I'm trying to to guarantee that fresh JSON is sent to my page every time a user clicks refresh. Currently, if the JSON is updated the webpage will not reflect the change until Apache is restarted.
I have tried the following approaches -
Create a nocache function and call the decorator in the page function
I have tried putting headers in my HTML
Using Command + Shift + R in Chrome for MacOS for a "hard" refresh
No good... I'm beginning to think I'm misunderstanding something. Can someone point out the error of my ways? I copy and pasted the code presented in those links. The first link even speaks about JSON specifically. I can show my exact code being used if desired, but like I said; copy and paste.
Maybe its not even a caching issue, I'm not sure, but I'm open to any ideas!
EDIT:
I know now that my no-cache headers ARE being passed to the HTML. The issue lies somewhere in that the Flask isn't asking MySQL for updated data every time the page is loaded, only when Apache is restarted. So even if fresh data is in MySQL DB it will not be displayed for the user unless Apache gets restarted.
I finally found another post on Stack Overflow regarding my question.
Turns out I need to make my DB connection and form the JSON in the same function. Before I was calling the data from the DB in a separate function and then referencing it to create JSON and pass it to the HTML in a different one. Now everything is inline see HERE.
Related
A little background info...
By far and large the URLs worked perfectly fine. Occasionally either my machine, or the server itself couldn't access the Web Service URL or the Report Manager URL. For the server a restart fixed this, for me I had to reset my winsock which never worked and ended up System Restoring to a working date.
When I say couldn't access I mean getting the "This Page Cannot Be Displayed" message, or the "Please turn on TLS 1.0 etc etc" message.
The last few days the issue is now widespread. Everyone was having issues gettings to the URLs even the server. I figured it may have been some windows updates causing issues so I removed all the updates around the timeframe in which it started and tested and got nothing.
Came back the next day (today) and same issue except the only way to access it is through a hyperlink thats clicked or copy/pasted.
The issue:
If you manually type the URL it will not work. You have to copy and paste the hyperlink from a working page. I used a link to a rendered report and deleted back to /ReportServer and it pulls up the directory. I've never seen something like this happen before.
The Solution:
Apparently you have to type in www. as well
I was so use to skipping that for most pages.
https://analytics.domain.com/ReportServer = fail
https://www.analytics.domain.com/ReportServer = win
I just came across a website pagesource and saw this in the header:
<link href="../css/style.css?V1" rel="stylesheet" type="text/css" />
Could we actually pass GET data to css? I tried searching but found no results apart from using PHP. Could anyone help make meaning of the ?V1 after the .css
I know this forum is for asking programming problems, however I decided to ask this since I have found no results in my searches
First of all, no you can't pass GET parameters to CSS. Sorry. That would have been great though.
As for the example url. It can either be a CSS page generated by any web server (doesn't have to be PHP). In this case the server can serve different pages or versions of the same page which might explain the meaning of V1, Version 1. The server can also dynamically generate the page with a server-side template. This is an example from the Jade documentaion:
http://cssdeck.com/labs/learning-the-jade-templating-engine-syntax
It can also just be used as cache buster, for versioning purposes. Whenever you enter a url the browser will try to fetch it only if it doesn't already have a cached copy which is specific to that URL. If you have made a change in your content (in this instance the css file) and you want the browser to use it and not the cached version you can change the url and trick the browser to think it's a new resource that is not cached, so it'll fetch the new content from the server. V1 can then have a symantic meaning to the developer serving as a note (ie I've changed this file once...twice..etc) but not actually do anything but break the cache. This question addresses cache busting.
There are different concepts.
At first, it only is a link - it has a name, it might have an extension, but this is just a convention for humans, and nothing more than a resource identifier for the server. Once the browser requests it, it becomes a server request for a resource. The server then decides how to handle this request. It might be a simple file it just has to return, it might be a server side script, which has to be executed by a server side scripting interpreter, or basically anything else you can imagine.
Again, do not trick yourself in thinking "this is a CSS file", just because it has a css extension, or is called style.
Whatever runs at the server, and actually answers the request, will return something. And this something then is given a meaning. It might be CSS, it might be HTML, it might be JavaScript, or an image or just a binary download. To help the browser to understand what it is, the server returns a Content-Type header.
