I am publishing a website which uses PDF/A exclusively, with no HTML. I’ve been asked to provide an RSS feed, but I have no HTML tags that I could use to reference it.
Is there a standard URL that clients will check without being told? e.g. /rss.xml
Or is there a standard HTTP header that I could populate with the feed location?
Related
I have a relatively large app where there are a lot of user profile pages. I want to make it so that if you share one of the user's profile page it will preview their name and picture on social medias like FB and Twitter (think sharing a Twitch streamer's page on Twitter). I used create-react-app to start the project so I don't have server side rendering or any middleware for pre-rendering tools. Is there another way I can accomplish this?
There two ways you can get this to work
Is the server your files via express server and check for who has the made the request by checking user-agent header from request and if its a bot instead of sending them the usual response you can fetch the required user profile data and use that data to populate the open-graph metatags and return them the HTML with those metatags.
Second way would be to use a network interceptor from the CDN you're using to identify the who is requesting the page (either bot or a person) if its a bot, make a request to your backend to fetch related data and send them the HTML with populated metatags.
Explained approach
Every time a request comes into our server, it comes with a header value user-agent which tells the server who is requesting the resources (human or a bot from Facebook trying to do link preview). Just by comparing a list of known user-agent (so it won't work on all but will work all know platforms and 90% of others.)
Let's say we have something.com where we want the link preview and let's say a request comes for something.com/john. What we will do is check for request that is coming to the server and will check for user-agent property, if its a human it will be redirected to our normal site but if its a bot (so it just wants an HTML for link preview) what we are going to do is since it's our server we can grab the data of akkshay and set the proper metatags inside our HTML and send it back as a response.
So what happens here is whenever a human tries to go for something.com/john he will be redirected to our landing page as he is more concerned about what he sees on his browse but when a bot comes in we will send it HTML response with proper metatags as its the link previews which is the concern for the bot.
This thing can be done on our express server with something like this. But this can also be done infrastructure level.
We are developing an application for Web. Inside that application, to download a file, I have created a WCF Rest service that will download the files based on this link Download using WCF Rest. The purpose is to check for user authentication before downloading. I used streaming concept to download the file. It is now that I have found out few things
When the user downloads the file, he is not able to determine what are the file size and the time remaining. I analyzed and found out that the reason is because, it’s using the “Transfer Encoding: chunked” in the header so that the file will be downloaded in chunks. One of the advantages is that the memory consumption is less in the server even when there are many users downloading a file. So I thought of adding “Content-Length” header, but I found out that you can use only either one of the headers not both. So I was thinking how Hotmail and Gmail were downloading attachments. From my investigation, I found out that Hotmail uses chunking header whereas Gmail uses Content-length header. Also in the case of Gmail, it is also checking if the session is active or not then downloads the file accordingly. I want to achieve the following
a) Like Gmail, I want to check if the session is active or not and then downloads the files accordingly. What will be the method for me to implement it?
b) When downloading the file, I want to use Content-Length header instead of Chunked header. Also the memory consumption should be less. Can we achieve it in WCF Rest? If so how?
c) Is it possible for me to add a header in WCF that will display the file size in the browser Downloads window?
d) When downloading an inline images from WCF, I found out that the image after loading is not cached in local machine. I was thinking that once an image is shown in an HTML page, it will get automatically cached and the next time user visits the page, the image will load from cache instead from server. I want to cache the inline images to cache, what is the option that I can use for it? Are there any headers that I need to specify when downloading an inline image from server?
e) When I download a zip file using WCF in IPhone Chrome browser, it’s not downloading at all. But the same link works in Android Chrome browser. What could be the problem? Am I missing header in WCF?
Are there any methods that will achieve the above?
Regards,
Jollyguy
I'm building a Chromecast app, where I want to stream .m3u8 files (HLS) from a streaming provider. The streaming provider does not add CORS headers to the HTTP headers, which is a requirement for building Chromecast apps.
Is there any way to route the requests through a proxy, and have the proxy add the necessary headers for .m3u8 files? AFAICS, the .m3u8 files further point to files for the different bandwith streams, so it would be necessary to have the proxy add appropriate CORS headers to the header for those files as well.
Here is an example of a link to a .m3u8 file that I want to be able to stream.
Hey I realise I'm a bit late but I thought I would post here in case other find it usefull. I had the same problem when developing a chromecast application. The simple solution I found was to include the TOMODOkorz library this will pass all http requests through it's proxy.
You could host your own proxy and change the library to point to yours relatively easily.
This is actually possible by rewriting the urls within Chromecast's Media Player Library and having these sub-playlists also proxy through a CORS proxy like http://www.corsproxy.com/.
To do this in your custom receiver, do not import the google-hosted library
<script type="text/javascript" src="//www.gstatic.com/cast/sdk/libs/mediaplayer/0.5.0/media_player.js"></script>
Instead, copy the obfuscated javascript directly into your receiver html page, and do the following:
Find+replace g.D.url=k with g.D.url='http://www.corsproxy.com/' + k.replace(/^(?:[a-z]+:)?\/\//i,'')
Find+replace url:k with url:('http://www.corsproxy.com/' + k.replace(/^(?:[a-z]+:)?\/\//i,''))
Now, if you send the initial contentId to Chromecast with the http://www.corsproxy.com/YOUR_M3U8_FILE_HERE you should have a fully functional HLS-playing Chromecast app.
Most providers have the ability to set CORS for their customers. Akamai certainly does.
I've been able to stream HLS to ChromeCast from an S3 bucket by adding a permissive CORS file to the permissions for the bucket.
To answer my own question:
This is not possible without rebroadcasting the streams. .m3u8 files are files containing links to other files, which in the end also contain the binaries. All of these, including the HTTP response containing the binary, needs the CORS headers for the Chromecast to display the contents.
If you're only looking to add CORS headers to textual responses corsproxy.com is a good alternative, a long with several available open source projects.
When the browser requests a website, any website from a HTTP server, which of the two parses the site's content in order to know which other files need to be included on the webpage?
What I mean is this:
the browser asks for the html file and then observers that it needs to import some external css files and HE is the one who requests them.
OR
the HTTP server when faced with a request for a website, parses (already knows) which sites need to be linked to a certain webpage and sends them alongside the html page?
I'm guessing the first case is the correct one, but if someone can confirm and maybe clarify it, I'd appreciate it.
It's all done by the client (which is usually a browser). When it sees <script>, <iframe>, <img>, <link>, etc. tags that reference other documents, it downloads them if necessary.
According to Wikipedia -
The primary function of a web server is to cater web page to the
request of clients using the Hypertext Transfer Protocol (HTTP). This
means delivery of HTML documents and any additional content that may
be included by a document, such as images, style sheets and scripts.
and
The primary purpose of a web browser is to bring information resources
to the user ("retrieval" or "fetching"), allowing them to view the
information ("display", "rendering"), and then access other
information ("navigation", "following links").
It is the Browser that parses the HTML and request for the associated contents.
Hi i have stored some files(pdf, html,doc) in alfresco cms, my requirement is to classify these files using metadata "content-type" filed in the alfresco cms, is it possible to do it by using only alfrensco or do i need to integrate any other crawlers(tika, nutch, lucene) with alfresco to get it. please suggest me a way to do it
Hi This is a simple Rule to move an HTML file to another folder.
If you need more flexibility and just 1 rule instead of a rule for each type, you'll need to write some JavaScript and check on the mime-type field.
The "content-type" metadata are based on the extension of filename put in Alfresco (.pdf, .doc). Files with un-recognized extensions have no valid content-type.
You can simply use "Rules" in Alfresco to organize your files.