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Hello, friends, in this video, I will discuss the cookies in a flask application.

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What are the cookies?

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Cookie is a very important piece of information that the server stores in the clients computer, so

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that.

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If the client comes into contact with the server again and again the next time.

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So in order to process or give a better performance out to the client, the server uses this information,

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for example.

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The statistics of the frequent usage of those resources by a particular claim, all these.

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Information that is stored by thus it is stored by the server, but it is badly stored in the cloud,

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so such a piece of information stored by the server in the plant's computer in the form of the text

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files.

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He's calling it cookie.

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What is the purpose?

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It is the purpose of these cookies is to remember.

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And track the data pertaining to the frequency of use of the world's resources by a particular class.

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That is the purpose of the cookies, the request object.

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We have seen that the request of the requests that request object attributes is cookies.

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One of the attributes is cookies.

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It is a dictionary object and it contains what the key value pairs of cookies and the name of the cookie

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and the value of cookie.

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All these cookies and their values stored by the seller in the client's computer are extracted whenever

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the client requests.

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I sent the request to the server along with the request, the cookies are also sent, cookies are also

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transmitted.

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In flask, the cookies are set on the response object.

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Went up when the server is required to set a cookie.

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It has to get hold of the response object.

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So in order to.

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Eastern seaboard or create a response object, use a function called let's make response so this response

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function gets the response object and with the help of that, you can execute a function called Let's

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Set Kookie.

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So there are two things, one is for us to find out or get hold of the response object, and then using

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that response object use said cookie function to set a particular cookie name and then.

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In order to bring back the cookie that is a function for let's get get the matter to the root of the

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request, not cookies, attribute will fetch the corresponding value to a particular cookie item in

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their dictionary.

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So in order to set up matter is said, underscore cookie, but then it is to be executed on the response

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object.

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What is the key and what is the value?

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This is the syntax of the second key function or cooking method.

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How do.

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Extract or obtain the response object by using make response, make response out of what this template

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is to be rendered.

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So this is the next thing you are well to.

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Your application is going so as from this particular, you are in.

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Find out what is the response and use this response object, said Kookie.

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So this is how the cookie operation is done.

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Similarly.

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In order to read back.

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That is a function called get so request cookies don't get key, what is the value associated with this

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particular thing?

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So in order to that, this is a python piece of code which is backed up cookie.

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So.

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You are only to find this get kookie, which is you can find our map with a function called Let's Get

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Cooking so requests, not cookies, get user I.D. The name of the cookies is ready.

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It will be stored in the variable called name.

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Just say welcome this name.

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So the welcome, whatever name was stored in the cookie will be printed.

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So these are the two or three different activities are involved in this.

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First is to.

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Set the cookie up, often the response object and get back the value of the cookie.

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So these three, three or four different options, I will do a small exercise in front of you wherein

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you will find that the key, the cookie is set.

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It will show you that the cookie is set and then I have another piece of code which will read back the

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user I.D. cookie to confirm the operation of this, get Metrozoo.

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All this I will do with the help of an example demonstration in front of you.

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So how to set and read the cookies in a flask application that will slowly with the help of this example.

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So what we have in this Python script is simply.

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Slash or back slash, you are all which is.

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Defined and you're bound to have you function Golez index.

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So when this index function will be executed, when it will be executed, when you when you starters

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are over and give the you less localhost 5000 less.

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So when this index function will be executed, it will render a template called circularly estimate.

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This extremophile is stored in the templates folder.

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What it has said Cookie will present you simply one text box form in which the user I.D. to be entered.

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So let us have a look at this set cookie rotation.

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Well, first, before we explain the rest of the pattern for.

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So this index page is going to handle this set, Cadart estimate.

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This is a simple form in which there is one.

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Input was equal to text in which you can enter the name of the text.

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Input, his name is equal to a name, and then there is a submit button.

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The submit button is clicked, the form that will be posted to the set, Kyuki United Methodist Post.

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Whether this is the purpose of this circus to let the user into the user and posted it to slash, said

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Wokingham, what is that, said Kookie, you are in how it is defined and what is the view function

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associated with that?

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So let us come back to this Python script in which they said, Slash said, Cookie, you are a rule

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is defined.

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Which the root method, the, you know, additionally accepts one more parameter method is equal to

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the word is good, but we are using the post method.

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The associated review function is said Kookie.

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If this condition is true, because anyway, the form is using the post methods we've request darte

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method is equal to post this condition is true.

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So therefore this.

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Block will be executed.

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What is there in the form, letter form, dot, dot form and so an attribute of the form.

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Whatever the user had entered into, it will be stored in the variable called user.

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OK, so now what is the value of this user will be used to set the cookie?

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The name of the cookie will be user already and the value will be.

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Now in flask, the cookies are.

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Attached to the response object, so you have to first obtain the response object by using the function,

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make response.

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So that.

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Brings us to this make response function to be important in the very beginning.

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In addition to the flask, object, template, function, request, object, as well as the make response.

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This is the make response function.

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It this make response function is going to extract the response object out of the template that will

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be rendered by this set Cucu function, the template is real, CUCHILLO traditional.

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So it will fetch the response object and use the set cooking method associated with the response object

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to set the cookie.

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This is the name of the cookie and the value is the user.

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What is the user the.

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You know, user oriented by user on the set, Wookey for.

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OK, and then return Harry the response object.

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So this is what this said kookie function is supposed to do, it will set the cookie.

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Right now, what is there what is there in Israel?

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Well, it is a simple hyperlink, which is.

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When the hyperlink is clicked, the browser will go to this get cookie.

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You know, you are sort of first let us have to have a look at Stephen.

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So this is a simple.

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From formed around click here to read Kookie.

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Which has a SRF is equal to.

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Local laws try to get kooky, worried.

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Nothing much in this ridiculous world, apart from providing a hyperlink.

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Come back to this Python script and we just get kooky.

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You are really defined and bound with this new function called Get Kooky.

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How to Read the Cookie Kids is very.

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Simply get function is available to the request darte, get cookies, not get.

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The request object has cookies, Dawngate function.

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The cookie that was said was usually the name of the cookie will be the parameter to this great function,

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so it will be obtained in the variable called name.

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All you have to do is just to render the text onto the browser.

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Ultimately, the result will be welcome.

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Whatever you ready?

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You have to enter in the beginning in the set cookie form.

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So this is the.

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Mechanism, so slightly complex mechanism.

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Setting the cookie and reading it back will now execute this court, first start the server, then open

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the browser, open the form, enter the user and read it back.

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That sequence will do.

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So the Python script is Europea execute to start the server.

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And in the browser and.

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You this you are in.

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Localhost fighter slash opens up, said capillaries will form, you know, you are to introduce usually.

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I would say every year.

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This login button.

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The data will be posted to set Cookie, this cookie will be set and the real cookie dough will be displayed.

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Give you a hyperlink to click, the click will lead you to the Slashdot wiki world, which will read

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back the copy that was set that.

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So this is this example, this is all demonstrates how to set and how to read back the Khorkina.

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Simple flask application.