the page loading from http://localhost:9009 requesting to http://localhost:9090/. These are different origins according to the Same Origin description here: https://www.rfc-editor.org/rfc/rfc6454#section-5
The origins must match:
scheme
host
port
For you the the scheme and host are the same, but the ports are different. Thus you will need to add the CORS headers to allow the caller to call your server on http://localhost:9090.

Hangout app XMLHttpRequest cannot load error when trying to call a .php file to get data

I am trying to talk to mysql from my Google Hangout app and the test code works fine from an HTML page, but gets blocked when I run it in the app .XML wrapper in a hangout.
There I get this in the console (I had to replace the URLs due to me being new here) :
<<<<<>>>>>
XMLHttpRequest cannot load XXXXXX MY file URL XXXXX. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https XXXXXX GOOGLE USER CONTENT XXXXX' is therefore not allowed access. ifr?url=app%3A%2F%2F609528936436%2Fhangout&container=hangout&view=default&lang=all&country=ALL&debu…:1
GET XXXXXX MY file URL again only with https XXXXX net::ERR_CONNECTION_REFUSED ifr?url=app%3A%2F%2F609528936436%2Fhangout&container=hangout&view=default&lang=all&country=ALL&debu…:1199
XMLHttpRequest cannot load XXXXXX MY file URL XXXXX. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https XXXXXX GOOGLE USER CONTENT XXXXX' is therefore not allowed access. ifr?url=app%3A%2F%2F609528936436%2Fhangout&container=hangout&view=default&lang=all&country=ALL&debu…:1
<<<<<>>>>>
What am I doing wrong? Thank you!
ANSWER Thanks to Gerwin Sturm:
Your problem seems to be that with the Hangout App running inside of an iframe hosted on Google servers your server refuses to send content to this different domain.
Two possible solution:
1) Set the headers on your server to allow cross-origin request. In your php script you should be able to do this by calling
header("Access-Control-Allow-Origin: *");
2) Use https://hangoutiframer.appspot.com, which allows you to run the hangout app on your own server, preventing CORS problems that way.