php - How to load new images, when changed in a web application -

-

How to push new images into a web application, so that the cache can not be taken? When I'm getting a new JS or CSS file, it's easy. Because they are in smart templates, and I have a version number (like a.js? V = 9) in the URL.

Now, there are problems with images: -

They are referred to as CSS files, and I can not have a version variable.

So, how do you do it?

In the middle of the most clean and easy way, I would:

  • In CSS, point to images with URLs with specific markers; Such as " image.png? VERSION_NUMBER " (literaly)
    • This will help to develop the CSS file
    • To avoid any problems with the cache, I will use some kind of "build process", which will mark it as VERSION_NUMBER in each CSS file (and possibly, JS, PHP , HTML, ...)
      • This will create modified files with the correct version number
      • those files will be deployed to the webserver
      • Respect The term as, VERSION_NUMBER may SVN revision of each file; In this way, only the modified files must be modified; But also difficult: for each file (for each url in css file!), You have to set the modification number before changing the marker!

    If some browsers do not cache images / JS / CSS due to string, the marker can be included in file names.

    And now you have "build process", you can also use it for example to reduce JS and CSS files like some other manipulations

    on one side As a note: Yes, the construction process and test preparation takes some time; This server can be easy via PHP for CSS files, using a variable in them to indicate the version number ... but, to serve CSS files (at least one per page PHP; maybe More!) She would not be wise; Therefore, it would be better to take a little longer to write build process ...


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more