If no content type is given, the browser has to guess what it is. Or the nice web author gave a hint on what to expect as response - in this case he gave the hint of text/css. Again, this is how the returned content should be interpreted by the client/browser, not how that content is supposed to created on the server side.
And about the ?V1? This could mean different things. Maybe the user can configure a style (theme) for the website and this method is used to dispatch different styles. Or it can be used for something called "cache busting" (look it up).
You can pass whatever you want; the server decides what to do with the data.
After all, PHP isn't your only option for creating a server. If i wrote a server in Node.js, set up a route for /css/style.css and made it return different things depending on what query was given, neither the server nor browser will bat an eyelid.
I'm trying to add some functionality to an internal Access database that will automatically create tasks on Asana.
My VBA experience is somewhat limited but by examining various code samples online and tinkering I've been able to POST tasks with all the necessary data and GET info back.
But I'm now struggling with being able to upload file attachments to a task. I'm not sure how to go about it.
Leaving the content type as application/x-www-form-urlencoded which works for the normal POST statements when creating tasks and just pointing the send command to a file location using doesn't work and results in an error of "file is not an object", I'm guessing this is because all that's contained in the send command is a file=path pair.
Do I need to encode the file at all, if so how?
I'm hoping someone can point me in the right direction.
Thanks.
You can check out how curl does it, but I believe it needs to be multipart/form-data - I would strongly recommend using a library rather than doing the encoding manually, since there are often subtle gotchas.
Basically, it works a lot like a standard form upload from a web browser.
Hope that helps!
From the google site, I cam across a code that lets me display the recaptcha box. Although I must admit I have only started html today and hence, have no basics at all. The site does not have a verify code in html although it does in jsp and I dont know how to link it all since data from the html went to the servlet.
https://developers.google.com/recaptcha/docs/verify
specifis a list of parameters to be 'posted'
I am using Tomcat 7 and no Spring.
My doubts:
Can I have multiple forms in an html file
How do i send parameters from the precious form to the second form?
How do I link a jsp file that will verify it to be run through the java class invoked by the html file
How do I get the user (accessing my app through a local server) remote IP address?
Got sorted out. Since I did not understand the problem in that, I proceeded to simple captcha itself. I must admit I feel like a fool saying I din't know html/jsp. The second day it was all so clear. I must have been positively psyched. Unwilling to see the not working code again, I started fresh.
Answers :
I can have multiple forms in a html
as set and get parameter as a session and request functions respectively.
through a form itself or response.sendredirect("")
Remote address class and methods.
I am developing a website in PHP and I am using mod-rewrite rules. I want to use the Netbeans Run Configuration (under project properties) to set code entry points that looks like http://project/news or http://project/user/12
It seems Netbeans have a problem with this and needs an entry point to a physical file like http://project/user.php?id=12
Has anyone found a good way to work around this?
I see your question is a bit old, but since it has no answer, I will give you one.
What I did to solve the problem, was to give netbeans what it wants in terms of a valid physical file, but provide my controller (index.php in this case) with the 'data' to act correctly. I pass this data using a query parameter. Using your example of project being the web site domain and user/12 as the URL, use the following in the NetBeans Run Configuration and arguments boxes. netbeans does not need the ? as it inserts that automatically, see the complete url below the input boxes
Project URL: http://project
Index File: index.php *(put your controller name here)*
Arguments: url=user/12
http://project/index.php?url=user/12
Then in your controller (index.php in this example), test for the url query param and if it exists parse it instead of the actual Server Request, as you would do normally.
I also do not want the above URL to be publically accessible. So, by using an IS_DEVELOPER define, which is true only for configured developer IP addresses, I can control who has access that special url.
If you are trying to debug specific pages, alternatively, you can set the NetBeans run configuration to:
http://project/
and debug your project, but you must run through your home page once and since the debugger is now active, just navigate to http://project/user/12 in your browser and NetBeans will debug at that entry point. I found passing through my home page every time a pain, so I use the technique above.
Hopefully that provides enough insight to work with your project. It has worked good for me and if you need more detail, just ask.
EDIT: Also, one can make the Run Configuration Project URL the complete url http://project/user/12 and leave the Index File and Arguments blank and that works too without any special code in controller. (tested in NetBeans 7.1). I think I will start using this method.